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8bae0a0c JSC |
1 | /*> interp.c <*/ |
2 | /* Simulator for the MIPS architecture. | |
3 | ||
4 | This file is part of the MIPS sim | |
5 | ||
6 | THIS SOFTWARE IS NOT COPYRIGHTED | |
7 | ||
8 | Cygnus offers the following for use in the public domain. Cygnus | |
9 | makes no warranty with regard to the software or it's performance | |
10 | and the user accepts the software "AS IS" with all faults. | |
11 | ||
12 | CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO | |
13 | THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
14 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
15 | ||
16 | $Revision$ | |
17 | $Author$ | |
e3d12c65 | 18 | $Date$ |
8bae0a0c JSC |
19 | |
20 | NOTEs: | |
21 | ||
22 | We only need to take account of the target endianness when moving data | |
23 | between the simulator and the host. We do not need to worry about the | |
24 | endianness of the host, since this sim code and GDB are executing in | |
25 | the same process. | |
26 | ||
27 | The IDT monitor (found on the VR4300 board), seems to lie about | |
28 | register contents. It seems to treat the registers as sign-extended | |
29 | 32-bit values. This cause *REAL* problems when single-stepping 64-bit | |
30 | code on the hardware. | |
31 | ||
32 | */ | |
33 | ||
34 | /* The TRACE and PROFILE manifests enable the provision of extra | |
35 | features. If they are not defined then a simpler (quicker) | |
36 | simulator is constructed without the required run-time checks, | |
37 | etc. */ | |
38 | #if 1 /* 0 to allow user build selection, 1 to force inclusion */ | |
39 | #define TRACE (1) | |
40 | #define PROFILE (1) | |
41 | #endif | |
42 | ||
2e61a3ad AC |
43 | #include "bfd.h" |
44 | #include "sim-main.h" | |
45 | #include "sim-utils.h" | |
46 | #include "sim-options.h" | |
50a2a691 | 47 | #include "sim-assert.h" |
2e61a3ad | 48 | |
4fa134be ILT |
49 | #include "config.h" |
50 | ||
8bae0a0c JSC |
51 | #include <stdio.h> |
52 | #include <stdarg.h> | |
53 | #include <ansidecl.h> | |
54 | #include <signal.h> | |
55 | #include <ctype.h> | |
56 | #include <limits.h> | |
57 | #include <math.h> | |
4fa134be ILT |
58 | #ifdef HAVE_STDLIB_H |
59 | #include <stdlib.h> | |
60 | #endif | |
61 | #ifdef HAVE_STRING_H | |
62 | #include <string.h> | |
63 | #else | |
64 | #ifdef HAVE_STRINGS_H | |
65 | #include <strings.h> | |
66 | #endif | |
67 | #endif | |
8bae0a0c JSC |
68 | |
69 | #include "getopt.h" | |
70 | #include "libiberty.h" | |
9d52bcb7 | 71 | #include "bfd.h" |
8bae0a0c | 72 | #include "callback.h" /* GDB simulator callback interface */ |
e3d12c65 | 73 | #include "remote-sim.h" /* GDB simulator interface */ |
8bae0a0c JSC |
74 | |
75 | #include "support.h" /* internal support manifests */ | |
76 | ||
f24b7b69 JSC |
77 | #include "sysdep.h" |
78 | ||
53b9417e DE |
79 | #ifndef PARAMS |
80 | #define PARAMS(x) | |
81 | #endif | |
82 | ||
83 | char* pr_addr PARAMS ((SIM_ADDR addr)); | |
87e43259 | 84 | char* pr_uword64 PARAMS ((uword64 addr)); |
53b9417e | 85 | |
f24b7b69 JSC |
86 | #ifndef SIGBUS |
87 | #define SIGBUS SIGSEGV | |
88 | #endif | |
89 | ||
8bae0a0c JSC |
90 | /* Get the simulator engine description, without including the code: */ |
91 | #define SIM_MANIFESTS | |
92 | #include "engine.c" | |
93 | #undef SIM_MANIFESTS | |
94 | ||
50a2a691 | 95 | struct sim_state simulator; |
f7481d45 | 96 | |
8bae0a0c JSC |
97 | /* The following reserved instruction value is used when a simulator |
98 | trap is required. NOTE: Care must be taken, since this value may be | |
99 | used in later revisions of the MIPS ISA. */ | |
53b9417e DE |
100 | #define RSVD_INSTRUCTION (0x00000005) |
101 | #define RSVD_INSTRUCTION_MASK (0xFC00003F) | |
102 | ||
103 | #define RSVD_INSTRUCTION_ARG_SHIFT 6 | |
104 | #define RSVD_INSTRUCTION_ARG_MASK 0xFFFFF | |
105 | ||
8bae0a0c JSC |
106 | |
107 | /* NOTE: These numbers depend on the processor architecture being | |
108 | simulated: */ | |
109 | #define Interrupt (0) | |
110 | #define TLBModification (1) | |
111 | #define TLBLoad (2) | |
112 | #define TLBStore (3) | |
113 | #define AddressLoad (4) | |
114 | #define AddressStore (5) | |
115 | #define InstructionFetch (6) | |
116 | #define DataReference (7) | |
117 | #define SystemCall (8) | |
118 | #define BreakPoint (9) | |
119 | #define ReservedInstruction (10) | |
120 | #define CoProcessorUnusable (11) | |
121 | #define IntegerOverflow (12) /* Arithmetic overflow (IDT monitor raises SIGFPE) */ | |
122 | #define Trap (13) | |
123 | #define FPE (15) | |
124 | #define Watch (23) | |
125 | ||
126 | /* The following exception code is actually private to the simulator | |
127 | world. It is *NOT* a processor feature, and is used to signal | |
128 | run-time errors in the simulator. */ | |
129 | #define SimulatorFault (0xFFFFFFFF) | |
130 | ||
131 | /* The following are generic to all versions of the MIPS architecture | |
132 | to date: */ | |
133 | /* Memory Access Types (for CCA): */ | |
134 | #define Uncached (0) | |
135 | #define CachedNoncoherent (1) | |
136 | #define CachedCoherent (2) | |
137 | #define Cached (3) | |
138 | ||
139 | #define isINSTRUCTION (1 == 0) /* FALSE */ | |
140 | #define isDATA (1 == 1) /* TRUE */ | |
141 | ||
142 | #define isLOAD (1 == 0) /* FALSE */ | |
143 | #define isSTORE (1 == 1) /* TRUE */ | |
144 | ||
145 | #define isREAL (1 == 0) /* FALSE */ | |
146 | #define isRAW (1 == 1) /* TRUE */ | |
147 | ||
148 | #define isTARGET (1 == 0) /* FALSE */ | |
149 | #define isHOST (1 == 1) /* TRUE */ | |
150 | ||
151 | /* The "AccessLength" specifications for Loads and Stores. NOTE: This | |
152 | is the number of bytes minus 1. */ | |
153 | #define AccessLength_BYTE (0) | |
154 | #define AccessLength_HALFWORD (1) | |
155 | #define AccessLength_TRIPLEBYTE (2) | |
156 | #define AccessLength_WORD (3) | |
157 | #define AccessLength_QUINTIBYTE (4) | |
158 | #define AccessLength_SEXTIBYTE (5) | |
159 | #define AccessLength_SEPTIBYTE (6) | |
160 | #define AccessLength_DOUBLEWORD (7) | |
53b9417e | 161 | #define AccessLength_QUADWORD (15) |
8bae0a0c JSC |
162 | |
163 | #if defined(HASFPU) | |
164 | /* FPU registers must be one of the following types. All other values | |
165 | are reserved (and undefined). */ | |
166 | typedef enum { | |
167 | fmt_single = 0, | |
168 | fmt_double = 1, | |
169 | fmt_word = 4, | |
170 | fmt_long = 5, | |
171 | /* The following are well outside the normal acceptable format | |
172 | range, and are used in the register status vector. */ | |
173 | fmt_unknown = 0x10000000, | |
174 | fmt_uninterpreted = 0x20000000, | |
175 | } FP_formats; | |
176 | #endif /* HASFPU */ | |
177 | ||
178 | /* NOTE: We cannot avoid globals, since the GDB "sim_" interface does | |
179 | not allow a private variable to be passed around. This means that | |
180 | simulators under GDB can only be single-threaded. However, it would | |
181 | be possible for the simulators to be multi-threaded if GDB allowed | |
182 | for a private pointer to be maintained. i.e. a general "void **ptr" | |
183 | variable that GDB passed around in the argument list to all of | |
184 | sim_xxx() routines. It could be initialised to NULL by GDB, and | |
185 | then updated by sim_open() and used by the other sim_xxx() support | |
186 | functions. This would allow new features in the simulator world, | |
187 | like storing a context - continuing execution to gather a result, | |
188 | and then going back to the point where the context was saved and | |
189 | changing some state before continuing. i.e. the ability to perform | |
190 | UNDOs on simulations. It would also allow the simulation of | |
50a2a691 AC |
191 | shared-memory multi-processor systems. |
192 | ||
193 | [NOTE: This is now partially implemented] */ | |
8bae0a0c JSC |
194 | |
195 | static host_callback *callback = NULL; /* handle onto the current callback structure */ | |
196 | ||
8bae0a0c JSC |
197 | /* This is nasty, since we have to rely on matching the register |
198 | numbers used by GDB. Unfortunately, depending on the MIPS target | |
199 | GDB uses different register numbers. We cannot just include the | |
200 | relevant "gdb/tm.h" link, since GDB may not be configured before | |
201 | the sim world, and also the GDB header file requires too much other | |
202 | state. */ | |
203 | /* TODO: Sort out a scheme for *KNOWING* the mapping between real | |
204 | registers, and the numbers that GDB uses. At the moment due to the | |
205 | order that the tools are built, we cannot rely on a configured GDB | |
206 | world whilst constructing the simulator. This means we have to | |
207 | assume the GDB register number mapping. */ | |
e3d12c65 | 208 | #ifndef TM_MIPS_H |
8bae0a0c | 209 | #define LAST_EMBED_REGNUM (89) |
e3d12c65 | 210 | #endif |
8bae0a0c JSC |
211 | |
212 | /* To keep this default simulator simple, and fast, we use a direct | |
213 | vector of registers. The internal simulator engine then uses | |
214 | manifests to access the correct slot. */ | |
4fa134be ILT |
215 | static ut_reg registers[LAST_EMBED_REGNUM + 1]; |
216 | static int register_widths[LAST_EMBED_REGNUM + 1]; | |
8bae0a0c JSC |
217 | |
218 | #define GPR (®isters[0]) | |
219 | #if defined(HASFPU) | |
220 | #define FGRIDX (38) | |
221 | #define FGR (®isters[FGRIDX]) | |
222 | #endif /* HASFPU */ | |
223 | #define LO (registers[33]) | |
224 | #define HI (registers[34]) | |
225 | #define PC (registers[37]) | |
226 | #define CAUSE (registers[36]) | |
227 | #define SRIDX (32) | |
228 | #define SR (registers[SRIDX]) /* CPU status register */ | |
229 | #define FCR0IDX (71) | |
230 | #define FCR0 (registers[FCR0IDX]) /* really a 32bit register */ | |
231 | #define FCR31IDX (70) | |
232 | #define FCR31 (registers[FCR31IDX]) /* really a 32bit register */ | |
233 | #define FCSR (FCR31) | |
234 | #define COCIDX (LAST_EMBED_REGNUM + 2) /* special case : outside the normal range */ | |
235 | ||
236 | /* The following are pseudonyms for standard registers */ | |
237 | #define ZERO (registers[0]) | |
238 | #define V0 (registers[2]) | |
239 | #define A0 (registers[4]) | |
240 | #define A1 (registers[5]) | |
241 | #define A2 (registers[6]) | |
242 | #define A3 (registers[7]) | |
243 | #define SP (registers[29]) | |
244 | #define RA (registers[31]) | |
245 | ||
53b9417e DE |
246 | |
247 | /* start-sanitize-r5900 */ | |
248 | /* | |
249 | The R5900 has 128 bit registers, but the hi 64 bits are only touched by | |
250 | multimedia (MMI) instructions. The normal mips instructions just use the | |
251 | lower 64 bits. To avoid changing the older parts of the simulator to | |
252 | handle this weirdness, the high 64 bits of each register are kept in | |
253 | a separate array (registers1). The high 64 bits of any register are by | |
254 | convention refered by adding a '1' to the end of the normal register's | |
255 | name. So LO still refers to the low 64 bits of the LO register, LO1 | |
256 | refers to the high 64 bits of that same register. | |
257 | */ | |
258 | ||
259 | /* The high part of each register */ | |
260 | static ut_reg registers1[LAST_EMBED_REGNUM + 1]; | |
261 | ||
262 | #define GPR1 (®isters1[0]) | |
263 | ||
264 | #define LO1 (registers1[33]) | |
265 | #define HI1 (registers1[34]) | |
266 | ||
267 | #define BYTES_IN_MMI_REGS (sizeof(registers[0])+sizeof(registers1[0])) | |
268 | #define HALFWORDS_IN_MMI_REGS (BYTES_IN_MMI_REGS/2) | |
269 | #define WORDS_IN_MMI_REGS (BYTES_IN_MMI_REGS/4) | |
270 | #define DOUBLEWORDS_IN_MMI_REGS (BYTES_IN_MMI_REGS/8) | |
271 | ||
272 | #define BYTES_IN_MIPS_REGS (sizeof(registers[0])) | |
273 | #define HALFWORDS_IN_MIPS_REGS (BYTES_IN_MIPS_REGS/2) | |
274 | #define WORDS_IN_MIPS_REGS (BYTES_IN_MIPS_REGS/4) | |
275 | #define DOUBLEWORDS_IN_MIPS_REGS (BYTES_IN_MIPS_REGS/8) | |
276 | ||
277 | ||
278 | /* | |
279 | SUB_REG_FETCH - return as lvalue some sub-part of a "register" | |
280 | T - type of the sub part | |
281 | TC - # of T's in the mips part of the "register" | |
282 | I - index (from 0) of desired sub part | |
283 | A - low part of "register" | |
284 | A1 - high part of register | |
285 | */ | |
286 | #define SUB_REG_FETCH(T,TC,A,A1,I) (*(((T*)(((I) < (TC)) ? (A) : (A1))) + ((I) % (TC)))) | |
287 | ||
288 | /* | |
289 | GPR_<type>(R,I) - return, as lvalue, the I'th <type> of general register R | |
290 | where <type> has two letters: | |
291 | 1 is S=signed or U=unsigned | |
292 | 2 is B=byte H=halfword W=word D=doubleword | |
293 | */ | |
294 | ||
295 | #define SUB_REG_SB(A,A1,I) SUB_REG_FETCH(signed char, BYTES_IN_MIPS_REGS, A, A1, I) | |
296 | #define SUB_REG_SH(A,A1,I) SUB_REG_FETCH(signed short, HALFWORDS_IN_MIPS_REGS, A, A1, I) | |
297 | #define SUB_REG_SW(A,A1,I) SUB_REG_FETCH(signed int, WORDS_IN_MIPS_REGS, A, A1, I) | |
298 | #define SUB_REG_SD(A,A1,I) SUB_REG_FETCH(signed long long, DOUBLEWORDS_IN_MIPS_REGS, A, A1, I) | |
299 | ||
300 | #define SUB_REG_UB(A,A1,I) SUB_REG_FETCH(unsigned char, BYTES_IN_MIPS_REGS, A, A1, I) | |
301 | #define SUB_REG_UH(A,A1,I) SUB_REG_FETCH(unsigned short, HALFWORDS_IN_MIPS_REGS, A, A1, I) | |
302 | #define SUB_REG_UW(A,A1,I) SUB_REG_FETCH(unsigned int, WORDS_IN_MIPS_REGS, A, A1, I) | |
303 | #define SUB_REG_UD(A,A1,I) SUB_REG_FETCH(unsigned long long,DOUBLEWORDS_IN_MIPS_REGS, A, A1, I) | |
304 | ||
305 | ||
306 | ||
307 | #define GPR_SB(R,I) SUB_REG_SB(®isters[R], ®isters1[R], I) | |
308 | #define GPR_SH(R,I) SUB_REG_SH(®isters[R], ®isters1[R], I) | |
309 | #define GPR_SW(R,I) SUB_REG_SW(®isters[R], ®isters1[R], I) | |
310 | #define GPR_SD(R,I) SUB_REG_SD(®isters[R], ®isters1[R], I) | |
311 | ||
312 | #define GPR_UB(R,I) SUB_REG_UB(®isters[R], ®isters1[R], I) | |
313 | #define GPR_UH(R,I) SUB_REG_UH(®isters[R], ®isters1[R], I) | |
314 | #define GPR_UW(R,I) SUB_REG_UW(®isters[R], ®isters1[R], I) | |
315 | #define GPR_UD(R,I) SUB_REG_UD(®isters[R], ®isters1[R], I) | |
316 | ||
317 | ||
318 | #define RS_SB(I) SUB_REG_SB(&rs_reg, &rs_reg1, I) | |
319 | #define RS_SH(I) SUB_REG_SH(&rs_reg, &rs_reg1, I) | |
320 | #define RS_SW(I) SUB_REG_SW(&rs_reg, &rs_reg1, I) | |
321 | #define RS_SD(I) SUB_REG_SD(&rs_reg, &rs_reg1, I) | |
322 | ||
323 | #define RS_UB(I) SUB_REG_UB(&rs_reg, &rs_reg1, I) | |
324 | #define RS_UH(I) SUB_REG_UH(&rs_reg, &rs_reg1, I) | |
325 | #define RS_UW(I) SUB_REG_UW(&rs_reg, &rs_reg1, I) | |
326 | #define RS_UD(I) SUB_REG_UD(&rs_reg, &rs_reg1, I) | |
327 | ||
328 | #define RT_SB(I) SUB_REG_SB(&rt_reg, &rt_reg1, I) | |
329 | #define RT_SH(I) SUB_REG_SH(&rt_reg, &rt_reg1, I) | |
330 | #define RT_SW(I) SUB_REG_SW(&rt_reg, &rt_reg1, I) | |
331 | #define RT_SD(I) SUB_REG_SD(&rt_reg, &rt_reg1, I) | |
332 | ||
333 | #define RT_UB(I) SUB_REG_UB(&rt_reg, &rt_reg1, I) | |
334 | #define RT_UH(I) SUB_REG_UH(&rt_reg, &rt_reg1, I) | |
335 | #define RT_UW(I) SUB_REG_UW(&rt_reg, &rt_reg1, I) | |
336 | #define RT_UD(I) SUB_REG_UD(&rt_reg, &rt_reg1, I) | |
337 | ||
338 | ||
339 | ||
340 | #define LO_SB(I) SUB_REG_SB(&LO, &LO1, I) | |
341 | #define LO_SH(I) SUB_REG_SH(&LO, &LO1, I) | |
342 | #define LO_SW(I) SUB_REG_SW(&LO, &LO1, I) | |
343 | #define LO_SD(I) SUB_REG_SD(&LO, &LO1, I) | |
344 | ||
345 | #define LO_UB(I) SUB_REG_UB(&LO, &LO1, I) | |
346 | #define LO_UH(I) SUB_REG_UH(&LO, &LO1, I) | |
347 | #define LO_UW(I) SUB_REG_UW(&LO, &LO1, I) | |
348 | #define LO_UD(I) SUB_REG_UD(&LO, &LO1, I) | |
349 | ||
350 | #define HI_SB(I) SUB_REG_SB(&HI, &HI1, I) | |
351 | #define HI_SH(I) SUB_REG_SH(&HI, &HI1, I) | |
352 | #define HI_SW(I) SUB_REG_SW(&HI, &HI1, I) | |
353 | #define HI_SD(I) SUB_REG_SD(&HI, &HI1, I) | |
354 | ||
355 | #define HI_UB(I) SUB_REG_UB(&HI, &HI1, I) | |
356 | #define HI_UH(I) SUB_REG_UH(&HI, &HI1, I) | |
357 | #define HI_UW(I) SUB_REG_UW(&HI, &HI1, I) | |
358 | #define HI_UD(I) SUB_REG_UD(&HI, &HI1, I) | |
359 | /* end-sanitize-r5900 */ | |
360 | ||
361 | ||
362 | /* start-sanitize-r5900 */ | |
363 | static ut_reg SA; /* the shift amount register */ | |
364 | /* end-sanitize-r5900 */ | |
365 | ||
4fa134be | 366 | static ut_reg EPC = 0; /* Exception PC */ |
8bae0a0c JSC |
367 | |
368 | #if defined(HASFPU) | |
369 | /* Keep the current format state for each register: */ | |
4fa134be | 370 | static FP_formats fpr_state[32]; |
8bae0a0c JSC |
371 | #endif /* HASFPU */ |
372 | ||
8bae0a0c | 373 | /* The following are internal simulator state variables: */ |
4fa134be ILT |
374 | static ut_reg IPC = 0; /* internal Instruction PC */ |
375 | static ut_reg DSPC = 0; /* delay-slot PC */ | |
8bae0a0c JSC |
376 | |
377 | ||
378 | /* TODO : these should be the bitmasks for these bits within the | |
379 | status register. At the moment the following are VR4300 | |
380 | bit-positions: */ | |
381 | #define status_KSU_mask (0x3) /* mask for KSU bits */ | |
382 | #define status_KSU_shift (3) /* shift for field */ | |
383 | #define ksu_kernel (0x0) | |
384 | #define ksu_supervisor (0x1) | |
385 | #define ksu_user (0x2) | |
386 | #define ksu_unknown (0x3) | |
387 | ||
388 | #define status_RE (1 << 25) /* Reverse Endian in user mode */ | |
389 | #define status_FR (1 << 26) /* enables MIPS III additional FP registers */ | |
390 | #define status_SR (1 << 20) /* soft reset or NMI */ | |
391 | #define status_BEV (1 << 22) /* Location of general exception vectors */ | |
392 | #define status_TS (1 << 21) /* TLB shutdown has occurred */ | |
393 | #define status_ERL (1 << 2) /* Error level */ | |
394 | #define status_RP (1 << 27) /* Reduced Power mode */ | |
395 | ||
8bae0a0c JSC |
396 | #define cause_BD ((unsigned)1 << 31) /* Exception in branch delay slot */ |
397 | ||
398 | #if defined(HASFPU) | |
399 | /* Macro to update FPSR condition-code field. This is complicated by | |
400 | the fact that there is a hole in the index range of the bits within | |
401 | the FCSR register. Also, the number of bits visible depends on the | |
402 | MIPS ISA version being supported. */ | |
403 | #define SETFCC(cc,v) {\ | |
404 | int bit = ((cc == 0) ? 23 : (24 + (cc)));\ | |
405 | FCSR = ((FCSR & ~(1 << bit)) | ((v) << bit));\ | |
406 | } | |
407 | #define GETFCC(cc) (((((cc) == 0) ? (FCSR & (1 << 23)) : (FCSR & (1 << (24 + (cc))))) != 0) ? 1 : 0) | |
408 | ||
409 | /* This should be the COC1 value at the start of the preceding | |
410 | instruction: */ | |
411 | #define PREVCOC1() ((state & simPCOC1) ? 1 : 0) | |
412 | #endif /* HASFPU */ | |
413 | ||
414 | /* Standard FCRS bits: */ | |
415 | #define IR (0) /* Inexact Result */ | |
416 | #define UF (1) /* UnderFlow */ | |
417 | #define OF (2) /* OverFlow */ | |
418 | #define DZ (3) /* Division by Zero */ | |
419 | #define IO (4) /* Invalid Operation */ | |
420 | #define UO (5) /* Unimplemented Operation */ | |
421 | ||
422 | /* Get masks for individual flags: */ | |
423 | #if 1 /* SAFE version */ | |
424 | #define FP_FLAGS(b) (((unsigned)(b) < 5) ? (1 << ((b) + 2)) : 0) | |
425 | #define FP_ENABLE(b) (((unsigned)(b) < 5) ? (1 << ((b) + 7)) : 0) | |
426 | #define FP_CAUSE(b) (((unsigned)(b) < 6) ? (1 << ((b) + 12)) : 0) | |
427 | #else | |
428 | #define FP_FLAGS(b) (1 << ((b) + 2)) | |
429 | #define FP_ENABLE(b) (1 << ((b) + 7)) | |
430 | #define FP_CAUSE(b) (1 << ((b) + 12)) | |
431 | #endif | |
432 | ||
433 | #define FP_FS (1 << 24) /* MIPS III onwards : Flush to Zero */ | |
434 | ||
435 | #define FP_MASK_RM (0x3) | |
436 | #define FP_SH_RM (0) | |
437 | #define FP_RM_NEAREST (0) /* Round to nearest (Round) */ | |
438 | #define FP_RM_TOZERO (1) /* Round to zero (Trunc) */ | |
439 | #define FP_RM_TOPINF (2) /* Round to Plus infinity (Ceil) */ | |
440 | #define FP_RM_TOMINF (3) /* Round to Minus infinity (Floor) */ | |
441 | #define GETRM() (int)((FCSR >> FP_SH_RM) & FP_MASK_RM) | |
442 | ||
443 | /* Slots for delayed register updates. For the moment we just have a | |
444 | fixed number of slots (rather than a more generic, dynamic | |
445 | system). This keeps the simulator fast. However, we only allow for | |
446 | the register update to be delayed for a single instruction | |
447 | cycle. */ | |
448 | #define PSLOTS (5) /* Maximum number of instruction cycles */ | |
4fa134be ILT |
449 | static int pending_in; |
450 | static int pending_out; | |
451 | static int pending_total; | |
452 | static int pending_slot_count[PSLOTS]; | |
453 | static int pending_slot_reg[PSLOTS]; | |
454 | static ut_reg pending_slot_value[PSLOTS]; | |
8bae0a0c | 455 | |
e3d12c65 DE |
456 | /*---------------------------------------------------------------------------*/ |
457 | /*-- GDB simulator interface ------------------------------------------------*/ | |
458 | /*---------------------------------------------------------------------------*/ | |
459 | ||
460 | static void dotrace PARAMS((FILE *tracefh,int type,SIM_ADDR address,int width,char *comment,...)); | |
461 | static void sim_warning PARAMS((char *fmt,...)); | |
462 | extern void sim_error PARAMS((char *fmt,...)); | |
463 | static void ColdReset PARAMS((void)); | |
464 | static int AddressTranslation PARAMS((uword64 vAddr,int IorD,int LorS,uword64 *pAddr,int *CCA,int host,int raw)); | |
53b9417e DE |
465 | static void StoreMemory PARAMS((int CCA,int AccessLength,uword64 MemElem,uword64 MemElem1,uword64 pAddr,uword64 vAddr,int raw)); |
466 | static void LoadMemory PARAMS((uword64*memvalp,uword64*memval1p,int CCA,int AccessLength,uword64 pAddr,uword64 vAddr,int IorD,int raw)); | |
e3d12c65 | 467 | static void SignalException PARAMS((int exception,...)); |
e3d12c65 | 468 | static long getnum PARAMS((char *value)); |
e3d12c65 DE |
469 | extern void sim_set_profile PARAMS((int frequency)); |
470 | static unsigned int power2 PARAMS((unsigned int value)); | |
471 | ||
472 | /*---------------------------------------------------------------------------*/ | |
473 | ||
8bae0a0c JSC |
474 | /* The following are not used for MIPS IV onwards: */ |
475 | #define PENDING_FILL(r,v) {\ | |
f24b7b69 | 476 | /* printf("DBG: FILL BEFORE pending_in = %d, pending_out = %d, pending_total = %d\n",pending_in,pending_out,pending_total); */\ |
8bae0a0c | 477 | if (pending_slot_reg[pending_in] != (LAST_EMBED_REGNUM + 1))\ |
f24b7b69 | 478 | sim_warning("Attempt to over-write pending value");\ |
8bae0a0c JSC |
479 | pending_slot_count[pending_in] = 2;\ |
480 | pending_slot_reg[pending_in] = (r);\ | |
e871dd18 | 481 | pending_slot_value[pending_in] = (uword64)(v);\ |
53b9417e | 482 | /*printf("DBG: FILL reg %d value = 0x%s\n",(r),pr_addr(v));*/\ |
8bae0a0c JSC |
483 | pending_total++;\ |
484 | pending_in++;\ | |
485 | if (pending_in == PSLOTS)\ | |
486 | pending_in = 0;\ | |
f24b7b69 | 487 | /*printf("DBG: FILL AFTER pending_in = %d, pending_out = %d, pending_total = %d\n",pending_in,pending_out,pending_total);*/\ |
8bae0a0c JSC |
488 | } |
489 | ||
4fa134be | 490 | static int LLBIT = 0; |
8bae0a0c JSC |
491 | /* LLBIT = Load-Linked bit. A bit of "virtual" state used by atomic |
492 | read-write instructions. It is set when a linked load occurs. It is | |
493 | tested and cleared by the conditional store. It is cleared (during | |
494 | other CPU operations) when a store to the location would no longer | |
495 | be atomic. In particular, it is cleared by exception return | |
496 | instructions. */ | |
497 | ||
4fa134be ILT |
498 | static int HIACCESS = 0; |
499 | static int LOACCESS = 0; | |
53b9417e DE |
500 | static int HI1ACCESS = 0; |
501 | static int LO1ACCESS = 0; | |
8bae0a0c | 502 | |
6429b296 JW |
503 | /* ??? The 4300 and a few other processors have interlocks on hi/lo register |
504 | reads, and hence do not have this problem. To avoid spurious warnings, | |
505 | we just disable this always. */ | |
506 | #if 1 | |
507 | #define CHECKHILO(s) | |
508 | #else | |
50a2a691 AC |
509 | /* The HIACCESS and LOACCESS counts are used to ensure that |
510 | corruptions caused by using the HI or LO register to close to a | |
511 | following operation are spotted. */ | |
512 | static ut_reg HLPC = 0; | |
8bae0a0c JSC |
513 | /* If either of the preceding two instructions have accessed the HI or |
514 | LO registers, then the values they see should be | |
515 | undefined. However, to keep the simulator world simple, we just let | |
516 | them use the value read and raise a warning to notify the user: */ | |
517 | #define CHECKHILO(s) {\ | |
53b9417e DE |
518 | if ((HIACCESS != 0) || (LOACCESS != 0) || (HI1ACCESS != 0) || (LO1ACCESS != 0))\ |
519 | sim_warning("%s over-writing HI and LO registers values (PC = 0x%s HLPC = 0x%s)\n",(s),pr_addr(PC),pr_addr(HLPC));\ | |
8bae0a0c | 520 | } |
6429b296 | 521 | #endif |
8bae0a0c JSC |
522 | |
523 | /* NOTE: We keep the following status flags as bit values (1 for true, | |
524 | 0 for false). This allows them to be used in binary boolean | |
525 | operations without worrying about what exactly the non-zero true | |
526 | value is. */ | |
527 | ||
528 | /* UserMode */ | |
529 | #define UserMode ((((SR & status_KSU_mask) >> status_KSU_shift) == ksu_user) ? 1 : 0) | |
530 | ||
0049ba7a MA |
531 | /* BigEndianMem */ |
532 | /* Hardware configuration. Affects endianness of LoadMemory and | |
533 | StoreMemory and the endianness of Kernel and Supervisor mode | |
534 | execution. The value is 0 for little-endian; 1 for big-endian. */ | |
50a2a691 AC |
535 | #define BigEndianMem (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) |
536 | /*(state & simBE) ? 1 : 0)*/ | |
0049ba7a | 537 | |
aaff8437 ILT |
538 | /* ByteSwapMem */ |
539 | /* This is true if the host and target have different endianness. */ | |
50a2a691 | 540 | #define ByteSwapMem (CURRENT_TARGET_BYTE_ORDER != CURRENT_HOST_BYTE_ORDER) |
8bae0a0c JSC |
541 | |
542 | /* ReverseEndian */ | |
543 | /* This mode is selected if in User mode with the RE bit being set in | |
544 | SR (Status Register). It reverses the endianness of load and store | |
545 | instructions. */ | |
546 | #define ReverseEndian (((SR & status_RE) && UserMode) ? 1 : 0) | |
547 | ||
548 | /* BigEndianCPU */ | |
549 | /* The endianness for load and store instructions (0=little;1=big). In | |
550 | User mode this endianness may be switched by setting the state_RE | |
551 | bit in the SR register. Thus, BigEndianCPU may be computed as | |
0049ba7a MA |
552 | (BigEndianMem EOR ReverseEndian). */ |
553 | #define BigEndianCPU (BigEndianMem ^ ReverseEndian) /* Already bits */ | |
8bae0a0c JSC |
554 | |
555 | #if !defined(FASTSIM) || defined(PROFILE) | |
556 | /* At the moment these values will be the same, since we do not have | |
557 | access to the pipeline cycle count information from the simulator | |
558 | engine. */ | |
4fa134be ILT |
559 | static unsigned int instruction_fetches = 0; |
560 | static unsigned int instruction_fetch_overflow = 0; | |
8bae0a0c JSC |
561 | #endif |
562 | ||
563 | /* Flags in the "state" variable: */ | |
8bae0a0c JSC |
564 | #define simHALTEX (1 << 2) /* 0 = run; 1 = halt on exception */ |
565 | #define simHALTIN (1 << 3) /* 0 = run; 1 = halt on interrupt */ | |
566 | #define simTRACE (1 << 8) /* 0 = do nothing; 1 = trace address activity */ | |
567 | #define simPROFILE (1 << 9) /* 0 = do nothing; 1 = gather profiling samples */ | |
8bae0a0c JSC |
568 | #define simPCOC0 (1 << 17) /* COC[1] from current */ |
569 | #define simPCOC1 (1 << 18) /* COC[1] from previous */ | |
570 | #define simDELAYSLOT (1 << 24) /* 0 = do nothing; 1 = delay slot entry exists */ | |
571 | #define simSKIPNEXT (1 << 25) /* 0 = do nothing; 1 = skip instruction */ | |
6429b296 | 572 | #define simSIGINT (1 << 28) /* 0 = do nothing; 1 = SIGINT has occured */ |
aaff8437 | 573 | #define simJALDELAYSLOT (1 << 29) /* 1 = in jal delay slot */ |
8bae0a0c | 574 | |
4fa134be | 575 | static unsigned int state = 0; |
8bae0a0c JSC |
576 | |
577 | #define DELAYSLOT() {\ | |
f24b7b69 JSC |
578 | if (state & simDELAYSLOT)\ |
579 | sim_warning("Delay slot already activated (branch in delay slot?)");\ | |
8bae0a0c JSC |
580 | state |= simDELAYSLOT;\ |
581 | } | |
582 | ||
aaff8437 ILT |
583 | #define JALDELAYSLOT() {\ |
584 | DELAYSLOT ();\ | |
585 | state |= simJALDELAYSLOT;\ | |
586 | } | |
587 | ||
8bae0a0c JSC |
588 | #define NULLIFY() {\ |
589 | state &= ~simDELAYSLOT;\ | |
590 | state |= simSKIPNEXT;\ | |
591 | } | |
592 | ||
aaff8437 ILT |
593 | #define INDELAYSLOT() ((state & simDELAYSLOT) != 0) |
594 | #define INJALDELAYSLOT() ((state & simJALDELAYSLOT) != 0) | |
595 | ||
a9f7253f JSC |
596 | #define K0BASE (0x80000000) |
597 | #define K0SIZE (0x20000000) | |
598 | #define K1BASE (0xA0000000) | |
599 | #define K1SIZE (0x20000000) | |
600 | ||
8bae0a0c | 601 | /* Simple run-time monitor support */ |
4fa134be ILT |
602 | static unsigned char *monitor = NULL; |
603 | static ut_reg monitor_base = 0xBFC00000; | |
604 | static unsigned monitor_size = (1 << 11); /* power-of-2 */ | |
8bae0a0c | 605 | |
f24b7b69 JSC |
606 | static char *logfile = NULL; /* logging disabled by default */ |
607 | static FILE *logfh = NULL; | |
608 | ||
8bae0a0c | 609 | #if defined(TRACE) |
4fa134be ILT |
610 | static char *tracefile = "trace.din"; /* default filename for trace log */ |
611 | static FILE *tracefh = NULL; | |
6429b296 | 612 | static void open_trace PARAMS((void)); |
8bae0a0c JSC |
613 | #endif /* TRACE */ |
614 | ||
615 | #if defined(PROFILE) | |
4fa134be ILT |
616 | static unsigned profile_frequency = 256; |
617 | static unsigned profile_nsamples = (128 << 10); | |
618 | static unsigned short *profile_hist = NULL; | |
619 | static ut_reg profile_minpc; | |
620 | static ut_reg profile_maxpc; | |
621 | static int profile_shift = 0; /* address shift amount */ | |
8bae0a0c JSC |
622 | #endif /* PROFILE */ |
623 | ||
2e61a3ad | 624 | |
50a2a691 AC |
625 | static SIM_RC |
626 | mips_option_handler (sd, opt, arg) | |
627 | SIM_DESC sd; | |
628 | int opt; | |
629 | char *arg; | |
2e61a3ad | 630 | { |
50a2a691 AC |
631 | switch (opt) |
632 | { | |
633 | case 'l': | |
634 | if (arg != NULL) { | |
635 | char *tmp; | |
636 | tmp = (char *)malloc(strlen(arg) + 1); | |
637 | if (tmp == NULL) | |
638 | callback->printf_filtered(callback,"Failed to allocate buffer for logfile name \"%s\"\n",optarg); | |
639 | else { | |
640 | strcpy(tmp,optarg); | |
641 | logfile = tmp; | |
642 | } | |
643 | } | |
644 | return SIM_RC_OK; | |
645 | ||
646 | case 'n': /* OK */ | |
647 | callback->printf_filtered(callback,"Explicit model selection not yet available (Ignoring \"%s\")\n",optarg); | |
648 | return SIM_RC_FAIL; | |
649 | ||
650 | case 't': /* ??? */ | |
651 | #if defined(TRACE) | |
652 | /* Eventually the simTRACE flag could be treated as a toggle, to | |
653 | allow external control of the program points being traced | |
654 | (i.e. only from main onwards, excluding the run-time setup, | |
655 | etc.). */ | |
656 | if (arg == NULL) | |
657 | state |= simTRACE; | |
658 | else if (strcmp (arg, "yes") == 0) | |
659 | state |= simTRACE; | |
660 | else if (strcmp (arg, "no") == 0) | |
661 | state &= ~simTRACE; | |
662 | else | |
663 | { | |
664 | fprintf (stderr, "Unreconized trace option `%s'\n", arg); | |
665 | return SIM_RC_FAIL; | |
666 | } | |
667 | return SIM_RC_OK; | |
668 | #else /* !TRACE */ | |
669 | fprintf(stderr,"\ | |
670 | Simulator constructed without tracing support (for performance).\n\ | |
671 | Re-compile simulator with \"-DTRACE\" to enable this option.\n"); | |
672 | return SIM_RC_FAIL; | |
673 | #endif /* !TRACE */ | |
674 | ||
675 | case 'z': | |
676 | #if defined(TRACE) | |
677 | if (optarg != NULL) { | |
678 | char *tmp; | |
679 | tmp = (char *)malloc(strlen(optarg) + 1); | |
680 | if (tmp == NULL) | |
681 | { | |
682 | callback->printf_filtered(callback,"Failed to allocate buffer for tracefile name \"%s\"\n",optarg); | |
683 | return SIM_RC_FAIL; | |
684 | } | |
685 | else { | |
686 | strcpy(tmp,optarg); | |
687 | tracefile = tmp; | |
688 | callback->printf_filtered(callback,"Placing trace information into file \"%s\"\n",tracefile); | |
689 | } | |
690 | } | |
691 | #endif /* TRACE */ | |
692 | return SIM_RC_OK; | |
693 | ||
694 | case 'p': | |
695 | #if defined(PROFILE) | |
696 | state |= simPROFILE; | |
697 | return SIM_RC_OK; | |
698 | #else /* !PROFILE */ | |
699 | fprintf(stderr,"\ | |
700 | Simulator constructed without profiling support (for performance).\n\ | |
701 | Re-compile simulator with \"-DPROFILE\" to enable this option.\n"); | |
702 | return SIM_RC_FAIL; | |
703 | #endif /* !PROFILE */ | |
704 | ||
705 | case 'x': | |
706 | #if defined(PROFILE) | |
707 | profile_nsamples = (unsigned)getnum(optarg); | |
708 | #endif /* PROFILE */ | |
709 | return SIM_RC_OK; | |
710 | ||
711 | case 'y': | |
712 | #if defined(PROFILE) | |
713 | sim_set_profile((int)getnum(optarg)); | |
714 | #endif /* PROFILE */ | |
715 | return SIM_RC_OK; | |
716 | ||
717 | } | |
718 | ||
719 | return SIM_RC_OK; | |
2e61a3ad | 720 | } |
50a2a691 AC |
721 | |
722 | static const OPTION mips_options[] = | |
2e61a3ad | 723 | { |
50a2a691 AC |
724 | { {"log", required_argument, NULL,'l'}, |
725 | 'l', "FILE", "Log file", | |
726 | mips_option_handler }, | |
727 | { {"name", required_argument, NULL,'n'}, | |
728 | 'n', "MODEL", "Select arch model", | |
729 | mips_option_handler }, | |
730 | { {"profile", optional_argument, NULL,'p'}, | |
731 | 'p', "on|off", "Enable profiling", | |
732 | mips_option_handler }, | |
733 | { {"trace", optional_argument, NULL,'t'}, | |
734 | 't', "on|off", "Enable tracing", | |
735 | mips_option_handler }, | |
736 | { {"tracefile",required_argument, NULL,'z'}, | |
737 | 'z', "FILE", "Write trace to file", | |
738 | mips_option_handler }, | |
739 | { {"frequency",required_argument, NULL,'y'}, | |
740 | 'y', "FREQ", "Profile frequency", | |
741 | mips_option_handler }, | |
742 | { {"samples", required_argument, NULL,'x'}, | |
743 | 'y', "SIZE", "Profile sample size", | |
744 | mips_option_handler }, | |
745 | { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL } | |
746 | }; | |
747 | ||
748 | ||
749 | static void | |
750 | interrupt_event (SIM_DESC sd, void *data) | |
2e61a3ad | 751 | { |
50a2a691 | 752 | SignalException (Interrupt); |
2e61a3ad | 753 | } |
f7481d45 | 754 | |
f7481d45 | 755 | |
50a2a691 | 756 | |
8bae0a0c JSC |
757 | /*---------------------------------------------------------------------------*/ |
758 | /*-- GDB simulator interface ------------------------------------------------*/ | |
759 | /*---------------------------------------------------------------------------*/ | |
760 | ||
53b9417e | 761 | SIM_DESC |
50a2a691 | 762 | sim_open (kind,cb,argv) |
87e43259 | 763 | SIM_OPEN_KIND kind; |
50a2a691 | 764 | host_callback *cb; |
53b9417e | 765 | char **argv; |
8bae0a0c | 766 | { |
2e61a3ad | 767 | SIM_DESC sd = &simulator; |
50a2a691 | 768 | |
2e61a3ad AC |
769 | STATE_OPEN_KIND (sd) = kind; |
770 | STATE_MAGIC (sd) = SIM_MAGIC_NUMBER; | |
50a2a691 AC |
771 | STATE_CALLBACK (sd) = cb; |
772 | callback = cb; | |
2e61a3ad AC |
773 | CPU_STATE (STATE_CPU (sd, 0)) = sd; |
774 | ||
50a2a691 AC |
775 | /* FIXME: watchpoints code shouldn't need this */ |
776 | STATE_WATCHPOINTS (sd)->pc = &(PC); | |
777 | STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC); | |
778 | STATE_WATCHPOINTS (sd)->interrupt_handler = interrupt_event; | |
779 | ||
780 | /* memory defaults (unless sim_size was here first) */ | |
781 | if (STATE_MEM_SIZE (sd) == 0) | |
782 | STATE_MEM_SIZE (sd) = (2 << 20); | |
783 | STATE_MEM_BASE (sd) = K1BASE; | |
784 | ||
8bae0a0c JSC |
785 | if (callback == NULL) { |
786 | fprintf(stderr,"SIM Error: sim_open() called without callbacks attached\n"); | |
53b9417e | 787 | return 0; |
8bae0a0c JSC |
788 | } |
789 | ||
50a2a691 AC |
790 | state = 0; |
791 | ||
2e61a3ad AC |
792 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) |
793 | return 0; | |
50a2a691 | 794 | sim_add_option_table (sd, mips_options); |
2e61a3ad | 795 | |
2e61a3ad AC |
796 | /* getopt will print the error message so we just have to exit if this fails. |
797 | FIXME: Hmmm... in the case of gdb we need getopt to call | |
798 | print_filtered. */ | |
799 | if (sim_parse_args (sd, argv) != SIM_RC_OK) | |
800 | { | |
801 | /* Uninstall the modules to avoid memory leaks, | |
802 | file descriptor leaks, etc. */ | |
803 | sim_module_uninstall (sd); | |
804 | return 0; | |
805 | } | |
2e61a3ad AC |
806 | |
807 | if (sim_post_argv_init (sd) != SIM_RC_OK) | |
808 | { | |
809 | /* Uninstall the modules to avoid memory leaks, | |
810 | file descriptor leaks, etc. */ | |
811 | sim_module_uninstall (sd); | |
812 | return 0; | |
813 | } | |
814 | ||
50a2a691 AC |
815 | /* verify assumptions the simulator made about the host type system. |
816 | This macro does not return if there is a problem */ | |
8bae0a0c | 817 | CHECKSIM(); |
8bae0a0c | 818 | |
8bae0a0c JSC |
819 | #if defined(HASFPU) |
820 | /* Check that the host FPU conforms to IEEE 754-1985 for the SINGLE | |
821 | and DOUBLE binary formats. This is a bit nasty, requiring that we | |
822 | trust the explicit manifests held in the source: */ | |
50a2a691 AC |
823 | /* TODO: We need to cope with the simulated target and the host not |
824 | having the same endianness. This will require the high and low | |
825 | words of a (double) to be swapped when converting between the | |
826 | host and the simulated target. */ | |
8bae0a0c | 827 | { |
50a2a691 AC |
828 | union { |
829 | unsigned int i[2]; | |
830 | double d; | |
831 | float f[2]; | |
832 | } s; | |
833 | ||
834 | s.d = (double)523.2939453125; | |
835 | ||
836 | if ((s.i[0] == 0 && (s.f[1] != (float)4.01102924346923828125 | |
837 | || s.i[1] != 0x40805A5A)) | |
838 | || (s.i[1] == 0 && (s.f[0] != (float)4.01102924346923828125 | |
839 | || s.i[0] != 0x40805A5A))) | |
840 | { | |
841 | fprintf(stderr,"The host executing the simulator does not seem to have IEEE 754-1985 std FP\n"); | |
842 | return 0; | |
843 | } | |
8bae0a0c JSC |
844 | } |
845 | #endif /* HASFPU */ | |
846 | ||
847 | /* This is NASTY, in that we are assuming the size of specific | |
848 | registers: */ | |
849 | { | |
850 | int rn; | |
851 | for (rn = 0; (rn < (LAST_EMBED_REGNUM + 1)); rn++) { | |
852 | if (rn < 32) | |
853 | register_widths[rn] = GPRLEN; | |
854 | else if ((rn >= FGRIDX) && (rn < (FGRIDX + 32))) | |
855 | register_widths[rn] = GPRLEN; | |
856 | else if ((rn >= 33) && (rn <= 37)) | |
857 | register_widths[rn] = GPRLEN; | |
858 | else if ((rn == SRIDX) || (rn == FCR0IDX) || (rn == FCR31IDX) || ((rn >= 72) && (rn <= 89))) | |
859 | register_widths[rn] = 32; | |
860 | else | |
861 | register_widths[rn] = 0; | |
862 | } | |
863 | } | |
864 | ||
8bae0a0c | 865 | |
f24b7b69 JSC |
866 | if (logfile != NULL) { |
867 | if (strcmp(logfile,"-") == 0) | |
868 | logfh = stdout; | |
869 | else { | |
870 | logfh = fopen(logfile,"wb+"); | |
871 | if (logfh == NULL) { | |
872 | callback->printf_filtered(callback,"Failed to create file \"%s\", writing log information to stderr.\n",tracefile); | |
873 | logfh = stderr; | |
874 | } | |
875 | } | |
876 | } | |
877 | ||
50a2a691 AC |
878 | /* FIXME: In the future both of these malloc's can be replaced by |
879 | calls to sim-core. */ | |
9d52bcb7 | 880 | |
8bae0a0c JSC |
881 | /* If the host has "mmap" available we could use it to provide a |
882 | very large virtual address space for the simulator, since memory | |
883 | would only be allocated within the "mmap" space as it is | |
884 | accessed. This can also be linked to the architecture specific | |
885 | support, required to simulate the MMU. */ | |
50a2a691 AC |
886 | sim_size(STATE_MEM_SIZE (sd)); |
887 | /* NOTE: The above will also have enabled any profiling state! */ | |
8bae0a0c | 888 | |
50a2a691 | 889 | /* Create the monitor address space as well */ |
8bae0a0c | 890 | monitor = (unsigned char *)calloc(1,monitor_size); |
50a2a691 AC |
891 | if (!monitor) |
892 | fprintf(stderr,"Not enough VM for monitor simulation (%d bytes)\n", | |
893 | monitor_size); | |
8bae0a0c JSC |
894 | |
895 | #if defined(TRACE) | |
6429b296 JW |
896 | if (state & simTRACE) |
897 | open_trace(); | |
8bae0a0c JSC |
898 | #endif /* TRACE */ |
899 | ||
2e61a3ad | 900 | return sd; |
8bae0a0c JSC |
901 | } |
902 | ||
6429b296 JW |
903 | #if defined(TRACE) |
904 | static void | |
905 | open_trace() | |
906 | { | |
907 | tracefh = fopen(tracefile,"wb+"); | |
908 | if (tracefh == NULL) | |
909 | { | |
910 | sim_warning("Failed to create file \"%s\", writing trace information to stderr.",tracefile); | |
911 | tracefh = stderr; | |
912 | } | |
913 | } | |
914 | #endif /* TRACE */ | |
915 | ||
8bae0a0c JSC |
916 | /* For the profile writing, we write the data in the host |
917 | endianness. This unfortunately means we are assuming that the | |
918 | profile file we create is processed on the same host executing the | |
919 | simulator. The gmon.out file format should either have an explicit | |
920 | endianness, or a method of encoding the endianness in the file | |
921 | header. */ | |
922 | static int | |
923 | writeout32(fh,val) | |
924 | FILE *fh; | |
925 | unsigned int val; | |
926 | { | |
927 | char buff[4]; | |
928 | int res = 1; | |
929 | ||
50a2a691 | 930 | if (CURRENT_HOST_BYTE_ORDER == BIG_ENDIAN) { |
8bae0a0c JSC |
931 | buff[3] = ((val >> 0) & 0xFF); |
932 | buff[2] = ((val >> 8) & 0xFF); | |
933 | buff[1] = ((val >> 16) & 0xFF); | |
934 | buff[0] = ((val >> 24) & 0xFF); | |
935 | } else { | |
936 | buff[0] = ((val >> 0) & 0xFF); | |
937 | buff[1] = ((val >> 8) & 0xFF); | |
938 | buff[2] = ((val >> 16) & 0xFF); | |
939 | buff[3] = ((val >> 24) & 0xFF); | |
940 | } | |
941 | if (fwrite(buff,4,1,fh) != 1) { | |
f24b7b69 | 942 | sim_warning("Failed to write 4bytes to the profile file"); |
8bae0a0c JSC |
943 | res = 0; |
944 | } | |
945 | return(res); | |
946 | } | |
947 | ||
948 | static int | |
949 | writeout16(fh,val) | |
950 | FILE *fh; | |
951 | unsigned short val; | |
952 | { | |
953 | char buff[2]; | |
954 | int res = 1; | |
50a2a691 | 955 | if (CURRENT_HOST_BYTE_ORDER == BIG_ENDIAN) { |
8bae0a0c JSC |
956 | buff[1] = ((val >> 0) & 0xFF); |
957 | buff[0] = ((val >> 8) & 0xFF); | |
958 | } else { | |
959 | buff[0] = ((val >> 0) & 0xFF); | |
960 | buff[1] = ((val >> 8) & 0xFF); | |
961 | } | |
962 | if (fwrite(buff,2,1,fh) != 1) { | |
f24b7b69 | 963 | sim_warning("Failed to write 2bytes to the profile file"); |
8bae0a0c JSC |
964 | res = 0; |
965 | } | |
966 | return(res); | |
967 | } | |
968 | ||
969 | void | |
53b9417e DE |
970 | sim_close (sd, quitting) |
971 | SIM_DESC sd; | |
8bae0a0c JSC |
972 | int quitting; |
973 | { | |
974 | #ifdef DEBUG | |
975 | printf("DBG: sim_close: entered (quitting = %d)\n",quitting); | |
976 | #endif | |
977 | ||
978 | /* Cannot assume sim_kill() has been called */ | |
979 | /* "quitting" is non-zero if we cannot hang on errors */ | |
980 | ||
981 | /* Ensure that any resources allocated through the callback | |
982 | mechanism are released: */ | |
983 | callback->shutdown(callback); | |
984 | ||
985 | #if defined(PROFILE) | |
986 | if ((state & simPROFILE) && (profile_hist != NULL)) { | |
8bae0a0c | 987 | FILE *pf = fopen("gmon.out","wb"); |
e3d12c65 | 988 | unsigned loop; |
8bae0a0c JSC |
989 | |
990 | if (pf == NULL) | |
f24b7b69 | 991 | sim_warning("Failed to open \"gmon.out\" profile file"); |
8bae0a0c JSC |
992 | else { |
993 | int ok; | |
994 | #ifdef DEBUG | |
53b9417e DE |
995 | printf("DBG: minpc = 0x%s\n",pr_addr(profile_minpc)); |
996 | printf("DBG: maxpc = 0x%s\n",pr_addr(profile_maxpc)); | |
8bae0a0c JSC |
997 | #endif /* DEBUG */ |
998 | ok = writeout32(pf,(unsigned int)profile_minpc); | |
999 | if (ok) | |
1000 | ok = writeout32(pf,(unsigned int)profile_maxpc); | |
1001 | if (ok) | |
1002 | ok = writeout32(pf,(profile_nsamples * 2) + 12); /* size of sample buffer (+ header) */ | |
1003 | #ifdef DEBUG | |
1004 | printf("DBG: nsamples = %d (size = 0x%08X)\n",profile_nsamples,((profile_nsamples * 2) + 12)); | |
1005 | #endif /* DEBUG */ | |
1006 | for (loop = 0; (ok && (loop < profile_nsamples)); loop++) { | |
1007 | ok = writeout16(pf,profile_hist[loop]); | |
1008 | if (!ok) | |
1009 | break; | |
1010 | } | |
1011 | ||
1012 | fclose(pf); | |
1013 | } | |
1014 | ||
1015 | free(profile_hist); | |
1016 | profile_hist = NULL; | |
1017 | state &= ~simPROFILE; | |
1018 | } | |
1019 | #endif /* PROFILE */ | |
1020 | ||
1021 | #if defined(TRACE) | |
e3d12c65 | 1022 | if (tracefh != NULL && tracefh != stderr) |
8bae0a0c | 1023 | fclose(tracefh); |
e3d12c65 | 1024 | tracefh = NULL; |
8bae0a0c JSC |
1025 | state &= ~simTRACE; |
1026 | #endif /* TRACE */ | |
1027 | ||
f24b7b69 JSC |
1028 | if (logfh != NULL && logfh != stdout && logfh != stderr) |
1029 | fclose(logfh); | |
1030 | logfh = NULL; | |
1031 | ||
50a2a691 AC |
1032 | if (STATE_MEMORY (sd) != NULL) |
1033 | free(STATE_MEMORY (sd)); /* cfree not available on all hosts */ | |
1034 | STATE_MEMORY (sd) = NULL; | |
8bae0a0c JSC |
1035 | |
1036 | return; | |
1037 | } | |
1038 | ||
8bae0a0c JSC |
1039 | |
1040 | int | |
53b9417e DE |
1041 | sim_write (sd,addr,buffer,size) |
1042 | SIM_DESC sd; | |
8bae0a0c JSC |
1043 | SIM_ADDR addr; |
1044 | unsigned char *buffer; | |
1045 | int size; | |
1046 | { | |
1047 | int index = size; | |
e871dd18 | 1048 | uword64 vaddr = (uword64)addr; |
8bae0a0c JSC |
1049 | |
1050 | /* Return the number of bytes written, or zero if error. */ | |
1051 | #ifdef DEBUG | |
53b9417e | 1052 | callback->printf_filtered(callback,"sim_write(0x%s,buffer,%d);\n",pr_addr(addr),size); |
8bae0a0c JSC |
1053 | #endif |
1054 | ||
1055 | /* We provide raw read and write routines, since we do not want to | |
1056 | count the GDB memory accesses in our statistics gathering. */ | |
1057 | ||
1058 | /* There is a lot of code duplication in the individual blocks | |
1059 | below, but the variables are declared locally to a block to give | |
1060 | the optimiser the best chance of improving the code. We have to | |
1061 | perform slow byte reads from the host memory, to ensure that we | |
1062 | get the data into the correct endianness for the (simulated) | |
1063 | target memory world. */ | |
1064 | ||
1065 | /* Mask count to get odd byte, odd halfword, and odd word out of the | |
1066 | way. We can then perform doubleword transfers to and from the | |
1067 | simulator memory for optimum performance. */ | |
1068 | if (index && (index & 1)) { | |
e871dd18 | 1069 | uword64 paddr; |
8bae0a0c JSC |
1070 | int cca; |
1071 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isRAW)) { | |
e871dd18 | 1072 | uword64 value = ((uword64)(*buffer++)); |
53b9417e | 1073 | StoreMemory(cca,AccessLength_BYTE,value,0,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1074 | } |
1075 | vaddr++; | |
1076 | index &= ~1; /* logical operations usually quicker than arithmetic on RISC systems */ | |
1077 | } | |
1078 | if (index && (index & 2)) { | |
e871dd18 | 1079 | uword64 paddr; |
8bae0a0c JSC |
1080 | int cca; |
1081 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isRAW)) { | |
e871dd18 | 1082 | uword64 value; |
8bae0a0c JSC |
1083 | /* We need to perform the following magic to ensure that that |
1084 | bytes are written into same byte positions in the target memory | |
1085 | world, regardless of the endianness of the host. */ | |
0049ba7a | 1086 | if (BigEndianMem) { |
e871dd18 JSC |
1087 | value = ((uword64)(*buffer++) << 8); |
1088 | value |= ((uword64)(*buffer++) << 0); | |
8bae0a0c | 1089 | } else { |
e871dd18 JSC |
1090 | value = ((uword64)(*buffer++) << 0); |
1091 | value |= ((uword64)(*buffer++) << 8); | |
8bae0a0c | 1092 | } |
53b9417e | 1093 | StoreMemory(cca,AccessLength_HALFWORD,value,0,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1094 | } |
1095 | vaddr += 2; | |
1096 | index &= ~2; | |
1097 | } | |
1098 | if (index && (index & 4)) { | |
e871dd18 | 1099 | uword64 paddr; |
8bae0a0c JSC |
1100 | int cca; |
1101 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isRAW)) { | |
e871dd18 | 1102 | uword64 value; |
0049ba7a | 1103 | if (BigEndianMem) { |
e871dd18 JSC |
1104 | value = ((uword64)(*buffer++) << 24); |
1105 | value |= ((uword64)(*buffer++) << 16); | |
1106 | value |= ((uword64)(*buffer++) << 8); | |
1107 | value |= ((uword64)(*buffer++) << 0); | |
8bae0a0c | 1108 | } else { |
e871dd18 JSC |
1109 | value = ((uword64)(*buffer++) << 0); |
1110 | value |= ((uword64)(*buffer++) << 8); | |
1111 | value |= ((uword64)(*buffer++) << 16); | |
1112 | value |= ((uword64)(*buffer++) << 24); | |
8bae0a0c | 1113 | } |
53b9417e | 1114 | StoreMemory(cca,AccessLength_WORD,value,0,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1115 | } |
1116 | vaddr += 4; | |
1117 | index &= ~4; | |
1118 | } | |
1119 | for (;index; index -= 8) { | |
e871dd18 | 1120 | uword64 paddr; |
8bae0a0c JSC |
1121 | int cca; |
1122 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isRAW)) { | |
e871dd18 | 1123 | uword64 value; |
0049ba7a | 1124 | if (BigEndianMem) { |
e871dd18 JSC |
1125 | value = ((uword64)(*buffer++) << 56); |
1126 | value |= ((uword64)(*buffer++) << 48); | |
1127 | value |= ((uword64)(*buffer++) << 40); | |
1128 | value |= ((uword64)(*buffer++) << 32); | |
1129 | value |= ((uword64)(*buffer++) << 24); | |
1130 | value |= ((uword64)(*buffer++) << 16); | |
1131 | value |= ((uword64)(*buffer++) << 8); | |
1132 | value |= ((uword64)(*buffer++) << 0); | |
8bae0a0c | 1133 | } else { |
e871dd18 JSC |
1134 | value = ((uword64)(*buffer++) << 0); |
1135 | value |= ((uword64)(*buffer++) << 8); | |
1136 | value |= ((uword64)(*buffer++) << 16); | |
1137 | value |= ((uword64)(*buffer++) << 24); | |
1138 | value |= ((uword64)(*buffer++) << 32); | |
1139 | value |= ((uword64)(*buffer++) << 40); | |
1140 | value |= ((uword64)(*buffer++) << 48); | |
1141 | value |= ((uword64)(*buffer++) << 56); | |
8bae0a0c | 1142 | } |
53b9417e | 1143 | StoreMemory(cca,AccessLength_DOUBLEWORD,value,0,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1144 | } |
1145 | vaddr += 8; | |
1146 | } | |
1147 | ||
1148 | return(size); | |
1149 | } | |
1150 | ||
1151 | int | |
53b9417e DE |
1152 | sim_read (sd,addr,buffer,size) |
1153 | SIM_DESC sd; | |
8bae0a0c JSC |
1154 | SIM_ADDR addr; |
1155 | unsigned char *buffer; | |
1156 | int size; | |
1157 | { | |
1158 | int index; | |
1159 | ||
1160 | /* Return the number of bytes read, or zero if error. */ | |
1161 | #ifdef DEBUG | |
53b9417e | 1162 | callback->printf_filtered(callback,"sim_read(0x%s,buffer,%d);\n",pr_addr(addr),size); |
8bae0a0c JSC |
1163 | #endif /* DEBUG */ |
1164 | ||
1165 | /* TODO: Perform same optimisation as the sim_write() code | |
1166 | above. NOTE: This will require a bit more work since we will need | |
1167 | to ensure that the source physical address is doubleword aligned | |
1168 | before, and then deal with trailing bytes. */ | |
1169 | for (index = 0; (index < size); index++) { | |
e871dd18 | 1170 | uword64 vaddr,paddr,value; |
8bae0a0c | 1171 | int cca; |
e871dd18 | 1172 | vaddr = (uword64)addr + index; |
8bae0a0c | 1173 | if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&cca,isTARGET,isRAW)) { |
53b9417e | 1174 | LoadMemory(&value,NULL,cca,AccessLength_BYTE,paddr,vaddr,isDATA,isRAW); |
8bae0a0c JSC |
1175 | buffer[index] = (unsigned char)(value&0xFF); |
1176 | } else | |
1177 | break; | |
1178 | } | |
1179 | ||
1180 | return(index); | |
1181 | } | |
1182 | ||
1183 | void | |
53b9417e DE |
1184 | sim_store_register (sd,rn,memory) |
1185 | SIM_DESC sd; | |
8bae0a0c JSC |
1186 | int rn; |
1187 | unsigned char *memory; | |
1188 | { | |
50a2a691 AC |
1189 | /* NOTE: gdb (the client) stores registers in target byte order |
1190 | while the simulator uses host byte order */ | |
8bae0a0c | 1191 | #ifdef DEBUG |
53b9417e | 1192 | callback->printf_filtered(callback,"sim_store_register(%d,*memory=0x%s);\n",rn,pr_addr(*((SIM_ADDR *)memory))); |
8bae0a0c JSC |
1193 | #endif /* DEBUG */ |
1194 | ||
1195 | /* Unfortunately this suffers from the same problem as the register | |
1196 | numbering one. We need to know what the width of each logical | |
1197 | register number is for the architecture being simulated. */ | |
50a2a691 | 1198 | |
8bae0a0c | 1199 | if (register_widths[rn] == 0) |
50a2a691 AC |
1200 | sim_warning("Invalid register width for %d (register store ignored)",rn); |
1201 | else | |
1202 | { | |
1203 | if (register_widths[rn] == 32) | |
1204 | registers[rn] = T2H_4 (*(unsigned int*)memory); | |
1205 | else | |
1206 | registers[rn] = T2H_8 (*(uword64*)memory); | |
1207 | } | |
8bae0a0c JSC |
1208 | |
1209 | return; | |
1210 | } | |
1211 | ||
1212 | void | |
53b9417e DE |
1213 | sim_fetch_register (sd,rn,memory) |
1214 | SIM_DESC sd; | |
8bae0a0c JSC |
1215 | int rn; |
1216 | unsigned char *memory; | |
1217 | { | |
50a2a691 AC |
1218 | /* NOTE: gdb (the client) stores registers in target byte order |
1219 | while the simulator uses host byte order */ | |
8bae0a0c | 1220 | #ifdef DEBUG |
53b9417e | 1221 | callback->printf_filtered(callback,"sim_fetch_register(%d=0x%s,mem) : place simulator registers into memory\n",rn,pr_addr(registers[rn])); |
8bae0a0c JSC |
1222 | #endif /* DEBUG */ |
1223 | ||
1224 | if (register_widths[rn] == 0) | |
50a2a691 AC |
1225 | sim_warning("Invalid register width for %d (register fetch ignored)",rn); |
1226 | else | |
1227 | { | |
1228 | if (register_widths[rn] == 32) | |
1229 | *((unsigned int *)memory) = H2T_4 ((unsigned int)(registers[rn] & 0xFFFFFFFF)); | |
1230 | else /* 64bit register */ | |
1231 | *((uword64 *)memory) = H2T_8 (registers[rn]); | |
8bae0a0c | 1232 | } |
50a2a691 | 1233 | |
8bae0a0c JSC |
1234 | return; |
1235 | } | |
50a2a691 | 1236 | |
8bae0a0c JSC |
1237 | |
1238 | void | |
53b9417e DE |
1239 | sim_info (sd,verbose) |
1240 | SIM_DESC sd; | |
8bae0a0c JSC |
1241 | int verbose; |
1242 | { | |
1243 | /* Accessed from the GDB "info files" command: */ | |
1244 | ||
1245 | callback->printf_filtered(callback,"MIPS %d-bit simulator\n",(PROCESSOR_64BIT ? 64 : 32)); | |
1246 | ||
50a2a691 AC |
1247 | callback->printf_filtered(callback,"%s endian memory model\n", |
1248 | (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN | |
1249 | ? "Big" : "Little")); | |
8bae0a0c | 1250 | |
50a2a691 AC |
1251 | callback->printf_filtered(callback,"0x%08X bytes of memory at 0x%s\n", |
1252 | STATE_MEM_SIZE (sd), | |
1253 | pr_addr (STATE_MEM_BASE (sd))); | |
8bae0a0c JSC |
1254 | |
1255 | #if !defined(FASTSIM) | |
a9f7253f JSC |
1256 | if (instruction_fetch_overflow != 0) |
1257 | callback->printf_filtered(callback,"Instruction fetches = 0x%08X%08X\n",instruction_fetch_overflow,instruction_fetches); | |
1258 | else | |
1259 | callback->printf_filtered(callback,"Instruction fetches = %d\n",instruction_fetches); | |
50a2a691 AC |
1260 | callback->printf_filtered(callback,"Pipeline ticks = %ld\n", |
1261 | (long) sim_events_time (sd)); | |
8bae0a0c JSC |
1262 | /* It would be a useful feature, if when performing multi-cycle |
1263 | simulations (rather than single-stepping) we keep the start and | |
1264 | end times of the execution, so that we can give a performance | |
1265 | figure for the simulator. */ | |
1266 | #endif /* !FASTSIM */ | |
1267 | ||
1268 | /* print information pertaining to MIPS ISA and architecture being simulated */ | |
1269 | /* things that may be interesting */ | |
1270 | /* instructions executed - if available */ | |
1271 | /* cycles executed - if available */ | |
1272 | /* pipeline stalls - if available */ | |
1273 | /* virtual time taken */ | |
1274 | /* profiling size */ | |
1275 | /* profiling frequency */ | |
1276 | /* profile minpc */ | |
1277 | /* profile maxpc */ | |
1278 | ||
1279 | return; | |
1280 | } | |
1281 | ||
9d52bcb7 DE |
1282 | SIM_RC |
1283 | sim_load (sd,prog,abfd,from_tty) | |
53b9417e | 1284 | SIM_DESC sd; |
8bae0a0c | 1285 | char *prog; |
9d52bcb7 | 1286 | bfd *abfd; |
8bae0a0c JSC |
1287 | int from_tty; |
1288 | { | |
9d52bcb7 DE |
1289 | bfd *prog_bfd; |
1290 | ||
2e61a3ad | 1291 | prog_bfd = sim_load_file (sd, |
50a2a691 | 1292 | STATE_MY_NAME (sd), |
2e61a3ad AC |
1293 | callback, |
1294 | prog, | |
1295 | /* pass NULL for abfd, we always open our own */ | |
1296 | NULL, | |
1297 | STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG); | |
9d52bcb7 DE |
1298 | if (prog_bfd == NULL) |
1299 | return SIM_RC_FAIL; | |
2e61a3ad | 1300 | sim_analyze_program (sd, prog_bfd); |
50a2a691 AC |
1301 | |
1302 | /* Configure/verify the target byte order and other runtime | |
1303 | configuration options */ | |
1304 | sim_config (sd, PREFERED_TARGET_BYTE_ORDER(prog_bfd)); | |
1305 | ||
1306 | /* (re) Write the monitor trap address handlers into the monitor | |
1307 | (eeprom) address space. This can only be done once the target | |
1308 | endianness has been determined. */ | |
1309 | { | |
1310 | unsigned loop; | |
1311 | /* Entry into the IDT monitor is via fixed address vectors, and | |
1312 | not using machine instructions. To avoid clashing with use of | |
1313 | the MIPS TRAP system, we place our own (simulator specific) | |
1314 | "undefined" instructions into the relevant vector slots. */ | |
1315 | for (loop = 0; (loop < monitor_size); loop += 4) { | |
1316 | uword64 vaddr = (monitor_base + loop); | |
1317 | uword64 paddr; | |
1318 | int cca; | |
1319 | if (AddressTranslation(vaddr, isDATA, isSTORE, &paddr, &cca, isTARGET, isRAW)) | |
1320 | StoreMemory(cca, AccessLength_WORD, | |
1321 | (RSVD_INSTRUCTION | (((loop >> 2) & RSVD_INSTRUCTION_ARG_MASK) << RSVD_INSTRUCTION_ARG_SHIFT)), | |
1322 | 0, paddr, vaddr, isRAW); | |
1323 | } | |
1324 | /* The PMON monitor uses the same address space, but rather than | |
1325 | branching into it the address of a routine is loaded. We can | |
1326 | cheat for the moment, and direct the PMON routine to IDT style | |
1327 | instructions within the monitor space. This relies on the IDT | |
1328 | monitor not using the locations from 0xBFC00500 onwards as its | |
1329 | entry points.*/ | |
1330 | for (loop = 0; (loop < 24); loop++) | |
1331 | { | |
1332 | uword64 vaddr = (monitor_base + 0x500 + (loop * 4)); | |
1333 | uword64 paddr; | |
1334 | int cca; | |
1335 | unsigned int value = ((0x500 - 8) / 8); /* default UNDEFINED reason code */ | |
1336 | switch (loop) | |
1337 | { | |
1338 | case 0: /* read */ | |
1339 | value = 7; | |
1340 | break; | |
1341 | ||
1342 | case 1: /* write */ | |
1343 | value = 8; | |
1344 | break; | |
1345 | ||
1346 | case 2: /* open */ | |
1347 | value = 6; | |
1348 | break; | |
1349 | ||
1350 | case 3: /* close */ | |
1351 | value = 10; | |
1352 | break; | |
1353 | ||
1354 | case 5: /* printf */ | |
1355 | value = ((0x500 - 16) / 8); /* not an IDT reason code */ | |
1356 | break; | |
1357 | ||
1358 | case 8: /* cliexit */ | |
1359 | value = 17; | |
1360 | break; | |
1361 | ||
1362 | case 11: /* flush_cache */ | |
1363 | value = 28; | |
1364 | break; | |
1365 | } | |
1366 | /* FIXME - should monitor_base be SIM_ADDR?? */ | |
1367 | value = ((unsigned int)monitor_base + (value * 8)); | |
1368 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isRAW)) | |
1369 | StoreMemory(cca,AccessLength_WORD,value,0,paddr,vaddr,isRAW); | |
1370 | else | |
1371 | sim_error("Failed to write to monitor space 0x%s",pr_addr(vaddr)); | |
1372 | ||
1373 | /* The LSI MiniRISC PMON has its vectors at 0x200, not 0x500. */ | |
1374 | vaddr -= 0x300; | |
1375 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isRAW)) | |
1376 | StoreMemory(cca,AccessLength_WORD,value,0,paddr,vaddr,isRAW); | |
1377 | else | |
1378 | sim_error("Failed to write to monitor space 0x%s",pr_addr(vaddr)); | |
1379 | } | |
1380 | } | |
1381 | ||
9d52bcb7 | 1382 | return SIM_RC_OK; |
8bae0a0c JSC |
1383 | } |
1384 | ||
9d52bcb7 DE |
1385 | SIM_RC |
1386 | sim_create_inferior (sd, argv,env) | |
53b9417e | 1387 | SIM_DESC sd; |
8bae0a0c JSC |
1388 | char **argv; |
1389 | char **env; | |
1390 | { | |
50a2a691 | 1391 | |
8bae0a0c | 1392 | #ifdef DEBUG |
9d52bcb7 DE |
1393 | printf("DBG: sim_create_inferior entered: start_address = 0x%s\n", |
1394 | pr_addr(PC)); | |
8bae0a0c JSC |
1395 | #endif /* DEBUG */ |
1396 | ||
50a2a691 AC |
1397 | ColdReset(); |
1398 | /* If we were providing a more complete I/O, co-processor or memory | |
1399 | simulation, we should perform any "device" initialisation at this | |
1400 | point. This can include pre-loading memory areas with particular | |
1401 | patterns (e.g. simulating ROM monitors). */ | |
1402 | ||
2e61a3ad AC |
1403 | #if 1 |
1404 | PC = (uword64) STATE_START_ADDR(sd); | |
1405 | #else | |
1406 | /* TODO: Sort this properly. SIM_ADDR may already be a 64bit value: */ | |
1407 | PC = SIGNEXTEND(bfd_get_start_address(prog_bfd),32); | |
1408 | #endif | |
1409 | ||
8bae0a0c JSC |
1410 | /* Prepare to execute the program to be simulated */ |
1411 | /* argv and env are NULL terminated lists of pointers */ | |
1412 | ||
8bae0a0c | 1413 | if (argv || env) { |
f24b7b69 | 1414 | #if 0 /* def DEBUG */ |
8bae0a0c | 1415 | callback->printf_filtered(callback,"sim_create_inferior() : passed arguments ignored\n"); |
8bae0a0c JSC |
1416 | { |
1417 | char **cptr; | |
1418 | for (cptr = argv; (cptr && *cptr); cptr++) | |
1419 | printf("DBG: arg \"%s\"\n",*cptr); | |
1420 | } | |
1421 | #endif /* DEBUG */ | |
1422 | /* We should really place the argv slot values into the argument | |
1423 | registers, and onto the stack as required. However, this | |
1424 | assumes that we have a stack defined, which is not necessarily | |
1425 | true at the moment. */ | |
1426 | } | |
1427 | ||
9d52bcb7 | 1428 | return SIM_RC_OK; |
8bae0a0c JSC |
1429 | } |
1430 | ||
1431 | void | |
53b9417e DE |
1432 | sim_kill (sd) |
1433 | SIM_DESC sd; | |
8bae0a0c JSC |
1434 | { |
1435 | #if 1 | |
1436 | /* This routine should be for terminating any existing simulation | |
1437 | thread. Since we are single-threaded only at the moment, this is | |
1438 | not an issue. It should *NOT* be used to terminate the | |
1439 | simulator. */ | |
1440 | #else /* do *NOT* call sim_close */ | |
53b9417e | 1441 | sim_close(sd, 1); /* Do not hang on errors */ |
8bae0a0c JSC |
1442 | /* This would also be the point where any memory mapped areas used |
1443 | by the simulator should be released. */ | |
1444 | #endif | |
1445 | return; | |
1446 | } | |
1447 | ||
8bae0a0c JSC |
1448 | typedef enum {e_terminate,e_help,e_setmemsize,e_reset} e_cmds; |
1449 | ||
1450 | static struct t_sim_command { | |
1451 | e_cmds id; | |
1452 | const char *name; | |
1453 | const char *help; | |
1454 | } sim_commands[] = { | |
1455 | {e_help, "help", ": Show MIPS simulator private commands"}, | |
1456 | {e_setmemsize,"set-memory-size","<n> : Specify amount of memory simulated"}, | |
1457 | {e_reset, "reset-system", ": Reset the simulated processor"}, | |
1458 | {e_terminate, NULL} | |
1459 | }; | |
1460 | ||
1461 | void | |
53b9417e DE |
1462 | sim_do_command (sd,cmd) |
1463 | SIM_DESC sd; | |
8bae0a0c JSC |
1464 | char *cmd; |
1465 | { | |
1466 | struct t_sim_command *cptr; | |
1467 | ||
8b554809 JSC |
1468 | if (callback == NULL) { |
1469 | fprintf(stderr,"Simulator not enabled: \"target sim\" should be used to activate\n"); | |
1470 | return; | |
1471 | } | |
1472 | ||
8bae0a0c JSC |
1473 | if (!(cmd && *cmd != '\0')) |
1474 | cmd = "help"; | |
1475 | ||
1476 | /* NOTE: Accessed from the GDB "sim" commmand: */ | |
1477 | for (cptr = sim_commands; cptr && cptr->name; cptr++) | |
1478 | if (strncmp(cmd,cptr->name,strlen(cptr->name)) == 0) { | |
1479 | cmd += strlen(cptr->name); | |
1480 | switch (cptr->id) { | |
1481 | case e_help: /* no arguments */ | |
1482 | { /* no arguments */ | |
1483 | struct t_sim_command *lptr; | |
1484 | callback->printf_filtered(callback,"List of MIPS simulator commands:\n"); | |
1485 | for (lptr = sim_commands; lptr->name; lptr++) | |
1486 | callback->printf_filtered(callback,"%s %s\n",lptr->name,lptr->help); | |
1487 | } | |
1488 | break; | |
1489 | ||
1490 | case e_setmemsize: /* memory size argument */ | |
1491 | { | |
1492 | unsigned int newsize = (unsigned int)getnum(cmd); | |
50a2a691 | 1493 | sim_size(newsize); |
8bae0a0c JSC |
1494 | } |
1495 | break; | |
1496 | ||
1497 | case e_reset: /* no arguments */ | |
1498 | ColdReset(); | |
1499 | /* NOTE: See the comments in sim_open() relating to device | |
1500 | initialisation. */ | |
1501 | break; | |
1502 | ||
1503 | default: | |
1504 | callback->printf_filtered(callback,"FATAL: Matched \"%s\", but failed to match command id %d.\n",cmd,cptr->id); | |
1505 | break; | |
1506 | } | |
1507 | break; | |
1508 | } | |
1509 | ||
1510 | if (!(cptr->name)) | |
1511 | callback->printf_filtered(callback,"Error: \"%s\" is not a valid MIPS simulator command.\n",cmd); | |
1512 | ||
1513 | return; | |
1514 | } | |
1515 | ||
1516 | /*---------------------------------------------------------------------------*/ | |
1517 | /* NOTE: The following routines do not seem to be used by GDB at the | |
1518 | moment. However, they may be useful to the standalone simulator | |
1519 | world. */ | |
1520 | ||
1521 | ||
1522 | /* The profiling format is described in the "gmon_out.h" header file */ | |
1523 | void | |
1524 | sim_set_profile (n) | |
1525 | int n; | |
1526 | { | |
1527 | #if defined(PROFILE) | |
1528 | profile_frequency = n; | |
1529 | state |= simPROFILE; | |
1530 | #endif /* PROFILE */ | |
1531 | return; | |
1532 | } | |
1533 | ||
1534 | void | |
1535 | sim_set_profile_size (n) | |
1536 | int n; | |
1537 | { | |
50a2a691 | 1538 | SIM_DESC sd = &simulator; |
8bae0a0c JSC |
1539 | #if defined(PROFILE) |
1540 | if (state & simPROFILE) { | |
1541 | int bsize; | |
1542 | ||
1543 | /* Since we KNOW that the memory banks are a power-of-2 in size: */ | |
1544 | profile_nsamples = power2(n); | |
50a2a691 AC |
1545 | profile_minpc = STATE_MEM_BASE (sd); |
1546 | profile_maxpc = (STATE_MEM_BASE (sd) + STATE_MEM_SIZE (sd)); | |
8bae0a0c JSC |
1547 | |
1548 | /* Just in-case we are sampling every address: NOTE: The shift | |
1549 | right of 2 is because we only have word-aligned PC addresses. */ | |
50a2a691 AC |
1550 | if (profile_nsamples > (STATE_MEM_SIZE (sd) >> 2)) |
1551 | profile_nsamples = (STATE_MEM_SIZE (sd) >> 2); | |
8bae0a0c JSC |
1552 | |
1553 | /* Since we are dealing with power-of-2 values: */ | |
50a2a691 | 1554 | profile_shift = (((STATE_MEM_SIZE (sd) >> 2) / profile_nsamples) - 1); |
8bae0a0c JSC |
1555 | |
1556 | bsize = (profile_nsamples * sizeof(unsigned short)); | |
1557 | if (profile_hist == NULL) | |
1558 | profile_hist = (unsigned short *)calloc(64,(bsize / 64)); | |
1559 | else | |
1560 | profile_hist = (unsigned short *)realloc(profile_hist,bsize); | |
1561 | if (profile_hist == NULL) { | |
f24b7b69 | 1562 | sim_warning("Failed to allocate VM for profiling buffer (0x%08X bytes)",bsize); |
8bae0a0c JSC |
1563 | state &= ~simPROFILE; |
1564 | } | |
1565 | } | |
1566 | #endif /* PROFILE */ | |
1567 | ||
1568 | return; | |
1569 | } | |
1570 | ||
1571 | void | |
50a2a691 | 1572 | sim_size(newsize) |
87e43259 | 1573 | int newsize; |
8bae0a0c | 1574 | { |
50a2a691 | 1575 | SIM_DESC sd = &simulator; |
8bae0a0c JSC |
1576 | char *new; |
1577 | /* Used by "run", and internally, to set the simulated memory size */ | |
f24b7b69 | 1578 | if (newsize == 0) { |
50a2a691 | 1579 | callback->printf_filtered(callback,"Zero not valid: Memory size still 0x%08X bytes\n",STATE_MEM_SIZE (sd)); |
f24b7b69 JSC |
1580 | return; |
1581 | } | |
8bae0a0c | 1582 | newsize = power2(newsize); |
50a2a691 AC |
1583 | if (STATE_MEMORY (sd) == NULL) |
1584 | new = (char *)calloc(64,(STATE_MEM_SIZE (sd) / 64)); | |
8bae0a0c | 1585 | else |
50a2a691 | 1586 | new = (char *)realloc(STATE_MEMORY (sd),newsize); |
8bae0a0c | 1587 | if (new == NULL) { |
50a2a691 AC |
1588 | if (STATE_MEMORY (sd) == NULL) |
1589 | sim_error("Not enough VM for simulation memory of 0x%08X bytes",STATE_MEM_SIZE (sd)); | |
8bae0a0c | 1590 | else |
50a2a691 | 1591 | sim_warning("Failed to resize memory (still 0x%08X bytes)",STATE_MEM_SIZE (sd)); |
8bae0a0c | 1592 | } else { |
50a2a691 AC |
1593 | STATE_MEM_SIZE (sd) = (unsigned)newsize; |
1594 | STATE_MEMORY (sd) = new; | |
8bae0a0c JSC |
1595 | #if defined(PROFILE) |
1596 | /* Ensure that we sample across the new memory range */ | |
1597 | sim_set_profile_size(profile_nsamples); | |
1598 | #endif /* PROFILE */ | |
1599 | } | |
1600 | ||
1601 | return; | |
1602 | } | |
1603 | ||
1604 | int | |
53b9417e DE |
1605 | sim_trace(sd) |
1606 | SIM_DESC sd; | |
8bae0a0c | 1607 | { |
2e61a3ad AC |
1608 | sim_io_eprintf (sd, "Sim trace not supported"); |
1609 | #if 0 | |
8bae0a0c JSC |
1610 | /* This routine is called by the "run" program, when detailed |
1611 | execution information is required. Rather than executing a single | |
1612 | instruction, and looping around externally... we just start | |
1613 | simulating, returning TRUE when the simulator stops (for whatever | |
1614 | reason). */ | |
1615 | ||
1616 | #if defined(TRACE) | |
1617 | /* Ensure tracing is enabled, if available */ | |
6429b296 JW |
1618 | if (tracefh == NULL) |
1619 | { | |
1620 | open_trace(); | |
1621 | state |= simTRACE; | |
1622 | } | |
8bae0a0c JSC |
1623 | #endif /* TRACE */ |
1624 | ||
2e61a3ad | 1625 | #if 0 |
8bae0a0c | 1626 | state &= ~(simSTOP | simSTEP); /* execute until event */ |
2e61a3ad | 1627 | #endif |
8bae0a0c JSC |
1628 | state |= (simHALTEX | simHALTIN); /* treat interrupt event as exception */ |
1629 | /* Start executing instructions from the current state (set | |
1630 | explicitly by register updates, or by sim_create_inferior): */ | |
1631 | simulate(); | |
1632 | ||
2e61a3ad | 1633 | #endif |
8bae0a0c JSC |
1634 | return(1); |
1635 | } | |
1636 | ||
1637 | /*---------------------------------------------------------------------------*/ | |
1638 | /*-- Private simulator support interface ------------------------------------*/ | |
1639 | /*---------------------------------------------------------------------------*/ | |
1640 | ||
a9f7253f | 1641 | /* Simple monitor interface (currently setup for the IDT and PMON monitors) */ |
8bae0a0c JSC |
1642 | static void |
1643 | sim_monitor(reason) | |
1644 | unsigned int reason; | |
1645 | { | |
2e61a3ad | 1646 | SIM_DESC sd = &simulator; |
53b9417e DE |
1647 | #ifdef DEBUG |
1648 | printf("DBG: sim_monitor: entered (reason = %d)\n",reason); | |
1649 | #endif /* DEBUG */ | |
1650 | ||
8bae0a0c JSC |
1651 | /* The IDT monitor actually allows two instructions per vector |
1652 | slot. However, the simulator currently causes a trap on each | |
1653 | individual instruction. We cheat, and lose the bottom bit. */ | |
1654 | reason >>= 1; | |
1655 | ||
1656 | /* The following callback functions are available, however the | |
1657 | monitor we are simulating does not make use of them: get_errno, | |
1658 | isatty, lseek, rename, system, time and unlink */ | |
1659 | switch (reason) { | |
1660 | case 6: /* int open(char *path,int flags) */ | |
1661 | { | |
e871dd18 | 1662 | uword64 paddr; |
8bae0a0c JSC |
1663 | int cca; |
1664 | if (AddressTranslation(A0,isDATA,isLOAD,&paddr,&cca,isHOST,isREAL)) | |
1665 | V0 = callback->open(callback,(char *)((int)paddr),(int)A1); | |
1666 | else | |
f24b7b69 | 1667 | sim_error("Attempt to pass pointer that does not reference simulated memory"); |
8bae0a0c JSC |
1668 | } |
1669 | break; | |
1670 | ||
1671 | case 7: /* int read(int file,char *ptr,int len) */ | |
1672 | { | |
e871dd18 | 1673 | uword64 paddr; |
8bae0a0c JSC |
1674 | int cca; |
1675 | if (AddressTranslation(A1,isDATA,isLOAD,&paddr,&cca,isHOST,isREAL)) | |
1676 | V0 = callback->read(callback,(int)A0,(char *)((int)paddr),(int)A2); | |
1677 | else | |
f24b7b69 | 1678 | sim_error("Attempt to pass pointer that does not reference simulated memory"); |
8bae0a0c JSC |
1679 | } |
1680 | break; | |
1681 | ||
1682 | case 8: /* int write(int file,char *ptr,int len) */ | |
1683 | { | |
e871dd18 | 1684 | uword64 paddr; |
8bae0a0c JSC |
1685 | int cca; |
1686 | if (AddressTranslation(A1,isDATA,isLOAD,&paddr,&cca,isHOST,isREAL)) | |
53b9417e | 1687 | V0 = callback->write(callback,(int)A0,(const char *)((int)paddr),(int)A2); |
8bae0a0c | 1688 | else |
f24b7b69 | 1689 | sim_error("Attempt to pass pointer that does not reference simulated memory"); |
8bae0a0c JSC |
1690 | } |
1691 | break; | |
1692 | ||
1693 | case 10: /* int close(int file) */ | |
1694 | V0 = callback->close(callback,(int)A0); | |
1695 | break; | |
1696 | ||
1697 | case 11: /* char inbyte(void) */ | |
1698 | { | |
1699 | char tmp; | |
1700 | if (callback->read_stdin(callback,&tmp,sizeof(char)) != sizeof(char)) { | |
f24b7b69 | 1701 | sim_error("Invalid return from character read"); |
e3d12c65 | 1702 | V0 = (ut_reg)-1; |
8bae0a0c JSC |
1703 | } |
1704 | else | |
e3d12c65 | 1705 | V0 = (ut_reg)tmp; |
8bae0a0c JSC |
1706 | } |
1707 | break; | |
1708 | ||
1709 | case 12: /* void outbyte(char chr) : write a byte to "stdout" */ | |
1710 | { | |
1711 | char tmp = (char)(A0 & 0xFF); | |
1712 | callback->write_stdout(callback,&tmp,sizeof(char)); | |
1713 | } | |
1714 | break; | |
1715 | ||
1716 | case 17: /* void _exit() */ | |
f24b7b69 | 1717 | sim_warning("sim_monitor(17): _exit(int reason) to be coded"); |
2e61a3ad AC |
1718 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, sim_exited, |
1719 | (unsigned int)(A0 & 0xFFFFFFFF)); | |
8bae0a0c JSC |
1720 | break; |
1721 | ||
280f90e1 AMT |
1722 | case 28 : /* PMON flush_cache */ |
1723 | break; | |
1724 | ||
8bae0a0c JSC |
1725 | case 55: /* void get_mem_info(unsigned int *ptr) */ |
1726 | /* in: A0 = pointer to three word memory location */ | |
1727 | /* out: [A0 + 0] = size */ | |
1728 | /* [A0 + 4] = instruction cache size */ | |
1729 | /* [A0 + 8] = data cache size */ | |
1730 | { | |
e871dd18 JSC |
1731 | uword64 vaddr = A0; |
1732 | uword64 paddr, value; | |
8bae0a0c JSC |
1733 | int cca; |
1734 | int failed = 0; | |
1735 | ||
1736 | /* NOTE: We use RAW memory writes here, but since we are not | |
1737 | gathering statistics for the monitor calls we are simulating, | |
1738 | it is not an issue. */ | |
1739 | ||
1740 | /* Memory size */ | |
1741 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isREAL)) { | |
50a2a691 | 1742 | value = (uword64)STATE_MEM_SIZE (sd); |
53b9417e | 1743 | StoreMemory(cca,AccessLength_WORD,value,0,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1744 | /* We re-do the address translations, in-case the block |
1745 | overlaps a memory boundary: */ | |
1746 | value = 0; | |
1747 | vaddr += (AccessLength_WORD + 1); | |
1748 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isREAL)) { | |
53b9417e | 1749 | StoreMemory(cca,AccessLength_WORD,0,value,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1750 | vaddr += (AccessLength_WORD + 1); |
1751 | if (AddressTranslation(vaddr,isDATA,isSTORE,&paddr,&cca,isTARGET,isREAL)) | |
53b9417e | 1752 | StoreMemory(cca,AccessLength_WORD,value,0,paddr,vaddr,isRAW); |
8bae0a0c JSC |
1753 | else |
1754 | failed = -1; | |
1755 | } else | |
1756 | failed = -1; | |
1757 | } else | |
1758 | failed = -1; | |
1759 | ||
1760 | if (failed) | |
f24b7b69 | 1761 | sim_error("Invalid pointer passed into monitor call"); |
8bae0a0c JSC |
1762 | } |
1763 | break; | |
1764 | ||
a9f7253f JSC |
1765 | case 158 : /* PMON printf */ |
1766 | /* in: A0 = pointer to format string */ | |
1767 | /* A1 = optional argument 1 */ | |
1768 | /* A2 = optional argument 2 */ | |
1769 | /* A3 = optional argument 3 */ | |
1770 | /* out: void */ | |
f24b7b69 | 1771 | /* The following is based on the PMON printf source */ |
a9f7253f JSC |
1772 | { |
1773 | uword64 paddr; | |
1774 | int cca; | |
f24b7b69 JSC |
1775 | /* This isn't the quickest way, since we call the host print |
1776 | routine for every character almost. But it does avoid | |
1777 | having to allocate and manage a temporary string buffer. */ | |
1778 | if (AddressTranslation(A0,isDATA,isLOAD,&paddr,&cca,isHOST,isREAL)) { | |
1779 | char *s = (char *)((int)paddr); | |
1780 | ut_reg *ap = &A1; /* 1st argument */ | |
1781 | /* TODO: Include check that we only use three arguments (A1, A2 and A3) */ | |
1782 | for (; *s;) { | |
1783 | if (*s == '%') { | |
1784 | char tmp[40]; | |
1785 | enum {FMT_RJUST, FMT_LJUST, FMT_RJUST0, FMT_CENTER} fmt = FMT_RJUST; | |
1786 | int width = 0, trunc = 0, haddot = 0, longlong = 0; | |
f24b7b69 JSC |
1787 | s++; |
1788 | for (; *s; s++) { | |
1789 | if (strchr ("dobxXulscefg%", *s)) | |
1790 | break; | |
1791 | else if (*s == '-') | |
1792 | fmt = FMT_LJUST; | |
1793 | else if (*s == '0') | |
1794 | fmt = FMT_RJUST0; | |
1795 | else if (*s == '~') | |
1796 | fmt = FMT_CENTER; | |
1797 | else if (*s == '*') { | |
1798 | if (haddot) | |
1799 | trunc = (int)*ap++; | |
1800 | else | |
1801 | width = (int)*ap++; | |
1802 | } else if (*s >= '1' && *s <= '9') { | |
1803 | char *t; | |
1804 | unsigned int n; | |
1805 | for (t = s; isdigit (*s); s++); | |
1806 | strncpy (tmp, t, s - t); | |
1807 | tmp[s - t] = '\0'; | |
1808 | n = (unsigned int)strtol(tmp,NULL,10); | |
1809 | if (haddot) | |
1810 | trunc = n; | |
1811 | else | |
1812 | width = n; | |
1813 | s--; | |
1814 | } else if (*s == '.') | |
1815 | haddot = 1; | |
1816 | } | |
1817 | if (*s == '%') { | |
1818 | callback->printf_filtered(callback,"%%"); | |
1819 | } else if (*s == 's') { | |
1820 | if ((int)*ap != 0) { | |
1821 | if (AddressTranslation(*ap++,isDATA,isLOAD,&paddr,&cca,isHOST,isREAL)) { | |
1822 | char *p = (char *)((int)paddr);; | |
1823 | callback->printf_filtered(callback,p); | |
1824 | } else { | |
1825 | ap++; | |
1826 | sim_error("Attempt to pass pointer that does not reference simulated memory"); | |
1827 | } | |
1828 | } | |
1829 | else | |
1830 | callback->printf_filtered(callback,"(null)"); | |
1831 | } else if (*s == 'c') { | |
1832 | int n = (int)*ap++; | |
1833 | callback->printf_filtered(callback,"%c",n); | |
1834 | } else { | |
1835 | if (*s == 'l') { | |
1836 | if (*++s == 'l') { | |
1837 | longlong = 1; | |
1838 | ++s; | |
1839 | } | |
1840 | } | |
1841 | if (strchr ("dobxXu", *s)) { | |
e3d12c65 | 1842 | word64 lv = (word64) *ap++; |
f24b7b69 JSC |
1843 | if (*s == 'b') |
1844 | callback->printf_filtered(callback,"<binary not supported>"); | |
1845 | else { | |
1846 | sprintf(tmp,"%%%s%c",longlong ? "ll" : "",*s); | |
1847 | if (longlong) | |
1848 | callback->printf_filtered(callback,tmp,lv); | |
1849 | else | |
1850 | callback->printf_filtered(callback,tmp,(int)lv); | |
1851 | } | |
1852 | } else if (strchr ("eEfgG", *s)) { | |
e3d12c65 DE |
1853 | #ifdef _MSC_VER /* MSVC version 2.x can't convert from uword64 directly */ |
1854 | double dbl = (double)((word64)*ap++); | |
1855 | #else | |
f24b7b69 | 1856 | double dbl = (double)*ap++; |
e3d12c65 | 1857 | #endif |
f24b7b69 JSC |
1858 | sprintf(tmp,"%%%d.%d%c",width,trunc,*s); |
1859 | callback->printf_filtered(callback,tmp,dbl); | |
1860 | trunc = 0; | |
1861 | } | |
1862 | } | |
1863 | s++; | |
1864 | } else | |
1865 | callback->printf_filtered(callback,"%c",*s++); | |
1866 | } | |
1867 | } else | |
1868 | sim_error("Attempt to pass pointer that does not reference simulated memory"); | |
a9f7253f JSC |
1869 | } |
1870 | break; | |
1871 | ||
8bae0a0c | 1872 | default: |
53b9417e DE |
1873 | sim_warning("TODO: sim_monitor(%d) : PC = 0x%s",reason,pr_addr(IPC)); |
1874 | sim_warning("(Arguments : A0 = 0x%s : A1 = 0x%s : A2 = 0x%s : A3 = 0x%s)",pr_addr(A0),pr_addr(A1),pr_addr(A2),pr_addr(A3)); | |
8bae0a0c JSC |
1875 | break; |
1876 | } | |
1877 | return; | |
1878 | } | |
1879 | ||
7e6c297e ILT |
1880 | /* Store a word into memory. */ |
1881 | ||
1882 | static void | |
1883 | store_word (vaddr, val) | |
1884 | uword64 vaddr; | |
1885 | t_reg val; | |
1886 | { | |
1887 | uword64 paddr; | |
1888 | int uncached; | |
1889 | ||
1890 | if ((vaddr & 3) != 0) | |
1891 | SignalException (AddressStore); | |
1892 | else | |
1893 | { | |
1894 | if (AddressTranslation (vaddr, isDATA, isSTORE, &paddr, &uncached, | |
1895 | isTARGET, isREAL)) | |
1896 | { | |
1897 | const uword64 mask = 7; | |
1898 | uword64 memval; | |
1899 | unsigned int byte; | |
1900 | ||
1901 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)); | |
1902 | byte = (vaddr & mask) ^ (BigEndianCPU << 2); | |
1903 | memval = ((uword64) val) << (8 * byte); | |
53b9417e | 1904 | StoreMemory (uncached, AccessLength_WORD, memval, 0, paddr, vaddr, |
7e6c297e ILT |
1905 | isREAL); |
1906 | } | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | /* Load a word from memory. */ | |
1911 | ||
1912 | static t_reg | |
1913 | load_word (vaddr) | |
1914 | uword64 vaddr; | |
1915 | { | |
1916 | if ((vaddr & 3) != 0) | |
1917 | SignalException (AddressLoad); | |
1918 | else | |
1919 | { | |
1920 | uword64 paddr; | |
1921 | int uncached; | |
1922 | ||
1923 | if (AddressTranslation (vaddr, isDATA, isLOAD, &paddr, &uncached, | |
1924 | isTARGET, isREAL)) | |
1925 | { | |
1926 | const uword64 mask = 0x7; | |
1927 | const unsigned int reverse = ReverseEndian ? 1 : 0; | |
1928 | const unsigned int bigend = BigEndianCPU ? 1 : 0; | |
1929 | uword64 memval; | |
1930 | unsigned int byte; | |
1931 | ||
1932 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (reverse << 2)); | |
53b9417e | 1933 | LoadMemory (&memval,NULL,uncached, AccessLength_WORD, paddr, vaddr, |
7e6c297e ILT |
1934 | isDATA, isREAL); |
1935 | byte = (vaddr & mask) ^ (bigend << 2); | |
1936 | return SIGNEXTEND (((memval >> (8 * byte)) & 0xffffffff), 32); | |
1937 | } | |
1938 | } | |
1939 | ||
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | /* Simulate the mips16 entry and exit pseudo-instructions. These | |
1944 | would normally be handled by the reserved instruction exception | |
1945 | code, but for ease of simulation we just handle them directly. */ | |
1946 | ||
1947 | static void | |
1948 | mips16_entry (insn) | |
1949 | unsigned int insn; | |
1950 | { | |
1951 | int aregs, sregs, rreg; | |
1952 | ||
53b9417e DE |
1953 | #ifdef DEBUG |
1954 | printf("DBG: mips16_entry: entered (insn = 0x%08X)\n",insn); | |
1955 | #endif /* DEBUG */ | |
1956 | ||
7e6c297e ILT |
1957 | aregs = (insn & 0x700) >> 8; |
1958 | sregs = (insn & 0x0c0) >> 6; | |
1959 | rreg = (insn & 0x020) >> 5; | |
1960 | ||
da0bce9c ILT |
1961 | /* This should be checked by the caller. */ |
1962 | if (sregs == 3) | |
7e6c297e ILT |
1963 | abort (); |
1964 | ||
da0bce9c | 1965 | if (aregs < 5) |
7e6c297e ILT |
1966 | { |
1967 | int i; | |
1968 | t_reg tsp; | |
1969 | ||
1970 | /* This is the entry pseudo-instruction. */ | |
1971 | ||
1972 | for (i = 0; i < aregs; i++) | |
1973 | store_word ((uword64) (SP + 4 * i), registers[i + 4]); | |
1974 | ||
1975 | tsp = SP; | |
1976 | SP -= 32; | |
1977 | ||
1978 | if (rreg) | |
1979 | { | |
1980 | tsp -= 4; | |
1981 | store_word ((uword64) tsp, RA); | |
1982 | } | |
1983 | ||
1984 | for (i = 0; i < sregs; i++) | |
1985 | { | |
1986 | tsp -= 4; | |
1987 | store_word ((uword64) tsp, registers[16 + i]); | |
1988 | } | |
1989 | } | |
1990 | else | |
1991 | { | |
1992 | int i; | |
1993 | t_reg tsp; | |
1994 | ||
1995 | /* This is the exit pseudo-instruction. */ | |
1996 | ||
1997 | tsp = SP + 32; | |
1998 | ||
1999 | if (rreg) | |
2000 | { | |
2001 | tsp -= 4; | |
2002 | RA = load_word ((uword64) tsp); | |
2003 | } | |
2004 | ||
2005 | for (i = 0; i < sregs; i++) | |
2006 | { | |
2007 | tsp -= 4; | |
2008 | registers[i + 16] = load_word ((uword64) tsp); | |
2009 | } | |
2010 | ||
2011 | SP += 32; | |
2012 | ||
da0bce9c ILT |
2013 | if (aregs == 5) |
2014 | { | |
2015 | FGR[0] = WORD64LO (GPR[4]); | |
2016 | fpr_state[0] = fmt_uninterpreted; | |
2017 | } | |
2018 | else if (aregs == 6) | |
2019 | { | |
2020 | FGR[0] = WORD64LO (GPR[5]); | |
2021 | FGR[1] = WORD64LO (GPR[4]); | |
2022 | fpr_state[0] = fmt_uninterpreted; | |
2023 | fpr_state[1] = fmt_uninterpreted; | |
2024 | } | |
2025 | ||
7e6c297e ILT |
2026 | PC = RA; |
2027 | } | |
2028 | } | |
2029 | ||
f24b7b69 | 2030 | void |
e3d12c65 | 2031 | sim_warning(char *fmt,...) |
f24b7b69 | 2032 | { |
6429b296 | 2033 | char buf[256]; |
f24b7b69 | 2034 | va_list ap; |
6429b296 JW |
2035 | |
2036 | va_start (ap,fmt); | |
2037 | vsprintf (buf, fmt, ap); | |
2038 | va_end (ap); | |
2039 | ||
f24b7b69 | 2040 | if (logfh != NULL) { |
6429b296 JW |
2041 | fprintf(logfh,"SIM Warning: %s\n", buf); |
2042 | } else { | |
2043 | callback->printf_filtered(callback,"SIM Warning: %s\n", buf); | |
f24b7b69 | 2044 | } |
6429b296 JW |
2045 | /* This used to call SignalException with a SimulatorFault, but that causes |
2046 | the simulator to exit, and that is inappropriate for a warning. */ | |
f24b7b69 JSC |
2047 | return; |
2048 | } | |
2049 | ||
8bae0a0c | 2050 | void |
e3d12c65 | 2051 | sim_error(char *fmt,...) |
8bae0a0c | 2052 | { |
6429b296 | 2053 | char buf[256]; |
8bae0a0c | 2054 | va_list ap; |
6429b296 JW |
2055 | |
2056 | va_start (ap,fmt); | |
2057 | vsprintf (buf, fmt, ap); | |
2058 | va_end (ap); | |
2059 | ||
2060 | callback->printf_filtered(callback,"SIM Error: %s", buf); | |
2061 | SignalException (SimulatorFault, buf); | |
8bae0a0c JSC |
2062 | return; |
2063 | } | |
2064 | ||
2065 | static unsigned int | |
2066 | power2(value) | |
2067 | unsigned int value; | |
2068 | { | |
2069 | int loop,tmp; | |
2070 | ||
2071 | /* Round *UP* to the nearest power-of-2 if not already one */ | |
2072 | if (value != (value & ~(value - 1))) { | |
2073 | for (tmp = value, loop = 0; (tmp != 0); loop++) | |
2074 | tmp >>= 1; | |
2075 | value = (1 << loop); | |
2076 | } | |
2077 | ||
2078 | return(value); | |
2079 | } | |
2080 | ||
2081 | static long | |
2082 | getnum(value) | |
2083 | char *value; | |
2084 | { | |
2085 | long num; | |
2086 | char *end; | |
2087 | ||
2088 | num = strtol(value,&end,10); | |
2089 | if (end == value) | |
2090 | callback->printf_filtered(callback,"Warning: Invalid number \"%s\" ignored, using zero\n",value); | |
2091 | else { | |
2092 | if (*end && ((tolower(*end) == 'k') || (tolower(*end) == 'm'))) { | |
2093 | if (tolower(*end) == 'k') | |
2094 | num *= (1 << 10); | |
2095 | else | |
2096 | num *= (1 << 20); | |
2097 | end++; | |
2098 | } | |
2099 | if (*end) | |
2100 | callback->printf_filtered(callback,"Warning: Spurious characters \"%s\" at end of number ignored\n",end); | |
2101 | } | |
2102 | ||
2103 | return(num); | |
2104 | } | |
2105 | ||
2106 | /*-- trace support ----------------------------------------------------------*/ | |
2107 | ||
2108 | /* The TRACE support is provided (if required) in the memory accessing | |
2109 | routines. Since we are also providing the architecture specific | |
2110 | features, the architecture simulation code can also deal with | |
2111 | notifying the TRACE world of cache flushes, etc. Similarly we do | |
2112 | not need to provide profiling support in the simulator engine, | |
2113 | since we can sample in the instruction fetch control loop. By | |
2114 | defining the TRACE manifest, we add tracing as a run-time | |
2115 | option. */ | |
2116 | ||
2117 | #if defined(TRACE) | |
2118 | /* Tracing by default produces "din" format (as required by | |
2119 | dineroIII). Each line of such a trace file *MUST* have a din label | |
2120 | and address field. The rest of the line is ignored, so comments can | |
2121 | be included if desired. The first field is the label which must be | |
2122 | one of the following values: | |
2123 | ||
2124 | 0 read data | |
2125 | 1 write data | |
2126 | 2 instruction fetch | |
2127 | 3 escape record (treated as unknown access type) | |
2128 | 4 escape record (causes cache flush) | |
2129 | ||
2130 | The address field is a 32bit (lower-case) hexadecimal address | |
2131 | value. The address should *NOT* be preceded by "0x". | |
2132 | ||
2133 | The size of the memory transfer is not important when dealing with | |
2134 | cache lines (as long as no more than a cache line can be | |
2135 | transferred in a single operation :-), however more information | |
2136 | could be given following the dineroIII requirement to allow more | |
2137 | complete memory and cache simulators to provide better | |
2138 | results. i.e. the University of Pisa has a cache simulator that can | |
2139 | also take bus size and speed as (variable) inputs to calculate | |
2140 | complete system performance (a much more useful ability when trying | |
2141 | to construct an end product, rather than a processor). They | |
2142 | currently have an ARM version of their tool called ChARM. */ | |
2143 | ||
e3d12c65 | 2144 | |
8bae0a0c | 2145 | static |
e3d12c65 | 2146 | void dotrace(FILE *tracefh,int type,SIM_ADDR address,int width,char *comment,...) |
8bae0a0c JSC |
2147 | { |
2148 | if (state & simTRACE) { | |
2149 | va_list ap; | |
53b9417e | 2150 | fprintf(tracefh,"%d %s ; width %d ; ", |
6429b296 | 2151 | type, |
53b9417e DE |
2152 | pr_addr(address), |
2153 | width); | |
8bae0a0c | 2154 | va_start(ap,comment); |
6429b296 | 2155 | vfprintf(tracefh,comment,ap); |
8bae0a0c JSC |
2156 | va_end(ap); |
2157 | fprintf(tracefh,"\n"); | |
2158 | } | |
2159 | /* NOTE: Since the "din" format will only accept 32bit addresses, and | |
2160 | we may be generating 64bit ones, we should put the hi-32bits of the | |
2161 | address into the comment field. */ | |
2162 | ||
2163 | /* TODO: Provide a buffer for the trace lines. We can then avoid | |
2164 | performing writes until the buffer is filled, or the file is | |
2165 | being closed. */ | |
2166 | ||
2167 | /* NOTE: We could consider adding a comment field to the "din" file | |
2168 | produced using type 3 markers (unknown access). This would then | |
2169 | allow information about the program that the "din" is for, and | |
2170 | the MIPs world that was being simulated, to be placed into the | |
2171 | trace file. */ | |
2172 | ||
2173 | return; | |
2174 | } | |
2175 | #endif /* TRACE */ | |
2176 | ||
2177 | /*---------------------------------------------------------------------------*/ | |
2178 | /*-- simulator engine -------------------------------------------------------*/ | |
2179 | /*---------------------------------------------------------------------------*/ | |
2180 | ||
2181 | static void | |
2182 | ColdReset() | |
2183 | { | |
2184 | /* RESET: Fixed PC address: */ | |
e871dd18 | 2185 | PC = (((uword64)0xFFFFFFFF<<32) | 0xBFC00000); |
8bae0a0c JSC |
2186 | /* The reset vector address is in the unmapped, uncached memory space. */ |
2187 | ||
2188 | SR &= ~(status_SR | status_TS | status_RP); | |
2189 | SR |= (status_ERL | status_BEV); | |
8bae0a0c JSC |
2190 | |
2191 | #if defined(HASFPU) && (GPRLEN == (64)) | |
2192 | /* Cheat and allow access to the complete register set immediately: */ | |
2193 | SR |= status_FR; /* 64bit registers */ | |
2194 | #endif /* HASFPU and 64bit FP registers */ | |
2195 | ||
2196 | /* Ensure that any instructions with pending register updates are | |
2197 | cleared: */ | |
2198 | { | |
2199 | int loop; | |
2200 | for (loop = 0; (loop < PSLOTS); loop++) | |
2201 | pending_slot_reg[loop] = (LAST_EMBED_REGNUM + 1); | |
2202 | pending_in = pending_out = pending_total = 0; | |
2203 | } | |
2204 | ||
2205 | #if defined(HASFPU) | |
2206 | /* Initialise the FPU registers to the unknown state */ | |
2207 | { | |
2208 | int rn; | |
2209 | for (rn = 0; (rn < 32); rn++) | |
2210 | fpr_state[rn] = fmt_uninterpreted; | |
2211 | } | |
2212 | #endif /* HASFPU */ | |
2213 | ||
2214 | return; | |
2215 | } | |
2216 | ||
2217 | /* Description from page A-22 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
2218 | /* Translate a virtual address to a physical address and cache | |
2219 | coherence algorithm describing the mechanism used to resolve the | |
2220 | memory reference. Given the virtual address vAddr, and whether the | |
2221 | reference is to Instructions ot Data (IorD), find the corresponding | |
2222 | physical address (pAddr) and the cache coherence algorithm (CCA) | |
2223 | used to resolve the reference. If the virtual address is in one of | |
2224 | the unmapped address spaces the physical address and the CCA are | |
2225 | determined directly by the virtual address. If the virtual address | |
2226 | is in one of the mapped address spaces then the TLB is used to | |
2227 | determine the physical address and access type; if the required | |
2228 | translation is not present in the TLB or the desired access is not | |
2229 | permitted the function fails and an exception is taken. | |
2230 | ||
2231 | NOTE: This function is extended to return an exception state. This, | |
2232 | along with the exception generation is used to notify whether a | |
2233 | valid address translation occured */ | |
2234 | ||
2235 | static int | |
2236 | AddressTranslation(vAddr,IorD,LorS,pAddr,CCA,host,raw) | |
e871dd18 | 2237 | uword64 vAddr; |
8bae0a0c JSC |
2238 | int IorD; |
2239 | int LorS; | |
e871dd18 | 2240 | uword64 *pAddr; |
8bae0a0c JSC |
2241 | int *CCA; |
2242 | int host; | |
2243 | int raw; | |
2244 | { | |
50a2a691 | 2245 | SIM_DESC sd = &simulator; |
8bae0a0c JSC |
2246 | int res = -1; /* TRUE : Assume good return */ |
2247 | ||
2248 | #ifdef DEBUG | |
53b9417e | 2249 | callback->printf_filtered(callback,"AddressTranslation(0x%s,%s,%s,...);\n",pr_addr(vAddr),(IorD ? "isDATA" : "isINSTRUCTION"),(LorS ? "iSTORE" : "isLOAD")); |
8bae0a0c JSC |
2250 | #endif |
2251 | ||
2252 | /* Check that the address is valid for this memory model */ | |
2253 | ||
2254 | /* For a simple (flat) memory model, we simply pass virtual | |
2255 | addressess through (mostly) unchanged. */ | |
2256 | vAddr &= 0xFFFFFFFF; | |
a9f7253f JSC |
2257 | |
2258 | /* Treat the kernel memory spaces identically for the moment: */ | |
50a2a691 | 2259 | if ((STATE_MEM_BASE (sd) == K1BASE) && (vAddr >= K0BASE) && (vAddr < (K0BASE + K0SIZE))) |
a9f7253f JSC |
2260 | vAddr += (K1BASE - K0BASE); |
2261 | ||
2262 | /* Also assume that the K1BASE memory wraps. This is required to | |
2263 | allow the PMON run-time __sizemem() routine to function (without | |
2264 | having to provide exception simulation). NOTE: A kludge to work | |
2265 | around the fact that the monitor memory is currently held in the | |
2266 | K1BASE space. */ | |
2267 | if (((vAddr < monitor_base) || (vAddr >= (monitor_base + monitor_size))) && (vAddr >= K1BASE && vAddr < (K1BASE + K1SIZE))) | |
50a2a691 | 2268 | vAddr = (K1BASE | (vAddr & (STATE_MEM_SIZE (sd) - 1))); |
a9f7253f | 2269 | |
8bae0a0c JSC |
2270 | *pAddr = vAddr; /* default for isTARGET */ |
2271 | *CCA = Uncached; /* not used for isHOST */ | |
2272 | ||
2273 | /* NOTE: This is a duplicate of the code that appears in the | |
2274 | LoadMemory and StoreMemory functions. They should be merged into | |
2275 | a single function (that can be in-lined if required). */ | |
50a2a691 | 2276 | if ((vAddr >= STATE_MEM_BASE (sd)) && (vAddr < (STATE_MEM_BASE (sd) + STATE_MEM_SIZE (sd)))) { |
8bae0a0c | 2277 | if (host) |
50a2a691 | 2278 | *pAddr = (int)&STATE_MEMORY (sd)[((unsigned int)(vAddr - STATE_MEM_BASE (sd)) & (STATE_MEM_SIZE (sd) - 1))]; |
8bae0a0c JSC |
2279 | } else if ((vAddr >= monitor_base) && (vAddr < (monitor_base + monitor_size))) { |
2280 | if (host) | |
2281 | *pAddr = (int)&monitor[((unsigned int)(vAddr - monitor_base) & (monitor_size - 1))]; | |
2282 | } else { | |
6429b296 | 2283 | #ifdef DEBUG |
53b9417e | 2284 | sim_warning("Failed: AddressTranslation(0x%s,%s,%s,...) IPC = 0x%s",pr_addr(vAddr),(IorD ? "isDATA" : "isINSTRUCTION"),(LorS ? "isSTORE" : "isLOAD"),pr_addr(IPC)); |
8bae0a0c JSC |
2285 | #endif /* DEBUG */ |
2286 | res = 0; /* AddressTranslation has failed */ | |
e3d12c65 | 2287 | *pAddr = (SIM_ADDR)-1; |
8bae0a0c JSC |
2288 | if (!raw) /* only generate exceptions on real memory transfers */ |
2289 | SignalException((LorS == isSTORE) ? AddressStore : AddressLoad); | |
6429b296 | 2290 | #ifdef DEBUG |
8bae0a0c | 2291 | else |
6429b296 JW |
2292 | /* This is a normal occurance during gdb operation, for instance trying |
2293 | to print parameters at function start before they have been setup, | |
2294 | and hence we should not print a warning except when debugging the | |
2295 | simulator. */ | |
53b9417e | 2296 | sim_warning("AddressTranslation for %s %s from 0x%s failed",(IorD ? "data" : "instruction"),(LorS ? "store" : "load"),pr_addr(vAddr)); |
6429b296 | 2297 | #endif |
8bae0a0c JSC |
2298 | } |
2299 | ||
2300 | return(res); | |
2301 | } | |
2302 | ||
2303 | /* Description from page A-23 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
2304 | /* Prefetch data from memory. Prefetch is an advisory instruction for | |
2305 | which an implementation specific action is taken. The action taken | |
2306 | may increase performance, but must not change the meaning of the | |
2307 | program, or alter architecturally-visible state. */ | |
50a2a691 AC |
2308 | |
2309 | static void UNUSED | |
8bae0a0c JSC |
2310 | Prefetch(CCA,pAddr,vAddr,DATA,hint) |
2311 | int CCA; | |
e871dd18 JSC |
2312 | uword64 pAddr; |
2313 | uword64 vAddr; | |
8bae0a0c JSC |
2314 | int DATA; |
2315 | int hint; | |
2316 | { | |
2317 | #ifdef DEBUG | |
53b9417e | 2318 | callback->printf_filtered(callback,"Prefetch(%d,0x%s,0x%s,%d,%d);\n",CCA,pr_addr(pAddr),pr_addr(vAddr),DATA,hint); |
8bae0a0c JSC |
2319 | #endif /* DEBUG */ |
2320 | ||
2321 | /* For our simple memory model we do nothing */ | |
2322 | return; | |
2323 | } | |
2324 | ||
2325 | /* Description from page A-22 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
2326 | /* Load a value from memory. Use the cache and main memory as | |
2327 | specified in the Cache Coherence Algorithm (CCA) and the sort of | |
2328 | access (IorD) to find the contents of AccessLength memory bytes | |
2329 | starting at physical location pAddr. The data is returned in the | |
2330 | fixed width naturally-aligned memory element (MemElem). The | |
2331 | low-order two (or three) bits of the address and the AccessLength | |
2332 | indicate which of the bytes within MemElem needs to be given to the | |
2333 | processor. If the memory access type of the reference is uncached | |
2334 | then only the referenced bytes are read from memory and valid | |
2335 | within the memory element. If the access type is cached, and the | |
2336 | data is not present in cache, an implementation specific size and | |
2337 | alignment block of memory is read and loaded into the cache to | |
2338 | satisfy a load reference. At a minimum, the block is the entire | |
2339 | memory element. */ | |
53b9417e DE |
2340 | static void |
2341 | LoadMemory(memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD,raw) | |
2342 | uword64* memvalp; | |
2343 | uword64* memval1p; | |
8bae0a0c JSC |
2344 | int CCA; |
2345 | int AccessLength; | |
e871dd18 JSC |
2346 | uword64 pAddr; |
2347 | uword64 vAddr; | |
8bae0a0c JSC |
2348 | int IorD; |
2349 | int raw; | |
2350 | { | |
50a2a691 AC |
2351 | SIM_DESC sd = &simulator; |
2352 | uword64 value = 0; | |
2353 | uword64 value1 = 0; | |
8bae0a0c JSC |
2354 | |
2355 | #ifdef DEBUG | |
50a2a691 | 2356 | if (STATE_MEMORY (sd) == NULL) |
53b9417e | 2357 | callback->printf_filtered(callback,"DBG: LoadMemory(%p,%p,%d,%d,0x%s,0x%s,%s,%s)\n",memvalp,memval1p,CCA,AccessLength,pr_addr(pAddr),pr_addr(vAddr),(IorD ? "isDATA" : "isINSTRUCTION"),(raw ? "isRAW" : "isREAL")); |
8bae0a0c JSC |
2358 | #endif /* DEBUG */ |
2359 | ||
2360 | #if defined(WARN_MEM) | |
2361 | if (CCA != uncached) | |
f24b7b69 | 2362 | sim_warning("LoadMemory CCA (%d) is not uncached (currently all accesses treated as cached)",CCA); |
8bae0a0c JSC |
2363 | |
2364 | if (((pAddr & LOADDRMASK) + AccessLength) > LOADDRMASK) { | |
2365 | /* In reality this should be a Bus Error */ | |
53b9417e | 2366 | sim_error("AccessLength of %d would extend over %dbit aligned boundary for physical address 0x%s\n",AccessLength,(LOADDRMASK + 1)<<2,pr_addr(pAddr)); |
8bae0a0c JSC |
2367 | } |
2368 | #endif /* WARN_MEM */ | |
2369 | ||
2370 | /* Decide which physical memory locations are being dealt with. At | |
2371 | this point we should be able to split the pAddr bits into the | |
2372 | relevant address map being simulated. If the "raw" variable is | |
2373 | set, the memory read being performed should *NOT* update any I/O | |
2374 | state or affect the CPU state. This also includes avoiding | |
2375 | affecting statistics gathering. */ | |
2376 | ||
2377 | /* If instruction fetch then we need to check that the two lo-order | |
2378 | bits are zero, otherwise raise a InstructionFetch exception: */ | |
6429b296 JW |
2379 | if ((IorD == isINSTRUCTION) |
2380 | && ((pAddr & 0x3) != 0) | |
2381 | && (((pAddr & 0x1) != 0) || ((vAddr & 0x1) == 0))) | |
8bae0a0c JSC |
2382 | SignalException(InstructionFetch); |
2383 | else { | |
50a2a691 | 2384 | unsigned int index = 0; |
8bae0a0c JSC |
2385 | unsigned char *mem = NULL; |
2386 | ||
8bae0a0c JSC |
2387 | #if defined(TRACE) |
2388 | if (!raw) | |
2389 | dotrace(tracefh,((IorD == isDATA) ? 0 : 2),(unsigned int)(pAddr&0xFFFFFFFF),(AccessLength + 1),"load%s",((IorD == isDATA) ? "" : " instruction")); | |
2390 | #endif /* TRACE */ | |
2391 | ||
2392 | /* NOTE: Quicker methods of decoding the address space can be used | |
2393 | when a real memory map is being simulated (i.e. using hi-order | |
2394 | address bits to select device). */ | |
50a2a691 AC |
2395 | if ((pAddr >= STATE_MEM_BASE (sd)) && (pAddr < (STATE_MEM_BASE (sd) + STATE_MEM_SIZE (sd)))) { |
2396 | index = ((unsigned int)(pAddr - STATE_MEM_BASE (sd)) & (STATE_MEM_SIZE (sd) - 1)); | |
2397 | mem = STATE_MEMORY (sd); | |
8bae0a0c JSC |
2398 | } else if ((pAddr >= monitor_base) && (pAddr < (monitor_base + monitor_size))) { |
2399 | index = ((unsigned int)(pAddr - monitor_base) & (monitor_size - 1)); | |
2400 | mem = monitor; | |
2401 | } | |
2402 | if (mem == NULL) | |
53b9417e | 2403 | sim_error("Simulator memory not found for physical address 0x%s\n",pr_addr(pAddr)); |
8bae0a0c JSC |
2404 | else { |
2405 | /* If we obtained the endianness of the host, and it is the same | |
2406 | as the target memory system we can optimise the memory | |
2407 | accesses. However, without that information we must perform | |
2408 | slow transfer, and hope that the compiler optimisation will | |
2409 | merge successive loads. */ | |
8bae0a0c JSC |
2410 | |
2411 | /* In reality we should always be loading a doubleword value (or | |
2412 | word value in 32bit memory worlds). The external code then | |
2413 | extracts the required bytes. However, to keep performance | |
2414 | high we only load the required bytes into the relevant | |
2415 | slots. */ | |
0049ba7a | 2416 | if (BigEndianMem) |
8bae0a0c | 2417 | switch (AccessLength) { /* big-endian memory */ |
53b9417e DE |
2418 | case AccessLength_QUADWORD : |
2419 | value1 |= ((uword64)mem[index++] << 56); | |
2420 | case 14: /* AccessLength is one less than datalen */ | |
2421 | value1 |= ((uword64)mem[index++] << 48); | |
2422 | case 13: | |
2423 | value1 |= ((uword64)mem[index++] << 40); | |
2424 | case 12: | |
2425 | value1 |= ((uword64)mem[index++] << 32); | |
2426 | case 11: | |
2427 | value1 |= ((unsigned int)mem[index++] << 24); | |
2428 | case 10: | |
2429 | value1 |= ((unsigned int)mem[index++] << 16); | |
2430 | case 9: | |
2431 | value1 |= ((unsigned int)mem[index++] << 8); | |
2432 | case 8: | |
2433 | value1 |= mem[index]; | |
2434 | ||
8bae0a0c | 2435 | case AccessLength_DOUBLEWORD : |
e871dd18 | 2436 | value |= ((uword64)mem[index++] << 56); |
8bae0a0c | 2437 | case AccessLength_SEPTIBYTE : |
e871dd18 | 2438 | value |= ((uword64)mem[index++] << 48); |
8bae0a0c | 2439 | case AccessLength_SEXTIBYTE : |
e871dd18 | 2440 | value |= ((uword64)mem[index++] << 40); |
8bae0a0c | 2441 | case AccessLength_QUINTIBYTE : |
e871dd18 | 2442 | value |= ((uword64)mem[index++] << 32); |
8bae0a0c JSC |
2443 | case AccessLength_WORD : |
2444 | value |= ((unsigned int)mem[index++] << 24); | |
2445 | case AccessLength_TRIPLEBYTE : | |
2446 | value |= ((unsigned int)mem[index++] << 16); | |
2447 | case AccessLength_HALFWORD : | |
2448 | value |= ((unsigned int)mem[index++] << 8); | |
2449 | case AccessLength_BYTE : | |
2450 | value |= mem[index]; | |
2451 | break; | |
2452 | } | |
2453 | else { | |
2454 | index += (AccessLength + 1); | |
2455 | switch (AccessLength) { /* little-endian memory */ | |
53b9417e DE |
2456 | case AccessLength_QUADWORD : |
2457 | value1 |= ((uword64)mem[--index] << 56); | |
2458 | case 14: /* AccessLength is one less than datalen */ | |
2459 | value1 |= ((uword64)mem[--index] << 48); | |
2460 | case 13: | |
2461 | value1 |= ((uword64)mem[--index] << 40); | |
2462 | case 12: | |
2463 | value1 |= ((uword64)mem[--index] << 32); | |
2464 | case 11: | |
2465 | value1 |= ((uword64)mem[--index] << 24); | |
2466 | case 10: | |
2467 | value1 |= ((uword64)mem[--index] << 16); | |
2468 | case 9: | |
2469 | value1 |= ((uword64)mem[--index] << 8); | |
2470 | case 8: | |
2471 | value1 |= ((uword64)mem[--index] << 0); | |
2472 | ||
8bae0a0c | 2473 | case AccessLength_DOUBLEWORD : |
e871dd18 | 2474 | value |= ((uword64)mem[--index] << 56); |
8bae0a0c | 2475 | case AccessLength_SEPTIBYTE : |
e871dd18 | 2476 | value |= ((uword64)mem[--index] << 48); |
8bae0a0c | 2477 | case AccessLength_SEXTIBYTE : |
e871dd18 | 2478 | value |= ((uword64)mem[--index] << 40); |
8bae0a0c | 2479 | case AccessLength_QUINTIBYTE : |
e871dd18 | 2480 | value |= ((uword64)mem[--index] << 32); |
8bae0a0c | 2481 | case AccessLength_WORD : |
e871dd18 | 2482 | value |= ((uword64)mem[--index] << 24); |
8bae0a0c | 2483 | case AccessLength_TRIPLEBYTE : |
e871dd18 | 2484 | value |= ((uword64)mem[--index] << 16); |
8bae0a0c | 2485 | case AccessLength_HALFWORD : |
e871dd18 | 2486 | value |= ((uword64)mem[--index] << 8); |
8bae0a0c | 2487 | case AccessLength_BYTE : |
e871dd18 | 2488 | value |= ((uword64)mem[--index] << 0); |
8bae0a0c JSC |
2489 | break; |
2490 | } | |
2491 | } | |
2492 | ||
2493 | #ifdef DEBUG | |
53b9417e | 2494 | printf("DBG: LoadMemory() : (offset %d) : value = 0x%s%s\n", |
87e43259 | 2495 | (int)(pAddr & LOADDRMASK),pr_uword64(value1),pr_uword64(value)); |
8bae0a0c JSC |
2496 | #endif /* DEBUG */ |
2497 | ||
2498 | /* TODO: We could try and avoid the shifts when dealing with raw | |
2499 | memory accesses. This would mean updating the LoadMemory and | |
2500 | StoreMemory routines to avoid shifting the data before | |
2501 | returning or using it. */ | |
53b9417e DE |
2502 | if (AccessLength <= AccessLength_DOUBLEWORD) { |
2503 | if (!raw) { /* do nothing for raw accessess */ | |
2504 | if (BigEndianMem) | |
2505 | value <<= (((7 - (pAddr & LOADDRMASK)) - AccessLength) * 8); | |
2506 | else /* little-endian only needs to be shifted up to the correct byte offset */ | |
2507 | value <<= ((pAddr & LOADDRMASK) * 8); | |
2508 | } | |
8bae0a0c JSC |
2509 | } |
2510 | ||
2511 | #ifdef DEBUG | |
53b9417e | 2512 | printf("DBG: LoadMemory() : shifted value = 0x%s%s\n", |
87e43259 | 2513 | pr_uword64(value1),pr_uword64(value)); |
e871dd18 | 2514 | #endif /* DEBUG */ |
8bae0a0c JSC |
2515 | } |
2516 | } | |
2517 | ||
53b9417e DE |
2518 | *memvalp = value; |
2519 | if (memval1p) *memval1p = value1; | |
8bae0a0c JSC |
2520 | } |
2521 | ||
53b9417e | 2522 | |
50a2a691 AC |
2523 | /* Description from page A-23 of the "MIPS IV Instruction Set" manual |
2524 | (revision 3.1) */ | |
8bae0a0c JSC |
2525 | /* Store a value to memory. The specified data is stored into the |
2526 | physical location pAddr using the memory hierarchy (data caches and | |
2527 | main memory) as specified by the Cache Coherence Algorithm | |
2528 | (CCA). The MemElem contains the data for an aligned, fixed-width | |
2529 | memory element (word for 32-bit processors, doubleword for 64-bit | |
2530 | processors), though only the bytes that will actually be stored to | |
2531 | memory need to be valid. The low-order two (or three) bits of pAddr | |
2532 | and the AccessLength field indicates which of the bytes within the | |
2533 | MemElem data should actually be stored; only these bytes in memory | |
2534 | will be changed. */ | |
53b9417e | 2535 | |
8bae0a0c | 2536 | static void |
53b9417e | 2537 | StoreMemory(CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr,raw) |
8bae0a0c JSC |
2538 | int CCA; |
2539 | int AccessLength; | |
e871dd18 | 2540 | uword64 MemElem; |
53b9417e | 2541 | uword64 MemElem1; /* High order 64 bits */ |
e871dd18 JSC |
2542 | uword64 pAddr; |
2543 | uword64 vAddr; | |
8bae0a0c JSC |
2544 | int raw; |
2545 | { | |
50a2a691 | 2546 | SIM_DESC sd = &simulator; |
8bae0a0c | 2547 | #ifdef DEBUG |
87e43259 | 2548 | callback->printf_filtered(callback,"DBG: StoreMemory(%d,%d,0x%s,0x%s,0x%s,0x%s,%s)\n",CCA,AccessLength,pr_uword64(MemElem),pr_uword64(MemElem1),pr_addr(pAddr),pr_addr(vAddr),(raw ? "isRAW" : "isREAL")); |
8bae0a0c JSC |
2549 | #endif /* DEBUG */ |
2550 | ||
2551 | #if defined(WARN_MEM) | |
2552 | if (CCA != uncached) | |
f24b7b69 | 2553 | sim_warning("StoreMemory CCA (%d) is not uncached (currently all accesses treated as cached)",CCA); |
8bae0a0c JSC |
2554 | |
2555 | if (((pAddr & LOADDRMASK) + AccessLength) > LOADDRMASK) | |
53b9417e | 2556 | sim_error("AccessLength of %d would extend over %dbit aligned boundary for physical address 0x%s\n",AccessLength,(LOADDRMASK + 1)<<2,pr_addr(pAddr)); |
8bae0a0c JSC |
2557 | #endif /* WARN_MEM */ |
2558 | ||
2559 | #if defined(TRACE) | |
2560 | if (!raw) | |
2561 | dotrace(tracefh,1,(unsigned int)(pAddr&0xFFFFFFFF),(AccessLength + 1),"store"); | |
2562 | #endif /* TRACE */ | |
2563 | ||
2564 | /* See the comments in the LoadMemory routine about optimising | |
2565 | memory accesses. Also if we wanted to make the simulator smaller, | |
2566 | we could merge a lot of this code with the LoadMemory | |
2567 | routine. However, this would slow the simulator down with | |
2568 | run-time conditionals. */ | |
2569 | { | |
50a2a691 | 2570 | unsigned int index = 0; |
8bae0a0c JSC |
2571 | unsigned char *mem = NULL; |
2572 | ||
50a2a691 AC |
2573 | if ((pAddr >= STATE_MEM_BASE (sd)) && (pAddr < (STATE_MEM_BASE (sd) + STATE_MEM_SIZE (sd)))) { |
2574 | index = ((unsigned int)(pAddr - STATE_MEM_BASE (sd)) & (STATE_MEM_SIZE (sd) - 1)); | |
2575 | mem = STATE_MEMORY (sd); | |
8bae0a0c JSC |
2576 | } else if ((pAddr >= monitor_base) && (pAddr < (monitor_base + monitor_size))) { |
2577 | index = ((unsigned int)(pAddr - monitor_base) & (monitor_size - 1)); | |
2578 | mem = monitor; | |
2579 | } | |
2580 | ||
2581 | if (mem == NULL) | |
53b9417e | 2582 | sim_error("Simulator memory not found for physical address 0x%s\n",pr_addr(pAddr)); |
8bae0a0c JSC |
2583 | else { |
2584 | int shift = 0; | |
2585 | ||
2586 | #ifdef DEBUG | |
87e43259 | 2587 | printf("DBG: StoreMemory: offset = %d MemElem = 0x%s%s\n",(unsigned int)(pAddr & LOADDRMASK),pr_uword64(MemElem1),pr_uword64(MemElem)); |
8bae0a0c JSC |
2588 | #endif /* DEBUG */ |
2589 | ||
53b9417e DE |
2590 | if (AccessLength <= AccessLength_DOUBLEWORD) { |
2591 | if (BigEndianMem) { | |
2592 | if (raw) | |
2593 | shift = ((7 - AccessLength) * 8); | |
2594 | else /* real memory access */ | |
2595 | shift = ((pAddr & LOADDRMASK) * 8); | |
2596 | MemElem <<= shift; | |
2597 | } else { | |
2598 | /* no need to shift raw little-endian data */ | |
2599 | if (!raw) | |
2600 | MemElem >>= ((pAddr & LOADDRMASK) * 8); | |
2601 | } | |
8bae0a0c JSC |
2602 | } |
2603 | ||
2604 | #ifdef DEBUG | |
87e43259 | 2605 | printf("DBG: StoreMemory: shift = %d MemElem = 0x%s%s\n",shift,pr_uword64(MemElem1),pr_uword64(MemElem)); |
8bae0a0c JSC |
2606 | #endif /* DEBUG */ |
2607 | ||
0049ba7a | 2608 | if (BigEndianMem) { |
8bae0a0c | 2609 | switch (AccessLength) { /* big-endian memory */ |
53b9417e DE |
2610 | case AccessLength_QUADWORD : |
2611 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2612 | MemElem1 <<= 8; | |
2613 | case 14 : | |
2614 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2615 | MemElem1 <<= 8; | |
2616 | case 13 : | |
2617 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2618 | MemElem1 <<= 8; | |
2619 | case 12 : | |
2620 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2621 | MemElem1 <<= 8; | |
2622 | case 11 : | |
2623 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2624 | MemElem1 <<= 8; | |
2625 | case 10 : | |
2626 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2627 | MemElem1 <<= 8; | |
2628 | case 9 : | |
2629 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2630 | MemElem1 <<= 8; | |
2631 | case 8 : | |
2632 | mem[index++] = (unsigned char)(MemElem1 >> 56); | |
2633 | ||
8bae0a0c JSC |
2634 | case AccessLength_DOUBLEWORD : |
2635 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2636 | MemElem <<= 8; | |
2637 | case AccessLength_SEPTIBYTE : | |
2638 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2639 | MemElem <<= 8; | |
2640 | case AccessLength_SEXTIBYTE : | |
2641 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2642 | MemElem <<= 8; | |
2643 | case AccessLength_QUINTIBYTE : | |
2644 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2645 | MemElem <<= 8; | |
2646 | case AccessLength_WORD : | |
2647 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2648 | MemElem <<= 8; | |
2649 | case AccessLength_TRIPLEBYTE : | |
2650 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2651 | MemElem <<= 8; | |
2652 | case AccessLength_HALFWORD : | |
2653 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2654 | MemElem <<= 8; | |
2655 | case AccessLength_BYTE : | |
2656 | mem[index++] = (unsigned char)(MemElem >> 56); | |
2657 | break; | |
2658 | } | |
2659 | } else { | |
2660 | index += (AccessLength + 1); | |
2661 | switch (AccessLength) { /* little-endian memory */ | |
53b9417e DE |
2662 | case AccessLength_QUADWORD : |
2663 | mem[--index] = (unsigned char)(MemElem1 >> 56); | |
2664 | case 14 : | |
2665 | mem[--index] = (unsigned char)(MemElem1 >> 48); | |
2666 | case 13 : | |
2667 | mem[--index] = (unsigned char)(MemElem1 >> 40); | |
2668 | case 12 : | |
2669 | mem[--index] = (unsigned char)(MemElem1 >> 32); | |
2670 | case 11 : | |
2671 | mem[--index] = (unsigned char)(MemElem1 >> 24); | |
2672 | case 10 : | |
2673 | mem[--index] = (unsigned char)(MemElem1 >> 16); | |
2674 | case 9 : | |
2675 | mem[--index] = (unsigned char)(MemElem1 >> 8); | |
2676 | case 8 : | |
2677 | mem[--index] = (unsigned char)(MemElem1 >> 0); | |
2678 | ||
8bae0a0c JSC |
2679 | case AccessLength_DOUBLEWORD : |
2680 | mem[--index] = (unsigned char)(MemElem >> 56); | |
2681 | case AccessLength_SEPTIBYTE : | |
2682 | mem[--index] = (unsigned char)(MemElem >> 48); | |
2683 | case AccessLength_SEXTIBYTE : | |
2684 | mem[--index] = (unsigned char)(MemElem >> 40); | |
2685 | case AccessLength_QUINTIBYTE : | |
2686 | mem[--index] = (unsigned char)(MemElem >> 32); | |
2687 | case AccessLength_WORD : | |
2688 | mem[--index] = (unsigned char)(MemElem >> 24); | |
2689 | case AccessLength_TRIPLEBYTE : | |
2690 | mem[--index] = (unsigned char)(MemElem >> 16); | |
2691 | case AccessLength_HALFWORD : | |
2692 | mem[--index] = (unsigned char)(MemElem >> 8); | |
2693 | case AccessLength_BYTE : | |
2694 | mem[--index] = (unsigned char)(MemElem >> 0); | |
2695 | break; | |
2696 | } | |
2697 | } | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | return; | |
2702 | } | |
2703 | ||
53b9417e | 2704 | |
8bae0a0c JSC |
2705 | /* Description from page A-26 of the "MIPS IV Instruction Set" manual (revision 3.1) */ |
2706 | /* Order loads and stores to synchronise shared memory. Perform the | |
2707 | action necessary to make the effects of groups of synchronizable | |
2708 | loads and stores indicated by stype occur in the same order for all | |
2709 | processors. */ | |
2710 | static void | |
2711 | SyncOperation(stype) | |
2712 | int stype; | |
2713 | { | |
2714 | #ifdef DEBUG | |
2715 | callback->printf_filtered(callback,"SyncOperation(%d) : TODO\n",stype); | |
2716 | #endif /* DEBUG */ | |
2717 | return; | |
2718 | } | |
2719 | ||
2720 | /* Description from page A-26 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
2721 | /* Signal an exception condition. This will result in an exception | |
2722 | that aborts the instruction. The instruction operation pseudocode | |
50a2a691 | 2723 | will never see a return from this function call. */ |
2e61a3ad | 2724 | |
8bae0a0c | 2725 | static void |
e3d12c65 | 2726 | SignalException (int exception,...) |
8bae0a0c | 2727 | { |
2e61a3ad | 2728 | SIM_DESC sd = &simulator; |
8bae0a0c JSC |
2729 | /* Ensure that any active atomic read/modify/write operation will fail: */ |
2730 | LLBIT = 0; | |
2731 | ||
2732 | switch (exception) { | |
2733 | /* TODO: For testing purposes I have been ignoring TRAPs. In | |
2734 | reality we should either simulate them, or allow the user to | |
2735 | ignore them at run-time. */ | |
2736 | case Trap : | |
53b9417e | 2737 | sim_warning("Ignoring instruction TRAP (PC 0x%s)",pr_addr(IPC)); |
8bae0a0c JSC |
2738 | break; |
2739 | ||
2740 | case ReservedInstruction : | |
2741 | { | |
2742 | va_list ap; | |
2743 | unsigned int instruction; | |
2744 | va_start(ap,exception); | |
2745 | instruction = va_arg(ap,unsigned int); | |
2746 | va_end(ap); | |
2747 | /* Provide simple monitor support using ReservedInstruction | |
2748 | exceptions. The following code simulates the fixed vector | |
2749 | entry points into the IDT monitor by causing a simulator | |
2750 | trap, performing the monitor operation, and returning to | |
2751 | the address held in the $ra register (standard PCS return | |
2752 | address). This means we only need to pre-load the vector | |
2753 | space with suitable instruction values. For systems were | |
2754 | actual trap instructions are used, we would not need to | |
2755 | perform this magic. */ | |
53b9417e DE |
2756 | if ((instruction & RSVD_INSTRUCTION_MASK) == RSVD_INSTRUCTION) { |
2757 | sim_monitor( ((instruction >> RSVD_INSTRUCTION_ARG_SHIFT) & RSVD_INSTRUCTION_ARG_MASK) ); | |
8bae0a0c JSC |
2758 | PC = RA; /* simulate the return from the vector entry */ |
2759 | /* NOTE: This assumes that a branch-and-link style | |
2760 | instruction was used to enter the vector (which is the | |
2761 | case with the current IDT monitor). */ | |
2e61a3ad | 2762 | sim_engine_restart (sd, STATE_CPU (sd, 0), NULL, NULL_CIA); |
7e6c297e ILT |
2763 | } |
2764 | /* Look for the mips16 entry and exit instructions, and | |
2765 | simulate a handler for them. */ | |
2766 | else if ((IPC & 1) != 0 | |
2767 | && (instruction & 0xf81f) == 0xe809 | |
7e6c297e ILT |
2768 | && (instruction & 0x0c0) != 0x0c0) { |
2769 | mips16_entry (instruction); | |
2e61a3ad | 2770 | sim_engine_restart (sd, STATE_CPU (sd, 0), NULL, NULL_CIA); |
8bae0a0c | 2771 | } /* else fall through to normal exception processing */ |
53b9417e | 2772 | sim_warning("ReservedInstruction 0x%08X at IPC = 0x%s",instruction,pr_addr(IPC)); |
8bae0a0c JSC |
2773 | } |
2774 | ||
2775 | default: | |
e3d12c65 | 2776 | #ifdef DEBUG |
f24b7b69 | 2777 | if (exception != BreakPoint) |
53b9417e | 2778 | callback->printf_filtered(callback,"DBG: SignalException(%d) IPC = 0x%s\n",exception,pr_addr(IPC)); |
8bae0a0c JSC |
2779 | #endif /* DEBUG */ |
2780 | /* Store exception code into current exception id variable (used | |
2781 | by exit code): */ | |
2782 | ||
2783 | /* TODO: If not simulating exceptions then stop the simulator | |
2784 | execution. At the moment we always stop the simulation. */ | |
2e61a3ad | 2785 | /* state |= (simSTOP | simEXCEPTION); */ |
e3d12c65 DE |
2786 | |
2787 | /* Keep a copy of the current A0 in-case this is the program exit | |
2788 | breakpoint: */ | |
2789 | if (exception == BreakPoint) { | |
2790 | va_list ap; | |
2791 | unsigned int instruction; | |
2792 | va_start(ap,exception); | |
2793 | instruction = va_arg(ap,unsigned int); | |
2794 | va_end(ap); | |
2795 | /* Check for our special terminating BREAK: */ | |
2796 | if ((instruction & 0x03FFFFC0) == 0x03ff0000) { | |
2e61a3ad AC |
2797 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, |
2798 | sim_exited, (unsigned int)(A0 & 0xFFFFFFFF)); | |
e3d12c65 DE |
2799 | } |
2800 | } | |
2801 | ||
2802 | /* Store exception code into current exception id variable (used | |
2803 | by exit code): */ | |
8bae0a0c JSC |
2804 | CAUSE = (exception << 2); |
2805 | if (state & simDELAYSLOT) { | |
2806 | CAUSE |= cause_BD; | |
2807 | EPC = (IPC - 4); /* reference the branch instruction */ | |
2808 | } else | |
2809 | EPC = IPC; | |
2810 | /* The following is so that the simulator will continue from the | |
2811 | exception address on breakpoint operations. */ | |
2812 | PC = EPC; | |
50a2a691 AC |
2813 | switch ((CAUSE >> 2) & 0x1F) |
2814 | { | |
2815 | case Interrupt: | |
2816 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, | |
2817 | sim_stopped, SIGINT); | |
2818 | ||
2819 | case TLBModification: | |
2820 | case TLBLoad: | |
2821 | case TLBStore: | |
2822 | case AddressLoad: | |
2823 | case AddressStore: | |
2824 | case InstructionFetch: | |
2825 | case DataReference: | |
2826 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, | |
2827 | sim_stopped, SIGBUS); | |
2828 | ||
2829 | case ReservedInstruction: | |
2830 | case CoProcessorUnusable: | |
2831 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, | |
2832 | sim_stopped, SIGILL); | |
2833 | ||
2834 | case IntegerOverflow: | |
2835 | case FPE: | |
2836 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, | |
2837 | sim_stopped, SIGFPE); | |
2838 | ||
2839 | case Trap: | |
2840 | case Watch: | |
2841 | case SystemCall: | |
2842 | case BreakPoint: | |
2843 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, | |
2844 | sim_stopped, SIGTRAP); | |
2845 | ||
2846 | default : /* Unknown internal exception */ | |
2847 | sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, | |
2848 | sim_stopped, SIGQUIT); | |
2849 | ||
2850 | } | |
8bae0a0c JSC |
2851 | |
2852 | case SimulatorFault: | |
2853 | { | |
2854 | va_list ap; | |
2855 | char *msg; | |
2856 | va_start(ap,exception); | |
2857 | msg = va_arg(ap,char *); | |
50a2a691 | 2858 | va_end(ap); |
2e61a3ad AC |
2859 | sim_engine_abort (sd, STATE_CPU (sd, 0), NULL_CIA, |
2860 | "FATAL: Simulator error \"%s\"\n",msg); | |
8bae0a0c | 2861 | } |
8bae0a0c JSC |
2862 | } |
2863 | ||
2864 | return; | |
2865 | } | |
2866 | ||
2867 | #if defined(WARN_RESULT) | |
2868 | /* Description from page A-26 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
2869 | /* This function indicates that the result of the operation is | |
2870 | undefined. However, this should not affect the instruction | |
2871 | stream. All that is meant to happen is that the destination | |
2872 | register is set to an undefined result. To keep the simulator | |
2873 | simple, we just don't bother updating the destination register, so | |
2874 | the overall result will be undefined. If desired we can stop the | |
2875 | simulator by raising a pseudo-exception. */ | |
2876 | static void | |
2877 | UndefinedResult() | |
2878 | { | |
53b9417e | 2879 | sim_warning("UndefinedResult: IPC = 0x%s",pr_addr(IPC)); |
8bae0a0c JSC |
2880 | #if 0 /* Disabled for the moment, since it actually happens a lot at the moment. */ |
2881 | state |= simSTOP; | |
2882 | #endif | |
2883 | return; | |
2884 | } | |
2885 | #endif /* WARN_RESULT */ | |
2886 | ||
50a2a691 | 2887 | static void UNUSED |
8bae0a0c JSC |
2888 | CacheOp(op,pAddr,vAddr,instruction) |
2889 | int op; | |
e871dd18 JSC |
2890 | uword64 pAddr; |
2891 | uword64 vAddr; | |
8bae0a0c JSC |
2892 | unsigned int instruction; |
2893 | { | |
f24b7b69 JSC |
2894 | #if 1 /* stop warning message being displayed (we should really just remove the code) */ |
2895 | static int icache_warning = 1; | |
2896 | static int dcache_warning = 1; | |
2897 | #else | |
a9f7253f JSC |
2898 | static int icache_warning = 0; |
2899 | static int dcache_warning = 0; | |
f24b7b69 | 2900 | #endif |
a9f7253f | 2901 | |
8bae0a0c JSC |
2902 | /* If CP0 is not useable (User or Supervisor mode) and the CP0 |
2903 | enable bit in the Status Register is clear - a coprocessor | |
2904 | unusable exception is taken. */ | |
a9f7253f | 2905 | #if 0 |
53b9417e | 2906 | callback->printf_filtered(callback,"TODO: Cache availability checking (PC = 0x%s)\n",pr_addr(IPC)); |
a9f7253f | 2907 | #endif |
8bae0a0c JSC |
2908 | |
2909 | switch (op & 0x3) { | |
2910 | case 0: /* instruction cache */ | |
2911 | switch (op >> 2) { | |
2912 | case 0: /* Index Invalidate */ | |
2913 | case 1: /* Index Load Tag */ | |
2914 | case 2: /* Index Store Tag */ | |
2915 | case 4: /* Hit Invalidate */ | |
2916 | case 5: /* Fill */ | |
2917 | case 6: /* Hit Writeback */ | |
a9f7253f JSC |
2918 | if (!icache_warning) |
2919 | { | |
f24b7b69 | 2920 | sim_warning("Instruction CACHE operation %d to be coded",(op >> 2)); |
a9f7253f JSC |
2921 | icache_warning = 1; |
2922 | } | |
8bae0a0c JSC |
2923 | break; |
2924 | ||
2925 | default: | |
2926 | SignalException(ReservedInstruction,instruction); | |
2927 | break; | |
2928 | } | |
2929 | break; | |
2930 | ||
2931 | case 1: /* data cache */ | |
2932 | switch (op >> 2) { | |
2933 | case 0: /* Index Writeback Invalidate */ | |
2934 | case 1: /* Index Load Tag */ | |
2935 | case 2: /* Index Store Tag */ | |
2936 | case 3: /* Create Dirty */ | |
2937 | case 4: /* Hit Invalidate */ | |
2938 | case 5: /* Hit Writeback Invalidate */ | |
2939 | case 6: /* Hit Writeback */ | |
a9f7253f JSC |
2940 | if (!dcache_warning) |
2941 | { | |
f24b7b69 | 2942 | sim_warning("Data CACHE operation %d to be coded",(op >> 2)); |
a9f7253f JSC |
2943 | dcache_warning = 1; |
2944 | } | |
8bae0a0c JSC |
2945 | break; |
2946 | ||
2947 | default: | |
2948 | SignalException(ReservedInstruction,instruction); | |
2949 | break; | |
2950 | } | |
2951 | break; | |
2952 | ||
2953 | default: /* unrecognised cache ID */ | |
2954 | SignalException(ReservedInstruction,instruction); | |
2955 | break; | |
2956 | } | |
2957 | ||
2958 | return; | |
2959 | } | |
2960 | ||
2961 | /*-- FPU support routines ---------------------------------------------------*/ | |
2962 | ||
2963 | #if defined(HASFPU) /* Only needed when building FPU aware simulators */ | |
2964 | ||
2965 | #if 1 | |
2966 | #define SizeFGR() (GPRLEN) | |
2967 | #else | |
2968 | /* They depend on the CPU being simulated */ | |
2969 | #define SizeFGR() ((PROCESSOR_64BIT && ((SR & status_FR) == 1)) ? 64 : 32) | |
2970 | #endif | |
2971 | ||
2972 | /* Numbers are held in normalized form. The SINGLE and DOUBLE binary | |
2973 | formats conform to ANSI/IEEE Std 754-1985. */ | |
2974 | /* SINGLE precision floating: | |
2975 | * seeeeeeeefffffffffffffffffffffff | |
2976 | * s = 1bit = sign | |
2977 | * e = 8bits = exponent | |
2978 | * f = 23bits = fraction | |
2979 | */ | |
2980 | /* SINGLE precision fixed: | |
2981 | * siiiiiiiiiiiiiiiiiiiiiiiiiiiiiii | |
2982 | * s = 1bit = sign | |
2983 | * i = 31bits = integer | |
2984 | */ | |
2985 | /* DOUBLE precision floating: | |
2986 | * seeeeeeeeeeeffffffffffffffffffffffffffffffffffffffffffffffffffff | |
2987 | * s = 1bit = sign | |
2988 | * e = 11bits = exponent | |
2989 | * f = 52bits = fraction | |
2990 | */ | |
2991 | /* DOUBLE precision fixed: | |
2992 | * siiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii | |
2993 | * s = 1bit = sign | |
2994 | * i = 63bits = integer | |
2995 | */ | |
2996 | ||
2997 | /* Extract sign-bit: */ | |
2998 | #define FP_S_s(v) (((v) & ((unsigned)1 << 31)) ? 1 : 0) | |
e871dd18 | 2999 | #define FP_D_s(v) (((v) & ((uword64)1 << 63)) ? 1 : 0) |
8bae0a0c JSC |
3000 | /* Extract biased exponent: */ |
3001 | #define FP_S_be(v) (((v) >> 23) & 0xFF) | |
3002 | #define FP_D_be(v) (((v) >> 52) & 0x7FF) | |
3003 | /* Extract unbiased Exponent: */ | |
3004 | #define FP_S_e(v) (FP_S_be(v) - 0x7F) | |
3005 | #define FP_D_e(v) (FP_D_be(v) - 0x3FF) | |
3006 | /* Extract complete fraction field: */ | |
3007 | #define FP_S_f(v) ((v) & ~((unsigned)0x1FF << 23)) | |
e871dd18 | 3008 | #define FP_D_f(v) ((v) & ~((uword64)0xFFF << 52)) |
8bae0a0c JSC |
3009 | /* Extract numbered fraction bit: */ |
3010 | #define FP_S_fb(b,v) (((v) & (1 << (23 - (b)))) ? 1 : 0) | |
3011 | #define FP_D_fb(b,v) (((v) & (1 << (52 - (b)))) ? 1 : 0) | |
3012 | ||
3013 | /* Explicit QNaN values used when value required: */ | |
3014 | #define FPQNaN_SINGLE (0x7FBFFFFF) | |
3015 | #define FPQNaN_WORD (0x7FFFFFFF) | |
e871dd18 JSC |
3016 | #define FPQNaN_DOUBLE (((uword64)0x7FF7FFFF << 32) | 0xFFFFFFFF) |
3017 | #define FPQNaN_LONG (((uword64)0x7FFFFFFF << 32) | 0xFFFFFFFF) | |
8bae0a0c JSC |
3018 | |
3019 | /* Explicit Infinity values used when required: */ | |
3020 | #define FPINF_SINGLE (0x7F800000) | |
e871dd18 | 3021 | #define FPINF_DOUBLE (((uword64)0x7FF00000 << 32) | 0x00000000) |
8bae0a0c JSC |
3022 | |
3023 | #if 1 /* def DEBUG */ | |
3024 | #define RMMODE(v) (((v) == FP_RM_NEAREST) ? "Round" : (((v) == FP_RM_TOZERO) ? "Trunc" : (((v) == FP_RM_TOPINF) ? "Ceil" : "Floor"))) | |
3025 | #define DOFMT(v) (((v) == fmt_single) ? "single" : (((v) == fmt_double) ? "double" : (((v) == fmt_word) ? "word" : (((v) == fmt_long) ? "long" : (((v) == fmt_unknown) ? "<unknown>" : (((v) == fmt_uninterpreted) ? "<uninterpreted>" : "<format error>")))))) | |
3026 | #endif /* DEBUG */ | |
3027 | ||
e871dd18 | 3028 | static uword64 |
8bae0a0c JSC |
3029 | ValueFPR(fpr,fmt) |
3030 | int fpr; | |
3031 | FP_formats fmt; | |
3032 | { | |
50a2a691 | 3033 | uword64 value = 0; |
8bae0a0c JSC |
3034 | int err = 0; |
3035 | ||
3036 | /* Treat unused register values, as fixed-point 64bit values: */ | |
3037 | if ((fmt == fmt_uninterpreted) || (fmt == fmt_unknown)) | |
3038 | #if 1 | |
3039 | /* If request to read data as "uninterpreted", then use the current | |
3040 | encoding: */ | |
3041 | fmt = fpr_state[fpr]; | |
3042 | #else | |
3043 | fmt = fmt_long; | |
3044 | #endif | |
3045 | ||
3046 | /* For values not yet accessed, set to the desired format: */ | |
3047 | if (fpr_state[fpr] == fmt_uninterpreted) { | |
3048 | fpr_state[fpr] = fmt; | |
3049 | #ifdef DEBUG | |
3050 | printf("DBG: Register %d was fmt_uninterpreted. Now %s\n",fpr,DOFMT(fmt)); | |
3051 | #endif /* DEBUG */ | |
3052 | } | |
3053 | if (fmt != fpr_state[fpr]) { | |
53b9417e | 3054 | sim_warning("FPR %d (format %s) being accessed with format %s - setting to unknown (PC = 0x%s)",fpr,DOFMT(fpr_state[fpr]),DOFMT(fmt),pr_addr(IPC)); |
8bae0a0c JSC |
3055 | fpr_state[fpr] = fmt_unknown; |
3056 | } | |
3057 | ||
3058 | if (fpr_state[fpr] == fmt_unknown) { | |
3059 | /* Set QNaN value: */ | |
3060 | switch (fmt) { | |
3061 | case fmt_single: | |
3062 | value = FPQNaN_SINGLE; | |
3063 | break; | |
3064 | ||
3065 | case fmt_double: | |
3066 | value = FPQNaN_DOUBLE; | |
3067 | break; | |
3068 | ||
3069 | case fmt_word: | |
3070 | value = FPQNaN_WORD; | |
3071 | break; | |
3072 | ||
3073 | case fmt_long: | |
3074 | value = FPQNaN_LONG; | |
3075 | break; | |
3076 | ||
3077 | default: | |
3078 | err = -1; | |
3079 | break; | |
3080 | } | |
3081 | } else if (SizeFGR() == 64) { | |
3082 | switch (fmt) { | |
3083 | case fmt_single: | |
3084 | case fmt_word: | |
3085 | value = (FGR[fpr] & 0xFFFFFFFF); | |
3086 | break; | |
3087 | ||
3088 | case fmt_uninterpreted: | |
3089 | case fmt_double: | |
3090 | case fmt_long: | |
3091 | value = FGR[fpr]; | |
3092 | break; | |
3093 | ||
3094 | default : | |
3095 | err = -1; | |
3096 | break; | |
3097 | } | |
da0bce9c | 3098 | } else { |
8bae0a0c JSC |
3099 | switch (fmt) { |
3100 | case fmt_single: | |
3101 | case fmt_word: | |
3102 | value = (FGR[fpr] & 0xFFFFFFFF); | |
3103 | break; | |
3104 | ||
3105 | case fmt_uninterpreted: | |
3106 | case fmt_double: | |
3107 | case fmt_long: | |
da0bce9c ILT |
3108 | if ((fpr & 1) == 0) { /* even registers only */ |
3109 | value = ((((uword64)FGR[fpr+1]) << 32) | (FGR[fpr] & 0xFFFFFFFF)); | |
3110 | } else { | |
3111 | SignalException (ReservedInstruction, 0); | |
3112 | } | |
8bae0a0c JSC |
3113 | break; |
3114 | ||
3115 | default : | |
3116 | err = -1; | |
3117 | break; | |
3118 | } | |
3119 | } | |
3120 | ||
3121 | if (err) | |
3122 | SignalException(SimulatorFault,"Unrecognised FP format in ValueFPR()"); | |
3123 | ||
3124 | #ifdef DEBUG | |
53b9417e | 3125 | printf("DBG: ValueFPR: fpr = %d, fmt = %s, value = 0x%s : PC = 0x%s : SizeFGR() = %d\n",fpr,DOFMT(fmt),pr_addr(value),pr_addr(IPC),SizeFGR()); |
8bae0a0c JSC |
3126 | #endif /* DEBUG */ |
3127 | ||
3128 | return(value); | |
3129 | } | |
3130 | ||
3131 | static void | |
3132 | StoreFPR(fpr,fmt,value) | |
3133 | int fpr; | |
3134 | FP_formats fmt; | |
e871dd18 | 3135 | uword64 value; |
8bae0a0c JSC |
3136 | { |
3137 | int err = 0; | |
3138 | ||
3139 | #ifdef DEBUG | |
53b9417e | 3140 | printf("DBG: StoreFPR: fpr = %d, fmt = %s, value = 0x%s : PC = 0x%s : SizeFGR() = %d\n",fpr,DOFMT(fmt),pr_addr(value),pr_addr(IPC),SizeFGR()); |
8bae0a0c JSC |
3141 | #endif /* DEBUG */ |
3142 | ||
3143 | if (SizeFGR() == 64) { | |
3144 | switch (fmt) { | |
3145 | case fmt_single : | |
3146 | case fmt_word : | |
e871dd18 | 3147 | FGR[fpr] = (((uword64)0xDEADC0DE << 32) | (value & 0xFFFFFFFF)); |
8bae0a0c JSC |
3148 | fpr_state[fpr] = fmt; |
3149 | break; | |
3150 | ||
3151 | case fmt_uninterpreted: | |
3152 | case fmt_double : | |
3153 | case fmt_long : | |
3154 | FGR[fpr] = value; | |
3155 | fpr_state[fpr] = fmt; | |
3156 | break; | |
3157 | ||
3158 | default : | |
3159 | fpr_state[fpr] = fmt_unknown; | |
3160 | err = -1; | |
3161 | break; | |
3162 | } | |
da0bce9c | 3163 | } else { |
8bae0a0c JSC |
3164 | switch (fmt) { |
3165 | case fmt_single : | |
3166 | case fmt_word : | |
8bae0a0c | 3167 | FGR[fpr] = (value & 0xFFFFFFFF); |
8bae0a0c JSC |
3168 | fpr_state[fpr] = fmt; |
3169 | break; | |
3170 | ||
3171 | case fmt_uninterpreted: | |
3172 | case fmt_double : | |
3173 | case fmt_long : | |
da0bce9c ILT |
3174 | if ((fpr & 1) == 0) { /* even register number only */ |
3175 | FGR[fpr+1] = (value >> 32); | |
3176 | FGR[fpr] = (value & 0xFFFFFFFF); | |
3177 | fpr_state[fpr + 1] = fmt; | |
3178 | fpr_state[fpr] = fmt; | |
3179 | } else { | |
3180 | fpr_state[fpr] = fmt_unknown; | |
3181 | fpr_state[fpr + 1] = fmt_unknown; | |
3182 | SignalException (ReservedInstruction, 0); | |
3183 | } | |
8bae0a0c JSC |
3184 | break; |
3185 | ||
3186 | default : | |
3187 | fpr_state[fpr] = fmt_unknown; | |
3188 | err = -1; | |
3189 | break; | |
3190 | } | |
e871dd18 JSC |
3191 | } |
3192 | #if defined(WARN_RESULT) | |
3193 | else | |
3194 | UndefinedResult(); | |
3195 | #endif /* WARN_RESULT */ | |
8bae0a0c JSC |
3196 | |
3197 | if (err) | |
3198 | SignalException(SimulatorFault,"Unrecognised FP format in StoreFPR()"); | |
3199 | ||
3200 | #ifdef DEBUG | |
53b9417e | 3201 | printf("DBG: StoreFPR: fpr[%d] = 0x%s (format %s)\n",fpr,pr_addr(FGR[fpr]),DOFMT(fmt)); |
8bae0a0c JSC |
3202 | #endif /* DEBUG */ |
3203 | ||
3204 | return; | |
3205 | } | |
3206 | ||
3207 | static int | |
3208 | NaN(op,fmt) | |
e871dd18 | 3209 | uword64 op; |
8bae0a0c JSC |
3210 | FP_formats fmt; |
3211 | { | |
3212 | int boolean = 0; | |
3213 | ||
3214 | /* Check if (((E - bias) == (E_max + 1)) && (fraction != 0)). We | |
3215 | know that the exponent field is biased... we we cheat and avoid | |
3216 | removing the bias value. */ | |
3217 | switch (fmt) { | |
3218 | case fmt_single: | |
3219 | boolean = ((FP_S_be(op) == 0xFF) && (FP_S_f(op) != 0)); | |
3220 | /* We could use "FP_S_fb(1,op)" to ascertain whether we are | |
3221 | dealing with a SNaN or QNaN */ | |
3222 | break; | |
3223 | case fmt_double: | |
3224 | boolean = ((FP_D_be(op) == 0x7FF) && (FP_D_f(op) != 0)); | |
3225 | /* We could use "FP_S_fb(1,op)" to ascertain whether we are | |
3226 | dealing with a SNaN or QNaN */ | |
3227 | break; | |
3228 | case fmt_word: | |
3229 | boolean = (op == FPQNaN_WORD); | |
3230 | break; | |
3231 | case fmt_long: | |
3232 | boolean = (op == FPQNaN_LONG); | |
3233 | break; | |
50a2a691 AC |
3234 | default: |
3235 | fprintf (stderr, "Bad switch\n"); | |
3236 | abort (); | |
8bae0a0c JSC |
3237 | } |
3238 | ||
3239 | #ifdef DEBUG | |
53b9417e | 3240 | printf("DBG: NaN: returning %d for 0x%s (format = %s)\n",boolean,pr_addr(op),DOFMT(fmt)); |
8bae0a0c JSC |
3241 | #endif /* DEBUG */ |
3242 | ||
3243 | return(boolean); | |
3244 | } | |
3245 | ||
3246 | static int | |
3247 | Infinity(op,fmt) | |
e871dd18 | 3248 | uword64 op; |
8bae0a0c JSC |
3249 | FP_formats fmt; |
3250 | { | |
3251 | int boolean = 0; | |
3252 | ||
3253 | #ifdef DEBUG | |
53b9417e | 3254 | printf("DBG: Infinity: format %s 0x%s (PC = 0x%s)\n",DOFMT(fmt),pr_addr(op),pr_addr(IPC)); |
8bae0a0c JSC |
3255 | #endif /* DEBUG */ |
3256 | ||
3257 | /* Check if (((E - bias) == (E_max + 1)) && (fraction == 0)). We | |
3258 | know that the exponent field is biased... we we cheat and avoid | |
3259 | removing the bias value. */ | |
3260 | switch (fmt) { | |
3261 | case fmt_single: | |
3262 | boolean = ((FP_S_be(op) == 0xFF) && (FP_S_f(op) == 0)); | |
3263 | break; | |
3264 | case fmt_double: | |
3265 | boolean = ((FP_D_be(op) == 0x7FF) && (FP_D_f(op) == 0)); | |
3266 | break; | |
3267 | default: | |
3268 | printf("DBG: TODO: unrecognised format (%s) for Infinity check\n",DOFMT(fmt)); | |
3269 | break; | |
3270 | } | |
3271 | ||
3272 | #ifdef DEBUG | |
53b9417e | 3273 | printf("DBG: Infinity: returning %d for 0x%s (format = %s)\n",boolean,pr_addr(op),DOFMT(fmt)); |
8bae0a0c JSC |
3274 | #endif /* DEBUG */ |
3275 | ||
3276 | return(boolean); | |
3277 | } | |
3278 | ||
3279 | static int | |
3280 | Less(op1,op2,fmt) | |
e871dd18 JSC |
3281 | uword64 op1; |
3282 | uword64 op2; | |
8bae0a0c JSC |
3283 | FP_formats fmt; |
3284 | { | |
3285 | int boolean = 0; | |
3286 | ||
e871dd18 JSC |
3287 | /* Argument checking already performed by the FPCOMPARE code */ |
3288 | ||
8bae0a0c | 3289 | #ifdef DEBUG |
53b9417e | 3290 | printf("DBG: Less: %s: op1 = 0x%s : op2 = 0x%s\n",DOFMT(fmt),pr_addr(op1),pr_addr(op2)); |
8bae0a0c JSC |
3291 | #endif /* DEBUG */ |
3292 | ||
8bae0a0c JSC |
3293 | /* The format type should already have been checked: */ |
3294 | switch (fmt) { | |
3295 | case fmt_single: | |
3296 | { | |
3297 | unsigned int wop1 = (unsigned int)op1; | |
3298 | unsigned int wop2 = (unsigned int)op2; | |
3299 | boolean = (*(float *)&wop1 < *(float *)&wop2); | |
3300 | } | |
3301 | break; | |
3302 | case fmt_double: | |
3303 | boolean = (*(double *)&op1 < *(double *)&op2); | |
3304 | break; | |
50a2a691 AC |
3305 | default: |
3306 | fprintf (stderr, "Bad switch\n"); | |
3307 | abort (); | |
8bae0a0c JSC |
3308 | } |
3309 | ||
3310 | #ifdef DEBUG | |
3311 | printf("DBG: Less: returning %d (format = %s)\n",boolean,DOFMT(fmt)); | |
3312 | #endif /* DEBUG */ | |
3313 | ||
3314 | return(boolean); | |
3315 | } | |
3316 | ||
3317 | static int | |
3318 | Equal(op1,op2,fmt) | |
e871dd18 JSC |
3319 | uword64 op1; |
3320 | uword64 op2; | |
8bae0a0c JSC |
3321 | FP_formats fmt; |
3322 | { | |
3323 | int boolean = 0; | |
3324 | ||
e871dd18 JSC |
3325 | /* Argument checking already performed by the FPCOMPARE code */ |
3326 | ||
8bae0a0c | 3327 | #ifdef DEBUG |
53b9417e | 3328 | printf("DBG: Equal: %s: op1 = 0x%s : op2 = 0x%s\n",DOFMT(fmt),pr_addr(op1),pr_addr(op2)); |
8bae0a0c JSC |
3329 | #endif /* DEBUG */ |
3330 | ||
8bae0a0c JSC |
3331 | /* The format type should already have been checked: */ |
3332 | switch (fmt) { | |
3333 | case fmt_single: | |
3334 | boolean = ((op1 & 0xFFFFFFFF) == (op2 & 0xFFFFFFFF)); | |
3335 | break; | |
3336 | case fmt_double: | |
3337 | boolean = (op1 == op2); | |
3338 | break; | |
50a2a691 AC |
3339 | default: |
3340 | fprintf (stderr, "Bad switch\n"); | |
3341 | abort (); | |
8bae0a0c JSC |
3342 | } |
3343 | ||
3344 | #ifdef DEBUG | |
3345 | printf("DBG: Equal: returning %d (format = %s)\n",boolean,DOFMT(fmt)); | |
3346 | #endif /* DEBUG */ | |
3347 | ||
3348 | return(boolean); | |
3349 | } | |
3350 | ||
a9f7253f JSC |
3351 | static uword64 |
3352 | AbsoluteValue(op,fmt) | |
3353 | uword64 op; | |
3354 | FP_formats fmt; | |
3355 | { | |
50a2a691 | 3356 | uword64 result = 0; |
a9f7253f JSC |
3357 | |
3358 | #ifdef DEBUG | |
53b9417e | 3359 | printf("DBG: AbsoluteValue: %s: op = 0x%s\n",DOFMT(fmt),pr_addr(op)); |
a9f7253f JSC |
3360 | #endif /* DEBUG */ |
3361 | ||
3362 | /* The format type should already have been checked: */ | |
3363 | switch (fmt) { | |
3364 | case fmt_single: | |
3365 | { | |
3366 | unsigned int wop = (unsigned int)op; | |
3367 | float tmp = ((float)fabs((double)*(float *)&wop)); | |
3368 | result = (uword64)*(unsigned int *)&tmp; | |
3369 | } | |
3370 | break; | |
3371 | case fmt_double: | |
3372 | { | |
3373 | double tmp = (fabs(*(double *)&op)); | |
3374 | result = *(uword64 *)&tmp; | |
3375 | } | |
50a2a691 AC |
3376 | default: |
3377 | fprintf (stderr, "Bad switch\n"); | |
3378 | abort (); | |
a9f7253f JSC |
3379 | } |
3380 | ||
3381 | return(result); | |
3382 | } | |
3383 | ||
e871dd18 | 3384 | static uword64 |
8bae0a0c | 3385 | Negate(op,fmt) |
e871dd18 | 3386 | uword64 op; |
8bae0a0c JSC |
3387 | FP_formats fmt; |
3388 | { | |
50a2a691 | 3389 | uword64 result = 0; |
8bae0a0c JSC |
3390 | |
3391 | #ifdef DEBUG | |
53b9417e | 3392 | printf("DBG: Negate: %s: op = 0x%s\n",DOFMT(fmt),pr_addr(op)); |
8bae0a0c JSC |
3393 | #endif /* DEBUG */ |
3394 | ||
3395 | /* The format type should already have been checked: */ | |
3396 | switch (fmt) { | |
3397 | case fmt_single: | |
3398 | { | |
3399 | unsigned int wop = (unsigned int)op; | |
3400 | float tmp = ((float)0.0 - *(float *)&wop); | |
e871dd18 | 3401 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3402 | } |
3403 | break; | |
3404 | case fmt_double: | |
3405 | { | |
3406 | double tmp = ((double)0.0 - *(double *)&op); | |
e871dd18 | 3407 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3408 | } |
3409 | break; | |
50a2a691 AC |
3410 | default: |
3411 | fprintf (stderr, "Bad switch\n"); | |
3412 | abort (); | |
8bae0a0c JSC |
3413 | } |
3414 | ||
3415 | return(result); | |
3416 | } | |
3417 | ||
e871dd18 | 3418 | static uword64 |
8bae0a0c | 3419 | Add(op1,op2,fmt) |
e871dd18 JSC |
3420 | uword64 op1; |
3421 | uword64 op2; | |
8bae0a0c JSC |
3422 | FP_formats fmt; |
3423 | { | |
50a2a691 | 3424 | uword64 result = 0; |
8bae0a0c JSC |
3425 | |
3426 | #ifdef DEBUG | |
53b9417e | 3427 | printf("DBG: Add: %s: op1 = 0x%s : op2 = 0x%s\n",DOFMT(fmt),pr_addr(op1),pr_addr(op2)); |
8bae0a0c JSC |
3428 | #endif /* DEBUG */ |
3429 | ||
e871dd18 JSC |
3430 | /* The registers must specify FPRs valid for operands of type |
3431 | "fmt". If they are not valid, the result is undefined. */ | |
8bae0a0c JSC |
3432 | |
3433 | /* The format type should already have been checked: */ | |
3434 | switch (fmt) { | |
3435 | case fmt_single: | |
3436 | { | |
3437 | unsigned int wop1 = (unsigned int)op1; | |
3438 | unsigned int wop2 = (unsigned int)op2; | |
3439 | float tmp = (*(float *)&wop1 + *(float *)&wop2); | |
e871dd18 | 3440 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3441 | } |
3442 | break; | |
3443 | case fmt_double: | |
3444 | { | |
3445 | double tmp = (*(double *)&op1 + *(double *)&op2); | |
e871dd18 | 3446 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3447 | } |
3448 | break; | |
50a2a691 AC |
3449 | default: |
3450 | fprintf (stderr, "Bad switch\n"); | |
3451 | abort (); | |
8bae0a0c JSC |
3452 | } |
3453 | ||
3454 | #ifdef DEBUG | |
53b9417e | 3455 | printf("DBG: Add: returning 0x%s (format = %s)\n",pr_addr(result),DOFMT(fmt)); |
8bae0a0c JSC |
3456 | #endif /* DEBUG */ |
3457 | ||
3458 | return(result); | |
3459 | } | |
3460 | ||
e871dd18 | 3461 | static uword64 |
8bae0a0c | 3462 | Sub(op1,op2,fmt) |
e871dd18 JSC |
3463 | uword64 op1; |
3464 | uword64 op2; | |
8bae0a0c JSC |
3465 | FP_formats fmt; |
3466 | { | |
50a2a691 | 3467 | uword64 result = 0; |
8bae0a0c JSC |
3468 | |
3469 | #ifdef DEBUG | |
53b9417e | 3470 | printf("DBG: Sub: %s: op1 = 0x%s : op2 = 0x%s\n",DOFMT(fmt),pr_addr(op1),pr_addr(op2)); |
8bae0a0c JSC |
3471 | #endif /* DEBUG */ |
3472 | ||
e871dd18 JSC |
3473 | /* The registers must specify FPRs valid for operands of type |
3474 | "fmt". If they are not valid, the result is undefined. */ | |
8bae0a0c JSC |
3475 | |
3476 | /* The format type should already have been checked: */ | |
3477 | switch (fmt) { | |
3478 | case fmt_single: | |
3479 | { | |
3480 | unsigned int wop1 = (unsigned int)op1; | |
3481 | unsigned int wop2 = (unsigned int)op2; | |
3482 | float tmp = (*(float *)&wop1 - *(float *)&wop2); | |
e871dd18 | 3483 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3484 | } |
3485 | break; | |
3486 | case fmt_double: | |
3487 | { | |
3488 | double tmp = (*(double *)&op1 - *(double *)&op2); | |
e871dd18 | 3489 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3490 | } |
3491 | break; | |
50a2a691 AC |
3492 | default: |
3493 | fprintf (stderr, "Bad switch\n"); | |
3494 | abort (); | |
8bae0a0c JSC |
3495 | } |
3496 | ||
3497 | #ifdef DEBUG | |
53b9417e | 3498 | printf("DBG: Sub: returning 0x%s (format = %s)\n",pr_addr(result),DOFMT(fmt)); |
8bae0a0c JSC |
3499 | #endif /* DEBUG */ |
3500 | ||
3501 | return(result); | |
3502 | } | |
3503 | ||
e871dd18 | 3504 | static uword64 |
8bae0a0c | 3505 | Multiply(op1,op2,fmt) |
e871dd18 JSC |
3506 | uword64 op1; |
3507 | uword64 op2; | |
8bae0a0c JSC |
3508 | FP_formats fmt; |
3509 | { | |
50a2a691 | 3510 | uword64 result = 0; |
8bae0a0c JSC |
3511 | |
3512 | #ifdef DEBUG | |
53b9417e | 3513 | printf("DBG: Multiply: %s: op1 = 0x%s : op2 = 0x%s\n",DOFMT(fmt),pr_addr(op1),pr_addr(op2)); |
8bae0a0c JSC |
3514 | #endif /* DEBUG */ |
3515 | ||
e871dd18 JSC |
3516 | /* The registers must specify FPRs valid for operands of type |
3517 | "fmt". If they are not valid, the result is undefined. */ | |
8bae0a0c JSC |
3518 | |
3519 | /* The format type should already have been checked: */ | |
3520 | switch (fmt) { | |
3521 | case fmt_single: | |
3522 | { | |
3523 | unsigned int wop1 = (unsigned int)op1; | |
3524 | unsigned int wop2 = (unsigned int)op2; | |
3525 | float tmp = (*(float *)&wop1 * *(float *)&wop2); | |
e871dd18 | 3526 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3527 | } |
3528 | break; | |
3529 | case fmt_double: | |
3530 | { | |
3531 | double tmp = (*(double *)&op1 * *(double *)&op2); | |
e871dd18 | 3532 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3533 | } |
3534 | break; | |
50a2a691 AC |
3535 | default: |
3536 | fprintf (stderr, "Bad switch\n"); | |
3537 | abort (); | |
8bae0a0c JSC |
3538 | } |
3539 | ||
3540 | #ifdef DEBUG | |
53b9417e | 3541 | printf("DBG: Multiply: returning 0x%s (format = %s)\n",pr_addr(result),DOFMT(fmt)); |
8bae0a0c JSC |
3542 | #endif /* DEBUG */ |
3543 | ||
3544 | return(result); | |
3545 | } | |
3546 | ||
e871dd18 | 3547 | static uword64 |
8bae0a0c | 3548 | Divide(op1,op2,fmt) |
e871dd18 JSC |
3549 | uword64 op1; |
3550 | uword64 op2; | |
8bae0a0c JSC |
3551 | FP_formats fmt; |
3552 | { | |
50a2a691 | 3553 | uword64 result = 0; |
8bae0a0c JSC |
3554 | |
3555 | #ifdef DEBUG | |
53b9417e | 3556 | printf("DBG: Divide: %s: op1 = 0x%s : op2 = 0x%s\n",DOFMT(fmt),pr_addr(op1),pr_addr(op2)); |
8bae0a0c JSC |
3557 | #endif /* DEBUG */ |
3558 | ||
e871dd18 JSC |
3559 | /* The registers must specify FPRs valid for operands of type |
3560 | "fmt". If they are not valid, the result is undefined. */ | |
8bae0a0c JSC |
3561 | |
3562 | /* The format type should already have been checked: */ | |
3563 | switch (fmt) { | |
3564 | case fmt_single: | |
3565 | { | |
3566 | unsigned int wop1 = (unsigned int)op1; | |
3567 | unsigned int wop2 = (unsigned int)op2; | |
3568 | float tmp = (*(float *)&wop1 / *(float *)&wop2); | |
e871dd18 | 3569 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3570 | } |
3571 | break; | |
3572 | case fmt_double: | |
3573 | { | |
3574 | double tmp = (*(double *)&op1 / *(double *)&op2); | |
e871dd18 | 3575 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3576 | } |
3577 | break; | |
50a2a691 AC |
3578 | default: |
3579 | fprintf (stderr, "Bad switch\n"); | |
3580 | abort (); | |
8bae0a0c JSC |
3581 | } |
3582 | ||
3583 | #ifdef DEBUG | |
53b9417e | 3584 | printf("DBG: Divide: returning 0x%s (format = %s)\n",pr_addr(result),DOFMT(fmt)); |
8bae0a0c JSC |
3585 | #endif /* DEBUG */ |
3586 | ||
3587 | return(result); | |
3588 | } | |
3589 | ||
50a2a691 | 3590 | static uword64 UNUSED |
8bae0a0c | 3591 | Recip(op,fmt) |
e871dd18 | 3592 | uword64 op; |
8bae0a0c JSC |
3593 | FP_formats fmt; |
3594 | { | |
50a2a691 | 3595 | uword64 result = 0; |
8bae0a0c JSC |
3596 | |
3597 | #ifdef DEBUG | |
53b9417e | 3598 | printf("DBG: Recip: %s: op = 0x%s\n",DOFMT(fmt),pr_addr(op)); |
8bae0a0c JSC |
3599 | #endif /* DEBUG */ |
3600 | ||
e871dd18 JSC |
3601 | /* The registers must specify FPRs valid for operands of type |
3602 | "fmt". If they are not valid, the result is undefined. */ | |
8bae0a0c JSC |
3603 | |
3604 | /* The format type should already have been checked: */ | |
3605 | switch (fmt) { | |
3606 | case fmt_single: | |
3607 | { | |
3608 | unsigned int wop = (unsigned int)op; | |
3609 | float tmp = ((float)1.0 / *(float *)&wop); | |
e871dd18 | 3610 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3611 | } |
3612 | break; | |
3613 | case fmt_double: | |
3614 | { | |
3615 | double tmp = ((double)1.0 / *(double *)&op); | |
e871dd18 | 3616 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3617 | } |
3618 | break; | |
50a2a691 AC |
3619 | default: |
3620 | fprintf (stderr, "Bad switch\n"); | |
3621 | abort (); | |
8bae0a0c JSC |
3622 | } |
3623 | ||
3624 | #ifdef DEBUG | |
53b9417e | 3625 | printf("DBG: Recip: returning 0x%s (format = %s)\n",pr_addr(result),DOFMT(fmt)); |
8bae0a0c JSC |
3626 | #endif /* DEBUG */ |
3627 | ||
3628 | return(result); | |
3629 | } | |
3630 | ||
e871dd18 | 3631 | static uword64 |
8bae0a0c | 3632 | SquareRoot(op,fmt) |
e871dd18 | 3633 | uword64 op; |
8bae0a0c JSC |
3634 | FP_formats fmt; |
3635 | { | |
50a2a691 | 3636 | uword64 result = 0; |
8bae0a0c JSC |
3637 | |
3638 | #ifdef DEBUG | |
53b9417e | 3639 | printf("DBG: SquareRoot: %s: op = 0x%s\n",DOFMT(fmt),pr_addr(op)); |
8bae0a0c JSC |
3640 | #endif /* DEBUG */ |
3641 | ||
e871dd18 JSC |
3642 | /* The registers must specify FPRs valid for operands of type |
3643 | "fmt". If they are not valid, the result is undefined. */ | |
8bae0a0c JSC |
3644 | |
3645 | /* The format type should already have been checked: */ | |
3646 | switch (fmt) { | |
3647 | case fmt_single: | |
3648 | { | |
3649 | unsigned int wop = (unsigned int)op; | |
e3d12c65 | 3650 | #ifdef HAVE_SQRT |
8bae0a0c | 3651 | float tmp = ((float)sqrt((double)*(float *)&wop)); |
e871dd18 | 3652 | result = (uword64)*(unsigned int *)&tmp; |
e3d12c65 DE |
3653 | #else |
3654 | /* TODO: Provide square-root */ | |
3655 | result = (uword64)0; | |
3656 | #endif | |
8bae0a0c JSC |
3657 | } |
3658 | break; | |
3659 | case fmt_double: | |
3660 | { | |
e3d12c65 | 3661 | #ifdef HAVE_SQRT |
8bae0a0c | 3662 | double tmp = (sqrt(*(double *)&op)); |
e871dd18 | 3663 | result = *(uword64 *)&tmp; |
e3d12c65 DE |
3664 | #else |
3665 | /* TODO: Provide square-root */ | |
3666 | result = (uword64)0; | |
3667 | #endif | |
8bae0a0c JSC |
3668 | } |
3669 | break; | |
50a2a691 AC |
3670 | default: |
3671 | fprintf (stderr, "Bad switch\n"); | |
3672 | abort (); | |
8bae0a0c JSC |
3673 | } |
3674 | ||
3675 | #ifdef DEBUG | |
53b9417e | 3676 | printf("DBG: SquareRoot: returning 0x%s (format = %s)\n",pr_addr(result),DOFMT(fmt)); |
8bae0a0c JSC |
3677 | #endif /* DEBUG */ |
3678 | ||
3679 | return(result); | |
3680 | } | |
3681 | ||
e871dd18 | 3682 | static uword64 |
8bae0a0c JSC |
3683 | Convert(rm,op,from,to) |
3684 | int rm; | |
e871dd18 | 3685 | uword64 op; |
8bae0a0c JSC |
3686 | FP_formats from; |
3687 | FP_formats to; | |
3688 | { | |
50a2a691 | 3689 | uword64 result = 0; |
8bae0a0c JSC |
3690 | |
3691 | #ifdef DEBUG | |
53b9417e | 3692 | printf("DBG: Convert: mode %s : op 0x%s : from %s : to %s : (PC = 0x%s)\n",RMMODE(rm),pr_addr(op),DOFMT(from),DOFMT(to),pr_addr(IPC)); |
8bae0a0c JSC |
3693 | #endif /* DEBUG */ |
3694 | ||
3695 | /* The value "op" is converted to the destination format, rounding | |
3696 | using mode "rm". When the destination is a fixed-point format, | |
3697 | then a source value of Infinity, NaN or one which would round to | |
3698 | an integer outside the fixed point range then an IEEE Invalid | |
3699 | Operation condition is raised. */ | |
3700 | switch (to) { | |
3701 | case fmt_single: | |
3702 | { | |
3703 | float tmp; | |
3704 | switch (from) { | |
3705 | case fmt_double: | |
3706 | tmp = (float)(*(double *)&op); | |
3707 | break; | |
3708 | ||
3709 | case fmt_word: | |
3710 | tmp = (float)((int)(op & 0xFFFFFFFF)); | |
3711 | break; | |
3712 | ||
3713 | case fmt_long: | |
e3d12c65 | 3714 | tmp = (float)((word64)op); |
8bae0a0c | 3715 | break; |
50a2a691 AC |
3716 | default: |
3717 | fprintf (stderr, "Bad switch\n"); | |
3718 | abort (); | |
8bae0a0c JSC |
3719 | } |
3720 | ||
458e1f58 ILT |
3721 | #if 0 |
3722 | /* FIXME: This code is incorrect. The rounding mode does not | |
3723 | round to integral values; it rounds to the nearest | |
3724 | representable value in the format. */ | |
3725 | ||
8bae0a0c JSC |
3726 | switch (rm) { |
3727 | case FP_RM_NEAREST: | |
e871dd18 JSC |
3728 | /* Round result to nearest representable value. When two |
3729 | representable values are equally near, round to the value | |
3730 | that has a least significant bit of zero (i.e. is even). */ | |
4fa134be | 3731 | #ifdef HAVE_ANINT |
e871dd18 | 3732 | tmp = (float)anint((double)tmp); |
d0757082 JSC |
3733 | #else |
3734 | /* TODO: Provide round-to-nearest */ | |
3735 | #endif | |
8bae0a0c JSC |
3736 | break; |
3737 | ||
3738 | case FP_RM_TOZERO: | |
e871dd18 JSC |
3739 | /* Round result to the value closest to, and not greater in |
3740 | magnitude than, the result. */ | |
4fa134be | 3741 | #ifdef HAVE_AINT |
e871dd18 | 3742 | tmp = (float)aint((double)tmp); |
d0757082 JSC |
3743 | #else |
3744 | /* TODO: Provide round-to-zero */ | |
3745 | #endif | |
8bae0a0c JSC |
3746 | break; |
3747 | ||
3748 | case FP_RM_TOPINF: | |
e871dd18 JSC |
3749 | /* Round result to the value closest to, and not less than, |
3750 | the result. */ | |
3751 | tmp = (float)ceil((double)tmp); | |
8bae0a0c JSC |
3752 | break; |
3753 | ||
3754 | case FP_RM_TOMINF: | |
e871dd18 JSC |
3755 | /* Round result to the value closest to, and not greater than, |
3756 | the result. */ | |
3757 | tmp = (float)floor((double)tmp); | |
8bae0a0c JSC |
3758 | break; |
3759 | } | |
458e1f58 ILT |
3760 | #endif /* 0 */ |
3761 | ||
e871dd18 | 3762 | result = (uword64)*(unsigned int *)&tmp; |
8bae0a0c JSC |
3763 | } |
3764 | break; | |
3765 | ||
3766 | case fmt_double: | |
3767 | { | |
3768 | double tmp; | |
f24b7b69 | 3769 | word64 xxx; |
8bae0a0c JSC |
3770 | |
3771 | switch (from) { | |
3772 | case fmt_single: | |
3773 | { | |
3774 | unsigned int wop = (unsigned int)op; | |
3775 | tmp = (double)(*(float *)&wop); | |
3776 | } | |
3777 | break; | |
3778 | ||
3779 | case fmt_word: | |
f24b7b69 | 3780 | xxx = SIGNEXTEND((op & 0xFFFFFFFF),32); |
e3d12c65 | 3781 | tmp = (double)xxx; |
8bae0a0c JSC |
3782 | break; |
3783 | ||
3784 | case fmt_long: | |
e871dd18 | 3785 | tmp = (double)((word64)op); |
8bae0a0c | 3786 | break; |
50a2a691 AC |
3787 | |
3788 | default: | |
3789 | fprintf (stderr, "Bad switch\n"); | |
3790 | abort (); | |
8bae0a0c | 3791 | } |
e871dd18 | 3792 | |
458e1f58 ILT |
3793 | #if 0 |
3794 | /* FIXME: This code is incorrect. The rounding mode does not | |
3795 | round to integral values; it rounds to the nearest | |
3796 | representable value in the format. */ | |
3797 | ||
8bae0a0c JSC |
3798 | switch (rm) { |
3799 | case FP_RM_NEAREST: | |
4fa134be | 3800 | #ifdef HAVE_ANINT |
e871dd18 | 3801 | tmp = anint(*(double *)&tmp); |
d0757082 JSC |
3802 | #else |
3803 | /* TODO: Provide round-to-nearest */ | |
3804 | #endif | |
8bae0a0c JSC |
3805 | break; |
3806 | ||
3807 | case FP_RM_TOZERO: | |
4fa134be | 3808 | #ifdef HAVE_AINT |
e871dd18 | 3809 | tmp = aint(*(double *)&tmp); |
d0757082 JSC |
3810 | #else |
3811 | /* TODO: Provide round-to-zero */ | |
3812 | #endif | |
8bae0a0c JSC |
3813 | break; |
3814 | ||
3815 | case FP_RM_TOPINF: | |
3816 | tmp = ceil(*(double *)&tmp); | |
3817 | break; | |
3818 | ||
3819 | case FP_RM_TOMINF: | |
3820 | tmp = floor(*(double *)&tmp); | |
3821 | break; | |
3822 | } | |
458e1f58 ILT |
3823 | #endif /* 0 */ |
3824 | ||
e871dd18 | 3825 | result = *(uword64 *)&tmp; |
8bae0a0c JSC |
3826 | } |
3827 | break; | |
3828 | ||
3829 | case fmt_word: | |
3830 | case fmt_long: | |
3831 | if (Infinity(op,from) || NaN(op,from) || (1 == 0/*TODO: check range */)) { | |
3832 | printf("DBG: TODO: update FCSR\n"); | |
3833 | SignalException(FPE); | |
3834 | } else { | |
3835 | if (to == fmt_word) { | |
50a2a691 | 3836 | int tmp = 0; |
8bae0a0c JSC |
3837 | switch (from) { |
3838 | case fmt_single: | |
3839 | { | |
3840 | unsigned int wop = (unsigned int)op; | |
e3d12c65 | 3841 | tmp = (int)*((float *)&wop); |
8bae0a0c JSC |
3842 | } |
3843 | break; | |
3844 | case fmt_double: | |
e3d12c65 | 3845 | tmp = (int)*((double *)&op); |
8bae0a0c | 3846 | #ifdef DEBUG |
53b9417e | 3847 | printf("DBG: from double %.30f (0x%s) to word: 0x%08X\n",*((double *)&op),pr_addr(op),tmp); |
8bae0a0c JSC |
3848 | #endif /* DEBUG */ |
3849 | break; | |
50a2a691 AC |
3850 | default: |
3851 | fprintf (stderr, "Bad switch\n"); | |
3852 | abort (); | |
8bae0a0c | 3853 | } |
e871dd18 | 3854 | result = (uword64)tmp; |
8bae0a0c | 3855 | } else { /* fmt_long */ |
50a2a691 | 3856 | word64 tmp = 0; |
8bae0a0c JSC |
3857 | switch (from) { |
3858 | case fmt_single: | |
3859 | { | |
3860 | unsigned int wop = (unsigned int)op; | |
e3d12c65 | 3861 | tmp = (word64)*((float *)&wop); |
8bae0a0c JSC |
3862 | } |
3863 | break; | |
3864 | case fmt_double: | |
e3d12c65 | 3865 | tmp = (word64)*((double *)&op); |
8bae0a0c | 3866 | break; |
50a2a691 AC |
3867 | default: |
3868 | fprintf (stderr, "Bad switch\n"); | |
3869 | abort (); | |
8bae0a0c | 3870 | } |
e3d12c65 | 3871 | result = (uword64)tmp; |
8bae0a0c JSC |
3872 | } |
3873 | } | |
3874 | break; | |
50a2a691 AC |
3875 | default: |
3876 | fprintf (stderr, "Bad switch\n"); | |
3877 | abort (); | |
8bae0a0c JSC |
3878 | } |
3879 | ||
3880 | #ifdef DEBUG | |
53b9417e | 3881 | printf("DBG: Convert: returning 0x%s (to format = %s)\n",pr_addr(result),DOFMT(to)); |
8bae0a0c JSC |
3882 | #endif /* DEBUG */ |
3883 | ||
3884 | return(result); | |
3885 | } | |
3886 | #endif /* HASFPU */ | |
3887 | ||
3888 | /*-- co-processor support routines ------------------------------------------*/ | |
3889 | ||
3890 | static int | |
3891 | CoProcPresent(coproc_number) | |
3892 | unsigned int coproc_number; | |
3893 | { | |
3894 | /* Return TRUE if simulator provides a model for the given co-processor number */ | |
3895 | return(0); | |
3896 | } | |
3897 | ||
3898 | static void | |
3899 | COP_LW(coproc_num,coproc_reg,memword) | |
3900 | int coproc_num, coproc_reg; | |
3901 | unsigned int memword; | |
3902 | { | |
3903 | switch (coproc_num) { | |
3904 | #if defined(HASFPU) | |
3905 | case 1: | |
3906 | #ifdef DEBUG | |
53b9417e | 3907 | printf("DBG: COP_LW: memword = 0x%08X (uword64)memword = 0x%s\n",memword,pr_addr(memword)); |
8bae0a0c | 3908 | #endif |
da0bce9c ILT |
3909 | StoreFPR(coproc_reg,fmt_word,(uword64)memword); |
3910 | fpr_state[coproc_reg] = fmt_uninterpreted; | |
8bae0a0c JSC |
3911 | break; |
3912 | #endif /* HASFPU */ | |
3913 | ||
3914 | default: | |
f24b7b69 | 3915 | #if 0 /* this should be controlled by a configuration option */ |
53b9417e | 3916 | callback->printf_filtered(callback,"COP_LW(%d,%d,0x%08X) at IPC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,memword,pr_addr(IPC)); |
f24b7b69 | 3917 | #endif |
8bae0a0c JSC |
3918 | break; |
3919 | } | |
3920 | ||
3921 | return; | |
3922 | } | |
3923 | ||
3924 | static void | |
3925 | COP_LD(coproc_num,coproc_reg,memword) | |
3926 | int coproc_num, coproc_reg; | |
e871dd18 | 3927 | uword64 memword; |
8bae0a0c JSC |
3928 | { |
3929 | switch (coproc_num) { | |
3930 | #if defined(HASFPU) | |
3931 | case 1: | |
3932 | StoreFPR(coproc_reg,fmt_uninterpreted,memword); | |
3933 | break; | |
3934 | #endif /* HASFPU */ | |
3935 | ||
3936 | default: | |
f24b7b69 | 3937 | #if 0 /* this message should be controlled by a configuration option */ |
53b9417e | 3938 | callback->printf_filtered(callback,"COP_LD(%d,%d,0x%s) at IPC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(memword),pr_addr(IPC)); |
f24b7b69 | 3939 | #endif |
8bae0a0c JSC |
3940 | break; |
3941 | } | |
3942 | ||
3943 | return; | |
3944 | } | |
3945 | ||
3946 | static unsigned int | |
3947 | COP_SW(coproc_num,coproc_reg) | |
3948 | int coproc_num, coproc_reg; | |
3949 | { | |
3950 | unsigned int value = 0; | |
da0bce9c ILT |
3951 | FP_formats hold; |
3952 | ||
8bae0a0c JSC |
3953 | switch (coproc_num) { |
3954 | #if defined(HASFPU) | |
3955 | case 1: | |
3956 | #if 1 | |
da0bce9c ILT |
3957 | hold = fpr_state[coproc_reg]; |
3958 | fpr_state[coproc_reg] = fmt_word; | |
8bae0a0c | 3959 | value = (unsigned int)ValueFPR(coproc_reg,fmt_uninterpreted); |
da0bce9c | 3960 | fpr_state[coproc_reg] = hold; |
8bae0a0c JSC |
3961 | #else |
3962 | #if 1 | |
3963 | value = (unsigned int)ValueFPR(coproc_reg,fpr_state[coproc_reg]); | |
3964 | #else | |
3965 | #ifdef DEBUG | |
3966 | printf("DBG: COP_SW: reg in format %s (will be accessing as single)\n",DOFMT(fpr_state[coproc_reg])); | |
3967 | #endif /* DEBUG */ | |
3968 | value = (unsigned int)ValueFPR(coproc_reg,fmt_single); | |
3969 | #endif | |
3970 | #endif | |
3971 | break; | |
3972 | #endif /* HASFPU */ | |
3973 | ||
3974 | default: | |
f24b7b69 | 3975 | #if 0 /* should be controlled by configuration option */ |
53b9417e | 3976 | callback->printf_filtered(callback,"COP_SW(%d,%d) at IPC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(IPC)); |
f24b7b69 | 3977 | #endif |
8bae0a0c JSC |
3978 | break; |
3979 | } | |
3980 | ||
3981 | return(value); | |
3982 | } | |
3983 | ||
e871dd18 | 3984 | static uword64 |
8bae0a0c JSC |
3985 | COP_SD(coproc_num,coproc_reg) |
3986 | int coproc_num, coproc_reg; | |
3987 | { | |
e871dd18 | 3988 | uword64 value = 0; |
8bae0a0c JSC |
3989 | switch (coproc_num) { |
3990 | #if defined(HASFPU) | |
3991 | case 1: | |
3992 | #if 1 | |
3993 | value = ValueFPR(coproc_reg,fmt_uninterpreted); | |
3994 | #else | |
3995 | #if 1 | |
3996 | value = ValueFPR(coproc_reg,fpr_state[coproc_reg]); | |
3997 | #else | |
3998 | #ifdef DEBUG | |
3999 | printf("DBG: COP_SD: reg in format %s (will be accessing as double)\n",DOFMT(fpr_state[coproc_reg])); | |
4000 | #endif /* DEBUG */ | |
4001 | value = ValueFPR(coproc_reg,fmt_double); | |
4002 | #endif | |
4003 | #endif | |
4004 | break; | |
4005 | #endif /* HASFPU */ | |
4006 | ||
4007 | default: | |
f24b7b69 | 4008 | #if 0 /* should be controlled by configuration option */ |
53b9417e | 4009 | callback->printf_filtered(callback,"COP_SD(%d,%d) at IPC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(IPC)); |
f24b7b69 | 4010 | #endif |
8bae0a0c JSC |
4011 | break; |
4012 | } | |
4013 | ||
4014 | return(value); | |
4015 | } | |
4016 | ||
4017 | static void | |
4018 | decode_coproc(instruction) | |
4019 | unsigned int instruction; | |
4020 | { | |
4021 | int coprocnum = ((instruction >> 26) & 3); | |
4022 | ||
4023 | switch (coprocnum) { | |
4024 | case 0: /* standard CPU control and cache registers */ | |
4025 | { | |
4026 | /* NOTEs: | |
4027 | Standard CP0 registers | |
4028 | 0 = Index R4000 VR4100 VR4300 | |
4029 | 1 = Random R4000 VR4100 VR4300 | |
4030 | 2 = EntryLo0 R4000 VR4100 VR4300 | |
4031 | 3 = EntryLo1 R4000 VR4100 VR4300 | |
4032 | 4 = Context R4000 VR4100 VR4300 | |
4033 | 5 = PageMask R4000 VR4100 VR4300 | |
4034 | 6 = Wired R4000 VR4100 VR4300 | |
4035 | 8 = BadVAddr R4000 VR4100 VR4300 | |
4036 | 9 = Count R4000 VR4100 VR4300 | |
4037 | 10 = EntryHi R4000 VR4100 VR4300 | |
4038 | 11 = Compare R4000 VR4100 VR4300 | |
4039 | 12 = SR R4000 VR4100 VR4300 | |
4040 | 13 = Cause R4000 VR4100 VR4300 | |
4041 | 14 = EPC R4000 VR4100 VR4300 | |
4042 | 15 = PRId R4000 VR4100 VR4300 | |
4043 | 16 = Config R4000 VR4100 VR4300 | |
4044 | 17 = LLAddr R4000 VR4100 VR4300 | |
4045 | 18 = WatchLo R4000 VR4100 VR4300 | |
4046 | 19 = WatchHi R4000 VR4100 VR4300 | |
4047 | 20 = XContext R4000 VR4100 VR4300 | |
4048 | 26 = PErr or ECC R4000 VR4100 VR4300 | |
4049 | 27 = CacheErr R4000 VR4100 | |
4050 | 28 = TagLo R4000 VR4100 VR4300 | |
4051 | 29 = TagHi R4000 VR4100 VR4300 | |
4052 | 30 = ErrorEPC R4000 VR4100 VR4300 | |
4053 | */ | |
4054 | int code = ((instruction >> 21) & 0x1F); | |
4055 | /* R4000 Users Manual (second edition) lists the following CP0 | |
4056 | instructions: | |
4057 | DMFC0 Doubleword Move From CP0 (VR4100 = 01000000001tttttddddd00000000000) | |
4058 | DMTC0 Doubleword Move To CP0 (VR4100 = 01000000101tttttddddd00000000000) | |
4059 | MFC0 word Move From CP0 (VR4100 = 01000000000tttttddddd00000000000) | |
4060 | MTC0 word Move To CP0 (VR4100 = 01000000100tttttddddd00000000000) | |
4061 | TLBR Read Indexed TLB Entry (VR4100 = 01000010000000000000000000000001) | |
4062 | TLBWI Write Indexed TLB Entry (VR4100 = 01000010000000000000000000000010) | |
4063 | TLBWR Write Random TLB Entry (VR4100 = 01000010000000000000000000000110) | |
4064 | TLBP Probe TLB for Matching Entry (VR4100 = 01000010000000000000000000001000) | |
4065 | CACHE Cache operation (VR4100 = 101111bbbbbpppppiiiiiiiiiiiiiiii) | |
4066 | ERET Exception return (VR4100 = 01000010000000000000000000011000) | |
4067 | */ | |
4068 | if (((code == 0x00) || (code == 0x04)) && ((instruction & 0x7FF) == 0)) { | |
4069 | int rt = ((instruction >> 16) & 0x1F); | |
50a2a691 | 4070 | #if 0 |
8bae0a0c | 4071 | int rd = ((instruction >> 11) & 0x1F); |
50a2a691 | 4072 | #endif |
8bae0a0c | 4073 | if (code == 0x00) { /* MF : move from */ |
f24b7b69 | 4074 | #if 0 /* message should be controlled by configuration option */ |
8bae0a0c | 4075 | callback->printf_filtered(callback,"Warning: MFC0 %d,%d not handled yet (architecture specific)\n",rt,rd); |
f24b7b69 | 4076 | #endif |
8bae0a0c JSC |
4077 | GPR[rt] = 0xDEADC0DE; /* CPR[0,rd] */ |
4078 | } else { /* MT : move to */ | |
4079 | /* CPR[0,rd] = GPR[rt]; */ | |
f24b7b69 | 4080 | #if 0 /* should be controlled by configuration option */ |
8bae0a0c | 4081 | callback->printf_filtered(callback,"Warning: MTC0 %d,%d not handled yet (architecture specific)\n",rt,rd); |
f24b7b69 | 4082 | #endif |
8bae0a0c JSC |
4083 | } |
4084 | } else | |
53b9417e | 4085 | sim_warning("Unrecognised COP0 instruction 0x%08X at IPC = 0x%s : No handler present",instruction,pr_addr(IPC)); |
e871dd18 | 4086 | /* TODO: When executing an ERET or RFE instruction we should |
8bae0a0c JSC |
4087 | clear LLBIT, to ensure that any out-standing atomic |
4088 | read/modify/write sequence fails. */ | |
4089 | } | |
4090 | break; | |
4091 | ||
4092 | case 2: /* undefined co-processor */ | |
53b9417e | 4093 | sim_warning("COP2 instruction 0x%08X at IPC = 0x%s : No handler present",instruction,pr_addr(IPC)); |
8bae0a0c JSC |
4094 | break; |
4095 | ||
4096 | case 1: /* should not occur (FPU co-processor) */ | |
4097 | case 3: /* should not occur (FPU co-processor) */ | |
4098 | SignalException(ReservedInstruction,instruction); | |
4099 | break; | |
4100 | } | |
4101 | ||
4102 | return; | |
4103 | } | |
4104 | ||
4105 | /*-- instruction simulation -------------------------------------------------*/ | |
4106 | ||
2e61a3ad AC |
4107 | void |
4108 | sim_engine_run (sd, next_cpu_nr, siggnal) | |
4109 | SIM_DESC sd; | |
4110 | int next_cpu_nr; /* ignore */ | |
4111 | int siggnal; /* ignore */ | |
8bae0a0c | 4112 | { |
50a2a691 | 4113 | #if !defined(FASTSIM) |
8bae0a0c | 4114 | unsigned int pipeline_count = 1; |
50a2a691 | 4115 | #endif |
8bae0a0c JSC |
4116 | |
4117 | #ifdef DEBUG | |
50a2a691 | 4118 | if (STATE_MEMORY (sd) == NULL) { |
8bae0a0c JSC |
4119 | printf("DBG: simulate() entered with no memory\n"); |
4120 | exit(1); | |
4121 | } | |
4122 | #endif /* DEBUG */ | |
4123 | ||
4124 | #if 0 /* Disabled to check that everything works OK */ | |
4125 | /* The VR4300 seems to sign-extend the PC on its first | |
4126 | access. However, this may just be because it is currently | |
4127 | configured in 32bit mode. However... */ | |
4128 | PC = SIGNEXTEND(PC,32); | |
4129 | #endif | |
4130 | ||
4131 | /* main controlling loop */ | |
2e61a3ad | 4132 | while (1) { |
8bae0a0c | 4133 | /* Fetch the next instruction from the simulator memory: */ |
e871dd18 JSC |
4134 | uword64 vaddr = (uword64)PC; |
4135 | uword64 paddr; | |
8bae0a0c | 4136 | int cca; |
53b9417e | 4137 | unsigned int instruction; /* uword64? what's this used for? FIXME! */ |
8bae0a0c JSC |
4138 | int dsstate = (state & simDELAYSLOT); |
4139 | ||
4140 | #ifdef DEBUG | |
4141 | { | |
4142 | printf("DBG: state = 0x%08X :",state); | |
4143 | if (state & simSTOP) printf(" simSTOP"); | |
4144 | if (state & simSTEP) printf(" simSTEP"); | |
4145 | if (state & simHALTEX) printf(" simHALTEX"); | |
4146 | if (state & simHALTIN) printf(" simHALTIN"); | |
4147 | if (state & simBE) printf(" simBE"); | |
53b9417e | 4148 | printf("\n"); |
8bae0a0c JSC |
4149 | } |
4150 | #endif /* DEBUG */ | |
4151 | ||
4152 | #ifdef DEBUG | |
4153 | if (dsstate) | |
53b9417e | 4154 | callback->printf_filtered(callback,"DBG: DSPC = 0x%s\n",pr_addr(DSPC)); |
8bae0a0c JSC |
4155 | #endif /* DEBUG */ |
4156 | ||
6429b296 JW |
4157 | if (AddressTranslation(PC,isINSTRUCTION,isLOAD,&paddr,&cca,isTARGET,isREAL)) { |
4158 | if ((vaddr & 1) == 0) { | |
4159 | /* Copy the action of the LW instruction */ | |
4160 | unsigned int reverse = (ReverseEndian ? (LOADDRMASK >> 2) : 0); | |
4161 | unsigned int bigend = (BigEndianCPU ? (LOADDRMASK >> 2) : 0); | |
4162 | uword64 value; | |
4163 | unsigned int byte; | |
4164 | paddr = ((paddr & ~LOADDRMASK) | ((paddr & LOADDRMASK) ^ (reverse << 2))); | |
53b9417e | 4165 | LoadMemory(&value,NULL,cca,AccessLength_WORD,paddr,vaddr,isINSTRUCTION,isREAL); |
6429b296 JW |
4166 | byte = ((vaddr & LOADDRMASK) ^ (bigend << 2)); |
4167 | instruction = ((value >> (8 * byte)) & 0xFFFFFFFF); | |
4168 | } else { | |
4169 | /* Copy the action of the LH instruction */ | |
4170 | unsigned int reverse = (ReverseEndian ? (LOADDRMASK >> 1) : 0); | |
4171 | unsigned int bigend = (BigEndianCPU ? (LOADDRMASK >> 1) : 0); | |
4172 | uword64 value; | |
4173 | unsigned int byte; | |
4174 | paddr = (((paddr & ~ (uword64) 1) & ~LOADDRMASK) | |
4175 | | (((paddr & ~ (uword64) 1) & LOADDRMASK) ^ (reverse << 1))); | |
53b9417e | 4176 | LoadMemory(&value,NULL,cca, AccessLength_HALFWORD, |
6429b296 JW |
4177 | paddr & ~ (uword64) 1, |
4178 | vaddr, isINSTRUCTION, isREAL); | |
4179 | byte = (((vaddr &~ (uword64) 1) & LOADDRMASK) ^ (bigend << 1)); | |
4180 | instruction = ((value >> (8 * byte)) & 0xFFFF); | |
4181 | } | |
8bae0a0c | 4182 | } else { |
53b9417e | 4183 | fprintf(stderr,"Cannot translate address for PC = 0x%s failed\n",pr_addr(PC)); |
8bae0a0c JSC |
4184 | exit(1); |
4185 | } | |
4186 | ||
4187 | #ifdef DEBUG | |
53b9417e | 4188 | callback->printf_filtered(callback,"DBG: fetched 0x%08X from PC = 0x%s\n",instruction,pr_addr(PC)); |
8bae0a0c JSC |
4189 | #endif /* DEBUG */ |
4190 | ||
4191 | #if !defined(FASTSIM) || defined(PROFILE) | |
4192 | instruction_fetches++; | |
a9f7253f JSC |
4193 | /* Since we increment above, the value should only ever be zero if |
4194 | we have just overflowed: */ | |
4195 | if (instruction_fetches == 0) | |
4196 | instruction_fetch_overflow++; | |
8bae0a0c JSC |
4197 | #if defined(PROFILE) |
4198 | if ((state & simPROFILE) && ((instruction_fetches % profile_frequency) == 0) && profile_hist) { | |
e3d12c65 | 4199 | unsigned n = ((unsigned int)(PC - profile_minpc) >> (profile_shift + 2)); |
8bae0a0c JSC |
4200 | if (n < profile_nsamples) { |
4201 | /* NOTE: The counts for the profiling bins are only 16bits wide */ | |
4202 | if (profile_hist[n] != USHRT_MAX) | |
4203 | (profile_hist[n])++; | |
4204 | } | |
4205 | } | |
4206 | #endif /* PROFILE */ | |
4207 | #endif /* !FASTSIM && PROFILE */ | |
4208 | ||
4209 | IPC = PC; /* copy PC for this instruction */ | |
4210 | /* This is required by exception processing, to ensure that we can | |
4211 | cope with exceptions in the delay slots of branches that may | |
4212 | already have changed the PC. */ | |
6429b296 JW |
4213 | if ((vaddr & 1) == 0) |
4214 | PC += 4; /* increment ready for the next fetch */ | |
4215 | else | |
4216 | PC += 2; | |
8bae0a0c JSC |
4217 | /* NOTE: If we perform a delay slot change to the PC, this |
4218 | increment is not requuired. However, it would make the | |
4219 | simulator more complicated to try and avoid this small hit. */ | |
4220 | ||
4221 | /* Currently this code provides a simple model. For more | |
4222 | complicated models we could perform exception status checks at | |
4223 | this point, and set the simSTOP state as required. This could | |
4224 | also include processing any hardware interrupts raised by any | |
4225 | I/O model attached to the simulator context. | |
4226 | ||
4227 | Support for "asynchronous" I/O events within the simulated world | |
4228 | could be providing by managing a counter, and calling a I/O | |
4229 | specific handler when a particular threshold is reached. On most | |
4230 | architectures a decrement and check for zero operation is | |
4231 | usually quicker than an increment and compare. However, the | |
4232 | process of managing a known value decrement to zero, is higher | |
4233 | than the cost of using an explicit value UINT_MAX into the | |
4234 | future. Which system is used will depend on how complicated the | |
4235 | I/O model is, and how much it is likely to affect the simulator | |
4236 | bandwidth. | |
4237 | ||
4238 | If events need to be scheduled further in the future than | |
4239 | UINT_MAX event ticks, then the I/O model should just provide its | |
4240 | own counter, triggered from the event system. */ | |
4241 | ||
4242 | /* MIPS pipeline ticks. To allow for future support where the | |
4243 | pipeline hit of individual instructions is known, this control | |
4244 | loop manages a "pipeline_count" variable. It is initialised to | |
4245 | 1 (one), and will only be changed by the simulator engine when | |
4246 | executing an instruction. If the engine does not have access to | |
4247 | pipeline cycle count information then all instructions will be | |
4248 | treated as using a single cycle. NOTE: A standard system is not | |
4249 | provided by the default simulator because different MIPS | |
4250 | architectures have different cycle counts for the same | |
50a2a691 AC |
4251 | instructions. |
4252 | ||
4253 | [NOTE: pipeline_count has been replaced the event queue] */ | |
8bae0a0c JSC |
4254 | |
4255 | #if defined(HASFPU) | |
4256 | /* Set previous flag, depending on current: */ | |
4257 | if (state & simPCOC0) | |
4258 | state |= simPCOC1; | |
4259 | else | |
4260 | state &= ~simPCOC1; | |
4261 | /* and update the current value: */ | |
4262 | if (GETFCC(0)) | |
4263 | state |= simPCOC0; | |
4264 | else | |
4265 | state &= ~simPCOC0; | |
4266 | #endif /* HASFPU */ | |
4267 | ||
4268 | /* NOTE: For multi-context simulation environments the "instruction" | |
4269 | variable should be local to this routine. */ | |
4270 | ||
4271 | /* Shorthand accesses for engine. Note: If we wanted to use global | |
4272 | variables (and a single-threaded simulator engine), then we can | |
4273 | create the actual variables with these names. */ | |
4274 | ||
4275 | if (!(state & simSKIPNEXT)) { | |
4276 | /* Include the simulator engine */ | |
4277 | #include "engine.c" | |
f24b7b69 | 4278 | #if ((GPRLEN == 64) && !PROCESSOR_64BIT) || ((GPRLEN == 32) && PROCESSOR_64BIT) |
8bae0a0c JSC |
4279 | #error "Mismatch between run-time simulator code and simulation engine" |
4280 | #endif | |
4281 | ||
4282 | #if defined(WARN_LOHI) | |
4283 | /* Decrement the HI/LO validity ticks */ | |
4284 | if (HIACCESS > 0) | |
4285 | HIACCESS--; | |
4286 | if (LOACCESS > 0) | |
4287 | LOACCESS--; | |
53b9417e DE |
4288 | if (HI1ACCESS > 0) |
4289 | HI1ACCESS--; | |
4290 | if (LO1ACCESS > 0) | |
4291 | LO1ACCESS--; | |
8bae0a0c JSC |
4292 | #endif /* WARN_LOHI */ |
4293 | ||
4294 | #if defined(WARN_ZERO) | |
4295 | /* For certain MIPS architectures, GPR[0] is hardwired to zero. We | |
4296 | should check for it being changed. It is better doing it here, | |
4297 | than within the simulator, since it will help keep the simulator | |
4298 | small. */ | |
4299 | if (ZERO != 0) { | |
53b9417e | 4300 | sim_warning("The ZERO register has been updated with 0x%s (PC = 0x%s) (reset back to zero)",pr_addr(ZERO),pr_addr(IPC)); |
8bae0a0c JSC |
4301 | ZERO = 0; /* reset back to zero before next instruction */ |
4302 | } | |
4303 | #endif /* WARN_ZERO */ | |
4304 | } else /* simSKIPNEXT check */ | |
4305 | state &= ~simSKIPNEXT; | |
4306 | ||
4307 | /* If the delay slot was active before the instruction is | |
4308 | executed, then update the PC to its new value: */ | |
4309 | if (dsstate) { | |
4310 | #ifdef DEBUG | |
53b9417e | 4311 | printf("DBG: dsstate set before instruction execution - updating PC to 0x%s\n",pr_addr(DSPC)); |
8bae0a0c JSC |
4312 | #endif /* DEBUG */ |
4313 | PC = DSPC; | |
aaff8437 | 4314 | state &= ~(simDELAYSLOT | simJALDELAYSLOT); |
8bae0a0c JSC |
4315 | } |
4316 | ||
4317 | if (MIPSISA < 4) { /* The following is only required on pre MIPS IV processors: */ | |
4318 | /* Deal with pending register updates: */ | |
4319 | #ifdef DEBUG | |
4320 | printf("DBG: EMPTY BEFORE pending_in = %d, pending_out = %d, pending_total = %d\n",pending_in,pending_out,pending_total); | |
4321 | #endif /* DEBUG */ | |
4322 | if (pending_out != pending_in) { | |
4323 | int loop; | |
4324 | int index = pending_out; | |
4325 | int total = pending_total; | |
4326 | if (pending_total == 0) { | |
4327 | fprintf(stderr,"FATAL: Mis-match on pending update pointers\n"); | |
4328 | exit(1); | |
4329 | } | |
4330 | for (loop = 0; (loop < total); loop++) { | |
4331 | #ifdef DEBUG | |
4332 | printf("DBG: BEFORE index = %d, loop = %d\n",index,loop); | |
4333 | #endif /* DEBUG */ | |
4334 | if (pending_slot_reg[index] != (LAST_EMBED_REGNUM + 1)) { | |
4335 | #ifdef DEBUG | |
4336 | printf("pending_slot_count[%d] = %d\n",index,pending_slot_count[index]); | |
4337 | #endif /* DEBUG */ | |
4338 | if (--(pending_slot_count[index]) == 0) { | |
4339 | #ifdef DEBUG | |
4340 | printf("pending_slot_reg[%d] = %d\n",index,pending_slot_reg[index]); | |
53b9417e | 4341 | printf("pending_slot_value[%d] = 0x%s\n",index,pr_addr(pending_slot_value[index])); |
8bae0a0c JSC |
4342 | #endif /* DEBUG */ |
4343 | if (pending_slot_reg[index] == COCIDX) { | |
4344 | SETFCC(0,((FCR31 & (1 << 23)) ? 1 : 0)); | |
4345 | } else { | |
4346 | registers[pending_slot_reg[index]] = pending_slot_value[index]; | |
4347 | #if defined(HASFPU) | |
4348 | /* The only time we have PENDING updates to FPU | |
4349 | registers, is when performing binary transfers. This | |
4350 | means we should update the register type field. */ | |
4351 | if ((pending_slot_reg[index] >= FGRIDX) && (pending_slot_reg[index] < (FGRIDX + 32))) | |
7e6c297e | 4352 | fpr_state[pending_slot_reg[index] - FGRIDX] = fmt_uninterpreted; |
8bae0a0c JSC |
4353 | #endif /* HASFPU */ |
4354 | } | |
4355 | #ifdef DEBUG | |
53b9417e | 4356 | printf("registers[%d] = 0x%s\n",pending_slot_reg[index],pr_addr(registers[pending_slot_reg[index]])); |
8bae0a0c JSC |
4357 | #endif /* DEBUG */ |
4358 | pending_slot_reg[index] = (LAST_EMBED_REGNUM + 1); | |
4359 | pending_out++; | |
4360 | if (pending_out == PSLOTS) | |
4361 | pending_out = 0; | |
4362 | pending_total--; | |
4363 | } | |
4364 | } | |
4365 | #ifdef DEBUG | |
4366 | printf("DBG: AFTER index = %d, loop = %d\n",index,loop); | |
4367 | #endif /* DEBUG */ | |
4368 | index++; | |
4369 | if (index == PSLOTS) | |
4370 | index = 0; | |
4371 | } | |
4372 | } | |
4373 | #ifdef DEBUG | |
4374 | printf("DBG: EMPTY AFTER pending_in = %d, pending_out = %d, pending_total = %d\n",pending_in,pending_out,pending_total); | |
4375 | #endif /* DEBUG */ | |
4376 | } | |
4377 | ||
4378 | #if !defined(FASTSIM) | |
50a2a691 AC |
4379 | if (sim_events_tickn (sd, pipeline_count)) |
4380 | { | |
4381 | /* cpu->cia = cia; */ | |
4382 | sim_events_process (sd); | |
4383 | } | |
4384 | #else | |
2e61a3ad AC |
4385 | if (sim_events_tick (sd)) |
4386 | { | |
4387 | /* cpu->cia = cia; */ | |
4388 | sim_events_process (sd); | |
4389 | } | |
50a2a691 | 4390 | #endif /* FASTSIM */ |
8bae0a0c | 4391 | } |
8bae0a0c JSC |
4392 | } |
4393 | ||
53b9417e DE |
4394 | /* This code copied from gdb's utils.c. Would like to share this code, |
4395 | but don't know of a common place where both could get to it. */ | |
4396 | ||
4397 | /* Temporary storage using circular buffer */ | |
4398 | #define NUMCELLS 16 | |
4399 | #define CELLSIZE 32 | |
4400 | static char* | |
4401 | get_cell() | |
4402 | { | |
4403 | static char buf[NUMCELLS][CELLSIZE]; | |
4404 | static int cell=0; | |
4405 | if (++cell>=NUMCELLS) cell=0; | |
4406 | return buf[cell]; | |
4407 | } | |
4408 | ||
4409 | /* Print routines to handle variable size regs, etc */ | |
4410 | ||
4411 | /* Eliminate warning from compiler on 32-bit systems */ | |
4412 | static int thirty_two = 32; | |
4413 | ||
4414 | char* | |
4415 | pr_addr(addr) | |
4416 | SIM_ADDR addr; | |
4417 | { | |
4418 | char *paddr_str=get_cell(); | |
4419 | switch (sizeof(addr)) | |
4420 | { | |
4421 | case 8: | |
50a2a691 | 4422 | sprintf(paddr_str,"%08lx%08lx", |
53b9417e DE |
4423 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); |
4424 | break; | |
4425 | case 4: | |
50a2a691 | 4426 | sprintf(paddr_str,"%08lx",(unsigned long)addr); |
53b9417e DE |
4427 | break; |
4428 | case 2: | |
4429 | sprintf(paddr_str,"%04x",(unsigned short)(addr&0xffff)); | |
4430 | break; | |
4431 | default: | |
4432 | sprintf(paddr_str,"%x",addr); | |
4433 | } | |
4434 | return paddr_str; | |
4435 | } | |
4436 | ||
87e43259 AC |
4437 | char* |
4438 | pr_uword64(addr) | |
4439 | uword64 addr; | |
4440 | { | |
4441 | char *paddr_str=get_cell(); | |
50a2a691 | 4442 | sprintf(paddr_str,"%08lx%08lx", |
87e43259 AC |
4443 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); |
4444 | return paddr_str; | |
4445 | } | |
4446 | ||
4447 | ||
8bae0a0c JSC |
4448 | /*---------------------------------------------------------------------------*/ |
4449 | /*> EOF interp.c <*/ |