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c906108c SS |
1 | /* Target-specific definition for the Mitsubishi D30V |
2 | Copyright (C) 1997 Free Software Foundation, Inc. | |
3 | ||
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b JM |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | #ifndef TM_D30V_H | |
22 | #define TM_D30V_H | |
23 | ||
24 | /* Define the bit, byte, and word ordering of the machine. */ | |
25 | ||
26 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
27 | ||
28 | /* Offset from address of function to start of its code. | |
29 | Zero on most machines. */ | |
30 | ||
31 | #define FUNCTION_START_OFFSET 0 | |
32 | ||
33 | /* these are the addresses the D30V-EVA board maps data */ | |
34 | /* and instruction memory to. */ | |
35 | ||
36 | #define DMEM_START 0x20000000 | |
c5aa993b | 37 | #define IMEM_START 0x00000000 /* was 0x10000000 */ |
c906108c SS |
38 | #define STACK_START 0x20007ffe |
39 | ||
104c1213 | 40 | /* Forward decls for prototypes */ |
c906108c | 41 | struct frame_info; |
c5aa993b | 42 | struct frame_saved_regs; |
c906108c SS |
43 | struct type; |
44 | struct value; | |
c906108c SS |
45 | |
46 | /* Advance PC across any function entry prologue instructions | |
47 | to reach some "real" code. */ | |
48 | ||
a14ed312 | 49 | extern CORE_ADDR d30v_skip_prologue (CORE_ADDR); |
b83266a0 | 50 | #define SKIP_PROLOGUE(ip) (d30v_skip_prologue (ip)) |
c906108c SS |
51 | |
52 | ||
53 | /* Stack grows downward. */ | |
54 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
55 | ||
56 | /* for a breakpoint, use "dbt || nop" */ | |
57 | #define BREAKPOINT {0x00, 0xb0, 0x00, 0x00,\ | |
58 | 0x00, 0xf0, 0x00, 0x00} | |
59 | ||
60 | /* If your kernel resets the pc after the trap happens you may need to | |
61 | define this before including this file. */ | |
62 | #define DECR_PC_AFTER_BREAK 0 | |
63 | ||
64 | #define REGISTER_NAMES \ | |
65 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
66 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ | |
67 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ | |
68 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \ | |
69 | "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", \ | |
70 | "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", \ | |
71 | "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", \ | |
72 | "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63", \ | |
73 | "spi", "spu", \ | |
74 | "psw", "bpsw", "pc", "bpc", "dpsw", "dpc", "cr6", "rpt_c", \ | |
75 | "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "eit_vb",\ | |
76 | "int_s", "int_m", "a0", "a1" \ | |
77 | } | |
78 | ||
79 | #define NUM_REGS 86 | |
80 | ||
81 | /* Register numbers of various important registers. | |
82 | Note that some of these values are "real" register numbers, | |
83 | and correspond to the general registers of the machine, | |
84 | and some are "phony" register numbers which are too large | |
85 | to be actual register numbers as far as the user is concerned | |
86 | but do serve to get the desired values when passed to read_register. */ | |
87 | ||
88 | #define R0_REGNUM 0 | |
89 | #define FP_REGNUM 61 | |
90 | #define LR_REGNUM 62 | |
91 | #define SP_REGNUM 63 | |
92 | #define SPI_REGNUM 64 /* Interrupt stack pointer */ | |
93 | #define SPU_REGNUM 65 /* User stack pointer */ | |
94 | #define CREGS_START 66 | |
95 | ||
c5aa993b | 96 | #define PSW_REGNUM (CREGS_START + 0) /* psw, bpsw, or dpsw??? */ |
c906108c | 97 | #define PSW_SM (((unsigned long)0x80000000) >> 0) /* Stack mode: 0/SPI */ |
c5aa993b | 98 | /* 1/SPU */ |
c906108c SS |
99 | #define PSW_EA (((unsigned long)0x80000000) >> 2) /* Execution status */ |
100 | #define PSW_DB (((unsigned long)0x80000000) >> 3) /* Debug mode */ | |
101 | #define PSW_DS (((unsigned long)0x80000000) >> 4) /* Debug EIT status */ | |
102 | #define PSW_IE (((unsigned long)0x80000000) >> 5) /* Interrupt enable */ | |
103 | #define PSW_RP (((unsigned long)0x80000000) >> 6) /* Repeat enable */ | |
104 | #define PSW_MD (((unsigned long)0x80000000) >> 7) /* Modulo enable */ | |
105 | #define PSW_F0 (((unsigned long)0x80000000) >> 17) /* F0 flag */ | |
106 | #define PSW_F1 (((unsigned long)0x80000000) >> 19) /* F1 flag */ | |
107 | #define PSW_F2 (((unsigned long)0x80000000) >> 21) /* F2 flag */ | |
108 | #define PSW_F3 (((unsigned long)0x80000000) >> 23) /* F3 flag */ | |
109 | #define PSW_S (((unsigned long)0x80000000) >> 25) /* Saturation flag */ | |
110 | #define PSW_V (((unsigned long)0x80000000) >> 27) /* Overflow flag */ | |
111 | #define PSW_VA (((unsigned long)0x80000000) >> 29) /* Accum. overflow */ | |
112 | #define PSW_C (((unsigned long)0x80000000) >> 31) /* Carry/Borrow flag */ | |
113 | ||
c5aa993b JM |
114 | #define BPSW_REGNUM (CREGS_START + 1) /* Backup PSW (on interrupt) */ |
115 | #define PC_REGNUM (CREGS_START + 2) /* pc, bpc, or dpc??? */ | |
116 | #define BPC_REGNUM (CREGS_START + 3) /* Backup PC (on interrupt) */ | |
117 | #define DPSW_REGNUM (CREGS_START + 4) /* Backup PSW (on debug trap) */ | |
118 | #define DPC_REGNUM (CREGS_START + 5) /* Backup PC (on debug trap) */ | |
119 | #define RPT_C_REGNUM (CREGS_START + 7) /* Loop count */ | |
120 | #define RPT_S_REGNUM (CREGS_START + 8) /* Loop start address */ | |
121 | #define RPT_E_REGNUM (CREGS_START + 9) /* Loop end address */ | |
c906108c SS |
122 | #define MOD_S_REGNUM (CREGS_START + 10) |
123 | #define MOD_E_REGNUM (CREGS_START + 11) | |
c5aa993b JM |
124 | #define IBA_REGNUM (CREGS_START + 14) /* Instruction break address */ |
125 | #define EIT_VB_REGNUM (CREGS_START + 15) /* Vector base address */ | |
126 | #define INT_S_REGNUM (CREGS_START + 16) /* Interrupt status */ | |
127 | #define INT_M_REGNUM (CREGS_START + 17) /* Interrupt mask */ | |
c906108c SS |
128 | #define A0_REGNUM 84 |
129 | #define A1_REGNUM 85 | |
130 | ||
131 | /* Say how much memory is needed to store a copy of the register set */ | |
c5aa993b | 132 | #define REGISTER_BYTES ((NUM_REGS - 2) * 4 + 2 * 8) |
c906108c SS |
133 | |
134 | /* Index within `registers' of the first byte of the space for | |
135 | register N. */ | |
136 | ||
137 | #define REGISTER_BYTE(N) \ | |
138 | ( ((N) >= A0_REGNUM) ? ( ((N) - A0_REGNUM) * 8 + A0_REGNUM * 4 ) : ((N) * 4) ) | |
139 | ||
140 | /* Number of bytes of storage in the actual machine representation | |
141 | for register N. */ | |
142 | ||
143 | #define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 4 ) | |
144 | ||
145 | /* Number of bytes of storage in the program's representation | |
c5aa993b | 146 | for register N. */ |
c906108c SS |
147 | #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N) |
148 | ||
149 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
150 | ||
151 | #define MAX_REGISTER_RAW_SIZE 8 | |
152 | ||
153 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
154 | ||
155 | #define MAX_REGISTER_VIRTUAL_SIZE 8 | |
156 | ||
157 | /* Return the GDB type object for the "standard" data type | |
158 | of data in register N. */ | |
159 | ||
160 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
161 | ( ((N) < A0_REGNUM ) ? builtin_type_long : builtin_type_long_long) | |
162 | ||
163 | /* Writing to r0 is a noop (not an error or exception or anything like | |
164 | that, however). */ | |
165 | ||
166 | #define CANNOT_STORE_REGISTER(regno) ((regno) == R0_REGNUM) | |
167 | ||
a14ed312 | 168 | void d30v_do_registers_info (int regnum, int fpregs); |
c906108c SS |
169 | |
170 | #define DO_REGISTERS_INFO d30v_do_registers_info | |
171 | ||
172 | /* Store the address of the place in which to copy the structure the | |
173 | subroutine will return. This is called from call_function. | |
174 | ||
175 | We store structs through a pointer passed in R2 */ | |
176 | ||
177 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
178 | { write_register (2, (ADDR)); } | |
179 | ||
180 | ||
181 | /* Write into appropriate registers a function return value | |
182 | of type TYPE, given in virtual format. | |
183 | ||
184 | Things always get returned in R2/R3 */ | |
185 | ||
186 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
187 | write_register_bytes (REGISTER_BYTE(2), VALBUF, TYPE_LENGTH (TYPE)) | |
188 | ||
189 | ||
190 | /* Extract from an array REGBUF containing the (raw) register state | |
191 | the address in which a function should return its structure value, | |
192 | as a CORE_ADDR (or an expression that can be used as one). */ | |
193 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (((CORE_ADDR *)(REGBUF))[2]) | |
194 | \f | |
195 | ||
196 | /* Define other aspects of the stack frame. | |
197 | we keep a copy of the worked out return pc lying around, since it | |
198 | is a useful bit of info */ | |
199 | ||
200 | #define EXTRA_FRAME_INFO \ | |
201 | CORE_ADDR return_pc; \ | |
202 | CORE_ADDR dummy; \ | |
203 | int frameless; \ | |
204 | int size; | |
205 | ||
206 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ | |
c5aa993b | 207 | d30v_init_extra_frame_info(fromleaf, fi) |
c906108c | 208 | |
a14ed312 | 209 | extern void d30v_init_extra_frame_info (int fromleaf, struct frame_info *fi); |
c906108c SS |
210 | |
211 | /* A macro that tells us whether the function invocation represented | |
212 | by FI does not have a frame on the stack associated with it. If it | |
213 | does not, FRAMELESS is set to 1, else 0. */ | |
214 | ||
392a587b JM |
215 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
216 | (frameless_look_for_prologue (FI)) | |
c906108c | 217 | |
d4f3574e | 218 | CORE_ADDR d30v_frame_chain (struct frame_info *frame); |
c906108c | 219 | #define FRAME_CHAIN(FRAME) d30v_frame_chain(FRAME) |
a14ed312 | 220 | extern int d30v_frame_chain_valid (CORE_ADDR, struct frame_info *); |
c906108c | 221 | #define FRAME_CHAIN_VALID(chain, thisframe) d30v_frame_chain_valid (chain, thisframe) |
c5aa993b | 222 | #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc) |
c906108c SS |
223 | #define FRAME_ARGS_ADDRESS(fi) (fi)->frame |
224 | #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame | |
225 | ||
d4f3574e | 226 | void d30v_init_frame_pc (int fromleaf, struct frame_info *prev); |
c906108c SS |
227 | #define INIT_FRAME_PC_FIRST(fromleaf, prev) d30v_init_frame_pc(fromleaf, prev) |
228 | #define INIT_FRAME_PC(fromleaf, prev) /* nada */ | |
229 | ||
230 | /* Immediately after a function call, return the saved pc. We can't */ | |
231 | /* use frame->return_pc beause that is determined by reading R62 off the */ | |
232 | /* stack and that may not be written yet. */ | |
233 | ||
234 | #define SAVED_PC_AFTER_CALL(frame) (read_register(LR_REGNUM)) | |
c5aa993b | 235 | |
c906108c SS |
236 | /* Set VAL to the number of args passed to frame described by FI. |
237 | Can set VAL to -1, meaning no way to tell. */ | |
238 | /* We can't tell how many args there are */ | |
239 | ||
392a587b | 240 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
241 | |
242 | /* Return number of bytes at start of arglist that are not really args. */ | |
243 | ||
244 | #define FRAME_ARGS_SKIP 0 | |
245 | ||
246 | ||
247 | /* Put here the code to store, into a struct frame_saved_regs, | |
248 | the addresses of the saved registers of frame described by FRAME_INFO. | |
249 | This includes special registers such as pc and fp saved in special | |
250 | ways in the stack frame. sp is even more special: | |
251 | the address we return for it IS the sp for the next frame. */ | |
252 | ||
253 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
254 | d30v_frame_find_saved_regs(frame_info, &(frame_saved_regs)) | |
255 | ||
a14ed312 KB |
256 | extern void d30v_frame_find_saved_regs (struct frame_info *, |
257 | struct frame_saved_regs *); | |
c906108c | 258 | |
c906108c SS |
259 | /* DUMMY FRAMES. Need these to support inferior function calls. |
260 | They work like this on D30V: | |
261 | First we set a breakpoint at 0 or __start. | |
262 | Then we push all the registers onto the stack. | |
263 | Then put the function arguments in the proper registers and set r13 | |
264 | to our breakpoint address. | |
265 | Finally call the function directly. | |
266 | When it hits the breakpoint, clear the break point and pop the old | |
267 | register contents off the stack. */ | |
268 | ||
c5aa993b | 269 | #define CALL_DUMMY { 0 } |
c906108c | 270 | #define PUSH_DUMMY_FRAME |
c5aa993b | 271 | #define CALL_DUMMY_START_OFFSET 0 |
c906108c SS |
272 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT |
273 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
274 | ||
a14ed312 | 275 | extern CORE_ADDR d30v_call_dummy_address (void); |
c906108c SS |
276 | #define CALL_DUMMY_ADDRESS() d30v_call_dummy_address() |
277 | ||
278 | #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ | |
279 | sp = d30v_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p) | |
280 | ||
281 | #define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 ) | |
282 | ||
a14ed312 KB |
283 | extern CORE_ADDR d30v_fix_call_dummy (char *, CORE_ADDR, CORE_ADDR, |
284 | int, struct value **, | |
285 | struct type *, int); | |
c906108c | 286 | #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ |
392a587b | 287 | (d30v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))) |
a14ed312 KB |
288 | extern CORE_ADDR d30v_push_arguments (int, struct value **, CORE_ADDR, int, |
289 | CORE_ADDR); | |
c906108c SS |
290 | |
291 | ||
292 | /* Extract from an array REGBUF containing the (raw) register state | |
293 | a function return value of type TYPE, and copy that, in virtual format, | |
294 | into VALBUF. */ | |
295 | ||
296 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
297 | d30v_extract_return_value(TYPE, REGBUF, VALBUF) | |
a14ed312 | 298 | extern void d30v_extract_return_value (struct type *, char *, char *); |
c906108c SS |
299 | |
300 | ||
301 | /* Discard from the stack the innermost frame, | |
302 | restoring all saved registers. */ | |
303 | #define POP_FRAME d30v_pop_frame(); | |
a14ed312 | 304 | extern void d30v_pop_frame (void); |
c906108c SS |
305 | |
306 | #define REGISTER_SIZE 4 | |
307 | ||
308 | /* Need to handle SP special, as we need to select between spu and spi. */ | |
309 | #if 0 /* XXX until the simulator is fixed */ | |
310 | #define TARGET_READ_SP() ((read_register (PSW_REGNUM) & PSW_SM) \ | |
311 | ? read_register (SPU_REGNUM) \ | |
312 | : read_register (SPI_REGNUM)) | |
313 | ||
314 | #define TARGET_WRITE_SP(val) ((read_register (PSW_REGNUM) & PSW_SM) \ | |
315 | ? write_register (SPU_REGNUM, (val)) \ | |
316 | : write_register (SPI_REGNUM, (val))) | |
317 | #endif | |
318 | ||
319 | #define STACK_ALIGN(len) (((len) + 7 ) & ~7) | |
320 | ||
321 | /* Turn this on to cause remote-sim.c to use sim_set/clear_breakpoint. */ | |
322 | ||
323 | #define SIM_HAS_BREAKPOINTS | |
324 | ||
325 | #endif /* TM_D30V_H */ |