Commit | Line | Data |
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c906108c SS |
1 | /* Remote target communications for the Macraigor Systems BDM Wiggler |
2 | talking to a Motorola PPC 8xx ADS board | |
b6ba6518 KB |
3 | Copyright 1996, 1997, 1998, 1999, 2000, 2001 |
4 | Free Software Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "gdbcore.h" | |
25 | #include "gdb_string.h" | |
26 | #include <fcntl.h> | |
27 | #include "frame.h" | |
28 | #include "inferior.h" | |
29 | #include "bfd.h" | |
30 | #include "symfile.h" | |
31 | #include "target.h" | |
c906108c SS |
32 | #include "gdbcmd.h" |
33 | #include "objfiles.h" | |
34 | #include "gdb-stabs.h" | |
35 | #include <sys/types.h> | |
c906108c SS |
36 | #include "serial.h" |
37 | #include "ocd.h" | |
9aa1e687 | 38 | #include "ppc-tdep.h" |
4e052eda | 39 | #include "regcache.h" |
c906108c | 40 | |
a14ed312 | 41 | static void bdm_ppc_open (char *name, int from_tty); |
c906108c | 42 | |
39f77062 KB |
43 | static ptid_t bdm_ppc_wait (ptid_t ptid, |
44 | struct target_waitstatus *target_status); | |
c906108c | 45 | |
a14ed312 | 46 | static void bdm_ppc_fetch_registers (int regno); |
c906108c | 47 | |
a14ed312 | 48 | static void bdm_ppc_store_registers (int regno); |
c906108c SS |
49 | |
50 | extern struct target_ops bdm_ppc_ops; /* Forward decl */ | |
51 | \f | |
c5aa993b | 52 | /*#define BDM_NUM_REGS 71 */ |
c906108c SS |
53 | #define BDM_NUM_REGS 24 |
54 | ||
55 | #define BDM_REGMAP \ | |
56 | 2048, 2049, 2050, 2051, 2052, 2053, 2054, 2055, /* r0-r7 */ \ | |
57 | 2056, 2057, 2058, 2059, 2060, 2061, 2062, 2063, /* r8-r15 */ \ | |
58 | 2064, 2065, 2066, 2067, 2068, 2069, 2070, 2071, /* r16-r23 */ \ | |
59 | 2072, 2073, 2074, 2075, 2076, 2077, 2078, 2079, /* r24-r31 */ \ | |
60 | \ | |
61 | 2080, 2082, 2084, 2086, 2088, 2090, 2092, 2094, /* fp0->fp8 */ \ | |
62 | 2096, 2098, 2100, 2102, 2104, 2106, 2108, 2110, /* fp0->fp8 */ \ | |
63 | 2112, 2114, 2116, 2118, 2120, 2122, 2124, 2126, /* fp0->fp8 */ \ | |
64 | 2128, 2130, 2132, 2134, 2136, 2138, 2140, 2142, /* fp0->fp8 */ \ | |
65 | \ | |
66 | 26, /* pc (SRR0 (SPR 26)) */ \ | |
67 | 2146, /* ps (MSR) */ \ | |
68 | 2144, /* cnd (CR) */ \ | |
69 | 8, /* lr (SPR 8) */ \ | |
70 | 9, /* cnt (CTR (SPR 9)) */ \ | |
71 | 1, /* xer (SPR 1) */ \ | |
c5aa993b | 72 | 0, /* mq (SPR 0) */ |
c906108c | 73 | \f |
c5aa993b JM |
74 | |
75 | char nowatchdog[4] = | |
76 | {0xff, 0xff, 0xff, 0x88}; | |
c906108c SS |
77 | |
78 | /* Open a connection to a remote debugger. | |
79 | NAME is the filename used for communication. */ | |
80 | ||
81 | static void | |
fba45db2 | 82 | bdm_ppc_open (char *name, int from_tty) |
c906108c SS |
83 | { |
84 | CORE_ADDR watchdogaddr = 0xff000004; | |
85 | ||
86 | ocd_open (name, from_tty, OCD_TARGET_MOTO_PPC, &bdm_ppc_ops); | |
87 | ||
88 | /* We want interrupts to drop us into debugging mode. */ | |
89 | /* Modify the DER register to accomplish this. */ | |
90 | ocd_write_bdm_register (149, 0x20024000); | |
91 | ||
92 | /* Disable watchdog timer on the board */ | |
93 | ocd_write_bytes (watchdogaddr, nowatchdog, 4); | |
94 | } | |
95 | ||
96 | /* Wait until the remote machine stops, then return, | |
97 | storing status in STATUS just as `wait' would. | |
98 | Returns "pid" (though it's not clear what, if anything, that | |
99 | means in the case of this target). */ | |
100 | ||
39f77062 KB |
101 | static ptid_t |
102 | bdm_ppc_wait (ptid_t ptid, struct target_waitstatus *target_status) | |
c906108c SS |
103 | { |
104 | int stop_reason; | |
105 | ||
106 | target_status->kind = TARGET_WAITKIND_STOPPED; | |
107 | ||
108 | stop_reason = ocd_wait (); | |
109 | ||
110 | if (stop_reason) | |
111 | { | |
112 | target_status->value.sig = TARGET_SIGNAL_INT; | |
39f77062 | 113 | return inferior_ptid; |
c906108c SS |
114 | } |
115 | ||
c5aa993b | 116 | target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */ |
c906108c SS |
117 | |
118 | #if 0 | |
119 | { | |
120 | unsigned long ecr, der; | |
121 | ||
c5aa993b JM |
122 | ecr = ocd_read_bdm_register (148); /* Read the exception cause register */ |
123 | der = ocd_read_bdm_register (149); /* Read the debug enables register */ | |
c906108c SS |
124 | fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der); |
125 | } | |
126 | #endif | |
127 | ||
39f77062 | 128 | return inferior_ptid; |
c906108c SS |
129 | } |
130 | \f | |
c5aa993b JM |
131 | static int bdm_regmap[] = |
132 | {BDM_REGMAP}; | |
c906108c SS |
133 | |
134 | /* Read the remote registers into regs. | |
135 | Fetch register REGNO, or all registers if REGNO == -1 | |
136 | ||
137 | The Wiggler uses the following codes to access the registers: | |
138 | ||
c5aa993b JM |
139 | 0 -> 1023 SPR 0 -> 1023 |
140 | 0 - SPR 0 - MQ | |
141 | 1 - SPR 1 - XER | |
142 | 8 - SPR 8 - LR | |
143 | 9 - SPR 9 - CTR (known as cnt in GDB) | |
144 | 26 - SPR 26 - SRR0 - pc | |
145 | 1024 -> 2047 DCR 0 -> DCR 1023 (IBM PPC 4xx only) | |
146 | 2048 -> 2079 R0 -> R31 | |
147 | 2080 -> 2143 FP0 -> FP31 (64 bit regs) (IBM PPC 5xx only) | |
148 | 2144 CR (known as cnd in GDB) | |
149 | 2145 FPCSR | |
150 | 2146 MSR (known as ps in GDB) | |
c906108c SS |
151 | */ |
152 | ||
153 | static void | |
fba45db2 | 154 | bdm_ppc_fetch_registers (int regno) |
c906108c SS |
155 | { |
156 | int i; | |
157 | unsigned char *regs, *beginregs, *endregs, *almostregs; | |
158 | unsigned char midregs[32]; | |
159 | unsigned char mqreg[1]; | |
160 | int first_regno, last_regno; | |
161 | int first_bdm_regno, last_bdm_regno; | |
162 | int reglen, beginreglen, endreglen; | |
163 | ||
164 | #if 1 | |
165 | for (i = 0; i < (FPLAST_REGNUM - FP0_REGNUM + 1); i++) | |
166 | { | |
167 | midregs[i] = -1; | |
168 | } | |
169 | mqreg[0] = -1; | |
170 | #endif | |
171 | ||
172 | if (regno == -1) | |
173 | { | |
174 | first_regno = 0; | |
175 | last_regno = NUM_REGS - 1; | |
176 | ||
177 | first_bdm_regno = 0; | |
178 | last_bdm_regno = BDM_NUM_REGS - 1; | |
179 | } | |
180 | else | |
181 | { | |
182 | first_regno = regno; | |
183 | last_regno = regno; | |
184 | ||
c5aa993b JM |
185 | first_bdm_regno = bdm_regmap[regno]; |
186 | last_bdm_regno = bdm_regmap[regno]; | |
c906108c SS |
187 | } |
188 | ||
189 | if (first_bdm_regno == -1) | |
190 | { | |
191 | supply_register (first_regno, NULL); | |
192 | return; /* Unsupported register */ | |
193 | } | |
194 | ||
195 | #if 1 | |
196 | /* Can't ask for floating point regs on ppc 8xx, also need to | |
197 | avoid asking for the mq register. */ | |
198 | if (first_regno == last_regno) /* only want one reg */ | |
199 | { | |
200 | /* printf("Asking for register %d\n", first_regno); */ | |
201 | ||
202 | /* if asking for an invalid register */ | |
2188cbdd | 203 | if ((first_regno == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum) |
cb06fa07 | 204 | || (first_regno == gdbarch_tdep (current_gdbarch)->ppc_fpscr_regnum) |
2188cbdd | 205 | || ((first_regno >= FP0_REGNUM) && (first_regno <= FPLAST_REGNUM))) |
c906108c SS |
206 | { |
207 | /* printf("invalid reg request!\n"); */ | |
c5aa993b JM |
208 | supply_register (first_regno, NULL); |
209 | return; /* Unsupported register */ | |
210 | } | |
c906108c SS |
211 | else |
212 | { | |
c5aa993b JM |
213 | regs = ocd_read_bdm_registers (first_bdm_regno, |
214 | last_bdm_regno, ®len); | |
215 | } | |
c906108c | 216 | } |
c5aa993b JM |
217 | else |
218 | /* want all regs */ | |
c906108c SS |
219 | { |
220 | /* printf("Asking for registers %d to %d\n", first_regno, last_regno); */ | |
221 | beginregs = ocd_read_bdm_registers (first_bdm_regno, | |
c5aa993b JM |
222 | FP0_REGNUM - 1, &beginreglen); |
223 | endregs = (strcat (midregs, | |
224 | ocd_read_bdm_registers (FPLAST_REGNUM + 1, | |
225 | last_bdm_regno - 1, &endreglen))); | |
c906108c SS |
226 | almostregs = (strcat (beginregs, endregs)); |
227 | regs = (strcat (almostregs, mqreg)); | |
228 | reglen = beginreglen + 32 + endreglen + 1; | |
229 | } | |
230 | ||
231 | #endif | |
232 | #if 0 | |
233 | regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, ®len); | |
234 | #endif | |
235 | ||
236 | for (i = first_regno; i <= last_regno; i++) | |
237 | { | |
238 | int bdm_regno, regoffset; | |
239 | ||
c5aa993b | 240 | bdm_regno = bdm_regmap[i]; |
c906108c SS |
241 | if (bdm_regno != -1) |
242 | { | |
243 | regoffset = bdm_regno - first_bdm_regno; | |
244 | ||
245 | if (regoffset >= reglen / 4) | |
246 | continue; | |
247 | ||
248 | supply_register (i, regs + 4 * regoffset); | |
249 | } | |
250 | else | |
c5aa993b | 251 | supply_register (i, NULL); /* Unsupported register */ |
c906108c SS |
252 | } |
253 | } | |
254 | ||
255 | /* Store register REGNO, or all registers if REGNO == -1, from the contents | |
256 | of REGISTERS. FIXME: ignores errors. */ | |
257 | ||
258 | static void | |
fba45db2 | 259 | bdm_ppc_store_registers (int regno) |
c906108c SS |
260 | { |
261 | int i; | |
262 | int first_regno, last_regno; | |
263 | int first_bdm_regno, last_bdm_regno; | |
264 | ||
265 | if (regno == -1) | |
266 | { | |
267 | first_regno = 0; | |
268 | last_regno = NUM_REGS - 1; | |
269 | ||
270 | first_bdm_regno = 0; | |
271 | last_bdm_regno = BDM_NUM_REGS - 1; | |
272 | } | |
273 | else | |
274 | { | |
275 | first_regno = regno; | |
276 | last_regno = regno; | |
277 | ||
c5aa993b JM |
278 | first_bdm_regno = bdm_regmap[regno]; |
279 | last_bdm_regno = bdm_regmap[regno]; | |
c906108c SS |
280 | } |
281 | ||
282 | if (first_bdm_regno == -1) | |
283 | return; /* Unsupported register */ | |
284 | ||
285 | for (i = first_regno; i <= last_regno; i++) | |
286 | { | |
287 | int bdm_regno; | |
288 | ||
c5aa993b | 289 | bdm_regno = bdm_regmap[i]; |
c906108c SS |
290 | |
291 | /* only attempt to write if it's a valid ppc 8xx register */ | |
292 | /* (need to avoid FP regs and MQ reg) */ | |
e3f36dbd KB |
293 | if ((i != gdbarch_tdep (current_gdbarch)->ppc_mq_regnum) |
294 | && (i != gdbarch_tdep (current_gdbarch)->ppc_fpscr_regnum) | |
295 | && ((i < FP0_REGNUM) || (i > FPLAST_REGNUM))) | |
c906108c SS |
296 | { |
297 | /* printf("write valid reg %d\n", bdm_regno); */ | |
c5aa993b JM |
298 | ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4); |
299 | } | |
c906108c | 300 | /* |
2188cbdd | 301 | else if (i == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum) |
9aa1e687 | 302 | printf("don't write invalid reg %d (PPC_MQ_REGNUM)\n", bdm_regno); |
c5aa993b JM |
303 | else |
304 | printf("don't write invalid reg %d\n", bdm_regno); | |
305 | */ | |
c906108c SS |
306 | } |
307 | } | |
308 | \f | |
309 | /* Define the target subroutine names */ | |
310 | ||
c5aa993b | 311 | struct target_ops bdm_ppc_ops; |
c906108c | 312 | |
c5aa993b JM |
313 | static void |
314 | init_bdm_ppc_ops (void) | |
c906108c | 315 | { |
c5aa993b JM |
316 | bdm_ppc_ops.to_shortname = "ocd"; |
317 | bdm_ppc_ops.to_longname = "Remote target with On-Chip Debugging"; | |
318 | bdm_ppc_ops.to_doc = "Use a remote target with On-Chip Debugging. To use a target box;\n\ | |
c906108c SS |
319 | specify the serial device it is connected to (e.g. /dev/ttya). To use\n\ |
320 | a wiggler, specify wiggler and then the port it is connected to\n\ | |
c5aa993b JM |
321 | (e.g. wiggler lpt1)."; /* to_doc */ |
322 | bdm_ppc_ops.to_open = bdm_ppc_open; | |
323 | bdm_ppc_ops.to_close = ocd_close; | |
c5aa993b | 324 | bdm_ppc_ops.to_detach = ocd_detach; |
c5aa993b JM |
325 | bdm_ppc_ops.to_resume = ocd_resume; |
326 | bdm_ppc_ops.to_wait = bdm_ppc_wait; | |
c5aa993b JM |
327 | bdm_ppc_ops.to_fetch_registers = bdm_ppc_fetch_registers; |
328 | bdm_ppc_ops.to_store_registers = bdm_ppc_store_registers; | |
329 | bdm_ppc_ops.to_prepare_to_store = ocd_prepare_to_store; | |
330 | bdm_ppc_ops.to_xfer_memory = ocd_xfer_memory; | |
331 | bdm_ppc_ops.to_files_info = ocd_files_info; | |
332 | bdm_ppc_ops.to_insert_breakpoint = ocd_insert_breakpoint; | |
333 | bdm_ppc_ops.to_remove_breakpoint = ocd_remove_breakpoint; | |
c5aa993b JM |
334 | bdm_ppc_ops.to_kill = ocd_kill; |
335 | bdm_ppc_ops.to_load = ocd_load; | |
c5aa993b | 336 | bdm_ppc_ops.to_create_inferior = ocd_create_inferior; |
c5aa993b | 337 | bdm_ppc_ops.to_mourn_inferior = ocd_mourn; |
c5aa993b JM |
338 | bdm_ppc_ops.to_thread_alive = ocd_thread_alive; |
339 | bdm_ppc_ops.to_stop = ocd_stop; | |
c5aa993b | 340 | bdm_ppc_ops.to_stratum = process_stratum; |
c5aa993b JM |
341 | bdm_ppc_ops.to_has_all_memory = 1; |
342 | bdm_ppc_ops.to_has_memory = 1; | |
343 | bdm_ppc_ops.to_has_stack = 1; | |
344 | bdm_ppc_ops.to_has_registers = 1; | |
345 | bdm_ppc_ops.to_has_execution = 1; | |
c5aa993b JM |
346 | bdm_ppc_ops.to_magic = OPS_MAGIC; |
347 | } /* init_bdm_ppc_ops */ | |
c906108c SS |
348 | |
349 | void | |
fba45db2 | 350 | _initialize_bdm_ppc (void) |
c906108c | 351 | { |
c5aa993b | 352 | init_bdm_ppc_ops (); |
c906108c SS |
353 | add_target (&bdm_ppc_ops); |
354 | } |