Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Routines providing a simple monitor for use on the PowerMac. | |
3 | * | |
fca5dcd4 | 4 | * Copyright (C) 1996-2005 Paul Mackerras. |
47679283 ME |
5 | * Copyright (C) 2001 PPC64 Team, IBM Corp |
6 | * Copyrignt (C) 2006 Michael Ellerman, IBM Corp | |
1da177e4 LT |
7 | * |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/sched.h> | |
15 | #include <linux/smp.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/reboot.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/kallsyms.h> | |
20 | #include <linux/cpumask.h> | |
4b16f8e2 | 21 | #include <linux/export.h> |
fca5dcd4 | 22 | #include <linux/sysrq.h> |
4694ca02 | 23 | #include <linux/interrupt.h> |
7d12e780 | 24 | #include <linux/irq.h> |
73c9ceab | 25 | #include <linux/bug.h> |
1da177e4 LT |
26 | |
27 | #include <asm/ptrace.h> | |
28 | #include <asm/string.h> | |
29 | #include <asm/prom.h> | |
30 | #include <asm/machdep.h> | |
f78541dc | 31 | #include <asm/xmon.h> |
1da177e4 LT |
32 | #include <asm/processor.h> |
33 | #include <asm/pgtable.h> | |
34 | #include <asm/mmu.h> | |
35 | #include <asm/mmu_context.h> | |
1da177e4 LT |
36 | #include <asm/cputable.h> |
37 | #include <asm/rtas.h> | |
38 | #include <asm/sstep.h> | |
f583ffce | 39 | #include <asm/irq_regs.h> |
ff8a8f25 ME |
40 | #include <asm/spu.h> |
41 | #include <asm/spu_priv1.h> | |
1d13581d | 42 | #include <asm/firmware.h> |
c3b75bd7 | 43 | #include <asm/setjmp.h> |
322b4394 | 44 | #include <asm/reg.h> |
f78541dc PM |
45 | |
46 | #ifdef CONFIG_PPC64 | |
1da177e4 | 47 | #include <asm/hvcall.h> |
f78541dc PM |
48 | #include <asm/paca.h> |
49 | #endif | |
1da177e4 LT |
50 | |
51 | #include "nonstdio.h" | |
e0426047 | 52 | #include "dis-asm.h" |
1da177e4 LT |
53 | |
54 | #define scanhex xmon_scanhex | |
55 | #define skipbl xmon_skipbl | |
56 | ||
57 | #ifdef CONFIG_SMP | |
1c8950ff | 58 | static cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
1da177e4 LT |
59 | static unsigned long xmon_taken = 1; |
60 | static int xmon_owner; | |
61 | static int xmon_gate; | |
62 | #endif /* CONFIG_SMP */ | |
63 | ||
5be3492f | 64 | static unsigned long in_xmon __read_mostly = 0; |
1da177e4 LT |
65 | |
66 | static unsigned long adrs; | |
67 | static int size = 1; | |
68 | #define MAX_DUMP (128 * 1024) | |
69 | static unsigned long ndump = 64; | |
70 | static unsigned long nidump = 16; | |
71 | static unsigned long ncsum = 4096; | |
72 | static int termch; | |
73 | static char tmpstr[128]; | |
74 | ||
1da177e4 LT |
75 | static long bus_error_jmp[JMP_BUF_LEN]; |
76 | static int catch_memory_errors; | |
77 | static long *xmon_fault_jmp[NR_CPUS]; | |
1da177e4 LT |
78 | |
79 | /* Breakpoint stuff */ | |
80 | struct bpt { | |
81 | unsigned long address; | |
82 | unsigned int instr[2]; | |
83 | atomic_t ref_count; | |
84 | int enabled; | |
85 | unsigned long pad; | |
86 | }; | |
87 | ||
88 | /* Bits in bpt.enabled */ | |
89 | #define BP_IABR_TE 1 /* IABR translation enabled */ | |
90 | #define BP_IABR 2 | |
91 | #define BP_TRAP 8 | |
92 | #define BP_DABR 0x10 | |
93 | ||
94 | #define NBPTS 256 | |
95 | static struct bpt bpts[NBPTS]; | |
96 | static struct bpt dabr; | |
97 | static struct bpt *iabr; | |
98 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
99 | ||
100 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
101 | ||
102 | /* Prototypes */ | |
103 | static int cmds(struct pt_regs *); | |
104 | static int mread(unsigned long, void *, int); | |
105 | static int mwrite(unsigned long, void *, int); | |
106 | static int handle_fault(struct pt_regs *); | |
107 | static void byterev(unsigned char *, int); | |
108 | static void memex(void); | |
109 | static int bsesc(void); | |
110 | static void dump(void); | |
111 | static void prdump(unsigned long, long); | |
112 | static int ppc_inst_dump(unsigned long, long, int); | |
f312deb4 | 113 | static void dump_log_buf(void); |
1da177e4 LT |
114 | static void backtrace(struct pt_regs *); |
115 | static void excprint(struct pt_regs *); | |
116 | static void prregs(struct pt_regs *); | |
117 | static void memops(int); | |
118 | static void memlocate(void); | |
119 | static void memzcan(void); | |
120 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
121 | int skipbl(void); | |
122 | int scanhex(unsigned long *valp); | |
123 | static void scannl(void); | |
124 | static int hexdigit(int); | |
125 | void getstring(char *, int); | |
126 | static void flush_input(void); | |
127 | static int inchar(void); | |
128 | static void take_input(char *); | |
129 | static unsigned long read_spr(int); | |
130 | static void write_spr(int, unsigned long); | |
131 | static void super_regs(void); | |
132 | static void remove_bpts(void); | |
133 | static void insert_bpts(void); | |
134 | static void remove_cpu_bpts(void); | |
135 | static void insert_cpu_bpts(void); | |
136 | static struct bpt *at_breakpoint(unsigned long pc); | |
137 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
138 | static int do_step(struct pt_regs *); | |
139 | static void bpt_cmds(void); | |
140 | static void cacheflush(void); | |
141 | static int cpu_cmd(void); | |
142 | static void csum(void); | |
143 | static void bootcmds(void); | |
f78541dc | 144 | static void proccall(void); |
1da177e4 LT |
145 | void dump_segments(void); |
146 | static void symbol_lookup(void); | |
26c8af5f OH |
147 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
148 | unsigned long pc); | |
1da177e4 LT |
149 | static void xmon_print_symbol(unsigned long address, const char *mid, |
150 | const char *after); | |
151 | static const char *getvecname(unsigned long vec); | |
152 | ||
ff8a8f25 ME |
153 | static int do_spu_cmd(void); |
154 | ||
5a8a1a28 BH |
155 | #ifdef CONFIG_44x |
156 | static void dump_tlb_44x(void); | |
157 | #endif | |
03247157 BH |
158 | #ifdef CONFIG_PPC_BOOK3E |
159 | static void dump_tlb_book3e(void); | |
160 | #endif | |
5a8a1a28 | 161 | |
9f1067c2 | 162 | static int xmon_no_auto_backtrace; |
26c8af5f | 163 | |
f78541dc PM |
164 | extern void xmon_enter(void); |
165 | extern void xmon_leave(void); | |
166 | ||
f78541dc PM |
167 | #ifdef CONFIG_PPC64 |
168 | #define REG "%.16lx" | |
169 | #define REGS_PER_LINE 4 | |
170 | #define LAST_VOLATILE 13 | |
171 | #else | |
172 | #define REG "%.8lx" | |
173 | #define REGS_PER_LINE 8 | |
174 | #define LAST_VOLATILE 12 | |
175 | #endif | |
1da177e4 LT |
176 | |
177 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) | |
178 | ||
179 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
180 | || ('a' <= (c) && (c) <= 'f') \ | |
181 | || ('A' <= (c) && (c) <= 'F')) | |
182 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
183 | || ('a' <= (c) && (c) <= 'z') \ | |
184 | || ('A' <= (c) && (c) <= 'Z')) | |
185 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
186 | ||
187 | static char *help_string = "\ | |
188 | Commands:\n\ | |
189 | b show breakpoints\n\ | |
190 | bd set data breakpoint\n\ | |
191 | bi set instruction breakpoint\n\ | |
192 | bc clear breakpoint\n" | |
193 | #ifdef CONFIG_SMP | |
194 | "\ | |
195 | c print cpus stopped in xmon\n\ | |
196 | c# try to switch to cpu number h (in hex)\n" | |
197 | #endif | |
198 | "\ | |
199 | C checksum\n\ | |
200 | d dump bytes\n\ | |
201 | di dump instructions\n\ | |
202 | df dump float values\n\ | |
203 | dd dump double values\n\ | |
f312deb4 | 204 | dl dump the kernel log buffer\n\ |
7e5b5938 | 205 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
206 | e print exception information\n\ |
207 | f flush cache\n\ | |
208 | la lookup symbol+offset of specified address\n\ | |
209 | ls lookup address of specified symbol\n\ | |
210 | m examine/change memory\n\ | |
211 | mm move a block of memory\n\ | |
212 | ms set a block of memory\n\ | |
213 | md compare two blocks of memory\n\ | |
214 | ml locate a block of memory\n\ | |
215 | mz zero a block of memory\n\ | |
216 | mi show information about memory allocation\n\ | |
f78541dc | 217 | p call a procedure\n\ |
1da177e4 | 218 | r print registers\n\ |
ff8a8f25 | 219 | s single step\n" |
e055595d | 220 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 | 221 | " ss stop execution on all spus\n\ |
a8984970 | 222 | sr restore execution on stopped spus\n\ |
24a24c85 | 223 | sf # dump spu fields for spu # (in hex)\n\ |
c99176a2 | 224 | sd # dump spu local store for spu # (in hex)\n\ |
af89fb80 | 225 | sdi # disassemble spu local store for spu # (in hex)\n" |
ff8a8f25 ME |
226 | #endif |
227 | " S print special registers\n\ | |
1da177e4 | 228 | t print backtrace\n\ |
1da177e4 | 229 | x exit monitor and recover\n\ |
f78541dc | 230 | X exit monitor and dont recover\n" |
79873e8d | 231 | #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) |
f78541dc | 232 | " u dump segment table or SLB\n" |
79873e8d | 233 | #elif defined(CONFIG_PPC_STD_MMU_32) |
f78541dc | 234 | " u dump segment registers\n" |
79873e8d | 235 | #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) |
5a8a1a28 BH |
236 | " u dump TLB\n" |
237 | #endif | |
f78541dc PM |
238 | " ? help\n" |
239 | " zr reboot\n\ | |
1da177e4 LT |
240 | zh halt\n" |
241 | ; | |
242 | ||
243 | static struct pt_regs *xmon_regs; | |
244 | ||
f78541dc | 245 | static inline void sync(void) |
1da177e4 LT |
246 | { |
247 | asm volatile("sync; isync"); | |
248 | } | |
249 | ||
f78541dc PM |
250 | static inline void store_inst(void *p) |
251 | { | |
252 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
253 | } | |
254 | ||
255 | static inline void cflush(void *p) | |
256 | { | |
257 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
258 | } | |
259 | ||
260 | static inline void cinval(void *p) | |
261 | { | |
262 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
263 | } | |
1da177e4 LT |
264 | |
265 | /* | |
266 | * Disable surveillance (the service processor watchdog function) | |
267 | * while we are in xmon. | |
268 | * XXX we should re-enable it when we leave. :) | |
269 | */ | |
270 | #define SURVEILLANCE_TOKEN 9000 | |
271 | ||
272 | static inline void disable_surveillance(void) | |
273 | { | |
274 | #ifdef CONFIG_PPC_PSERIES | |
275 | /* Since this can't be a module, args should end up below 4GB. */ | |
276 | static struct rtas_args args; | |
277 | ||
278 | /* | |
279 | * At this point we have got all the cpus we can into | |
280 | * xmon, so there is hopefully no other cpu calling RTAS | |
281 | * at the moment, even though we don't take rtas.lock. | |
282 | * If we did try to take rtas.lock there would be a | |
283 | * real possibility of deadlock. | |
284 | */ | |
285 | args.token = rtas_token("set-indicator"); | |
286 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
287 | return; | |
288 | args.nargs = 3; | |
289 | args.nret = 1; | |
290 | args.rets = &args.args[3]; | |
291 | args.args[0] = SURVEILLANCE_TOKEN; | |
292 | args.args[1] = 0; | |
293 | args.args[2] = 0; | |
294 | enter_rtas(__pa(&args)); | |
295 | #endif /* CONFIG_PPC_PSERIES */ | |
296 | } | |
297 | ||
298 | #ifdef CONFIG_SMP | |
299 | static int xmon_speaker; | |
300 | ||
301 | static void get_output_lock(void) | |
302 | { | |
303 | int me = smp_processor_id() + 0x100; | |
304 | int last_speaker = 0, prev; | |
305 | long timeout; | |
306 | ||
307 | if (xmon_speaker == me) | |
308 | return; | |
309 | for (;;) { | |
310 | if (xmon_speaker == 0) { | |
311 | last_speaker = cmpxchg(&xmon_speaker, 0, me); | |
312 | if (last_speaker == 0) | |
313 | return; | |
314 | } | |
315 | timeout = 10000000; | |
316 | while (xmon_speaker == last_speaker) { | |
317 | if (--timeout > 0) | |
318 | continue; | |
319 | /* hostile takeover */ | |
320 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
321 | if (prev == last_speaker) | |
322 | return; | |
323 | break; | |
324 | } | |
325 | } | |
326 | } | |
327 | ||
328 | static void release_output_lock(void) | |
329 | { | |
330 | xmon_speaker = 0; | |
331 | } | |
1c8950ff ME |
332 | |
333 | int cpus_are_in_xmon(void) | |
334 | { | |
104699c0 | 335 | return !cpumask_empty(&cpus_in_xmon); |
1c8950ff | 336 | } |
1da177e4 LT |
337 | #endif |
338 | ||
daf8f403 JB |
339 | static inline int unrecoverable_excp(struct pt_regs *regs) |
340 | { | |
08f6d6ab | 341 | #if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E) |
66857b3a | 342 | /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */ |
daf8f403 JB |
343 | return 0; |
344 | #else | |
345 | return ((regs->msr & MSR_RI) == 0); | |
346 | #endif | |
347 | } | |
348 | ||
b0da9856 | 349 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
350 | { |
351 | int cmd = 0; | |
1da177e4 LT |
352 | struct bpt *bp; |
353 | long recurse_jmp[JMP_BUF_LEN]; | |
354 | unsigned long offset; | |
f13659e0 | 355 | unsigned long flags; |
1da177e4 LT |
356 | #ifdef CONFIG_SMP |
357 | int cpu; | |
358 | int secondary; | |
359 | unsigned long timeout; | |
360 | #endif | |
361 | ||
f13659e0 | 362 | local_irq_save(flags); |
1da177e4 LT |
363 | |
364 | bp = in_breakpoint_table(regs->nip, &offset); | |
365 | if (bp != NULL) { | |
366 | regs->nip = bp->address + offset; | |
367 | atomic_dec(&bp->ref_count); | |
368 | } | |
369 | ||
370 | remove_cpu_bpts(); | |
371 | ||
372 | #ifdef CONFIG_SMP | |
373 | cpu = smp_processor_id(); | |
104699c0 | 374 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
375 | get_output_lock(); |
376 | excprint(regs); | |
377 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
378 | "returning to main loop\n", | |
379 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 380 | release_output_lock(); |
1da177e4 LT |
381 | longjmp(xmon_fault_jmp[cpu], 1); |
382 | } | |
383 | ||
384 | if (setjmp(recurse_jmp) != 0) { | |
385 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 386 | get_output_lock(); |
1da177e4 LT |
387 | printf("xmon: WARNING: bad recursive fault " |
388 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 389 | release_output_lock(); |
1da177e4 LT |
390 | goto waiting; |
391 | } | |
392 | secondary = !(xmon_taken && cpu == xmon_owner); | |
393 | goto cmdloop; | |
394 | } | |
395 | ||
396 | xmon_fault_jmp[cpu] = recurse_jmp; | |
104699c0 | 397 | cpumask_set_cpu(cpu, &cpus_in_xmon); |
1da177e4 LT |
398 | |
399 | bp = NULL; | |
9f0b0793 | 400 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
1da177e4 | 401 | bp = at_breakpoint(regs->nip); |
daf8f403 | 402 | if (bp || unrecoverable_excp(regs)) |
1da177e4 LT |
403 | fromipi = 0; |
404 | ||
405 | if (!fromipi) { | |
406 | get_output_lock(); | |
407 | excprint(regs); | |
408 | if (bp) { | |
409 | printf("cpu 0x%x stopped at breakpoint 0x%x (", | |
410 | cpu, BP_NUM(bp)); | |
411 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
412 | } | |
daf8f403 | 413 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
414 | printf("WARNING: exception is not recoverable, " |
415 | "can't continue\n"); | |
416 | release_output_lock(); | |
417 | } | |
418 | ||
419 | waiting: | |
420 | secondary = 1; | |
421 | while (secondary && !xmon_gate) { | |
422 | if (in_xmon == 0) { | |
423 | if (fromipi) | |
424 | goto leave; | |
425 | secondary = test_and_set_bit(0, &in_xmon); | |
426 | } | |
427 | barrier(); | |
428 | } | |
429 | ||
430 | if (!secondary && !xmon_gate) { | |
431 | /* we are the first cpu to come in */ | |
432 | /* interrupt other cpu(s) */ | |
433 | int ncpus = num_online_cpus(); | |
434 | ||
435 | xmon_owner = cpu; | |
436 | mb(); | |
437 | if (ncpus > 1) { | |
e0476371 | 438 | smp_send_debugger_break(); |
1da177e4 LT |
439 | /* wait for other cpus to come in */ |
440 | for (timeout = 100000000; timeout != 0; --timeout) { | |
104699c0 | 441 | if (cpumask_weight(&cpus_in_xmon) >= ncpus) |
1da177e4 LT |
442 | break; |
443 | barrier(); | |
444 | } | |
445 | } | |
446 | remove_bpts(); | |
447 | disable_surveillance(); | |
448 | /* for breakpoint or single step, print the current instr. */ | |
449 | if (bp || TRAP(regs) == 0xd00) | |
450 | ppc_inst_dump(regs->nip, 1, 0); | |
451 | printf("enter ? for help\n"); | |
452 | mb(); | |
453 | xmon_gate = 1; | |
454 | barrier(); | |
455 | } | |
456 | ||
457 | cmdloop: | |
458 | while (in_xmon) { | |
459 | if (secondary) { | |
460 | if (cpu == xmon_owner) { | |
461 | if (!test_and_set_bit(0, &xmon_taken)) { | |
462 | secondary = 0; | |
463 | continue; | |
464 | } | |
465 | /* missed it */ | |
466 | while (cpu == xmon_owner) | |
467 | barrier(); | |
468 | } | |
469 | barrier(); | |
470 | } else { | |
471 | cmd = cmds(regs); | |
472 | if (cmd != 0) { | |
473 | /* exiting xmon */ | |
474 | insert_bpts(); | |
475 | xmon_gate = 0; | |
476 | wmb(); | |
477 | in_xmon = 0; | |
478 | break; | |
479 | } | |
480 | /* have switched to some other cpu */ | |
481 | secondary = 1; | |
482 | } | |
483 | } | |
484 | leave: | |
104699c0 | 485 | cpumask_clear_cpu(cpu, &cpus_in_xmon); |
1da177e4 | 486 | xmon_fault_jmp[cpu] = NULL; |
1da177e4 LT |
487 | #else |
488 | /* UP is simple... */ | |
489 | if (in_xmon) { | |
490 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
491 | regs->trap, getvecname(TRAP(regs))); | |
492 | longjmp(xmon_fault_jmp[0], 1); | |
493 | } | |
494 | if (setjmp(recurse_jmp) == 0) { | |
495 | xmon_fault_jmp[0] = recurse_jmp; | |
496 | in_xmon = 1; | |
497 | ||
498 | excprint(regs); | |
499 | bp = at_breakpoint(regs->nip); | |
500 | if (bp) { | |
501 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); | |
502 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
503 | } | |
daf8f403 | 504 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
505 | printf("WARNING: exception is not recoverable, " |
506 | "can't continue\n"); | |
507 | remove_bpts(); | |
508 | disable_surveillance(); | |
509 | /* for breakpoint or single step, print the current instr. */ | |
510 | if (bp || TRAP(regs) == 0xd00) | |
511 | ppc_inst_dump(regs->nip, 1, 0); | |
512 | printf("enter ? for help\n"); | |
513 | } | |
514 | ||
515 | cmd = cmds(regs); | |
516 | ||
517 | insert_bpts(); | |
518 | in_xmon = 0; | |
519 | #endif | |
520 | ||
cdd3904d JB |
521 | #ifdef CONFIG_BOOKE |
522 | if (regs->msr & MSR_DE) { | |
523 | bp = at_breakpoint(regs->nip); | |
524 | if (bp != NULL) { | |
525 | regs->nip = (unsigned long) &bp->instr[0]; | |
526 | atomic_inc(&bp->ref_count); | |
527 | } | |
528 | } | |
529 | #else | |
9f0b0793 | 530 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
531 | bp = at_breakpoint(regs->nip); |
532 | if (bp != NULL) { | |
533 | int stepped = emulate_step(regs, bp->instr[0]); | |
534 | if (stepped == 0) { | |
535 | regs->nip = (unsigned long) &bp->instr[0]; | |
536 | atomic_inc(&bp->ref_count); | |
537 | } else if (stepped < 0) { | |
538 | printf("Couldn't single-step %s instruction\n", | |
539 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
540 | } | |
541 | } | |
542 | } | |
cdd3904d | 543 | #endif |
1da177e4 LT |
544 | insert_cpu_bpts(); |
545 | ||
f13659e0 | 546 | local_irq_restore(flags); |
1da177e4 | 547 | |
0a730ae5 | 548 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
549 | } |
550 | ||
551 | int xmon(struct pt_regs *excp) | |
552 | { | |
553 | struct pt_regs regs; | |
554 | ||
555 | if (excp == NULL) { | |
322b4394 | 556 | ppc_save_regs(®s); |
1da177e4 LT |
557 | excp = ®s; |
558 | } | |
ff8a8f25 | 559 | |
1da177e4 LT |
560 | return xmon_core(excp, 0); |
561 | } | |
f78541dc PM |
562 | EXPORT_SYMBOL(xmon); |
563 | ||
f583ffce | 564 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
565 | { |
566 | unsigned long flags; | |
567 | local_irq_save(flags); | |
568 | printf("Keyboard interrupt\n"); | |
f583ffce | 569 | xmon(get_irq_regs()); |
f78541dc PM |
570 | local_irq_restore(flags); |
571 | return IRQ_HANDLED; | |
572 | } | |
1da177e4 | 573 | |
b0da9856 | 574 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
575 | { |
576 | struct bpt *bp; | |
577 | unsigned long offset; | |
578 | ||
9f0b0793 | 579 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 LT |
580 | return 0; |
581 | ||
582 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
583 | bp = in_breakpoint_table(regs->nip, &offset); | |
584 | if (bp != NULL && offset == 4) { | |
585 | regs->nip = bp->address + 4; | |
586 | atomic_dec(&bp->ref_count); | |
587 | return 1; | |
588 | } | |
589 | ||
590 | /* Are we at a breakpoint? */ | |
591 | bp = at_breakpoint(regs->nip); | |
592 | if (!bp) | |
593 | return 0; | |
594 | ||
595 | xmon_core(regs, 0); | |
596 | ||
597 | return 1; | |
598 | } | |
599 | ||
b0da9856 | 600 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
601 | { |
602 | if (user_mode(regs)) | |
603 | return 0; | |
604 | xmon_core(regs, 0); | |
605 | return 1; | |
606 | } | |
607 | ||
b0da9856 | 608 | static int xmon_dabr_match(struct pt_regs *regs) |
1da177e4 | 609 | { |
9f0b0793 | 610 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 611 | return 0; |
fd9648df AB |
612 | if (dabr.enabled == 0) |
613 | return 0; | |
1da177e4 LT |
614 | xmon_core(regs, 0); |
615 | return 1; | |
616 | } | |
617 | ||
b0da9856 | 618 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 | 619 | { |
9f0b0793 | 620 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 621 | return 0; |
9f1067c2 | 622 | if (iabr == NULL) |
1da177e4 LT |
623 | return 0; |
624 | xmon_core(regs, 0); | |
625 | return 1; | |
626 | } | |
627 | ||
b0da9856 | 628 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
629 | { |
630 | #ifdef CONFIG_SMP | |
104699c0 | 631 | if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
1da177e4 LT |
632 | xmon_core(regs, 1); |
633 | #endif | |
634 | return 0; | |
635 | } | |
636 | ||
b0da9856 | 637 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
638 | { |
639 | struct bpt *bp; | |
640 | unsigned long offset; | |
641 | ||
642 | if (in_xmon && catch_memory_errors) | |
643 | handle_fault(regs); /* doesn't return */ | |
644 | ||
9f0b0793 | 645 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
646 | bp = in_breakpoint_table(regs->nip, &offset); |
647 | if (bp != NULL) { | |
648 | regs->nip = bp->address + offset; | |
649 | atomic_dec(&bp->ref_count); | |
650 | } | |
651 | } | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
1da177e4 LT |
656 | static struct bpt *at_breakpoint(unsigned long pc) |
657 | { | |
658 | int i; | |
659 | struct bpt *bp; | |
660 | ||
661 | bp = bpts; | |
662 | for (i = 0; i < NBPTS; ++i, ++bp) | |
663 | if (bp->enabled && pc == bp->address) | |
664 | return bp; | |
665 | return NULL; | |
666 | } | |
667 | ||
668 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
669 | { | |
670 | unsigned long off; | |
671 | ||
672 | off = nip - (unsigned long) bpts; | |
673 | if (off >= sizeof(bpts)) | |
674 | return NULL; | |
675 | off %= sizeof(struct bpt); | |
676 | if (off != offsetof(struct bpt, instr[0]) | |
677 | && off != offsetof(struct bpt, instr[1])) | |
678 | return NULL; | |
679 | *offp = off - offsetof(struct bpt, instr[0]); | |
680 | return (struct bpt *) (nip - off); | |
681 | } | |
682 | ||
683 | static struct bpt *new_breakpoint(unsigned long a) | |
684 | { | |
685 | struct bpt *bp; | |
686 | ||
687 | a &= ~3UL; | |
688 | bp = at_breakpoint(a); | |
689 | if (bp) | |
690 | return bp; | |
691 | ||
692 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
693 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
694 | bp->address = a; | |
695 | bp->instr[1] = bpinstr; | |
696 | store_inst(&bp->instr[1]); | |
697 | return bp; | |
698 | } | |
699 | } | |
700 | ||
701 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
702 | return NULL; | |
703 | } | |
704 | ||
705 | static void insert_bpts(void) | |
706 | { | |
707 | int i; | |
708 | struct bpt *bp; | |
709 | ||
710 | bp = bpts; | |
711 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
712 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) | |
713 | continue; | |
714 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
715 | printf("Couldn't read instruction at %lx, " | |
716 | "disabling breakpoint there\n", bp->address); | |
717 | bp->enabled = 0; | |
718 | continue; | |
719 | } | |
720 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
721 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
722 | "instruction, disabling it\n", bp->address); | |
723 | bp->enabled = 0; | |
724 | continue; | |
725 | } | |
726 | store_inst(&bp->instr[0]); | |
727 | if (bp->enabled & BP_IABR) | |
728 | continue; | |
729 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
730 | printf("Couldn't write instruction at %lx, " | |
731 | "disabling breakpoint there\n", bp->address); | |
732 | bp->enabled &= ~BP_TRAP; | |
733 | continue; | |
734 | } | |
735 | store_inst((void *)bp->address); | |
736 | } | |
737 | } | |
738 | ||
739 | static void insert_cpu_bpts(void) | |
740 | { | |
741 | if (dabr.enabled) | |
fd9648df | 742 | set_dabr(dabr.address | (dabr.enabled & 7)); |
1da177e4 | 743 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 744 | mtspr(SPRN_IABR, iabr->address |
1da177e4 LT |
745 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
746 | } | |
747 | ||
748 | static void remove_bpts(void) | |
749 | { | |
750 | int i; | |
751 | struct bpt *bp; | |
752 | unsigned instr; | |
753 | ||
754 | bp = bpts; | |
755 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
756 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) | |
757 | continue; | |
758 | if (mread(bp->address, &instr, 4) == 4 | |
759 | && instr == bpinstr | |
760 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
761 | printf("Couldn't remove breakpoint at %lx\n", | |
762 | bp->address); | |
763 | else | |
764 | store_inst((void *)bp->address); | |
765 | } | |
766 | } | |
767 | ||
768 | static void remove_cpu_bpts(void) | |
769 | { | |
fd9648df | 770 | set_dabr(0); |
1da177e4 | 771 | if (cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 772 | mtspr(SPRN_IABR, 0); |
1da177e4 LT |
773 | } |
774 | ||
775 | /* Command interpreting routine */ | |
776 | static char *last_cmd; | |
777 | ||
778 | static int | |
779 | cmds(struct pt_regs *excp) | |
780 | { | |
781 | int cmd = 0; | |
782 | ||
783 | last_cmd = NULL; | |
784 | xmon_regs = excp; | |
26c8af5f OH |
785 | |
786 | if (!xmon_no_auto_backtrace) { | |
787 | xmon_no_auto_backtrace = 1; | |
788 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
789 | } | |
790 | ||
1da177e4 LT |
791 | for(;;) { |
792 | #ifdef CONFIG_SMP | |
793 | printf("%x:", smp_processor_id()); | |
794 | #endif /* CONFIG_SMP */ | |
795 | printf("mon> "); | |
1da177e4 LT |
796 | flush_input(); |
797 | termch = 0; | |
798 | cmd = skipbl(); | |
799 | if( cmd == '\n' ) { | |
800 | if (last_cmd == NULL) | |
801 | continue; | |
802 | take_input(last_cmd); | |
803 | last_cmd = NULL; | |
804 | cmd = inchar(); | |
805 | } | |
806 | switch (cmd) { | |
807 | case 'm': | |
808 | cmd = inchar(); | |
809 | switch (cmd) { | |
810 | case 'm': | |
811 | case 's': | |
812 | case 'd': | |
813 | memops(cmd); | |
814 | break; | |
815 | case 'l': | |
816 | memlocate(); | |
817 | break; | |
818 | case 'z': | |
819 | memzcan(); | |
820 | break; | |
821 | case 'i': | |
b2b755b5 | 822 | show_mem(0); |
1da177e4 LT |
823 | break; |
824 | default: | |
825 | termch = cmd; | |
826 | memex(); | |
827 | } | |
828 | break; | |
829 | case 'd': | |
830 | dump(); | |
831 | break; | |
832 | case 'l': | |
833 | symbol_lookup(); | |
834 | break; | |
835 | case 'r': | |
836 | prregs(excp); /* print regs */ | |
837 | break; | |
838 | case 'e': | |
839 | excprint(excp); | |
840 | break; | |
841 | case 'S': | |
842 | super_regs(); | |
843 | break; | |
844 | case 't': | |
845 | backtrace(excp); | |
846 | break; | |
847 | case 'f': | |
848 | cacheflush(); | |
849 | break; | |
850 | case 's': | |
ff8a8f25 ME |
851 | if (do_spu_cmd() == 0) |
852 | break; | |
1da177e4 LT |
853 | if (do_step(excp)) |
854 | return cmd; | |
855 | break; | |
856 | case 'x': | |
857 | case 'X': | |
bb6b9b28 | 858 | return cmd; |
1da177e4 | 859 | case EOF: |
bb6b9b28 BH |
860 | printf(" <no input ...>\n"); |
861 | mdelay(2000); | |
1da177e4 LT |
862 | return cmd; |
863 | case '?': | |
4d404edc | 864 | xmon_puts(help_string); |
1da177e4 | 865 | break; |
1da177e4 LT |
866 | case 'b': |
867 | bpt_cmds(); | |
868 | break; | |
869 | case 'C': | |
870 | csum(); | |
871 | break; | |
872 | case 'c': | |
873 | if (cpu_cmd()) | |
874 | return 0; | |
875 | break; | |
876 | case 'z': | |
877 | bootcmds(); | |
878 | break; | |
f78541dc PM |
879 | case 'p': |
880 | proccall(); | |
1da177e4 | 881 | break; |
f78541dc | 882 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
883 | case 'u': |
884 | dump_segments(); | |
885 | break; | |
79873e8d | 886 | #elif defined(CONFIG_4xx) |
5a8a1a28 BH |
887 | case 'u': |
888 | dump_tlb_44x(); | |
889 | break; | |
79873e8d | 890 | #elif defined(CONFIG_PPC_BOOK3E) |
03247157 BH |
891 | case 'u': |
892 | dump_tlb_book3e(); | |
893 | break; | |
f78541dc | 894 | #endif |
1da177e4 LT |
895 | default: |
896 | printf("Unrecognized command: "); | |
897 | do { | |
898 | if (' ' < cmd && cmd <= '~') | |
899 | putchar(cmd); | |
900 | else | |
901 | printf("\\x%x", cmd); | |
902 | cmd = inchar(); | |
903 | } while (cmd != '\n'); | |
904 | printf(" (type ? for help)\n"); | |
905 | break; | |
906 | } | |
907 | } | |
908 | } | |
909 | ||
cdd3904d JB |
910 | #ifdef CONFIG_BOOKE |
911 | static int do_step(struct pt_regs *regs) | |
912 | { | |
913 | regs->msr |= MSR_DE; | |
914 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
915 | return 1; | |
916 | } | |
917 | #else | |
1da177e4 LT |
918 | /* |
919 | * Step a single instruction. | |
920 | * Some instructions we emulate, others we execute with MSR_SE set. | |
921 | */ | |
922 | static int do_step(struct pt_regs *regs) | |
923 | { | |
924 | unsigned int instr; | |
925 | int stepped; | |
926 | ||
927 | /* check we are in 64-bit kernel mode, translation enabled */ | |
9f0b0793 | 928 | if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
1da177e4 LT |
929 | if (mread(regs->nip, &instr, 4) == 4) { |
930 | stepped = emulate_step(regs, instr); | |
931 | if (stepped < 0) { | |
932 | printf("Couldn't single-step %s instruction\n", | |
933 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
934 | return 0; | |
935 | } | |
936 | if (stepped > 0) { | |
937 | regs->trap = 0xd00 | (regs->trap & 1); | |
938 | printf("stepped to "); | |
939 | xmon_print_symbol(regs->nip, " ", "\n"); | |
940 | ppc_inst_dump(regs->nip, 1, 0); | |
941 | return 0; | |
942 | } | |
943 | } | |
944 | } | |
945 | regs->msr |= MSR_SE; | |
946 | return 1; | |
947 | } | |
cdd3904d | 948 | #endif |
1da177e4 LT |
949 | |
950 | static void bootcmds(void) | |
951 | { | |
952 | int cmd; | |
953 | ||
954 | cmd = inchar(); | |
955 | if (cmd == 'r') | |
956 | ppc_md.restart(NULL); | |
957 | else if (cmd == 'h') | |
958 | ppc_md.halt(); | |
959 | else if (cmd == 'p') | |
960 | ppc_md.power_off(); | |
961 | } | |
962 | ||
963 | static int cpu_cmd(void) | |
964 | { | |
965 | #ifdef CONFIG_SMP | |
966 | unsigned long cpu; | |
967 | int timeout; | |
968 | int count; | |
969 | ||
970 | if (!scanhex(&cpu)) { | |
971 | /* print cpus waiting or in xmon */ | |
972 | printf("cpus stopped:"); | |
973 | count = 0; | |
974 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { | |
104699c0 | 975 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
976 | if (count == 0) |
977 | printf(" %x", cpu); | |
978 | ++count; | |
979 | } else { | |
980 | if (count > 1) | |
981 | printf("-%x", cpu - 1); | |
982 | count = 0; | |
983 | } | |
984 | } | |
985 | if (count > 1) | |
986 | printf("-%x", NR_CPUS - 1); | |
987 | printf("\n"); | |
988 | return 0; | |
989 | } | |
990 | /* try to switch to cpu specified */ | |
104699c0 | 991 | if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
992 | printf("cpu 0x%x isn't in xmon\n", cpu); |
993 | return 0; | |
994 | } | |
995 | xmon_taken = 0; | |
996 | mb(); | |
997 | xmon_owner = cpu; | |
998 | timeout = 10000000; | |
999 | while (!xmon_taken) { | |
1000 | if (--timeout == 0) { | |
1001 | if (test_and_set_bit(0, &xmon_taken)) | |
1002 | break; | |
1003 | /* take control back */ | |
1004 | mb(); | |
1005 | xmon_owner = smp_processor_id(); | |
1006 | printf("cpu %u didn't take control\n", cpu); | |
1007 | return 0; | |
1008 | } | |
1009 | barrier(); | |
1010 | } | |
1011 | return 1; | |
1012 | #else | |
1013 | return 0; | |
1014 | #endif /* CONFIG_SMP */ | |
1015 | } | |
1016 | ||
1017 | static unsigned short fcstab[256] = { | |
1018 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
1019 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
1020 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
1021 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
1022 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
1023 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
1024 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
1025 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
1026 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
1027 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
1028 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
1029 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
1030 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
1031 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
1032 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
1033 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
1034 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
1035 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
1036 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
1037 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
1038 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
1039 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1040 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1041 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1042 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1043 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1044 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1045 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1046 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1047 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1048 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1049 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1050 | }; | |
1051 | ||
1052 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1053 | ||
1054 | static void | |
1055 | csum(void) | |
1056 | { | |
1057 | unsigned int i; | |
1058 | unsigned short fcs; | |
1059 | unsigned char v; | |
1060 | ||
1061 | if (!scanhex(&adrs)) | |
1062 | return; | |
1063 | if (!scanhex(&ncsum)) | |
1064 | return; | |
1065 | fcs = 0xffff; | |
1066 | for (i = 0; i < ncsum; ++i) { | |
1067 | if (mread(adrs+i, &v, 1) == 0) { | |
1068 | printf("csum stopped at %x\n", adrs+i); | |
1069 | break; | |
1070 | } | |
1071 | fcs = FCS(fcs, v); | |
1072 | } | |
1073 | printf("%x\n", fcs); | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * Check if this is a suitable place to put a breakpoint. | |
1078 | */ | |
1079 | static long check_bp_loc(unsigned long addr) | |
1080 | { | |
1081 | unsigned int instr; | |
1082 | ||
1083 | addr &= ~3; | |
51fae6de | 1084 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1085 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1086 | return 0; | |
1087 | } | |
1088 | if (!mread(addr, &instr, sizeof(instr))) { | |
1089 | printf("Can't read instruction at address %lx\n", addr); | |
1090 | return 0; | |
1091 | } | |
1092 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1093 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1094 | "instructions\n"); | |
1095 | return 0; | |
1096 | } | |
1097 | return 1; | |
1098 | } | |
1099 | ||
1100 | static char *breakpoint_help_string = | |
1101 | "Breakpoint command usage:\n" | |
1102 | "b show breakpoints\n" | |
1103 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1104 | "bc clear all breakpoints\n" | |
1105 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1106 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" | |
1107 | "bd <addr> [cnt] set hardware data breakpoint\n" | |
1108 | ""; | |
1109 | ||
1110 | static void | |
1111 | bpt_cmds(void) | |
1112 | { | |
1113 | int cmd; | |
1114 | unsigned long a; | |
1115 | int mode, i; | |
1116 | struct bpt *bp; | |
1117 | const char badaddr[] = "Only kernel addresses are permitted " | |
1118 | "for breakpoints\n"; | |
1119 | ||
1120 | cmd = inchar(); | |
1121 | switch (cmd) { | |
f78541dc | 1122 | #ifndef CONFIG_8xx |
1da177e4 LT |
1123 | case 'd': /* bd - hardware data breakpoint */ |
1124 | mode = 7; | |
1125 | cmd = inchar(); | |
1126 | if (cmd == 'r') | |
1127 | mode = 5; | |
1128 | else if (cmd == 'w') | |
1129 | mode = 6; | |
1130 | else | |
1131 | termch = cmd; | |
1132 | dabr.address = 0; | |
1133 | dabr.enabled = 0; | |
1134 | if (scanhex(&dabr.address)) { | |
51fae6de | 1135 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1136 | printf(badaddr); |
1137 | break; | |
1138 | } | |
1139 | dabr.address &= ~7; | |
1140 | dabr.enabled = mode | BP_DABR; | |
1141 | } | |
1142 | break; | |
1143 | ||
1144 | case 'i': /* bi - hardware instr breakpoint */ | |
1145 | if (!cpu_has_feature(CPU_FTR_IABR)) { | |
1146 | printf("Hardware instruction breakpoint " | |
1147 | "not supported on this cpu\n"); | |
1148 | break; | |
1149 | } | |
1150 | if (iabr) { | |
1151 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); | |
1152 | iabr = NULL; | |
1153 | } | |
1154 | if (!scanhex(&a)) | |
1155 | break; | |
1156 | if (!check_bp_loc(a)) | |
1157 | break; | |
1158 | bp = new_breakpoint(a); | |
1159 | if (bp != NULL) { | |
1160 | bp->enabled |= BP_IABR | BP_IABR_TE; | |
1161 | iabr = bp; | |
1162 | } | |
1163 | break; | |
f78541dc | 1164 | #endif |
1da177e4 LT |
1165 | |
1166 | case 'c': | |
1167 | if (!scanhex(&a)) { | |
1168 | /* clear all breakpoints */ | |
1169 | for (i = 0; i < NBPTS; ++i) | |
1170 | bpts[i].enabled = 0; | |
1171 | iabr = NULL; | |
1172 | dabr.enabled = 0; | |
1173 | printf("All breakpoints cleared\n"); | |
1174 | break; | |
1175 | } | |
1176 | ||
1177 | if (a <= NBPTS && a >= 1) { | |
1178 | /* assume a breakpoint number */ | |
1179 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1180 | } else { | |
1181 | /* assume a breakpoint address */ | |
1182 | bp = at_breakpoint(a); | |
9f1067c2 | 1183 | if (bp == NULL) { |
1da177e4 LT |
1184 | printf("No breakpoint at %x\n", a); |
1185 | break; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | printf("Cleared breakpoint %x (", BP_NUM(bp)); | |
1190 | xmon_print_symbol(bp->address, " ", ")\n"); | |
1191 | bp->enabled = 0; | |
1192 | break; | |
1193 | ||
1194 | default: | |
1195 | termch = cmd; | |
1196 | cmd = skipbl(); | |
1197 | if (cmd == '?') { | |
1198 | printf(breakpoint_help_string); | |
1199 | break; | |
1200 | } | |
1201 | termch = cmd; | |
1202 | if (!scanhex(&a)) { | |
1203 | /* print all breakpoints */ | |
1204 | printf(" type address\n"); | |
1205 | if (dabr.enabled) { | |
f78541dc | 1206 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1207 | if (dabr.enabled & 1) |
1208 | printf("r"); | |
1209 | if (dabr.enabled & 2) | |
1210 | printf("w"); | |
1211 | printf("]\n"); | |
1212 | } | |
1213 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1214 | if (!bp->enabled) | |
1215 | continue; | |
1216 | printf("%2x %s ", BP_NUM(bp), | |
1217 | (bp->enabled & BP_IABR)? "inst": "trap"); | |
1218 | xmon_print_symbol(bp->address, " ", "\n"); | |
1219 | } | |
1220 | break; | |
1221 | } | |
1222 | ||
1223 | if (!check_bp_loc(a)) | |
1224 | break; | |
1225 | bp = new_breakpoint(a); | |
1226 | if (bp != NULL) | |
1227 | bp->enabled |= BP_TRAP; | |
1228 | break; | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | /* Very cheap human name for vector lookup. */ | |
1233 | static | |
1234 | const char *getvecname(unsigned long vec) | |
1235 | { | |
1236 | char *ret; | |
1237 | ||
1238 | switch (vec) { | |
1239 | case 0x100: ret = "(System Reset)"; break; | |
1240 | case 0x200: ret = "(Machine Check)"; break; | |
1241 | case 0x300: ret = "(Data Access)"; break; | |
1242 | case 0x380: ret = "(Data SLB Access)"; break; | |
1243 | case 0x400: ret = "(Instruction Access)"; break; | |
1244 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1245 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1246 | case 0x600: ret = "(Alignment)"; break; | |
1247 | case 0x700: ret = "(Program Check)"; break; | |
1248 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1249 | case 0x900: ret = "(Decrementer)"; break; | |
1250 | case 0xc00: ret = "(System Call)"; break; | |
1251 | case 0xd00: ret = "(Single Step)"; break; | |
1252 | case 0xf00: ret = "(Performance Monitor)"; break; | |
1253 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1254 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
1255 | default: ret = ""; | |
1256 | } | |
1257 | return ret; | |
1258 | } | |
1259 | ||
1260 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1261 | unsigned long *endp) | |
1262 | { | |
1263 | unsigned long size, offset; | |
1264 | const char *name; | |
1da177e4 LT |
1265 | |
1266 | *startp = *endp = 0; | |
1267 | if (pc == 0) | |
1268 | return; | |
1269 | if (setjmp(bus_error_jmp) == 0) { | |
1270 | catch_memory_errors = 1; | |
1271 | sync(); | |
ffb45122 | 1272 | name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
1da177e4 LT |
1273 | if (name != NULL) { |
1274 | *startp = pc - offset; | |
1275 | *endp = pc - offset + size; | |
1276 | } | |
1277 | sync(); | |
1278 | } | |
1279 | catch_memory_errors = 0; | |
1280 | } | |
1281 | ||
1282 | static int xmon_depth_to_print = 64; | |
1283 | ||
ec2b36b9 BH |
1284 | #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
1285 | #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) | |
1286 | ||
1287 | #ifdef __powerpc64__ | |
f78541dc PM |
1288 | #define REGS_OFFSET 0x70 |
1289 | #else | |
f78541dc PM |
1290 | #define REGS_OFFSET 16 |
1291 | #endif | |
1292 | ||
1da177e4 LT |
1293 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1294 | unsigned long pc) | |
1295 | { | |
1296 | unsigned long ip; | |
1297 | unsigned long newsp; | |
1298 | unsigned long marker; | |
1299 | int count = 0; | |
1300 | struct pt_regs regs; | |
1301 | ||
1302 | do { | |
1303 | if (sp < PAGE_OFFSET) { | |
1304 | if (sp != 0) | |
1305 | printf("SP (%lx) is in userspace\n", sp); | |
1306 | break; | |
1307 | } | |
1308 | ||
f78541dc | 1309 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1310 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1311 | printf("Couldn't read stack frame at %lx\n", sp); | |
1312 | break; | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * For the first stack frame, try to work out if | |
1317 | * LR and/or the saved LR value in the bottommost | |
1318 | * stack frame are valid. | |
1319 | */ | |
1320 | if ((pc | lr) != 0) { | |
1321 | unsigned long fnstart, fnend; | |
1322 | unsigned long nextip; | |
1323 | int printip = 1; | |
1324 | ||
1325 | get_function_bounds(pc, &fnstart, &fnend); | |
1326 | nextip = 0; | |
1327 | if (newsp > sp) | |
f78541dc | 1328 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1329 | sizeof(unsigned long)); |
1330 | if (lr == ip) { | |
1331 | if (lr < PAGE_OFFSET | |
1332 | || (fnstart <= lr && lr < fnend)) | |
1333 | printip = 0; | |
1334 | } else if (lr == nextip) { | |
1335 | printip = 0; | |
1336 | } else if (lr >= PAGE_OFFSET | |
1337 | && !(fnstart <= lr && lr < fnend)) { | |
1338 | printf("[link register ] "); | |
1339 | xmon_print_symbol(lr, " ", "\n"); | |
1340 | } | |
1341 | if (printip) { | |
f78541dc | 1342 | printf("["REG"] ", sp); |
1da177e4 LT |
1343 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1344 | } | |
1345 | pc = lr = 0; | |
1346 | ||
1347 | } else { | |
f78541dc | 1348 | printf("["REG"] ", sp); |
1da177e4 LT |
1349 | xmon_print_symbol(ip, " ", "\n"); |
1350 | } | |
1351 | ||
1352 | /* Look for "regshere" marker to see if this is | |
1353 | an exception frame. */ | |
f78541dc | 1354 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
ec2b36b9 | 1355 | && marker == STACK_FRAME_REGS_MARKER) { |
f78541dc | 1356 | if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) |
1da177e4 LT |
1357 | != sizeof(regs)) { |
1358 | printf("Couldn't read registers at %lx\n", | |
f78541dc | 1359 | sp + REGS_OFFSET); |
1da177e4 LT |
1360 | break; |
1361 | } | |
1362 | printf("--- Exception: %lx %s at ", regs.trap, | |
1363 | getvecname(TRAP(®s))); | |
1364 | pc = regs.nip; | |
1365 | lr = regs.link; | |
1366 | xmon_print_symbol(pc, " ", "\n"); | |
1367 | } | |
1368 | ||
1369 | if (newsp == 0) | |
1370 | break; | |
1371 | ||
1372 | sp = newsp; | |
1373 | } while (count++ < xmon_depth_to_print); | |
1374 | } | |
1375 | ||
1376 | static void backtrace(struct pt_regs *excp) | |
1377 | { | |
1378 | unsigned long sp; | |
1379 | ||
1380 | if (scanhex(&sp)) | |
1381 | xmon_show_stack(sp, 0, 0); | |
1382 | else | |
1383 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1384 | scannl(); | |
1385 | } | |
1386 | ||
1387 | static void print_bug_trap(struct pt_regs *regs) | |
1388 | { | |
ebdba9af | 1389 | #ifdef CONFIG_BUG |
73c9ceab | 1390 | const struct bug_entry *bug; |
1da177e4 LT |
1391 | unsigned long addr; |
1392 | ||
1393 | if (regs->msr & MSR_PR) | |
1394 | return; /* not in kernel */ | |
1395 | addr = regs->nip; /* address of trap instruction */ | |
1396 | if (addr < PAGE_OFFSET) | |
1397 | return; | |
1398 | bug = find_bug(regs->nip); | |
1399 | if (bug == NULL) | |
1400 | return; | |
73c9ceab | 1401 | if (is_warning_bug(bug)) |
1da177e4 LT |
1402 | return; |
1403 | ||
0a7c7efc | 1404 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
73c9ceab JF |
1405 | printf("kernel BUG at %s:%u!\n", |
1406 | bug->file, bug->line); | |
0a7c7efc SR |
1407 | #else |
1408 | printf("kernel BUG at %p!\n", (void *)bug->bug_addr); | |
1409 | #endif | |
ebdba9af | 1410 | #endif /* CONFIG_BUG */ |
1da177e4 LT |
1411 | } |
1412 | ||
9f1067c2 | 1413 | static void excprint(struct pt_regs *fp) |
1da177e4 LT |
1414 | { |
1415 | unsigned long trap; | |
1416 | ||
1417 | #ifdef CONFIG_SMP | |
1418 | printf("cpu 0x%x: ", smp_processor_id()); | |
1419 | #endif /* CONFIG_SMP */ | |
1420 | ||
1421 | trap = TRAP(fp); | |
1422 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1423 | printf(" pc: "); | |
1424 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1425 | ||
1426 | printf(" lr: ", fp->link); | |
1427 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1428 | ||
1429 | printf(" sp: %lx\n", fp->gpr[1]); | |
1430 | printf(" msr: %lx\n", fp->msr); | |
1431 | ||
1432 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { | |
1433 | printf(" dar: %lx\n", fp->dar); | |
1434 | if (trap != 0x380) | |
1435 | printf(" dsisr: %lx\n", fp->dsisr); | |
1436 | } | |
1437 | ||
1438 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1439 | #ifdef CONFIG_PPC64 |
7ac21cd4 BH |
1440 | printf(" paca = 0x%lx\t softe: %d\t harde: %d\n", |
1441 | local_paca, local_paca->soft_enabled, local_paca->hard_enabled); | |
f78541dc | 1442 | #endif |
1da177e4 LT |
1443 | if (current) { |
1444 | printf(" pid = %ld, comm = %s\n", | |
1445 | current->pid, current->comm); | |
1446 | } | |
1447 | ||
1448 | if (trap == 0x700) | |
1449 | print_bug_trap(fp); | |
1450 | } | |
1451 | ||
9f1067c2 | 1452 | static void prregs(struct pt_regs *fp) |
1da177e4 | 1453 | { |
f78541dc | 1454 | int n, trap; |
1da177e4 LT |
1455 | unsigned long base; |
1456 | struct pt_regs regs; | |
1457 | ||
1458 | if (scanhex(&base)) { | |
1459 | if (setjmp(bus_error_jmp) == 0) { | |
1460 | catch_memory_errors = 1; | |
1461 | sync(); | |
1462 | regs = *(struct pt_regs *)base; | |
1463 | sync(); | |
1464 | __delay(200); | |
1465 | } else { | |
1466 | catch_memory_errors = 0; | |
f78541dc | 1467 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1468 | base); |
1469 | return; | |
1470 | } | |
1471 | catch_memory_errors = 0; | |
1472 | fp = ®s; | |
1473 | } | |
1474 | ||
f78541dc | 1475 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1476 | if (FULL_REGS(fp)) { |
1477 | for (n = 0; n < 16; ++n) | |
f78541dc | 1478 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1479 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1480 | } else { | |
1481 | for (n = 0; n < 7; ++n) | |
f78541dc | 1482 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1483 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1484 | } | |
f78541dc PM |
1485 | #else |
1486 | for (n = 0; n < 32; ++n) { | |
1487 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1488 | (n & 3) == 3? "\n": " "); | |
1489 | if (n == 12 && !FULL_REGS(fp)) { | |
1490 | printf("\n"); | |
1491 | break; | |
1492 | } | |
1493 | } | |
1494 | #endif | |
1da177e4 LT |
1495 | printf("pc = "); |
1496 | xmon_print_symbol(fp->nip, " ", "\n"); | |
48404f2e PM |
1497 | if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
1498 | printf("cfar= "); | |
1499 | xmon_print_symbol(fp->orig_gpr3, " ", "\n"); | |
1500 | } | |
1da177e4 LT |
1501 | printf("lr = "); |
1502 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1503 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1504 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1505 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1506 | trap = TRAP(fp); |
1507 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1508 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1509 | } |
1510 | ||
9f1067c2 | 1511 | static void cacheflush(void) |
1da177e4 LT |
1512 | { |
1513 | int cmd; | |
1514 | unsigned long nflush; | |
1515 | ||
1516 | cmd = inchar(); | |
1517 | if (cmd != 'i') | |
1518 | termch = cmd; | |
1519 | scanhex((void *)&adrs); | |
1520 | if (termch != '\n') | |
1521 | termch = 0; | |
1522 | nflush = 1; | |
1523 | scanhex(&nflush); | |
1524 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1525 | if (setjmp(bus_error_jmp) == 0) { | |
1526 | catch_memory_errors = 1; | |
1527 | sync(); | |
1528 | ||
1529 | if (cmd != 'i') { | |
1530 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1531 | cflush((void *) adrs); | |
1532 | } else { | |
1533 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1534 | cinval((void *) adrs); | |
1535 | } | |
1536 | sync(); | |
1537 | /* wait a little while to see if we get a machine check */ | |
1538 | __delay(200); | |
1539 | } | |
1540 | catch_memory_errors = 0; | |
1541 | } | |
1542 | ||
9f1067c2 | 1543 | static unsigned long |
1da177e4 LT |
1544 | read_spr(int n) |
1545 | { | |
1546 | unsigned int instrs[2]; | |
1547 | unsigned long (*code)(void); | |
1da177e4 | 1548 | unsigned long ret = -1UL; |
548ccebc PM |
1549 | #ifdef CONFIG_PPC64 |
1550 | unsigned long opd[3]; | |
1da177e4 | 1551 | |
1da177e4 LT |
1552 | opd[0] = (unsigned long)instrs; |
1553 | opd[1] = 0; | |
1554 | opd[2] = 0; | |
548ccebc PM |
1555 | code = (unsigned long (*)(void)) opd; |
1556 | #else | |
1557 | code = (unsigned long (*)(void)) instrs; | |
1558 | #endif | |
1559 | ||
1560 | /* mfspr r3,n; blr */ | |
1561 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1562 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1563 | store_inst(instrs); |
1564 | store_inst(instrs+1); | |
1da177e4 LT |
1565 | |
1566 | if (setjmp(bus_error_jmp) == 0) { | |
1567 | catch_memory_errors = 1; | |
1568 | sync(); | |
1569 | ||
1570 | ret = code(); | |
1571 | ||
1572 | sync(); | |
1573 | /* wait a little while to see if we get a machine check */ | |
1574 | __delay(200); | |
1575 | n = size; | |
1576 | } | |
1577 | ||
1578 | return ret; | |
1579 | } | |
1580 | ||
9f1067c2 | 1581 | static void |
1da177e4 LT |
1582 | write_spr(int n, unsigned long val) |
1583 | { | |
1584 | unsigned int instrs[2]; | |
1585 | unsigned long (*code)(unsigned long); | |
548ccebc | 1586 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1587 | unsigned long opd[3]; |
1588 | ||
1da177e4 LT |
1589 | opd[0] = (unsigned long)instrs; |
1590 | opd[1] = 0; | |
1591 | opd[2] = 0; | |
548ccebc PM |
1592 | code = (unsigned long (*)(unsigned long)) opd; |
1593 | #else | |
1594 | code = (unsigned long (*)(unsigned long)) instrs; | |
1595 | #endif | |
1596 | ||
1597 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1598 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1599 | store_inst(instrs); |
1600 | store_inst(instrs+1); | |
1da177e4 LT |
1601 | |
1602 | if (setjmp(bus_error_jmp) == 0) { | |
1603 | catch_memory_errors = 1; | |
1604 | sync(); | |
1605 | ||
1606 | code(val); | |
1607 | ||
1608 | sync(); | |
1609 | /* wait a little while to see if we get a machine check */ | |
1610 | __delay(200); | |
1611 | n = size; | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | static unsigned long regno; | |
1616 | extern char exc_prolog; | |
1617 | extern char dec_exc; | |
1618 | ||
9f1067c2 | 1619 | static void super_regs(void) |
1da177e4 LT |
1620 | { |
1621 | int cmd; | |
1622 | unsigned long val; | |
1da177e4 LT |
1623 | |
1624 | cmd = skipbl(); | |
1625 | if (cmd == '\n') { | |
1626 | unsigned long sp, toc; | |
1627 | asm("mr %0,1" : "=r" (sp) :); | |
1628 | asm("mr %0,2" : "=r" (toc) :); | |
1629 | ||
f78541dc PM |
1630 | printf("msr = "REG" sprg0= "REG"\n", |
1631 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1632 | printf("pvr = "REG" sprg1= "REG"\n", | |
1633 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); | |
1634 | printf("dec = "REG" sprg2= "REG"\n", | |
1635 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1636 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1637 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 | 1638 | #ifdef CONFIG_PPC_ISERIES |
1d13581d SR |
1639 | if (firmware_has_feature(FW_FEATURE_ISERIES)) { |
1640 | struct paca_struct *ptrPaca; | |
1641 | struct lppaca *ptrLpPaca; | |
1d13581d SR |
1642 | |
1643 | /* Dump out relevant Paca data areas. */ | |
1644 | printf("Paca: \n"); | |
7ac21cd4 | 1645 | ptrPaca = local_paca; |
1d13581d SR |
1646 | |
1647 | printf(" Local Processor Control Area (LpPaca): \n"); | |
1648 | ptrLpPaca = ptrPaca->lppaca_ptr; | |
1649 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", | |
1650 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); | |
1651 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", | |
1652 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); | |
69ddb57c GS |
1653 | printf(" Saved Gpr5=%.16lx \n", |
1654 | ptrLpPaca->gpr5_dword.saved_gpr5); | |
1d13581d | 1655 | } |
1da177e4 LT |
1656 | #endif |
1657 | ||
1658 | return; | |
1659 | } | |
1660 | ||
1661 | scanhex(®no); | |
1662 | switch (cmd) { | |
1663 | case 'w': | |
1664 | val = read_spr(regno); | |
1665 | scanhex(&val); | |
1666 | write_spr(regno, val); | |
1667 | /* fall through */ | |
1668 | case 'r': | |
1669 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1670 | break; | |
1da177e4 LT |
1671 | } |
1672 | scannl(); | |
1673 | } | |
1674 | ||
1675 | /* | |
1676 | * Stuff for reading and writing memory safely | |
1677 | */ | |
9f1067c2 | 1678 | static int |
1da177e4 LT |
1679 | mread(unsigned long adrs, void *buf, int size) |
1680 | { | |
1681 | volatile int n; | |
1682 | char *p, *q; | |
1683 | ||
1684 | n = 0; | |
1685 | if (setjmp(bus_error_jmp) == 0) { | |
1686 | catch_memory_errors = 1; | |
1687 | sync(); | |
1688 | p = (char *)adrs; | |
1689 | q = (char *)buf; | |
1690 | switch (size) { | |
1691 | case 2: | |
f78541dc | 1692 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1693 | break; |
1694 | case 4: | |
f78541dc | 1695 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1696 | break; |
1697 | case 8: | |
f78541dc | 1698 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1699 | break; |
1700 | default: | |
1701 | for( ; n < size; ++n) { | |
1702 | *q++ = *p++; | |
1703 | sync(); | |
1704 | } | |
1705 | } | |
1706 | sync(); | |
1707 | /* wait a little while to see if we get a machine check */ | |
1708 | __delay(200); | |
1709 | n = size; | |
1710 | } | |
1711 | catch_memory_errors = 0; | |
1712 | return n; | |
1713 | } | |
1714 | ||
9f1067c2 | 1715 | static int |
1da177e4 LT |
1716 | mwrite(unsigned long adrs, void *buf, int size) |
1717 | { | |
1718 | volatile int n; | |
1719 | char *p, *q; | |
1720 | ||
1721 | n = 0; | |
1722 | if (setjmp(bus_error_jmp) == 0) { | |
1723 | catch_memory_errors = 1; | |
1724 | sync(); | |
1725 | p = (char *) adrs; | |
1726 | q = (char *) buf; | |
1727 | switch (size) { | |
1728 | case 2: | |
f78541dc | 1729 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1730 | break; |
1731 | case 4: | |
f78541dc | 1732 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1733 | break; |
1734 | case 8: | |
f78541dc | 1735 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1736 | break; |
1737 | default: | |
1738 | for ( ; n < size; ++n) { | |
1739 | *p++ = *q++; | |
1740 | sync(); | |
1741 | } | |
1742 | } | |
1743 | sync(); | |
1744 | /* wait a little while to see if we get a machine check */ | |
1745 | __delay(200); | |
1746 | n = size; | |
1747 | } else { | |
1748 | printf("*** Error writing address %x\n", adrs + n); | |
1749 | } | |
1750 | catch_memory_errors = 0; | |
1751 | return n; | |
1752 | } | |
1753 | ||
1754 | static int fault_type; | |
f78541dc | 1755 | static int fault_except; |
1da177e4 LT |
1756 | static char *fault_chars[] = { "--", "**", "##" }; |
1757 | ||
f78541dc | 1758 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1759 | { |
f78541dc | 1760 | fault_except = TRAP(regs); |
1da177e4 LT |
1761 | switch (TRAP(regs)) { |
1762 | case 0x200: | |
1763 | fault_type = 0; | |
1764 | break; | |
1765 | case 0x300: | |
1766 | case 0x380: | |
1767 | fault_type = 1; | |
1768 | break; | |
1769 | default: | |
1770 | fault_type = 2; | |
1771 | } | |
1772 | ||
1773 | longjmp(bus_error_jmp, 1); | |
1774 | ||
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1779 | ||
9f1067c2 | 1780 | static void |
1da177e4 LT |
1781 | byterev(unsigned char *val, int size) |
1782 | { | |
1783 | int t; | |
1784 | ||
1785 | switch (size) { | |
1786 | case 2: | |
1787 | SWAP(val[0], val[1], t); | |
1788 | break; | |
1789 | case 4: | |
1790 | SWAP(val[0], val[3], t); | |
1791 | SWAP(val[1], val[2], t); | |
1792 | break; | |
1793 | case 8: /* is there really any use for this? */ | |
1794 | SWAP(val[0], val[7], t); | |
1795 | SWAP(val[1], val[6], t); | |
1796 | SWAP(val[2], val[5], t); | |
1797 | SWAP(val[3], val[4], t); | |
1798 | break; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | static int brev; | |
1803 | static int mnoread; | |
1804 | ||
1805 | static char *memex_help_string = | |
1806 | "Memory examine command usage:\n" | |
1807 | "m [addr] [flags] examine/change memory\n" | |
1808 | " addr is optional. will start where left off.\n" | |
1809 | " flags may include chars from this set:\n" | |
1810 | " b modify by bytes (default)\n" | |
1811 | " w modify by words (2 byte)\n" | |
1812 | " l modify by longs (4 byte)\n" | |
1813 | " d modify by doubleword (8 byte)\n" | |
1814 | " r toggle reverse byte order mode\n" | |
1815 | " n do not read memory (for i/o spaces)\n" | |
1816 | " . ok to read (default)\n" | |
1817 | "NOTE: flags are saved as defaults\n" | |
1818 | ""; | |
1819 | ||
1820 | static char *memex_subcmd_help_string = | |
1821 | "Memory examine subcommands:\n" | |
1822 | " hexval write this val to current location\n" | |
1823 | " 'string' write chars from string to this location\n" | |
1824 | " ' increment address\n" | |
1825 | " ^ decrement address\n" | |
1826 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1827 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1828 | " ` clear no-read flag\n" | |
1829 | " ; stay at this addr\n" | |
1830 | " v change to byte mode\n" | |
1831 | " w change to word (2 byte) mode\n" | |
1832 | " l change to long (4 byte) mode\n" | |
1833 | " u change to doubleword (8 byte) mode\n" | |
1834 | " m addr change current addr\n" | |
1835 | " n toggle no-read flag\n" | |
1836 | " r toggle byte reverse flag\n" | |
1837 | " < count back up count bytes\n" | |
1838 | " > count skip forward count bytes\n" | |
1839 | " x exit this mode\n" | |
1840 | ""; | |
1841 | ||
9f1067c2 | 1842 | static void |
1da177e4 LT |
1843 | memex(void) |
1844 | { | |
1845 | int cmd, inc, i, nslash; | |
1846 | unsigned long n; | |
1847 | unsigned char val[16]; | |
1848 | ||
1849 | scanhex((void *)&adrs); | |
1850 | cmd = skipbl(); | |
1851 | if (cmd == '?') { | |
1852 | printf(memex_help_string); | |
1853 | return; | |
1854 | } else { | |
1855 | termch = cmd; | |
1856 | } | |
1857 | last_cmd = "m\n"; | |
1858 | while ((cmd = skipbl()) != '\n') { | |
1859 | switch( cmd ){ | |
1860 | case 'b': size = 1; break; | |
1861 | case 'w': size = 2; break; | |
1862 | case 'l': size = 4; break; | |
1863 | case 'd': size = 8; break; | |
1864 | case 'r': brev = !brev; break; | |
1865 | case 'n': mnoread = 1; break; | |
1866 | case '.': mnoread = 0; break; | |
1867 | } | |
1868 | } | |
1869 | if( size <= 0 ) | |
1870 | size = 1; | |
1871 | else if( size > 8 ) | |
1872 | size = 8; | |
1873 | for(;;){ | |
1874 | if (!mnoread) | |
1875 | n = mread(adrs, val, size); | |
e1449ed9 | 1876 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1877 | if (!mnoread) { |
1878 | if (brev) | |
1879 | byterev(val, size); | |
1880 | putchar(' '); | |
1881 | for (i = 0; i < n; ++i) | |
1882 | printf("%.2x", val[i]); | |
1883 | for (; i < size; ++i) | |
1884 | printf("%s", fault_chars[fault_type]); | |
1885 | } | |
1886 | putchar(' '); | |
1887 | inc = size; | |
1888 | nslash = 0; | |
1889 | for(;;){ | |
1890 | if( scanhex(&n) ){ | |
1891 | for (i = 0; i < size; ++i) | |
1892 | val[i] = n >> (i * 8); | |
1893 | if (!brev) | |
1894 | byterev(val, size); | |
1895 | mwrite(adrs, val, size); | |
1896 | inc = size; | |
1897 | } | |
1898 | cmd = skipbl(); | |
1899 | if (cmd == '\n') | |
1900 | break; | |
1901 | inc = 0; | |
1902 | switch (cmd) { | |
1903 | case '\'': | |
1904 | for(;;){ | |
1905 | n = inchar(); | |
1906 | if( n == '\\' ) | |
1907 | n = bsesc(); | |
1908 | else if( n == '\'' ) | |
1909 | break; | |
1910 | for (i = 0; i < size; ++i) | |
1911 | val[i] = n >> (i * 8); | |
1912 | if (!brev) | |
1913 | byterev(val, size); | |
1914 | mwrite(adrs, val, size); | |
1915 | adrs += size; | |
1916 | } | |
1917 | adrs -= size; | |
1918 | inc = size; | |
1919 | break; | |
1920 | case ',': | |
1921 | adrs += size; | |
1922 | break; | |
1923 | case '.': | |
1924 | mnoread = 0; | |
1925 | break; | |
1926 | case ';': | |
1927 | break; | |
1928 | case 'x': | |
1929 | case EOF: | |
1930 | scannl(); | |
1931 | return; | |
1932 | case 'b': | |
1933 | case 'v': | |
1934 | size = 1; | |
1935 | break; | |
1936 | case 'w': | |
1937 | size = 2; | |
1938 | break; | |
1939 | case 'l': | |
1940 | size = 4; | |
1941 | break; | |
1942 | case 'u': | |
1943 | size = 8; | |
1944 | break; | |
1945 | case '^': | |
1946 | adrs -= size; | |
1947 | break; | |
1948 | break; | |
1949 | case '/': | |
1950 | if (nslash > 0) | |
1951 | adrs -= 1 << nslash; | |
1952 | else | |
1953 | nslash = 0; | |
1954 | nslash += 4; | |
1955 | adrs += 1 << nslash; | |
1956 | break; | |
1957 | case '\\': | |
1958 | if (nslash < 0) | |
1959 | adrs += 1 << -nslash; | |
1960 | else | |
1961 | nslash = 0; | |
1962 | nslash -= 4; | |
1963 | adrs -= 1 << -nslash; | |
1964 | break; | |
1965 | case 'm': | |
1966 | scanhex((void *)&adrs); | |
1967 | break; | |
1968 | case 'n': | |
1969 | mnoread = 1; | |
1970 | break; | |
1971 | case 'r': | |
1972 | brev = !brev; | |
1973 | break; | |
1974 | case '<': | |
1975 | n = size; | |
1976 | scanhex(&n); | |
1977 | adrs -= n; | |
1978 | break; | |
1979 | case '>': | |
1980 | n = size; | |
1981 | scanhex(&n); | |
1982 | adrs += n; | |
1983 | break; | |
1984 | case '?': | |
1985 | printf(memex_subcmd_help_string); | |
1986 | break; | |
1987 | } | |
1988 | } | |
1989 | adrs += inc; | |
1990 | } | |
1991 | } | |
1992 | ||
9f1067c2 | 1993 | static int |
1da177e4 LT |
1994 | bsesc(void) |
1995 | { | |
1996 | int c; | |
1997 | ||
1998 | c = inchar(); | |
1999 | switch( c ){ | |
2000 | case 'n': c = '\n'; break; | |
2001 | case 'r': c = '\r'; break; | |
2002 | case 'b': c = '\b'; break; | |
2003 | case 't': c = '\t'; break; | |
2004 | } | |
2005 | return c; | |
2006 | } | |
2007 | ||
7e5b5938 OH |
2008 | static void xmon_rawdump (unsigned long adrs, long ndump) |
2009 | { | |
2010 | long n, m, r, nr; | |
2011 | unsigned char temp[16]; | |
2012 | ||
2013 | for (n = ndump; n > 0;) { | |
2014 | r = n < 16? n: 16; | |
2015 | nr = mread(adrs, temp, r); | |
2016 | adrs += nr; | |
2017 | for (m = 0; m < r; ++m) { | |
2018 | if (m < nr) | |
2019 | printf("%.2x", temp[m]); | |
2020 | else | |
2021 | printf("%s", fault_chars[fault_type]); | |
2022 | } | |
2023 | n -= r; | |
2024 | if (nr < r) | |
2025 | break; | |
2026 | } | |
2027 | printf("\n"); | |
2028 | } | |
2029 | ||
1da177e4 LT |
2030 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
2031 | || ('a' <= (c) && (c) <= 'f') \ | |
2032 | || ('A' <= (c) && (c) <= 'F')) | |
9f1067c2 | 2033 | static void |
1da177e4 LT |
2034 | dump(void) |
2035 | { | |
2036 | int c; | |
2037 | ||
2038 | c = inchar(); | |
2039 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') | |
2040 | termch = c; | |
2041 | scanhex((void *)&adrs); | |
2042 | if (termch != '\n') | |
2043 | termch = 0; | |
2044 | if (c == 'i') { | |
2045 | scanhex(&nidump); | |
2046 | if (nidump == 0) | |
2047 | nidump = 16; | |
2048 | else if (nidump > MAX_DUMP) | |
2049 | nidump = MAX_DUMP; | |
2050 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
2051 | last_cmd = "di\n"; | |
f312deb4 VS |
2052 | } else if (c == 'l') { |
2053 | dump_log_buf(); | |
7e5b5938 OH |
2054 | } else if (c == 'r') { |
2055 | scanhex(&ndump); | |
2056 | if (ndump == 0) | |
2057 | ndump = 64; | |
2058 | xmon_rawdump(adrs, ndump); | |
2059 | adrs += ndump; | |
2060 | last_cmd = "dr\n"; | |
1da177e4 LT |
2061 | } else { |
2062 | scanhex(&ndump); | |
2063 | if (ndump == 0) | |
2064 | ndump = 64; | |
2065 | else if (ndump > MAX_DUMP) | |
2066 | ndump = MAX_DUMP; | |
2067 | prdump(adrs, ndump); | |
2068 | adrs += ndump; | |
2069 | last_cmd = "d\n"; | |
2070 | } | |
2071 | } | |
2072 | ||
9f1067c2 | 2073 | static void |
1da177e4 LT |
2074 | prdump(unsigned long adrs, long ndump) |
2075 | { | |
2076 | long n, m, c, r, nr; | |
2077 | unsigned char temp[16]; | |
2078 | ||
2079 | for (n = ndump; n > 0;) { | |
f78541dc | 2080 | printf(REG, adrs); |
1da177e4 LT |
2081 | putchar(' '); |
2082 | r = n < 16? n: 16; | |
2083 | nr = mread(adrs, temp, r); | |
2084 | adrs += nr; | |
2085 | for (m = 0; m < r; ++m) { | |
e1449ed9 PM |
2086 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
2087 | putchar(' '); | |
1da177e4 LT |
2088 | if (m < nr) |
2089 | printf("%.2x", temp[m]); | |
2090 | else | |
2091 | printf("%s", fault_chars[fault_type]); | |
2092 | } | |
e1449ed9 PM |
2093 | for (; m < 16; ++m) { |
2094 | if ((m & (sizeof(long) - 1)) == 0) | |
2095 | putchar(' '); | |
1da177e4 | 2096 | printf(" "); |
e1449ed9 | 2097 | } |
1da177e4 LT |
2098 | printf(" |"); |
2099 | for (m = 0; m < r; ++m) { | |
2100 | if (m < nr) { | |
2101 | c = temp[m]; | |
2102 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2103 | } else | |
2104 | putchar(' '); | |
2105 | } | |
2106 | n -= r; | |
2107 | for (; m < 16; ++m) | |
2108 | putchar(' '); | |
2109 | printf("|\n"); | |
2110 | if (nr < r) | |
2111 | break; | |
2112 | } | |
2113 | } | |
2114 | ||
4c4c8723 ME |
2115 | typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
2116 | ||
9f1067c2 | 2117 | static int |
4c4c8723 ME |
2118 | generic_inst_dump(unsigned long adr, long count, int praddr, |
2119 | instruction_dump_func dump_func) | |
1da177e4 LT |
2120 | { |
2121 | int nr, dotted; | |
2122 | unsigned long first_adr; | |
2123 | unsigned long inst, last_inst = 0; | |
2124 | unsigned char val[4]; | |
2125 | ||
2126 | dotted = 0; | |
2127 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2128 | nr = mread(adr, val, 4); | |
2129 | if (nr == 0) { | |
2130 | if (praddr) { | |
2131 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2132 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2133 | } |
2134 | break; | |
2135 | } | |
2136 | inst = GETWORD(val); | |
2137 | if (adr > first_adr && inst == last_inst) { | |
2138 | if (!dotted) { | |
2139 | printf(" ...\n"); | |
2140 | dotted = 1; | |
2141 | } | |
2142 | continue; | |
2143 | } | |
2144 | dotted = 0; | |
2145 | last_inst = inst; | |
2146 | if (praddr) | |
f78541dc | 2147 | printf(REG" %.8x", adr, inst); |
1da177e4 | 2148 | printf("\t"); |
4c4c8723 | 2149 | dump_func(inst, adr); |
1da177e4 LT |
2150 | printf("\n"); |
2151 | } | |
2152 | return adr - first_adr; | |
2153 | } | |
2154 | ||
9f1067c2 | 2155 | static int |
4c4c8723 ME |
2156 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
2157 | { | |
2158 | return generic_inst_dump(adr, count, praddr, print_insn_powerpc); | |
2159 | } | |
2160 | ||
1da177e4 LT |
2161 | void |
2162 | print_address(unsigned long addr) | |
2163 | { | |
2164 | xmon_print_symbol(addr, "\t# ", ""); | |
2165 | } | |
2166 | ||
f312deb4 VS |
2167 | void |
2168 | dump_log_buf(void) | |
2169 | { | |
2170 | const unsigned long size = 128; | |
6d1386d5 | 2171 | unsigned long end, addr; |
f312deb4 VS |
2172 | unsigned char buf[size + 1]; |
2173 | ||
2174 | addr = 0; | |
2175 | buf[size] = '\0'; | |
2176 | ||
2177 | if (setjmp(bus_error_jmp) != 0) { | |
2178 | printf("Unable to lookup symbol __log_buf!\n"); | |
2179 | return; | |
2180 | } | |
2181 | ||
2182 | catch_memory_errors = 1; | |
2183 | sync(); | |
2184 | addr = kallsyms_lookup_name("__log_buf"); | |
2185 | ||
2186 | if (! addr) | |
2187 | printf("Symbol __log_buf not found!\n"); | |
2188 | else { | |
2189 | end = addr + (1 << CONFIG_LOG_BUF_SHIFT); | |
2190 | while (addr < end) { | |
2191 | if (! mread(addr, buf, size)) { | |
2192 | printf("Can't read memory at address 0x%lx\n", addr); | |
2193 | break; | |
2194 | } | |
2195 | ||
2196 | printf("%s", buf); | |
2197 | ||
2198 | if (strlen(buf) < size) | |
2199 | break; | |
2200 | ||
2201 | addr += size; | |
2202 | } | |
2203 | } | |
2204 | ||
2205 | sync(); | |
2206 | /* wait a little while to see if we get a machine check */ | |
2207 | __delay(200); | |
2208 | catch_memory_errors = 0; | |
2209 | } | |
1da177e4 LT |
2210 | |
2211 | /* | |
2212 | * Memory operations - move, set, print differences | |
2213 | */ | |
2214 | static unsigned long mdest; /* destination address */ | |
2215 | static unsigned long msrc; /* source address */ | |
2216 | static unsigned long mval; /* byte value to set memory to */ | |
2217 | static unsigned long mcount; /* # bytes to affect */ | |
2218 | static unsigned long mdiffs; /* max # differences to print */ | |
2219 | ||
9f1067c2 | 2220 | static void |
1da177e4 LT |
2221 | memops(int cmd) |
2222 | { | |
2223 | scanhex((void *)&mdest); | |
2224 | if( termch != '\n' ) | |
2225 | termch = 0; | |
2226 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2227 | if( termch != '\n' ) | |
2228 | termch = 0; | |
2229 | scanhex((void *)&mcount); | |
2230 | switch( cmd ){ | |
2231 | case 'm': | |
2232 | memmove((void *)mdest, (void *)msrc, mcount); | |
2233 | break; | |
2234 | case 's': | |
2235 | memset((void *)mdest, mval, mcount); | |
2236 | break; | |
2237 | case 'd': | |
2238 | if( termch != '\n' ) | |
2239 | termch = 0; | |
2240 | scanhex((void *)&mdiffs); | |
2241 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2242 | break; | |
2243 | } | |
2244 | } | |
2245 | ||
9f1067c2 | 2246 | static void |
1da177e4 LT |
2247 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
2248 | { | |
2249 | unsigned n, prt; | |
2250 | ||
2251 | prt = 0; | |
2252 | for( n = nb; n > 0; --n ) | |
2253 | if( *p1++ != *p2++ ) | |
2254 | if( ++prt <= maxpr ) | |
2255 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2256 | p1[-1], p2 - 1, p2[-1]); | |
2257 | if( prt > maxpr ) | |
2258 | printf("Total of %d differences\n", prt); | |
2259 | } | |
2260 | ||
2261 | static unsigned mend; | |
2262 | static unsigned mask; | |
2263 | ||
9f1067c2 | 2264 | static void |
1da177e4 LT |
2265 | memlocate(void) |
2266 | { | |
2267 | unsigned a, n; | |
2268 | unsigned char val[4]; | |
2269 | ||
2270 | last_cmd = "ml"; | |
2271 | scanhex((void *)&mdest); | |
2272 | if (termch != '\n') { | |
2273 | termch = 0; | |
2274 | scanhex((void *)&mend); | |
2275 | if (termch != '\n') { | |
2276 | termch = 0; | |
2277 | scanhex((void *)&mval); | |
2278 | mask = ~0; | |
2279 | if (termch != '\n') termch = 0; | |
2280 | scanhex((void *)&mask); | |
2281 | } | |
2282 | } | |
2283 | n = 0; | |
2284 | for (a = mdest; a < mend; a += 4) { | |
2285 | if (mread(a, val, 4) == 4 | |
2286 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2287 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2288 | if (++n >= 10) | |
2289 | break; | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | static unsigned long mskip = 0x1000; | |
2295 | static unsigned long mlim = 0xffffffff; | |
2296 | ||
9f1067c2 | 2297 | static void |
1da177e4 LT |
2298 | memzcan(void) |
2299 | { | |
2300 | unsigned char v; | |
2301 | unsigned a; | |
2302 | int ok, ook; | |
2303 | ||
2304 | scanhex(&mdest); | |
2305 | if (termch != '\n') termch = 0; | |
2306 | scanhex(&mskip); | |
2307 | if (termch != '\n') termch = 0; | |
2308 | scanhex(&mlim); | |
2309 | ook = 0; | |
2310 | for (a = mdest; a < mlim; a += mskip) { | |
2311 | ok = mread(a, &v, 1); | |
2312 | if (ok && !ook) { | |
2313 | printf("%.8x .. ", a); | |
1da177e4 LT |
2314 | } else if (!ok && ook) |
2315 | printf("%.8x\n", a - mskip); | |
2316 | ook = ok; | |
2317 | if (a + mskip < a) | |
2318 | break; | |
2319 | } | |
2320 | if (ook) | |
2321 | printf("%.8x\n", a - mskip); | |
2322 | } | |
2323 | ||
9f1067c2 | 2324 | static void proccall(void) |
f78541dc PM |
2325 | { |
2326 | unsigned long args[8]; | |
2327 | unsigned long ret; | |
2328 | int i; | |
2329 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2330 | unsigned long, unsigned long, unsigned long, | |
2331 | unsigned long, unsigned long, unsigned long); | |
2332 | callfunc_t func; | |
2333 | ||
2334 | if (!scanhex(&adrs)) | |
2335 | return; | |
2336 | if (termch != '\n') | |
2337 | termch = 0; | |
2338 | for (i = 0; i < 8; ++i) | |
2339 | args[i] = 0; | |
2340 | for (i = 0; i < 8; ++i) { | |
2341 | if (!scanhex(&args[i]) || termch == '\n') | |
2342 | break; | |
2343 | termch = 0; | |
2344 | } | |
2345 | func = (callfunc_t) adrs; | |
2346 | ret = 0; | |
2347 | if (setjmp(bus_error_jmp) == 0) { | |
2348 | catch_memory_errors = 1; | |
2349 | sync(); | |
2350 | ret = func(args[0], args[1], args[2], args[3], | |
2351 | args[4], args[5], args[6], args[7]); | |
2352 | sync(); | |
2353 | printf("return value is %x\n", ret); | |
2354 | } else { | |
2355 | printf("*** %x exception occurred\n", fault_except); | |
2356 | } | |
2357 | catch_memory_errors = 0; | |
2358 | } | |
2359 | ||
1da177e4 LT |
2360 | /* Input scanning routines */ |
2361 | int | |
2362 | skipbl(void) | |
2363 | { | |
2364 | int c; | |
2365 | ||
2366 | if( termch != 0 ){ | |
2367 | c = termch; | |
2368 | termch = 0; | |
2369 | } else | |
2370 | c = inchar(); | |
2371 | while( c == ' ' || c == '\t' ) | |
2372 | c = inchar(); | |
2373 | return c; | |
2374 | } | |
2375 | ||
2376 | #define N_PTREGS 44 | |
2377 | static char *regnames[N_PTREGS] = { | |
2378 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2379 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2380 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2381 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2382 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2383 | #ifdef CONFIG_PPC64 | |
2384 | "softe", | |
2385 | #else | |
2386 | "mq", | |
2387 | #endif | |
1da177e4 LT |
2388 | "trap", "dar", "dsisr", "res" |
2389 | }; | |
2390 | ||
2391 | int | |
2392 | scanhex(unsigned long *vp) | |
2393 | { | |
2394 | int c, d; | |
2395 | unsigned long v; | |
2396 | ||
2397 | c = skipbl(); | |
2398 | if (c == '%') { | |
2399 | /* parse register name */ | |
2400 | char regname[8]; | |
2401 | int i; | |
2402 | ||
2403 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2404 | c = inchar(); | |
2405 | if (!isalnum(c)) { | |
2406 | termch = c; | |
2407 | break; | |
2408 | } | |
2409 | regname[i] = c; | |
2410 | } | |
2411 | regname[i] = 0; | |
2412 | for (i = 0; i < N_PTREGS; ++i) { | |
2413 | if (strcmp(regnames[i], regname) == 0) { | |
2414 | if (xmon_regs == NULL) { | |
2415 | printf("regs not available\n"); | |
2416 | return 0; | |
2417 | } | |
2418 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2419 | return 1; | |
2420 | } | |
2421 | } | |
2422 | printf("invalid register name '%%%s'\n", regname); | |
2423 | return 0; | |
2424 | } | |
2425 | ||
2426 | /* skip leading "0x" if any */ | |
2427 | ||
2428 | if (c == '0') { | |
2429 | c = inchar(); | |
2430 | if (c == 'x') { | |
2431 | c = inchar(); | |
2432 | } else { | |
2433 | d = hexdigit(c); | |
2434 | if (d == EOF) { | |
2435 | termch = c; | |
2436 | *vp = 0; | |
2437 | return 1; | |
2438 | } | |
2439 | } | |
2440 | } else if (c == '$') { | |
2441 | int i; | |
2442 | for (i=0; i<63; i++) { | |
2443 | c = inchar(); | |
2444 | if (isspace(c)) { | |
2445 | termch = c; | |
2446 | break; | |
2447 | } | |
2448 | tmpstr[i] = c; | |
2449 | } | |
2450 | tmpstr[i++] = 0; | |
6879dc13 BH |
2451 | *vp = 0; |
2452 | if (setjmp(bus_error_jmp) == 0) { | |
2453 | catch_memory_errors = 1; | |
2454 | sync(); | |
2455 | *vp = kallsyms_lookup_name(tmpstr); | |
2456 | sync(); | |
2457 | } | |
2458 | catch_memory_errors = 0; | |
1da177e4 LT |
2459 | if (!(*vp)) { |
2460 | printf("unknown symbol '%s'\n", tmpstr); | |
2461 | return 0; | |
2462 | } | |
2463 | return 1; | |
2464 | } | |
2465 | ||
2466 | d = hexdigit(c); | |
2467 | if (d == EOF) { | |
2468 | termch = c; | |
2469 | return 0; | |
2470 | } | |
2471 | v = 0; | |
2472 | do { | |
2473 | v = (v << 4) + d; | |
2474 | c = inchar(); | |
2475 | d = hexdigit(c); | |
2476 | } while (d != EOF); | |
2477 | termch = c; | |
2478 | *vp = v; | |
2479 | return 1; | |
2480 | } | |
2481 | ||
9f1067c2 | 2482 | static void |
1da177e4 LT |
2483 | scannl(void) |
2484 | { | |
2485 | int c; | |
2486 | ||
2487 | c = termch; | |
2488 | termch = 0; | |
2489 | while( c != '\n' ) | |
2490 | c = inchar(); | |
2491 | } | |
2492 | ||
9f1067c2 | 2493 | static int hexdigit(int c) |
1da177e4 LT |
2494 | { |
2495 | if( '0' <= c && c <= '9' ) | |
2496 | return c - '0'; | |
2497 | if( 'A' <= c && c <= 'F' ) | |
2498 | return c - ('A' - 10); | |
2499 | if( 'a' <= c && c <= 'f' ) | |
2500 | return c - ('a' - 10); | |
2501 | return EOF; | |
2502 | } | |
2503 | ||
2504 | void | |
2505 | getstring(char *s, int size) | |
2506 | { | |
2507 | int c; | |
2508 | ||
2509 | c = skipbl(); | |
2510 | do { | |
2511 | if( size > 1 ){ | |
2512 | *s++ = c; | |
2513 | --size; | |
2514 | } | |
2515 | c = inchar(); | |
2516 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2517 | termch = c; | |
2518 | *s = 0; | |
2519 | } | |
2520 | ||
2521 | static char line[256]; | |
2522 | static char *lineptr; | |
2523 | ||
9f1067c2 | 2524 | static void |
1da177e4 LT |
2525 | flush_input(void) |
2526 | { | |
2527 | lineptr = NULL; | |
2528 | } | |
2529 | ||
9f1067c2 | 2530 | static int |
1da177e4 LT |
2531 | inchar(void) |
2532 | { | |
2533 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2534 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2535 | lineptr = NULL; |
2536 | return EOF; | |
2537 | } | |
2538 | lineptr = line; | |
2539 | } | |
2540 | return *lineptr++; | |
2541 | } | |
2542 | ||
9f1067c2 | 2543 | static void |
1da177e4 LT |
2544 | take_input(char *str) |
2545 | { | |
2546 | lineptr = str; | |
2547 | } | |
2548 | ||
2549 | ||
2550 | static void | |
2551 | symbol_lookup(void) | |
2552 | { | |
2553 | int type = inchar(); | |
2554 | unsigned long addr; | |
2555 | static char tmp[64]; | |
2556 | ||
2557 | switch (type) { | |
2558 | case 'a': | |
2559 | if (scanhex(&addr)) | |
2560 | xmon_print_symbol(addr, ": ", "\n"); | |
2561 | termch = 0; | |
2562 | break; | |
2563 | case 's': | |
2564 | getstring(tmp, 64); | |
2565 | if (setjmp(bus_error_jmp) == 0) { | |
2566 | catch_memory_errors = 1; | |
2567 | sync(); | |
2568 | addr = kallsyms_lookup_name(tmp); | |
2569 | if (addr) | |
2570 | printf("%s: %lx\n", tmp, addr); | |
2571 | else | |
2572 | printf("Symbol '%s' not found.\n", tmp); | |
2573 | sync(); | |
2574 | } | |
2575 | catch_memory_errors = 0; | |
2576 | termch = 0; | |
2577 | break; | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | ||
2582 | /* Print an address in numeric and symbolic form (if possible) */ | |
2583 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2584 | const char *after) | |
2585 | { | |
2586 | char *modname; | |
2587 | const char *name = NULL; | |
2588 | unsigned long offset, size; | |
2589 | ||
f78541dc | 2590 | printf(REG, address); |
1da177e4 LT |
2591 | if (setjmp(bus_error_jmp) == 0) { |
2592 | catch_memory_errors = 1; | |
2593 | sync(); | |
2594 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2595 | tmpstr); | |
2596 | sync(); | |
2597 | /* wait a little while to see if we get a machine check */ | |
2598 | __delay(200); | |
2599 | } | |
2600 | ||
2601 | catch_memory_errors = 0; | |
2602 | ||
2603 | if (name) { | |
2604 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2605 | if (modname) | |
2606 | printf(" [%s]", modname); | |
2607 | } | |
2608 | printf("%s", after); | |
2609 | } | |
2610 | ||
2d27cfd3 | 2611 | #ifdef CONFIG_PPC_BOOK3S_64 |
1da177e4 LT |
2612 | static void dump_slb(void) |
2613 | { | |
2614 | int i; | |
b3b9595f | 2615 | unsigned long esid,vsid,valid; |
2616 | unsigned long llp; | |
1da177e4 LT |
2617 | |
2618 | printf("SLB contents of cpu %x\n", smp_processor_id()); | |
2619 | ||
584f8b71 | 2620 | for (i = 0; i < mmu_slb_size; i++) { |
b3b9595f | 2621 | asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
2622 | asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); | |
2623 | valid = (esid & SLB_ESID_V); | |
2624 | if (valid | esid | vsid) { | |
2625 | printf("%02d %016lx %016lx", i, esid, vsid); | |
2626 | if (valid) { | |
2627 | llp = vsid & SLB_VSID_LLP; | |
2628 | if (vsid & SLB_VSID_B_1T) { | |
2629 | printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2630 | GET_ESID_1T(esid), | |
2631 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, | |
2632 | llp); | |
2633 | } else { | |
2634 | printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2635 | GET_ESID(esid), | |
2636 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, | |
2637 | llp); | |
2638 | } | |
2639 | } else | |
2640 | printf("\n"); | |
2641 | } | |
1da177e4 LT |
2642 | } |
2643 | } | |
2644 | ||
2645 | static void dump_stab(void) | |
2646 | { | |
2647 | int i; | |
7ac21cd4 | 2648 | unsigned long *tmp = (unsigned long *)local_paca->stab_addr; |
1da177e4 LT |
2649 | |
2650 | printf("Segment table contents of cpu %x\n", smp_processor_id()); | |
2651 | ||
2652 | for (i = 0; i < PAGE_SIZE/16; i++) { | |
2653 | unsigned long a, b; | |
2654 | ||
2655 | a = *tmp++; | |
2656 | b = *tmp++; | |
2657 | ||
2658 | if (a || b) { | |
2659 | printf("%03d %016lx ", i, a); | |
2660 | printf("%016lx\n", b); | |
2661 | } | |
2662 | } | |
2663 | } | |
2664 | ||
f78541dc PM |
2665 | void dump_segments(void) |
2666 | { | |
44ae3ab3 | 2667 | if (mmu_has_feature(MMU_FTR_SLB)) |
f78541dc PM |
2668 | dump_slb(); |
2669 | else | |
2670 | dump_stab(); | |
2671 | } | |
2672 | #endif | |
2673 | ||
2674 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2675 | void dump_segments(void) | |
2676 | { | |
2677 | int i; | |
2678 | ||
2679 | printf("sr0-15 ="); | |
2680 | for (i = 0; i < 16; ++i) | |
2681 | printf(" %x", mfsrin(i)); | |
2682 | printf("\n"); | |
2683 | } | |
2684 | #endif | |
2685 | ||
5a8a1a28 BH |
2686 | #ifdef CONFIG_44x |
2687 | static void dump_tlb_44x(void) | |
2688 | { | |
2689 | int i; | |
2690 | ||
2691 | for (i = 0; i < PPC44x_TLB_SIZE; i++) { | |
2692 | unsigned long w0,w1,w2; | |
2693 | asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); | |
2694 | asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); | |
2695 | asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); | |
2696 | printf("[%02x] %08x %08x %08x ", i, w0, w1, w2); | |
2697 | if (w0 & PPC44x_TLB_VALID) { | |
2698 | printf("V %08x -> %01x%08x %c%c%c%c%c", | |
2699 | w0 & PPC44x_TLB_EPN_MASK, | |
2700 | w1 & PPC44x_TLB_ERPN_MASK, | |
2701 | w1 & PPC44x_TLB_RPN_MASK, | |
2702 | (w2 & PPC44x_TLB_W) ? 'W' : 'w', | |
2703 | (w2 & PPC44x_TLB_I) ? 'I' : 'i', | |
2704 | (w2 & PPC44x_TLB_M) ? 'M' : 'm', | |
2705 | (w2 & PPC44x_TLB_G) ? 'G' : 'g', | |
2706 | (w2 & PPC44x_TLB_E) ? 'E' : 'e'); | |
2707 | } | |
2708 | printf("\n"); | |
2709 | } | |
2710 | } | |
2711 | #endif /* CONFIG_44x */ | |
9f1067c2 | 2712 | |
03247157 BH |
2713 | #ifdef CONFIG_PPC_BOOK3E |
2714 | static void dump_tlb_book3e(void) | |
2715 | { | |
2716 | u32 mmucfg, pidmask, lpidmask; | |
2717 | u64 ramask; | |
2718 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | |
2719 | int mmu_version; | |
2720 | static const char *pgsz_names[] = { | |
2721 | " 1K", | |
2722 | " 2K", | |
2723 | " 4K", | |
2724 | " 8K", | |
2725 | " 16K", | |
2726 | " 32K", | |
2727 | " 64K", | |
2728 | "128K", | |
2729 | "256K", | |
2730 | "512K", | |
2731 | " 1M", | |
2732 | " 2M", | |
2733 | " 4M", | |
2734 | " 8M", | |
2735 | " 16M", | |
2736 | " 32M", | |
2737 | " 64M", | |
2738 | "128M", | |
2739 | "256M", | |
2740 | "512M", | |
2741 | " 1G", | |
2742 | " 2G", | |
2743 | " 4G", | |
2744 | " 8G", | |
2745 | " 16G", | |
2746 | " 32G", | |
2747 | " 64G", | |
2748 | "128G", | |
2749 | "256G", | |
2750 | "512G", | |
2751 | " 1T", | |
2752 | " 2T", | |
2753 | }; | |
2754 | ||
2755 | /* Gather some infos about the MMU */ | |
2756 | mmucfg = mfspr(SPRN_MMUCFG); | |
2757 | mmu_version = (mmucfg & 3) + 1; | |
2758 | ntlbs = ((mmucfg >> 2) & 3) + 1; | |
2759 | pidsz = ((mmucfg >> 6) & 0x1f) + 1; | |
2760 | lpidsz = (mmucfg >> 24) & 0xf; | |
2761 | rasz = (mmucfg >> 16) & 0x7f; | |
2762 | if ((mmu_version > 1) && (mmucfg & 0x10000)) | |
2763 | lrat = 1; | |
2764 | printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", | |
2765 | mmu_version, ntlbs, pidsz, lpidsz, rasz); | |
2766 | pidmask = (1ul << pidsz) - 1; | |
2767 | lpidmask = (1ul << lpidsz) - 1; | |
2768 | ramask = (1ull << rasz) - 1; | |
2769 | ||
2770 | for (tlb = 0; tlb < ntlbs; tlb++) { | |
2771 | u32 tlbcfg; | |
2772 | int nent, assoc, new_cc = 1; | |
2773 | printf("TLB %d:\n------\n", tlb); | |
2774 | switch(tlb) { | |
2775 | case 0: | |
2776 | tlbcfg = mfspr(SPRN_TLB0CFG); | |
2777 | break; | |
2778 | case 1: | |
2779 | tlbcfg = mfspr(SPRN_TLB1CFG); | |
2780 | break; | |
2781 | case 2: | |
2782 | tlbcfg = mfspr(SPRN_TLB2CFG); | |
2783 | break; | |
2784 | case 3: | |
2785 | tlbcfg = mfspr(SPRN_TLB3CFG); | |
2786 | break; | |
2787 | default: | |
2788 | printf("Unsupported TLB number !\n"); | |
2789 | continue; | |
2790 | } | |
2791 | nent = tlbcfg & 0xfff; | |
2792 | assoc = (tlbcfg >> 24) & 0xff; | |
2793 | for (i = 0; i < nent; i++) { | |
2794 | u32 mas0 = MAS0_TLBSEL(tlb); | |
2795 | u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); | |
2796 | u64 mas2 = 0; | |
2797 | u64 mas7_mas3; | |
2798 | int esel = i, cc = i; | |
2799 | ||
2800 | if (assoc != 0) { | |
2801 | cc = i / assoc; | |
2802 | esel = i % assoc; | |
2803 | mas2 = cc * 0x1000; | |
2804 | } | |
2805 | ||
2806 | mas0 |= MAS0_ESEL(esel); | |
2807 | mtspr(SPRN_MAS0, mas0); | |
2808 | mtspr(SPRN_MAS1, mas1); | |
2809 | mtspr(SPRN_MAS2, mas2); | |
2810 | asm volatile("tlbre 0,0,0" : : : "memory"); | |
2811 | mas1 = mfspr(SPRN_MAS1); | |
2812 | mas2 = mfspr(SPRN_MAS2); | |
2813 | mas7_mas3 = mfspr(SPRN_MAS7_MAS3); | |
2814 | if (assoc && (i % assoc) == 0) | |
2815 | new_cc = 1; | |
2816 | if (!(mas1 & MAS1_VALID)) | |
2817 | continue; | |
2818 | if (assoc == 0) | |
2819 | printf("%04x- ", i); | |
2820 | else if (new_cc) | |
2821 | printf("%04x-%c", cc, 'A' + esel); | |
2822 | else | |
2823 | printf(" |%c", 'A' + esel); | |
2824 | new_cc = 0; | |
2825 | printf(" %016llx %04x %s %c%c AS%c", | |
2826 | mas2 & ~0x3ffull, | |
2827 | (mas1 >> 16) & 0x3fff, | |
2828 | pgsz_names[(mas1 >> 7) & 0x1f], | |
2829 | mas1 & MAS1_IND ? 'I' : ' ', | |
2830 | mas1 & MAS1_IPROT ? 'P' : ' ', | |
2831 | mas1 & MAS1_TS ? '1' : '0'); | |
2832 | printf(" %c%c%c%c%c%c%c", | |
2833 | mas2 & MAS2_X0 ? 'a' : ' ', | |
2834 | mas2 & MAS2_X1 ? 'v' : ' ', | |
2835 | mas2 & MAS2_W ? 'w' : ' ', | |
2836 | mas2 & MAS2_I ? 'i' : ' ', | |
2837 | mas2 & MAS2_M ? 'm' : ' ', | |
2838 | mas2 & MAS2_G ? 'g' : ' ', | |
2839 | mas2 & MAS2_E ? 'e' : ' '); | |
2840 | printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); | |
2841 | if (mas1 & MAS1_IND) | |
2842 | printf(" %s\n", | |
2843 | pgsz_names[(mas7_mas3 >> 1) & 0x1f]); | |
2844 | else | |
2845 | printf(" U%c%c%c S%c%c%c\n", | |
2846 | mas7_mas3 & MAS3_UX ? 'x' : ' ', | |
2847 | mas7_mas3 & MAS3_UW ? 'w' : ' ', | |
2848 | mas7_mas3 & MAS3_UR ? 'r' : ' ', | |
2849 | mas7_mas3 & MAS3_SX ? 'x' : ' ', | |
2850 | mas7_mas3 & MAS3_SW ? 'w' : ' ', | |
2851 | mas7_mas3 & MAS3_SR ? 'r' : ' '); | |
2852 | } | |
2853 | } | |
2854 | } | |
2855 | #endif /* CONFIG_PPC_BOOK3E */ | |
2856 | ||
9f1067c2 | 2857 | static void xmon_init(int enable) |
b13cfd17 | 2858 | { |
bbb68177 SR |
2859 | #ifdef CONFIG_PPC_ISERIES |
2860 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
2861 | return; | |
2862 | #endif | |
b13cfd17 OH |
2863 | if (enable) { |
2864 | __debugger = xmon; | |
2865 | __debugger_ipi = xmon_ipi; | |
2866 | __debugger_bpt = xmon_bpt; | |
2867 | __debugger_sstep = xmon_sstep; | |
2868 | __debugger_iabr_match = xmon_iabr_match; | |
2869 | __debugger_dabr_match = xmon_dabr_match; | |
2870 | __debugger_fault_handler = xmon_fault_handler; | |
2871 | } else { | |
2872 | __debugger = NULL; | |
2873 | __debugger_ipi = NULL; | |
2874 | __debugger_bpt = NULL; | |
2875 | __debugger_sstep = NULL; | |
2876 | __debugger_iabr_match = NULL; | |
2877 | __debugger_dabr_match = NULL; | |
2878 | __debugger_fault_handler = NULL; | |
2879 | } | |
fca5dcd4 | 2880 | xmon_map_scc(); |
1da177e4 | 2881 | } |
fca5dcd4 PM |
2882 | |
2883 | #ifdef CONFIG_MAGIC_SYSRQ | |
1495cc9d | 2884 | static void sysrq_handle_xmon(int key) |
fca5dcd4 PM |
2885 | { |
2886 | /* ensure xmon is enabled */ | |
2887 | xmon_init(1); | |
7d12e780 | 2888 | debugger(get_irq_regs()); |
fca5dcd4 PM |
2889 | } |
2890 | ||
1495cc9d | 2891 | static struct sysrq_key_op sysrq_xmon_op = { |
fca5dcd4 PM |
2892 | .handler = sysrq_handle_xmon, |
2893 | .help_msg = "Xmon", | |
2894 | .action_msg = "Entering xmon", | |
2895 | }; | |
2896 | ||
2897 | static int __init setup_xmon_sysrq(void) | |
2898 | { | |
bbb68177 SR |
2899 | #ifdef CONFIG_PPC_ISERIES |
2900 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
2901 | return 0; | |
2902 | #endif | |
fca5dcd4 PM |
2903 | register_sysrq_key('x', &sysrq_xmon_op); |
2904 | return 0; | |
2905 | } | |
2906 | __initcall(setup_xmon_sysrq); | |
2907 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
47679283 | 2908 | |
f5e6a280 | 2909 | static int __initdata xmon_early, xmon_off; |
47679283 ME |
2910 | |
2911 | static int __init early_parse_xmon(char *p) | |
2912 | { | |
2913 | if (!p || strncmp(p, "early", 5) == 0) { | |
2914 | /* just "xmon" is equivalent to "xmon=early" */ | |
2915 | xmon_init(1); | |
2916 | xmon_early = 1; | |
2917 | } else if (strncmp(p, "on", 2) == 0) | |
2918 | xmon_init(1); | |
2919 | else if (strncmp(p, "off", 3) == 0) | |
2920 | xmon_off = 1; | |
2921 | else if (strncmp(p, "nobt", 4) == 0) | |
2922 | xmon_no_auto_backtrace = 1; | |
2923 | else | |
2924 | return 1; | |
2925 | ||
2926 | return 0; | |
2927 | } | |
2928 | early_param("xmon", early_parse_xmon); | |
2929 | ||
2930 | void __init xmon_setup(void) | |
2931 | { | |
2932 | #ifdef CONFIG_XMON_DEFAULT | |
2933 | if (!xmon_off) | |
2934 | xmon_init(1); | |
2935 | #endif | |
2936 | if (xmon_early) | |
2937 | debugger(NULL); | |
2938 | } | |
ff8a8f25 | 2939 | |
e055595d | 2940 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 ME |
2941 | |
2942 | struct spu_info { | |
2943 | struct spu *spu; | |
2944 | u64 saved_mfc_sr1_RW; | |
2945 | u32 saved_spu_runcntl_RW; | |
24a24c85 | 2946 | unsigned long dump_addr; |
ff8a8f25 ME |
2947 | u8 stopped_ok; |
2948 | }; | |
2949 | ||
2950 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ | |
2951 | ||
2952 | static struct spu_info spu_info[XMON_NUM_SPUS]; | |
2953 | ||
2954 | void xmon_register_spus(struct list_head *list) | |
2955 | { | |
2956 | struct spu *spu; | |
2957 | ||
2958 | list_for_each_entry(spu, list, full_list) { | |
2959 | if (spu->number >= XMON_NUM_SPUS) { | |
2960 | WARN_ON(1); | |
2961 | continue; | |
2962 | } | |
2963 | ||
2964 | spu_info[spu->number].spu = spu; | |
2965 | spu_info[spu->number].stopped_ok = 0; | |
24a24c85 ME |
2966 | spu_info[spu->number].dump_addr = (unsigned long) |
2967 | spu_info[spu->number].spu->local_store; | |
ff8a8f25 ME |
2968 | } |
2969 | } | |
2970 | ||
2971 | static void stop_spus(void) | |
2972 | { | |
2973 | struct spu *spu; | |
2974 | int i; | |
2975 | u64 tmp; | |
2976 | ||
2977 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
2978 | if (!spu_info[i].spu) | |
2979 | continue; | |
2980 | ||
2981 | if (setjmp(bus_error_jmp) == 0) { | |
2982 | catch_memory_errors = 1; | |
2983 | sync(); | |
2984 | ||
2985 | spu = spu_info[i].spu; | |
2986 | ||
2987 | spu_info[i].saved_spu_runcntl_RW = | |
2988 | in_be32(&spu->problem->spu_runcntl_RW); | |
2989 | ||
2990 | tmp = spu_mfc_sr1_get(spu); | |
2991 | spu_info[i].saved_mfc_sr1_RW = tmp; | |
2992 | ||
2993 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; | |
2994 | spu_mfc_sr1_set(spu, tmp); | |
2995 | ||
2996 | sync(); | |
2997 | __delay(200); | |
2998 | ||
2999 | spu_info[i].stopped_ok = 1; | |
2a14442b ME |
3000 | |
3001 | printf("Stopped spu %.2d (was %s)\n", i, | |
3002 | spu_info[i].saved_spu_runcntl_RW ? | |
3003 | "running" : "stopped"); | |
ff8a8f25 ME |
3004 | } else { |
3005 | catch_memory_errors = 0; | |
3006 | printf("*** Error stopping spu %.2d\n", i); | |
3007 | } | |
3008 | catch_memory_errors = 0; | |
3009 | } | |
3010 | } | |
3011 | ||
3012 | static void restart_spus(void) | |
3013 | { | |
3014 | struct spu *spu; | |
3015 | int i; | |
3016 | ||
3017 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3018 | if (!spu_info[i].spu) | |
3019 | continue; | |
3020 | ||
3021 | if (!spu_info[i].stopped_ok) { | |
3022 | printf("*** Error, spu %d was not successfully stopped" | |
3023 | ", not restarting\n", i); | |
3024 | continue; | |
3025 | } | |
3026 | ||
3027 | if (setjmp(bus_error_jmp) == 0) { | |
3028 | catch_memory_errors = 1; | |
3029 | sync(); | |
3030 | ||
3031 | spu = spu_info[i].spu; | |
3032 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); | |
3033 | out_be32(&spu->problem->spu_runcntl_RW, | |
3034 | spu_info[i].saved_spu_runcntl_RW); | |
3035 | ||
3036 | sync(); | |
3037 | __delay(200); | |
3038 | ||
3039 | printf("Restarted spu %.2d\n", i); | |
3040 | } else { | |
3041 | catch_memory_errors = 0; | |
3042 | printf("*** Error restarting spu %.2d\n", i); | |
3043 | } | |
3044 | catch_memory_errors = 0; | |
3045 | } | |
3046 | } | |
3047 | ||
a8984970 | 3048 | #define DUMP_WIDTH 23 |
437a0706 | 3049 | #define DUMP_VALUE(format, field, value) \ |
a8984970 ME |
3050 | do { \ |
3051 | if (setjmp(bus_error_jmp) == 0) { \ | |
3052 | catch_memory_errors = 1; \ | |
3053 | sync(); \ | |
3054 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ | |
437a0706 | 3055 | #field, value); \ |
a8984970 ME |
3056 | sync(); \ |
3057 | __delay(200); \ | |
3058 | } else { \ | |
3059 | catch_memory_errors = 0; \ | |
3060 | printf(" %-*s = *** Error reading field.\n", \ | |
3061 | DUMP_WIDTH, #field); \ | |
3062 | } \ | |
3063 | catch_memory_errors = 0; \ | |
3064 | } while (0) | |
3065 | ||
437a0706 ME |
3066 | #define DUMP_FIELD(obj, format, field) \ |
3067 | DUMP_VALUE(format, field, obj->field) | |
3068 | ||
a8984970 ME |
3069 | static void dump_spu_fields(struct spu *spu) |
3070 | { | |
3071 | printf("Dumping spu fields at address %p:\n", spu); | |
3072 | ||
3073 | DUMP_FIELD(spu, "0x%x", number); | |
3074 | DUMP_FIELD(spu, "%s", name); | |
a8984970 ME |
3075 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
3076 | DUMP_FIELD(spu, "0x%p", local_store); | |
3077 | DUMP_FIELD(spu, "0x%lx", ls_size); | |
3078 | DUMP_FIELD(spu, "0x%x", node); | |
3079 | DUMP_FIELD(spu, "0x%lx", flags); | |
a8984970 | 3080 | DUMP_FIELD(spu, "%d", class_0_pending); |
f3d69e05 | 3081 | DUMP_FIELD(spu, "0x%lx", class_0_dar); |
f3d69e05 LB |
3082 | DUMP_FIELD(spu, "0x%lx", class_1_dar); |
3083 | DUMP_FIELD(spu, "0x%lx", class_1_dsisr); | |
a8984970 ME |
3084 | DUMP_FIELD(spu, "0x%lx", irqs[0]); |
3085 | DUMP_FIELD(spu, "0x%lx", irqs[1]); | |
3086 | DUMP_FIELD(spu, "0x%lx", irqs[2]); | |
3087 | DUMP_FIELD(spu, "0x%x", slb_replace); | |
3088 | DUMP_FIELD(spu, "%d", pid); | |
a8984970 ME |
3089 | DUMP_FIELD(spu, "0x%p", mm); |
3090 | DUMP_FIELD(spu, "0x%p", ctx); | |
3091 | DUMP_FIELD(spu, "0x%p", rq); | |
3092 | DUMP_FIELD(spu, "0x%p", timestamp); | |
3093 | DUMP_FIELD(spu, "0x%lx", problem_phys); | |
3094 | DUMP_FIELD(spu, "0x%p", problem); | |
437a0706 ME |
3095 | DUMP_VALUE("0x%x", problem->spu_runcntl_RW, |
3096 | in_be32(&spu->problem->spu_runcntl_RW)); | |
3097 | DUMP_VALUE("0x%x", problem->spu_status_R, | |
3098 | in_be32(&spu->problem->spu_status_R)); | |
3099 | DUMP_VALUE("0x%x", problem->spu_npc_RW, | |
3100 | in_be32(&spu->problem->spu_npc_RW)); | |
a8984970 | 3101 | DUMP_FIELD(spu, "0x%p", priv2); |
a985239b | 3102 | DUMP_FIELD(spu, "0x%p", pdata); |
a8984970 ME |
3103 | } |
3104 | ||
af89fb80 ME |
3105 | int |
3106 | spu_inst_dump(unsigned long adr, long count, int praddr) | |
3107 | { | |
3108 | return generic_inst_dump(adr, count, praddr, print_insn_spu); | |
3109 | } | |
3110 | ||
3111 | static void dump_spu_ls(unsigned long num, int subcmd) | |
24a24c85 ME |
3112 | { |
3113 | unsigned long offset, addr, ls_addr; | |
3114 | ||
3115 | if (setjmp(bus_error_jmp) == 0) { | |
3116 | catch_memory_errors = 1; | |
3117 | sync(); | |
3118 | ls_addr = (unsigned long)spu_info[num].spu->local_store; | |
3119 | sync(); | |
3120 | __delay(200); | |
3121 | } else { | |
3122 | catch_memory_errors = 0; | |
3123 | printf("*** Error: accessing spu info for spu %d\n", num); | |
3124 | return; | |
3125 | } | |
3126 | catch_memory_errors = 0; | |
3127 | ||
3128 | if (scanhex(&offset)) | |
3129 | addr = ls_addr + offset; | |
3130 | else | |
3131 | addr = spu_info[num].dump_addr; | |
3132 | ||
3133 | if (addr >= ls_addr + LS_SIZE) { | |
3134 | printf("*** Error: address outside of local store\n"); | |
3135 | return; | |
3136 | } | |
3137 | ||
af89fb80 ME |
3138 | switch (subcmd) { |
3139 | case 'i': | |
3140 | addr += spu_inst_dump(addr, 16, 1); | |
3141 | last_cmd = "sdi\n"; | |
3142 | break; | |
3143 | default: | |
3144 | prdump(addr, 64); | |
3145 | addr += 64; | |
3146 | last_cmd = "sd\n"; | |
3147 | break; | |
3148 | } | |
24a24c85 ME |
3149 | |
3150 | spu_info[num].dump_addr = addr; | |
3151 | } | |
3152 | ||
ff8a8f25 ME |
3153 | static int do_spu_cmd(void) |
3154 | { | |
24a24c85 | 3155 | static unsigned long num = 0; |
af89fb80 | 3156 | int cmd, subcmd = 0; |
ff8a8f25 ME |
3157 | |
3158 | cmd = inchar(); | |
3159 | switch (cmd) { | |
3160 | case 's': | |
3161 | stop_spus(); | |
3162 | break; | |
3163 | case 'r': | |
3164 | restart_spus(); | |
3165 | break; | |
24a24c85 | 3166 | case 'd': |
af89fb80 ME |
3167 | subcmd = inchar(); |
3168 | if (isxdigit(subcmd) || subcmd == '\n') | |
3169 | termch = subcmd; | |
3170 | case 'f': | |
24a24c85 ME |
3171 | scanhex(&num); |
3172 | if (num >= XMON_NUM_SPUS || !spu_info[num].spu) { | |
a8984970 | 3173 | printf("*** Error: invalid spu number\n"); |
24a24c85 ME |
3174 | return 0; |
3175 | } | |
3176 | ||
3177 | switch (cmd) { | |
3178 | case 'f': | |
3179 | dump_spu_fields(spu_info[num].spu); | |
3180 | break; | |
3181 | default: | |
af89fb80 | 3182 | dump_spu_ls(num, subcmd); |
24a24c85 ME |
3183 | break; |
3184 | } | |
3185 | ||
a8984970 | 3186 | break; |
ff8a8f25 ME |
3187 | default: |
3188 | return -1; | |
3189 | } | |
3190 | ||
3191 | return 0; | |
3192 | } | |
e055595d | 3193 | #else /* ! CONFIG_SPU_BASE */ |
ff8a8f25 ME |
3194 | static int do_spu_cmd(void) |
3195 | { | |
3196 | return -1; | |
3197 | } | |
3198 | #endif |