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> | |
ca5dd395 | 20 | #include <linux/kmsg_dump.h> |
1da177e4 | 21 | #include <linux/cpumask.h> |
4b16f8e2 | 22 | #include <linux/export.h> |
fca5dcd4 | 23 | #include <linux/sysrq.h> |
4694ca02 | 24 | #include <linux/interrupt.h> |
7d12e780 | 25 | #include <linux/irq.h> |
73c9ceab | 26 | #include <linux/bug.h> |
a71d64b4 | 27 | #include <linux/nmi.h> |
1da177e4 LT |
28 | |
29 | #include <asm/ptrace.h> | |
30 | #include <asm/string.h> | |
31 | #include <asm/prom.h> | |
32 | #include <asm/machdep.h> | |
f78541dc | 33 | #include <asm/xmon.h> |
1da177e4 LT |
34 | #include <asm/processor.h> |
35 | #include <asm/pgtable.h> | |
36 | #include <asm/mmu.h> | |
37 | #include <asm/mmu_context.h> | |
1da177e4 LT |
38 | #include <asm/cputable.h> |
39 | #include <asm/rtas.h> | |
40 | #include <asm/sstep.h> | |
f583ffce | 41 | #include <asm/irq_regs.h> |
ff8a8f25 ME |
42 | #include <asm/spu.h> |
43 | #include <asm/spu_priv1.h> | |
c3b75bd7 | 44 | #include <asm/setjmp.h> |
322b4394 | 45 | #include <asm/reg.h> |
ae3a197e | 46 | #include <asm/debug.h> |
9422de3e | 47 | #include <asm/hw_breakpoint.h> |
f78541dc PM |
48 | |
49 | #ifdef CONFIG_PPC64 | |
1da177e4 | 50 | #include <asm/hvcall.h> |
f78541dc PM |
51 | #include <asm/paca.h> |
52 | #endif | |
1da177e4 LT |
53 | |
54 | #include "nonstdio.h" | |
e0426047 | 55 | #include "dis-asm.h" |
1da177e4 | 56 | |
1da177e4 | 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; | |
ddadb6b8 ME |
62 | #else |
63 | #define xmon_owner 0 | |
1da177e4 LT |
64 | #endif /* CONFIG_SMP */ |
65 | ||
5be3492f | 66 | static unsigned long in_xmon __read_mostly = 0; |
1da177e4 LT |
67 | |
68 | static unsigned long adrs; | |
69 | static int size = 1; | |
70 | #define MAX_DUMP (128 * 1024) | |
71 | static unsigned long ndump = 64; | |
72 | static unsigned long nidump = 16; | |
73 | static unsigned long ncsum = 4096; | |
74 | static int termch; | |
75 | static char tmpstr[128]; | |
76 | ||
1da177e4 LT |
77 | static long bus_error_jmp[JMP_BUF_LEN]; |
78 | static int catch_memory_errors; | |
79 | static long *xmon_fault_jmp[NR_CPUS]; | |
1da177e4 LT |
80 | |
81 | /* Breakpoint stuff */ | |
82 | struct bpt { | |
83 | unsigned long address; | |
84 | unsigned int instr[2]; | |
85 | atomic_t ref_count; | |
86 | int enabled; | |
87 | unsigned long pad; | |
88 | }; | |
89 | ||
90 | /* Bits in bpt.enabled */ | |
91 | #define BP_IABR_TE 1 /* IABR translation enabled */ | |
92 | #define BP_IABR 2 | |
93 | #define BP_TRAP 8 | |
94 | #define BP_DABR 0x10 | |
95 | ||
96 | #define NBPTS 256 | |
97 | static struct bpt bpts[NBPTS]; | |
98 | static struct bpt dabr; | |
99 | static struct bpt *iabr; | |
100 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
101 | ||
102 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
103 | ||
104 | /* Prototypes */ | |
105 | static int cmds(struct pt_regs *); | |
106 | static int mread(unsigned long, void *, int); | |
107 | static int mwrite(unsigned long, void *, int); | |
108 | static int handle_fault(struct pt_regs *); | |
109 | static void byterev(unsigned char *, int); | |
110 | static void memex(void); | |
111 | static int bsesc(void); | |
112 | static void dump(void); | |
113 | static void prdump(unsigned long, long); | |
114 | static int ppc_inst_dump(unsigned long, long, int); | |
f312deb4 | 115 | static void dump_log_buf(void); |
1da177e4 LT |
116 | static void backtrace(struct pt_regs *); |
117 | static void excprint(struct pt_regs *); | |
118 | static void prregs(struct pt_regs *); | |
119 | static void memops(int); | |
120 | static void memlocate(void); | |
121 | static void memzcan(void); | |
122 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
123 | int skipbl(void); | |
124 | int scanhex(unsigned long *valp); | |
125 | static void scannl(void); | |
126 | static int hexdigit(int); | |
127 | void getstring(char *, int); | |
128 | static void flush_input(void); | |
129 | static int inchar(void); | |
130 | static void take_input(char *); | |
131 | static unsigned long read_spr(int); | |
132 | static void write_spr(int, unsigned long); | |
133 | static void super_regs(void); | |
134 | static void remove_bpts(void); | |
135 | static void insert_bpts(void); | |
136 | static void remove_cpu_bpts(void); | |
137 | static void insert_cpu_bpts(void); | |
138 | static struct bpt *at_breakpoint(unsigned long pc); | |
139 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
140 | static int do_step(struct pt_regs *); | |
141 | static void bpt_cmds(void); | |
142 | static void cacheflush(void); | |
143 | static int cpu_cmd(void); | |
144 | static void csum(void); | |
145 | static void bootcmds(void); | |
f78541dc | 146 | static void proccall(void); |
1da177e4 LT |
147 | void dump_segments(void); |
148 | static void symbol_lookup(void); | |
26c8af5f OH |
149 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
150 | unsigned long pc); | |
1da177e4 LT |
151 | static void xmon_print_symbol(unsigned long address, const char *mid, |
152 | const char *after); | |
153 | static const char *getvecname(unsigned long vec); | |
154 | ||
ff8a8f25 ME |
155 | static int do_spu_cmd(void); |
156 | ||
5a8a1a28 BH |
157 | #ifdef CONFIG_44x |
158 | static void dump_tlb_44x(void); | |
159 | #endif | |
03247157 BH |
160 | #ifdef CONFIG_PPC_BOOK3E |
161 | static void dump_tlb_book3e(void); | |
162 | #endif | |
5a8a1a28 | 163 | |
9f1067c2 | 164 | static int xmon_no_auto_backtrace; |
26c8af5f | 165 | |
f78541dc PM |
166 | extern void xmon_enter(void); |
167 | extern void xmon_leave(void); | |
168 | ||
f78541dc PM |
169 | #ifdef CONFIG_PPC64 |
170 | #define REG "%.16lx" | |
f78541dc PM |
171 | #else |
172 | #define REG "%.8lx" | |
f78541dc | 173 | #endif |
1da177e4 | 174 | |
72eceef6 PB |
175 | #ifdef __LITTLE_ENDIAN__ |
176 | #define GETWORD(v) (((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0]) | |
177 | #else | |
1da177e4 | 178 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
72eceef6 | 179 | #endif |
1da177e4 LT |
180 | |
181 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
182 | || ('a' <= (c) && (c) <= 'f') \ | |
183 | || ('A' <= (c) && (c) <= 'F')) | |
184 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
185 | || ('a' <= (c) && (c) <= 'z') \ | |
186 | || ('A' <= (c) && (c) <= 'Z')) | |
187 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
188 | ||
189 | static char *help_string = "\ | |
190 | Commands:\n\ | |
191 | b show breakpoints\n\ | |
192 | bd set data breakpoint\n\ | |
193 | bi set instruction breakpoint\n\ | |
194 | bc clear breakpoint\n" | |
195 | #ifdef CONFIG_SMP | |
196 | "\ | |
197 | c print cpus stopped in xmon\n\ | |
198 | c# try to switch to cpu number h (in hex)\n" | |
199 | #endif | |
200 | "\ | |
201 | C checksum\n\ | |
202 | d dump bytes\n\ | |
203 | di dump instructions\n\ | |
204 | df dump float values\n\ | |
205 | dd dump double values\n\ | |
ddadb6b8 ME |
206 | dl dump the kernel log buffer\n" |
207 | #ifdef CONFIG_PPC64 | |
208 | "\ | |
209 | dp[#] dump paca for current cpu, or cpu #\n\ | |
210 | dpa dump paca for all possible cpus\n" | |
211 | #endif | |
212 | "\ | |
7e5b5938 | 213 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
214 | e print exception information\n\ |
215 | f flush cache\n\ | |
216 | la lookup symbol+offset of specified address\n\ | |
217 | ls lookup address of specified symbol\n\ | |
218 | m examine/change memory\n\ | |
219 | mm move a block of memory\n\ | |
220 | ms set a block of memory\n\ | |
221 | md compare two blocks of memory\n\ | |
222 | ml locate a block of memory\n\ | |
223 | mz zero a block of memory\n\ | |
224 | mi show information about memory allocation\n\ | |
f78541dc | 225 | p call a procedure\n\ |
1da177e4 | 226 | r print registers\n\ |
ff8a8f25 | 227 | s single step\n" |
e055595d | 228 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 | 229 | " ss stop execution on all spus\n\ |
a8984970 | 230 | sr restore execution on stopped spus\n\ |
24a24c85 | 231 | sf # dump spu fields for spu # (in hex)\n\ |
c99176a2 | 232 | sd # dump spu local store for spu # (in hex)\n\ |
af89fb80 | 233 | sdi # disassemble spu local store for spu # (in hex)\n" |
ff8a8f25 ME |
234 | #endif |
235 | " S print special registers\n\ | |
1da177e4 | 236 | t print backtrace\n\ |
1da177e4 | 237 | x exit monitor and recover\n\ |
f78541dc | 238 | X exit monitor and dont recover\n" |
79873e8d | 239 | #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) |
f78541dc | 240 | " u dump segment table or SLB\n" |
79873e8d | 241 | #elif defined(CONFIG_PPC_STD_MMU_32) |
f78541dc | 242 | " u dump segment registers\n" |
79873e8d | 243 | #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) |
5a8a1a28 BH |
244 | " u dump TLB\n" |
245 | #endif | |
f78541dc PM |
246 | " ? help\n" |
247 | " zr reboot\n\ | |
1da177e4 LT |
248 | zh halt\n" |
249 | ; | |
250 | ||
251 | static struct pt_regs *xmon_regs; | |
252 | ||
f78541dc | 253 | static inline void sync(void) |
1da177e4 LT |
254 | { |
255 | asm volatile("sync; isync"); | |
256 | } | |
257 | ||
f78541dc PM |
258 | static inline void store_inst(void *p) |
259 | { | |
260 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
261 | } | |
262 | ||
263 | static inline void cflush(void *p) | |
264 | { | |
265 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
266 | } | |
267 | ||
268 | static inline void cinval(void *p) | |
269 | { | |
270 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
271 | } | |
1da177e4 LT |
272 | |
273 | /* | |
274 | * Disable surveillance (the service processor watchdog function) | |
275 | * while we are in xmon. | |
276 | * XXX we should re-enable it when we leave. :) | |
277 | */ | |
278 | #define SURVEILLANCE_TOKEN 9000 | |
279 | ||
280 | static inline void disable_surveillance(void) | |
281 | { | |
282 | #ifdef CONFIG_PPC_PSERIES | |
283 | /* Since this can't be a module, args should end up below 4GB. */ | |
284 | static struct rtas_args args; | |
285 | ||
286 | /* | |
287 | * At this point we have got all the cpus we can into | |
288 | * xmon, so there is hopefully no other cpu calling RTAS | |
289 | * at the moment, even though we don't take rtas.lock. | |
290 | * If we did try to take rtas.lock there would be a | |
291 | * real possibility of deadlock. | |
292 | */ | |
293 | args.token = rtas_token("set-indicator"); | |
294 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
295 | return; | |
296 | args.nargs = 3; | |
297 | args.nret = 1; | |
298 | args.rets = &args.args[3]; | |
299 | args.args[0] = SURVEILLANCE_TOKEN; | |
300 | args.args[1] = 0; | |
301 | args.args[2] = 0; | |
302 | enter_rtas(__pa(&args)); | |
303 | #endif /* CONFIG_PPC_PSERIES */ | |
304 | } | |
305 | ||
306 | #ifdef CONFIG_SMP | |
307 | static int xmon_speaker; | |
308 | ||
309 | static void get_output_lock(void) | |
310 | { | |
311 | int me = smp_processor_id() + 0x100; | |
312 | int last_speaker = 0, prev; | |
313 | long timeout; | |
314 | ||
315 | if (xmon_speaker == me) | |
316 | return; | |
730efb61 | 317 | |
1da177e4 | 318 | for (;;) { |
730efb61 ME |
319 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
320 | if (last_speaker == 0) | |
321 | return; | |
322 | ||
15075897 ME |
323 | /* |
324 | * Wait a full second for the lock, we might be on a slow | |
325 | * console, but check every 100us. | |
326 | */ | |
327 | timeout = 10000; | |
1da177e4 | 328 | while (xmon_speaker == last_speaker) { |
15075897 ME |
329 | if (--timeout > 0) { |
330 | udelay(100); | |
1da177e4 | 331 | continue; |
15075897 ME |
332 | } |
333 | ||
1da177e4 LT |
334 | /* hostile takeover */ |
335 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
336 | if (prev == last_speaker) | |
337 | return; | |
338 | break; | |
339 | } | |
340 | } | |
341 | } | |
342 | ||
343 | static void release_output_lock(void) | |
344 | { | |
345 | xmon_speaker = 0; | |
346 | } | |
1c8950ff ME |
347 | |
348 | int cpus_are_in_xmon(void) | |
349 | { | |
104699c0 | 350 | return !cpumask_empty(&cpus_in_xmon); |
1c8950ff | 351 | } |
1da177e4 LT |
352 | #endif |
353 | ||
daf8f403 JB |
354 | static inline int unrecoverable_excp(struct pt_regs *regs) |
355 | { | |
08f6d6ab | 356 | #if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E) |
66857b3a | 357 | /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */ |
daf8f403 JB |
358 | return 0; |
359 | #else | |
360 | return ((regs->msr & MSR_RI) == 0); | |
361 | #endif | |
362 | } | |
363 | ||
b0da9856 | 364 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
365 | { |
366 | int cmd = 0; | |
1da177e4 LT |
367 | struct bpt *bp; |
368 | long recurse_jmp[JMP_BUF_LEN]; | |
369 | unsigned long offset; | |
f13659e0 | 370 | unsigned long flags; |
1da177e4 LT |
371 | #ifdef CONFIG_SMP |
372 | int cpu; | |
373 | int secondary; | |
374 | unsigned long timeout; | |
375 | #endif | |
376 | ||
f13659e0 | 377 | local_irq_save(flags); |
a71d64b4 | 378 | hard_irq_disable(); |
1da177e4 LT |
379 | |
380 | bp = in_breakpoint_table(regs->nip, &offset); | |
381 | if (bp != NULL) { | |
382 | regs->nip = bp->address + offset; | |
383 | atomic_dec(&bp->ref_count); | |
384 | } | |
385 | ||
386 | remove_cpu_bpts(); | |
387 | ||
388 | #ifdef CONFIG_SMP | |
389 | cpu = smp_processor_id(); | |
104699c0 | 390 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
391 | get_output_lock(); |
392 | excprint(regs); | |
393 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
394 | "returning to main loop\n", | |
395 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 396 | release_output_lock(); |
1da177e4 LT |
397 | longjmp(xmon_fault_jmp[cpu], 1); |
398 | } | |
399 | ||
400 | if (setjmp(recurse_jmp) != 0) { | |
401 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 402 | get_output_lock(); |
1da177e4 LT |
403 | printf("xmon: WARNING: bad recursive fault " |
404 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 405 | release_output_lock(); |
1da177e4 LT |
406 | goto waiting; |
407 | } | |
408 | secondary = !(xmon_taken && cpu == xmon_owner); | |
409 | goto cmdloop; | |
410 | } | |
411 | ||
412 | xmon_fault_jmp[cpu] = recurse_jmp; | |
1da177e4 LT |
413 | |
414 | bp = NULL; | |
9f0b0793 | 415 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
1da177e4 | 416 | bp = at_breakpoint(regs->nip); |
daf8f403 | 417 | if (bp || unrecoverable_excp(regs)) |
1da177e4 LT |
418 | fromipi = 0; |
419 | ||
420 | if (!fromipi) { | |
421 | get_output_lock(); | |
422 | excprint(regs); | |
423 | if (bp) { | |
736256e4 | 424 | printf("cpu 0x%x stopped at breakpoint 0x%lx (", |
1da177e4 LT |
425 | cpu, BP_NUM(bp)); |
426 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
427 | } | |
daf8f403 | 428 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
429 | printf("WARNING: exception is not recoverable, " |
430 | "can't continue\n"); | |
431 | release_output_lock(); | |
432 | } | |
433 | ||
d2b496e5 ME |
434 | cpumask_set_cpu(cpu, &cpus_in_xmon); |
435 | ||
1da177e4 LT |
436 | waiting: |
437 | secondary = 1; | |
438 | while (secondary && !xmon_gate) { | |
439 | if (in_xmon == 0) { | |
440 | if (fromipi) | |
441 | goto leave; | |
442 | secondary = test_and_set_bit(0, &in_xmon); | |
443 | } | |
444 | barrier(); | |
445 | } | |
446 | ||
447 | if (!secondary && !xmon_gate) { | |
448 | /* we are the first cpu to come in */ | |
449 | /* interrupt other cpu(s) */ | |
450 | int ncpus = num_online_cpus(); | |
451 | ||
452 | xmon_owner = cpu; | |
453 | mb(); | |
454 | if (ncpus > 1) { | |
e0476371 | 455 | smp_send_debugger_break(); |
1da177e4 LT |
456 | /* wait for other cpus to come in */ |
457 | for (timeout = 100000000; timeout != 0; --timeout) { | |
104699c0 | 458 | if (cpumask_weight(&cpus_in_xmon) >= ncpus) |
1da177e4 LT |
459 | break; |
460 | barrier(); | |
461 | } | |
462 | } | |
463 | remove_bpts(); | |
464 | disable_surveillance(); | |
465 | /* for breakpoint or single step, print the current instr. */ | |
466 | if (bp || TRAP(regs) == 0xd00) | |
467 | ppc_inst_dump(regs->nip, 1, 0); | |
468 | printf("enter ? for help\n"); | |
469 | mb(); | |
470 | xmon_gate = 1; | |
471 | barrier(); | |
472 | } | |
473 | ||
474 | cmdloop: | |
475 | while (in_xmon) { | |
476 | if (secondary) { | |
477 | if (cpu == xmon_owner) { | |
478 | if (!test_and_set_bit(0, &xmon_taken)) { | |
479 | secondary = 0; | |
480 | continue; | |
481 | } | |
482 | /* missed it */ | |
483 | while (cpu == xmon_owner) | |
484 | barrier(); | |
485 | } | |
486 | barrier(); | |
487 | } else { | |
488 | cmd = cmds(regs); | |
489 | if (cmd != 0) { | |
490 | /* exiting xmon */ | |
491 | insert_bpts(); | |
492 | xmon_gate = 0; | |
493 | wmb(); | |
494 | in_xmon = 0; | |
495 | break; | |
496 | } | |
497 | /* have switched to some other cpu */ | |
498 | secondary = 1; | |
499 | } | |
500 | } | |
501 | leave: | |
104699c0 | 502 | cpumask_clear_cpu(cpu, &cpus_in_xmon); |
1da177e4 | 503 | xmon_fault_jmp[cpu] = NULL; |
1da177e4 LT |
504 | #else |
505 | /* UP is simple... */ | |
506 | if (in_xmon) { | |
507 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
508 | regs->trap, getvecname(TRAP(regs))); | |
509 | longjmp(xmon_fault_jmp[0], 1); | |
510 | } | |
511 | if (setjmp(recurse_jmp) == 0) { | |
512 | xmon_fault_jmp[0] = recurse_jmp; | |
513 | in_xmon = 1; | |
514 | ||
515 | excprint(regs); | |
516 | bp = at_breakpoint(regs->nip); | |
517 | if (bp) { | |
736256e4 | 518 | printf("Stopped at breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
519 | xmon_print_symbol(regs->nip, " ", ")\n"); |
520 | } | |
daf8f403 | 521 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
522 | printf("WARNING: exception is not recoverable, " |
523 | "can't continue\n"); | |
524 | remove_bpts(); | |
525 | disable_surveillance(); | |
526 | /* for breakpoint or single step, print the current instr. */ | |
527 | if (bp || TRAP(regs) == 0xd00) | |
528 | ppc_inst_dump(regs->nip, 1, 0); | |
529 | printf("enter ? for help\n"); | |
530 | } | |
531 | ||
532 | cmd = cmds(regs); | |
533 | ||
534 | insert_bpts(); | |
535 | in_xmon = 0; | |
536 | #endif | |
537 | ||
cdd3904d JB |
538 | #ifdef CONFIG_BOOKE |
539 | if (regs->msr & MSR_DE) { | |
540 | bp = at_breakpoint(regs->nip); | |
541 | if (bp != NULL) { | |
542 | regs->nip = (unsigned long) &bp->instr[0]; | |
543 | atomic_inc(&bp->ref_count); | |
544 | } | |
545 | } | |
546 | #else | |
9f0b0793 | 547 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
548 | bp = at_breakpoint(regs->nip); |
549 | if (bp != NULL) { | |
550 | int stepped = emulate_step(regs, bp->instr[0]); | |
551 | if (stepped == 0) { | |
552 | regs->nip = (unsigned long) &bp->instr[0]; | |
553 | atomic_inc(&bp->ref_count); | |
554 | } else if (stepped < 0) { | |
555 | printf("Couldn't single-step %s instruction\n", | |
556 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
557 | } | |
558 | } | |
559 | } | |
cdd3904d | 560 | #endif |
1da177e4 LT |
561 | insert_cpu_bpts(); |
562 | ||
a71d64b4 | 563 | touch_nmi_watchdog(); |
f13659e0 | 564 | local_irq_restore(flags); |
1da177e4 | 565 | |
0a730ae5 | 566 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
567 | } |
568 | ||
569 | int xmon(struct pt_regs *excp) | |
570 | { | |
571 | struct pt_regs regs; | |
572 | ||
573 | if (excp == NULL) { | |
322b4394 | 574 | ppc_save_regs(®s); |
1da177e4 LT |
575 | excp = ®s; |
576 | } | |
ff8a8f25 | 577 | |
1da177e4 LT |
578 | return xmon_core(excp, 0); |
579 | } | |
f78541dc PM |
580 | EXPORT_SYMBOL(xmon); |
581 | ||
f583ffce | 582 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
583 | { |
584 | unsigned long flags; | |
585 | local_irq_save(flags); | |
586 | printf("Keyboard interrupt\n"); | |
f583ffce | 587 | xmon(get_irq_regs()); |
f78541dc PM |
588 | local_irq_restore(flags); |
589 | return IRQ_HANDLED; | |
590 | } | |
1da177e4 | 591 | |
b0da9856 | 592 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
593 | { |
594 | struct bpt *bp; | |
595 | unsigned long offset; | |
596 | ||
9f0b0793 | 597 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 LT |
598 | return 0; |
599 | ||
600 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
601 | bp = in_breakpoint_table(regs->nip, &offset); | |
602 | if (bp != NULL && offset == 4) { | |
603 | regs->nip = bp->address + 4; | |
604 | atomic_dec(&bp->ref_count); | |
605 | return 1; | |
606 | } | |
607 | ||
608 | /* Are we at a breakpoint? */ | |
609 | bp = at_breakpoint(regs->nip); | |
610 | if (!bp) | |
611 | return 0; | |
612 | ||
613 | xmon_core(regs, 0); | |
614 | ||
615 | return 1; | |
616 | } | |
617 | ||
b0da9856 | 618 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
619 | { |
620 | if (user_mode(regs)) | |
621 | return 0; | |
622 | xmon_core(regs, 0); | |
623 | return 1; | |
624 | } | |
625 | ||
9422de3e | 626 | static int xmon_break_match(struct pt_regs *regs) |
1da177e4 | 627 | { |
9f0b0793 | 628 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 629 | return 0; |
fd9648df AB |
630 | if (dabr.enabled == 0) |
631 | return 0; | |
1da177e4 LT |
632 | xmon_core(regs, 0); |
633 | return 1; | |
634 | } | |
635 | ||
b0da9856 | 636 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 | 637 | { |
9f0b0793 | 638 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 639 | return 0; |
9f1067c2 | 640 | if (iabr == NULL) |
1da177e4 LT |
641 | return 0; |
642 | xmon_core(regs, 0); | |
643 | return 1; | |
644 | } | |
645 | ||
b0da9856 | 646 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
647 | { |
648 | #ifdef CONFIG_SMP | |
104699c0 | 649 | if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
1da177e4 LT |
650 | xmon_core(regs, 1); |
651 | #endif | |
652 | return 0; | |
653 | } | |
654 | ||
b0da9856 | 655 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
656 | { |
657 | struct bpt *bp; | |
658 | unsigned long offset; | |
659 | ||
660 | if (in_xmon && catch_memory_errors) | |
661 | handle_fault(regs); /* doesn't return */ | |
662 | ||
9f0b0793 | 663 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
664 | bp = in_breakpoint_table(regs->nip, &offset); |
665 | if (bp != NULL) { | |
666 | regs->nip = bp->address + offset; | |
667 | atomic_dec(&bp->ref_count); | |
668 | } | |
669 | } | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
1da177e4 LT |
674 | static struct bpt *at_breakpoint(unsigned long pc) |
675 | { | |
676 | int i; | |
677 | struct bpt *bp; | |
678 | ||
679 | bp = bpts; | |
680 | for (i = 0; i < NBPTS; ++i, ++bp) | |
681 | if (bp->enabled && pc == bp->address) | |
682 | return bp; | |
683 | return NULL; | |
684 | } | |
685 | ||
686 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
687 | { | |
688 | unsigned long off; | |
689 | ||
690 | off = nip - (unsigned long) bpts; | |
691 | if (off >= sizeof(bpts)) | |
692 | return NULL; | |
693 | off %= sizeof(struct bpt); | |
694 | if (off != offsetof(struct bpt, instr[0]) | |
695 | && off != offsetof(struct bpt, instr[1])) | |
696 | return NULL; | |
697 | *offp = off - offsetof(struct bpt, instr[0]); | |
698 | return (struct bpt *) (nip - off); | |
699 | } | |
700 | ||
701 | static struct bpt *new_breakpoint(unsigned long a) | |
702 | { | |
703 | struct bpt *bp; | |
704 | ||
705 | a &= ~3UL; | |
706 | bp = at_breakpoint(a); | |
707 | if (bp) | |
708 | return bp; | |
709 | ||
710 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
711 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
712 | bp->address = a; | |
713 | bp->instr[1] = bpinstr; | |
714 | store_inst(&bp->instr[1]); | |
715 | return bp; | |
716 | } | |
717 | } | |
718 | ||
719 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
720 | return NULL; | |
721 | } | |
722 | ||
723 | static void insert_bpts(void) | |
724 | { | |
725 | int i; | |
726 | struct bpt *bp; | |
727 | ||
728 | bp = bpts; | |
729 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
730 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) | |
731 | continue; | |
732 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
733 | printf("Couldn't read instruction at %lx, " | |
734 | "disabling breakpoint there\n", bp->address); | |
735 | bp->enabled = 0; | |
736 | continue; | |
737 | } | |
738 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
739 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
740 | "instruction, disabling it\n", bp->address); | |
741 | bp->enabled = 0; | |
742 | continue; | |
743 | } | |
744 | store_inst(&bp->instr[0]); | |
745 | if (bp->enabled & BP_IABR) | |
746 | continue; | |
747 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
748 | printf("Couldn't write instruction at %lx, " | |
749 | "disabling breakpoint there\n", bp->address); | |
750 | bp->enabled &= ~BP_TRAP; | |
751 | continue; | |
752 | } | |
753 | store_inst((void *)bp->address); | |
754 | } | |
755 | } | |
756 | ||
757 | static void insert_cpu_bpts(void) | |
758 | { | |
9422de3e MN |
759 | struct arch_hw_breakpoint brk; |
760 | ||
761 | if (dabr.enabled) { | |
762 | brk.address = dabr.address; | |
763 | brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL; | |
764 | brk.len = 8; | |
21f58507 | 765 | __set_breakpoint(&brk); |
9422de3e | 766 | } |
1da177e4 | 767 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 768 | mtspr(SPRN_IABR, iabr->address |
1da177e4 LT |
769 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
770 | } | |
771 | ||
772 | static void remove_bpts(void) | |
773 | { | |
774 | int i; | |
775 | struct bpt *bp; | |
776 | unsigned instr; | |
777 | ||
778 | bp = bpts; | |
779 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
780 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) | |
781 | continue; | |
782 | if (mread(bp->address, &instr, 4) == 4 | |
783 | && instr == bpinstr | |
784 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
785 | printf("Couldn't remove breakpoint at %lx\n", | |
786 | bp->address); | |
787 | else | |
788 | store_inst((void *)bp->address); | |
789 | } | |
790 | } | |
791 | ||
792 | static void remove_cpu_bpts(void) | |
793 | { | |
9422de3e | 794 | hw_breakpoint_disable(); |
1da177e4 | 795 | if (cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 796 | mtspr(SPRN_IABR, 0); |
1da177e4 LT |
797 | } |
798 | ||
799 | /* Command interpreting routine */ | |
800 | static char *last_cmd; | |
801 | ||
802 | static int | |
803 | cmds(struct pt_regs *excp) | |
804 | { | |
805 | int cmd = 0; | |
806 | ||
807 | last_cmd = NULL; | |
808 | xmon_regs = excp; | |
26c8af5f OH |
809 | |
810 | if (!xmon_no_auto_backtrace) { | |
811 | xmon_no_auto_backtrace = 1; | |
812 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
813 | } | |
814 | ||
1da177e4 LT |
815 | for(;;) { |
816 | #ifdef CONFIG_SMP | |
817 | printf("%x:", smp_processor_id()); | |
818 | #endif /* CONFIG_SMP */ | |
819 | printf("mon> "); | |
1da177e4 LT |
820 | flush_input(); |
821 | termch = 0; | |
822 | cmd = skipbl(); | |
823 | if( cmd == '\n' ) { | |
824 | if (last_cmd == NULL) | |
825 | continue; | |
826 | take_input(last_cmd); | |
827 | last_cmd = NULL; | |
828 | cmd = inchar(); | |
829 | } | |
830 | switch (cmd) { | |
831 | case 'm': | |
832 | cmd = inchar(); | |
833 | switch (cmd) { | |
834 | case 'm': | |
835 | case 's': | |
836 | case 'd': | |
837 | memops(cmd); | |
838 | break; | |
839 | case 'l': | |
840 | memlocate(); | |
841 | break; | |
842 | case 'z': | |
843 | memzcan(); | |
844 | break; | |
845 | case 'i': | |
b2b755b5 | 846 | show_mem(0); |
1da177e4 LT |
847 | break; |
848 | default: | |
849 | termch = cmd; | |
850 | memex(); | |
851 | } | |
852 | break; | |
853 | case 'd': | |
854 | dump(); | |
855 | break; | |
856 | case 'l': | |
857 | symbol_lookup(); | |
858 | break; | |
859 | case 'r': | |
860 | prregs(excp); /* print regs */ | |
861 | break; | |
862 | case 'e': | |
863 | excprint(excp); | |
864 | break; | |
865 | case 'S': | |
866 | super_regs(); | |
867 | break; | |
868 | case 't': | |
869 | backtrace(excp); | |
870 | break; | |
871 | case 'f': | |
872 | cacheflush(); | |
873 | break; | |
874 | case 's': | |
ff8a8f25 ME |
875 | if (do_spu_cmd() == 0) |
876 | break; | |
1da177e4 LT |
877 | if (do_step(excp)) |
878 | return cmd; | |
879 | break; | |
880 | case 'x': | |
881 | case 'X': | |
bb6b9b28 | 882 | return cmd; |
1da177e4 | 883 | case EOF: |
bb6b9b28 BH |
884 | printf(" <no input ...>\n"); |
885 | mdelay(2000); | |
1da177e4 LT |
886 | return cmd; |
887 | case '?': | |
4d404edc | 888 | xmon_puts(help_string); |
1da177e4 | 889 | break; |
1da177e4 LT |
890 | case 'b': |
891 | bpt_cmds(); | |
892 | break; | |
893 | case 'C': | |
894 | csum(); | |
895 | break; | |
896 | case 'c': | |
897 | if (cpu_cmd()) | |
898 | return 0; | |
899 | break; | |
900 | case 'z': | |
901 | bootcmds(); | |
902 | break; | |
f78541dc PM |
903 | case 'p': |
904 | proccall(); | |
1da177e4 | 905 | break; |
f78541dc | 906 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
907 | case 'u': |
908 | dump_segments(); | |
909 | break; | |
79873e8d | 910 | #elif defined(CONFIG_4xx) |
5a8a1a28 BH |
911 | case 'u': |
912 | dump_tlb_44x(); | |
913 | break; | |
79873e8d | 914 | #elif defined(CONFIG_PPC_BOOK3E) |
03247157 BH |
915 | case 'u': |
916 | dump_tlb_book3e(); | |
917 | break; | |
f78541dc | 918 | #endif |
1da177e4 LT |
919 | default: |
920 | printf("Unrecognized command: "); | |
e3bc8049 | 921 | do { |
1da177e4 LT |
922 | if (' ' < cmd && cmd <= '~') |
923 | putchar(cmd); | |
924 | else | |
925 | printf("\\x%x", cmd); | |
926 | cmd = inchar(); | |
e3bc8049 | 927 | } while (cmd != '\n'); |
1da177e4 LT |
928 | printf(" (type ? for help)\n"); |
929 | break; | |
930 | } | |
931 | } | |
932 | } | |
933 | ||
cdd3904d JB |
934 | #ifdef CONFIG_BOOKE |
935 | static int do_step(struct pt_regs *regs) | |
936 | { | |
937 | regs->msr |= MSR_DE; | |
938 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
939 | return 1; | |
940 | } | |
941 | #else | |
1da177e4 LT |
942 | /* |
943 | * Step a single instruction. | |
944 | * Some instructions we emulate, others we execute with MSR_SE set. | |
945 | */ | |
946 | static int do_step(struct pt_regs *regs) | |
947 | { | |
948 | unsigned int instr; | |
949 | int stepped; | |
950 | ||
951 | /* check we are in 64-bit kernel mode, translation enabled */ | |
9f0b0793 | 952 | if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
1da177e4 LT |
953 | if (mread(regs->nip, &instr, 4) == 4) { |
954 | stepped = emulate_step(regs, instr); | |
955 | if (stepped < 0) { | |
956 | printf("Couldn't single-step %s instruction\n", | |
957 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
958 | return 0; | |
959 | } | |
960 | if (stepped > 0) { | |
961 | regs->trap = 0xd00 | (regs->trap & 1); | |
962 | printf("stepped to "); | |
963 | xmon_print_symbol(regs->nip, " ", "\n"); | |
964 | ppc_inst_dump(regs->nip, 1, 0); | |
965 | return 0; | |
966 | } | |
967 | } | |
968 | } | |
969 | regs->msr |= MSR_SE; | |
970 | return 1; | |
971 | } | |
cdd3904d | 972 | #endif |
1da177e4 LT |
973 | |
974 | static void bootcmds(void) | |
975 | { | |
976 | int cmd; | |
977 | ||
978 | cmd = inchar(); | |
979 | if (cmd == 'r') | |
980 | ppc_md.restart(NULL); | |
981 | else if (cmd == 'h') | |
982 | ppc_md.halt(); | |
983 | else if (cmd == 'p') | |
984 | ppc_md.power_off(); | |
985 | } | |
986 | ||
987 | static int cpu_cmd(void) | |
988 | { | |
989 | #ifdef CONFIG_SMP | |
fd3bb912 | 990 | unsigned long cpu, first_cpu, last_cpu; |
1da177e4 | 991 | int timeout; |
1da177e4 LT |
992 | |
993 | if (!scanhex(&cpu)) { | |
994 | /* print cpus waiting or in xmon */ | |
995 | printf("cpus stopped:"); | |
fd3bb912 | 996 | last_cpu = first_cpu = NR_CPUS; |
bc1d7702 | 997 | for_each_possible_cpu(cpu) { |
104699c0 | 998 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
fd3bb912 PM |
999 | if (cpu == last_cpu + 1) { |
1000 | last_cpu = cpu; | |
1001 | } else { | |
1002 | if (last_cpu != first_cpu) | |
736256e4 | 1003 | printf("-0x%lx", last_cpu); |
fd3bb912 | 1004 | last_cpu = first_cpu = cpu; |
736256e4 | 1005 | printf(" 0x%lx", cpu); |
fd3bb912 | 1006 | } |
1da177e4 LT |
1007 | } |
1008 | } | |
fd3bb912 | 1009 | if (last_cpu != first_cpu) |
736256e4 | 1010 | printf("-0x%lx", last_cpu); |
1da177e4 LT |
1011 | printf("\n"); |
1012 | return 0; | |
1013 | } | |
1014 | /* try to switch to cpu specified */ | |
104699c0 | 1015 | if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
1016 | printf("cpu 0x%x isn't in xmon\n", cpu); |
1017 | return 0; | |
1018 | } | |
1019 | xmon_taken = 0; | |
1020 | mb(); | |
1021 | xmon_owner = cpu; | |
1022 | timeout = 10000000; | |
1023 | while (!xmon_taken) { | |
1024 | if (--timeout == 0) { | |
1025 | if (test_and_set_bit(0, &xmon_taken)) | |
1026 | break; | |
1027 | /* take control back */ | |
1028 | mb(); | |
1029 | xmon_owner = smp_processor_id(); | |
736256e4 | 1030 | printf("cpu 0x%x didn't take control\n", cpu); |
1da177e4 LT |
1031 | return 0; |
1032 | } | |
1033 | barrier(); | |
1034 | } | |
1035 | return 1; | |
1036 | #else | |
1037 | return 0; | |
1038 | #endif /* CONFIG_SMP */ | |
1039 | } | |
1040 | ||
1041 | static unsigned short fcstab[256] = { | |
1042 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
1043 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
1044 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
1045 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
1046 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
1047 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
1048 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
1049 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
1050 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
1051 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
1052 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
1053 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
1054 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
1055 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
1056 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
1057 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
1058 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
1059 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
1060 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
1061 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
1062 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
1063 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1064 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1065 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1066 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1067 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1068 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1069 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1070 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1071 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1072 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1073 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1074 | }; | |
1075 | ||
1076 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1077 | ||
1078 | static void | |
1079 | csum(void) | |
1080 | { | |
1081 | unsigned int i; | |
1082 | unsigned short fcs; | |
1083 | unsigned char v; | |
1084 | ||
1085 | if (!scanhex(&adrs)) | |
1086 | return; | |
1087 | if (!scanhex(&ncsum)) | |
1088 | return; | |
1089 | fcs = 0xffff; | |
1090 | for (i = 0; i < ncsum; ++i) { | |
1091 | if (mread(adrs+i, &v, 1) == 0) { | |
736256e4 | 1092 | printf("csum stopped at "REG"\n", adrs+i); |
1da177e4 LT |
1093 | break; |
1094 | } | |
1095 | fcs = FCS(fcs, v); | |
1096 | } | |
1097 | printf("%x\n", fcs); | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Check if this is a suitable place to put a breakpoint. | |
1102 | */ | |
1103 | static long check_bp_loc(unsigned long addr) | |
1104 | { | |
1105 | unsigned int instr; | |
1106 | ||
1107 | addr &= ~3; | |
51fae6de | 1108 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1109 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1110 | return 0; | |
1111 | } | |
1112 | if (!mread(addr, &instr, sizeof(instr))) { | |
1113 | printf("Can't read instruction at address %lx\n", addr); | |
1114 | return 0; | |
1115 | } | |
1116 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1117 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1118 | "instructions\n"); | |
1119 | return 0; | |
1120 | } | |
1121 | return 1; | |
1122 | } | |
1123 | ||
e3bc8049 | 1124 | static char *breakpoint_help_string = |
1da177e4 LT |
1125 | "Breakpoint command usage:\n" |
1126 | "b show breakpoints\n" | |
1127 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1128 | "bc clear all breakpoints\n" | |
1129 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1130 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" | |
1131 | "bd <addr> [cnt] set hardware data breakpoint\n" | |
1132 | ""; | |
1133 | ||
1134 | static void | |
1135 | bpt_cmds(void) | |
1136 | { | |
1137 | int cmd; | |
1138 | unsigned long a; | |
1139 | int mode, i; | |
1140 | struct bpt *bp; | |
1141 | const char badaddr[] = "Only kernel addresses are permitted " | |
1142 | "for breakpoints\n"; | |
1143 | ||
1144 | cmd = inchar(); | |
1145 | switch (cmd) { | |
f78541dc | 1146 | #ifndef CONFIG_8xx |
1da177e4 LT |
1147 | case 'd': /* bd - hardware data breakpoint */ |
1148 | mode = 7; | |
1149 | cmd = inchar(); | |
1150 | if (cmd == 'r') | |
1151 | mode = 5; | |
1152 | else if (cmd == 'w') | |
1153 | mode = 6; | |
1154 | else | |
1155 | termch = cmd; | |
1156 | dabr.address = 0; | |
1157 | dabr.enabled = 0; | |
1158 | if (scanhex(&dabr.address)) { | |
51fae6de | 1159 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1160 | printf(badaddr); |
1161 | break; | |
1162 | } | |
9422de3e | 1163 | dabr.address &= ~HW_BRK_TYPE_DABR; |
1da177e4 LT |
1164 | dabr.enabled = mode | BP_DABR; |
1165 | } | |
1166 | break; | |
1167 | ||
1168 | case 'i': /* bi - hardware instr breakpoint */ | |
1169 | if (!cpu_has_feature(CPU_FTR_IABR)) { | |
1170 | printf("Hardware instruction breakpoint " | |
1171 | "not supported on this cpu\n"); | |
1172 | break; | |
1173 | } | |
1174 | if (iabr) { | |
1175 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); | |
1176 | iabr = NULL; | |
1177 | } | |
1178 | if (!scanhex(&a)) | |
1179 | break; | |
1180 | if (!check_bp_loc(a)) | |
1181 | break; | |
1182 | bp = new_breakpoint(a); | |
1183 | if (bp != NULL) { | |
1184 | bp->enabled |= BP_IABR | BP_IABR_TE; | |
1185 | iabr = bp; | |
1186 | } | |
1187 | break; | |
f78541dc | 1188 | #endif |
1da177e4 LT |
1189 | |
1190 | case 'c': | |
1191 | if (!scanhex(&a)) { | |
1192 | /* clear all breakpoints */ | |
1193 | for (i = 0; i < NBPTS; ++i) | |
1194 | bpts[i].enabled = 0; | |
1195 | iabr = NULL; | |
1196 | dabr.enabled = 0; | |
1197 | printf("All breakpoints cleared\n"); | |
1198 | break; | |
1199 | } | |
1200 | ||
1201 | if (a <= NBPTS && a >= 1) { | |
1202 | /* assume a breakpoint number */ | |
1203 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1204 | } else { | |
1205 | /* assume a breakpoint address */ | |
1206 | bp = at_breakpoint(a); | |
9f1067c2 | 1207 | if (bp == NULL) { |
736256e4 | 1208 | printf("No breakpoint at %lx\n", a); |
1da177e4 LT |
1209 | break; |
1210 | } | |
1211 | } | |
1212 | ||
736256e4 | 1213 | printf("Cleared breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
1214 | xmon_print_symbol(bp->address, " ", ")\n"); |
1215 | bp->enabled = 0; | |
1216 | break; | |
1217 | ||
1218 | default: | |
1219 | termch = cmd; | |
e3bc8049 | 1220 | cmd = skipbl(); |
1da177e4 LT |
1221 | if (cmd == '?') { |
1222 | printf(breakpoint_help_string); | |
1223 | break; | |
1224 | } | |
1225 | termch = cmd; | |
1226 | if (!scanhex(&a)) { | |
1227 | /* print all breakpoints */ | |
1228 | printf(" type address\n"); | |
1229 | if (dabr.enabled) { | |
f78541dc | 1230 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1231 | if (dabr.enabled & 1) |
1232 | printf("r"); | |
1233 | if (dabr.enabled & 2) | |
1234 | printf("w"); | |
1235 | printf("]\n"); | |
1236 | } | |
1237 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1238 | if (!bp->enabled) | |
1239 | continue; | |
1240 | printf("%2x %s ", BP_NUM(bp), | |
1241 | (bp->enabled & BP_IABR)? "inst": "trap"); | |
1242 | xmon_print_symbol(bp->address, " ", "\n"); | |
1243 | } | |
1244 | break; | |
1245 | } | |
1246 | ||
1247 | if (!check_bp_loc(a)) | |
1248 | break; | |
1249 | bp = new_breakpoint(a); | |
1250 | if (bp != NULL) | |
1251 | bp->enabled |= BP_TRAP; | |
1252 | break; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | /* Very cheap human name for vector lookup. */ | |
1257 | static | |
1258 | const char *getvecname(unsigned long vec) | |
1259 | { | |
1260 | char *ret; | |
1261 | ||
1262 | switch (vec) { | |
1263 | case 0x100: ret = "(System Reset)"; break; | |
1264 | case 0x200: ret = "(Machine Check)"; break; | |
1265 | case 0x300: ret = "(Data Access)"; break; | |
1266 | case 0x380: ret = "(Data SLB Access)"; break; | |
1267 | case 0x400: ret = "(Instruction Access)"; break; | |
1268 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1269 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1270 | case 0x600: ret = "(Alignment)"; break; | |
1271 | case 0x700: ret = "(Program Check)"; break; | |
1272 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1273 | case 0x900: ret = "(Decrementer)"; break; | |
660e034c ME |
1274 | case 0x980: ret = "(Hypervisor Decrementer)"; break; |
1275 | case 0xa00: ret = "(Doorbell)"; break; | |
1da177e4 LT |
1276 | case 0xc00: ret = "(System Call)"; break; |
1277 | case 0xd00: ret = "(Single Step)"; break; | |
660e034c ME |
1278 | case 0xe40: ret = "(Emulation Assist)"; break; |
1279 | case 0xe60: ret = "(HMI)"; break; | |
1280 | case 0xe80: ret = "(Hypervisor Doorbell)"; break; | |
1da177e4 LT |
1281 | case 0xf00: ret = "(Performance Monitor)"; break; |
1282 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1283 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
660e034c ME |
1284 | case 0x1500: ret = "(Denormalisation)"; break; |
1285 | case 0x1700: ret = "(Altivec Assist)"; break; | |
1da177e4 LT |
1286 | default: ret = ""; |
1287 | } | |
1288 | return ret; | |
1289 | } | |
1290 | ||
1291 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1292 | unsigned long *endp) | |
1293 | { | |
1294 | unsigned long size, offset; | |
1295 | const char *name; | |
1da177e4 LT |
1296 | |
1297 | *startp = *endp = 0; | |
1298 | if (pc == 0) | |
1299 | return; | |
1300 | if (setjmp(bus_error_jmp) == 0) { | |
1301 | catch_memory_errors = 1; | |
1302 | sync(); | |
ffb45122 | 1303 | name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
1da177e4 LT |
1304 | if (name != NULL) { |
1305 | *startp = pc - offset; | |
1306 | *endp = pc - offset + size; | |
1307 | } | |
1308 | sync(); | |
1309 | } | |
1310 | catch_memory_errors = 0; | |
1311 | } | |
1312 | ||
ec2b36b9 BH |
1313 | #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
1314 | #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) | |
1315 | ||
1da177e4 LT |
1316 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1317 | unsigned long pc) | |
1318 | { | |
0104cd68 | 1319 | int max_to_print = 64; |
1da177e4 LT |
1320 | unsigned long ip; |
1321 | unsigned long newsp; | |
1322 | unsigned long marker; | |
1da177e4 LT |
1323 | struct pt_regs regs; |
1324 | ||
0104cd68 | 1325 | while (max_to_print--) { |
1da177e4 LT |
1326 | if (sp < PAGE_OFFSET) { |
1327 | if (sp != 0) | |
1328 | printf("SP (%lx) is in userspace\n", sp); | |
1329 | break; | |
1330 | } | |
1331 | ||
f78541dc | 1332 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1333 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1334 | printf("Couldn't read stack frame at %lx\n", sp); | |
1335 | break; | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * For the first stack frame, try to work out if | |
1340 | * LR and/or the saved LR value in the bottommost | |
1341 | * stack frame are valid. | |
1342 | */ | |
1343 | if ((pc | lr) != 0) { | |
1344 | unsigned long fnstart, fnend; | |
1345 | unsigned long nextip; | |
1346 | int printip = 1; | |
1347 | ||
1348 | get_function_bounds(pc, &fnstart, &fnend); | |
1349 | nextip = 0; | |
1350 | if (newsp > sp) | |
f78541dc | 1351 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1352 | sizeof(unsigned long)); |
1353 | if (lr == ip) { | |
1354 | if (lr < PAGE_OFFSET | |
1355 | || (fnstart <= lr && lr < fnend)) | |
1356 | printip = 0; | |
1357 | } else if (lr == nextip) { | |
1358 | printip = 0; | |
1359 | } else if (lr >= PAGE_OFFSET | |
1360 | && !(fnstart <= lr && lr < fnend)) { | |
1361 | printf("[link register ] "); | |
1362 | xmon_print_symbol(lr, " ", "\n"); | |
1363 | } | |
1364 | if (printip) { | |
f78541dc | 1365 | printf("["REG"] ", sp); |
1da177e4 LT |
1366 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1367 | } | |
1368 | pc = lr = 0; | |
1369 | ||
1370 | } else { | |
f78541dc | 1371 | printf("["REG"] ", sp); |
1da177e4 LT |
1372 | xmon_print_symbol(ip, " ", "\n"); |
1373 | } | |
1374 | ||
1375 | /* Look for "regshere" marker to see if this is | |
1376 | an exception frame. */ | |
f78541dc | 1377 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
ec2b36b9 | 1378 | && marker == STACK_FRAME_REGS_MARKER) { |
c4de3809 | 1379 | if (mread(sp + STACK_FRAME_OVERHEAD, ®s, sizeof(regs)) |
1da177e4 LT |
1380 | != sizeof(regs)) { |
1381 | printf("Couldn't read registers at %lx\n", | |
c4de3809 | 1382 | sp + STACK_FRAME_OVERHEAD); |
1da177e4 LT |
1383 | break; |
1384 | } | |
e3bc8049 | 1385 | printf("--- Exception: %lx %s at ", regs.trap, |
1da177e4 LT |
1386 | getvecname(TRAP(®s))); |
1387 | pc = regs.nip; | |
1388 | lr = regs.link; | |
1389 | xmon_print_symbol(pc, " ", "\n"); | |
1390 | } | |
1391 | ||
1392 | if (newsp == 0) | |
1393 | break; | |
1394 | ||
1395 | sp = newsp; | |
0104cd68 | 1396 | } |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | static void backtrace(struct pt_regs *excp) | |
1400 | { | |
1401 | unsigned long sp; | |
1402 | ||
1403 | if (scanhex(&sp)) | |
1404 | xmon_show_stack(sp, 0, 0); | |
1405 | else | |
1406 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1407 | scannl(); | |
1408 | } | |
1409 | ||
1410 | static void print_bug_trap(struct pt_regs *regs) | |
1411 | { | |
ebdba9af | 1412 | #ifdef CONFIG_BUG |
73c9ceab | 1413 | const struct bug_entry *bug; |
1da177e4 LT |
1414 | unsigned long addr; |
1415 | ||
1416 | if (regs->msr & MSR_PR) | |
1417 | return; /* not in kernel */ | |
1418 | addr = regs->nip; /* address of trap instruction */ | |
1419 | if (addr < PAGE_OFFSET) | |
1420 | return; | |
1421 | bug = find_bug(regs->nip); | |
1422 | if (bug == NULL) | |
1423 | return; | |
73c9ceab | 1424 | if (is_warning_bug(bug)) |
1da177e4 LT |
1425 | return; |
1426 | ||
0a7c7efc | 1427 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
73c9ceab JF |
1428 | printf("kernel BUG at %s:%u!\n", |
1429 | bug->file, bug->line); | |
0a7c7efc SR |
1430 | #else |
1431 | printf("kernel BUG at %p!\n", (void *)bug->bug_addr); | |
1432 | #endif | |
ebdba9af | 1433 | #endif /* CONFIG_BUG */ |
1da177e4 LT |
1434 | } |
1435 | ||
9f1067c2 | 1436 | static void excprint(struct pt_regs *fp) |
1da177e4 LT |
1437 | { |
1438 | unsigned long trap; | |
1439 | ||
1440 | #ifdef CONFIG_SMP | |
1441 | printf("cpu 0x%x: ", smp_processor_id()); | |
1442 | #endif /* CONFIG_SMP */ | |
1443 | ||
1444 | trap = TRAP(fp); | |
1445 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1446 | printf(" pc: "); | |
1447 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1448 | ||
1449 | printf(" lr: ", fp->link); | |
1450 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1451 | ||
1452 | printf(" sp: %lx\n", fp->gpr[1]); | |
1453 | printf(" msr: %lx\n", fp->msr); | |
1454 | ||
ce54152f | 1455 | if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) { |
1da177e4 LT |
1456 | printf(" dar: %lx\n", fp->dar); |
1457 | if (trap != 0x380) | |
1458 | printf(" dsisr: %lx\n", fp->dsisr); | |
1459 | } | |
1460 | ||
1461 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1462 | #ifdef CONFIG_PPC64 |
7230c564 BH |
1463 | printf(" paca = 0x%lx\t softe: %d\t irq_happened: 0x%02x\n", |
1464 | local_paca, local_paca->soft_enabled, local_paca->irq_happened); | |
f78541dc | 1465 | #endif |
1da177e4 LT |
1466 | if (current) { |
1467 | printf(" pid = %ld, comm = %s\n", | |
1468 | current->pid, current->comm); | |
1469 | } | |
1470 | ||
1471 | if (trap == 0x700) | |
1472 | print_bug_trap(fp); | |
1473 | } | |
1474 | ||
9f1067c2 | 1475 | static void prregs(struct pt_regs *fp) |
1da177e4 | 1476 | { |
f78541dc | 1477 | int n, trap; |
1da177e4 LT |
1478 | unsigned long base; |
1479 | struct pt_regs regs; | |
1480 | ||
1481 | if (scanhex(&base)) { | |
1482 | if (setjmp(bus_error_jmp) == 0) { | |
1483 | catch_memory_errors = 1; | |
1484 | sync(); | |
1485 | regs = *(struct pt_regs *)base; | |
1486 | sync(); | |
1487 | __delay(200); | |
1488 | } else { | |
1489 | catch_memory_errors = 0; | |
f78541dc | 1490 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1491 | base); |
1492 | return; | |
1493 | } | |
1494 | catch_memory_errors = 0; | |
1495 | fp = ®s; | |
1496 | } | |
1497 | ||
f78541dc | 1498 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1499 | if (FULL_REGS(fp)) { |
1500 | for (n = 0; n < 16; ++n) | |
f78541dc | 1501 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1502 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1503 | } else { | |
1504 | for (n = 0; n < 7; ++n) | |
f78541dc | 1505 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1506 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1507 | } | |
f78541dc PM |
1508 | #else |
1509 | for (n = 0; n < 32; ++n) { | |
1510 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1511 | (n & 3) == 3? "\n": " "); | |
1512 | if (n == 12 && !FULL_REGS(fp)) { | |
1513 | printf("\n"); | |
1514 | break; | |
1515 | } | |
1516 | } | |
1517 | #endif | |
1da177e4 LT |
1518 | printf("pc = "); |
1519 | xmon_print_symbol(fp->nip, " ", "\n"); | |
48404f2e PM |
1520 | if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
1521 | printf("cfar= "); | |
1522 | xmon_print_symbol(fp->orig_gpr3, " ", "\n"); | |
1523 | } | |
1da177e4 LT |
1524 | printf("lr = "); |
1525 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1526 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1527 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1528 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1529 | trap = TRAP(fp); |
1530 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1531 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1532 | } |
1533 | ||
9f1067c2 | 1534 | static void cacheflush(void) |
1da177e4 LT |
1535 | { |
1536 | int cmd; | |
1537 | unsigned long nflush; | |
1538 | ||
1539 | cmd = inchar(); | |
1540 | if (cmd != 'i') | |
1541 | termch = cmd; | |
1542 | scanhex((void *)&adrs); | |
1543 | if (termch != '\n') | |
1544 | termch = 0; | |
1545 | nflush = 1; | |
1546 | scanhex(&nflush); | |
1547 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1548 | if (setjmp(bus_error_jmp) == 0) { | |
1549 | catch_memory_errors = 1; | |
1550 | sync(); | |
1551 | ||
1552 | if (cmd != 'i') { | |
1553 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1554 | cflush((void *) adrs); | |
1555 | } else { | |
1556 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1557 | cinval((void *) adrs); | |
1558 | } | |
1559 | sync(); | |
1560 | /* wait a little while to see if we get a machine check */ | |
1561 | __delay(200); | |
1562 | } | |
1563 | catch_memory_errors = 0; | |
1564 | } | |
1565 | ||
9f1067c2 | 1566 | static unsigned long |
1da177e4 LT |
1567 | read_spr(int n) |
1568 | { | |
1569 | unsigned int instrs[2]; | |
1570 | unsigned long (*code)(void); | |
1da177e4 | 1571 | unsigned long ret = -1UL; |
548ccebc PM |
1572 | #ifdef CONFIG_PPC64 |
1573 | unsigned long opd[3]; | |
1da177e4 | 1574 | |
1da177e4 LT |
1575 | opd[0] = (unsigned long)instrs; |
1576 | opd[1] = 0; | |
1577 | opd[2] = 0; | |
548ccebc PM |
1578 | code = (unsigned long (*)(void)) opd; |
1579 | #else | |
1580 | code = (unsigned long (*)(void)) instrs; | |
1581 | #endif | |
1582 | ||
1583 | /* mfspr r3,n; blr */ | |
1584 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1585 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1586 | store_inst(instrs); |
1587 | store_inst(instrs+1); | |
1da177e4 LT |
1588 | |
1589 | if (setjmp(bus_error_jmp) == 0) { | |
1590 | catch_memory_errors = 1; | |
1591 | sync(); | |
1592 | ||
1593 | ret = code(); | |
1594 | ||
1595 | sync(); | |
1596 | /* wait a little while to see if we get a machine check */ | |
1597 | __delay(200); | |
1598 | n = size; | |
1599 | } | |
1600 | ||
1601 | return ret; | |
1602 | } | |
1603 | ||
9f1067c2 | 1604 | static void |
1da177e4 LT |
1605 | write_spr(int n, unsigned long val) |
1606 | { | |
1607 | unsigned int instrs[2]; | |
1608 | unsigned long (*code)(unsigned long); | |
548ccebc | 1609 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1610 | unsigned long opd[3]; |
1611 | ||
1da177e4 LT |
1612 | opd[0] = (unsigned long)instrs; |
1613 | opd[1] = 0; | |
1614 | opd[2] = 0; | |
548ccebc PM |
1615 | code = (unsigned long (*)(unsigned long)) opd; |
1616 | #else | |
1617 | code = (unsigned long (*)(unsigned long)) instrs; | |
1618 | #endif | |
1619 | ||
1620 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1621 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1622 | store_inst(instrs); |
1623 | store_inst(instrs+1); | |
1da177e4 LT |
1624 | |
1625 | if (setjmp(bus_error_jmp) == 0) { | |
1626 | catch_memory_errors = 1; | |
1627 | sync(); | |
1628 | ||
1629 | code(val); | |
1630 | ||
1631 | sync(); | |
1632 | /* wait a little while to see if we get a machine check */ | |
1633 | __delay(200); | |
1634 | n = size; | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | static unsigned long regno; | |
1639 | extern char exc_prolog; | |
1640 | extern char dec_exc; | |
1641 | ||
9f1067c2 | 1642 | static void super_regs(void) |
1da177e4 LT |
1643 | { |
1644 | int cmd; | |
1645 | unsigned long val; | |
1da177e4 LT |
1646 | |
1647 | cmd = skipbl(); | |
1648 | if (cmd == '\n') { | |
e3bc8049 | 1649 | unsigned long sp, toc; |
1da177e4 LT |
1650 | asm("mr %0,1" : "=r" (sp) :); |
1651 | asm("mr %0,2" : "=r" (toc) :); | |
1652 | ||
f78541dc PM |
1653 | printf("msr = "REG" sprg0= "REG"\n", |
1654 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1655 | printf("pvr = "REG" sprg1= "REG"\n", | |
e3bc8049 | 1656 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
f78541dc PM |
1657 | printf("dec = "REG" sprg2= "REG"\n", |
1658 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1659 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1660 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 LT |
1661 | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | scanhex(®no); | |
1666 | switch (cmd) { | |
1667 | case 'w': | |
1668 | val = read_spr(regno); | |
1669 | scanhex(&val); | |
1670 | write_spr(regno, val); | |
1671 | /* fall through */ | |
1672 | case 'r': | |
1673 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1674 | break; | |
1da177e4 LT |
1675 | } |
1676 | scannl(); | |
1677 | } | |
1678 | ||
1679 | /* | |
1680 | * Stuff for reading and writing memory safely | |
1681 | */ | |
9f1067c2 | 1682 | static int |
1da177e4 LT |
1683 | mread(unsigned long adrs, void *buf, int size) |
1684 | { | |
1685 | volatile int n; | |
1686 | char *p, *q; | |
1687 | ||
1688 | n = 0; | |
1689 | if (setjmp(bus_error_jmp) == 0) { | |
1690 | catch_memory_errors = 1; | |
1691 | sync(); | |
1692 | p = (char *)adrs; | |
1693 | q = (char *)buf; | |
1694 | switch (size) { | |
1695 | case 2: | |
f78541dc | 1696 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1697 | break; |
1698 | case 4: | |
f78541dc | 1699 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1700 | break; |
1701 | case 8: | |
f78541dc | 1702 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1703 | break; |
1704 | default: | |
1705 | for( ; n < size; ++n) { | |
1706 | *q++ = *p++; | |
1707 | sync(); | |
1708 | } | |
1709 | } | |
1710 | sync(); | |
1711 | /* wait a little while to see if we get a machine check */ | |
1712 | __delay(200); | |
1713 | n = size; | |
1714 | } | |
1715 | catch_memory_errors = 0; | |
1716 | return n; | |
1717 | } | |
1718 | ||
9f1067c2 | 1719 | static int |
1da177e4 LT |
1720 | mwrite(unsigned long adrs, void *buf, int size) |
1721 | { | |
1722 | volatile int n; | |
1723 | char *p, *q; | |
1724 | ||
1725 | n = 0; | |
1726 | if (setjmp(bus_error_jmp) == 0) { | |
1727 | catch_memory_errors = 1; | |
1728 | sync(); | |
1729 | p = (char *) adrs; | |
1730 | q = (char *) buf; | |
1731 | switch (size) { | |
1732 | case 2: | |
f78541dc | 1733 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1734 | break; |
1735 | case 4: | |
f78541dc | 1736 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1737 | break; |
1738 | case 8: | |
f78541dc | 1739 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1740 | break; |
1741 | default: | |
1742 | for ( ; n < size; ++n) { | |
1743 | *p++ = *q++; | |
1744 | sync(); | |
1745 | } | |
1746 | } | |
1747 | sync(); | |
1748 | /* wait a little while to see if we get a machine check */ | |
1749 | __delay(200); | |
1750 | n = size; | |
1751 | } else { | |
736256e4 | 1752 | printf("*** Error writing address "REG"\n", adrs + n); |
1da177e4 LT |
1753 | } |
1754 | catch_memory_errors = 0; | |
1755 | return n; | |
1756 | } | |
1757 | ||
1758 | static int fault_type; | |
f78541dc | 1759 | static int fault_except; |
1da177e4 LT |
1760 | static char *fault_chars[] = { "--", "**", "##" }; |
1761 | ||
f78541dc | 1762 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1763 | { |
f78541dc | 1764 | fault_except = TRAP(regs); |
1da177e4 LT |
1765 | switch (TRAP(regs)) { |
1766 | case 0x200: | |
1767 | fault_type = 0; | |
1768 | break; | |
1769 | case 0x300: | |
1770 | case 0x380: | |
1771 | fault_type = 1; | |
1772 | break; | |
1773 | default: | |
1774 | fault_type = 2; | |
1775 | } | |
1776 | ||
1777 | longjmp(bus_error_jmp, 1); | |
1778 | ||
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1783 | ||
9f1067c2 | 1784 | static void |
1da177e4 LT |
1785 | byterev(unsigned char *val, int size) |
1786 | { | |
1787 | int t; | |
1788 | ||
1789 | switch (size) { | |
1790 | case 2: | |
1791 | SWAP(val[0], val[1], t); | |
1792 | break; | |
1793 | case 4: | |
1794 | SWAP(val[0], val[3], t); | |
1795 | SWAP(val[1], val[2], t); | |
1796 | break; | |
1797 | case 8: /* is there really any use for this? */ | |
1798 | SWAP(val[0], val[7], t); | |
1799 | SWAP(val[1], val[6], t); | |
1800 | SWAP(val[2], val[5], t); | |
1801 | SWAP(val[3], val[4], t); | |
1802 | break; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | static int brev; | |
1807 | static int mnoread; | |
1808 | ||
e3bc8049 | 1809 | static char *memex_help_string = |
1da177e4 LT |
1810 | "Memory examine command usage:\n" |
1811 | "m [addr] [flags] examine/change memory\n" | |
1812 | " addr is optional. will start where left off.\n" | |
1813 | " flags may include chars from this set:\n" | |
1814 | " b modify by bytes (default)\n" | |
1815 | " w modify by words (2 byte)\n" | |
1816 | " l modify by longs (4 byte)\n" | |
1817 | " d modify by doubleword (8 byte)\n" | |
1818 | " r toggle reverse byte order mode\n" | |
1819 | " n do not read memory (for i/o spaces)\n" | |
1820 | " . ok to read (default)\n" | |
1821 | "NOTE: flags are saved as defaults\n" | |
1822 | ""; | |
1823 | ||
e3bc8049 | 1824 | static char *memex_subcmd_help_string = |
1da177e4 LT |
1825 | "Memory examine subcommands:\n" |
1826 | " hexval write this val to current location\n" | |
1827 | " 'string' write chars from string to this location\n" | |
1828 | " ' increment address\n" | |
1829 | " ^ decrement address\n" | |
1830 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1831 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1832 | " ` clear no-read flag\n" | |
1833 | " ; stay at this addr\n" | |
1834 | " v change to byte mode\n" | |
1835 | " w change to word (2 byte) mode\n" | |
1836 | " l change to long (4 byte) mode\n" | |
1837 | " u change to doubleword (8 byte) mode\n" | |
1838 | " m addr change current addr\n" | |
1839 | " n toggle no-read flag\n" | |
1840 | " r toggle byte reverse flag\n" | |
1841 | " < count back up count bytes\n" | |
1842 | " > count skip forward count bytes\n" | |
1843 | " x exit this mode\n" | |
1844 | ""; | |
1845 | ||
9f1067c2 | 1846 | static void |
1da177e4 LT |
1847 | memex(void) |
1848 | { | |
1849 | int cmd, inc, i, nslash; | |
1850 | unsigned long n; | |
1851 | unsigned char val[16]; | |
1852 | ||
1853 | scanhex((void *)&adrs); | |
1854 | cmd = skipbl(); | |
1855 | if (cmd == '?') { | |
1856 | printf(memex_help_string); | |
1857 | return; | |
1858 | } else { | |
1859 | termch = cmd; | |
1860 | } | |
1861 | last_cmd = "m\n"; | |
1862 | while ((cmd = skipbl()) != '\n') { | |
1863 | switch( cmd ){ | |
1864 | case 'b': size = 1; break; | |
1865 | case 'w': size = 2; break; | |
1866 | case 'l': size = 4; break; | |
1867 | case 'd': size = 8; break; | |
1868 | case 'r': brev = !brev; break; | |
1869 | case 'n': mnoread = 1; break; | |
1870 | case '.': mnoread = 0; break; | |
1871 | } | |
1872 | } | |
1873 | if( size <= 0 ) | |
1874 | size = 1; | |
1875 | else if( size > 8 ) | |
1876 | size = 8; | |
1877 | for(;;){ | |
1878 | if (!mnoread) | |
1879 | n = mread(adrs, val, size); | |
e1449ed9 | 1880 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1881 | if (!mnoread) { |
1882 | if (brev) | |
1883 | byterev(val, size); | |
1884 | putchar(' '); | |
1885 | for (i = 0; i < n; ++i) | |
1886 | printf("%.2x", val[i]); | |
1887 | for (; i < size; ++i) | |
1888 | printf("%s", fault_chars[fault_type]); | |
1889 | } | |
1890 | putchar(' '); | |
1891 | inc = size; | |
1892 | nslash = 0; | |
1893 | for(;;){ | |
1894 | if( scanhex(&n) ){ | |
1895 | for (i = 0; i < size; ++i) | |
1896 | val[i] = n >> (i * 8); | |
1897 | if (!brev) | |
1898 | byterev(val, size); | |
1899 | mwrite(adrs, val, size); | |
1900 | inc = size; | |
1901 | } | |
1902 | cmd = skipbl(); | |
1903 | if (cmd == '\n') | |
1904 | break; | |
1905 | inc = 0; | |
1906 | switch (cmd) { | |
1907 | case '\'': | |
1908 | for(;;){ | |
1909 | n = inchar(); | |
1910 | if( n == '\\' ) | |
1911 | n = bsesc(); | |
1912 | else if( n == '\'' ) | |
1913 | break; | |
1914 | for (i = 0; i < size; ++i) | |
1915 | val[i] = n >> (i * 8); | |
1916 | if (!brev) | |
1917 | byterev(val, size); | |
1918 | mwrite(adrs, val, size); | |
1919 | adrs += size; | |
1920 | } | |
1921 | adrs -= size; | |
1922 | inc = size; | |
1923 | break; | |
1924 | case ',': | |
1925 | adrs += size; | |
1926 | break; | |
1927 | case '.': | |
1928 | mnoread = 0; | |
1929 | break; | |
1930 | case ';': | |
1931 | break; | |
1932 | case 'x': | |
1933 | case EOF: | |
1934 | scannl(); | |
1935 | return; | |
1936 | case 'b': | |
1937 | case 'v': | |
1938 | size = 1; | |
1939 | break; | |
1940 | case 'w': | |
1941 | size = 2; | |
1942 | break; | |
1943 | case 'l': | |
1944 | size = 4; | |
1945 | break; | |
1946 | case 'u': | |
1947 | size = 8; | |
1948 | break; | |
1949 | case '^': | |
1950 | adrs -= size; | |
1951 | break; | |
1952 | break; | |
1953 | case '/': | |
1954 | if (nslash > 0) | |
1955 | adrs -= 1 << nslash; | |
1956 | else | |
1957 | nslash = 0; | |
1958 | nslash += 4; | |
1959 | adrs += 1 << nslash; | |
1960 | break; | |
1961 | case '\\': | |
1962 | if (nslash < 0) | |
1963 | adrs += 1 << -nslash; | |
1964 | else | |
1965 | nslash = 0; | |
1966 | nslash -= 4; | |
1967 | adrs -= 1 << -nslash; | |
1968 | break; | |
1969 | case 'm': | |
1970 | scanhex((void *)&adrs); | |
1971 | break; | |
1972 | case 'n': | |
1973 | mnoread = 1; | |
1974 | break; | |
1975 | case 'r': | |
1976 | brev = !brev; | |
1977 | break; | |
1978 | case '<': | |
1979 | n = size; | |
1980 | scanhex(&n); | |
1981 | adrs -= n; | |
1982 | break; | |
1983 | case '>': | |
1984 | n = size; | |
1985 | scanhex(&n); | |
1986 | adrs += n; | |
1987 | break; | |
1988 | case '?': | |
1989 | printf(memex_subcmd_help_string); | |
1990 | break; | |
1991 | } | |
1992 | } | |
1993 | adrs += inc; | |
1994 | } | |
1995 | } | |
1996 | ||
9f1067c2 | 1997 | static int |
1da177e4 LT |
1998 | bsesc(void) |
1999 | { | |
2000 | int c; | |
2001 | ||
2002 | c = inchar(); | |
2003 | switch( c ){ | |
2004 | case 'n': c = '\n'; break; | |
2005 | case 'r': c = '\r'; break; | |
2006 | case 'b': c = '\b'; break; | |
2007 | case 't': c = '\t'; break; | |
2008 | } | |
2009 | return c; | |
2010 | } | |
2011 | ||
7e5b5938 OH |
2012 | static void xmon_rawdump (unsigned long adrs, long ndump) |
2013 | { | |
2014 | long n, m, r, nr; | |
2015 | unsigned char temp[16]; | |
2016 | ||
2017 | for (n = ndump; n > 0;) { | |
2018 | r = n < 16? n: 16; | |
2019 | nr = mread(adrs, temp, r); | |
2020 | adrs += nr; | |
2021 | for (m = 0; m < r; ++m) { | |
2022 | if (m < nr) | |
2023 | printf("%.2x", temp[m]); | |
2024 | else | |
2025 | printf("%s", fault_chars[fault_type]); | |
2026 | } | |
2027 | n -= r; | |
2028 | if (nr < r) | |
2029 | break; | |
2030 | } | |
2031 | printf("\n"); | |
2032 | } | |
2033 | ||
ddadb6b8 ME |
2034 | #ifdef CONFIG_PPC64 |
2035 | static void dump_one_paca(int cpu) | |
2036 | { | |
2037 | struct paca_struct *p; | |
2038 | ||
2039 | if (setjmp(bus_error_jmp) != 0) { | |
2040 | printf("*** Error dumping paca for cpu 0x%x!\n", cpu); | |
2041 | return; | |
2042 | } | |
2043 | ||
2044 | catch_memory_errors = 1; | |
2045 | sync(); | |
2046 | ||
2047 | p = &paca[cpu]; | |
2048 | ||
2049 | printf("paca for cpu 0x%x @ %p:\n", cpu, p); | |
2050 | ||
2051 | printf(" %-*s = %s\n", 16, "possible", cpu_possible(cpu) ? "yes" : "no"); | |
2052 | printf(" %-*s = %s\n", 16, "present", cpu_present(cpu) ? "yes" : "no"); | |
2053 | printf(" %-*s = %s\n", 16, "online", cpu_online(cpu) ? "yes" : "no"); | |
2054 | ||
2055 | #define DUMP(paca, name, format) \ | |
2056 | printf(" %-*s = %#-*"format"\t(0x%lx)\n", 16, #name, 18, paca->name, \ | |
2057 | offsetof(struct paca_struct, name)); | |
2058 | ||
2059 | DUMP(p, lock_token, "x"); | |
2060 | DUMP(p, paca_index, "x"); | |
2061 | DUMP(p, kernel_toc, "lx"); | |
2062 | DUMP(p, kernelbase, "lx"); | |
2063 | DUMP(p, kernel_msr, "lx"); | |
ddadb6b8 | 2064 | DUMP(p, emergency_sp, "p"); |
729b0f71 MS |
2065 | #ifdef CONFIG_PPC_BOOK3S_64 |
2066 | DUMP(p, mc_emergency_sp, "p"); | |
2067 | DUMP(p, in_mce, "x"); | |
2068 | #endif | |
ddadb6b8 ME |
2069 | DUMP(p, data_offset, "lx"); |
2070 | DUMP(p, hw_cpu_id, "x"); | |
2071 | DUMP(p, cpu_start, "x"); | |
2072 | DUMP(p, kexec_state, "x"); | |
2073 | DUMP(p, __current, "p"); | |
2074 | DUMP(p, kstack, "lx"); | |
2075 | DUMP(p, stab_rr, "lx"); | |
2076 | DUMP(p, saved_r1, "lx"); | |
2077 | DUMP(p, trap_save, "x"); | |
2078 | DUMP(p, soft_enabled, "x"); | |
2079 | DUMP(p, irq_happened, "x"); | |
2080 | DUMP(p, io_sync, "x"); | |
2081 | DUMP(p, irq_work_pending, "x"); | |
2082 | DUMP(p, nap_state_lost, "x"); | |
2083 | ||
2084 | #undef DUMP | |
2085 | ||
2086 | catch_memory_errors = 0; | |
2087 | sync(); | |
2088 | } | |
2089 | ||
2090 | static void dump_all_pacas(void) | |
2091 | { | |
2092 | int cpu; | |
2093 | ||
2094 | if (num_possible_cpus() == 0) { | |
2095 | printf("No possible cpus, use 'dp #' to dump individual cpus\n"); | |
2096 | return; | |
2097 | } | |
2098 | ||
2099 | for_each_possible_cpu(cpu) | |
2100 | dump_one_paca(cpu); | |
2101 | } | |
2102 | ||
2103 | static void dump_pacas(void) | |
2104 | { | |
2105 | unsigned long num; | |
2106 | int c; | |
2107 | ||
2108 | c = inchar(); | |
2109 | if (c == 'a') { | |
2110 | dump_all_pacas(); | |
2111 | return; | |
2112 | } | |
2113 | ||
2114 | termch = c; /* Put c back, it wasn't 'a' */ | |
2115 | ||
2116 | if (scanhex(&num)) | |
2117 | dump_one_paca(num); | |
2118 | else | |
2119 | dump_one_paca(xmon_owner); | |
2120 | } | |
2121 | #endif | |
2122 | ||
1da177e4 LT |
2123 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
2124 | || ('a' <= (c) && (c) <= 'f') \ | |
2125 | || ('A' <= (c) && (c) <= 'F')) | |
9f1067c2 | 2126 | static void |
1da177e4 LT |
2127 | dump(void) |
2128 | { | |
2129 | int c; | |
2130 | ||
2131 | c = inchar(); | |
ddadb6b8 ME |
2132 | |
2133 | #ifdef CONFIG_PPC64 | |
2134 | if (c == 'p') { | |
2135 | dump_pacas(); | |
2136 | return; | |
2137 | } | |
2138 | #endif | |
2139 | ||
1da177e4 LT |
2140 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
2141 | termch = c; | |
2142 | scanhex((void *)&adrs); | |
2143 | if (termch != '\n') | |
2144 | termch = 0; | |
2145 | if (c == 'i') { | |
2146 | scanhex(&nidump); | |
2147 | if (nidump == 0) | |
2148 | nidump = 16; | |
2149 | else if (nidump > MAX_DUMP) | |
2150 | nidump = MAX_DUMP; | |
2151 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
2152 | last_cmd = "di\n"; | |
f312deb4 VS |
2153 | } else if (c == 'l') { |
2154 | dump_log_buf(); | |
7e5b5938 OH |
2155 | } else if (c == 'r') { |
2156 | scanhex(&ndump); | |
2157 | if (ndump == 0) | |
2158 | ndump = 64; | |
2159 | xmon_rawdump(adrs, ndump); | |
2160 | adrs += ndump; | |
2161 | last_cmd = "dr\n"; | |
1da177e4 LT |
2162 | } else { |
2163 | scanhex(&ndump); | |
2164 | if (ndump == 0) | |
2165 | ndump = 64; | |
2166 | else if (ndump > MAX_DUMP) | |
2167 | ndump = MAX_DUMP; | |
2168 | prdump(adrs, ndump); | |
2169 | adrs += ndump; | |
2170 | last_cmd = "d\n"; | |
2171 | } | |
2172 | } | |
2173 | ||
9f1067c2 | 2174 | static void |
1da177e4 LT |
2175 | prdump(unsigned long adrs, long ndump) |
2176 | { | |
2177 | long n, m, c, r, nr; | |
2178 | unsigned char temp[16]; | |
2179 | ||
2180 | for (n = ndump; n > 0;) { | |
f78541dc | 2181 | printf(REG, adrs); |
1da177e4 LT |
2182 | putchar(' '); |
2183 | r = n < 16? n: 16; | |
2184 | nr = mread(adrs, temp, r); | |
2185 | adrs += nr; | |
2186 | for (m = 0; m < r; ++m) { | |
e3bc8049 | 2187 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
e1449ed9 | 2188 | putchar(' '); |
1da177e4 LT |
2189 | if (m < nr) |
2190 | printf("%.2x", temp[m]); | |
2191 | else | |
2192 | printf("%s", fault_chars[fault_type]); | |
2193 | } | |
e1449ed9 | 2194 | for (; m < 16; ++m) { |
e3bc8049 | 2195 | if ((m & (sizeof(long) - 1)) == 0) |
e1449ed9 | 2196 | putchar(' '); |
1da177e4 | 2197 | printf(" "); |
e1449ed9 | 2198 | } |
1da177e4 LT |
2199 | printf(" |"); |
2200 | for (m = 0; m < r; ++m) { | |
2201 | if (m < nr) { | |
2202 | c = temp[m]; | |
2203 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2204 | } else | |
2205 | putchar(' '); | |
2206 | } | |
2207 | n -= r; | |
2208 | for (; m < 16; ++m) | |
2209 | putchar(' '); | |
2210 | printf("|\n"); | |
2211 | if (nr < r) | |
2212 | break; | |
2213 | } | |
2214 | } | |
2215 | ||
4c4c8723 ME |
2216 | typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
2217 | ||
9f1067c2 | 2218 | static int |
4c4c8723 ME |
2219 | generic_inst_dump(unsigned long adr, long count, int praddr, |
2220 | instruction_dump_func dump_func) | |
1da177e4 LT |
2221 | { |
2222 | int nr, dotted; | |
2223 | unsigned long first_adr; | |
2224 | unsigned long inst, last_inst = 0; | |
2225 | unsigned char val[4]; | |
2226 | ||
2227 | dotted = 0; | |
2228 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2229 | nr = mread(adr, val, 4); | |
2230 | if (nr == 0) { | |
2231 | if (praddr) { | |
2232 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2233 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2234 | } |
2235 | break; | |
2236 | } | |
2237 | inst = GETWORD(val); | |
2238 | if (adr > first_adr && inst == last_inst) { | |
2239 | if (!dotted) { | |
2240 | printf(" ...\n"); | |
2241 | dotted = 1; | |
2242 | } | |
2243 | continue; | |
2244 | } | |
2245 | dotted = 0; | |
2246 | last_inst = inst; | |
2247 | if (praddr) | |
f78541dc | 2248 | printf(REG" %.8x", adr, inst); |
1da177e4 | 2249 | printf("\t"); |
4c4c8723 | 2250 | dump_func(inst, adr); |
1da177e4 LT |
2251 | printf("\n"); |
2252 | } | |
2253 | return adr - first_adr; | |
2254 | } | |
2255 | ||
9f1067c2 | 2256 | static int |
4c4c8723 ME |
2257 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
2258 | { | |
2259 | return generic_inst_dump(adr, count, praddr, print_insn_powerpc); | |
2260 | } | |
2261 | ||
1da177e4 LT |
2262 | void |
2263 | print_address(unsigned long addr) | |
2264 | { | |
2265 | xmon_print_symbol(addr, "\t# ", ""); | |
2266 | } | |
2267 | ||
f312deb4 VS |
2268 | void |
2269 | dump_log_buf(void) | |
2270 | { | |
ca5dd395 ME |
2271 | struct kmsg_dumper dumper = { .active = 1 }; |
2272 | unsigned char buf[128]; | |
2273 | size_t len; | |
f312deb4 | 2274 | |
e3bc8049 | 2275 | if (setjmp(bus_error_jmp) != 0) { |
ca5dd395 | 2276 | printf("Error dumping printk buffer!\n"); |
e3bc8049 ME |
2277 | return; |
2278 | } | |
f312deb4 | 2279 | |
e3bc8049 ME |
2280 | catch_memory_errors = 1; |
2281 | sync(); | |
f312deb4 | 2282 | |
ca5dd395 ME |
2283 | kmsg_dump_rewind_nolock(&dumper); |
2284 | while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) { | |
2285 | buf[len] = '\0'; | |
2286 | printf("%s", buf); | |
2287 | } | |
f312deb4 | 2288 | |
e3bc8049 ME |
2289 | sync(); |
2290 | /* wait a little while to see if we get a machine check */ | |
2291 | __delay(200); | |
2292 | catch_memory_errors = 0; | |
f312deb4 | 2293 | } |
1da177e4 LT |
2294 | |
2295 | /* | |
2296 | * Memory operations - move, set, print differences | |
2297 | */ | |
2298 | static unsigned long mdest; /* destination address */ | |
2299 | static unsigned long msrc; /* source address */ | |
2300 | static unsigned long mval; /* byte value to set memory to */ | |
2301 | static unsigned long mcount; /* # bytes to affect */ | |
2302 | static unsigned long mdiffs; /* max # differences to print */ | |
2303 | ||
9f1067c2 | 2304 | static void |
1da177e4 LT |
2305 | memops(int cmd) |
2306 | { | |
2307 | scanhex((void *)&mdest); | |
2308 | if( termch != '\n' ) | |
2309 | termch = 0; | |
2310 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2311 | if( termch != '\n' ) | |
2312 | termch = 0; | |
2313 | scanhex((void *)&mcount); | |
2314 | switch( cmd ){ | |
2315 | case 'm': | |
2316 | memmove((void *)mdest, (void *)msrc, mcount); | |
2317 | break; | |
2318 | case 's': | |
2319 | memset((void *)mdest, mval, mcount); | |
2320 | break; | |
2321 | case 'd': | |
2322 | if( termch != '\n' ) | |
2323 | termch = 0; | |
2324 | scanhex((void *)&mdiffs); | |
2325 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2326 | break; | |
2327 | } | |
2328 | } | |
2329 | ||
9f1067c2 | 2330 | static void |
1da177e4 LT |
2331 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
2332 | { | |
2333 | unsigned n, prt; | |
2334 | ||
2335 | prt = 0; | |
2336 | for( n = nb; n > 0; --n ) | |
2337 | if( *p1++ != *p2++ ) | |
2338 | if( ++prt <= maxpr ) | |
2339 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2340 | p1[-1], p2 - 1, p2[-1]); | |
2341 | if( prt > maxpr ) | |
2342 | printf("Total of %d differences\n", prt); | |
2343 | } | |
2344 | ||
2345 | static unsigned mend; | |
2346 | static unsigned mask; | |
2347 | ||
9f1067c2 | 2348 | static void |
1da177e4 LT |
2349 | memlocate(void) |
2350 | { | |
2351 | unsigned a, n; | |
2352 | unsigned char val[4]; | |
2353 | ||
2354 | last_cmd = "ml"; | |
2355 | scanhex((void *)&mdest); | |
2356 | if (termch != '\n') { | |
2357 | termch = 0; | |
2358 | scanhex((void *)&mend); | |
2359 | if (termch != '\n') { | |
2360 | termch = 0; | |
2361 | scanhex((void *)&mval); | |
2362 | mask = ~0; | |
2363 | if (termch != '\n') termch = 0; | |
2364 | scanhex((void *)&mask); | |
2365 | } | |
2366 | } | |
2367 | n = 0; | |
2368 | for (a = mdest; a < mend; a += 4) { | |
2369 | if (mread(a, val, 4) == 4 | |
2370 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2371 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2372 | if (++n >= 10) | |
2373 | break; | |
2374 | } | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | static unsigned long mskip = 0x1000; | |
2379 | static unsigned long mlim = 0xffffffff; | |
2380 | ||
9f1067c2 | 2381 | static void |
1da177e4 LT |
2382 | memzcan(void) |
2383 | { | |
2384 | unsigned char v; | |
2385 | unsigned a; | |
2386 | int ok, ook; | |
2387 | ||
2388 | scanhex(&mdest); | |
2389 | if (termch != '\n') termch = 0; | |
2390 | scanhex(&mskip); | |
2391 | if (termch != '\n') termch = 0; | |
2392 | scanhex(&mlim); | |
2393 | ook = 0; | |
2394 | for (a = mdest; a < mlim; a += mskip) { | |
2395 | ok = mread(a, &v, 1); | |
2396 | if (ok && !ook) { | |
2397 | printf("%.8x .. ", a); | |
1da177e4 LT |
2398 | } else if (!ok && ook) |
2399 | printf("%.8x\n", a - mskip); | |
2400 | ook = ok; | |
2401 | if (a + mskip < a) | |
2402 | break; | |
2403 | } | |
2404 | if (ook) | |
2405 | printf("%.8x\n", a - mskip); | |
2406 | } | |
2407 | ||
9f1067c2 | 2408 | static void proccall(void) |
f78541dc PM |
2409 | { |
2410 | unsigned long args[8]; | |
2411 | unsigned long ret; | |
2412 | int i; | |
2413 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2414 | unsigned long, unsigned long, unsigned long, | |
2415 | unsigned long, unsigned long, unsigned long); | |
2416 | callfunc_t func; | |
2417 | ||
2418 | if (!scanhex(&adrs)) | |
2419 | return; | |
2420 | if (termch != '\n') | |
2421 | termch = 0; | |
2422 | for (i = 0; i < 8; ++i) | |
2423 | args[i] = 0; | |
2424 | for (i = 0; i < 8; ++i) { | |
2425 | if (!scanhex(&args[i]) || termch == '\n') | |
2426 | break; | |
2427 | termch = 0; | |
2428 | } | |
2429 | func = (callfunc_t) adrs; | |
2430 | ret = 0; | |
2431 | if (setjmp(bus_error_jmp) == 0) { | |
2432 | catch_memory_errors = 1; | |
2433 | sync(); | |
2434 | ret = func(args[0], args[1], args[2], args[3], | |
2435 | args[4], args[5], args[6], args[7]); | |
2436 | sync(); | |
736256e4 | 2437 | printf("return value is 0x%lx\n", ret); |
f78541dc PM |
2438 | } else { |
2439 | printf("*** %x exception occurred\n", fault_except); | |
2440 | } | |
2441 | catch_memory_errors = 0; | |
2442 | } | |
2443 | ||
1da177e4 LT |
2444 | /* Input scanning routines */ |
2445 | int | |
2446 | skipbl(void) | |
2447 | { | |
2448 | int c; | |
2449 | ||
2450 | if( termch != 0 ){ | |
2451 | c = termch; | |
2452 | termch = 0; | |
2453 | } else | |
2454 | c = inchar(); | |
2455 | while( c == ' ' || c == '\t' ) | |
2456 | c = inchar(); | |
2457 | return c; | |
2458 | } | |
2459 | ||
2460 | #define N_PTREGS 44 | |
2461 | static char *regnames[N_PTREGS] = { | |
2462 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2463 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2464 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2465 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2466 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2467 | #ifdef CONFIG_PPC64 | |
2468 | "softe", | |
2469 | #else | |
2470 | "mq", | |
2471 | #endif | |
1da177e4 LT |
2472 | "trap", "dar", "dsisr", "res" |
2473 | }; | |
2474 | ||
2475 | int | |
2476 | scanhex(unsigned long *vp) | |
2477 | { | |
2478 | int c, d; | |
2479 | unsigned long v; | |
2480 | ||
2481 | c = skipbl(); | |
2482 | if (c == '%') { | |
2483 | /* parse register name */ | |
2484 | char regname[8]; | |
2485 | int i; | |
2486 | ||
2487 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2488 | c = inchar(); | |
2489 | if (!isalnum(c)) { | |
2490 | termch = c; | |
2491 | break; | |
2492 | } | |
2493 | regname[i] = c; | |
2494 | } | |
2495 | regname[i] = 0; | |
2496 | for (i = 0; i < N_PTREGS; ++i) { | |
2497 | if (strcmp(regnames[i], regname) == 0) { | |
2498 | if (xmon_regs == NULL) { | |
2499 | printf("regs not available\n"); | |
2500 | return 0; | |
2501 | } | |
2502 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2503 | return 1; | |
2504 | } | |
2505 | } | |
2506 | printf("invalid register name '%%%s'\n", regname); | |
2507 | return 0; | |
2508 | } | |
2509 | ||
2510 | /* skip leading "0x" if any */ | |
2511 | ||
2512 | if (c == '0') { | |
2513 | c = inchar(); | |
2514 | if (c == 'x') { | |
2515 | c = inchar(); | |
2516 | } else { | |
2517 | d = hexdigit(c); | |
2518 | if (d == EOF) { | |
2519 | termch = c; | |
2520 | *vp = 0; | |
2521 | return 1; | |
2522 | } | |
2523 | } | |
2524 | } else if (c == '$') { | |
2525 | int i; | |
2526 | for (i=0; i<63; i++) { | |
2527 | c = inchar(); | |
2528 | if (isspace(c)) { | |
2529 | termch = c; | |
2530 | break; | |
2531 | } | |
2532 | tmpstr[i] = c; | |
2533 | } | |
2534 | tmpstr[i++] = 0; | |
6879dc13 BH |
2535 | *vp = 0; |
2536 | if (setjmp(bus_error_jmp) == 0) { | |
2537 | catch_memory_errors = 1; | |
2538 | sync(); | |
2539 | *vp = kallsyms_lookup_name(tmpstr); | |
2540 | sync(); | |
2541 | } | |
2542 | catch_memory_errors = 0; | |
1da177e4 LT |
2543 | if (!(*vp)) { |
2544 | printf("unknown symbol '%s'\n", tmpstr); | |
2545 | return 0; | |
2546 | } | |
2547 | return 1; | |
2548 | } | |
2549 | ||
2550 | d = hexdigit(c); | |
2551 | if (d == EOF) { | |
2552 | termch = c; | |
2553 | return 0; | |
2554 | } | |
2555 | v = 0; | |
2556 | do { | |
2557 | v = (v << 4) + d; | |
2558 | c = inchar(); | |
2559 | d = hexdigit(c); | |
2560 | } while (d != EOF); | |
2561 | termch = c; | |
2562 | *vp = v; | |
2563 | return 1; | |
2564 | } | |
2565 | ||
9f1067c2 | 2566 | static void |
1da177e4 LT |
2567 | scannl(void) |
2568 | { | |
2569 | int c; | |
2570 | ||
2571 | c = termch; | |
2572 | termch = 0; | |
2573 | while( c != '\n' ) | |
2574 | c = inchar(); | |
2575 | } | |
2576 | ||
9f1067c2 | 2577 | static int hexdigit(int c) |
1da177e4 LT |
2578 | { |
2579 | if( '0' <= c && c <= '9' ) | |
2580 | return c - '0'; | |
2581 | if( 'A' <= c && c <= 'F' ) | |
2582 | return c - ('A' - 10); | |
2583 | if( 'a' <= c && c <= 'f' ) | |
2584 | return c - ('a' - 10); | |
2585 | return EOF; | |
2586 | } | |
2587 | ||
2588 | void | |
2589 | getstring(char *s, int size) | |
2590 | { | |
2591 | int c; | |
2592 | ||
2593 | c = skipbl(); | |
2594 | do { | |
2595 | if( size > 1 ){ | |
2596 | *s++ = c; | |
2597 | --size; | |
2598 | } | |
2599 | c = inchar(); | |
2600 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2601 | termch = c; | |
2602 | *s = 0; | |
2603 | } | |
2604 | ||
2605 | static char line[256]; | |
2606 | static char *lineptr; | |
2607 | ||
9f1067c2 | 2608 | static void |
1da177e4 LT |
2609 | flush_input(void) |
2610 | { | |
2611 | lineptr = NULL; | |
2612 | } | |
2613 | ||
9f1067c2 | 2614 | static int |
1da177e4 LT |
2615 | inchar(void) |
2616 | { | |
2617 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2618 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2619 | lineptr = NULL; |
2620 | return EOF; | |
2621 | } | |
2622 | lineptr = line; | |
2623 | } | |
2624 | return *lineptr++; | |
2625 | } | |
2626 | ||
9f1067c2 | 2627 | static void |
1da177e4 LT |
2628 | take_input(char *str) |
2629 | { | |
2630 | lineptr = str; | |
2631 | } | |
2632 | ||
2633 | ||
2634 | static void | |
2635 | symbol_lookup(void) | |
2636 | { | |
2637 | int type = inchar(); | |
2638 | unsigned long addr; | |
2639 | static char tmp[64]; | |
2640 | ||
2641 | switch (type) { | |
2642 | case 'a': | |
2643 | if (scanhex(&addr)) | |
2644 | xmon_print_symbol(addr, ": ", "\n"); | |
2645 | termch = 0; | |
2646 | break; | |
2647 | case 's': | |
2648 | getstring(tmp, 64); | |
2649 | if (setjmp(bus_error_jmp) == 0) { | |
2650 | catch_memory_errors = 1; | |
2651 | sync(); | |
2652 | addr = kallsyms_lookup_name(tmp); | |
2653 | if (addr) | |
2654 | printf("%s: %lx\n", tmp, addr); | |
2655 | else | |
2656 | printf("Symbol '%s' not found.\n", tmp); | |
2657 | sync(); | |
2658 | } | |
2659 | catch_memory_errors = 0; | |
2660 | termch = 0; | |
2661 | break; | |
2662 | } | |
2663 | } | |
2664 | ||
2665 | ||
2666 | /* Print an address in numeric and symbolic form (if possible) */ | |
2667 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2668 | const char *after) | |
2669 | { | |
2670 | char *modname; | |
2671 | const char *name = NULL; | |
2672 | unsigned long offset, size; | |
2673 | ||
f78541dc | 2674 | printf(REG, address); |
1da177e4 LT |
2675 | if (setjmp(bus_error_jmp) == 0) { |
2676 | catch_memory_errors = 1; | |
2677 | sync(); | |
2678 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2679 | tmpstr); | |
2680 | sync(); | |
2681 | /* wait a little while to see if we get a machine check */ | |
2682 | __delay(200); | |
2683 | } | |
2684 | ||
2685 | catch_memory_errors = 0; | |
2686 | ||
2687 | if (name) { | |
2688 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2689 | if (modname) | |
2690 | printf(" [%s]", modname); | |
2691 | } | |
2692 | printf("%s", after); | |
2693 | } | |
2694 | ||
2d27cfd3 | 2695 | #ifdef CONFIG_PPC_BOOK3S_64 |
13b3d13b | 2696 | void dump_segments(void) |
1da177e4 LT |
2697 | { |
2698 | int i; | |
b3b9595f | 2699 | unsigned long esid,vsid,valid; |
2700 | unsigned long llp; | |
1da177e4 | 2701 | |
736256e4 | 2702 | printf("SLB contents of cpu 0x%x\n", smp_processor_id()); |
1da177e4 | 2703 | |
584f8b71 | 2704 | for (i = 0; i < mmu_slb_size; i++) { |
b3b9595f | 2705 | asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
2706 | asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); | |
2707 | valid = (esid & SLB_ESID_V); | |
2708 | if (valid | esid | vsid) { | |
2709 | printf("%02d %016lx %016lx", i, esid, vsid); | |
2710 | if (valid) { | |
2711 | llp = vsid & SLB_VSID_LLP; | |
2712 | if (vsid & SLB_VSID_B_1T) { | |
2713 | printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2714 | GET_ESID_1T(esid), | |
2715 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, | |
2716 | llp); | |
2717 | } else { | |
2718 | printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2719 | GET_ESID(esid), | |
2720 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, | |
2721 | llp); | |
2722 | } | |
2723 | } else | |
2724 | printf("\n"); | |
2725 | } | |
1da177e4 LT |
2726 | } |
2727 | } | |
f78541dc PM |
2728 | #endif |
2729 | ||
2730 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2731 | void dump_segments(void) | |
2732 | { | |
2733 | int i; | |
2734 | ||
2735 | printf("sr0-15 ="); | |
2736 | for (i = 0; i < 16; ++i) | |
2737 | printf(" %x", mfsrin(i)); | |
2738 | printf("\n"); | |
2739 | } | |
2740 | #endif | |
2741 | ||
5a8a1a28 BH |
2742 | #ifdef CONFIG_44x |
2743 | static void dump_tlb_44x(void) | |
2744 | { | |
2745 | int i; | |
2746 | ||
2747 | for (i = 0; i < PPC44x_TLB_SIZE; i++) { | |
2748 | unsigned long w0,w1,w2; | |
2749 | asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); | |
2750 | asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); | |
2751 | asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); | |
2752 | printf("[%02x] %08x %08x %08x ", i, w0, w1, w2); | |
2753 | if (w0 & PPC44x_TLB_VALID) { | |
2754 | printf("V %08x -> %01x%08x %c%c%c%c%c", | |
2755 | w0 & PPC44x_TLB_EPN_MASK, | |
2756 | w1 & PPC44x_TLB_ERPN_MASK, | |
2757 | w1 & PPC44x_TLB_RPN_MASK, | |
2758 | (w2 & PPC44x_TLB_W) ? 'W' : 'w', | |
2759 | (w2 & PPC44x_TLB_I) ? 'I' : 'i', | |
2760 | (w2 & PPC44x_TLB_M) ? 'M' : 'm', | |
2761 | (w2 & PPC44x_TLB_G) ? 'G' : 'g', | |
2762 | (w2 & PPC44x_TLB_E) ? 'E' : 'e'); | |
2763 | } | |
2764 | printf("\n"); | |
2765 | } | |
2766 | } | |
2767 | #endif /* CONFIG_44x */ | |
9f1067c2 | 2768 | |
03247157 BH |
2769 | #ifdef CONFIG_PPC_BOOK3E |
2770 | static void dump_tlb_book3e(void) | |
2771 | { | |
2772 | u32 mmucfg, pidmask, lpidmask; | |
2773 | u64 ramask; | |
2774 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | |
2775 | int mmu_version; | |
2776 | static const char *pgsz_names[] = { | |
2777 | " 1K", | |
2778 | " 2K", | |
2779 | " 4K", | |
2780 | " 8K", | |
2781 | " 16K", | |
2782 | " 32K", | |
2783 | " 64K", | |
2784 | "128K", | |
2785 | "256K", | |
2786 | "512K", | |
2787 | " 1M", | |
2788 | " 2M", | |
2789 | " 4M", | |
2790 | " 8M", | |
2791 | " 16M", | |
2792 | " 32M", | |
2793 | " 64M", | |
2794 | "128M", | |
2795 | "256M", | |
2796 | "512M", | |
2797 | " 1G", | |
2798 | " 2G", | |
2799 | " 4G", | |
2800 | " 8G", | |
2801 | " 16G", | |
2802 | " 32G", | |
2803 | " 64G", | |
2804 | "128G", | |
2805 | "256G", | |
2806 | "512G", | |
2807 | " 1T", | |
2808 | " 2T", | |
2809 | }; | |
2810 | ||
2811 | /* Gather some infos about the MMU */ | |
2812 | mmucfg = mfspr(SPRN_MMUCFG); | |
2813 | mmu_version = (mmucfg & 3) + 1; | |
2814 | ntlbs = ((mmucfg >> 2) & 3) + 1; | |
2815 | pidsz = ((mmucfg >> 6) & 0x1f) + 1; | |
2816 | lpidsz = (mmucfg >> 24) & 0xf; | |
2817 | rasz = (mmucfg >> 16) & 0x7f; | |
2818 | if ((mmu_version > 1) && (mmucfg & 0x10000)) | |
2819 | lrat = 1; | |
2820 | printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", | |
2821 | mmu_version, ntlbs, pidsz, lpidsz, rasz); | |
2822 | pidmask = (1ul << pidsz) - 1; | |
2823 | lpidmask = (1ul << lpidsz) - 1; | |
2824 | ramask = (1ull << rasz) - 1; | |
2825 | ||
2826 | for (tlb = 0; tlb < ntlbs; tlb++) { | |
2827 | u32 tlbcfg; | |
2828 | int nent, assoc, new_cc = 1; | |
2829 | printf("TLB %d:\n------\n", tlb); | |
2830 | switch(tlb) { | |
2831 | case 0: | |
2832 | tlbcfg = mfspr(SPRN_TLB0CFG); | |
2833 | break; | |
2834 | case 1: | |
2835 | tlbcfg = mfspr(SPRN_TLB1CFG); | |
2836 | break; | |
2837 | case 2: | |
2838 | tlbcfg = mfspr(SPRN_TLB2CFG); | |
2839 | break; | |
2840 | case 3: | |
2841 | tlbcfg = mfspr(SPRN_TLB3CFG); | |
2842 | break; | |
2843 | default: | |
2844 | printf("Unsupported TLB number !\n"); | |
2845 | continue; | |
2846 | } | |
2847 | nent = tlbcfg & 0xfff; | |
2848 | assoc = (tlbcfg >> 24) & 0xff; | |
2849 | for (i = 0; i < nent; i++) { | |
2850 | u32 mas0 = MAS0_TLBSEL(tlb); | |
2851 | u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); | |
2852 | u64 mas2 = 0; | |
2853 | u64 mas7_mas3; | |
2854 | int esel = i, cc = i; | |
2855 | ||
2856 | if (assoc != 0) { | |
2857 | cc = i / assoc; | |
2858 | esel = i % assoc; | |
2859 | mas2 = cc * 0x1000; | |
2860 | } | |
2861 | ||
2862 | mas0 |= MAS0_ESEL(esel); | |
2863 | mtspr(SPRN_MAS0, mas0); | |
2864 | mtspr(SPRN_MAS1, mas1); | |
2865 | mtspr(SPRN_MAS2, mas2); | |
2866 | asm volatile("tlbre 0,0,0" : : : "memory"); | |
2867 | mas1 = mfspr(SPRN_MAS1); | |
2868 | mas2 = mfspr(SPRN_MAS2); | |
2869 | mas7_mas3 = mfspr(SPRN_MAS7_MAS3); | |
2870 | if (assoc && (i % assoc) == 0) | |
2871 | new_cc = 1; | |
2872 | if (!(mas1 & MAS1_VALID)) | |
2873 | continue; | |
2874 | if (assoc == 0) | |
2875 | printf("%04x- ", i); | |
2876 | else if (new_cc) | |
2877 | printf("%04x-%c", cc, 'A' + esel); | |
2878 | else | |
2879 | printf(" |%c", 'A' + esel); | |
2880 | new_cc = 0; | |
2881 | printf(" %016llx %04x %s %c%c AS%c", | |
2882 | mas2 & ~0x3ffull, | |
2883 | (mas1 >> 16) & 0x3fff, | |
2884 | pgsz_names[(mas1 >> 7) & 0x1f], | |
2885 | mas1 & MAS1_IND ? 'I' : ' ', | |
2886 | mas1 & MAS1_IPROT ? 'P' : ' ', | |
2887 | mas1 & MAS1_TS ? '1' : '0'); | |
2888 | printf(" %c%c%c%c%c%c%c", | |
2889 | mas2 & MAS2_X0 ? 'a' : ' ', | |
2890 | mas2 & MAS2_X1 ? 'v' : ' ', | |
2891 | mas2 & MAS2_W ? 'w' : ' ', | |
2892 | mas2 & MAS2_I ? 'i' : ' ', | |
2893 | mas2 & MAS2_M ? 'm' : ' ', | |
2894 | mas2 & MAS2_G ? 'g' : ' ', | |
2895 | mas2 & MAS2_E ? 'e' : ' '); | |
2896 | printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); | |
2897 | if (mas1 & MAS1_IND) | |
2898 | printf(" %s\n", | |
2899 | pgsz_names[(mas7_mas3 >> 1) & 0x1f]); | |
2900 | else | |
2901 | printf(" U%c%c%c S%c%c%c\n", | |
2902 | mas7_mas3 & MAS3_UX ? 'x' : ' ', | |
2903 | mas7_mas3 & MAS3_UW ? 'w' : ' ', | |
2904 | mas7_mas3 & MAS3_UR ? 'r' : ' ', | |
2905 | mas7_mas3 & MAS3_SX ? 'x' : ' ', | |
2906 | mas7_mas3 & MAS3_SW ? 'w' : ' ', | |
2907 | mas7_mas3 & MAS3_SR ? 'r' : ' '); | |
2908 | } | |
2909 | } | |
2910 | } | |
2911 | #endif /* CONFIG_PPC_BOOK3E */ | |
2912 | ||
9f1067c2 | 2913 | static void xmon_init(int enable) |
b13cfd17 OH |
2914 | { |
2915 | if (enable) { | |
2916 | __debugger = xmon; | |
2917 | __debugger_ipi = xmon_ipi; | |
2918 | __debugger_bpt = xmon_bpt; | |
2919 | __debugger_sstep = xmon_sstep; | |
2920 | __debugger_iabr_match = xmon_iabr_match; | |
9422de3e | 2921 | __debugger_break_match = xmon_break_match; |
b13cfd17 OH |
2922 | __debugger_fault_handler = xmon_fault_handler; |
2923 | } else { | |
2924 | __debugger = NULL; | |
2925 | __debugger_ipi = NULL; | |
2926 | __debugger_bpt = NULL; | |
2927 | __debugger_sstep = NULL; | |
2928 | __debugger_iabr_match = NULL; | |
9422de3e | 2929 | __debugger_break_match = NULL; |
b13cfd17 OH |
2930 | __debugger_fault_handler = NULL; |
2931 | } | |
1da177e4 | 2932 | } |
fca5dcd4 PM |
2933 | |
2934 | #ifdef CONFIG_MAGIC_SYSRQ | |
1495cc9d | 2935 | static void sysrq_handle_xmon(int key) |
fca5dcd4 PM |
2936 | { |
2937 | /* ensure xmon is enabled */ | |
2938 | xmon_init(1); | |
7d12e780 | 2939 | debugger(get_irq_regs()); |
fca5dcd4 PM |
2940 | } |
2941 | ||
1495cc9d | 2942 | static struct sysrq_key_op sysrq_xmon_op = { |
fca5dcd4 | 2943 | .handler = sysrq_handle_xmon, |
90a102e5 | 2944 | .help_msg = "xmon(x)", |
fca5dcd4 PM |
2945 | .action_msg = "Entering xmon", |
2946 | }; | |
2947 | ||
2948 | static int __init setup_xmon_sysrq(void) | |
2949 | { | |
2950 | register_sysrq_key('x', &sysrq_xmon_op); | |
2951 | return 0; | |
2952 | } | |
2953 | __initcall(setup_xmon_sysrq); | |
2954 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
47679283 | 2955 | |
f5e6a280 | 2956 | static int __initdata xmon_early, xmon_off; |
47679283 ME |
2957 | |
2958 | static int __init early_parse_xmon(char *p) | |
2959 | { | |
2960 | if (!p || strncmp(p, "early", 5) == 0) { | |
2961 | /* just "xmon" is equivalent to "xmon=early" */ | |
2962 | xmon_init(1); | |
2963 | xmon_early = 1; | |
2964 | } else if (strncmp(p, "on", 2) == 0) | |
2965 | xmon_init(1); | |
2966 | else if (strncmp(p, "off", 3) == 0) | |
2967 | xmon_off = 1; | |
2968 | else if (strncmp(p, "nobt", 4) == 0) | |
2969 | xmon_no_auto_backtrace = 1; | |
2970 | else | |
2971 | return 1; | |
2972 | ||
2973 | return 0; | |
2974 | } | |
2975 | early_param("xmon", early_parse_xmon); | |
2976 | ||
2977 | void __init xmon_setup(void) | |
2978 | { | |
2979 | #ifdef CONFIG_XMON_DEFAULT | |
2980 | if (!xmon_off) | |
2981 | xmon_init(1); | |
2982 | #endif | |
2983 | if (xmon_early) | |
2984 | debugger(NULL); | |
2985 | } | |
ff8a8f25 | 2986 | |
e055595d | 2987 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 ME |
2988 | |
2989 | struct spu_info { | |
2990 | struct spu *spu; | |
2991 | u64 saved_mfc_sr1_RW; | |
2992 | u32 saved_spu_runcntl_RW; | |
24a24c85 | 2993 | unsigned long dump_addr; |
ff8a8f25 ME |
2994 | u8 stopped_ok; |
2995 | }; | |
2996 | ||
2997 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ | |
2998 | ||
2999 | static struct spu_info spu_info[XMON_NUM_SPUS]; | |
3000 | ||
3001 | void xmon_register_spus(struct list_head *list) | |
3002 | { | |
3003 | struct spu *spu; | |
3004 | ||
3005 | list_for_each_entry(spu, list, full_list) { | |
3006 | if (spu->number >= XMON_NUM_SPUS) { | |
3007 | WARN_ON(1); | |
3008 | continue; | |
3009 | } | |
3010 | ||
3011 | spu_info[spu->number].spu = spu; | |
3012 | spu_info[spu->number].stopped_ok = 0; | |
24a24c85 ME |
3013 | spu_info[spu->number].dump_addr = (unsigned long) |
3014 | spu_info[spu->number].spu->local_store; | |
ff8a8f25 ME |
3015 | } |
3016 | } | |
3017 | ||
3018 | static void stop_spus(void) | |
3019 | { | |
3020 | struct spu *spu; | |
3021 | int i; | |
3022 | u64 tmp; | |
3023 | ||
3024 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3025 | if (!spu_info[i].spu) | |
3026 | continue; | |
3027 | ||
3028 | if (setjmp(bus_error_jmp) == 0) { | |
3029 | catch_memory_errors = 1; | |
3030 | sync(); | |
3031 | ||
3032 | spu = spu_info[i].spu; | |
3033 | ||
3034 | spu_info[i].saved_spu_runcntl_RW = | |
3035 | in_be32(&spu->problem->spu_runcntl_RW); | |
3036 | ||
3037 | tmp = spu_mfc_sr1_get(spu); | |
3038 | spu_info[i].saved_mfc_sr1_RW = tmp; | |
3039 | ||
3040 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; | |
3041 | spu_mfc_sr1_set(spu, tmp); | |
3042 | ||
3043 | sync(); | |
3044 | __delay(200); | |
3045 | ||
3046 | spu_info[i].stopped_ok = 1; | |
2a14442b ME |
3047 | |
3048 | printf("Stopped spu %.2d (was %s)\n", i, | |
3049 | spu_info[i].saved_spu_runcntl_RW ? | |
3050 | "running" : "stopped"); | |
ff8a8f25 ME |
3051 | } else { |
3052 | catch_memory_errors = 0; | |
3053 | printf("*** Error stopping spu %.2d\n", i); | |
3054 | } | |
3055 | catch_memory_errors = 0; | |
3056 | } | |
3057 | } | |
3058 | ||
3059 | static void restart_spus(void) | |
3060 | { | |
3061 | struct spu *spu; | |
3062 | int i; | |
3063 | ||
3064 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3065 | if (!spu_info[i].spu) | |
3066 | continue; | |
3067 | ||
3068 | if (!spu_info[i].stopped_ok) { | |
3069 | printf("*** Error, spu %d was not successfully stopped" | |
3070 | ", not restarting\n", i); | |
3071 | continue; | |
3072 | } | |
3073 | ||
3074 | if (setjmp(bus_error_jmp) == 0) { | |
3075 | catch_memory_errors = 1; | |
3076 | sync(); | |
3077 | ||
3078 | spu = spu_info[i].spu; | |
3079 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); | |
3080 | out_be32(&spu->problem->spu_runcntl_RW, | |
3081 | spu_info[i].saved_spu_runcntl_RW); | |
3082 | ||
3083 | sync(); | |
3084 | __delay(200); | |
3085 | ||
3086 | printf("Restarted spu %.2d\n", i); | |
3087 | } else { | |
3088 | catch_memory_errors = 0; | |
3089 | printf("*** Error restarting spu %.2d\n", i); | |
3090 | } | |
3091 | catch_memory_errors = 0; | |
3092 | } | |
3093 | } | |
3094 | ||
a8984970 | 3095 | #define DUMP_WIDTH 23 |
437a0706 | 3096 | #define DUMP_VALUE(format, field, value) \ |
a8984970 ME |
3097 | do { \ |
3098 | if (setjmp(bus_error_jmp) == 0) { \ | |
3099 | catch_memory_errors = 1; \ | |
3100 | sync(); \ | |
3101 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ | |
437a0706 | 3102 | #field, value); \ |
a8984970 ME |
3103 | sync(); \ |
3104 | __delay(200); \ | |
3105 | } else { \ | |
3106 | catch_memory_errors = 0; \ | |
3107 | printf(" %-*s = *** Error reading field.\n", \ | |
3108 | DUMP_WIDTH, #field); \ | |
3109 | } \ | |
3110 | catch_memory_errors = 0; \ | |
3111 | } while (0) | |
3112 | ||
437a0706 ME |
3113 | #define DUMP_FIELD(obj, format, field) \ |
3114 | DUMP_VALUE(format, field, obj->field) | |
3115 | ||
a8984970 ME |
3116 | static void dump_spu_fields(struct spu *spu) |
3117 | { | |
3118 | printf("Dumping spu fields at address %p:\n", spu); | |
3119 | ||
3120 | DUMP_FIELD(spu, "0x%x", number); | |
3121 | DUMP_FIELD(spu, "%s", name); | |
a8984970 ME |
3122 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
3123 | DUMP_FIELD(spu, "0x%p", local_store); | |
3124 | DUMP_FIELD(spu, "0x%lx", ls_size); | |
3125 | DUMP_FIELD(spu, "0x%x", node); | |
3126 | DUMP_FIELD(spu, "0x%lx", flags); | |
a8984970 | 3127 | DUMP_FIELD(spu, "%d", class_0_pending); |
f3d69e05 | 3128 | DUMP_FIELD(spu, "0x%lx", class_0_dar); |
f3d69e05 LB |
3129 | DUMP_FIELD(spu, "0x%lx", class_1_dar); |
3130 | DUMP_FIELD(spu, "0x%lx", class_1_dsisr); | |
a8984970 ME |
3131 | DUMP_FIELD(spu, "0x%lx", irqs[0]); |
3132 | DUMP_FIELD(spu, "0x%lx", irqs[1]); | |
3133 | DUMP_FIELD(spu, "0x%lx", irqs[2]); | |
3134 | DUMP_FIELD(spu, "0x%x", slb_replace); | |
3135 | DUMP_FIELD(spu, "%d", pid); | |
a8984970 ME |
3136 | DUMP_FIELD(spu, "0x%p", mm); |
3137 | DUMP_FIELD(spu, "0x%p", ctx); | |
3138 | DUMP_FIELD(spu, "0x%p", rq); | |
3139 | DUMP_FIELD(spu, "0x%p", timestamp); | |
3140 | DUMP_FIELD(spu, "0x%lx", problem_phys); | |
3141 | DUMP_FIELD(spu, "0x%p", problem); | |
437a0706 ME |
3142 | DUMP_VALUE("0x%x", problem->spu_runcntl_RW, |
3143 | in_be32(&spu->problem->spu_runcntl_RW)); | |
3144 | DUMP_VALUE("0x%x", problem->spu_status_R, | |
3145 | in_be32(&spu->problem->spu_status_R)); | |
3146 | DUMP_VALUE("0x%x", problem->spu_npc_RW, | |
3147 | in_be32(&spu->problem->spu_npc_RW)); | |
a8984970 | 3148 | DUMP_FIELD(spu, "0x%p", priv2); |
a985239b | 3149 | DUMP_FIELD(spu, "0x%p", pdata); |
a8984970 ME |
3150 | } |
3151 | ||
af89fb80 ME |
3152 | int |
3153 | spu_inst_dump(unsigned long adr, long count, int praddr) | |
3154 | { | |
3155 | return generic_inst_dump(adr, count, praddr, print_insn_spu); | |
3156 | } | |
3157 | ||
3158 | static void dump_spu_ls(unsigned long num, int subcmd) | |
24a24c85 ME |
3159 | { |
3160 | unsigned long offset, addr, ls_addr; | |
3161 | ||
3162 | if (setjmp(bus_error_jmp) == 0) { | |
3163 | catch_memory_errors = 1; | |
3164 | sync(); | |
3165 | ls_addr = (unsigned long)spu_info[num].spu->local_store; | |
3166 | sync(); | |
3167 | __delay(200); | |
3168 | } else { | |
3169 | catch_memory_errors = 0; | |
3170 | printf("*** Error: accessing spu info for spu %d\n", num); | |
3171 | return; | |
3172 | } | |
3173 | catch_memory_errors = 0; | |
3174 | ||
3175 | if (scanhex(&offset)) | |
3176 | addr = ls_addr + offset; | |
3177 | else | |
3178 | addr = spu_info[num].dump_addr; | |
3179 | ||
3180 | if (addr >= ls_addr + LS_SIZE) { | |
3181 | printf("*** Error: address outside of local store\n"); | |
3182 | return; | |
3183 | } | |
3184 | ||
af89fb80 ME |
3185 | switch (subcmd) { |
3186 | case 'i': | |
3187 | addr += spu_inst_dump(addr, 16, 1); | |
3188 | last_cmd = "sdi\n"; | |
3189 | break; | |
3190 | default: | |
3191 | prdump(addr, 64); | |
3192 | addr += 64; | |
3193 | last_cmd = "sd\n"; | |
3194 | break; | |
3195 | } | |
24a24c85 ME |
3196 | |
3197 | spu_info[num].dump_addr = addr; | |
3198 | } | |
3199 | ||
ff8a8f25 ME |
3200 | static int do_spu_cmd(void) |
3201 | { | |
24a24c85 | 3202 | static unsigned long num = 0; |
af89fb80 | 3203 | int cmd, subcmd = 0; |
ff8a8f25 ME |
3204 | |
3205 | cmd = inchar(); | |
3206 | switch (cmd) { | |
3207 | case 's': | |
3208 | stop_spus(); | |
3209 | break; | |
3210 | case 'r': | |
3211 | restart_spus(); | |
3212 | break; | |
24a24c85 | 3213 | case 'd': |
af89fb80 ME |
3214 | subcmd = inchar(); |
3215 | if (isxdigit(subcmd) || subcmd == '\n') | |
3216 | termch = subcmd; | |
3217 | case 'f': | |
24a24c85 ME |
3218 | scanhex(&num); |
3219 | if (num >= XMON_NUM_SPUS || !spu_info[num].spu) { | |
a8984970 | 3220 | printf("*** Error: invalid spu number\n"); |
24a24c85 ME |
3221 | return 0; |
3222 | } | |
3223 | ||
3224 | switch (cmd) { | |
3225 | case 'f': | |
3226 | dump_spu_fields(spu_info[num].spu); | |
3227 | break; | |
3228 | default: | |
af89fb80 | 3229 | dump_spu_ls(num, subcmd); |
24a24c85 ME |
3230 | break; |
3231 | } | |
3232 | ||
a8984970 | 3233 | break; |
ff8a8f25 ME |
3234 | default: |
3235 | return -1; | |
3236 | } | |
3237 | ||
3238 | return 0; | |
3239 | } | |
e055595d | 3240 | #else /* ! CONFIG_SPU_BASE */ |
ff8a8f25 ME |
3241 | static int do_spu_cmd(void) |
3242 | { | |
3243 | return -1; | |
3244 | } | |
3245 | #endif |