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 | 53 | |
1ad7d705 AK |
54 | #if defined(CONFIG_PPC_SPLPAR) |
55 | #include <asm/plpar_wrappers.h> | |
56 | #else | |
57 | static inline long plapr_set_ciabr(unsigned long ciabr) {return 0; }; | |
58 | #endif | |
59 | ||
1da177e4 | 60 | #include "nonstdio.h" |
e0426047 | 61 | #include "dis-asm.h" |
1da177e4 | 62 | |
1da177e4 | 63 | #ifdef CONFIG_SMP |
1c8950ff | 64 | static cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
1da177e4 LT |
65 | static unsigned long xmon_taken = 1; |
66 | static int xmon_owner; | |
67 | static int xmon_gate; | |
ddadb6b8 ME |
68 | #else |
69 | #define xmon_owner 0 | |
1da177e4 LT |
70 | #endif /* CONFIG_SMP */ |
71 | ||
5be3492f | 72 | static unsigned long in_xmon __read_mostly = 0; |
1da177e4 LT |
73 | |
74 | static unsigned long adrs; | |
75 | static int size = 1; | |
76 | #define MAX_DUMP (128 * 1024) | |
77 | static unsigned long ndump = 64; | |
78 | static unsigned long nidump = 16; | |
79 | static unsigned long ncsum = 4096; | |
80 | static int termch; | |
81 | static char tmpstr[128]; | |
82 | ||
1da177e4 LT |
83 | static long bus_error_jmp[JMP_BUF_LEN]; |
84 | static int catch_memory_errors; | |
85 | static long *xmon_fault_jmp[NR_CPUS]; | |
1da177e4 LT |
86 | |
87 | /* Breakpoint stuff */ | |
88 | struct bpt { | |
89 | unsigned long address; | |
90 | unsigned int instr[2]; | |
91 | atomic_t ref_count; | |
92 | int enabled; | |
93 | unsigned long pad; | |
94 | }; | |
95 | ||
96 | /* Bits in bpt.enabled */ | |
abb90ee7 ME |
97 | #define BP_CIABR 1 |
98 | #define BP_TRAP 2 | |
99 | #define BP_DABR 4 | |
1da177e4 LT |
100 | |
101 | #define NBPTS 256 | |
102 | static struct bpt bpts[NBPTS]; | |
103 | static struct bpt dabr; | |
104 | static struct bpt *iabr; | |
105 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
106 | ||
107 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
108 | ||
109 | /* Prototypes */ | |
110 | static int cmds(struct pt_regs *); | |
111 | static int mread(unsigned long, void *, int); | |
112 | static int mwrite(unsigned long, void *, int); | |
113 | static int handle_fault(struct pt_regs *); | |
114 | static void byterev(unsigned char *, int); | |
115 | static void memex(void); | |
116 | static int bsesc(void); | |
117 | static void dump(void); | |
118 | static void prdump(unsigned long, long); | |
119 | static int ppc_inst_dump(unsigned long, long, int); | |
f312deb4 | 120 | static void dump_log_buf(void); |
1da177e4 LT |
121 | static void backtrace(struct pt_regs *); |
122 | static void excprint(struct pt_regs *); | |
123 | static void prregs(struct pt_regs *); | |
124 | static void memops(int); | |
125 | static void memlocate(void); | |
126 | static void memzcan(void); | |
127 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
128 | int skipbl(void); | |
129 | int scanhex(unsigned long *valp); | |
130 | static void scannl(void); | |
131 | static int hexdigit(int); | |
132 | void getstring(char *, int); | |
133 | static void flush_input(void); | |
134 | static int inchar(void); | |
135 | static void take_input(char *); | |
136 | static unsigned long read_spr(int); | |
137 | static void write_spr(int, unsigned long); | |
138 | static void super_regs(void); | |
139 | static void remove_bpts(void); | |
140 | static void insert_bpts(void); | |
141 | static void remove_cpu_bpts(void); | |
142 | static void insert_cpu_bpts(void); | |
143 | static struct bpt *at_breakpoint(unsigned long pc); | |
144 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
145 | static int do_step(struct pt_regs *); | |
146 | static void bpt_cmds(void); | |
147 | static void cacheflush(void); | |
148 | static int cpu_cmd(void); | |
149 | static void csum(void); | |
150 | static void bootcmds(void); | |
f78541dc | 151 | static void proccall(void); |
1da177e4 LT |
152 | void dump_segments(void); |
153 | static void symbol_lookup(void); | |
26c8af5f OH |
154 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
155 | unsigned long pc); | |
1da177e4 LT |
156 | static void xmon_print_symbol(unsigned long address, const char *mid, |
157 | const char *after); | |
158 | static const char *getvecname(unsigned long vec); | |
159 | ||
ff8a8f25 ME |
160 | static int do_spu_cmd(void); |
161 | ||
5a8a1a28 BH |
162 | #ifdef CONFIG_44x |
163 | static void dump_tlb_44x(void); | |
164 | #endif | |
03247157 BH |
165 | #ifdef CONFIG_PPC_BOOK3E |
166 | static void dump_tlb_book3e(void); | |
167 | #endif | |
5a8a1a28 | 168 | |
9f1067c2 | 169 | static int xmon_no_auto_backtrace; |
26c8af5f | 170 | |
f78541dc PM |
171 | extern void xmon_enter(void); |
172 | extern void xmon_leave(void); | |
173 | ||
f78541dc PM |
174 | #ifdef CONFIG_PPC64 |
175 | #define REG "%.16lx" | |
f78541dc PM |
176 | #else |
177 | #define REG "%.8lx" | |
f78541dc | 178 | #endif |
1da177e4 | 179 | |
72eceef6 PB |
180 | #ifdef __LITTLE_ENDIAN__ |
181 | #define GETWORD(v) (((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0]) | |
182 | #else | |
1da177e4 | 183 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
72eceef6 | 184 | #endif |
1da177e4 LT |
185 | |
186 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
187 | || ('a' <= (c) && (c) <= 'f') \ | |
188 | || ('A' <= (c) && (c) <= 'F')) | |
189 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
190 | || ('a' <= (c) && (c) <= 'z') \ | |
191 | || ('A' <= (c) && (c) <= 'Z')) | |
192 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
193 | ||
194 | static char *help_string = "\ | |
195 | Commands:\n\ | |
196 | b show breakpoints\n\ | |
197 | bd set data breakpoint\n\ | |
198 | bi set instruction breakpoint\n\ | |
199 | bc clear breakpoint\n" | |
200 | #ifdef CONFIG_SMP | |
201 | "\ | |
202 | c print cpus stopped in xmon\n\ | |
203 | c# try to switch to cpu number h (in hex)\n" | |
204 | #endif | |
205 | "\ | |
206 | C checksum\n\ | |
207 | d dump bytes\n\ | |
208 | di dump instructions\n\ | |
209 | df dump float values\n\ | |
210 | dd dump double values\n\ | |
ddadb6b8 ME |
211 | dl dump the kernel log buffer\n" |
212 | #ifdef CONFIG_PPC64 | |
213 | "\ | |
214 | dp[#] dump paca for current cpu, or cpu #\n\ | |
215 | dpa dump paca for all possible cpus\n" | |
216 | #endif | |
217 | "\ | |
7e5b5938 | 218 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
219 | e print exception information\n\ |
220 | f flush cache\n\ | |
221 | la lookup symbol+offset of specified address\n\ | |
222 | ls lookup address of specified symbol\n\ | |
223 | m examine/change memory\n\ | |
224 | mm move a block of memory\n\ | |
225 | ms set a block of memory\n\ | |
226 | md compare two blocks of memory\n\ | |
227 | ml locate a block of memory\n\ | |
228 | mz zero a block of memory\n\ | |
229 | mi show information about memory allocation\n\ | |
f78541dc | 230 | p call a procedure\n\ |
1da177e4 | 231 | r print registers\n\ |
ff8a8f25 | 232 | s single step\n" |
e055595d | 233 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 | 234 | " ss stop execution on all spus\n\ |
a8984970 | 235 | sr restore execution on stopped spus\n\ |
24a24c85 | 236 | sf # dump spu fields for spu # (in hex)\n\ |
c99176a2 | 237 | sd # dump spu local store for spu # (in hex)\n\ |
af89fb80 | 238 | sdi # disassemble spu local store for spu # (in hex)\n" |
ff8a8f25 ME |
239 | #endif |
240 | " S print special registers\n\ | |
1da177e4 | 241 | t print backtrace\n\ |
1da177e4 | 242 | x exit monitor and recover\n\ |
f78541dc | 243 | X exit monitor and dont recover\n" |
79873e8d | 244 | #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) |
f78541dc | 245 | " u dump segment table or SLB\n" |
79873e8d | 246 | #elif defined(CONFIG_PPC_STD_MMU_32) |
f78541dc | 247 | " u dump segment registers\n" |
79873e8d | 248 | #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) |
5a8a1a28 BH |
249 | " u dump TLB\n" |
250 | #endif | |
f78541dc PM |
251 | " ? help\n" |
252 | " zr reboot\n\ | |
1da177e4 LT |
253 | zh halt\n" |
254 | ; | |
255 | ||
256 | static struct pt_regs *xmon_regs; | |
257 | ||
f78541dc | 258 | static inline void sync(void) |
1da177e4 LT |
259 | { |
260 | asm volatile("sync; isync"); | |
261 | } | |
262 | ||
f78541dc PM |
263 | static inline void store_inst(void *p) |
264 | { | |
265 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
266 | } | |
267 | ||
268 | static inline void cflush(void *p) | |
269 | { | |
270 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
271 | } | |
272 | ||
273 | static inline void cinval(void *p) | |
274 | { | |
275 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
276 | } | |
1da177e4 | 277 | |
1ad7d705 AK |
278 | /** |
279 | * write_ciabr() - write the CIABR SPR | |
280 | * @ciabr: The value to write. | |
281 | * | |
282 | * This function writes a value to the CIARB register either directly | |
283 | * through mtspr instruction if the kernel is in HV privilege mode or | |
284 | * call a hypervisor function to achieve the same in case the kernel | |
285 | * is in supervisor privilege mode. | |
286 | */ | |
287 | static void write_ciabr(unsigned long ciabr) | |
288 | { | |
289 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
290 | return; | |
291 | ||
292 | if (cpu_has_feature(CPU_FTR_HVMODE)) { | |
293 | mtspr(SPRN_CIABR, ciabr); | |
294 | return; | |
295 | } | |
296 | plapr_set_ciabr(ciabr); | |
297 | } | |
298 | ||
299 | /** | |
300 | * set_ciabr() - set the CIABR | |
301 | * @addr: The value to set. | |
302 | * | |
303 | * This function sets the correct privilege value into the the HW | |
304 | * breakpoint address before writing it up in the CIABR register. | |
305 | */ | |
306 | static void set_ciabr(unsigned long addr) | |
307 | { | |
308 | addr &= ~CIABR_PRIV; | |
309 | ||
310 | if (cpu_has_feature(CPU_FTR_HVMODE)) | |
311 | addr |= CIABR_PRIV_HYPER; | |
312 | else | |
313 | addr |= CIABR_PRIV_SUPER; | |
314 | write_ciabr(addr); | |
315 | } | |
316 | ||
1da177e4 LT |
317 | /* |
318 | * Disable surveillance (the service processor watchdog function) | |
319 | * while we are in xmon. | |
320 | * XXX we should re-enable it when we leave. :) | |
321 | */ | |
322 | #define SURVEILLANCE_TOKEN 9000 | |
323 | ||
324 | static inline void disable_surveillance(void) | |
325 | { | |
326 | #ifdef CONFIG_PPC_PSERIES | |
327 | /* Since this can't be a module, args should end up below 4GB. */ | |
328 | static struct rtas_args args; | |
329 | ||
330 | /* | |
331 | * At this point we have got all the cpus we can into | |
332 | * xmon, so there is hopefully no other cpu calling RTAS | |
333 | * at the moment, even though we don't take rtas.lock. | |
334 | * If we did try to take rtas.lock there would be a | |
335 | * real possibility of deadlock. | |
336 | */ | |
337 | args.token = rtas_token("set-indicator"); | |
338 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
339 | return; | |
e6eb2eba | 340 | args.token = cpu_to_be32(args.token); |
3b8a3c01 LD |
341 | args.nargs = cpu_to_be32(3); |
342 | args.nret = cpu_to_be32(1); | |
1da177e4 | 343 | args.rets = &args.args[3]; |
3b8a3c01 | 344 | args.args[0] = cpu_to_be32(SURVEILLANCE_TOKEN); |
1da177e4 LT |
345 | args.args[1] = 0; |
346 | args.args[2] = 0; | |
347 | enter_rtas(__pa(&args)); | |
348 | #endif /* CONFIG_PPC_PSERIES */ | |
349 | } | |
350 | ||
351 | #ifdef CONFIG_SMP | |
352 | static int xmon_speaker; | |
353 | ||
354 | static void get_output_lock(void) | |
355 | { | |
356 | int me = smp_processor_id() + 0x100; | |
357 | int last_speaker = 0, prev; | |
358 | long timeout; | |
359 | ||
360 | if (xmon_speaker == me) | |
361 | return; | |
730efb61 | 362 | |
1da177e4 | 363 | for (;;) { |
730efb61 ME |
364 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
365 | if (last_speaker == 0) | |
366 | return; | |
367 | ||
15075897 ME |
368 | /* |
369 | * Wait a full second for the lock, we might be on a slow | |
370 | * console, but check every 100us. | |
371 | */ | |
372 | timeout = 10000; | |
1da177e4 | 373 | while (xmon_speaker == last_speaker) { |
15075897 ME |
374 | if (--timeout > 0) { |
375 | udelay(100); | |
1da177e4 | 376 | continue; |
15075897 ME |
377 | } |
378 | ||
1da177e4 LT |
379 | /* hostile takeover */ |
380 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
381 | if (prev == last_speaker) | |
382 | return; | |
383 | break; | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | static void release_output_lock(void) | |
389 | { | |
390 | xmon_speaker = 0; | |
391 | } | |
1c8950ff ME |
392 | |
393 | int cpus_are_in_xmon(void) | |
394 | { | |
104699c0 | 395 | return !cpumask_empty(&cpus_in_xmon); |
1c8950ff | 396 | } |
1da177e4 LT |
397 | #endif |
398 | ||
daf8f403 JB |
399 | static inline int unrecoverable_excp(struct pt_regs *regs) |
400 | { | |
08f6d6ab | 401 | #if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E) |
66857b3a | 402 | /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */ |
daf8f403 JB |
403 | return 0; |
404 | #else | |
405 | return ((regs->msr & MSR_RI) == 0); | |
406 | #endif | |
407 | } | |
408 | ||
b0da9856 | 409 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
410 | { |
411 | int cmd = 0; | |
1da177e4 LT |
412 | struct bpt *bp; |
413 | long recurse_jmp[JMP_BUF_LEN]; | |
414 | unsigned long offset; | |
f13659e0 | 415 | unsigned long flags; |
1da177e4 LT |
416 | #ifdef CONFIG_SMP |
417 | int cpu; | |
418 | int secondary; | |
419 | unsigned long timeout; | |
420 | #endif | |
421 | ||
f13659e0 | 422 | local_irq_save(flags); |
a71d64b4 | 423 | hard_irq_disable(); |
1da177e4 LT |
424 | |
425 | bp = in_breakpoint_table(regs->nip, &offset); | |
426 | if (bp != NULL) { | |
427 | regs->nip = bp->address + offset; | |
428 | atomic_dec(&bp->ref_count); | |
429 | } | |
430 | ||
431 | remove_cpu_bpts(); | |
432 | ||
433 | #ifdef CONFIG_SMP | |
434 | cpu = smp_processor_id(); | |
104699c0 | 435 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
436 | get_output_lock(); |
437 | excprint(regs); | |
438 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
439 | "returning to main loop\n", | |
440 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 441 | release_output_lock(); |
1da177e4 LT |
442 | longjmp(xmon_fault_jmp[cpu], 1); |
443 | } | |
444 | ||
445 | if (setjmp(recurse_jmp) != 0) { | |
446 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 447 | get_output_lock(); |
1da177e4 LT |
448 | printf("xmon: WARNING: bad recursive fault " |
449 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 450 | release_output_lock(); |
1da177e4 LT |
451 | goto waiting; |
452 | } | |
453 | secondary = !(xmon_taken && cpu == xmon_owner); | |
454 | goto cmdloop; | |
455 | } | |
456 | ||
457 | xmon_fault_jmp[cpu] = recurse_jmp; | |
1da177e4 LT |
458 | |
459 | bp = NULL; | |
9f0b0793 | 460 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
1da177e4 | 461 | bp = at_breakpoint(regs->nip); |
daf8f403 | 462 | if (bp || unrecoverable_excp(regs)) |
1da177e4 LT |
463 | fromipi = 0; |
464 | ||
465 | if (!fromipi) { | |
466 | get_output_lock(); | |
467 | excprint(regs); | |
468 | if (bp) { | |
736256e4 | 469 | printf("cpu 0x%x stopped at breakpoint 0x%lx (", |
1da177e4 LT |
470 | cpu, BP_NUM(bp)); |
471 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
472 | } | |
daf8f403 | 473 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
474 | printf("WARNING: exception is not recoverable, " |
475 | "can't continue\n"); | |
476 | release_output_lock(); | |
477 | } | |
478 | ||
d2b496e5 ME |
479 | cpumask_set_cpu(cpu, &cpus_in_xmon); |
480 | ||
1da177e4 LT |
481 | waiting: |
482 | secondary = 1; | |
483 | while (secondary && !xmon_gate) { | |
484 | if (in_xmon == 0) { | |
485 | if (fromipi) | |
486 | goto leave; | |
487 | secondary = test_and_set_bit(0, &in_xmon); | |
488 | } | |
489 | barrier(); | |
490 | } | |
491 | ||
492 | if (!secondary && !xmon_gate) { | |
493 | /* we are the first cpu to come in */ | |
494 | /* interrupt other cpu(s) */ | |
495 | int ncpus = num_online_cpus(); | |
496 | ||
497 | xmon_owner = cpu; | |
498 | mb(); | |
499 | if (ncpus > 1) { | |
e0476371 | 500 | smp_send_debugger_break(); |
1da177e4 LT |
501 | /* wait for other cpus to come in */ |
502 | for (timeout = 100000000; timeout != 0; --timeout) { | |
104699c0 | 503 | if (cpumask_weight(&cpus_in_xmon) >= ncpus) |
1da177e4 LT |
504 | break; |
505 | barrier(); | |
506 | } | |
507 | } | |
508 | remove_bpts(); | |
509 | disable_surveillance(); | |
510 | /* for breakpoint or single step, print the current instr. */ | |
511 | if (bp || TRAP(regs) == 0xd00) | |
512 | ppc_inst_dump(regs->nip, 1, 0); | |
513 | printf("enter ? for help\n"); | |
514 | mb(); | |
515 | xmon_gate = 1; | |
516 | barrier(); | |
517 | } | |
518 | ||
519 | cmdloop: | |
520 | while (in_xmon) { | |
521 | if (secondary) { | |
522 | if (cpu == xmon_owner) { | |
523 | if (!test_and_set_bit(0, &xmon_taken)) { | |
524 | secondary = 0; | |
525 | continue; | |
526 | } | |
527 | /* missed it */ | |
528 | while (cpu == xmon_owner) | |
529 | barrier(); | |
530 | } | |
531 | barrier(); | |
532 | } else { | |
533 | cmd = cmds(regs); | |
534 | if (cmd != 0) { | |
535 | /* exiting xmon */ | |
536 | insert_bpts(); | |
537 | xmon_gate = 0; | |
538 | wmb(); | |
539 | in_xmon = 0; | |
540 | break; | |
541 | } | |
542 | /* have switched to some other cpu */ | |
543 | secondary = 1; | |
544 | } | |
545 | } | |
546 | leave: | |
104699c0 | 547 | cpumask_clear_cpu(cpu, &cpus_in_xmon); |
1da177e4 | 548 | xmon_fault_jmp[cpu] = NULL; |
1da177e4 LT |
549 | #else |
550 | /* UP is simple... */ | |
551 | if (in_xmon) { | |
552 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
553 | regs->trap, getvecname(TRAP(regs))); | |
554 | longjmp(xmon_fault_jmp[0], 1); | |
555 | } | |
556 | if (setjmp(recurse_jmp) == 0) { | |
557 | xmon_fault_jmp[0] = recurse_jmp; | |
558 | in_xmon = 1; | |
559 | ||
560 | excprint(regs); | |
561 | bp = at_breakpoint(regs->nip); | |
562 | if (bp) { | |
736256e4 | 563 | printf("Stopped at breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
564 | xmon_print_symbol(regs->nip, " ", ")\n"); |
565 | } | |
daf8f403 | 566 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
567 | printf("WARNING: exception is not recoverable, " |
568 | "can't continue\n"); | |
569 | remove_bpts(); | |
570 | disable_surveillance(); | |
571 | /* for breakpoint or single step, print the current instr. */ | |
572 | if (bp || TRAP(regs) == 0xd00) | |
573 | ppc_inst_dump(regs->nip, 1, 0); | |
574 | printf("enter ? for help\n"); | |
575 | } | |
576 | ||
577 | cmd = cmds(regs); | |
578 | ||
579 | insert_bpts(); | |
580 | in_xmon = 0; | |
581 | #endif | |
582 | ||
cdd3904d JB |
583 | #ifdef CONFIG_BOOKE |
584 | if (regs->msr & MSR_DE) { | |
585 | bp = at_breakpoint(regs->nip); | |
586 | if (bp != NULL) { | |
587 | regs->nip = (unsigned long) &bp->instr[0]; | |
588 | atomic_inc(&bp->ref_count); | |
589 | } | |
590 | } | |
591 | #else | |
9f0b0793 | 592 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
593 | bp = at_breakpoint(regs->nip); |
594 | if (bp != NULL) { | |
595 | int stepped = emulate_step(regs, bp->instr[0]); | |
596 | if (stepped == 0) { | |
597 | regs->nip = (unsigned long) &bp->instr[0]; | |
598 | atomic_inc(&bp->ref_count); | |
599 | } else if (stepped < 0) { | |
600 | printf("Couldn't single-step %s instruction\n", | |
601 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
602 | } | |
603 | } | |
604 | } | |
cdd3904d | 605 | #endif |
1da177e4 LT |
606 | insert_cpu_bpts(); |
607 | ||
a71d64b4 | 608 | touch_nmi_watchdog(); |
f13659e0 | 609 | local_irq_restore(flags); |
1da177e4 | 610 | |
0a730ae5 | 611 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
612 | } |
613 | ||
614 | int xmon(struct pt_regs *excp) | |
615 | { | |
616 | struct pt_regs regs; | |
617 | ||
618 | if (excp == NULL) { | |
322b4394 | 619 | ppc_save_regs(®s); |
1da177e4 LT |
620 | excp = ®s; |
621 | } | |
ff8a8f25 | 622 | |
1da177e4 LT |
623 | return xmon_core(excp, 0); |
624 | } | |
f78541dc PM |
625 | EXPORT_SYMBOL(xmon); |
626 | ||
f583ffce | 627 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
628 | { |
629 | unsigned long flags; | |
630 | local_irq_save(flags); | |
631 | printf("Keyboard interrupt\n"); | |
f583ffce | 632 | xmon(get_irq_regs()); |
f78541dc PM |
633 | local_irq_restore(flags); |
634 | return IRQ_HANDLED; | |
635 | } | |
1da177e4 | 636 | |
b0da9856 | 637 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
638 | { |
639 | struct bpt *bp; | |
640 | unsigned long offset; | |
641 | ||
9f0b0793 | 642 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 LT |
643 | return 0; |
644 | ||
645 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
646 | bp = in_breakpoint_table(regs->nip, &offset); | |
647 | if (bp != NULL && offset == 4) { | |
648 | regs->nip = bp->address + 4; | |
649 | atomic_dec(&bp->ref_count); | |
650 | return 1; | |
651 | } | |
652 | ||
653 | /* Are we at a breakpoint? */ | |
654 | bp = at_breakpoint(regs->nip); | |
655 | if (!bp) | |
656 | return 0; | |
657 | ||
658 | xmon_core(regs, 0); | |
659 | ||
660 | return 1; | |
661 | } | |
662 | ||
b0da9856 | 663 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
664 | { |
665 | if (user_mode(regs)) | |
666 | return 0; | |
667 | xmon_core(regs, 0); | |
668 | return 1; | |
669 | } | |
670 | ||
9422de3e | 671 | static int xmon_break_match(struct pt_regs *regs) |
1da177e4 | 672 | { |
9f0b0793 | 673 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 674 | return 0; |
fd9648df AB |
675 | if (dabr.enabled == 0) |
676 | return 0; | |
1da177e4 LT |
677 | xmon_core(regs, 0); |
678 | return 1; | |
679 | } | |
680 | ||
b0da9856 | 681 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 | 682 | { |
9f0b0793 | 683 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 684 | return 0; |
9f1067c2 | 685 | if (iabr == NULL) |
1da177e4 LT |
686 | return 0; |
687 | xmon_core(regs, 0); | |
688 | return 1; | |
689 | } | |
690 | ||
b0da9856 | 691 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
692 | { |
693 | #ifdef CONFIG_SMP | |
104699c0 | 694 | if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
1da177e4 LT |
695 | xmon_core(regs, 1); |
696 | #endif | |
697 | return 0; | |
698 | } | |
699 | ||
b0da9856 | 700 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
701 | { |
702 | struct bpt *bp; | |
703 | unsigned long offset; | |
704 | ||
705 | if (in_xmon && catch_memory_errors) | |
706 | handle_fault(regs); /* doesn't return */ | |
707 | ||
9f0b0793 | 708 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
709 | bp = in_breakpoint_table(regs->nip, &offset); |
710 | if (bp != NULL) { | |
711 | regs->nip = bp->address + offset; | |
712 | atomic_dec(&bp->ref_count); | |
713 | } | |
714 | } | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
1da177e4 LT |
719 | static struct bpt *at_breakpoint(unsigned long pc) |
720 | { | |
721 | int i; | |
722 | struct bpt *bp; | |
723 | ||
724 | bp = bpts; | |
725 | for (i = 0; i < NBPTS; ++i, ++bp) | |
726 | if (bp->enabled && pc == bp->address) | |
727 | return bp; | |
728 | return NULL; | |
729 | } | |
730 | ||
731 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
732 | { | |
733 | unsigned long off; | |
734 | ||
735 | off = nip - (unsigned long) bpts; | |
736 | if (off >= sizeof(bpts)) | |
737 | return NULL; | |
738 | off %= sizeof(struct bpt); | |
739 | if (off != offsetof(struct bpt, instr[0]) | |
740 | && off != offsetof(struct bpt, instr[1])) | |
741 | return NULL; | |
742 | *offp = off - offsetof(struct bpt, instr[0]); | |
743 | return (struct bpt *) (nip - off); | |
744 | } | |
745 | ||
746 | static struct bpt *new_breakpoint(unsigned long a) | |
747 | { | |
748 | struct bpt *bp; | |
749 | ||
750 | a &= ~3UL; | |
751 | bp = at_breakpoint(a); | |
752 | if (bp) | |
753 | return bp; | |
754 | ||
755 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
756 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
757 | bp->address = a; | |
758 | bp->instr[1] = bpinstr; | |
759 | store_inst(&bp->instr[1]); | |
760 | return bp; | |
761 | } | |
762 | } | |
763 | ||
764 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
765 | return NULL; | |
766 | } | |
767 | ||
768 | static void insert_bpts(void) | |
769 | { | |
770 | int i; | |
771 | struct bpt *bp; | |
772 | ||
773 | bp = bpts; | |
774 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 775 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0) |
1da177e4 LT |
776 | continue; |
777 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
778 | printf("Couldn't read instruction at %lx, " | |
779 | "disabling breakpoint there\n", bp->address); | |
780 | bp->enabled = 0; | |
781 | continue; | |
782 | } | |
783 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
784 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
785 | "instruction, disabling it\n", bp->address); | |
786 | bp->enabled = 0; | |
787 | continue; | |
788 | } | |
789 | store_inst(&bp->instr[0]); | |
abb90ee7 | 790 | if (bp->enabled & BP_CIABR) |
1da177e4 LT |
791 | continue; |
792 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
793 | printf("Couldn't write instruction at %lx, " | |
794 | "disabling breakpoint there\n", bp->address); | |
795 | bp->enabled &= ~BP_TRAP; | |
796 | continue; | |
797 | } | |
798 | store_inst((void *)bp->address); | |
799 | } | |
800 | } | |
801 | ||
802 | static void insert_cpu_bpts(void) | |
803 | { | |
9422de3e MN |
804 | struct arch_hw_breakpoint brk; |
805 | ||
806 | if (dabr.enabled) { | |
807 | brk.address = dabr.address; | |
808 | brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL; | |
809 | brk.len = 8; | |
21f58507 | 810 | __set_breakpoint(&brk); |
9422de3e | 811 | } |
1ad7d705 AK |
812 | |
813 | if (iabr) | |
814 | set_ciabr(iabr->address); | |
1da177e4 LT |
815 | } |
816 | ||
817 | static void remove_bpts(void) | |
818 | { | |
819 | int i; | |
820 | struct bpt *bp; | |
821 | unsigned instr; | |
822 | ||
823 | bp = bpts; | |
824 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 825 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) != BP_TRAP) |
1da177e4 LT |
826 | continue; |
827 | if (mread(bp->address, &instr, 4) == 4 | |
828 | && instr == bpinstr | |
829 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
830 | printf("Couldn't remove breakpoint at %lx\n", | |
831 | bp->address); | |
832 | else | |
833 | store_inst((void *)bp->address); | |
834 | } | |
835 | } | |
836 | ||
837 | static void remove_cpu_bpts(void) | |
838 | { | |
9422de3e | 839 | hw_breakpoint_disable(); |
1ad7d705 | 840 | write_ciabr(0); |
1da177e4 LT |
841 | } |
842 | ||
843 | /* Command interpreting routine */ | |
844 | static char *last_cmd; | |
845 | ||
846 | static int | |
847 | cmds(struct pt_regs *excp) | |
848 | { | |
849 | int cmd = 0; | |
850 | ||
851 | last_cmd = NULL; | |
852 | xmon_regs = excp; | |
26c8af5f OH |
853 | |
854 | if (!xmon_no_auto_backtrace) { | |
855 | xmon_no_auto_backtrace = 1; | |
856 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
857 | } | |
858 | ||
1da177e4 LT |
859 | for(;;) { |
860 | #ifdef CONFIG_SMP | |
861 | printf("%x:", smp_processor_id()); | |
862 | #endif /* CONFIG_SMP */ | |
863 | printf("mon> "); | |
1da177e4 LT |
864 | flush_input(); |
865 | termch = 0; | |
866 | cmd = skipbl(); | |
867 | if( cmd == '\n' ) { | |
868 | if (last_cmd == NULL) | |
869 | continue; | |
870 | take_input(last_cmd); | |
871 | last_cmd = NULL; | |
872 | cmd = inchar(); | |
873 | } | |
874 | switch (cmd) { | |
875 | case 'm': | |
876 | cmd = inchar(); | |
877 | switch (cmd) { | |
878 | case 'm': | |
879 | case 's': | |
880 | case 'd': | |
881 | memops(cmd); | |
882 | break; | |
883 | case 'l': | |
884 | memlocate(); | |
885 | break; | |
886 | case 'z': | |
887 | memzcan(); | |
888 | break; | |
889 | case 'i': | |
b2b755b5 | 890 | show_mem(0); |
1da177e4 LT |
891 | break; |
892 | default: | |
893 | termch = cmd; | |
894 | memex(); | |
895 | } | |
896 | break; | |
897 | case 'd': | |
898 | dump(); | |
899 | break; | |
900 | case 'l': | |
901 | symbol_lookup(); | |
902 | break; | |
903 | case 'r': | |
904 | prregs(excp); /* print regs */ | |
905 | break; | |
906 | case 'e': | |
907 | excprint(excp); | |
908 | break; | |
909 | case 'S': | |
910 | super_regs(); | |
911 | break; | |
912 | case 't': | |
913 | backtrace(excp); | |
914 | break; | |
915 | case 'f': | |
916 | cacheflush(); | |
917 | break; | |
918 | case 's': | |
ff8a8f25 ME |
919 | if (do_spu_cmd() == 0) |
920 | break; | |
1da177e4 LT |
921 | if (do_step(excp)) |
922 | return cmd; | |
923 | break; | |
924 | case 'x': | |
925 | case 'X': | |
bb6b9b28 | 926 | return cmd; |
1da177e4 | 927 | case EOF: |
bb6b9b28 BH |
928 | printf(" <no input ...>\n"); |
929 | mdelay(2000); | |
1da177e4 LT |
930 | return cmd; |
931 | case '?': | |
4d404edc | 932 | xmon_puts(help_string); |
1da177e4 | 933 | break; |
1da177e4 LT |
934 | case 'b': |
935 | bpt_cmds(); | |
936 | break; | |
937 | case 'C': | |
938 | csum(); | |
939 | break; | |
940 | case 'c': | |
941 | if (cpu_cmd()) | |
942 | return 0; | |
943 | break; | |
944 | case 'z': | |
945 | bootcmds(); | |
946 | break; | |
f78541dc PM |
947 | case 'p': |
948 | proccall(); | |
1da177e4 | 949 | break; |
f78541dc | 950 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
951 | case 'u': |
952 | dump_segments(); | |
953 | break; | |
d8ee6f34 | 954 | #elif defined(CONFIG_44x) |
5a8a1a28 BH |
955 | case 'u': |
956 | dump_tlb_44x(); | |
957 | break; | |
79873e8d | 958 | #elif defined(CONFIG_PPC_BOOK3E) |
03247157 BH |
959 | case 'u': |
960 | dump_tlb_book3e(); | |
961 | break; | |
f78541dc | 962 | #endif |
1da177e4 LT |
963 | default: |
964 | printf("Unrecognized command: "); | |
e3bc8049 | 965 | do { |
1da177e4 LT |
966 | if (' ' < cmd && cmd <= '~') |
967 | putchar(cmd); | |
968 | else | |
969 | printf("\\x%x", cmd); | |
970 | cmd = inchar(); | |
e3bc8049 | 971 | } while (cmd != '\n'); |
1da177e4 LT |
972 | printf(" (type ? for help)\n"); |
973 | break; | |
974 | } | |
975 | } | |
976 | } | |
977 | ||
cdd3904d JB |
978 | #ifdef CONFIG_BOOKE |
979 | static int do_step(struct pt_regs *regs) | |
980 | { | |
981 | regs->msr |= MSR_DE; | |
982 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
983 | return 1; | |
984 | } | |
985 | #else | |
1da177e4 LT |
986 | /* |
987 | * Step a single instruction. | |
988 | * Some instructions we emulate, others we execute with MSR_SE set. | |
989 | */ | |
990 | static int do_step(struct pt_regs *regs) | |
991 | { | |
992 | unsigned int instr; | |
993 | int stepped; | |
994 | ||
995 | /* check we are in 64-bit kernel mode, translation enabled */ | |
9f0b0793 | 996 | if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
1da177e4 LT |
997 | if (mread(regs->nip, &instr, 4) == 4) { |
998 | stepped = emulate_step(regs, instr); | |
999 | if (stepped < 0) { | |
1000 | printf("Couldn't single-step %s instruction\n", | |
1001 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
1002 | return 0; | |
1003 | } | |
1004 | if (stepped > 0) { | |
1005 | regs->trap = 0xd00 | (regs->trap & 1); | |
1006 | printf("stepped to "); | |
1007 | xmon_print_symbol(regs->nip, " ", "\n"); | |
1008 | ppc_inst_dump(regs->nip, 1, 0); | |
1009 | return 0; | |
1010 | } | |
1011 | } | |
1012 | } | |
1013 | regs->msr |= MSR_SE; | |
1014 | return 1; | |
1015 | } | |
cdd3904d | 1016 | #endif |
1da177e4 LT |
1017 | |
1018 | static void bootcmds(void) | |
1019 | { | |
1020 | int cmd; | |
1021 | ||
1022 | cmd = inchar(); | |
1023 | if (cmd == 'r') | |
1024 | ppc_md.restart(NULL); | |
1025 | else if (cmd == 'h') | |
1026 | ppc_md.halt(); | |
1027 | else if (cmd == 'p') | |
9178ba29 AG |
1028 | if (pm_power_off) |
1029 | pm_power_off(); | |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | static int cpu_cmd(void) | |
1033 | { | |
1034 | #ifdef CONFIG_SMP | |
fd3bb912 | 1035 | unsigned long cpu, first_cpu, last_cpu; |
1da177e4 | 1036 | int timeout; |
1da177e4 LT |
1037 | |
1038 | if (!scanhex(&cpu)) { | |
1039 | /* print cpus waiting or in xmon */ | |
1040 | printf("cpus stopped:"); | |
fd3bb912 | 1041 | last_cpu = first_cpu = NR_CPUS; |
bc1d7702 | 1042 | for_each_possible_cpu(cpu) { |
104699c0 | 1043 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
fd3bb912 PM |
1044 | if (cpu == last_cpu + 1) { |
1045 | last_cpu = cpu; | |
1046 | } else { | |
1047 | if (last_cpu != first_cpu) | |
736256e4 | 1048 | printf("-0x%lx", last_cpu); |
fd3bb912 | 1049 | last_cpu = first_cpu = cpu; |
736256e4 | 1050 | printf(" 0x%lx", cpu); |
fd3bb912 | 1051 | } |
1da177e4 LT |
1052 | } |
1053 | } | |
fd3bb912 | 1054 | if (last_cpu != first_cpu) |
736256e4 | 1055 | printf("-0x%lx", last_cpu); |
1da177e4 LT |
1056 | printf("\n"); |
1057 | return 0; | |
1058 | } | |
1059 | /* try to switch to cpu specified */ | |
104699c0 | 1060 | if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
1061 | printf("cpu 0x%x isn't in xmon\n", cpu); |
1062 | return 0; | |
1063 | } | |
1064 | xmon_taken = 0; | |
1065 | mb(); | |
1066 | xmon_owner = cpu; | |
1067 | timeout = 10000000; | |
1068 | while (!xmon_taken) { | |
1069 | if (--timeout == 0) { | |
1070 | if (test_and_set_bit(0, &xmon_taken)) | |
1071 | break; | |
1072 | /* take control back */ | |
1073 | mb(); | |
1074 | xmon_owner = smp_processor_id(); | |
736256e4 | 1075 | printf("cpu 0x%x didn't take control\n", cpu); |
1da177e4 LT |
1076 | return 0; |
1077 | } | |
1078 | barrier(); | |
1079 | } | |
1080 | return 1; | |
1081 | #else | |
1082 | return 0; | |
1083 | #endif /* CONFIG_SMP */ | |
1084 | } | |
1085 | ||
1086 | static unsigned short fcstab[256] = { | |
1087 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
1088 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
1089 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
1090 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
1091 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
1092 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
1093 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
1094 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
1095 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
1096 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
1097 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
1098 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
1099 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
1100 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
1101 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
1102 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
1103 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
1104 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
1105 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
1106 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
1107 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
1108 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1109 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1110 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1111 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1112 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1113 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1114 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1115 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1116 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1117 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1118 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1119 | }; | |
1120 | ||
1121 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1122 | ||
1123 | static void | |
1124 | csum(void) | |
1125 | { | |
1126 | unsigned int i; | |
1127 | unsigned short fcs; | |
1128 | unsigned char v; | |
1129 | ||
1130 | if (!scanhex(&adrs)) | |
1131 | return; | |
1132 | if (!scanhex(&ncsum)) | |
1133 | return; | |
1134 | fcs = 0xffff; | |
1135 | for (i = 0; i < ncsum; ++i) { | |
1136 | if (mread(adrs+i, &v, 1) == 0) { | |
736256e4 | 1137 | printf("csum stopped at "REG"\n", adrs+i); |
1da177e4 LT |
1138 | break; |
1139 | } | |
1140 | fcs = FCS(fcs, v); | |
1141 | } | |
1142 | printf("%x\n", fcs); | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Check if this is a suitable place to put a breakpoint. | |
1147 | */ | |
1148 | static long check_bp_loc(unsigned long addr) | |
1149 | { | |
1150 | unsigned int instr; | |
1151 | ||
1152 | addr &= ~3; | |
51fae6de | 1153 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1154 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1155 | return 0; | |
1156 | } | |
1157 | if (!mread(addr, &instr, sizeof(instr))) { | |
1158 | printf("Can't read instruction at address %lx\n", addr); | |
1159 | return 0; | |
1160 | } | |
1161 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1162 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1163 | "instructions\n"); | |
1164 | return 0; | |
1165 | } | |
1166 | return 1; | |
1167 | } | |
1168 | ||
e3bc8049 | 1169 | static char *breakpoint_help_string = |
1da177e4 LT |
1170 | "Breakpoint command usage:\n" |
1171 | "b show breakpoints\n" | |
1172 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1173 | "bc clear all breakpoints\n" | |
1174 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1ad7d705 | 1175 | "bi <addr> [cnt] set hardware instr breakpoint (POWER8 only)\n" |
1da177e4 LT |
1176 | "bd <addr> [cnt] set hardware data breakpoint\n" |
1177 | ""; | |
1178 | ||
1179 | static void | |
1180 | bpt_cmds(void) | |
1181 | { | |
1182 | int cmd; | |
1183 | unsigned long a; | |
1184 | int mode, i; | |
1185 | struct bpt *bp; | |
1186 | const char badaddr[] = "Only kernel addresses are permitted " | |
1187 | "for breakpoints\n"; | |
1188 | ||
1189 | cmd = inchar(); | |
1190 | switch (cmd) { | |
f78541dc | 1191 | #ifndef CONFIG_8xx |
1da177e4 LT |
1192 | case 'd': /* bd - hardware data breakpoint */ |
1193 | mode = 7; | |
1194 | cmd = inchar(); | |
1195 | if (cmd == 'r') | |
1196 | mode = 5; | |
1197 | else if (cmd == 'w') | |
1198 | mode = 6; | |
1199 | else | |
1200 | termch = cmd; | |
1201 | dabr.address = 0; | |
1202 | dabr.enabled = 0; | |
1203 | if (scanhex(&dabr.address)) { | |
51fae6de | 1204 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1205 | printf(badaddr); |
1206 | break; | |
1207 | } | |
9422de3e | 1208 | dabr.address &= ~HW_BRK_TYPE_DABR; |
1da177e4 LT |
1209 | dabr.enabled = mode | BP_DABR; |
1210 | } | |
1211 | break; | |
1212 | ||
1213 | case 'i': /* bi - hardware instr breakpoint */ | |
1ad7d705 | 1214 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { |
1da177e4 LT |
1215 | printf("Hardware instruction breakpoint " |
1216 | "not supported on this cpu\n"); | |
1217 | break; | |
1218 | } | |
1219 | if (iabr) { | |
abb90ee7 | 1220 | iabr->enabled &= ~BP_CIABR; |
1da177e4 LT |
1221 | iabr = NULL; |
1222 | } | |
1223 | if (!scanhex(&a)) | |
1224 | break; | |
1225 | if (!check_bp_loc(a)) | |
1226 | break; | |
1227 | bp = new_breakpoint(a); | |
1228 | if (bp != NULL) { | |
abb90ee7 | 1229 | bp->enabled |= BP_CIABR; |
1da177e4 LT |
1230 | iabr = bp; |
1231 | } | |
1232 | break; | |
f78541dc | 1233 | #endif |
1da177e4 LT |
1234 | |
1235 | case 'c': | |
1236 | if (!scanhex(&a)) { | |
1237 | /* clear all breakpoints */ | |
1238 | for (i = 0; i < NBPTS; ++i) | |
1239 | bpts[i].enabled = 0; | |
1240 | iabr = NULL; | |
1241 | dabr.enabled = 0; | |
1242 | printf("All breakpoints cleared\n"); | |
1243 | break; | |
1244 | } | |
1245 | ||
1246 | if (a <= NBPTS && a >= 1) { | |
1247 | /* assume a breakpoint number */ | |
1248 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1249 | } else { | |
1250 | /* assume a breakpoint address */ | |
1251 | bp = at_breakpoint(a); | |
9f1067c2 | 1252 | if (bp == NULL) { |
736256e4 | 1253 | printf("No breakpoint at %lx\n", a); |
1da177e4 LT |
1254 | break; |
1255 | } | |
1256 | } | |
1257 | ||
736256e4 | 1258 | printf("Cleared breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
1259 | xmon_print_symbol(bp->address, " ", ")\n"); |
1260 | bp->enabled = 0; | |
1261 | break; | |
1262 | ||
1263 | default: | |
1264 | termch = cmd; | |
e3bc8049 | 1265 | cmd = skipbl(); |
1da177e4 LT |
1266 | if (cmd == '?') { |
1267 | printf(breakpoint_help_string); | |
1268 | break; | |
1269 | } | |
1270 | termch = cmd; | |
1271 | if (!scanhex(&a)) { | |
1272 | /* print all breakpoints */ | |
1273 | printf(" type address\n"); | |
1274 | if (dabr.enabled) { | |
f78541dc | 1275 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1276 | if (dabr.enabled & 1) |
1277 | printf("r"); | |
1278 | if (dabr.enabled & 2) | |
1279 | printf("w"); | |
1280 | printf("]\n"); | |
1281 | } | |
1282 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1283 | if (!bp->enabled) | |
1284 | continue; | |
1285 | printf("%2x %s ", BP_NUM(bp), | |
abb90ee7 | 1286 | (bp->enabled & BP_CIABR) ? "inst": "trap"); |
1da177e4 LT |
1287 | xmon_print_symbol(bp->address, " ", "\n"); |
1288 | } | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | if (!check_bp_loc(a)) | |
1293 | break; | |
1294 | bp = new_breakpoint(a); | |
1295 | if (bp != NULL) | |
1296 | bp->enabled |= BP_TRAP; | |
1297 | break; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* Very cheap human name for vector lookup. */ | |
1302 | static | |
1303 | const char *getvecname(unsigned long vec) | |
1304 | { | |
1305 | char *ret; | |
1306 | ||
1307 | switch (vec) { | |
1308 | case 0x100: ret = "(System Reset)"; break; | |
1309 | case 0x200: ret = "(Machine Check)"; break; | |
1310 | case 0x300: ret = "(Data Access)"; break; | |
1311 | case 0x380: ret = "(Data SLB Access)"; break; | |
1312 | case 0x400: ret = "(Instruction Access)"; break; | |
1313 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1314 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1315 | case 0x600: ret = "(Alignment)"; break; | |
1316 | case 0x700: ret = "(Program Check)"; break; | |
1317 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1318 | case 0x900: ret = "(Decrementer)"; break; | |
660e034c ME |
1319 | case 0x980: ret = "(Hypervisor Decrementer)"; break; |
1320 | case 0xa00: ret = "(Doorbell)"; break; | |
1da177e4 LT |
1321 | case 0xc00: ret = "(System Call)"; break; |
1322 | case 0xd00: ret = "(Single Step)"; break; | |
660e034c ME |
1323 | case 0xe40: ret = "(Emulation Assist)"; break; |
1324 | case 0xe60: ret = "(HMI)"; break; | |
1325 | case 0xe80: ret = "(Hypervisor Doorbell)"; break; | |
1da177e4 LT |
1326 | case 0xf00: ret = "(Performance Monitor)"; break; |
1327 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1328 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
660e034c ME |
1329 | case 0x1500: ret = "(Denormalisation)"; break; |
1330 | case 0x1700: ret = "(Altivec Assist)"; break; | |
1da177e4 LT |
1331 | default: ret = ""; |
1332 | } | |
1333 | return ret; | |
1334 | } | |
1335 | ||
1336 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1337 | unsigned long *endp) | |
1338 | { | |
1339 | unsigned long size, offset; | |
1340 | const char *name; | |
1da177e4 LT |
1341 | |
1342 | *startp = *endp = 0; | |
1343 | if (pc == 0) | |
1344 | return; | |
1345 | if (setjmp(bus_error_jmp) == 0) { | |
1346 | catch_memory_errors = 1; | |
1347 | sync(); | |
ffb45122 | 1348 | name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
1da177e4 LT |
1349 | if (name != NULL) { |
1350 | *startp = pc - offset; | |
1351 | *endp = pc - offset + size; | |
1352 | } | |
1353 | sync(); | |
1354 | } | |
1355 | catch_memory_errors = 0; | |
1356 | } | |
1357 | ||
ec2b36b9 BH |
1358 | #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
1359 | #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) | |
1360 | ||
1da177e4 LT |
1361 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1362 | unsigned long pc) | |
1363 | { | |
0104cd68 | 1364 | int max_to_print = 64; |
1da177e4 LT |
1365 | unsigned long ip; |
1366 | unsigned long newsp; | |
1367 | unsigned long marker; | |
1da177e4 LT |
1368 | struct pt_regs regs; |
1369 | ||
0104cd68 | 1370 | while (max_to_print--) { |
1da177e4 LT |
1371 | if (sp < PAGE_OFFSET) { |
1372 | if (sp != 0) | |
1373 | printf("SP (%lx) is in userspace\n", sp); | |
1374 | break; | |
1375 | } | |
1376 | ||
f78541dc | 1377 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1378 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1379 | printf("Couldn't read stack frame at %lx\n", sp); | |
1380 | break; | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * For the first stack frame, try to work out if | |
1385 | * LR and/or the saved LR value in the bottommost | |
1386 | * stack frame are valid. | |
1387 | */ | |
1388 | if ((pc | lr) != 0) { | |
1389 | unsigned long fnstart, fnend; | |
1390 | unsigned long nextip; | |
1391 | int printip = 1; | |
1392 | ||
1393 | get_function_bounds(pc, &fnstart, &fnend); | |
1394 | nextip = 0; | |
1395 | if (newsp > sp) | |
f78541dc | 1396 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1397 | sizeof(unsigned long)); |
1398 | if (lr == ip) { | |
1399 | if (lr < PAGE_OFFSET | |
1400 | || (fnstart <= lr && lr < fnend)) | |
1401 | printip = 0; | |
1402 | } else if (lr == nextip) { | |
1403 | printip = 0; | |
1404 | } else if (lr >= PAGE_OFFSET | |
1405 | && !(fnstart <= lr && lr < fnend)) { | |
1406 | printf("[link register ] "); | |
1407 | xmon_print_symbol(lr, " ", "\n"); | |
1408 | } | |
1409 | if (printip) { | |
f78541dc | 1410 | printf("["REG"] ", sp); |
1da177e4 LT |
1411 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1412 | } | |
1413 | pc = lr = 0; | |
1414 | ||
1415 | } else { | |
f78541dc | 1416 | printf("["REG"] ", sp); |
1da177e4 LT |
1417 | xmon_print_symbol(ip, " ", "\n"); |
1418 | } | |
1419 | ||
1420 | /* Look for "regshere" marker to see if this is | |
1421 | an exception frame. */ | |
f78541dc | 1422 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
ec2b36b9 | 1423 | && marker == STACK_FRAME_REGS_MARKER) { |
c4de3809 | 1424 | if (mread(sp + STACK_FRAME_OVERHEAD, ®s, sizeof(regs)) |
1da177e4 LT |
1425 | != sizeof(regs)) { |
1426 | printf("Couldn't read registers at %lx\n", | |
c4de3809 | 1427 | sp + STACK_FRAME_OVERHEAD); |
1da177e4 LT |
1428 | break; |
1429 | } | |
e3bc8049 | 1430 | printf("--- Exception: %lx %s at ", regs.trap, |
1da177e4 LT |
1431 | getvecname(TRAP(®s))); |
1432 | pc = regs.nip; | |
1433 | lr = regs.link; | |
1434 | xmon_print_symbol(pc, " ", "\n"); | |
1435 | } | |
1436 | ||
1437 | if (newsp == 0) | |
1438 | break; | |
1439 | ||
1440 | sp = newsp; | |
0104cd68 | 1441 | } |
1da177e4 LT |
1442 | } |
1443 | ||
1444 | static void backtrace(struct pt_regs *excp) | |
1445 | { | |
1446 | unsigned long sp; | |
1447 | ||
1448 | if (scanhex(&sp)) | |
1449 | xmon_show_stack(sp, 0, 0); | |
1450 | else | |
1451 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1452 | scannl(); | |
1453 | } | |
1454 | ||
1455 | static void print_bug_trap(struct pt_regs *regs) | |
1456 | { | |
ebdba9af | 1457 | #ifdef CONFIG_BUG |
73c9ceab | 1458 | const struct bug_entry *bug; |
1da177e4 LT |
1459 | unsigned long addr; |
1460 | ||
1461 | if (regs->msr & MSR_PR) | |
1462 | return; /* not in kernel */ | |
1463 | addr = regs->nip; /* address of trap instruction */ | |
1464 | if (addr < PAGE_OFFSET) | |
1465 | return; | |
1466 | bug = find_bug(regs->nip); | |
1467 | if (bug == NULL) | |
1468 | return; | |
73c9ceab | 1469 | if (is_warning_bug(bug)) |
1da177e4 LT |
1470 | return; |
1471 | ||
0a7c7efc | 1472 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
73c9ceab JF |
1473 | printf("kernel BUG at %s:%u!\n", |
1474 | bug->file, bug->line); | |
0a7c7efc SR |
1475 | #else |
1476 | printf("kernel BUG at %p!\n", (void *)bug->bug_addr); | |
1477 | #endif | |
ebdba9af | 1478 | #endif /* CONFIG_BUG */ |
1da177e4 LT |
1479 | } |
1480 | ||
9f1067c2 | 1481 | static void excprint(struct pt_regs *fp) |
1da177e4 LT |
1482 | { |
1483 | unsigned long trap; | |
1484 | ||
1485 | #ifdef CONFIG_SMP | |
1486 | printf("cpu 0x%x: ", smp_processor_id()); | |
1487 | #endif /* CONFIG_SMP */ | |
1488 | ||
1489 | trap = TRAP(fp); | |
1490 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1491 | printf(" pc: "); | |
1492 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1493 | ||
1494 | printf(" lr: ", fp->link); | |
1495 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1496 | ||
1497 | printf(" sp: %lx\n", fp->gpr[1]); | |
1498 | printf(" msr: %lx\n", fp->msr); | |
1499 | ||
ce54152f | 1500 | if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) { |
1da177e4 LT |
1501 | printf(" dar: %lx\n", fp->dar); |
1502 | if (trap != 0x380) | |
1503 | printf(" dsisr: %lx\n", fp->dsisr); | |
1504 | } | |
1505 | ||
1506 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1507 | #ifdef CONFIG_PPC64 |
7230c564 BH |
1508 | printf(" paca = 0x%lx\t softe: %d\t irq_happened: 0x%02x\n", |
1509 | local_paca, local_paca->soft_enabled, local_paca->irq_happened); | |
f78541dc | 1510 | #endif |
1da177e4 LT |
1511 | if (current) { |
1512 | printf(" pid = %ld, comm = %s\n", | |
1513 | current->pid, current->comm); | |
1514 | } | |
1515 | ||
1516 | if (trap == 0x700) | |
1517 | print_bug_trap(fp); | |
1518 | } | |
1519 | ||
9f1067c2 | 1520 | static void prregs(struct pt_regs *fp) |
1da177e4 | 1521 | { |
f78541dc | 1522 | int n, trap; |
1da177e4 LT |
1523 | unsigned long base; |
1524 | struct pt_regs regs; | |
1525 | ||
1526 | if (scanhex(&base)) { | |
1527 | if (setjmp(bus_error_jmp) == 0) { | |
1528 | catch_memory_errors = 1; | |
1529 | sync(); | |
1530 | regs = *(struct pt_regs *)base; | |
1531 | sync(); | |
1532 | __delay(200); | |
1533 | } else { | |
1534 | catch_memory_errors = 0; | |
f78541dc | 1535 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1536 | base); |
1537 | return; | |
1538 | } | |
1539 | catch_memory_errors = 0; | |
1540 | fp = ®s; | |
1541 | } | |
1542 | ||
f78541dc | 1543 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1544 | if (FULL_REGS(fp)) { |
1545 | for (n = 0; n < 16; ++n) | |
f78541dc | 1546 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1547 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1548 | } else { | |
1549 | for (n = 0; n < 7; ++n) | |
f78541dc | 1550 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1551 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1552 | } | |
f78541dc PM |
1553 | #else |
1554 | for (n = 0; n < 32; ++n) { | |
1555 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1556 | (n & 3) == 3? "\n": " "); | |
1557 | if (n == 12 && !FULL_REGS(fp)) { | |
1558 | printf("\n"); | |
1559 | break; | |
1560 | } | |
1561 | } | |
1562 | #endif | |
1da177e4 LT |
1563 | printf("pc = "); |
1564 | xmon_print_symbol(fp->nip, " ", "\n"); | |
48404f2e PM |
1565 | if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
1566 | printf("cfar= "); | |
1567 | xmon_print_symbol(fp->orig_gpr3, " ", "\n"); | |
1568 | } | |
1da177e4 LT |
1569 | printf("lr = "); |
1570 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1571 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1572 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1573 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1574 | trap = TRAP(fp); |
1575 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1576 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1577 | } |
1578 | ||
9f1067c2 | 1579 | static void cacheflush(void) |
1da177e4 LT |
1580 | { |
1581 | int cmd; | |
1582 | unsigned long nflush; | |
1583 | ||
1584 | cmd = inchar(); | |
1585 | if (cmd != 'i') | |
1586 | termch = cmd; | |
1587 | scanhex((void *)&adrs); | |
1588 | if (termch != '\n') | |
1589 | termch = 0; | |
1590 | nflush = 1; | |
1591 | scanhex(&nflush); | |
1592 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1593 | if (setjmp(bus_error_jmp) == 0) { | |
1594 | catch_memory_errors = 1; | |
1595 | sync(); | |
1596 | ||
1597 | if (cmd != 'i') { | |
1598 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1599 | cflush((void *) adrs); | |
1600 | } else { | |
1601 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1602 | cinval((void *) adrs); | |
1603 | } | |
1604 | sync(); | |
1605 | /* wait a little while to see if we get a machine check */ | |
1606 | __delay(200); | |
1607 | } | |
1608 | catch_memory_errors = 0; | |
1609 | } | |
1610 | ||
9f1067c2 | 1611 | static unsigned long |
1da177e4 LT |
1612 | read_spr(int n) |
1613 | { | |
1614 | unsigned int instrs[2]; | |
1615 | unsigned long (*code)(void); | |
1da177e4 | 1616 | unsigned long ret = -1UL; |
548ccebc PM |
1617 | #ifdef CONFIG_PPC64 |
1618 | unsigned long opd[3]; | |
1da177e4 | 1619 | |
1da177e4 LT |
1620 | opd[0] = (unsigned long)instrs; |
1621 | opd[1] = 0; | |
1622 | opd[2] = 0; | |
548ccebc PM |
1623 | code = (unsigned long (*)(void)) opd; |
1624 | #else | |
1625 | code = (unsigned long (*)(void)) instrs; | |
1626 | #endif | |
1627 | ||
1628 | /* mfspr r3,n; blr */ | |
1629 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1630 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1631 | store_inst(instrs); |
1632 | store_inst(instrs+1); | |
1da177e4 LT |
1633 | |
1634 | if (setjmp(bus_error_jmp) == 0) { | |
1635 | catch_memory_errors = 1; | |
1636 | sync(); | |
1637 | ||
1638 | ret = code(); | |
1639 | ||
1640 | sync(); | |
1641 | /* wait a little while to see if we get a machine check */ | |
1642 | __delay(200); | |
1643 | n = size; | |
1644 | } | |
1645 | ||
1646 | return ret; | |
1647 | } | |
1648 | ||
9f1067c2 | 1649 | static void |
1da177e4 LT |
1650 | write_spr(int n, unsigned long val) |
1651 | { | |
1652 | unsigned int instrs[2]; | |
1653 | unsigned long (*code)(unsigned long); | |
548ccebc | 1654 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1655 | unsigned long opd[3]; |
1656 | ||
1da177e4 LT |
1657 | opd[0] = (unsigned long)instrs; |
1658 | opd[1] = 0; | |
1659 | opd[2] = 0; | |
548ccebc PM |
1660 | code = (unsigned long (*)(unsigned long)) opd; |
1661 | #else | |
1662 | code = (unsigned long (*)(unsigned long)) instrs; | |
1663 | #endif | |
1664 | ||
1665 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1666 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1667 | store_inst(instrs); |
1668 | store_inst(instrs+1); | |
1da177e4 LT |
1669 | |
1670 | if (setjmp(bus_error_jmp) == 0) { | |
1671 | catch_memory_errors = 1; | |
1672 | sync(); | |
1673 | ||
1674 | code(val); | |
1675 | ||
1676 | sync(); | |
1677 | /* wait a little while to see if we get a machine check */ | |
1678 | __delay(200); | |
1679 | n = size; | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | static unsigned long regno; | |
1684 | extern char exc_prolog; | |
1685 | extern char dec_exc; | |
1686 | ||
9f1067c2 | 1687 | static void super_regs(void) |
1da177e4 LT |
1688 | { |
1689 | int cmd; | |
1690 | unsigned long val; | |
1da177e4 LT |
1691 | |
1692 | cmd = skipbl(); | |
1693 | if (cmd == '\n') { | |
e3bc8049 | 1694 | unsigned long sp, toc; |
1da177e4 LT |
1695 | asm("mr %0,1" : "=r" (sp) :); |
1696 | asm("mr %0,2" : "=r" (toc) :); | |
1697 | ||
f78541dc PM |
1698 | printf("msr = "REG" sprg0= "REG"\n", |
1699 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1700 | printf("pvr = "REG" sprg1= "REG"\n", | |
e3bc8049 | 1701 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
f78541dc PM |
1702 | printf("dec = "REG" sprg2= "REG"\n", |
1703 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1704 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1705 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 LT |
1706 | |
1707 | return; | |
1708 | } | |
1709 | ||
1710 | scanhex(®no); | |
1711 | switch (cmd) { | |
1712 | case 'w': | |
1713 | val = read_spr(regno); | |
1714 | scanhex(&val); | |
1715 | write_spr(regno, val); | |
1716 | /* fall through */ | |
1717 | case 'r': | |
1718 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1719 | break; | |
1da177e4 LT |
1720 | } |
1721 | scannl(); | |
1722 | } | |
1723 | ||
1724 | /* | |
1725 | * Stuff for reading and writing memory safely | |
1726 | */ | |
9f1067c2 | 1727 | static int |
1da177e4 LT |
1728 | mread(unsigned long adrs, void *buf, int size) |
1729 | { | |
1730 | volatile int n; | |
1731 | char *p, *q; | |
1732 | ||
1733 | n = 0; | |
1734 | if (setjmp(bus_error_jmp) == 0) { | |
1735 | catch_memory_errors = 1; | |
1736 | sync(); | |
1737 | p = (char *)adrs; | |
1738 | q = (char *)buf; | |
1739 | switch (size) { | |
1740 | case 2: | |
f78541dc | 1741 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1742 | break; |
1743 | case 4: | |
f78541dc | 1744 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1745 | break; |
1746 | case 8: | |
f78541dc | 1747 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1748 | break; |
1749 | default: | |
1750 | for( ; n < size; ++n) { | |
1751 | *q++ = *p++; | |
1752 | sync(); | |
1753 | } | |
1754 | } | |
1755 | sync(); | |
1756 | /* wait a little while to see if we get a machine check */ | |
1757 | __delay(200); | |
1758 | n = size; | |
1759 | } | |
1760 | catch_memory_errors = 0; | |
1761 | return n; | |
1762 | } | |
1763 | ||
9f1067c2 | 1764 | static int |
1da177e4 LT |
1765 | mwrite(unsigned long adrs, void *buf, int size) |
1766 | { | |
1767 | volatile int n; | |
1768 | char *p, *q; | |
1769 | ||
1770 | n = 0; | |
1771 | if (setjmp(bus_error_jmp) == 0) { | |
1772 | catch_memory_errors = 1; | |
1773 | sync(); | |
1774 | p = (char *) adrs; | |
1775 | q = (char *) buf; | |
1776 | switch (size) { | |
1777 | case 2: | |
f78541dc | 1778 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1779 | break; |
1780 | case 4: | |
f78541dc | 1781 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1782 | break; |
1783 | case 8: | |
f78541dc | 1784 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1785 | break; |
1786 | default: | |
1787 | for ( ; n < size; ++n) { | |
1788 | *p++ = *q++; | |
1789 | sync(); | |
1790 | } | |
1791 | } | |
1792 | sync(); | |
1793 | /* wait a little while to see if we get a machine check */ | |
1794 | __delay(200); | |
1795 | n = size; | |
1796 | } else { | |
736256e4 | 1797 | printf("*** Error writing address "REG"\n", adrs + n); |
1da177e4 LT |
1798 | } |
1799 | catch_memory_errors = 0; | |
1800 | return n; | |
1801 | } | |
1802 | ||
1803 | static int fault_type; | |
f78541dc | 1804 | static int fault_except; |
1da177e4 LT |
1805 | static char *fault_chars[] = { "--", "**", "##" }; |
1806 | ||
f78541dc | 1807 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1808 | { |
f78541dc | 1809 | fault_except = TRAP(regs); |
1da177e4 LT |
1810 | switch (TRAP(regs)) { |
1811 | case 0x200: | |
1812 | fault_type = 0; | |
1813 | break; | |
1814 | case 0x300: | |
1815 | case 0x380: | |
1816 | fault_type = 1; | |
1817 | break; | |
1818 | default: | |
1819 | fault_type = 2; | |
1820 | } | |
1821 | ||
1822 | longjmp(bus_error_jmp, 1); | |
1823 | ||
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1828 | ||
9f1067c2 | 1829 | static void |
1da177e4 LT |
1830 | byterev(unsigned char *val, int size) |
1831 | { | |
1832 | int t; | |
1833 | ||
1834 | switch (size) { | |
1835 | case 2: | |
1836 | SWAP(val[0], val[1], t); | |
1837 | break; | |
1838 | case 4: | |
1839 | SWAP(val[0], val[3], t); | |
1840 | SWAP(val[1], val[2], t); | |
1841 | break; | |
1842 | case 8: /* is there really any use for this? */ | |
1843 | SWAP(val[0], val[7], t); | |
1844 | SWAP(val[1], val[6], t); | |
1845 | SWAP(val[2], val[5], t); | |
1846 | SWAP(val[3], val[4], t); | |
1847 | break; | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | static int brev; | |
1852 | static int mnoread; | |
1853 | ||
e3bc8049 | 1854 | static char *memex_help_string = |
1da177e4 LT |
1855 | "Memory examine command usage:\n" |
1856 | "m [addr] [flags] examine/change memory\n" | |
1857 | " addr is optional. will start where left off.\n" | |
1858 | " flags may include chars from this set:\n" | |
1859 | " b modify by bytes (default)\n" | |
1860 | " w modify by words (2 byte)\n" | |
1861 | " l modify by longs (4 byte)\n" | |
1862 | " d modify by doubleword (8 byte)\n" | |
1863 | " r toggle reverse byte order mode\n" | |
1864 | " n do not read memory (for i/o spaces)\n" | |
1865 | " . ok to read (default)\n" | |
1866 | "NOTE: flags are saved as defaults\n" | |
1867 | ""; | |
1868 | ||
e3bc8049 | 1869 | static char *memex_subcmd_help_string = |
1da177e4 LT |
1870 | "Memory examine subcommands:\n" |
1871 | " hexval write this val to current location\n" | |
1872 | " 'string' write chars from string to this location\n" | |
1873 | " ' increment address\n" | |
1874 | " ^ decrement address\n" | |
1875 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1876 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1877 | " ` clear no-read flag\n" | |
1878 | " ; stay at this addr\n" | |
1879 | " v change to byte mode\n" | |
1880 | " w change to word (2 byte) mode\n" | |
1881 | " l change to long (4 byte) mode\n" | |
1882 | " u change to doubleword (8 byte) mode\n" | |
1883 | " m addr change current addr\n" | |
1884 | " n toggle no-read flag\n" | |
1885 | " r toggle byte reverse flag\n" | |
1886 | " < count back up count bytes\n" | |
1887 | " > count skip forward count bytes\n" | |
1888 | " x exit this mode\n" | |
1889 | ""; | |
1890 | ||
9f1067c2 | 1891 | static void |
1da177e4 LT |
1892 | memex(void) |
1893 | { | |
1894 | int cmd, inc, i, nslash; | |
1895 | unsigned long n; | |
1896 | unsigned char val[16]; | |
1897 | ||
1898 | scanhex((void *)&adrs); | |
1899 | cmd = skipbl(); | |
1900 | if (cmd == '?') { | |
1901 | printf(memex_help_string); | |
1902 | return; | |
1903 | } else { | |
1904 | termch = cmd; | |
1905 | } | |
1906 | last_cmd = "m\n"; | |
1907 | while ((cmd = skipbl()) != '\n') { | |
1908 | switch( cmd ){ | |
1909 | case 'b': size = 1; break; | |
1910 | case 'w': size = 2; break; | |
1911 | case 'l': size = 4; break; | |
1912 | case 'd': size = 8; break; | |
1913 | case 'r': brev = !brev; break; | |
1914 | case 'n': mnoread = 1; break; | |
1915 | case '.': mnoread = 0; break; | |
1916 | } | |
1917 | } | |
1918 | if( size <= 0 ) | |
1919 | size = 1; | |
1920 | else if( size > 8 ) | |
1921 | size = 8; | |
1922 | for(;;){ | |
1923 | if (!mnoread) | |
1924 | n = mread(adrs, val, size); | |
e1449ed9 | 1925 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1926 | if (!mnoread) { |
1927 | if (brev) | |
1928 | byterev(val, size); | |
1929 | putchar(' '); | |
1930 | for (i = 0; i < n; ++i) | |
1931 | printf("%.2x", val[i]); | |
1932 | for (; i < size; ++i) | |
1933 | printf("%s", fault_chars[fault_type]); | |
1934 | } | |
1935 | putchar(' '); | |
1936 | inc = size; | |
1937 | nslash = 0; | |
1938 | for(;;){ | |
1939 | if( scanhex(&n) ){ | |
1940 | for (i = 0; i < size; ++i) | |
1941 | val[i] = n >> (i * 8); | |
1942 | if (!brev) | |
1943 | byterev(val, size); | |
1944 | mwrite(adrs, val, size); | |
1945 | inc = size; | |
1946 | } | |
1947 | cmd = skipbl(); | |
1948 | if (cmd == '\n') | |
1949 | break; | |
1950 | inc = 0; | |
1951 | switch (cmd) { | |
1952 | case '\'': | |
1953 | for(;;){ | |
1954 | n = inchar(); | |
1955 | if( n == '\\' ) | |
1956 | n = bsesc(); | |
1957 | else if( n == '\'' ) | |
1958 | break; | |
1959 | for (i = 0; i < size; ++i) | |
1960 | val[i] = n >> (i * 8); | |
1961 | if (!brev) | |
1962 | byterev(val, size); | |
1963 | mwrite(adrs, val, size); | |
1964 | adrs += size; | |
1965 | } | |
1966 | adrs -= size; | |
1967 | inc = size; | |
1968 | break; | |
1969 | case ',': | |
1970 | adrs += size; | |
1971 | break; | |
1972 | case '.': | |
1973 | mnoread = 0; | |
1974 | break; | |
1975 | case ';': | |
1976 | break; | |
1977 | case 'x': | |
1978 | case EOF: | |
1979 | scannl(); | |
1980 | return; | |
1981 | case 'b': | |
1982 | case 'v': | |
1983 | size = 1; | |
1984 | break; | |
1985 | case 'w': | |
1986 | size = 2; | |
1987 | break; | |
1988 | case 'l': | |
1989 | size = 4; | |
1990 | break; | |
1991 | case 'u': | |
1992 | size = 8; | |
1993 | break; | |
1994 | case '^': | |
1995 | adrs -= size; | |
1996 | break; | |
1997 | break; | |
1998 | case '/': | |
1999 | if (nslash > 0) | |
2000 | adrs -= 1 << nslash; | |
2001 | else | |
2002 | nslash = 0; | |
2003 | nslash += 4; | |
2004 | adrs += 1 << nslash; | |
2005 | break; | |
2006 | case '\\': | |
2007 | if (nslash < 0) | |
2008 | adrs += 1 << -nslash; | |
2009 | else | |
2010 | nslash = 0; | |
2011 | nslash -= 4; | |
2012 | adrs -= 1 << -nslash; | |
2013 | break; | |
2014 | case 'm': | |
2015 | scanhex((void *)&adrs); | |
2016 | break; | |
2017 | case 'n': | |
2018 | mnoread = 1; | |
2019 | break; | |
2020 | case 'r': | |
2021 | brev = !brev; | |
2022 | break; | |
2023 | case '<': | |
2024 | n = size; | |
2025 | scanhex(&n); | |
2026 | adrs -= n; | |
2027 | break; | |
2028 | case '>': | |
2029 | n = size; | |
2030 | scanhex(&n); | |
2031 | adrs += n; | |
2032 | break; | |
2033 | case '?': | |
2034 | printf(memex_subcmd_help_string); | |
2035 | break; | |
2036 | } | |
2037 | } | |
2038 | adrs += inc; | |
2039 | } | |
2040 | } | |
2041 | ||
9f1067c2 | 2042 | static int |
1da177e4 LT |
2043 | bsesc(void) |
2044 | { | |
2045 | int c; | |
2046 | ||
2047 | c = inchar(); | |
2048 | switch( c ){ | |
2049 | case 'n': c = '\n'; break; | |
2050 | case 'r': c = '\r'; break; | |
2051 | case 'b': c = '\b'; break; | |
2052 | case 't': c = '\t'; break; | |
2053 | } | |
2054 | return c; | |
2055 | } | |
2056 | ||
7e5b5938 OH |
2057 | static void xmon_rawdump (unsigned long adrs, long ndump) |
2058 | { | |
2059 | long n, m, r, nr; | |
2060 | unsigned char temp[16]; | |
2061 | ||
2062 | for (n = ndump; n > 0;) { | |
2063 | r = n < 16? n: 16; | |
2064 | nr = mread(adrs, temp, r); | |
2065 | adrs += nr; | |
2066 | for (m = 0; m < r; ++m) { | |
2067 | if (m < nr) | |
2068 | printf("%.2x", temp[m]); | |
2069 | else | |
2070 | printf("%s", fault_chars[fault_type]); | |
2071 | } | |
2072 | n -= r; | |
2073 | if (nr < r) | |
2074 | break; | |
2075 | } | |
2076 | printf("\n"); | |
2077 | } | |
2078 | ||
ddadb6b8 ME |
2079 | #ifdef CONFIG_PPC64 |
2080 | static void dump_one_paca(int cpu) | |
2081 | { | |
2082 | struct paca_struct *p; | |
2083 | ||
2084 | if (setjmp(bus_error_jmp) != 0) { | |
2085 | printf("*** Error dumping paca for cpu 0x%x!\n", cpu); | |
2086 | return; | |
2087 | } | |
2088 | ||
2089 | catch_memory_errors = 1; | |
2090 | sync(); | |
2091 | ||
2092 | p = &paca[cpu]; | |
2093 | ||
2094 | printf("paca for cpu 0x%x @ %p:\n", cpu, p); | |
2095 | ||
2096 | printf(" %-*s = %s\n", 16, "possible", cpu_possible(cpu) ? "yes" : "no"); | |
2097 | printf(" %-*s = %s\n", 16, "present", cpu_present(cpu) ? "yes" : "no"); | |
2098 | printf(" %-*s = %s\n", 16, "online", cpu_online(cpu) ? "yes" : "no"); | |
2099 | ||
2100 | #define DUMP(paca, name, format) \ | |
2101 | printf(" %-*s = %#-*"format"\t(0x%lx)\n", 16, #name, 18, paca->name, \ | |
2102 | offsetof(struct paca_struct, name)); | |
2103 | ||
2104 | DUMP(p, lock_token, "x"); | |
2105 | DUMP(p, paca_index, "x"); | |
2106 | DUMP(p, kernel_toc, "lx"); | |
2107 | DUMP(p, kernelbase, "lx"); | |
2108 | DUMP(p, kernel_msr, "lx"); | |
ddadb6b8 | 2109 | DUMP(p, emergency_sp, "p"); |
729b0f71 MS |
2110 | #ifdef CONFIG_PPC_BOOK3S_64 |
2111 | DUMP(p, mc_emergency_sp, "p"); | |
2112 | DUMP(p, in_mce, "x"); | |
2113 | #endif | |
ddadb6b8 ME |
2114 | DUMP(p, data_offset, "lx"); |
2115 | DUMP(p, hw_cpu_id, "x"); | |
2116 | DUMP(p, cpu_start, "x"); | |
2117 | DUMP(p, kexec_state, "x"); | |
2118 | DUMP(p, __current, "p"); | |
2119 | DUMP(p, kstack, "lx"); | |
2120 | DUMP(p, stab_rr, "lx"); | |
2121 | DUMP(p, saved_r1, "lx"); | |
2122 | DUMP(p, trap_save, "x"); | |
2123 | DUMP(p, soft_enabled, "x"); | |
2124 | DUMP(p, irq_happened, "x"); | |
2125 | DUMP(p, io_sync, "x"); | |
2126 | DUMP(p, irq_work_pending, "x"); | |
2127 | DUMP(p, nap_state_lost, "x"); | |
2128 | ||
2129 | #undef DUMP | |
2130 | ||
2131 | catch_memory_errors = 0; | |
2132 | sync(); | |
2133 | } | |
2134 | ||
2135 | static void dump_all_pacas(void) | |
2136 | { | |
2137 | int cpu; | |
2138 | ||
2139 | if (num_possible_cpus() == 0) { | |
2140 | printf("No possible cpus, use 'dp #' to dump individual cpus\n"); | |
2141 | return; | |
2142 | } | |
2143 | ||
2144 | for_each_possible_cpu(cpu) | |
2145 | dump_one_paca(cpu); | |
2146 | } | |
2147 | ||
2148 | static void dump_pacas(void) | |
2149 | { | |
2150 | unsigned long num; | |
2151 | int c; | |
2152 | ||
2153 | c = inchar(); | |
2154 | if (c == 'a') { | |
2155 | dump_all_pacas(); | |
2156 | return; | |
2157 | } | |
2158 | ||
2159 | termch = c; /* Put c back, it wasn't 'a' */ | |
2160 | ||
2161 | if (scanhex(&num)) | |
2162 | dump_one_paca(num); | |
2163 | else | |
2164 | dump_one_paca(xmon_owner); | |
2165 | } | |
2166 | #endif | |
2167 | ||
1da177e4 LT |
2168 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
2169 | || ('a' <= (c) && (c) <= 'f') \ | |
2170 | || ('A' <= (c) && (c) <= 'F')) | |
9f1067c2 | 2171 | static void |
1da177e4 LT |
2172 | dump(void) |
2173 | { | |
2174 | int c; | |
2175 | ||
2176 | c = inchar(); | |
ddadb6b8 ME |
2177 | |
2178 | #ifdef CONFIG_PPC64 | |
2179 | if (c == 'p') { | |
2180 | dump_pacas(); | |
2181 | return; | |
2182 | } | |
2183 | #endif | |
2184 | ||
1da177e4 LT |
2185 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
2186 | termch = c; | |
2187 | scanhex((void *)&adrs); | |
2188 | if (termch != '\n') | |
2189 | termch = 0; | |
2190 | if (c == 'i') { | |
2191 | scanhex(&nidump); | |
2192 | if (nidump == 0) | |
2193 | nidump = 16; | |
2194 | else if (nidump > MAX_DUMP) | |
2195 | nidump = MAX_DUMP; | |
2196 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
2197 | last_cmd = "di\n"; | |
f312deb4 VS |
2198 | } else if (c == 'l') { |
2199 | dump_log_buf(); | |
7e5b5938 OH |
2200 | } else if (c == 'r') { |
2201 | scanhex(&ndump); | |
2202 | if (ndump == 0) | |
2203 | ndump = 64; | |
2204 | xmon_rawdump(adrs, ndump); | |
2205 | adrs += ndump; | |
2206 | last_cmd = "dr\n"; | |
1da177e4 LT |
2207 | } else { |
2208 | scanhex(&ndump); | |
2209 | if (ndump == 0) | |
2210 | ndump = 64; | |
2211 | else if (ndump > MAX_DUMP) | |
2212 | ndump = MAX_DUMP; | |
2213 | prdump(adrs, ndump); | |
2214 | adrs += ndump; | |
2215 | last_cmd = "d\n"; | |
2216 | } | |
2217 | } | |
2218 | ||
9f1067c2 | 2219 | static void |
1da177e4 LT |
2220 | prdump(unsigned long adrs, long ndump) |
2221 | { | |
2222 | long n, m, c, r, nr; | |
2223 | unsigned char temp[16]; | |
2224 | ||
2225 | for (n = ndump; n > 0;) { | |
f78541dc | 2226 | printf(REG, adrs); |
1da177e4 LT |
2227 | putchar(' '); |
2228 | r = n < 16? n: 16; | |
2229 | nr = mread(adrs, temp, r); | |
2230 | adrs += nr; | |
2231 | for (m = 0; m < r; ++m) { | |
e3bc8049 | 2232 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
e1449ed9 | 2233 | putchar(' '); |
1da177e4 LT |
2234 | if (m < nr) |
2235 | printf("%.2x", temp[m]); | |
2236 | else | |
2237 | printf("%s", fault_chars[fault_type]); | |
2238 | } | |
e1449ed9 | 2239 | for (; m < 16; ++m) { |
e3bc8049 | 2240 | if ((m & (sizeof(long) - 1)) == 0) |
e1449ed9 | 2241 | putchar(' '); |
1da177e4 | 2242 | printf(" "); |
e1449ed9 | 2243 | } |
1da177e4 LT |
2244 | printf(" |"); |
2245 | for (m = 0; m < r; ++m) { | |
2246 | if (m < nr) { | |
2247 | c = temp[m]; | |
2248 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2249 | } else | |
2250 | putchar(' '); | |
2251 | } | |
2252 | n -= r; | |
2253 | for (; m < 16; ++m) | |
2254 | putchar(' '); | |
2255 | printf("|\n"); | |
2256 | if (nr < r) | |
2257 | break; | |
2258 | } | |
2259 | } | |
2260 | ||
4c4c8723 ME |
2261 | typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
2262 | ||
9f1067c2 | 2263 | static int |
4c4c8723 ME |
2264 | generic_inst_dump(unsigned long adr, long count, int praddr, |
2265 | instruction_dump_func dump_func) | |
1da177e4 LT |
2266 | { |
2267 | int nr, dotted; | |
2268 | unsigned long first_adr; | |
2269 | unsigned long inst, last_inst = 0; | |
2270 | unsigned char val[4]; | |
2271 | ||
2272 | dotted = 0; | |
2273 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2274 | nr = mread(adr, val, 4); | |
2275 | if (nr == 0) { | |
2276 | if (praddr) { | |
2277 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2278 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2279 | } |
2280 | break; | |
2281 | } | |
2282 | inst = GETWORD(val); | |
2283 | if (adr > first_adr && inst == last_inst) { | |
2284 | if (!dotted) { | |
2285 | printf(" ...\n"); | |
2286 | dotted = 1; | |
2287 | } | |
2288 | continue; | |
2289 | } | |
2290 | dotted = 0; | |
2291 | last_inst = inst; | |
2292 | if (praddr) | |
f78541dc | 2293 | printf(REG" %.8x", adr, inst); |
1da177e4 | 2294 | printf("\t"); |
4c4c8723 | 2295 | dump_func(inst, adr); |
1da177e4 LT |
2296 | printf("\n"); |
2297 | } | |
2298 | return adr - first_adr; | |
2299 | } | |
2300 | ||
9f1067c2 | 2301 | static int |
4c4c8723 ME |
2302 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
2303 | { | |
2304 | return generic_inst_dump(adr, count, praddr, print_insn_powerpc); | |
2305 | } | |
2306 | ||
1da177e4 LT |
2307 | void |
2308 | print_address(unsigned long addr) | |
2309 | { | |
2310 | xmon_print_symbol(addr, "\t# ", ""); | |
2311 | } | |
2312 | ||
f312deb4 VS |
2313 | void |
2314 | dump_log_buf(void) | |
2315 | { | |
ca5dd395 ME |
2316 | struct kmsg_dumper dumper = { .active = 1 }; |
2317 | unsigned char buf[128]; | |
2318 | size_t len; | |
f312deb4 | 2319 | |
e3bc8049 | 2320 | if (setjmp(bus_error_jmp) != 0) { |
ca5dd395 | 2321 | printf("Error dumping printk buffer!\n"); |
e3bc8049 ME |
2322 | return; |
2323 | } | |
f312deb4 | 2324 | |
e3bc8049 ME |
2325 | catch_memory_errors = 1; |
2326 | sync(); | |
f312deb4 | 2327 | |
ca5dd395 ME |
2328 | kmsg_dump_rewind_nolock(&dumper); |
2329 | while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) { | |
2330 | buf[len] = '\0'; | |
2331 | printf("%s", buf); | |
2332 | } | |
f312deb4 | 2333 | |
e3bc8049 ME |
2334 | sync(); |
2335 | /* wait a little while to see if we get a machine check */ | |
2336 | __delay(200); | |
2337 | catch_memory_errors = 0; | |
f312deb4 | 2338 | } |
1da177e4 LT |
2339 | |
2340 | /* | |
2341 | * Memory operations - move, set, print differences | |
2342 | */ | |
2343 | static unsigned long mdest; /* destination address */ | |
2344 | static unsigned long msrc; /* source address */ | |
2345 | static unsigned long mval; /* byte value to set memory to */ | |
2346 | static unsigned long mcount; /* # bytes to affect */ | |
2347 | static unsigned long mdiffs; /* max # differences to print */ | |
2348 | ||
9f1067c2 | 2349 | static void |
1da177e4 LT |
2350 | memops(int cmd) |
2351 | { | |
2352 | scanhex((void *)&mdest); | |
2353 | if( termch != '\n' ) | |
2354 | termch = 0; | |
2355 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2356 | if( termch != '\n' ) | |
2357 | termch = 0; | |
2358 | scanhex((void *)&mcount); | |
2359 | switch( cmd ){ | |
2360 | case 'm': | |
2361 | memmove((void *)mdest, (void *)msrc, mcount); | |
2362 | break; | |
2363 | case 's': | |
2364 | memset((void *)mdest, mval, mcount); | |
2365 | break; | |
2366 | case 'd': | |
2367 | if( termch != '\n' ) | |
2368 | termch = 0; | |
2369 | scanhex((void *)&mdiffs); | |
2370 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2371 | break; | |
2372 | } | |
2373 | } | |
2374 | ||
9f1067c2 | 2375 | static void |
1da177e4 LT |
2376 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
2377 | { | |
2378 | unsigned n, prt; | |
2379 | ||
2380 | prt = 0; | |
2381 | for( n = nb; n > 0; --n ) | |
2382 | if( *p1++ != *p2++ ) | |
2383 | if( ++prt <= maxpr ) | |
2384 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2385 | p1[-1], p2 - 1, p2[-1]); | |
2386 | if( prt > maxpr ) | |
2387 | printf("Total of %d differences\n", prt); | |
2388 | } | |
2389 | ||
2390 | static unsigned mend; | |
2391 | static unsigned mask; | |
2392 | ||
9f1067c2 | 2393 | static void |
1da177e4 LT |
2394 | memlocate(void) |
2395 | { | |
2396 | unsigned a, n; | |
2397 | unsigned char val[4]; | |
2398 | ||
2399 | last_cmd = "ml"; | |
2400 | scanhex((void *)&mdest); | |
2401 | if (termch != '\n') { | |
2402 | termch = 0; | |
2403 | scanhex((void *)&mend); | |
2404 | if (termch != '\n') { | |
2405 | termch = 0; | |
2406 | scanhex((void *)&mval); | |
2407 | mask = ~0; | |
2408 | if (termch != '\n') termch = 0; | |
2409 | scanhex((void *)&mask); | |
2410 | } | |
2411 | } | |
2412 | n = 0; | |
2413 | for (a = mdest; a < mend; a += 4) { | |
2414 | if (mread(a, val, 4) == 4 | |
2415 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2416 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2417 | if (++n >= 10) | |
2418 | break; | |
2419 | } | |
2420 | } | |
2421 | } | |
2422 | ||
2423 | static unsigned long mskip = 0x1000; | |
2424 | static unsigned long mlim = 0xffffffff; | |
2425 | ||
9f1067c2 | 2426 | static void |
1da177e4 LT |
2427 | memzcan(void) |
2428 | { | |
2429 | unsigned char v; | |
2430 | unsigned a; | |
2431 | int ok, ook; | |
2432 | ||
2433 | scanhex(&mdest); | |
2434 | if (termch != '\n') termch = 0; | |
2435 | scanhex(&mskip); | |
2436 | if (termch != '\n') termch = 0; | |
2437 | scanhex(&mlim); | |
2438 | ook = 0; | |
2439 | for (a = mdest; a < mlim; a += mskip) { | |
2440 | ok = mread(a, &v, 1); | |
2441 | if (ok && !ook) { | |
2442 | printf("%.8x .. ", a); | |
1da177e4 LT |
2443 | } else if (!ok && ook) |
2444 | printf("%.8x\n", a - mskip); | |
2445 | ook = ok; | |
2446 | if (a + mskip < a) | |
2447 | break; | |
2448 | } | |
2449 | if (ook) | |
2450 | printf("%.8x\n", a - mskip); | |
2451 | } | |
2452 | ||
9f1067c2 | 2453 | static void proccall(void) |
f78541dc PM |
2454 | { |
2455 | unsigned long args[8]; | |
2456 | unsigned long ret; | |
2457 | int i; | |
2458 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2459 | unsigned long, unsigned long, unsigned long, | |
2460 | unsigned long, unsigned long, unsigned long); | |
2461 | callfunc_t func; | |
2462 | ||
2463 | if (!scanhex(&adrs)) | |
2464 | return; | |
2465 | if (termch != '\n') | |
2466 | termch = 0; | |
2467 | for (i = 0; i < 8; ++i) | |
2468 | args[i] = 0; | |
2469 | for (i = 0; i < 8; ++i) { | |
2470 | if (!scanhex(&args[i]) || termch == '\n') | |
2471 | break; | |
2472 | termch = 0; | |
2473 | } | |
2474 | func = (callfunc_t) adrs; | |
2475 | ret = 0; | |
2476 | if (setjmp(bus_error_jmp) == 0) { | |
2477 | catch_memory_errors = 1; | |
2478 | sync(); | |
2479 | ret = func(args[0], args[1], args[2], args[3], | |
2480 | args[4], args[5], args[6], args[7]); | |
2481 | sync(); | |
736256e4 | 2482 | printf("return value is 0x%lx\n", ret); |
f78541dc PM |
2483 | } else { |
2484 | printf("*** %x exception occurred\n", fault_except); | |
2485 | } | |
2486 | catch_memory_errors = 0; | |
2487 | } | |
2488 | ||
1da177e4 LT |
2489 | /* Input scanning routines */ |
2490 | int | |
2491 | skipbl(void) | |
2492 | { | |
2493 | int c; | |
2494 | ||
2495 | if( termch != 0 ){ | |
2496 | c = termch; | |
2497 | termch = 0; | |
2498 | } else | |
2499 | c = inchar(); | |
2500 | while( c == ' ' || c == '\t' ) | |
2501 | c = inchar(); | |
2502 | return c; | |
2503 | } | |
2504 | ||
2505 | #define N_PTREGS 44 | |
2506 | static char *regnames[N_PTREGS] = { | |
2507 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2508 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2509 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2510 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2511 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2512 | #ifdef CONFIG_PPC64 | |
2513 | "softe", | |
2514 | #else | |
2515 | "mq", | |
2516 | #endif | |
1da177e4 LT |
2517 | "trap", "dar", "dsisr", "res" |
2518 | }; | |
2519 | ||
2520 | int | |
2521 | scanhex(unsigned long *vp) | |
2522 | { | |
2523 | int c, d; | |
2524 | unsigned long v; | |
2525 | ||
2526 | c = skipbl(); | |
2527 | if (c == '%') { | |
2528 | /* parse register name */ | |
2529 | char regname[8]; | |
2530 | int i; | |
2531 | ||
2532 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2533 | c = inchar(); | |
2534 | if (!isalnum(c)) { | |
2535 | termch = c; | |
2536 | break; | |
2537 | } | |
2538 | regname[i] = c; | |
2539 | } | |
2540 | regname[i] = 0; | |
2541 | for (i = 0; i < N_PTREGS; ++i) { | |
2542 | if (strcmp(regnames[i], regname) == 0) { | |
2543 | if (xmon_regs == NULL) { | |
2544 | printf("regs not available\n"); | |
2545 | return 0; | |
2546 | } | |
2547 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2548 | return 1; | |
2549 | } | |
2550 | } | |
2551 | printf("invalid register name '%%%s'\n", regname); | |
2552 | return 0; | |
2553 | } | |
2554 | ||
2555 | /* skip leading "0x" if any */ | |
2556 | ||
2557 | if (c == '0') { | |
2558 | c = inchar(); | |
2559 | if (c == 'x') { | |
2560 | c = inchar(); | |
2561 | } else { | |
2562 | d = hexdigit(c); | |
2563 | if (d == EOF) { | |
2564 | termch = c; | |
2565 | *vp = 0; | |
2566 | return 1; | |
2567 | } | |
2568 | } | |
2569 | } else if (c == '$') { | |
2570 | int i; | |
2571 | for (i=0; i<63; i++) { | |
2572 | c = inchar(); | |
2573 | if (isspace(c)) { | |
2574 | termch = c; | |
2575 | break; | |
2576 | } | |
2577 | tmpstr[i] = c; | |
2578 | } | |
2579 | tmpstr[i++] = 0; | |
6879dc13 BH |
2580 | *vp = 0; |
2581 | if (setjmp(bus_error_jmp) == 0) { | |
2582 | catch_memory_errors = 1; | |
2583 | sync(); | |
2584 | *vp = kallsyms_lookup_name(tmpstr); | |
2585 | sync(); | |
2586 | } | |
2587 | catch_memory_errors = 0; | |
1da177e4 LT |
2588 | if (!(*vp)) { |
2589 | printf("unknown symbol '%s'\n", tmpstr); | |
2590 | return 0; | |
2591 | } | |
2592 | return 1; | |
2593 | } | |
2594 | ||
2595 | d = hexdigit(c); | |
2596 | if (d == EOF) { | |
2597 | termch = c; | |
2598 | return 0; | |
2599 | } | |
2600 | v = 0; | |
2601 | do { | |
2602 | v = (v << 4) + d; | |
2603 | c = inchar(); | |
2604 | d = hexdigit(c); | |
2605 | } while (d != EOF); | |
2606 | termch = c; | |
2607 | *vp = v; | |
2608 | return 1; | |
2609 | } | |
2610 | ||
9f1067c2 | 2611 | static void |
1da177e4 LT |
2612 | scannl(void) |
2613 | { | |
2614 | int c; | |
2615 | ||
2616 | c = termch; | |
2617 | termch = 0; | |
2618 | while( c != '\n' ) | |
2619 | c = inchar(); | |
2620 | } | |
2621 | ||
9f1067c2 | 2622 | static int hexdigit(int c) |
1da177e4 LT |
2623 | { |
2624 | if( '0' <= c && c <= '9' ) | |
2625 | return c - '0'; | |
2626 | if( 'A' <= c && c <= 'F' ) | |
2627 | return c - ('A' - 10); | |
2628 | if( 'a' <= c && c <= 'f' ) | |
2629 | return c - ('a' - 10); | |
2630 | return EOF; | |
2631 | } | |
2632 | ||
2633 | void | |
2634 | getstring(char *s, int size) | |
2635 | { | |
2636 | int c; | |
2637 | ||
2638 | c = skipbl(); | |
2639 | do { | |
2640 | if( size > 1 ){ | |
2641 | *s++ = c; | |
2642 | --size; | |
2643 | } | |
2644 | c = inchar(); | |
2645 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2646 | termch = c; | |
2647 | *s = 0; | |
2648 | } | |
2649 | ||
2650 | static char line[256]; | |
2651 | static char *lineptr; | |
2652 | ||
9f1067c2 | 2653 | static void |
1da177e4 LT |
2654 | flush_input(void) |
2655 | { | |
2656 | lineptr = NULL; | |
2657 | } | |
2658 | ||
9f1067c2 | 2659 | static int |
1da177e4 LT |
2660 | inchar(void) |
2661 | { | |
2662 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2663 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2664 | lineptr = NULL; |
2665 | return EOF; | |
2666 | } | |
2667 | lineptr = line; | |
2668 | } | |
2669 | return *lineptr++; | |
2670 | } | |
2671 | ||
9f1067c2 | 2672 | static void |
1da177e4 LT |
2673 | take_input(char *str) |
2674 | { | |
2675 | lineptr = str; | |
2676 | } | |
2677 | ||
2678 | ||
2679 | static void | |
2680 | symbol_lookup(void) | |
2681 | { | |
2682 | int type = inchar(); | |
2683 | unsigned long addr; | |
2684 | static char tmp[64]; | |
2685 | ||
2686 | switch (type) { | |
2687 | case 'a': | |
2688 | if (scanhex(&addr)) | |
2689 | xmon_print_symbol(addr, ": ", "\n"); | |
2690 | termch = 0; | |
2691 | break; | |
2692 | case 's': | |
2693 | getstring(tmp, 64); | |
2694 | if (setjmp(bus_error_jmp) == 0) { | |
2695 | catch_memory_errors = 1; | |
2696 | sync(); | |
2697 | addr = kallsyms_lookup_name(tmp); | |
2698 | if (addr) | |
2699 | printf("%s: %lx\n", tmp, addr); | |
2700 | else | |
2701 | printf("Symbol '%s' not found.\n", tmp); | |
2702 | sync(); | |
2703 | } | |
2704 | catch_memory_errors = 0; | |
2705 | termch = 0; | |
2706 | break; | |
2707 | } | |
2708 | } | |
2709 | ||
2710 | ||
2711 | /* Print an address in numeric and symbolic form (if possible) */ | |
2712 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2713 | const char *after) | |
2714 | { | |
2715 | char *modname; | |
2716 | const char *name = NULL; | |
2717 | unsigned long offset, size; | |
2718 | ||
f78541dc | 2719 | printf(REG, address); |
1da177e4 LT |
2720 | if (setjmp(bus_error_jmp) == 0) { |
2721 | catch_memory_errors = 1; | |
2722 | sync(); | |
2723 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2724 | tmpstr); | |
2725 | sync(); | |
2726 | /* wait a little while to see if we get a machine check */ | |
2727 | __delay(200); | |
2728 | } | |
2729 | ||
2730 | catch_memory_errors = 0; | |
2731 | ||
2732 | if (name) { | |
2733 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2734 | if (modname) | |
2735 | printf(" [%s]", modname); | |
2736 | } | |
2737 | printf("%s", after); | |
2738 | } | |
2739 | ||
2d27cfd3 | 2740 | #ifdef CONFIG_PPC_BOOK3S_64 |
13b3d13b | 2741 | void dump_segments(void) |
1da177e4 LT |
2742 | { |
2743 | int i; | |
b3b9595f | 2744 | unsigned long esid,vsid,valid; |
2745 | unsigned long llp; | |
1da177e4 | 2746 | |
736256e4 | 2747 | printf("SLB contents of cpu 0x%x\n", smp_processor_id()); |
1da177e4 | 2748 | |
584f8b71 | 2749 | for (i = 0; i < mmu_slb_size; i++) { |
b3b9595f | 2750 | asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
2751 | asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); | |
2752 | valid = (esid & SLB_ESID_V); | |
2753 | if (valid | esid | vsid) { | |
2754 | printf("%02d %016lx %016lx", i, esid, vsid); | |
2755 | if (valid) { | |
2756 | llp = vsid & SLB_VSID_LLP; | |
2757 | if (vsid & SLB_VSID_B_1T) { | |
2758 | printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2759 | GET_ESID_1T(esid), | |
2760 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, | |
2761 | llp); | |
2762 | } else { | |
2763 | printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2764 | GET_ESID(esid), | |
2765 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, | |
2766 | llp); | |
2767 | } | |
2768 | } else | |
2769 | printf("\n"); | |
2770 | } | |
1da177e4 LT |
2771 | } |
2772 | } | |
f78541dc PM |
2773 | #endif |
2774 | ||
2775 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2776 | void dump_segments(void) | |
2777 | { | |
2778 | int i; | |
2779 | ||
2780 | printf("sr0-15 ="); | |
2781 | for (i = 0; i < 16; ++i) | |
2782 | printf(" %x", mfsrin(i)); | |
2783 | printf("\n"); | |
2784 | } | |
2785 | #endif | |
2786 | ||
5a8a1a28 BH |
2787 | #ifdef CONFIG_44x |
2788 | static void dump_tlb_44x(void) | |
2789 | { | |
2790 | int i; | |
2791 | ||
2792 | for (i = 0; i < PPC44x_TLB_SIZE; i++) { | |
2793 | unsigned long w0,w1,w2; | |
2794 | asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); | |
2795 | asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); | |
2796 | asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); | |
2797 | printf("[%02x] %08x %08x %08x ", i, w0, w1, w2); | |
2798 | if (w0 & PPC44x_TLB_VALID) { | |
2799 | printf("V %08x -> %01x%08x %c%c%c%c%c", | |
2800 | w0 & PPC44x_TLB_EPN_MASK, | |
2801 | w1 & PPC44x_TLB_ERPN_MASK, | |
2802 | w1 & PPC44x_TLB_RPN_MASK, | |
2803 | (w2 & PPC44x_TLB_W) ? 'W' : 'w', | |
2804 | (w2 & PPC44x_TLB_I) ? 'I' : 'i', | |
2805 | (w2 & PPC44x_TLB_M) ? 'M' : 'm', | |
2806 | (w2 & PPC44x_TLB_G) ? 'G' : 'g', | |
2807 | (w2 & PPC44x_TLB_E) ? 'E' : 'e'); | |
2808 | } | |
2809 | printf("\n"); | |
2810 | } | |
2811 | } | |
2812 | #endif /* CONFIG_44x */ | |
9f1067c2 | 2813 | |
03247157 BH |
2814 | #ifdef CONFIG_PPC_BOOK3E |
2815 | static void dump_tlb_book3e(void) | |
2816 | { | |
2817 | u32 mmucfg, pidmask, lpidmask; | |
2818 | u64 ramask; | |
2819 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | |
2820 | int mmu_version; | |
2821 | static const char *pgsz_names[] = { | |
2822 | " 1K", | |
2823 | " 2K", | |
2824 | " 4K", | |
2825 | " 8K", | |
2826 | " 16K", | |
2827 | " 32K", | |
2828 | " 64K", | |
2829 | "128K", | |
2830 | "256K", | |
2831 | "512K", | |
2832 | " 1M", | |
2833 | " 2M", | |
2834 | " 4M", | |
2835 | " 8M", | |
2836 | " 16M", | |
2837 | " 32M", | |
2838 | " 64M", | |
2839 | "128M", | |
2840 | "256M", | |
2841 | "512M", | |
2842 | " 1G", | |
2843 | " 2G", | |
2844 | " 4G", | |
2845 | " 8G", | |
2846 | " 16G", | |
2847 | " 32G", | |
2848 | " 64G", | |
2849 | "128G", | |
2850 | "256G", | |
2851 | "512G", | |
2852 | " 1T", | |
2853 | " 2T", | |
2854 | }; | |
2855 | ||
2856 | /* Gather some infos about the MMU */ | |
2857 | mmucfg = mfspr(SPRN_MMUCFG); | |
2858 | mmu_version = (mmucfg & 3) + 1; | |
2859 | ntlbs = ((mmucfg >> 2) & 3) + 1; | |
2860 | pidsz = ((mmucfg >> 6) & 0x1f) + 1; | |
2861 | lpidsz = (mmucfg >> 24) & 0xf; | |
2862 | rasz = (mmucfg >> 16) & 0x7f; | |
2863 | if ((mmu_version > 1) && (mmucfg & 0x10000)) | |
2864 | lrat = 1; | |
2865 | printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", | |
2866 | mmu_version, ntlbs, pidsz, lpidsz, rasz); | |
2867 | pidmask = (1ul << pidsz) - 1; | |
2868 | lpidmask = (1ul << lpidsz) - 1; | |
2869 | ramask = (1ull << rasz) - 1; | |
2870 | ||
2871 | for (tlb = 0; tlb < ntlbs; tlb++) { | |
2872 | u32 tlbcfg; | |
2873 | int nent, assoc, new_cc = 1; | |
2874 | printf("TLB %d:\n------\n", tlb); | |
2875 | switch(tlb) { | |
2876 | case 0: | |
2877 | tlbcfg = mfspr(SPRN_TLB0CFG); | |
2878 | break; | |
2879 | case 1: | |
2880 | tlbcfg = mfspr(SPRN_TLB1CFG); | |
2881 | break; | |
2882 | case 2: | |
2883 | tlbcfg = mfspr(SPRN_TLB2CFG); | |
2884 | break; | |
2885 | case 3: | |
2886 | tlbcfg = mfspr(SPRN_TLB3CFG); | |
2887 | break; | |
2888 | default: | |
2889 | printf("Unsupported TLB number !\n"); | |
2890 | continue; | |
2891 | } | |
2892 | nent = tlbcfg & 0xfff; | |
2893 | assoc = (tlbcfg >> 24) & 0xff; | |
2894 | for (i = 0; i < nent; i++) { | |
2895 | u32 mas0 = MAS0_TLBSEL(tlb); | |
2896 | u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); | |
2897 | u64 mas2 = 0; | |
2898 | u64 mas7_mas3; | |
2899 | int esel = i, cc = i; | |
2900 | ||
2901 | if (assoc != 0) { | |
2902 | cc = i / assoc; | |
2903 | esel = i % assoc; | |
2904 | mas2 = cc * 0x1000; | |
2905 | } | |
2906 | ||
2907 | mas0 |= MAS0_ESEL(esel); | |
2908 | mtspr(SPRN_MAS0, mas0); | |
2909 | mtspr(SPRN_MAS1, mas1); | |
2910 | mtspr(SPRN_MAS2, mas2); | |
2911 | asm volatile("tlbre 0,0,0" : : : "memory"); | |
2912 | mas1 = mfspr(SPRN_MAS1); | |
2913 | mas2 = mfspr(SPRN_MAS2); | |
2914 | mas7_mas3 = mfspr(SPRN_MAS7_MAS3); | |
2915 | if (assoc && (i % assoc) == 0) | |
2916 | new_cc = 1; | |
2917 | if (!(mas1 & MAS1_VALID)) | |
2918 | continue; | |
2919 | if (assoc == 0) | |
2920 | printf("%04x- ", i); | |
2921 | else if (new_cc) | |
2922 | printf("%04x-%c", cc, 'A' + esel); | |
2923 | else | |
2924 | printf(" |%c", 'A' + esel); | |
2925 | new_cc = 0; | |
2926 | printf(" %016llx %04x %s %c%c AS%c", | |
2927 | mas2 & ~0x3ffull, | |
2928 | (mas1 >> 16) & 0x3fff, | |
2929 | pgsz_names[(mas1 >> 7) & 0x1f], | |
2930 | mas1 & MAS1_IND ? 'I' : ' ', | |
2931 | mas1 & MAS1_IPROT ? 'P' : ' ', | |
2932 | mas1 & MAS1_TS ? '1' : '0'); | |
2933 | printf(" %c%c%c%c%c%c%c", | |
2934 | mas2 & MAS2_X0 ? 'a' : ' ', | |
2935 | mas2 & MAS2_X1 ? 'v' : ' ', | |
2936 | mas2 & MAS2_W ? 'w' : ' ', | |
2937 | mas2 & MAS2_I ? 'i' : ' ', | |
2938 | mas2 & MAS2_M ? 'm' : ' ', | |
2939 | mas2 & MAS2_G ? 'g' : ' ', | |
2940 | mas2 & MAS2_E ? 'e' : ' '); | |
2941 | printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); | |
2942 | if (mas1 & MAS1_IND) | |
2943 | printf(" %s\n", | |
2944 | pgsz_names[(mas7_mas3 >> 1) & 0x1f]); | |
2945 | else | |
2946 | printf(" U%c%c%c S%c%c%c\n", | |
2947 | mas7_mas3 & MAS3_UX ? 'x' : ' ', | |
2948 | mas7_mas3 & MAS3_UW ? 'w' : ' ', | |
2949 | mas7_mas3 & MAS3_UR ? 'r' : ' ', | |
2950 | mas7_mas3 & MAS3_SX ? 'x' : ' ', | |
2951 | mas7_mas3 & MAS3_SW ? 'w' : ' ', | |
2952 | mas7_mas3 & MAS3_SR ? 'r' : ' '); | |
2953 | } | |
2954 | } | |
2955 | } | |
2956 | #endif /* CONFIG_PPC_BOOK3E */ | |
2957 | ||
9f1067c2 | 2958 | static void xmon_init(int enable) |
b13cfd17 OH |
2959 | { |
2960 | if (enable) { | |
2961 | __debugger = xmon; | |
2962 | __debugger_ipi = xmon_ipi; | |
2963 | __debugger_bpt = xmon_bpt; | |
2964 | __debugger_sstep = xmon_sstep; | |
2965 | __debugger_iabr_match = xmon_iabr_match; | |
9422de3e | 2966 | __debugger_break_match = xmon_break_match; |
b13cfd17 OH |
2967 | __debugger_fault_handler = xmon_fault_handler; |
2968 | } else { | |
2969 | __debugger = NULL; | |
2970 | __debugger_ipi = NULL; | |
2971 | __debugger_bpt = NULL; | |
2972 | __debugger_sstep = NULL; | |
2973 | __debugger_iabr_match = NULL; | |
9422de3e | 2974 | __debugger_break_match = NULL; |
b13cfd17 OH |
2975 | __debugger_fault_handler = NULL; |
2976 | } | |
1da177e4 | 2977 | } |
fca5dcd4 PM |
2978 | |
2979 | #ifdef CONFIG_MAGIC_SYSRQ | |
1495cc9d | 2980 | static void sysrq_handle_xmon(int key) |
fca5dcd4 PM |
2981 | { |
2982 | /* ensure xmon is enabled */ | |
2983 | xmon_init(1); | |
7d12e780 | 2984 | debugger(get_irq_regs()); |
fca5dcd4 PM |
2985 | } |
2986 | ||
1495cc9d | 2987 | static struct sysrq_key_op sysrq_xmon_op = { |
fca5dcd4 | 2988 | .handler = sysrq_handle_xmon, |
90a102e5 | 2989 | .help_msg = "xmon(x)", |
fca5dcd4 PM |
2990 | .action_msg = "Entering xmon", |
2991 | }; | |
2992 | ||
2993 | static int __init setup_xmon_sysrq(void) | |
2994 | { | |
2995 | register_sysrq_key('x', &sysrq_xmon_op); | |
2996 | return 0; | |
2997 | } | |
2998 | __initcall(setup_xmon_sysrq); | |
2999 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
47679283 | 3000 | |
f5e6a280 | 3001 | static int __initdata xmon_early, xmon_off; |
47679283 ME |
3002 | |
3003 | static int __init early_parse_xmon(char *p) | |
3004 | { | |
3005 | if (!p || strncmp(p, "early", 5) == 0) { | |
3006 | /* just "xmon" is equivalent to "xmon=early" */ | |
3007 | xmon_init(1); | |
3008 | xmon_early = 1; | |
3009 | } else if (strncmp(p, "on", 2) == 0) | |
3010 | xmon_init(1); | |
3011 | else if (strncmp(p, "off", 3) == 0) | |
3012 | xmon_off = 1; | |
3013 | else if (strncmp(p, "nobt", 4) == 0) | |
3014 | xmon_no_auto_backtrace = 1; | |
3015 | else | |
3016 | return 1; | |
3017 | ||
3018 | return 0; | |
3019 | } | |
3020 | early_param("xmon", early_parse_xmon); | |
3021 | ||
3022 | void __init xmon_setup(void) | |
3023 | { | |
3024 | #ifdef CONFIG_XMON_DEFAULT | |
3025 | if (!xmon_off) | |
3026 | xmon_init(1); | |
3027 | #endif | |
3028 | if (xmon_early) | |
3029 | debugger(NULL); | |
3030 | } | |
ff8a8f25 | 3031 | |
e055595d | 3032 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 ME |
3033 | |
3034 | struct spu_info { | |
3035 | struct spu *spu; | |
3036 | u64 saved_mfc_sr1_RW; | |
3037 | u32 saved_spu_runcntl_RW; | |
24a24c85 | 3038 | unsigned long dump_addr; |
ff8a8f25 ME |
3039 | u8 stopped_ok; |
3040 | }; | |
3041 | ||
3042 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ | |
3043 | ||
3044 | static struct spu_info spu_info[XMON_NUM_SPUS]; | |
3045 | ||
3046 | void xmon_register_spus(struct list_head *list) | |
3047 | { | |
3048 | struct spu *spu; | |
3049 | ||
3050 | list_for_each_entry(spu, list, full_list) { | |
3051 | if (spu->number >= XMON_NUM_SPUS) { | |
3052 | WARN_ON(1); | |
3053 | continue; | |
3054 | } | |
3055 | ||
3056 | spu_info[spu->number].spu = spu; | |
3057 | spu_info[spu->number].stopped_ok = 0; | |
24a24c85 ME |
3058 | spu_info[spu->number].dump_addr = (unsigned long) |
3059 | spu_info[spu->number].spu->local_store; | |
ff8a8f25 ME |
3060 | } |
3061 | } | |
3062 | ||
3063 | static void stop_spus(void) | |
3064 | { | |
3065 | struct spu *spu; | |
3066 | int i; | |
3067 | u64 tmp; | |
3068 | ||
3069 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3070 | if (!spu_info[i].spu) | |
3071 | continue; | |
3072 | ||
3073 | if (setjmp(bus_error_jmp) == 0) { | |
3074 | catch_memory_errors = 1; | |
3075 | sync(); | |
3076 | ||
3077 | spu = spu_info[i].spu; | |
3078 | ||
3079 | spu_info[i].saved_spu_runcntl_RW = | |
3080 | in_be32(&spu->problem->spu_runcntl_RW); | |
3081 | ||
3082 | tmp = spu_mfc_sr1_get(spu); | |
3083 | spu_info[i].saved_mfc_sr1_RW = tmp; | |
3084 | ||
3085 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; | |
3086 | spu_mfc_sr1_set(spu, tmp); | |
3087 | ||
3088 | sync(); | |
3089 | __delay(200); | |
3090 | ||
3091 | spu_info[i].stopped_ok = 1; | |
2a14442b ME |
3092 | |
3093 | printf("Stopped spu %.2d (was %s)\n", i, | |
3094 | spu_info[i].saved_spu_runcntl_RW ? | |
3095 | "running" : "stopped"); | |
ff8a8f25 ME |
3096 | } else { |
3097 | catch_memory_errors = 0; | |
3098 | printf("*** Error stopping spu %.2d\n", i); | |
3099 | } | |
3100 | catch_memory_errors = 0; | |
3101 | } | |
3102 | } | |
3103 | ||
3104 | static void restart_spus(void) | |
3105 | { | |
3106 | struct spu *spu; | |
3107 | int i; | |
3108 | ||
3109 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3110 | if (!spu_info[i].spu) | |
3111 | continue; | |
3112 | ||
3113 | if (!spu_info[i].stopped_ok) { | |
3114 | printf("*** Error, spu %d was not successfully stopped" | |
3115 | ", not restarting\n", i); | |
3116 | continue; | |
3117 | } | |
3118 | ||
3119 | if (setjmp(bus_error_jmp) == 0) { | |
3120 | catch_memory_errors = 1; | |
3121 | sync(); | |
3122 | ||
3123 | spu = spu_info[i].spu; | |
3124 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); | |
3125 | out_be32(&spu->problem->spu_runcntl_RW, | |
3126 | spu_info[i].saved_spu_runcntl_RW); | |
3127 | ||
3128 | sync(); | |
3129 | __delay(200); | |
3130 | ||
3131 | printf("Restarted spu %.2d\n", i); | |
3132 | } else { | |
3133 | catch_memory_errors = 0; | |
3134 | printf("*** Error restarting spu %.2d\n", i); | |
3135 | } | |
3136 | catch_memory_errors = 0; | |
3137 | } | |
3138 | } | |
3139 | ||
a8984970 | 3140 | #define DUMP_WIDTH 23 |
437a0706 | 3141 | #define DUMP_VALUE(format, field, value) \ |
a8984970 ME |
3142 | do { \ |
3143 | if (setjmp(bus_error_jmp) == 0) { \ | |
3144 | catch_memory_errors = 1; \ | |
3145 | sync(); \ | |
3146 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ | |
437a0706 | 3147 | #field, value); \ |
a8984970 ME |
3148 | sync(); \ |
3149 | __delay(200); \ | |
3150 | } else { \ | |
3151 | catch_memory_errors = 0; \ | |
3152 | printf(" %-*s = *** Error reading field.\n", \ | |
3153 | DUMP_WIDTH, #field); \ | |
3154 | } \ | |
3155 | catch_memory_errors = 0; \ | |
3156 | } while (0) | |
3157 | ||
437a0706 ME |
3158 | #define DUMP_FIELD(obj, format, field) \ |
3159 | DUMP_VALUE(format, field, obj->field) | |
3160 | ||
a8984970 ME |
3161 | static void dump_spu_fields(struct spu *spu) |
3162 | { | |
3163 | printf("Dumping spu fields at address %p:\n", spu); | |
3164 | ||
3165 | DUMP_FIELD(spu, "0x%x", number); | |
3166 | DUMP_FIELD(spu, "%s", name); | |
a8984970 ME |
3167 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
3168 | DUMP_FIELD(spu, "0x%p", local_store); | |
3169 | DUMP_FIELD(spu, "0x%lx", ls_size); | |
3170 | DUMP_FIELD(spu, "0x%x", node); | |
3171 | DUMP_FIELD(spu, "0x%lx", flags); | |
a8984970 | 3172 | DUMP_FIELD(spu, "%d", class_0_pending); |
f3d69e05 | 3173 | DUMP_FIELD(spu, "0x%lx", class_0_dar); |
f3d69e05 LB |
3174 | DUMP_FIELD(spu, "0x%lx", class_1_dar); |
3175 | DUMP_FIELD(spu, "0x%lx", class_1_dsisr); | |
a8984970 ME |
3176 | DUMP_FIELD(spu, "0x%lx", irqs[0]); |
3177 | DUMP_FIELD(spu, "0x%lx", irqs[1]); | |
3178 | DUMP_FIELD(spu, "0x%lx", irqs[2]); | |
3179 | DUMP_FIELD(spu, "0x%x", slb_replace); | |
3180 | DUMP_FIELD(spu, "%d", pid); | |
a8984970 ME |
3181 | DUMP_FIELD(spu, "0x%p", mm); |
3182 | DUMP_FIELD(spu, "0x%p", ctx); | |
3183 | DUMP_FIELD(spu, "0x%p", rq); | |
3184 | DUMP_FIELD(spu, "0x%p", timestamp); | |
3185 | DUMP_FIELD(spu, "0x%lx", problem_phys); | |
3186 | DUMP_FIELD(spu, "0x%p", problem); | |
437a0706 ME |
3187 | DUMP_VALUE("0x%x", problem->spu_runcntl_RW, |
3188 | in_be32(&spu->problem->spu_runcntl_RW)); | |
3189 | DUMP_VALUE("0x%x", problem->spu_status_R, | |
3190 | in_be32(&spu->problem->spu_status_R)); | |
3191 | DUMP_VALUE("0x%x", problem->spu_npc_RW, | |
3192 | in_be32(&spu->problem->spu_npc_RW)); | |
a8984970 | 3193 | DUMP_FIELD(spu, "0x%p", priv2); |
a985239b | 3194 | DUMP_FIELD(spu, "0x%p", pdata); |
a8984970 ME |
3195 | } |
3196 | ||
af89fb80 ME |
3197 | int |
3198 | spu_inst_dump(unsigned long adr, long count, int praddr) | |
3199 | { | |
3200 | return generic_inst_dump(adr, count, praddr, print_insn_spu); | |
3201 | } | |
3202 | ||
3203 | static void dump_spu_ls(unsigned long num, int subcmd) | |
24a24c85 ME |
3204 | { |
3205 | unsigned long offset, addr, ls_addr; | |
3206 | ||
3207 | if (setjmp(bus_error_jmp) == 0) { | |
3208 | catch_memory_errors = 1; | |
3209 | sync(); | |
3210 | ls_addr = (unsigned long)spu_info[num].spu->local_store; | |
3211 | sync(); | |
3212 | __delay(200); | |
3213 | } else { | |
3214 | catch_memory_errors = 0; | |
3215 | printf("*** Error: accessing spu info for spu %d\n", num); | |
3216 | return; | |
3217 | } | |
3218 | catch_memory_errors = 0; | |
3219 | ||
3220 | if (scanhex(&offset)) | |
3221 | addr = ls_addr + offset; | |
3222 | else | |
3223 | addr = spu_info[num].dump_addr; | |
3224 | ||
3225 | if (addr >= ls_addr + LS_SIZE) { | |
3226 | printf("*** Error: address outside of local store\n"); | |
3227 | return; | |
3228 | } | |
3229 | ||
af89fb80 ME |
3230 | switch (subcmd) { |
3231 | case 'i': | |
3232 | addr += spu_inst_dump(addr, 16, 1); | |
3233 | last_cmd = "sdi\n"; | |
3234 | break; | |
3235 | default: | |
3236 | prdump(addr, 64); | |
3237 | addr += 64; | |
3238 | last_cmd = "sd\n"; | |
3239 | break; | |
3240 | } | |
24a24c85 ME |
3241 | |
3242 | spu_info[num].dump_addr = addr; | |
3243 | } | |
3244 | ||
ff8a8f25 ME |
3245 | static int do_spu_cmd(void) |
3246 | { | |
24a24c85 | 3247 | static unsigned long num = 0; |
af89fb80 | 3248 | int cmd, subcmd = 0; |
ff8a8f25 ME |
3249 | |
3250 | cmd = inchar(); | |
3251 | switch (cmd) { | |
3252 | case 's': | |
3253 | stop_spus(); | |
3254 | break; | |
3255 | case 'r': | |
3256 | restart_spus(); | |
3257 | break; | |
24a24c85 | 3258 | case 'd': |
af89fb80 ME |
3259 | subcmd = inchar(); |
3260 | if (isxdigit(subcmd) || subcmd == '\n') | |
3261 | termch = subcmd; | |
3262 | case 'f': | |
24a24c85 ME |
3263 | scanhex(&num); |
3264 | if (num >= XMON_NUM_SPUS || !spu_info[num].spu) { | |
a8984970 | 3265 | printf("*** Error: invalid spu number\n"); |
24a24c85 ME |
3266 | return 0; |
3267 | } | |
3268 | ||
3269 | switch (cmd) { | |
3270 | case 'f': | |
3271 | dump_spu_fields(spu_info[num].spu); | |
3272 | break; | |
3273 | default: | |
af89fb80 | 3274 | dump_spu_ls(num, subcmd); |
24a24c85 ME |
3275 | break; |
3276 | } | |
3277 | ||
a8984970 | 3278 | break; |
ff8a8f25 ME |
3279 | default: |
3280 | return -1; | |
3281 | } | |
3282 | ||
3283 | return 0; | |
3284 | } | |
e055595d | 3285 | #else /* ! CONFIG_SPU_BASE */ |
ff8a8f25 ME |
3286 | static int do_spu_cmd(void) |
3287 | { | |
3288 | return -1; | |
3289 | } | |
3290 | #endif |