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Commit | Line | Data |
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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> |
05b981f4 | 28 | #include <linux/ctype.h> |
1da177e4 LT |
29 | |
30 | #include <asm/ptrace.h> | |
31 | #include <asm/string.h> | |
32 | #include <asm/prom.h> | |
33 | #include <asm/machdep.h> | |
f78541dc | 34 | #include <asm/xmon.h> |
1da177e4 LT |
35 | #include <asm/processor.h> |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/mmu.h> | |
38 | #include <asm/mmu_context.h> | |
1da177e4 LT |
39 | #include <asm/cputable.h> |
40 | #include <asm/rtas.h> | |
41 | #include <asm/sstep.h> | |
f583ffce | 42 | #include <asm/irq_regs.h> |
ff8a8f25 ME |
43 | #include <asm/spu.h> |
44 | #include <asm/spu_priv1.h> | |
c3b75bd7 | 45 | #include <asm/setjmp.h> |
322b4394 | 46 | #include <asm/reg.h> |
ae3a197e | 47 | #include <asm/debug.h> |
9422de3e | 48 | #include <asm/hw_breakpoint.h> |
f78541dc PM |
49 | |
50 | #ifdef CONFIG_PPC64 | |
1da177e4 | 51 | #include <asm/hvcall.h> |
f78541dc PM |
52 | #include <asm/paca.h> |
53 | #endif | |
1da177e4 | 54 | |
1ad7d705 AK |
55 | #if defined(CONFIG_PPC_SPLPAR) |
56 | #include <asm/plpar_wrappers.h> | |
57 | #else | |
58 | static inline long plapr_set_ciabr(unsigned long ciabr) {return 0; }; | |
59 | #endif | |
60 | ||
1da177e4 | 61 | #include "nonstdio.h" |
e0426047 | 62 | #include "dis-asm.h" |
1da177e4 | 63 | |
1da177e4 | 64 | #ifdef CONFIG_SMP |
1c8950ff | 65 | static cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
1da177e4 LT |
66 | static unsigned long xmon_taken = 1; |
67 | static int xmon_owner; | |
68 | static int xmon_gate; | |
ddadb6b8 ME |
69 | #else |
70 | #define xmon_owner 0 | |
1da177e4 LT |
71 | #endif /* CONFIG_SMP */ |
72 | ||
5be3492f | 73 | static unsigned long in_xmon __read_mostly = 0; |
1da177e4 LT |
74 | |
75 | static unsigned long adrs; | |
76 | static int size = 1; | |
77 | #define MAX_DUMP (128 * 1024) | |
78 | static unsigned long ndump = 64; | |
79 | static unsigned long nidump = 16; | |
80 | static unsigned long ncsum = 4096; | |
81 | static int termch; | |
82 | static char tmpstr[128]; | |
83 | ||
1da177e4 LT |
84 | static long bus_error_jmp[JMP_BUF_LEN]; |
85 | static int catch_memory_errors; | |
86 | static long *xmon_fault_jmp[NR_CPUS]; | |
1da177e4 LT |
87 | |
88 | /* Breakpoint stuff */ | |
89 | struct bpt { | |
90 | unsigned long address; | |
91 | unsigned int instr[2]; | |
92 | atomic_t ref_count; | |
93 | int enabled; | |
94 | unsigned long pad; | |
95 | }; | |
96 | ||
97 | /* Bits in bpt.enabled */ | |
abb90ee7 ME |
98 | #define BP_CIABR 1 |
99 | #define BP_TRAP 2 | |
100 | #define BP_DABR 4 | |
1da177e4 LT |
101 | |
102 | #define NBPTS 256 | |
103 | static struct bpt bpts[NBPTS]; | |
104 | static struct bpt dabr; | |
105 | static struct bpt *iabr; | |
106 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
107 | ||
108 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
109 | ||
110 | /* Prototypes */ | |
111 | static int cmds(struct pt_regs *); | |
112 | static int mread(unsigned long, void *, int); | |
113 | static int mwrite(unsigned long, void *, int); | |
114 | static int handle_fault(struct pt_regs *); | |
115 | static void byterev(unsigned char *, int); | |
116 | static void memex(void); | |
117 | static int bsesc(void); | |
118 | static void dump(void); | |
119 | static void prdump(unsigned long, long); | |
120 | static int ppc_inst_dump(unsigned long, long, int); | |
f312deb4 | 121 | static void dump_log_buf(void); |
1da177e4 LT |
122 | static void backtrace(struct pt_regs *); |
123 | static void excprint(struct pt_regs *); | |
124 | static void prregs(struct pt_regs *); | |
125 | static void memops(int); | |
126 | static void memlocate(void); | |
127 | static void memzcan(void); | |
128 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
129 | int skipbl(void); | |
130 | int scanhex(unsigned long *valp); | |
131 | static void scannl(void); | |
132 | static int hexdigit(int); | |
133 | void getstring(char *, int); | |
134 | static void flush_input(void); | |
135 | static int inchar(void); | |
136 | static void take_input(char *); | |
137 | static unsigned long read_spr(int); | |
138 | static void write_spr(int, unsigned long); | |
139 | static void super_regs(void); | |
140 | static void remove_bpts(void); | |
141 | static void insert_bpts(void); | |
142 | static void remove_cpu_bpts(void); | |
143 | static void insert_cpu_bpts(void); | |
144 | static struct bpt *at_breakpoint(unsigned long pc); | |
145 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
146 | static int do_step(struct pt_regs *); | |
147 | static void bpt_cmds(void); | |
148 | static void cacheflush(void); | |
149 | static int cpu_cmd(void); | |
150 | static void csum(void); | |
151 | static void bootcmds(void); | |
f78541dc | 152 | static void proccall(void); |
1da177e4 LT |
153 | void dump_segments(void); |
154 | static void symbol_lookup(void); | |
26c8af5f OH |
155 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
156 | unsigned long pc); | |
1da177e4 LT |
157 | static void xmon_print_symbol(unsigned long address, const char *mid, |
158 | const char *after); | |
159 | static const char *getvecname(unsigned long vec); | |
160 | ||
ff8a8f25 ME |
161 | static int do_spu_cmd(void); |
162 | ||
5a8a1a28 BH |
163 | #ifdef CONFIG_44x |
164 | static void dump_tlb_44x(void); | |
165 | #endif | |
03247157 BH |
166 | #ifdef CONFIG_PPC_BOOK3E |
167 | static void dump_tlb_book3e(void); | |
168 | #endif | |
5a8a1a28 | 169 | |
9f1067c2 | 170 | static int xmon_no_auto_backtrace; |
26c8af5f | 171 | |
f78541dc PM |
172 | extern void xmon_enter(void); |
173 | extern void xmon_leave(void); | |
174 | ||
f78541dc PM |
175 | #ifdef CONFIG_PPC64 |
176 | #define REG "%.16lx" | |
f78541dc PM |
177 | #else |
178 | #define REG "%.8lx" | |
f78541dc | 179 | #endif |
1da177e4 | 180 | |
72eceef6 PB |
181 | #ifdef __LITTLE_ENDIAN__ |
182 | #define GETWORD(v) (((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0]) | |
183 | #else | |
1da177e4 | 184 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
72eceef6 | 185 | #endif |
1da177e4 | 186 | |
1da177e4 LT |
187 | static char *help_string = "\ |
188 | Commands:\n\ | |
189 | b show breakpoints\n\ | |
190 | bd set data breakpoint\n\ | |
191 | bi set instruction breakpoint\n\ | |
192 | bc clear breakpoint\n" | |
193 | #ifdef CONFIG_SMP | |
194 | "\ | |
195 | c print cpus stopped in xmon\n\ | |
196 | c# try to switch to cpu number h (in hex)\n" | |
197 | #endif | |
198 | "\ | |
199 | C checksum\n\ | |
200 | d dump bytes\n\ | |
201 | di dump instructions\n\ | |
202 | df dump float values\n\ | |
203 | dd dump double values\n\ | |
ddadb6b8 ME |
204 | dl dump the kernel log buffer\n" |
205 | #ifdef CONFIG_PPC64 | |
206 | "\ | |
207 | dp[#] dump paca for current cpu, or cpu #\n\ | |
208 | dpa dump paca for all possible cpus\n" | |
209 | #endif | |
210 | "\ | |
7e5b5938 | 211 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
212 | e print exception information\n\ |
213 | f flush cache\n\ | |
214 | la lookup symbol+offset of specified address\n\ | |
215 | ls lookup address of specified symbol\n\ | |
216 | m examine/change memory\n\ | |
217 | mm move a block of memory\n\ | |
218 | ms set a block of memory\n\ | |
219 | md compare two blocks of memory\n\ | |
220 | ml locate a block of memory\n\ | |
221 | mz zero a block of memory\n\ | |
222 | mi show information about memory allocation\n\ | |
f78541dc | 223 | p call a procedure\n\ |
1da177e4 | 224 | r print registers\n\ |
ff8a8f25 | 225 | s single step\n" |
e055595d | 226 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 | 227 | " ss stop execution on all spus\n\ |
a8984970 | 228 | sr restore execution on stopped spus\n\ |
24a24c85 | 229 | sf # dump spu fields for spu # (in hex)\n\ |
c99176a2 | 230 | sd # dump spu local store for spu # (in hex)\n\ |
af89fb80 | 231 | sdi # disassemble spu local store for spu # (in hex)\n" |
ff8a8f25 ME |
232 | #endif |
233 | " S print special registers\n\ | |
1da177e4 | 234 | t print backtrace\n\ |
1da177e4 | 235 | x exit monitor and recover\n\ |
f78541dc | 236 | X exit monitor and dont recover\n" |
79873e8d | 237 | #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) |
f78541dc | 238 | " u dump segment table or SLB\n" |
79873e8d | 239 | #elif defined(CONFIG_PPC_STD_MMU_32) |
f78541dc | 240 | " u dump segment registers\n" |
79873e8d | 241 | #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) |
5a8a1a28 BH |
242 | " u dump TLB\n" |
243 | #endif | |
f78541dc | 244 | " ? help\n" |
0c23a88c | 245 | " # n limit output to n lines per page (for dp, dpa, dl)\n" |
f78541dc | 246 | " zr reboot\n\ |
1da177e4 LT |
247 | zh halt\n" |
248 | ; | |
249 | ||
250 | static struct pt_regs *xmon_regs; | |
251 | ||
f78541dc | 252 | static inline void sync(void) |
1da177e4 LT |
253 | { |
254 | asm volatile("sync; isync"); | |
255 | } | |
256 | ||
f78541dc PM |
257 | static inline void store_inst(void *p) |
258 | { | |
259 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
260 | } | |
261 | ||
262 | static inline void cflush(void *p) | |
263 | { | |
264 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
265 | } | |
266 | ||
267 | static inline void cinval(void *p) | |
268 | { | |
269 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
270 | } | |
1da177e4 | 271 | |
1ad7d705 AK |
272 | /** |
273 | * write_ciabr() - write the CIABR SPR | |
274 | * @ciabr: The value to write. | |
275 | * | |
276 | * This function writes a value to the CIARB register either directly | |
277 | * through mtspr instruction if the kernel is in HV privilege mode or | |
278 | * call a hypervisor function to achieve the same in case the kernel | |
279 | * is in supervisor privilege mode. | |
280 | */ | |
281 | static void write_ciabr(unsigned long ciabr) | |
282 | { | |
283 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
284 | return; | |
285 | ||
286 | if (cpu_has_feature(CPU_FTR_HVMODE)) { | |
287 | mtspr(SPRN_CIABR, ciabr); | |
288 | return; | |
289 | } | |
290 | plapr_set_ciabr(ciabr); | |
291 | } | |
292 | ||
293 | /** | |
294 | * set_ciabr() - set the CIABR | |
295 | * @addr: The value to set. | |
296 | * | |
297 | * This function sets the correct privilege value into the the HW | |
298 | * breakpoint address before writing it up in the CIABR register. | |
299 | */ | |
300 | static void set_ciabr(unsigned long addr) | |
301 | { | |
302 | addr &= ~CIABR_PRIV; | |
303 | ||
304 | if (cpu_has_feature(CPU_FTR_HVMODE)) | |
305 | addr |= CIABR_PRIV_HYPER; | |
306 | else | |
307 | addr |= CIABR_PRIV_SUPER; | |
308 | write_ciabr(addr); | |
309 | } | |
310 | ||
1da177e4 LT |
311 | /* |
312 | * Disable surveillance (the service processor watchdog function) | |
313 | * while we are in xmon. | |
314 | * XXX we should re-enable it when we leave. :) | |
315 | */ | |
316 | #define SURVEILLANCE_TOKEN 9000 | |
317 | ||
318 | static inline void disable_surveillance(void) | |
319 | { | |
320 | #ifdef CONFIG_PPC_PSERIES | |
321 | /* Since this can't be a module, args should end up below 4GB. */ | |
322 | static struct rtas_args args; | |
323 | ||
324 | /* | |
325 | * At this point we have got all the cpus we can into | |
326 | * xmon, so there is hopefully no other cpu calling RTAS | |
327 | * at the moment, even though we don't take rtas.lock. | |
328 | * If we did try to take rtas.lock there would be a | |
329 | * real possibility of deadlock. | |
330 | */ | |
331 | args.token = rtas_token("set-indicator"); | |
332 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
333 | return; | |
e6eb2eba | 334 | args.token = cpu_to_be32(args.token); |
3b8a3c01 LD |
335 | args.nargs = cpu_to_be32(3); |
336 | args.nret = cpu_to_be32(1); | |
1da177e4 | 337 | args.rets = &args.args[3]; |
3b8a3c01 | 338 | args.args[0] = cpu_to_be32(SURVEILLANCE_TOKEN); |
1da177e4 LT |
339 | args.args[1] = 0; |
340 | args.args[2] = 0; | |
341 | enter_rtas(__pa(&args)); | |
342 | #endif /* CONFIG_PPC_PSERIES */ | |
343 | } | |
344 | ||
345 | #ifdef CONFIG_SMP | |
346 | static int xmon_speaker; | |
347 | ||
348 | static void get_output_lock(void) | |
349 | { | |
350 | int me = smp_processor_id() + 0x100; | |
351 | int last_speaker = 0, prev; | |
352 | long timeout; | |
353 | ||
354 | if (xmon_speaker == me) | |
355 | return; | |
730efb61 | 356 | |
1da177e4 | 357 | for (;;) { |
730efb61 ME |
358 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
359 | if (last_speaker == 0) | |
360 | return; | |
361 | ||
15075897 ME |
362 | /* |
363 | * Wait a full second for the lock, we might be on a slow | |
364 | * console, but check every 100us. | |
365 | */ | |
366 | timeout = 10000; | |
1da177e4 | 367 | while (xmon_speaker == last_speaker) { |
15075897 ME |
368 | if (--timeout > 0) { |
369 | udelay(100); | |
1da177e4 | 370 | continue; |
15075897 ME |
371 | } |
372 | ||
1da177e4 LT |
373 | /* hostile takeover */ |
374 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
375 | if (prev == last_speaker) | |
376 | return; | |
377 | break; | |
378 | } | |
379 | } | |
380 | } | |
381 | ||
382 | static void release_output_lock(void) | |
383 | { | |
384 | xmon_speaker = 0; | |
385 | } | |
1c8950ff ME |
386 | |
387 | int cpus_are_in_xmon(void) | |
388 | { | |
104699c0 | 389 | return !cpumask_empty(&cpus_in_xmon); |
1c8950ff | 390 | } |
1da177e4 LT |
391 | #endif |
392 | ||
daf8f403 JB |
393 | static inline int unrecoverable_excp(struct pt_regs *regs) |
394 | { | |
08f6d6ab | 395 | #if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E) |
66857b3a | 396 | /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */ |
daf8f403 JB |
397 | return 0; |
398 | #else | |
399 | return ((regs->msr & MSR_RI) == 0); | |
400 | #endif | |
401 | } | |
402 | ||
b0da9856 | 403 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
404 | { |
405 | int cmd = 0; | |
1da177e4 LT |
406 | struct bpt *bp; |
407 | long recurse_jmp[JMP_BUF_LEN]; | |
408 | unsigned long offset; | |
f13659e0 | 409 | unsigned long flags; |
1da177e4 LT |
410 | #ifdef CONFIG_SMP |
411 | int cpu; | |
412 | int secondary; | |
413 | unsigned long timeout; | |
414 | #endif | |
415 | ||
f13659e0 | 416 | local_irq_save(flags); |
a71d64b4 | 417 | hard_irq_disable(); |
1da177e4 LT |
418 | |
419 | bp = in_breakpoint_table(regs->nip, &offset); | |
420 | if (bp != NULL) { | |
421 | regs->nip = bp->address + offset; | |
422 | atomic_dec(&bp->ref_count); | |
423 | } | |
424 | ||
425 | remove_cpu_bpts(); | |
426 | ||
427 | #ifdef CONFIG_SMP | |
428 | cpu = smp_processor_id(); | |
104699c0 | 429 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
430 | get_output_lock(); |
431 | excprint(regs); | |
432 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
433 | "returning to main loop\n", | |
434 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 435 | release_output_lock(); |
1da177e4 LT |
436 | longjmp(xmon_fault_jmp[cpu], 1); |
437 | } | |
438 | ||
439 | if (setjmp(recurse_jmp) != 0) { | |
440 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 441 | get_output_lock(); |
1da177e4 LT |
442 | printf("xmon: WARNING: bad recursive fault " |
443 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 444 | release_output_lock(); |
1da177e4 LT |
445 | goto waiting; |
446 | } | |
447 | secondary = !(xmon_taken && cpu == xmon_owner); | |
448 | goto cmdloop; | |
449 | } | |
450 | ||
451 | xmon_fault_jmp[cpu] = recurse_jmp; | |
1da177e4 LT |
452 | |
453 | bp = NULL; | |
9f0b0793 | 454 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
1da177e4 | 455 | bp = at_breakpoint(regs->nip); |
daf8f403 | 456 | if (bp || unrecoverable_excp(regs)) |
1da177e4 LT |
457 | fromipi = 0; |
458 | ||
459 | if (!fromipi) { | |
460 | get_output_lock(); | |
461 | excprint(regs); | |
462 | if (bp) { | |
736256e4 | 463 | printf("cpu 0x%x stopped at breakpoint 0x%lx (", |
1da177e4 LT |
464 | cpu, BP_NUM(bp)); |
465 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
466 | } | |
daf8f403 | 467 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
468 | printf("WARNING: exception is not recoverable, " |
469 | "can't continue\n"); | |
470 | release_output_lock(); | |
471 | } | |
472 | ||
d2b496e5 ME |
473 | cpumask_set_cpu(cpu, &cpus_in_xmon); |
474 | ||
1da177e4 LT |
475 | waiting: |
476 | secondary = 1; | |
477 | while (secondary && !xmon_gate) { | |
478 | if (in_xmon == 0) { | |
479 | if (fromipi) | |
480 | goto leave; | |
481 | secondary = test_and_set_bit(0, &in_xmon); | |
482 | } | |
483 | barrier(); | |
484 | } | |
485 | ||
486 | if (!secondary && !xmon_gate) { | |
487 | /* we are the first cpu to come in */ | |
488 | /* interrupt other cpu(s) */ | |
489 | int ncpus = num_online_cpus(); | |
490 | ||
491 | xmon_owner = cpu; | |
492 | mb(); | |
493 | if (ncpus > 1) { | |
e0476371 | 494 | smp_send_debugger_break(); |
1da177e4 LT |
495 | /* wait for other cpus to come in */ |
496 | for (timeout = 100000000; timeout != 0; --timeout) { | |
104699c0 | 497 | if (cpumask_weight(&cpus_in_xmon) >= ncpus) |
1da177e4 LT |
498 | break; |
499 | barrier(); | |
500 | } | |
501 | } | |
502 | remove_bpts(); | |
503 | disable_surveillance(); | |
504 | /* for breakpoint or single step, print the current instr. */ | |
505 | if (bp || TRAP(regs) == 0xd00) | |
506 | ppc_inst_dump(regs->nip, 1, 0); | |
507 | printf("enter ? for help\n"); | |
508 | mb(); | |
509 | xmon_gate = 1; | |
510 | barrier(); | |
511 | } | |
512 | ||
513 | cmdloop: | |
514 | while (in_xmon) { | |
515 | if (secondary) { | |
516 | if (cpu == xmon_owner) { | |
517 | if (!test_and_set_bit(0, &xmon_taken)) { | |
518 | secondary = 0; | |
519 | continue; | |
520 | } | |
521 | /* missed it */ | |
522 | while (cpu == xmon_owner) | |
523 | barrier(); | |
524 | } | |
525 | barrier(); | |
526 | } else { | |
527 | cmd = cmds(regs); | |
528 | if (cmd != 0) { | |
529 | /* exiting xmon */ | |
530 | insert_bpts(); | |
531 | xmon_gate = 0; | |
532 | wmb(); | |
533 | in_xmon = 0; | |
534 | break; | |
535 | } | |
536 | /* have switched to some other cpu */ | |
537 | secondary = 1; | |
538 | } | |
539 | } | |
540 | leave: | |
104699c0 | 541 | cpumask_clear_cpu(cpu, &cpus_in_xmon); |
1da177e4 | 542 | xmon_fault_jmp[cpu] = NULL; |
1da177e4 LT |
543 | #else |
544 | /* UP is simple... */ | |
545 | if (in_xmon) { | |
546 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
547 | regs->trap, getvecname(TRAP(regs))); | |
548 | longjmp(xmon_fault_jmp[0], 1); | |
549 | } | |
550 | if (setjmp(recurse_jmp) == 0) { | |
551 | xmon_fault_jmp[0] = recurse_jmp; | |
552 | in_xmon = 1; | |
553 | ||
554 | excprint(regs); | |
555 | bp = at_breakpoint(regs->nip); | |
556 | if (bp) { | |
736256e4 | 557 | printf("Stopped at breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
558 | xmon_print_symbol(regs->nip, " ", ")\n"); |
559 | } | |
daf8f403 | 560 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
561 | printf("WARNING: exception is not recoverable, " |
562 | "can't continue\n"); | |
563 | remove_bpts(); | |
564 | disable_surveillance(); | |
565 | /* for breakpoint or single step, print the current instr. */ | |
566 | if (bp || TRAP(regs) == 0xd00) | |
567 | ppc_inst_dump(regs->nip, 1, 0); | |
568 | printf("enter ? for help\n"); | |
569 | } | |
570 | ||
571 | cmd = cmds(regs); | |
572 | ||
573 | insert_bpts(); | |
574 | in_xmon = 0; | |
575 | #endif | |
576 | ||
cdd3904d JB |
577 | #ifdef CONFIG_BOOKE |
578 | if (regs->msr & MSR_DE) { | |
579 | bp = at_breakpoint(regs->nip); | |
580 | if (bp != NULL) { | |
581 | regs->nip = (unsigned long) &bp->instr[0]; | |
582 | atomic_inc(&bp->ref_count); | |
583 | } | |
584 | } | |
585 | #else | |
9f0b0793 | 586 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
587 | bp = at_breakpoint(regs->nip); |
588 | if (bp != NULL) { | |
589 | int stepped = emulate_step(regs, bp->instr[0]); | |
590 | if (stepped == 0) { | |
591 | regs->nip = (unsigned long) &bp->instr[0]; | |
592 | atomic_inc(&bp->ref_count); | |
593 | } else if (stepped < 0) { | |
594 | printf("Couldn't single-step %s instruction\n", | |
595 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
596 | } | |
597 | } | |
598 | } | |
cdd3904d | 599 | #endif |
1da177e4 LT |
600 | insert_cpu_bpts(); |
601 | ||
a71d64b4 | 602 | touch_nmi_watchdog(); |
f13659e0 | 603 | local_irq_restore(flags); |
1da177e4 | 604 | |
0a730ae5 | 605 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
606 | } |
607 | ||
608 | int xmon(struct pt_regs *excp) | |
609 | { | |
610 | struct pt_regs regs; | |
611 | ||
612 | if (excp == NULL) { | |
322b4394 | 613 | ppc_save_regs(®s); |
1da177e4 LT |
614 | excp = ®s; |
615 | } | |
ff8a8f25 | 616 | |
1da177e4 LT |
617 | return xmon_core(excp, 0); |
618 | } | |
f78541dc PM |
619 | EXPORT_SYMBOL(xmon); |
620 | ||
f583ffce | 621 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
622 | { |
623 | unsigned long flags; | |
624 | local_irq_save(flags); | |
625 | printf("Keyboard interrupt\n"); | |
f583ffce | 626 | xmon(get_irq_regs()); |
f78541dc PM |
627 | local_irq_restore(flags); |
628 | return IRQ_HANDLED; | |
629 | } | |
1da177e4 | 630 | |
b0da9856 | 631 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
632 | { |
633 | struct bpt *bp; | |
634 | unsigned long offset; | |
635 | ||
9f0b0793 | 636 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 LT |
637 | return 0; |
638 | ||
639 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
640 | bp = in_breakpoint_table(regs->nip, &offset); | |
641 | if (bp != NULL && offset == 4) { | |
642 | regs->nip = bp->address + 4; | |
643 | atomic_dec(&bp->ref_count); | |
644 | return 1; | |
645 | } | |
646 | ||
647 | /* Are we at a breakpoint? */ | |
648 | bp = at_breakpoint(regs->nip); | |
649 | if (!bp) | |
650 | return 0; | |
651 | ||
652 | xmon_core(regs, 0); | |
653 | ||
654 | return 1; | |
655 | } | |
656 | ||
b0da9856 | 657 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
658 | { |
659 | if (user_mode(regs)) | |
660 | return 0; | |
661 | xmon_core(regs, 0); | |
662 | return 1; | |
663 | } | |
664 | ||
9422de3e | 665 | static int xmon_break_match(struct pt_regs *regs) |
1da177e4 | 666 | { |
9f0b0793 | 667 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 668 | return 0; |
fd9648df AB |
669 | if (dabr.enabled == 0) |
670 | return 0; | |
1da177e4 LT |
671 | xmon_core(regs, 0); |
672 | return 1; | |
673 | } | |
674 | ||
b0da9856 | 675 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 | 676 | { |
9f0b0793 | 677 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 678 | return 0; |
9f1067c2 | 679 | if (iabr == NULL) |
1da177e4 LT |
680 | return 0; |
681 | xmon_core(regs, 0); | |
682 | return 1; | |
683 | } | |
684 | ||
b0da9856 | 685 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
686 | { |
687 | #ifdef CONFIG_SMP | |
104699c0 | 688 | if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
1da177e4 LT |
689 | xmon_core(regs, 1); |
690 | #endif | |
691 | return 0; | |
692 | } | |
693 | ||
b0da9856 | 694 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
695 | { |
696 | struct bpt *bp; | |
697 | unsigned long offset; | |
698 | ||
699 | if (in_xmon && catch_memory_errors) | |
700 | handle_fault(regs); /* doesn't return */ | |
701 | ||
9f0b0793 | 702 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
703 | bp = in_breakpoint_table(regs->nip, &offset); |
704 | if (bp != NULL) { | |
705 | regs->nip = bp->address + offset; | |
706 | atomic_dec(&bp->ref_count); | |
707 | } | |
708 | } | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
1da177e4 LT |
713 | static struct bpt *at_breakpoint(unsigned long pc) |
714 | { | |
715 | int i; | |
716 | struct bpt *bp; | |
717 | ||
718 | bp = bpts; | |
719 | for (i = 0; i < NBPTS; ++i, ++bp) | |
720 | if (bp->enabled && pc == bp->address) | |
721 | return bp; | |
722 | return NULL; | |
723 | } | |
724 | ||
725 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
726 | { | |
727 | unsigned long off; | |
728 | ||
729 | off = nip - (unsigned long) bpts; | |
730 | if (off >= sizeof(bpts)) | |
731 | return NULL; | |
732 | off %= sizeof(struct bpt); | |
733 | if (off != offsetof(struct bpt, instr[0]) | |
734 | && off != offsetof(struct bpt, instr[1])) | |
735 | return NULL; | |
736 | *offp = off - offsetof(struct bpt, instr[0]); | |
737 | return (struct bpt *) (nip - off); | |
738 | } | |
739 | ||
740 | static struct bpt *new_breakpoint(unsigned long a) | |
741 | { | |
742 | struct bpt *bp; | |
743 | ||
744 | a &= ~3UL; | |
745 | bp = at_breakpoint(a); | |
746 | if (bp) | |
747 | return bp; | |
748 | ||
749 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
750 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
751 | bp->address = a; | |
752 | bp->instr[1] = bpinstr; | |
753 | store_inst(&bp->instr[1]); | |
754 | return bp; | |
755 | } | |
756 | } | |
757 | ||
758 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
759 | return NULL; | |
760 | } | |
761 | ||
762 | static void insert_bpts(void) | |
763 | { | |
764 | int i; | |
765 | struct bpt *bp; | |
766 | ||
767 | bp = bpts; | |
768 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 769 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0) |
1da177e4 LT |
770 | continue; |
771 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
772 | printf("Couldn't read instruction at %lx, " | |
773 | "disabling breakpoint there\n", bp->address); | |
774 | bp->enabled = 0; | |
775 | continue; | |
776 | } | |
777 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
778 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
779 | "instruction, disabling it\n", bp->address); | |
780 | bp->enabled = 0; | |
781 | continue; | |
782 | } | |
783 | store_inst(&bp->instr[0]); | |
abb90ee7 | 784 | if (bp->enabled & BP_CIABR) |
1da177e4 LT |
785 | continue; |
786 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
787 | printf("Couldn't write instruction at %lx, " | |
788 | "disabling breakpoint there\n", bp->address); | |
789 | bp->enabled &= ~BP_TRAP; | |
790 | continue; | |
791 | } | |
792 | store_inst((void *)bp->address); | |
793 | } | |
794 | } | |
795 | ||
796 | static void insert_cpu_bpts(void) | |
797 | { | |
9422de3e MN |
798 | struct arch_hw_breakpoint brk; |
799 | ||
800 | if (dabr.enabled) { | |
801 | brk.address = dabr.address; | |
802 | brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL; | |
803 | brk.len = 8; | |
21f58507 | 804 | __set_breakpoint(&brk); |
9422de3e | 805 | } |
1ad7d705 AK |
806 | |
807 | if (iabr) | |
808 | set_ciabr(iabr->address); | |
1da177e4 LT |
809 | } |
810 | ||
811 | static void remove_bpts(void) | |
812 | { | |
813 | int i; | |
814 | struct bpt *bp; | |
815 | unsigned instr; | |
816 | ||
817 | bp = bpts; | |
818 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 819 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) != BP_TRAP) |
1da177e4 LT |
820 | continue; |
821 | if (mread(bp->address, &instr, 4) == 4 | |
822 | && instr == bpinstr | |
823 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
824 | printf("Couldn't remove breakpoint at %lx\n", | |
825 | bp->address); | |
826 | else | |
827 | store_inst((void *)bp->address); | |
828 | } | |
829 | } | |
830 | ||
831 | static void remove_cpu_bpts(void) | |
832 | { | |
9422de3e | 833 | hw_breakpoint_disable(); |
1ad7d705 | 834 | write_ciabr(0); |
1da177e4 LT |
835 | } |
836 | ||
958b7c80 S |
837 | static void set_lpp_cmd(void) |
838 | { | |
839 | unsigned long lpp; | |
840 | ||
841 | if (!scanhex(&lpp)) { | |
842 | printf("Invalid number.\n"); | |
843 | lpp = 0; | |
844 | } | |
845 | xmon_set_pagination_lpp(lpp); | |
846 | } | |
1da177e4 LT |
847 | /* Command interpreting routine */ |
848 | static char *last_cmd; | |
849 | ||
850 | static int | |
851 | cmds(struct pt_regs *excp) | |
852 | { | |
853 | int cmd = 0; | |
854 | ||
855 | last_cmd = NULL; | |
856 | xmon_regs = excp; | |
26c8af5f OH |
857 | |
858 | if (!xmon_no_auto_backtrace) { | |
859 | xmon_no_auto_backtrace = 1; | |
860 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
861 | } | |
862 | ||
1da177e4 LT |
863 | for(;;) { |
864 | #ifdef CONFIG_SMP | |
865 | printf("%x:", smp_processor_id()); | |
866 | #endif /* CONFIG_SMP */ | |
867 | printf("mon> "); | |
1da177e4 LT |
868 | flush_input(); |
869 | termch = 0; | |
870 | cmd = skipbl(); | |
871 | if( cmd == '\n' ) { | |
872 | if (last_cmd == NULL) | |
873 | continue; | |
874 | take_input(last_cmd); | |
875 | last_cmd = NULL; | |
876 | cmd = inchar(); | |
877 | } | |
878 | switch (cmd) { | |
879 | case 'm': | |
880 | cmd = inchar(); | |
881 | switch (cmd) { | |
882 | case 'm': | |
883 | case 's': | |
884 | case 'd': | |
885 | memops(cmd); | |
886 | break; | |
887 | case 'l': | |
888 | memlocate(); | |
889 | break; | |
890 | case 'z': | |
891 | memzcan(); | |
892 | break; | |
893 | case 'i': | |
b2b755b5 | 894 | show_mem(0); |
1da177e4 LT |
895 | break; |
896 | default: | |
897 | termch = cmd; | |
898 | memex(); | |
899 | } | |
900 | break; | |
901 | case 'd': | |
902 | dump(); | |
903 | break; | |
904 | case 'l': | |
905 | symbol_lookup(); | |
906 | break; | |
907 | case 'r': | |
908 | prregs(excp); /* print regs */ | |
909 | break; | |
910 | case 'e': | |
911 | excprint(excp); | |
912 | break; | |
913 | case 'S': | |
914 | super_regs(); | |
915 | break; | |
916 | case 't': | |
917 | backtrace(excp); | |
918 | break; | |
919 | case 'f': | |
920 | cacheflush(); | |
921 | break; | |
922 | case 's': | |
ff8a8f25 ME |
923 | if (do_spu_cmd() == 0) |
924 | break; | |
1da177e4 LT |
925 | if (do_step(excp)) |
926 | return cmd; | |
927 | break; | |
928 | case 'x': | |
929 | case 'X': | |
bb6b9b28 | 930 | return cmd; |
1da177e4 | 931 | case EOF: |
bb6b9b28 BH |
932 | printf(" <no input ...>\n"); |
933 | mdelay(2000); | |
1da177e4 LT |
934 | return cmd; |
935 | case '?': | |
4d404edc | 936 | xmon_puts(help_string); |
1da177e4 | 937 | break; |
958b7c80 S |
938 | case '#': |
939 | set_lpp_cmd(); | |
940 | break; | |
1da177e4 LT |
941 | case 'b': |
942 | bpt_cmds(); | |
943 | break; | |
944 | case 'C': | |
945 | csum(); | |
946 | break; | |
947 | case 'c': | |
948 | if (cpu_cmd()) | |
949 | return 0; | |
950 | break; | |
951 | case 'z': | |
952 | bootcmds(); | |
953 | break; | |
f78541dc PM |
954 | case 'p': |
955 | proccall(); | |
1da177e4 | 956 | break; |
f78541dc | 957 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
958 | case 'u': |
959 | dump_segments(); | |
960 | break; | |
d8ee6f34 | 961 | #elif defined(CONFIG_44x) |
5a8a1a28 BH |
962 | case 'u': |
963 | dump_tlb_44x(); | |
964 | break; | |
79873e8d | 965 | #elif defined(CONFIG_PPC_BOOK3E) |
03247157 BH |
966 | case 'u': |
967 | dump_tlb_book3e(); | |
968 | break; | |
f78541dc | 969 | #endif |
1da177e4 LT |
970 | default: |
971 | printf("Unrecognized command: "); | |
e3bc8049 | 972 | do { |
1da177e4 LT |
973 | if (' ' < cmd && cmd <= '~') |
974 | putchar(cmd); | |
975 | else | |
976 | printf("\\x%x", cmd); | |
977 | cmd = inchar(); | |
e3bc8049 | 978 | } while (cmd != '\n'); |
1da177e4 LT |
979 | printf(" (type ? for help)\n"); |
980 | break; | |
981 | } | |
982 | } | |
983 | } | |
984 | ||
cdd3904d JB |
985 | #ifdef CONFIG_BOOKE |
986 | static int do_step(struct pt_regs *regs) | |
987 | { | |
988 | regs->msr |= MSR_DE; | |
989 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
990 | return 1; | |
991 | } | |
992 | #else | |
1da177e4 LT |
993 | /* |
994 | * Step a single instruction. | |
995 | * Some instructions we emulate, others we execute with MSR_SE set. | |
996 | */ | |
997 | static int do_step(struct pt_regs *regs) | |
998 | { | |
999 | unsigned int instr; | |
1000 | int stepped; | |
1001 | ||
1002 | /* check we are in 64-bit kernel mode, translation enabled */ | |
9f0b0793 | 1003 | if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
1da177e4 LT |
1004 | if (mread(regs->nip, &instr, 4) == 4) { |
1005 | stepped = emulate_step(regs, instr); | |
1006 | if (stepped < 0) { | |
1007 | printf("Couldn't single-step %s instruction\n", | |
1008 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
1009 | return 0; | |
1010 | } | |
1011 | if (stepped > 0) { | |
1012 | regs->trap = 0xd00 | (regs->trap & 1); | |
1013 | printf("stepped to "); | |
1014 | xmon_print_symbol(regs->nip, " ", "\n"); | |
1015 | ppc_inst_dump(regs->nip, 1, 0); | |
1016 | return 0; | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | regs->msr |= MSR_SE; | |
1021 | return 1; | |
1022 | } | |
cdd3904d | 1023 | #endif |
1da177e4 LT |
1024 | |
1025 | static void bootcmds(void) | |
1026 | { | |
1027 | int cmd; | |
1028 | ||
1029 | cmd = inchar(); | |
1030 | if (cmd == 'r') | |
1031 | ppc_md.restart(NULL); | |
1032 | else if (cmd == 'h') | |
1033 | ppc_md.halt(); | |
1034 | else if (cmd == 'p') | |
9178ba29 AG |
1035 | if (pm_power_off) |
1036 | pm_power_off(); | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | static int cpu_cmd(void) | |
1040 | { | |
1041 | #ifdef CONFIG_SMP | |
fd3bb912 | 1042 | unsigned long cpu, first_cpu, last_cpu; |
1da177e4 | 1043 | int timeout; |
1da177e4 LT |
1044 | |
1045 | if (!scanhex(&cpu)) { | |
1046 | /* print cpus waiting or in xmon */ | |
1047 | printf("cpus stopped:"); | |
fd3bb912 | 1048 | last_cpu = first_cpu = NR_CPUS; |
bc1d7702 | 1049 | for_each_possible_cpu(cpu) { |
104699c0 | 1050 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
fd3bb912 PM |
1051 | if (cpu == last_cpu + 1) { |
1052 | last_cpu = cpu; | |
1053 | } else { | |
1054 | if (last_cpu != first_cpu) | |
736256e4 | 1055 | printf("-0x%lx", last_cpu); |
fd3bb912 | 1056 | last_cpu = first_cpu = cpu; |
736256e4 | 1057 | printf(" 0x%lx", cpu); |
fd3bb912 | 1058 | } |
1da177e4 LT |
1059 | } |
1060 | } | |
fd3bb912 | 1061 | if (last_cpu != first_cpu) |
736256e4 | 1062 | printf("-0x%lx", last_cpu); |
1da177e4 LT |
1063 | printf("\n"); |
1064 | return 0; | |
1065 | } | |
1066 | /* try to switch to cpu specified */ | |
104699c0 | 1067 | if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
1068 | printf("cpu 0x%x isn't in xmon\n", cpu); |
1069 | return 0; | |
1070 | } | |
1071 | xmon_taken = 0; | |
1072 | mb(); | |
1073 | xmon_owner = cpu; | |
1074 | timeout = 10000000; | |
1075 | while (!xmon_taken) { | |
1076 | if (--timeout == 0) { | |
1077 | if (test_and_set_bit(0, &xmon_taken)) | |
1078 | break; | |
1079 | /* take control back */ | |
1080 | mb(); | |
1081 | xmon_owner = smp_processor_id(); | |
736256e4 | 1082 | printf("cpu 0x%x didn't take control\n", cpu); |
1da177e4 LT |
1083 | return 0; |
1084 | } | |
1085 | barrier(); | |
1086 | } | |
1087 | return 1; | |
1088 | #else | |
1089 | return 0; | |
1090 | #endif /* CONFIG_SMP */ | |
1091 | } | |
1092 | ||
1093 | static unsigned short fcstab[256] = { | |
1094 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
1095 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
1096 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
1097 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
1098 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
1099 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
1100 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
1101 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
1102 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
1103 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
1104 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
1105 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
1106 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
1107 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
1108 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
1109 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
1110 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
1111 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
1112 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
1113 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
1114 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
1115 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1116 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1117 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1118 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1119 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1120 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1121 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1122 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1123 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1124 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1125 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1126 | }; | |
1127 | ||
1128 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1129 | ||
1130 | static void | |
1131 | csum(void) | |
1132 | { | |
1133 | unsigned int i; | |
1134 | unsigned short fcs; | |
1135 | unsigned char v; | |
1136 | ||
1137 | if (!scanhex(&adrs)) | |
1138 | return; | |
1139 | if (!scanhex(&ncsum)) | |
1140 | return; | |
1141 | fcs = 0xffff; | |
1142 | for (i = 0; i < ncsum; ++i) { | |
1143 | if (mread(adrs+i, &v, 1) == 0) { | |
736256e4 | 1144 | printf("csum stopped at "REG"\n", adrs+i); |
1da177e4 LT |
1145 | break; |
1146 | } | |
1147 | fcs = FCS(fcs, v); | |
1148 | } | |
1149 | printf("%x\n", fcs); | |
1150 | } | |
1151 | ||
1152 | /* | |
1153 | * Check if this is a suitable place to put a breakpoint. | |
1154 | */ | |
1155 | static long check_bp_loc(unsigned long addr) | |
1156 | { | |
1157 | unsigned int instr; | |
1158 | ||
1159 | addr &= ~3; | |
51fae6de | 1160 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1161 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1162 | return 0; | |
1163 | } | |
1164 | if (!mread(addr, &instr, sizeof(instr))) { | |
1165 | printf("Can't read instruction at address %lx\n", addr); | |
1166 | return 0; | |
1167 | } | |
1168 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1169 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1170 | "instructions\n"); | |
1171 | return 0; | |
1172 | } | |
1173 | return 1; | |
1174 | } | |
1175 | ||
e3bc8049 | 1176 | static char *breakpoint_help_string = |
1da177e4 LT |
1177 | "Breakpoint command usage:\n" |
1178 | "b show breakpoints\n" | |
1179 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1180 | "bc clear all breakpoints\n" | |
1181 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1ad7d705 | 1182 | "bi <addr> [cnt] set hardware instr breakpoint (POWER8 only)\n" |
1da177e4 LT |
1183 | "bd <addr> [cnt] set hardware data breakpoint\n" |
1184 | ""; | |
1185 | ||
1186 | static void | |
1187 | bpt_cmds(void) | |
1188 | { | |
1189 | int cmd; | |
1190 | unsigned long a; | |
1191 | int mode, i; | |
1192 | struct bpt *bp; | |
1193 | const char badaddr[] = "Only kernel addresses are permitted " | |
1194 | "for breakpoints\n"; | |
1195 | ||
1196 | cmd = inchar(); | |
1197 | switch (cmd) { | |
f78541dc | 1198 | #ifndef CONFIG_8xx |
1da177e4 LT |
1199 | case 'd': /* bd - hardware data breakpoint */ |
1200 | mode = 7; | |
1201 | cmd = inchar(); | |
1202 | if (cmd == 'r') | |
1203 | mode = 5; | |
1204 | else if (cmd == 'w') | |
1205 | mode = 6; | |
1206 | else | |
1207 | termch = cmd; | |
1208 | dabr.address = 0; | |
1209 | dabr.enabled = 0; | |
1210 | if (scanhex(&dabr.address)) { | |
51fae6de | 1211 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1212 | printf(badaddr); |
1213 | break; | |
1214 | } | |
9422de3e | 1215 | dabr.address &= ~HW_BRK_TYPE_DABR; |
1da177e4 LT |
1216 | dabr.enabled = mode | BP_DABR; |
1217 | } | |
1218 | break; | |
1219 | ||
1220 | case 'i': /* bi - hardware instr breakpoint */ | |
1ad7d705 | 1221 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { |
1da177e4 LT |
1222 | printf("Hardware instruction breakpoint " |
1223 | "not supported on this cpu\n"); | |
1224 | break; | |
1225 | } | |
1226 | if (iabr) { | |
abb90ee7 | 1227 | iabr->enabled &= ~BP_CIABR; |
1da177e4 LT |
1228 | iabr = NULL; |
1229 | } | |
1230 | if (!scanhex(&a)) | |
1231 | break; | |
1232 | if (!check_bp_loc(a)) | |
1233 | break; | |
1234 | bp = new_breakpoint(a); | |
1235 | if (bp != NULL) { | |
abb90ee7 | 1236 | bp->enabled |= BP_CIABR; |
1da177e4 LT |
1237 | iabr = bp; |
1238 | } | |
1239 | break; | |
f78541dc | 1240 | #endif |
1da177e4 LT |
1241 | |
1242 | case 'c': | |
1243 | if (!scanhex(&a)) { | |
1244 | /* clear all breakpoints */ | |
1245 | for (i = 0; i < NBPTS; ++i) | |
1246 | bpts[i].enabled = 0; | |
1247 | iabr = NULL; | |
1248 | dabr.enabled = 0; | |
1249 | printf("All breakpoints cleared\n"); | |
1250 | break; | |
1251 | } | |
1252 | ||
1253 | if (a <= NBPTS && a >= 1) { | |
1254 | /* assume a breakpoint number */ | |
1255 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1256 | } else { | |
1257 | /* assume a breakpoint address */ | |
1258 | bp = at_breakpoint(a); | |
9f1067c2 | 1259 | if (bp == NULL) { |
736256e4 | 1260 | printf("No breakpoint at %lx\n", a); |
1da177e4 LT |
1261 | break; |
1262 | } | |
1263 | } | |
1264 | ||
736256e4 | 1265 | printf("Cleared breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
1266 | xmon_print_symbol(bp->address, " ", ")\n"); |
1267 | bp->enabled = 0; | |
1268 | break; | |
1269 | ||
1270 | default: | |
1271 | termch = cmd; | |
e3bc8049 | 1272 | cmd = skipbl(); |
1da177e4 LT |
1273 | if (cmd == '?') { |
1274 | printf(breakpoint_help_string); | |
1275 | break; | |
1276 | } | |
1277 | termch = cmd; | |
1278 | if (!scanhex(&a)) { | |
1279 | /* print all breakpoints */ | |
1280 | printf(" type address\n"); | |
1281 | if (dabr.enabled) { | |
f78541dc | 1282 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1283 | if (dabr.enabled & 1) |
1284 | printf("r"); | |
1285 | if (dabr.enabled & 2) | |
1286 | printf("w"); | |
1287 | printf("]\n"); | |
1288 | } | |
1289 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1290 | if (!bp->enabled) | |
1291 | continue; | |
1292 | printf("%2x %s ", BP_NUM(bp), | |
abb90ee7 | 1293 | (bp->enabled & BP_CIABR) ? "inst": "trap"); |
1da177e4 LT |
1294 | xmon_print_symbol(bp->address, " ", "\n"); |
1295 | } | |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | if (!check_bp_loc(a)) | |
1300 | break; | |
1301 | bp = new_breakpoint(a); | |
1302 | if (bp != NULL) | |
1303 | bp->enabled |= BP_TRAP; | |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | /* Very cheap human name for vector lookup. */ | |
1309 | static | |
1310 | const char *getvecname(unsigned long vec) | |
1311 | { | |
1312 | char *ret; | |
1313 | ||
1314 | switch (vec) { | |
1315 | case 0x100: ret = "(System Reset)"; break; | |
1316 | case 0x200: ret = "(Machine Check)"; break; | |
1317 | case 0x300: ret = "(Data Access)"; break; | |
1318 | case 0x380: ret = "(Data SLB Access)"; break; | |
1319 | case 0x400: ret = "(Instruction Access)"; break; | |
1320 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1321 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1322 | case 0x600: ret = "(Alignment)"; break; | |
1323 | case 0x700: ret = "(Program Check)"; break; | |
1324 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1325 | case 0x900: ret = "(Decrementer)"; break; | |
660e034c ME |
1326 | case 0x980: ret = "(Hypervisor Decrementer)"; break; |
1327 | case 0xa00: ret = "(Doorbell)"; break; | |
1da177e4 LT |
1328 | case 0xc00: ret = "(System Call)"; break; |
1329 | case 0xd00: ret = "(Single Step)"; break; | |
660e034c ME |
1330 | case 0xe40: ret = "(Emulation Assist)"; break; |
1331 | case 0xe60: ret = "(HMI)"; break; | |
1332 | case 0xe80: ret = "(Hypervisor Doorbell)"; break; | |
1da177e4 LT |
1333 | case 0xf00: ret = "(Performance Monitor)"; break; |
1334 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1335 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
660e034c ME |
1336 | case 0x1500: ret = "(Denormalisation)"; break; |
1337 | case 0x1700: ret = "(Altivec Assist)"; break; | |
1da177e4 LT |
1338 | default: ret = ""; |
1339 | } | |
1340 | return ret; | |
1341 | } | |
1342 | ||
1343 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1344 | unsigned long *endp) | |
1345 | { | |
1346 | unsigned long size, offset; | |
1347 | const char *name; | |
1da177e4 LT |
1348 | |
1349 | *startp = *endp = 0; | |
1350 | if (pc == 0) | |
1351 | return; | |
1352 | if (setjmp(bus_error_jmp) == 0) { | |
1353 | catch_memory_errors = 1; | |
1354 | sync(); | |
ffb45122 | 1355 | name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
1da177e4 LT |
1356 | if (name != NULL) { |
1357 | *startp = pc - offset; | |
1358 | *endp = pc - offset + size; | |
1359 | } | |
1360 | sync(); | |
1361 | } | |
1362 | catch_memory_errors = 0; | |
1363 | } | |
1364 | ||
ec2b36b9 BH |
1365 | #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
1366 | #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) | |
1367 | ||
1da177e4 LT |
1368 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1369 | unsigned long pc) | |
1370 | { | |
0104cd68 | 1371 | int max_to_print = 64; |
1da177e4 LT |
1372 | unsigned long ip; |
1373 | unsigned long newsp; | |
1374 | unsigned long marker; | |
1da177e4 LT |
1375 | struct pt_regs regs; |
1376 | ||
0104cd68 | 1377 | while (max_to_print--) { |
1da177e4 LT |
1378 | if (sp < PAGE_OFFSET) { |
1379 | if (sp != 0) | |
1380 | printf("SP (%lx) is in userspace\n", sp); | |
1381 | break; | |
1382 | } | |
1383 | ||
f78541dc | 1384 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1385 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1386 | printf("Couldn't read stack frame at %lx\n", sp); | |
1387 | break; | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * For the first stack frame, try to work out if | |
1392 | * LR and/or the saved LR value in the bottommost | |
1393 | * stack frame are valid. | |
1394 | */ | |
1395 | if ((pc | lr) != 0) { | |
1396 | unsigned long fnstart, fnend; | |
1397 | unsigned long nextip; | |
1398 | int printip = 1; | |
1399 | ||
1400 | get_function_bounds(pc, &fnstart, &fnend); | |
1401 | nextip = 0; | |
1402 | if (newsp > sp) | |
f78541dc | 1403 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1404 | sizeof(unsigned long)); |
1405 | if (lr == ip) { | |
1406 | if (lr < PAGE_OFFSET | |
1407 | || (fnstart <= lr && lr < fnend)) | |
1408 | printip = 0; | |
1409 | } else if (lr == nextip) { | |
1410 | printip = 0; | |
1411 | } else if (lr >= PAGE_OFFSET | |
1412 | && !(fnstart <= lr && lr < fnend)) { | |
1413 | printf("[link register ] "); | |
1414 | xmon_print_symbol(lr, " ", "\n"); | |
1415 | } | |
1416 | if (printip) { | |
f78541dc | 1417 | printf("["REG"] ", sp); |
1da177e4 LT |
1418 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1419 | } | |
1420 | pc = lr = 0; | |
1421 | ||
1422 | } else { | |
f78541dc | 1423 | printf("["REG"] ", sp); |
1da177e4 LT |
1424 | xmon_print_symbol(ip, " ", "\n"); |
1425 | } | |
1426 | ||
1427 | /* Look for "regshere" marker to see if this is | |
1428 | an exception frame. */ | |
f78541dc | 1429 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
ec2b36b9 | 1430 | && marker == STACK_FRAME_REGS_MARKER) { |
c4de3809 | 1431 | if (mread(sp + STACK_FRAME_OVERHEAD, ®s, sizeof(regs)) |
1da177e4 LT |
1432 | != sizeof(regs)) { |
1433 | printf("Couldn't read registers at %lx\n", | |
c4de3809 | 1434 | sp + STACK_FRAME_OVERHEAD); |
1da177e4 LT |
1435 | break; |
1436 | } | |
e3bc8049 | 1437 | printf("--- Exception: %lx %s at ", regs.trap, |
1da177e4 LT |
1438 | getvecname(TRAP(®s))); |
1439 | pc = regs.nip; | |
1440 | lr = regs.link; | |
1441 | xmon_print_symbol(pc, " ", "\n"); | |
1442 | } | |
1443 | ||
1444 | if (newsp == 0) | |
1445 | break; | |
1446 | ||
1447 | sp = newsp; | |
0104cd68 | 1448 | } |
1da177e4 LT |
1449 | } |
1450 | ||
1451 | static void backtrace(struct pt_regs *excp) | |
1452 | { | |
1453 | unsigned long sp; | |
1454 | ||
1455 | if (scanhex(&sp)) | |
1456 | xmon_show_stack(sp, 0, 0); | |
1457 | else | |
1458 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1459 | scannl(); | |
1460 | } | |
1461 | ||
1462 | static void print_bug_trap(struct pt_regs *regs) | |
1463 | { | |
ebdba9af | 1464 | #ifdef CONFIG_BUG |
73c9ceab | 1465 | const struct bug_entry *bug; |
1da177e4 LT |
1466 | unsigned long addr; |
1467 | ||
1468 | if (regs->msr & MSR_PR) | |
1469 | return; /* not in kernel */ | |
1470 | addr = regs->nip; /* address of trap instruction */ | |
1471 | if (addr < PAGE_OFFSET) | |
1472 | return; | |
1473 | bug = find_bug(regs->nip); | |
1474 | if (bug == NULL) | |
1475 | return; | |
73c9ceab | 1476 | if (is_warning_bug(bug)) |
1da177e4 LT |
1477 | return; |
1478 | ||
0a7c7efc | 1479 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
73c9ceab JF |
1480 | printf("kernel BUG at %s:%u!\n", |
1481 | bug->file, bug->line); | |
0a7c7efc SR |
1482 | #else |
1483 | printf("kernel BUG at %p!\n", (void *)bug->bug_addr); | |
1484 | #endif | |
ebdba9af | 1485 | #endif /* CONFIG_BUG */ |
1da177e4 LT |
1486 | } |
1487 | ||
9f1067c2 | 1488 | static void excprint(struct pt_regs *fp) |
1da177e4 LT |
1489 | { |
1490 | unsigned long trap; | |
1491 | ||
1492 | #ifdef CONFIG_SMP | |
1493 | printf("cpu 0x%x: ", smp_processor_id()); | |
1494 | #endif /* CONFIG_SMP */ | |
1495 | ||
1496 | trap = TRAP(fp); | |
1497 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1498 | printf(" pc: "); | |
1499 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1500 | ||
1501 | printf(" lr: ", fp->link); | |
1502 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1503 | ||
1504 | printf(" sp: %lx\n", fp->gpr[1]); | |
1505 | printf(" msr: %lx\n", fp->msr); | |
1506 | ||
ce54152f | 1507 | if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) { |
1da177e4 LT |
1508 | printf(" dar: %lx\n", fp->dar); |
1509 | if (trap != 0x380) | |
1510 | printf(" dsisr: %lx\n", fp->dsisr); | |
1511 | } | |
1512 | ||
1513 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1514 | #ifdef CONFIG_PPC64 |
7230c564 BH |
1515 | printf(" paca = 0x%lx\t softe: %d\t irq_happened: 0x%02x\n", |
1516 | local_paca, local_paca->soft_enabled, local_paca->irq_happened); | |
f78541dc | 1517 | #endif |
1da177e4 LT |
1518 | if (current) { |
1519 | printf(" pid = %ld, comm = %s\n", | |
1520 | current->pid, current->comm); | |
1521 | } | |
1522 | ||
1523 | if (trap == 0x700) | |
1524 | print_bug_trap(fp); | |
1525 | } | |
1526 | ||
9f1067c2 | 1527 | static void prregs(struct pt_regs *fp) |
1da177e4 | 1528 | { |
f78541dc | 1529 | int n, trap; |
1da177e4 LT |
1530 | unsigned long base; |
1531 | struct pt_regs regs; | |
1532 | ||
1533 | if (scanhex(&base)) { | |
1534 | if (setjmp(bus_error_jmp) == 0) { | |
1535 | catch_memory_errors = 1; | |
1536 | sync(); | |
1537 | regs = *(struct pt_regs *)base; | |
1538 | sync(); | |
1539 | __delay(200); | |
1540 | } else { | |
1541 | catch_memory_errors = 0; | |
f78541dc | 1542 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1543 | base); |
1544 | return; | |
1545 | } | |
1546 | catch_memory_errors = 0; | |
1547 | fp = ®s; | |
1548 | } | |
1549 | ||
f78541dc | 1550 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1551 | if (FULL_REGS(fp)) { |
1552 | for (n = 0; n < 16; ++n) | |
f78541dc | 1553 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1554 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1555 | } else { | |
1556 | for (n = 0; n < 7; ++n) | |
f78541dc | 1557 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1558 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1559 | } | |
f78541dc PM |
1560 | #else |
1561 | for (n = 0; n < 32; ++n) { | |
1562 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1563 | (n & 3) == 3? "\n": " "); | |
1564 | if (n == 12 && !FULL_REGS(fp)) { | |
1565 | printf("\n"); | |
1566 | break; | |
1567 | } | |
1568 | } | |
1569 | #endif | |
1da177e4 LT |
1570 | printf("pc = "); |
1571 | xmon_print_symbol(fp->nip, " ", "\n"); | |
48404f2e PM |
1572 | if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
1573 | printf("cfar= "); | |
1574 | xmon_print_symbol(fp->orig_gpr3, " ", "\n"); | |
1575 | } | |
1da177e4 LT |
1576 | printf("lr = "); |
1577 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1578 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1579 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1580 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1581 | trap = TRAP(fp); |
1582 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1583 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1584 | } |
1585 | ||
9f1067c2 | 1586 | static void cacheflush(void) |
1da177e4 LT |
1587 | { |
1588 | int cmd; | |
1589 | unsigned long nflush; | |
1590 | ||
1591 | cmd = inchar(); | |
1592 | if (cmd != 'i') | |
1593 | termch = cmd; | |
1594 | scanhex((void *)&adrs); | |
1595 | if (termch != '\n') | |
1596 | termch = 0; | |
1597 | nflush = 1; | |
1598 | scanhex(&nflush); | |
1599 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1600 | if (setjmp(bus_error_jmp) == 0) { | |
1601 | catch_memory_errors = 1; | |
1602 | sync(); | |
1603 | ||
1604 | if (cmd != 'i') { | |
1605 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1606 | cflush((void *) adrs); | |
1607 | } else { | |
1608 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1609 | cinval((void *) adrs); | |
1610 | } | |
1611 | sync(); | |
1612 | /* wait a little while to see if we get a machine check */ | |
1613 | __delay(200); | |
1614 | } | |
1615 | catch_memory_errors = 0; | |
1616 | } | |
1617 | ||
9f1067c2 | 1618 | static unsigned long |
1da177e4 LT |
1619 | read_spr(int n) |
1620 | { | |
1621 | unsigned int instrs[2]; | |
1622 | unsigned long (*code)(void); | |
1da177e4 | 1623 | unsigned long ret = -1UL; |
548ccebc PM |
1624 | #ifdef CONFIG_PPC64 |
1625 | unsigned long opd[3]; | |
1da177e4 | 1626 | |
1da177e4 LT |
1627 | opd[0] = (unsigned long)instrs; |
1628 | opd[1] = 0; | |
1629 | opd[2] = 0; | |
548ccebc PM |
1630 | code = (unsigned long (*)(void)) opd; |
1631 | #else | |
1632 | code = (unsigned long (*)(void)) instrs; | |
1633 | #endif | |
1634 | ||
1635 | /* mfspr r3,n; blr */ | |
1636 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1637 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1638 | store_inst(instrs); |
1639 | store_inst(instrs+1); | |
1da177e4 LT |
1640 | |
1641 | if (setjmp(bus_error_jmp) == 0) { | |
1642 | catch_memory_errors = 1; | |
1643 | sync(); | |
1644 | ||
1645 | ret = code(); | |
1646 | ||
1647 | sync(); | |
1648 | /* wait a little while to see if we get a machine check */ | |
1649 | __delay(200); | |
1650 | n = size; | |
1651 | } | |
1652 | ||
1653 | return ret; | |
1654 | } | |
1655 | ||
9f1067c2 | 1656 | static void |
1da177e4 LT |
1657 | write_spr(int n, unsigned long val) |
1658 | { | |
1659 | unsigned int instrs[2]; | |
1660 | unsigned long (*code)(unsigned long); | |
548ccebc | 1661 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1662 | unsigned long opd[3]; |
1663 | ||
1da177e4 LT |
1664 | opd[0] = (unsigned long)instrs; |
1665 | opd[1] = 0; | |
1666 | opd[2] = 0; | |
548ccebc PM |
1667 | code = (unsigned long (*)(unsigned long)) opd; |
1668 | #else | |
1669 | code = (unsigned long (*)(unsigned long)) instrs; | |
1670 | #endif | |
1671 | ||
1672 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1673 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1674 | store_inst(instrs); |
1675 | store_inst(instrs+1); | |
1da177e4 LT |
1676 | |
1677 | if (setjmp(bus_error_jmp) == 0) { | |
1678 | catch_memory_errors = 1; | |
1679 | sync(); | |
1680 | ||
1681 | code(val); | |
1682 | ||
1683 | sync(); | |
1684 | /* wait a little while to see if we get a machine check */ | |
1685 | __delay(200); | |
1686 | n = size; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | static unsigned long regno; | |
1691 | extern char exc_prolog; | |
1692 | extern char dec_exc; | |
1693 | ||
9f1067c2 | 1694 | static void super_regs(void) |
1da177e4 LT |
1695 | { |
1696 | int cmd; | |
1697 | unsigned long val; | |
1da177e4 LT |
1698 | |
1699 | cmd = skipbl(); | |
1700 | if (cmd == '\n') { | |
e3bc8049 | 1701 | unsigned long sp, toc; |
1da177e4 LT |
1702 | asm("mr %0,1" : "=r" (sp) :); |
1703 | asm("mr %0,2" : "=r" (toc) :); | |
1704 | ||
f78541dc PM |
1705 | printf("msr = "REG" sprg0= "REG"\n", |
1706 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1707 | printf("pvr = "REG" sprg1= "REG"\n", | |
e3bc8049 | 1708 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
f78541dc PM |
1709 | printf("dec = "REG" sprg2= "REG"\n", |
1710 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1711 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1712 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 LT |
1713 | |
1714 | return; | |
1715 | } | |
1716 | ||
1717 | scanhex(®no); | |
1718 | switch (cmd) { | |
1719 | case 'w': | |
1720 | val = read_spr(regno); | |
1721 | scanhex(&val); | |
1722 | write_spr(regno, val); | |
1723 | /* fall through */ | |
1724 | case 'r': | |
1725 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1726 | break; | |
1da177e4 LT |
1727 | } |
1728 | scannl(); | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * Stuff for reading and writing memory safely | |
1733 | */ | |
9f1067c2 | 1734 | static int |
1da177e4 LT |
1735 | mread(unsigned long adrs, void *buf, int size) |
1736 | { | |
1737 | volatile int n; | |
1738 | char *p, *q; | |
1739 | ||
1740 | n = 0; | |
1741 | if (setjmp(bus_error_jmp) == 0) { | |
1742 | catch_memory_errors = 1; | |
1743 | sync(); | |
1744 | p = (char *)adrs; | |
1745 | q = (char *)buf; | |
1746 | switch (size) { | |
1747 | case 2: | |
f78541dc | 1748 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1749 | break; |
1750 | case 4: | |
f78541dc | 1751 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1752 | break; |
1753 | case 8: | |
f78541dc | 1754 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1755 | break; |
1756 | default: | |
1757 | for( ; n < size; ++n) { | |
1758 | *q++ = *p++; | |
1759 | sync(); | |
1760 | } | |
1761 | } | |
1762 | sync(); | |
1763 | /* wait a little while to see if we get a machine check */ | |
1764 | __delay(200); | |
1765 | n = size; | |
1766 | } | |
1767 | catch_memory_errors = 0; | |
1768 | return n; | |
1769 | } | |
1770 | ||
9f1067c2 | 1771 | static int |
1da177e4 LT |
1772 | mwrite(unsigned long adrs, void *buf, int size) |
1773 | { | |
1774 | volatile int n; | |
1775 | char *p, *q; | |
1776 | ||
1777 | n = 0; | |
1778 | if (setjmp(bus_error_jmp) == 0) { | |
1779 | catch_memory_errors = 1; | |
1780 | sync(); | |
1781 | p = (char *) adrs; | |
1782 | q = (char *) buf; | |
1783 | switch (size) { | |
1784 | case 2: | |
f78541dc | 1785 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1786 | break; |
1787 | case 4: | |
f78541dc | 1788 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1789 | break; |
1790 | case 8: | |
f78541dc | 1791 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1792 | break; |
1793 | default: | |
1794 | for ( ; n < size; ++n) { | |
1795 | *p++ = *q++; | |
1796 | sync(); | |
1797 | } | |
1798 | } | |
1799 | sync(); | |
1800 | /* wait a little while to see if we get a machine check */ | |
1801 | __delay(200); | |
1802 | n = size; | |
1803 | } else { | |
736256e4 | 1804 | printf("*** Error writing address "REG"\n", adrs + n); |
1da177e4 LT |
1805 | } |
1806 | catch_memory_errors = 0; | |
1807 | return n; | |
1808 | } | |
1809 | ||
1810 | static int fault_type; | |
f78541dc | 1811 | static int fault_except; |
1da177e4 LT |
1812 | static char *fault_chars[] = { "--", "**", "##" }; |
1813 | ||
f78541dc | 1814 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1815 | { |
f78541dc | 1816 | fault_except = TRAP(regs); |
1da177e4 LT |
1817 | switch (TRAP(regs)) { |
1818 | case 0x200: | |
1819 | fault_type = 0; | |
1820 | break; | |
1821 | case 0x300: | |
1822 | case 0x380: | |
1823 | fault_type = 1; | |
1824 | break; | |
1825 | default: | |
1826 | fault_type = 2; | |
1827 | } | |
1828 | ||
1829 | longjmp(bus_error_jmp, 1); | |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1835 | ||
9f1067c2 | 1836 | static void |
1da177e4 LT |
1837 | byterev(unsigned char *val, int size) |
1838 | { | |
1839 | int t; | |
1840 | ||
1841 | switch (size) { | |
1842 | case 2: | |
1843 | SWAP(val[0], val[1], t); | |
1844 | break; | |
1845 | case 4: | |
1846 | SWAP(val[0], val[3], t); | |
1847 | SWAP(val[1], val[2], t); | |
1848 | break; | |
1849 | case 8: /* is there really any use for this? */ | |
1850 | SWAP(val[0], val[7], t); | |
1851 | SWAP(val[1], val[6], t); | |
1852 | SWAP(val[2], val[5], t); | |
1853 | SWAP(val[3], val[4], t); | |
1854 | break; | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | static int brev; | |
1859 | static int mnoread; | |
1860 | ||
e3bc8049 | 1861 | static char *memex_help_string = |
1da177e4 LT |
1862 | "Memory examine command usage:\n" |
1863 | "m [addr] [flags] examine/change memory\n" | |
1864 | " addr is optional. will start where left off.\n" | |
1865 | " flags may include chars from this set:\n" | |
1866 | " b modify by bytes (default)\n" | |
1867 | " w modify by words (2 byte)\n" | |
1868 | " l modify by longs (4 byte)\n" | |
1869 | " d modify by doubleword (8 byte)\n" | |
1870 | " r toggle reverse byte order mode\n" | |
1871 | " n do not read memory (for i/o spaces)\n" | |
1872 | " . ok to read (default)\n" | |
1873 | "NOTE: flags are saved as defaults\n" | |
1874 | ""; | |
1875 | ||
e3bc8049 | 1876 | static char *memex_subcmd_help_string = |
1da177e4 LT |
1877 | "Memory examine subcommands:\n" |
1878 | " hexval write this val to current location\n" | |
1879 | " 'string' write chars from string to this location\n" | |
1880 | " ' increment address\n" | |
1881 | " ^ decrement address\n" | |
1882 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1883 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1884 | " ` clear no-read flag\n" | |
1885 | " ; stay at this addr\n" | |
1886 | " v change to byte mode\n" | |
1887 | " w change to word (2 byte) mode\n" | |
1888 | " l change to long (4 byte) mode\n" | |
1889 | " u change to doubleword (8 byte) mode\n" | |
1890 | " m addr change current addr\n" | |
1891 | " n toggle no-read flag\n" | |
1892 | " r toggle byte reverse flag\n" | |
1893 | " < count back up count bytes\n" | |
1894 | " > count skip forward count bytes\n" | |
1895 | " x exit this mode\n" | |
1896 | ""; | |
1897 | ||
9f1067c2 | 1898 | static void |
1da177e4 LT |
1899 | memex(void) |
1900 | { | |
1901 | int cmd, inc, i, nslash; | |
1902 | unsigned long n; | |
1903 | unsigned char val[16]; | |
1904 | ||
1905 | scanhex((void *)&adrs); | |
1906 | cmd = skipbl(); | |
1907 | if (cmd == '?') { | |
1908 | printf(memex_help_string); | |
1909 | return; | |
1910 | } else { | |
1911 | termch = cmd; | |
1912 | } | |
1913 | last_cmd = "m\n"; | |
1914 | while ((cmd = skipbl()) != '\n') { | |
1915 | switch( cmd ){ | |
1916 | case 'b': size = 1; break; | |
1917 | case 'w': size = 2; break; | |
1918 | case 'l': size = 4; break; | |
1919 | case 'd': size = 8; break; | |
1920 | case 'r': brev = !brev; break; | |
1921 | case 'n': mnoread = 1; break; | |
1922 | case '.': mnoread = 0; break; | |
1923 | } | |
1924 | } | |
1925 | if( size <= 0 ) | |
1926 | size = 1; | |
1927 | else if( size > 8 ) | |
1928 | size = 8; | |
1929 | for(;;){ | |
1930 | if (!mnoread) | |
1931 | n = mread(adrs, val, size); | |
e1449ed9 | 1932 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1933 | if (!mnoread) { |
1934 | if (brev) | |
1935 | byterev(val, size); | |
1936 | putchar(' '); | |
1937 | for (i = 0; i < n; ++i) | |
1938 | printf("%.2x", val[i]); | |
1939 | for (; i < size; ++i) | |
1940 | printf("%s", fault_chars[fault_type]); | |
1941 | } | |
1942 | putchar(' '); | |
1943 | inc = size; | |
1944 | nslash = 0; | |
1945 | for(;;){ | |
1946 | if( scanhex(&n) ){ | |
1947 | for (i = 0; i < size; ++i) | |
1948 | val[i] = n >> (i * 8); | |
1949 | if (!brev) | |
1950 | byterev(val, size); | |
1951 | mwrite(adrs, val, size); | |
1952 | inc = size; | |
1953 | } | |
1954 | cmd = skipbl(); | |
1955 | if (cmd == '\n') | |
1956 | break; | |
1957 | inc = 0; | |
1958 | switch (cmd) { | |
1959 | case '\'': | |
1960 | for(;;){ | |
1961 | n = inchar(); | |
1962 | if( n == '\\' ) | |
1963 | n = bsesc(); | |
1964 | else if( n == '\'' ) | |
1965 | break; | |
1966 | for (i = 0; i < size; ++i) | |
1967 | val[i] = n >> (i * 8); | |
1968 | if (!brev) | |
1969 | byterev(val, size); | |
1970 | mwrite(adrs, val, size); | |
1971 | adrs += size; | |
1972 | } | |
1973 | adrs -= size; | |
1974 | inc = size; | |
1975 | break; | |
1976 | case ',': | |
1977 | adrs += size; | |
1978 | break; | |
1979 | case '.': | |
1980 | mnoread = 0; | |
1981 | break; | |
1982 | case ';': | |
1983 | break; | |
1984 | case 'x': | |
1985 | case EOF: | |
1986 | scannl(); | |
1987 | return; | |
1988 | case 'b': | |
1989 | case 'v': | |
1990 | size = 1; | |
1991 | break; | |
1992 | case 'w': | |
1993 | size = 2; | |
1994 | break; | |
1995 | case 'l': | |
1996 | size = 4; | |
1997 | break; | |
1998 | case 'u': | |
1999 | size = 8; | |
2000 | break; | |
2001 | case '^': | |
2002 | adrs -= size; | |
2003 | break; | |
1da177e4 LT |
2004 | case '/': |
2005 | if (nslash > 0) | |
2006 | adrs -= 1 << nslash; | |
2007 | else | |
2008 | nslash = 0; | |
2009 | nslash += 4; | |
2010 | adrs += 1 << nslash; | |
2011 | break; | |
2012 | case '\\': | |
2013 | if (nslash < 0) | |
2014 | adrs += 1 << -nslash; | |
2015 | else | |
2016 | nslash = 0; | |
2017 | nslash -= 4; | |
2018 | adrs -= 1 << -nslash; | |
2019 | break; | |
2020 | case 'm': | |
2021 | scanhex((void *)&adrs); | |
2022 | break; | |
2023 | case 'n': | |
2024 | mnoread = 1; | |
2025 | break; | |
2026 | case 'r': | |
2027 | brev = !brev; | |
2028 | break; | |
2029 | case '<': | |
2030 | n = size; | |
2031 | scanhex(&n); | |
2032 | adrs -= n; | |
2033 | break; | |
2034 | case '>': | |
2035 | n = size; | |
2036 | scanhex(&n); | |
2037 | adrs += n; | |
2038 | break; | |
2039 | case '?': | |
2040 | printf(memex_subcmd_help_string); | |
2041 | break; | |
2042 | } | |
2043 | } | |
2044 | adrs += inc; | |
2045 | } | |
2046 | } | |
2047 | ||
9f1067c2 | 2048 | static int |
1da177e4 LT |
2049 | bsesc(void) |
2050 | { | |
2051 | int c; | |
2052 | ||
2053 | c = inchar(); | |
2054 | switch( c ){ | |
2055 | case 'n': c = '\n'; break; | |
2056 | case 'r': c = '\r'; break; | |
2057 | case 'b': c = '\b'; break; | |
2058 | case 't': c = '\t'; break; | |
2059 | } | |
2060 | return c; | |
2061 | } | |
2062 | ||
7e5b5938 OH |
2063 | static void xmon_rawdump (unsigned long adrs, long ndump) |
2064 | { | |
2065 | long n, m, r, nr; | |
2066 | unsigned char temp[16]; | |
2067 | ||
2068 | for (n = ndump; n > 0;) { | |
2069 | r = n < 16? n: 16; | |
2070 | nr = mread(adrs, temp, r); | |
2071 | adrs += nr; | |
2072 | for (m = 0; m < r; ++m) { | |
2073 | if (m < nr) | |
2074 | printf("%.2x", temp[m]); | |
2075 | else | |
2076 | printf("%s", fault_chars[fault_type]); | |
2077 | } | |
2078 | n -= r; | |
2079 | if (nr < r) | |
2080 | break; | |
2081 | } | |
2082 | printf("\n"); | |
2083 | } | |
2084 | ||
ddadb6b8 ME |
2085 | #ifdef CONFIG_PPC64 |
2086 | static void dump_one_paca(int cpu) | |
2087 | { | |
2088 | struct paca_struct *p; | |
2089 | ||
2090 | if (setjmp(bus_error_jmp) != 0) { | |
2091 | printf("*** Error dumping paca for cpu 0x%x!\n", cpu); | |
2092 | return; | |
2093 | } | |
2094 | ||
2095 | catch_memory_errors = 1; | |
2096 | sync(); | |
2097 | ||
2098 | p = &paca[cpu]; | |
2099 | ||
2100 | printf("paca for cpu 0x%x @ %p:\n", cpu, p); | |
2101 | ||
2102 | printf(" %-*s = %s\n", 16, "possible", cpu_possible(cpu) ? "yes" : "no"); | |
2103 | printf(" %-*s = %s\n", 16, "present", cpu_present(cpu) ? "yes" : "no"); | |
2104 | printf(" %-*s = %s\n", 16, "online", cpu_online(cpu) ? "yes" : "no"); | |
2105 | ||
2106 | #define DUMP(paca, name, format) \ | |
2107 | printf(" %-*s = %#-*"format"\t(0x%lx)\n", 16, #name, 18, paca->name, \ | |
2108 | offsetof(struct paca_struct, name)); | |
2109 | ||
2110 | DUMP(p, lock_token, "x"); | |
2111 | DUMP(p, paca_index, "x"); | |
2112 | DUMP(p, kernel_toc, "lx"); | |
2113 | DUMP(p, kernelbase, "lx"); | |
2114 | DUMP(p, kernel_msr, "lx"); | |
ddadb6b8 | 2115 | DUMP(p, emergency_sp, "p"); |
729b0f71 MS |
2116 | #ifdef CONFIG_PPC_BOOK3S_64 |
2117 | DUMP(p, mc_emergency_sp, "p"); | |
2118 | DUMP(p, in_mce, "x"); | |
2119 | #endif | |
ddadb6b8 ME |
2120 | DUMP(p, data_offset, "lx"); |
2121 | DUMP(p, hw_cpu_id, "x"); | |
2122 | DUMP(p, cpu_start, "x"); | |
2123 | DUMP(p, kexec_state, "x"); | |
2124 | DUMP(p, __current, "p"); | |
2125 | DUMP(p, kstack, "lx"); | |
2126 | DUMP(p, stab_rr, "lx"); | |
2127 | DUMP(p, saved_r1, "lx"); | |
2128 | DUMP(p, trap_save, "x"); | |
2129 | DUMP(p, soft_enabled, "x"); | |
2130 | DUMP(p, irq_happened, "x"); | |
2131 | DUMP(p, io_sync, "x"); | |
2132 | DUMP(p, irq_work_pending, "x"); | |
2133 | DUMP(p, nap_state_lost, "x"); | |
2134 | ||
2135 | #undef DUMP | |
2136 | ||
2137 | catch_memory_errors = 0; | |
2138 | sync(); | |
2139 | } | |
2140 | ||
2141 | static void dump_all_pacas(void) | |
2142 | { | |
2143 | int cpu; | |
2144 | ||
2145 | if (num_possible_cpus() == 0) { | |
2146 | printf("No possible cpus, use 'dp #' to dump individual cpus\n"); | |
2147 | return; | |
2148 | } | |
2149 | ||
2150 | for_each_possible_cpu(cpu) | |
2151 | dump_one_paca(cpu); | |
2152 | } | |
2153 | ||
2154 | static void dump_pacas(void) | |
2155 | { | |
2156 | unsigned long num; | |
2157 | int c; | |
2158 | ||
2159 | c = inchar(); | |
2160 | if (c == 'a') { | |
2161 | dump_all_pacas(); | |
2162 | return; | |
2163 | } | |
2164 | ||
2165 | termch = c; /* Put c back, it wasn't 'a' */ | |
2166 | ||
2167 | if (scanhex(&num)) | |
2168 | dump_one_paca(num); | |
2169 | else | |
2170 | dump_one_paca(xmon_owner); | |
2171 | } | |
2172 | #endif | |
2173 | ||
9f1067c2 | 2174 | static void |
1da177e4 LT |
2175 | dump(void) |
2176 | { | |
2177 | int c; | |
2178 | ||
2179 | c = inchar(); | |
ddadb6b8 ME |
2180 | |
2181 | #ifdef CONFIG_PPC64 | |
2182 | if (c == 'p') { | |
958b7c80 | 2183 | xmon_start_pagination(); |
ddadb6b8 | 2184 | dump_pacas(); |
958b7c80 | 2185 | xmon_end_pagination(); |
ddadb6b8 ME |
2186 | return; |
2187 | } | |
2188 | #endif | |
2189 | ||
1da177e4 LT |
2190 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
2191 | termch = c; | |
2192 | scanhex((void *)&adrs); | |
2193 | if (termch != '\n') | |
2194 | termch = 0; | |
2195 | if (c == 'i') { | |
2196 | scanhex(&nidump); | |
2197 | if (nidump == 0) | |
2198 | nidump = 16; | |
2199 | else if (nidump > MAX_DUMP) | |
2200 | nidump = MAX_DUMP; | |
2201 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
2202 | last_cmd = "di\n"; | |
f312deb4 VS |
2203 | } else if (c == 'l') { |
2204 | dump_log_buf(); | |
7e5b5938 OH |
2205 | } else if (c == 'r') { |
2206 | scanhex(&ndump); | |
2207 | if (ndump == 0) | |
2208 | ndump = 64; | |
2209 | xmon_rawdump(adrs, ndump); | |
2210 | adrs += ndump; | |
2211 | last_cmd = "dr\n"; | |
1da177e4 LT |
2212 | } else { |
2213 | scanhex(&ndump); | |
2214 | if (ndump == 0) | |
2215 | ndump = 64; | |
2216 | else if (ndump > MAX_DUMP) | |
2217 | ndump = MAX_DUMP; | |
2218 | prdump(adrs, ndump); | |
2219 | adrs += ndump; | |
2220 | last_cmd = "d\n"; | |
2221 | } | |
2222 | } | |
2223 | ||
9f1067c2 | 2224 | static void |
1da177e4 LT |
2225 | prdump(unsigned long adrs, long ndump) |
2226 | { | |
2227 | long n, m, c, r, nr; | |
2228 | unsigned char temp[16]; | |
2229 | ||
2230 | for (n = ndump; n > 0;) { | |
f78541dc | 2231 | printf(REG, adrs); |
1da177e4 LT |
2232 | putchar(' '); |
2233 | r = n < 16? n: 16; | |
2234 | nr = mread(adrs, temp, r); | |
2235 | adrs += nr; | |
2236 | for (m = 0; m < r; ++m) { | |
e3bc8049 | 2237 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
e1449ed9 | 2238 | putchar(' '); |
1da177e4 LT |
2239 | if (m < nr) |
2240 | printf("%.2x", temp[m]); | |
2241 | else | |
2242 | printf("%s", fault_chars[fault_type]); | |
2243 | } | |
e1449ed9 | 2244 | for (; m < 16; ++m) { |
e3bc8049 | 2245 | if ((m & (sizeof(long) - 1)) == 0) |
e1449ed9 | 2246 | putchar(' '); |
1da177e4 | 2247 | printf(" "); |
e1449ed9 | 2248 | } |
1da177e4 LT |
2249 | printf(" |"); |
2250 | for (m = 0; m < r; ++m) { | |
2251 | if (m < nr) { | |
2252 | c = temp[m]; | |
2253 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2254 | } else | |
2255 | putchar(' '); | |
2256 | } | |
2257 | n -= r; | |
2258 | for (; m < 16; ++m) | |
2259 | putchar(' '); | |
2260 | printf("|\n"); | |
2261 | if (nr < r) | |
2262 | break; | |
2263 | } | |
2264 | } | |
2265 | ||
4c4c8723 ME |
2266 | typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
2267 | ||
9f1067c2 | 2268 | static int |
4c4c8723 ME |
2269 | generic_inst_dump(unsigned long adr, long count, int praddr, |
2270 | instruction_dump_func dump_func) | |
1da177e4 LT |
2271 | { |
2272 | int nr, dotted; | |
2273 | unsigned long first_adr; | |
2274 | unsigned long inst, last_inst = 0; | |
2275 | unsigned char val[4]; | |
2276 | ||
2277 | dotted = 0; | |
2278 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2279 | nr = mread(adr, val, 4); | |
2280 | if (nr == 0) { | |
2281 | if (praddr) { | |
2282 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2283 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2284 | } |
2285 | break; | |
2286 | } | |
2287 | inst = GETWORD(val); | |
2288 | if (adr > first_adr && inst == last_inst) { | |
2289 | if (!dotted) { | |
2290 | printf(" ...\n"); | |
2291 | dotted = 1; | |
2292 | } | |
2293 | continue; | |
2294 | } | |
2295 | dotted = 0; | |
2296 | last_inst = inst; | |
2297 | if (praddr) | |
f78541dc | 2298 | printf(REG" %.8x", adr, inst); |
1da177e4 | 2299 | printf("\t"); |
4c4c8723 | 2300 | dump_func(inst, adr); |
1da177e4 LT |
2301 | printf("\n"); |
2302 | } | |
2303 | return adr - first_adr; | |
2304 | } | |
2305 | ||
9f1067c2 | 2306 | static int |
4c4c8723 ME |
2307 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
2308 | { | |
2309 | return generic_inst_dump(adr, count, praddr, print_insn_powerpc); | |
2310 | } | |
2311 | ||
1da177e4 LT |
2312 | void |
2313 | print_address(unsigned long addr) | |
2314 | { | |
2315 | xmon_print_symbol(addr, "\t# ", ""); | |
2316 | } | |
2317 | ||
f312deb4 VS |
2318 | void |
2319 | dump_log_buf(void) | |
2320 | { | |
ca5dd395 ME |
2321 | struct kmsg_dumper dumper = { .active = 1 }; |
2322 | unsigned char buf[128]; | |
2323 | size_t len; | |
f312deb4 | 2324 | |
e3bc8049 | 2325 | if (setjmp(bus_error_jmp) != 0) { |
ca5dd395 | 2326 | printf("Error dumping printk buffer!\n"); |
e3bc8049 ME |
2327 | return; |
2328 | } | |
f312deb4 | 2329 | |
e3bc8049 ME |
2330 | catch_memory_errors = 1; |
2331 | sync(); | |
f312deb4 | 2332 | |
ca5dd395 | 2333 | kmsg_dump_rewind_nolock(&dumper); |
0c23a88c | 2334 | xmon_start_pagination(); |
ca5dd395 ME |
2335 | while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) { |
2336 | buf[len] = '\0'; | |
2337 | printf("%s", buf); | |
2338 | } | |
0c23a88c | 2339 | xmon_end_pagination(); |
f312deb4 | 2340 | |
e3bc8049 ME |
2341 | sync(); |
2342 | /* wait a little while to see if we get a machine check */ | |
2343 | __delay(200); | |
2344 | catch_memory_errors = 0; | |
f312deb4 | 2345 | } |
1da177e4 LT |
2346 | |
2347 | /* | |
2348 | * Memory operations - move, set, print differences | |
2349 | */ | |
2350 | static unsigned long mdest; /* destination address */ | |
2351 | static unsigned long msrc; /* source address */ | |
2352 | static unsigned long mval; /* byte value to set memory to */ | |
2353 | static unsigned long mcount; /* # bytes to affect */ | |
2354 | static unsigned long mdiffs; /* max # differences to print */ | |
2355 | ||
9f1067c2 | 2356 | static void |
1da177e4 LT |
2357 | memops(int cmd) |
2358 | { | |
2359 | scanhex((void *)&mdest); | |
2360 | if( termch != '\n' ) | |
2361 | termch = 0; | |
2362 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2363 | if( termch != '\n' ) | |
2364 | termch = 0; | |
2365 | scanhex((void *)&mcount); | |
2366 | switch( cmd ){ | |
2367 | case 'm': | |
2368 | memmove((void *)mdest, (void *)msrc, mcount); | |
2369 | break; | |
2370 | case 's': | |
2371 | memset((void *)mdest, mval, mcount); | |
2372 | break; | |
2373 | case 'd': | |
2374 | if( termch != '\n' ) | |
2375 | termch = 0; | |
2376 | scanhex((void *)&mdiffs); | |
2377 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2378 | break; | |
2379 | } | |
2380 | } | |
2381 | ||
9f1067c2 | 2382 | static void |
1da177e4 LT |
2383 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
2384 | { | |
2385 | unsigned n, prt; | |
2386 | ||
2387 | prt = 0; | |
2388 | for( n = nb; n > 0; --n ) | |
2389 | if( *p1++ != *p2++ ) | |
2390 | if( ++prt <= maxpr ) | |
2391 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2392 | p1[-1], p2 - 1, p2[-1]); | |
2393 | if( prt > maxpr ) | |
2394 | printf("Total of %d differences\n", prt); | |
2395 | } | |
2396 | ||
2397 | static unsigned mend; | |
2398 | static unsigned mask; | |
2399 | ||
9f1067c2 | 2400 | static void |
1da177e4 LT |
2401 | memlocate(void) |
2402 | { | |
2403 | unsigned a, n; | |
2404 | unsigned char val[4]; | |
2405 | ||
2406 | last_cmd = "ml"; | |
2407 | scanhex((void *)&mdest); | |
2408 | if (termch != '\n') { | |
2409 | termch = 0; | |
2410 | scanhex((void *)&mend); | |
2411 | if (termch != '\n') { | |
2412 | termch = 0; | |
2413 | scanhex((void *)&mval); | |
2414 | mask = ~0; | |
2415 | if (termch != '\n') termch = 0; | |
2416 | scanhex((void *)&mask); | |
2417 | } | |
2418 | } | |
2419 | n = 0; | |
2420 | for (a = mdest; a < mend; a += 4) { | |
2421 | if (mread(a, val, 4) == 4 | |
2422 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2423 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2424 | if (++n >= 10) | |
2425 | break; | |
2426 | } | |
2427 | } | |
2428 | } | |
2429 | ||
2430 | static unsigned long mskip = 0x1000; | |
2431 | static unsigned long mlim = 0xffffffff; | |
2432 | ||
9f1067c2 | 2433 | static void |
1da177e4 LT |
2434 | memzcan(void) |
2435 | { | |
2436 | unsigned char v; | |
2437 | unsigned a; | |
2438 | int ok, ook; | |
2439 | ||
2440 | scanhex(&mdest); | |
2441 | if (termch != '\n') termch = 0; | |
2442 | scanhex(&mskip); | |
2443 | if (termch != '\n') termch = 0; | |
2444 | scanhex(&mlim); | |
2445 | ook = 0; | |
2446 | for (a = mdest; a < mlim; a += mskip) { | |
2447 | ok = mread(a, &v, 1); | |
2448 | if (ok && !ook) { | |
2449 | printf("%.8x .. ", a); | |
1da177e4 LT |
2450 | } else if (!ok && ook) |
2451 | printf("%.8x\n", a - mskip); | |
2452 | ook = ok; | |
2453 | if (a + mskip < a) | |
2454 | break; | |
2455 | } | |
2456 | if (ook) | |
2457 | printf("%.8x\n", a - mskip); | |
2458 | } | |
2459 | ||
9f1067c2 | 2460 | static void proccall(void) |
f78541dc PM |
2461 | { |
2462 | unsigned long args[8]; | |
2463 | unsigned long ret; | |
2464 | int i; | |
2465 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2466 | unsigned long, unsigned long, unsigned long, | |
2467 | unsigned long, unsigned long, unsigned long); | |
2468 | callfunc_t func; | |
2469 | ||
2470 | if (!scanhex(&adrs)) | |
2471 | return; | |
2472 | if (termch != '\n') | |
2473 | termch = 0; | |
2474 | for (i = 0; i < 8; ++i) | |
2475 | args[i] = 0; | |
2476 | for (i = 0; i < 8; ++i) { | |
2477 | if (!scanhex(&args[i]) || termch == '\n') | |
2478 | break; | |
2479 | termch = 0; | |
2480 | } | |
2481 | func = (callfunc_t) adrs; | |
2482 | ret = 0; | |
2483 | if (setjmp(bus_error_jmp) == 0) { | |
2484 | catch_memory_errors = 1; | |
2485 | sync(); | |
2486 | ret = func(args[0], args[1], args[2], args[3], | |
2487 | args[4], args[5], args[6], args[7]); | |
2488 | sync(); | |
736256e4 | 2489 | printf("return value is 0x%lx\n", ret); |
f78541dc PM |
2490 | } else { |
2491 | printf("*** %x exception occurred\n", fault_except); | |
2492 | } | |
2493 | catch_memory_errors = 0; | |
2494 | } | |
2495 | ||
1da177e4 LT |
2496 | /* Input scanning routines */ |
2497 | int | |
2498 | skipbl(void) | |
2499 | { | |
2500 | int c; | |
2501 | ||
2502 | if( termch != 0 ){ | |
2503 | c = termch; | |
2504 | termch = 0; | |
2505 | } else | |
2506 | c = inchar(); | |
2507 | while( c == ' ' || c == '\t' ) | |
2508 | c = inchar(); | |
2509 | return c; | |
2510 | } | |
2511 | ||
2512 | #define N_PTREGS 44 | |
2513 | static char *regnames[N_PTREGS] = { | |
2514 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2515 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2516 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2517 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2518 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2519 | #ifdef CONFIG_PPC64 | |
2520 | "softe", | |
2521 | #else | |
2522 | "mq", | |
2523 | #endif | |
1da177e4 LT |
2524 | "trap", "dar", "dsisr", "res" |
2525 | }; | |
2526 | ||
2527 | int | |
2528 | scanhex(unsigned long *vp) | |
2529 | { | |
2530 | int c, d; | |
2531 | unsigned long v; | |
2532 | ||
2533 | c = skipbl(); | |
2534 | if (c == '%') { | |
2535 | /* parse register name */ | |
2536 | char regname[8]; | |
2537 | int i; | |
2538 | ||
2539 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2540 | c = inchar(); | |
2541 | if (!isalnum(c)) { | |
2542 | termch = c; | |
2543 | break; | |
2544 | } | |
2545 | regname[i] = c; | |
2546 | } | |
2547 | regname[i] = 0; | |
2548 | for (i = 0; i < N_PTREGS; ++i) { | |
2549 | if (strcmp(regnames[i], regname) == 0) { | |
2550 | if (xmon_regs == NULL) { | |
2551 | printf("regs not available\n"); | |
2552 | return 0; | |
2553 | } | |
2554 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2555 | return 1; | |
2556 | } | |
2557 | } | |
2558 | printf("invalid register name '%%%s'\n", regname); | |
2559 | return 0; | |
2560 | } | |
2561 | ||
2562 | /* skip leading "0x" if any */ | |
2563 | ||
2564 | if (c == '0') { | |
2565 | c = inchar(); | |
2566 | if (c == 'x') { | |
2567 | c = inchar(); | |
2568 | } else { | |
2569 | d = hexdigit(c); | |
2570 | if (d == EOF) { | |
2571 | termch = c; | |
2572 | *vp = 0; | |
2573 | return 1; | |
2574 | } | |
2575 | } | |
2576 | } else if (c == '$') { | |
2577 | int i; | |
2578 | for (i=0; i<63; i++) { | |
2579 | c = inchar(); | |
05b981f4 | 2580 | if (isspace(c) || c == '\0') { |
1da177e4 LT |
2581 | termch = c; |
2582 | break; | |
2583 | } | |
2584 | tmpstr[i] = c; | |
2585 | } | |
2586 | tmpstr[i++] = 0; | |
6879dc13 BH |
2587 | *vp = 0; |
2588 | if (setjmp(bus_error_jmp) == 0) { | |
2589 | catch_memory_errors = 1; | |
2590 | sync(); | |
2591 | *vp = kallsyms_lookup_name(tmpstr); | |
2592 | sync(); | |
2593 | } | |
2594 | catch_memory_errors = 0; | |
1da177e4 LT |
2595 | if (!(*vp)) { |
2596 | printf("unknown symbol '%s'\n", tmpstr); | |
2597 | return 0; | |
2598 | } | |
2599 | return 1; | |
2600 | } | |
2601 | ||
2602 | d = hexdigit(c); | |
2603 | if (d == EOF) { | |
2604 | termch = c; | |
2605 | return 0; | |
2606 | } | |
2607 | v = 0; | |
2608 | do { | |
2609 | v = (v << 4) + d; | |
2610 | c = inchar(); | |
2611 | d = hexdigit(c); | |
2612 | } while (d != EOF); | |
2613 | termch = c; | |
2614 | *vp = v; | |
2615 | return 1; | |
2616 | } | |
2617 | ||
9f1067c2 | 2618 | static void |
1da177e4 LT |
2619 | scannl(void) |
2620 | { | |
2621 | int c; | |
2622 | ||
2623 | c = termch; | |
2624 | termch = 0; | |
2625 | while( c != '\n' ) | |
2626 | c = inchar(); | |
2627 | } | |
2628 | ||
9f1067c2 | 2629 | static int hexdigit(int c) |
1da177e4 LT |
2630 | { |
2631 | if( '0' <= c && c <= '9' ) | |
2632 | return c - '0'; | |
2633 | if( 'A' <= c && c <= 'F' ) | |
2634 | return c - ('A' - 10); | |
2635 | if( 'a' <= c && c <= 'f' ) | |
2636 | return c - ('a' - 10); | |
2637 | return EOF; | |
2638 | } | |
2639 | ||
2640 | void | |
2641 | getstring(char *s, int size) | |
2642 | { | |
2643 | int c; | |
2644 | ||
2645 | c = skipbl(); | |
2646 | do { | |
2647 | if( size > 1 ){ | |
2648 | *s++ = c; | |
2649 | --size; | |
2650 | } | |
2651 | c = inchar(); | |
2652 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2653 | termch = c; | |
2654 | *s = 0; | |
2655 | } | |
2656 | ||
2657 | static char line[256]; | |
2658 | static char *lineptr; | |
2659 | ||
9f1067c2 | 2660 | static void |
1da177e4 LT |
2661 | flush_input(void) |
2662 | { | |
2663 | lineptr = NULL; | |
2664 | } | |
2665 | ||
9f1067c2 | 2666 | static int |
1da177e4 LT |
2667 | inchar(void) |
2668 | { | |
2669 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2670 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2671 | lineptr = NULL; |
2672 | return EOF; | |
2673 | } | |
2674 | lineptr = line; | |
2675 | } | |
2676 | return *lineptr++; | |
2677 | } | |
2678 | ||
9f1067c2 | 2679 | static void |
1da177e4 LT |
2680 | take_input(char *str) |
2681 | { | |
2682 | lineptr = str; | |
2683 | } | |
2684 | ||
2685 | ||
2686 | static void | |
2687 | symbol_lookup(void) | |
2688 | { | |
2689 | int type = inchar(); | |
2690 | unsigned long addr; | |
2691 | static char tmp[64]; | |
2692 | ||
2693 | switch (type) { | |
2694 | case 'a': | |
2695 | if (scanhex(&addr)) | |
2696 | xmon_print_symbol(addr, ": ", "\n"); | |
2697 | termch = 0; | |
2698 | break; | |
2699 | case 's': | |
2700 | getstring(tmp, 64); | |
2701 | if (setjmp(bus_error_jmp) == 0) { | |
2702 | catch_memory_errors = 1; | |
2703 | sync(); | |
2704 | addr = kallsyms_lookup_name(tmp); | |
2705 | if (addr) | |
2706 | printf("%s: %lx\n", tmp, addr); | |
2707 | else | |
2708 | printf("Symbol '%s' not found.\n", tmp); | |
2709 | sync(); | |
2710 | } | |
2711 | catch_memory_errors = 0; | |
2712 | termch = 0; | |
2713 | break; | |
2714 | } | |
2715 | } | |
2716 | ||
2717 | ||
2718 | /* Print an address in numeric and symbolic form (if possible) */ | |
2719 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2720 | const char *after) | |
2721 | { | |
2722 | char *modname; | |
2723 | const char *name = NULL; | |
2724 | unsigned long offset, size; | |
2725 | ||
f78541dc | 2726 | printf(REG, address); |
1da177e4 LT |
2727 | if (setjmp(bus_error_jmp) == 0) { |
2728 | catch_memory_errors = 1; | |
2729 | sync(); | |
2730 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2731 | tmpstr); | |
2732 | sync(); | |
2733 | /* wait a little while to see if we get a machine check */ | |
2734 | __delay(200); | |
2735 | } | |
2736 | ||
2737 | catch_memory_errors = 0; | |
2738 | ||
2739 | if (name) { | |
2740 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2741 | if (modname) | |
2742 | printf(" [%s]", modname); | |
2743 | } | |
2744 | printf("%s", after); | |
2745 | } | |
2746 | ||
2d27cfd3 | 2747 | #ifdef CONFIG_PPC_BOOK3S_64 |
13b3d13b | 2748 | void dump_segments(void) |
1da177e4 LT |
2749 | { |
2750 | int i; | |
8218a303 | 2751 | unsigned long esid,vsid; |
b3b9595f | 2752 | unsigned long llp; |
1da177e4 | 2753 | |
736256e4 | 2754 | printf("SLB contents of cpu 0x%x\n", smp_processor_id()); |
1da177e4 | 2755 | |
584f8b71 | 2756 | for (i = 0; i < mmu_slb_size; i++) { |
b3b9595f | 2757 | asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
2758 | asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); | |
8218a303 | 2759 | if (esid || vsid) { |
b3b9595f | 2760 | printf("%02d %016lx %016lx", i, esid, vsid); |
8218a303 | 2761 | if (esid & SLB_ESID_V) { |
b3b9595f | 2762 | llp = vsid & SLB_VSID_LLP; |
2763 | if (vsid & SLB_VSID_B_1T) { | |
2764 | printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2765 | GET_ESID_1T(esid), | |
2766 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, | |
2767 | llp); | |
2768 | } else { | |
2769 | printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
2770 | GET_ESID(esid), | |
2771 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, | |
2772 | llp); | |
2773 | } | |
2774 | } else | |
2775 | printf("\n"); | |
2776 | } | |
1da177e4 LT |
2777 | } |
2778 | } | |
f78541dc PM |
2779 | #endif |
2780 | ||
2781 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2782 | void dump_segments(void) | |
2783 | { | |
2784 | int i; | |
2785 | ||
2786 | printf("sr0-15 ="); | |
2787 | for (i = 0; i < 16; ++i) | |
2788 | printf(" %x", mfsrin(i)); | |
2789 | printf("\n"); | |
2790 | } | |
2791 | #endif | |
2792 | ||
5a8a1a28 BH |
2793 | #ifdef CONFIG_44x |
2794 | static void dump_tlb_44x(void) | |
2795 | { | |
2796 | int i; | |
2797 | ||
2798 | for (i = 0; i < PPC44x_TLB_SIZE; i++) { | |
2799 | unsigned long w0,w1,w2; | |
2800 | asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); | |
2801 | asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); | |
2802 | asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); | |
2803 | printf("[%02x] %08x %08x %08x ", i, w0, w1, w2); | |
2804 | if (w0 & PPC44x_TLB_VALID) { | |
2805 | printf("V %08x -> %01x%08x %c%c%c%c%c", | |
2806 | w0 & PPC44x_TLB_EPN_MASK, | |
2807 | w1 & PPC44x_TLB_ERPN_MASK, | |
2808 | w1 & PPC44x_TLB_RPN_MASK, | |
2809 | (w2 & PPC44x_TLB_W) ? 'W' : 'w', | |
2810 | (w2 & PPC44x_TLB_I) ? 'I' : 'i', | |
2811 | (w2 & PPC44x_TLB_M) ? 'M' : 'm', | |
2812 | (w2 & PPC44x_TLB_G) ? 'G' : 'g', | |
2813 | (w2 & PPC44x_TLB_E) ? 'E' : 'e'); | |
2814 | } | |
2815 | printf("\n"); | |
2816 | } | |
2817 | } | |
2818 | #endif /* CONFIG_44x */ | |
9f1067c2 | 2819 | |
03247157 BH |
2820 | #ifdef CONFIG_PPC_BOOK3E |
2821 | static void dump_tlb_book3e(void) | |
2822 | { | |
2823 | u32 mmucfg, pidmask, lpidmask; | |
2824 | u64 ramask; | |
2825 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | |
2826 | int mmu_version; | |
2827 | static const char *pgsz_names[] = { | |
2828 | " 1K", | |
2829 | " 2K", | |
2830 | " 4K", | |
2831 | " 8K", | |
2832 | " 16K", | |
2833 | " 32K", | |
2834 | " 64K", | |
2835 | "128K", | |
2836 | "256K", | |
2837 | "512K", | |
2838 | " 1M", | |
2839 | " 2M", | |
2840 | " 4M", | |
2841 | " 8M", | |
2842 | " 16M", | |
2843 | " 32M", | |
2844 | " 64M", | |
2845 | "128M", | |
2846 | "256M", | |
2847 | "512M", | |
2848 | " 1G", | |
2849 | " 2G", | |
2850 | " 4G", | |
2851 | " 8G", | |
2852 | " 16G", | |
2853 | " 32G", | |
2854 | " 64G", | |
2855 | "128G", | |
2856 | "256G", | |
2857 | "512G", | |
2858 | " 1T", | |
2859 | " 2T", | |
2860 | }; | |
2861 | ||
2862 | /* Gather some infos about the MMU */ | |
2863 | mmucfg = mfspr(SPRN_MMUCFG); | |
2864 | mmu_version = (mmucfg & 3) + 1; | |
2865 | ntlbs = ((mmucfg >> 2) & 3) + 1; | |
2866 | pidsz = ((mmucfg >> 6) & 0x1f) + 1; | |
2867 | lpidsz = (mmucfg >> 24) & 0xf; | |
2868 | rasz = (mmucfg >> 16) & 0x7f; | |
2869 | if ((mmu_version > 1) && (mmucfg & 0x10000)) | |
2870 | lrat = 1; | |
2871 | printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", | |
2872 | mmu_version, ntlbs, pidsz, lpidsz, rasz); | |
2873 | pidmask = (1ul << pidsz) - 1; | |
2874 | lpidmask = (1ul << lpidsz) - 1; | |
2875 | ramask = (1ull << rasz) - 1; | |
2876 | ||
2877 | for (tlb = 0; tlb < ntlbs; tlb++) { | |
2878 | u32 tlbcfg; | |
2879 | int nent, assoc, new_cc = 1; | |
2880 | printf("TLB %d:\n------\n", tlb); | |
2881 | switch(tlb) { | |
2882 | case 0: | |
2883 | tlbcfg = mfspr(SPRN_TLB0CFG); | |
2884 | break; | |
2885 | case 1: | |
2886 | tlbcfg = mfspr(SPRN_TLB1CFG); | |
2887 | break; | |
2888 | case 2: | |
2889 | tlbcfg = mfspr(SPRN_TLB2CFG); | |
2890 | break; | |
2891 | case 3: | |
2892 | tlbcfg = mfspr(SPRN_TLB3CFG); | |
2893 | break; | |
2894 | default: | |
2895 | printf("Unsupported TLB number !\n"); | |
2896 | continue; | |
2897 | } | |
2898 | nent = tlbcfg & 0xfff; | |
2899 | assoc = (tlbcfg >> 24) & 0xff; | |
2900 | for (i = 0; i < nent; i++) { | |
2901 | u32 mas0 = MAS0_TLBSEL(tlb); | |
2902 | u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); | |
2903 | u64 mas2 = 0; | |
2904 | u64 mas7_mas3; | |
2905 | int esel = i, cc = i; | |
2906 | ||
2907 | if (assoc != 0) { | |
2908 | cc = i / assoc; | |
2909 | esel = i % assoc; | |
2910 | mas2 = cc * 0x1000; | |
2911 | } | |
2912 | ||
2913 | mas0 |= MAS0_ESEL(esel); | |
2914 | mtspr(SPRN_MAS0, mas0); | |
2915 | mtspr(SPRN_MAS1, mas1); | |
2916 | mtspr(SPRN_MAS2, mas2); | |
2917 | asm volatile("tlbre 0,0,0" : : : "memory"); | |
2918 | mas1 = mfspr(SPRN_MAS1); | |
2919 | mas2 = mfspr(SPRN_MAS2); | |
2920 | mas7_mas3 = mfspr(SPRN_MAS7_MAS3); | |
2921 | if (assoc && (i % assoc) == 0) | |
2922 | new_cc = 1; | |
2923 | if (!(mas1 & MAS1_VALID)) | |
2924 | continue; | |
2925 | if (assoc == 0) | |
2926 | printf("%04x- ", i); | |
2927 | else if (new_cc) | |
2928 | printf("%04x-%c", cc, 'A' + esel); | |
2929 | else | |
2930 | printf(" |%c", 'A' + esel); | |
2931 | new_cc = 0; | |
2932 | printf(" %016llx %04x %s %c%c AS%c", | |
2933 | mas2 & ~0x3ffull, | |
2934 | (mas1 >> 16) & 0x3fff, | |
2935 | pgsz_names[(mas1 >> 7) & 0x1f], | |
2936 | mas1 & MAS1_IND ? 'I' : ' ', | |
2937 | mas1 & MAS1_IPROT ? 'P' : ' ', | |
2938 | mas1 & MAS1_TS ? '1' : '0'); | |
2939 | printf(" %c%c%c%c%c%c%c", | |
2940 | mas2 & MAS2_X0 ? 'a' : ' ', | |
2941 | mas2 & MAS2_X1 ? 'v' : ' ', | |
2942 | mas2 & MAS2_W ? 'w' : ' ', | |
2943 | mas2 & MAS2_I ? 'i' : ' ', | |
2944 | mas2 & MAS2_M ? 'm' : ' ', | |
2945 | mas2 & MAS2_G ? 'g' : ' ', | |
2946 | mas2 & MAS2_E ? 'e' : ' '); | |
2947 | printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); | |
2948 | if (mas1 & MAS1_IND) | |
2949 | printf(" %s\n", | |
2950 | pgsz_names[(mas7_mas3 >> 1) & 0x1f]); | |
2951 | else | |
2952 | printf(" U%c%c%c S%c%c%c\n", | |
2953 | mas7_mas3 & MAS3_UX ? 'x' : ' ', | |
2954 | mas7_mas3 & MAS3_UW ? 'w' : ' ', | |
2955 | mas7_mas3 & MAS3_UR ? 'r' : ' ', | |
2956 | mas7_mas3 & MAS3_SX ? 'x' : ' ', | |
2957 | mas7_mas3 & MAS3_SW ? 'w' : ' ', | |
2958 | mas7_mas3 & MAS3_SR ? 'r' : ' '); | |
2959 | } | |
2960 | } | |
2961 | } | |
2962 | #endif /* CONFIG_PPC_BOOK3E */ | |
2963 | ||
9f1067c2 | 2964 | static void xmon_init(int enable) |
b13cfd17 OH |
2965 | { |
2966 | if (enable) { | |
2967 | __debugger = xmon; | |
2968 | __debugger_ipi = xmon_ipi; | |
2969 | __debugger_bpt = xmon_bpt; | |
2970 | __debugger_sstep = xmon_sstep; | |
2971 | __debugger_iabr_match = xmon_iabr_match; | |
9422de3e | 2972 | __debugger_break_match = xmon_break_match; |
b13cfd17 OH |
2973 | __debugger_fault_handler = xmon_fault_handler; |
2974 | } else { | |
2975 | __debugger = NULL; | |
2976 | __debugger_ipi = NULL; | |
2977 | __debugger_bpt = NULL; | |
2978 | __debugger_sstep = NULL; | |
2979 | __debugger_iabr_match = NULL; | |
9422de3e | 2980 | __debugger_break_match = NULL; |
b13cfd17 OH |
2981 | __debugger_fault_handler = NULL; |
2982 | } | |
1da177e4 | 2983 | } |
fca5dcd4 PM |
2984 | |
2985 | #ifdef CONFIG_MAGIC_SYSRQ | |
1495cc9d | 2986 | static void sysrq_handle_xmon(int key) |
fca5dcd4 PM |
2987 | { |
2988 | /* ensure xmon is enabled */ | |
2989 | xmon_init(1); | |
7d12e780 | 2990 | debugger(get_irq_regs()); |
fca5dcd4 PM |
2991 | } |
2992 | ||
1495cc9d | 2993 | static struct sysrq_key_op sysrq_xmon_op = { |
fca5dcd4 | 2994 | .handler = sysrq_handle_xmon, |
90a102e5 | 2995 | .help_msg = "xmon(x)", |
fca5dcd4 PM |
2996 | .action_msg = "Entering xmon", |
2997 | }; | |
2998 | ||
2999 | static int __init setup_xmon_sysrq(void) | |
3000 | { | |
3001 | register_sysrq_key('x', &sysrq_xmon_op); | |
3002 | return 0; | |
3003 | } | |
3004 | __initcall(setup_xmon_sysrq); | |
3005 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
47679283 | 3006 | |
f5e6a280 | 3007 | static int __initdata xmon_early, xmon_off; |
47679283 ME |
3008 | |
3009 | static int __init early_parse_xmon(char *p) | |
3010 | { | |
3011 | if (!p || strncmp(p, "early", 5) == 0) { | |
3012 | /* just "xmon" is equivalent to "xmon=early" */ | |
3013 | xmon_init(1); | |
3014 | xmon_early = 1; | |
3015 | } else if (strncmp(p, "on", 2) == 0) | |
3016 | xmon_init(1); | |
3017 | else if (strncmp(p, "off", 3) == 0) | |
3018 | xmon_off = 1; | |
3019 | else if (strncmp(p, "nobt", 4) == 0) | |
3020 | xmon_no_auto_backtrace = 1; | |
3021 | else | |
3022 | return 1; | |
3023 | ||
3024 | return 0; | |
3025 | } | |
3026 | early_param("xmon", early_parse_xmon); | |
3027 | ||
3028 | void __init xmon_setup(void) | |
3029 | { | |
3030 | #ifdef CONFIG_XMON_DEFAULT | |
3031 | if (!xmon_off) | |
3032 | xmon_init(1); | |
3033 | #endif | |
3034 | if (xmon_early) | |
3035 | debugger(NULL); | |
3036 | } | |
ff8a8f25 | 3037 | |
e055595d | 3038 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 ME |
3039 | |
3040 | struct spu_info { | |
3041 | struct spu *spu; | |
3042 | u64 saved_mfc_sr1_RW; | |
3043 | u32 saved_spu_runcntl_RW; | |
24a24c85 | 3044 | unsigned long dump_addr; |
ff8a8f25 ME |
3045 | u8 stopped_ok; |
3046 | }; | |
3047 | ||
3048 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ | |
3049 | ||
3050 | static struct spu_info spu_info[XMON_NUM_SPUS]; | |
3051 | ||
3052 | void xmon_register_spus(struct list_head *list) | |
3053 | { | |
3054 | struct spu *spu; | |
3055 | ||
3056 | list_for_each_entry(spu, list, full_list) { | |
3057 | if (spu->number >= XMON_NUM_SPUS) { | |
3058 | WARN_ON(1); | |
3059 | continue; | |
3060 | } | |
3061 | ||
3062 | spu_info[spu->number].spu = spu; | |
3063 | spu_info[spu->number].stopped_ok = 0; | |
24a24c85 ME |
3064 | spu_info[spu->number].dump_addr = (unsigned long) |
3065 | spu_info[spu->number].spu->local_store; | |
ff8a8f25 ME |
3066 | } |
3067 | } | |
3068 | ||
3069 | static void stop_spus(void) | |
3070 | { | |
3071 | struct spu *spu; | |
3072 | int i; | |
3073 | u64 tmp; | |
3074 | ||
3075 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3076 | if (!spu_info[i].spu) | |
3077 | continue; | |
3078 | ||
3079 | if (setjmp(bus_error_jmp) == 0) { | |
3080 | catch_memory_errors = 1; | |
3081 | sync(); | |
3082 | ||
3083 | spu = spu_info[i].spu; | |
3084 | ||
3085 | spu_info[i].saved_spu_runcntl_RW = | |
3086 | in_be32(&spu->problem->spu_runcntl_RW); | |
3087 | ||
3088 | tmp = spu_mfc_sr1_get(spu); | |
3089 | spu_info[i].saved_mfc_sr1_RW = tmp; | |
3090 | ||
3091 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; | |
3092 | spu_mfc_sr1_set(spu, tmp); | |
3093 | ||
3094 | sync(); | |
3095 | __delay(200); | |
3096 | ||
3097 | spu_info[i].stopped_ok = 1; | |
2a14442b ME |
3098 | |
3099 | printf("Stopped spu %.2d (was %s)\n", i, | |
3100 | spu_info[i].saved_spu_runcntl_RW ? | |
3101 | "running" : "stopped"); | |
ff8a8f25 ME |
3102 | } else { |
3103 | catch_memory_errors = 0; | |
3104 | printf("*** Error stopping spu %.2d\n", i); | |
3105 | } | |
3106 | catch_memory_errors = 0; | |
3107 | } | |
3108 | } | |
3109 | ||
3110 | static void restart_spus(void) | |
3111 | { | |
3112 | struct spu *spu; | |
3113 | int i; | |
3114 | ||
3115 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3116 | if (!spu_info[i].spu) | |
3117 | continue; | |
3118 | ||
3119 | if (!spu_info[i].stopped_ok) { | |
3120 | printf("*** Error, spu %d was not successfully stopped" | |
3121 | ", not restarting\n", i); | |
3122 | continue; | |
3123 | } | |
3124 | ||
3125 | if (setjmp(bus_error_jmp) == 0) { | |
3126 | catch_memory_errors = 1; | |
3127 | sync(); | |
3128 | ||
3129 | spu = spu_info[i].spu; | |
3130 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); | |
3131 | out_be32(&spu->problem->spu_runcntl_RW, | |
3132 | spu_info[i].saved_spu_runcntl_RW); | |
3133 | ||
3134 | sync(); | |
3135 | __delay(200); | |
3136 | ||
3137 | printf("Restarted spu %.2d\n", i); | |
3138 | } else { | |
3139 | catch_memory_errors = 0; | |
3140 | printf("*** Error restarting spu %.2d\n", i); | |
3141 | } | |
3142 | catch_memory_errors = 0; | |
3143 | } | |
3144 | } | |
3145 | ||
a8984970 | 3146 | #define DUMP_WIDTH 23 |
437a0706 | 3147 | #define DUMP_VALUE(format, field, value) \ |
a8984970 ME |
3148 | do { \ |
3149 | if (setjmp(bus_error_jmp) == 0) { \ | |
3150 | catch_memory_errors = 1; \ | |
3151 | sync(); \ | |
3152 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ | |
437a0706 | 3153 | #field, value); \ |
a8984970 ME |
3154 | sync(); \ |
3155 | __delay(200); \ | |
3156 | } else { \ | |
3157 | catch_memory_errors = 0; \ | |
3158 | printf(" %-*s = *** Error reading field.\n", \ | |
3159 | DUMP_WIDTH, #field); \ | |
3160 | } \ | |
3161 | catch_memory_errors = 0; \ | |
3162 | } while (0) | |
3163 | ||
437a0706 ME |
3164 | #define DUMP_FIELD(obj, format, field) \ |
3165 | DUMP_VALUE(format, field, obj->field) | |
3166 | ||
a8984970 ME |
3167 | static void dump_spu_fields(struct spu *spu) |
3168 | { | |
3169 | printf("Dumping spu fields at address %p:\n", spu); | |
3170 | ||
3171 | DUMP_FIELD(spu, "0x%x", number); | |
3172 | DUMP_FIELD(spu, "%s", name); | |
a8984970 ME |
3173 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
3174 | DUMP_FIELD(spu, "0x%p", local_store); | |
3175 | DUMP_FIELD(spu, "0x%lx", ls_size); | |
3176 | DUMP_FIELD(spu, "0x%x", node); | |
3177 | DUMP_FIELD(spu, "0x%lx", flags); | |
a8984970 | 3178 | DUMP_FIELD(spu, "%d", class_0_pending); |
f3d69e05 | 3179 | DUMP_FIELD(spu, "0x%lx", class_0_dar); |
f3d69e05 LB |
3180 | DUMP_FIELD(spu, "0x%lx", class_1_dar); |
3181 | DUMP_FIELD(spu, "0x%lx", class_1_dsisr); | |
a8984970 ME |
3182 | DUMP_FIELD(spu, "0x%lx", irqs[0]); |
3183 | DUMP_FIELD(spu, "0x%lx", irqs[1]); | |
3184 | DUMP_FIELD(spu, "0x%lx", irqs[2]); | |
3185 | DUMP_FIELD(spu, "0x%x", slb_replace); | |
3186 | DUMP_FIELD(spu, "%d", pid); | |
a8984970 ME |
3187 | DUMP_FIELD(spu, "0x%p", mm); |
3188 | DUMP_FIELD(spu, "0x%p", ctx); | |
3189 | DUMP_FIELD(spu, "0x%p", rq); | |
3190 | DUMP_FIELD(spu, "0x%p", timestamp); | |
3191 | DUMP_FIELD(spu, "0x%lx", problem_phys); | |
3192 | DUMP_FIELD(spu, "0x%p", problem); | |
437a0706 ME |
3193 | DUMP_VALUE("0x%x", problem->spu_runcntl_RW, |
3194 | in_be32(&spu->problem->spu_runcntl_RW)); | |
3195 | DUMP_VALUE("0x%x", problem->spu_status_R, | |
3196 | in_be32(&spu->problem->spu_status_R)); | |
3197 | DUMP_VALUE("0x%x", problem->spu_npc_RW, | |
3198 | in_be32(&spu->problem->spu_npc_RW)); | |
a8984970 | 3199 | DUMP_FIELD(spu, "0x%p", priv2); |
a985239b | 3200 | DUMP_FIELD(spu, "0x%p", pdata); |
a8984970 ME |
3201 | } |
3202 | ||
af89fb80 ME |
3203 | int |
3204 | spu_inst_dump(unsigned long adr, long count, int praddr) | |
3205 | { | |
3206 | return generic_inst_dump(adr, count, praddr, print_insn_spu); | |
3207 | } | |
3208 | ||
3209 | static void dump_spu_ls(unsigned long num, int subcmd) | |
24a24c85 ME |
3210 | { |
3211 | unsigned long offset, addr, ls_addr; | |
3212 | ||
3213 | if (setjmp(bus_error_jmp) == 0) { | |
3214 | catch_memory_errors = 1; | |
3215 | sync(); | |
3216 | ls_addr = (unsigned long)spu_info[num].spu->local_store; | |
3217 | sync(); | |
3218 | __delay(200); | |
3219 | } else { | |
3220 | catch_memory_errors = 0; | |
3221 | printf("*** Error: accessing spu info for spu %d\n", num); | |
3222 | return; | |
3223 | } | |
3224 | catch_memory_errors = 0; | |
3225 | ||
3226 | if (scanhex(&offset)) | |
3227 | addr = ls_addr + offset; | |
3228 | else | |
3229 | addr = spu_info[num].dump_addr; | |
3230 | ||
3231 | if (addr >= ls_addr + LS_SIZE) { | |
3232 | printf("*** Error: address outside of local store\n"); | |
3233 | return; | |
3234 | } | |
3235 | ||
af89fb80 ME |
3236 | switch (subcmd) { |
3237 | case 'i': | |
3238 | addr += spu_inst_dump(addr, 16, 1); | |
3239 | last_cmd = "sdi\n"; | |
3240 | break; | |
3241 | default: | |
3242 | prdump(addr, 64); | |
3243 | addr += 64; | |
3244 | last_cmd = "sd\n"; | |
3245 | break; | |
3246 | } | |
24a24c85 ME |
3247 | |
3248 | spu_info[num].dump_addr = addr; | |
3249 | } | |
3250 | ||
ff8a8f25 ME |
3251 | static int do_spu_cmd(void) |
3252 | { | |
24a24c85 | 3253 | static unsigned long num = 0; |
af89fb80 | 3254 | int cmd, subcmd = 0; |
ff8a8f25 ME |
3255 | |
3256 | cmd = inchar(); | |
3257 | switch (cmd) { | |
3258 | case 's': | |
3259 | stop_spus(); | |
3260 | break; | |
3261 | case 'r': | |
3262 | restart_spus(); | |
3263 | break; | |
24a24c85 | 3264 | case 'd': |
af89fb80 ME |
3265 | subcmd = inchar(); |
3266 | if (isxdigit(subcmd) || subcmd == '\n') | |
3267 | termch = subcmd; | |
3268 | case 'f': | |
24a24c85 ME |
3269 | scanhex(&num); |
3270 | if (num >= XMON_NUM_SPUS || !spu_info[num].spu) { | |
a8984970 | 3271 | printf("*** Error: invalid spu number\n"); |
24a24c85 ME |
3272 | return 0; |
3273 | } | |
3274 | ||
3275 | switch (cmd) { | |
3276 | case 'f': | |
3277 | dump_spu_fields(spu_info[num].spu); | |
3278 | break; | |
3279 | default: | |
af89fb80 | 3280 | dump_spu_ls(num, subcmd); |
24a24c85 ME |
3281 | break; |
3282 | } | |
3283 | ||
a8984970 | 3284 | break; |
ff8a8f25 ME |
3285 | default: |
3286 | return -1; | |
3287 | } | |
3288 | ||
3289 | return 0; | |
3290 | } | |
e055595d | 3291 | #else /* ! CONFIG_SPU_BASE */ |
ff8a8f25 ME |
3292 | static int do_spu_cmd(void) |
3293 | { | |
3294 | return -1; | |
3295 | } | |
3296 | #endif |