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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 | */ | |
56144ec7 ME |
13 | |
14 | #include <linux/kernel.h> | |
1da177e4 LT |
15 | #include <linux/errno.h> |
16 | #include <linux/sched.h> | |
17 | #include <linux/smp.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/reboot.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/kallsyms.h> | |
ca5dd395 | 22 | #include <linux/kmsg_dump.h> |
1da177e4 | 23 | #include <linux/cpumask.h> |
4b16f8e2 | 24 | #include <linux/export.h> |
fca5dcd4 | 25 | #include <linux/sysrq.h> |
4694ca02 | 26 | #include <linux/interrupt.h> |
7d12e780 | 27 | #include <linux/irq.h> |
73c9ceab | 28 | #include <linux/bug.h> |
a71d64b4 | 29 | #include <linux/nmi.h> |
05b981f4 | 30 | #include <linux/ctype.h> |
1da177e4 LT |
31 | |
32 | #include <asm/ptrace.h> | |
33 | #include <asm/string.h> | |
34 | #include <asm/prom.h> | |
35 | #include <asm/machdep.h> | |
f78541dc | 36 | #include <asm/xmon.h> |
1da177e4 LT |
37 | #include <asm/processor.h> |
38 | #include <asm/pgtable.h> | |
39 | #include <asm/mmu.h> | |
40 | #include <asm/mmu_context.h> | |
1da177e4 LT |
41 | #include <asm/cputable.h> |
42 | #include <asm/rtas.h> | |
43 | #include <asm/sstep.h> | |
f583ffce | 44 | #include <asm/irq_regs.h> |
ff8a8f25 ME |
45 | #include <asm/spu.h> |
46 | #include <asm/spu_priv1.h> | |
c3b75bd7 | 47 | #include <asm/setjmp.h> |
322b4394 | 48 | #include <asm/reg.h> |
ae3a197e | 49 | #include <asm/debug.h> |
9422de3e | 50 | #include <asm/hw_breakpoint.h> |
f78541dc | 51 | |
fde93a0f AD |
52 | #include <asm/opal.h> |
53 | #include <asm/firmware.h> | |
54 | ||
f78541dc | 55 | #ifdef CONFIG_PPC64 |
1da177e4 | 56 | #include <asm/hvcall.h> |
f78541dc PM |
57 | #include <asm/paca.h> |
58 | #endif | |
1da177e4 | 59 | |
1ad7d705 AK |
60 | #if defined(CONFIG_PPC_SPLPAR) |
61 | #include <asm/plpar_wrappers.h> | |
62 | #else | |
63 | static inline long plapr_set_ciabr(unsigned long ciabr) {return 0; }; | |
64 | #endif | |
65 | ||
1da177e4 | 66 | #include "nonstdio.h" |
e0426047 | 67 | #include "dis-asm.h" |
1da177e4 | 68 | |
1da177e4 | 69 | #ifdef CONFIG_SMP |
1c8950ff | 70 | static cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
1da177e4 LT |
71 | static unsigned long xmon_taken = 1; |
72 | static int xmon_owner; | |
73 | static int xmon_gate; | |
ddadb6b8 ME |
74 | #else |
75 | #define xmon_owner 0 | |
1da177e4 LT |
76 | #endif /* CONFIG_SMP */ |
77 | ||
5be3492f | 78 | static unsigned long in_xmon __read_mostly = 0; |
1da177e4 LT |
79 | |
80 | static unsigned long adrs; | |
81 | static int size = 1; | |
82 | #define MAX_DUMP (128 * 1024) | |
83 | static unsigned long ndump = 64; | |
84 | static unsigned long nidump = 16; | |
85 | static unsigned long ncsum = 4096; | |
86 | static int termch; | |
87 | static char tmpstr[128]; | |
88 | ||
1da177e4 LT |
89 | static long bus_error_jmp[JMP_BUF_LEN]; |
90 | static int catch_memory_errors; | |
31cdd0c3 | 91 | static int catch_spr_faults; |
1da177e4 | 92 | static long *xmon_fault_jmp[NR_CPUS]; |
1da177e4 LT |
93 | |
94 | /* Breakpoint stuff */ | |
95 | struct bpt { | |
96 | unsigned long address; | |
97 | unsigned int instr[2]; | |
98 | atomic_t ref_count; | |
99 | int enabled; | |
100 | unsigned long pad; | |
101 | }; | |
102 | ||
103 | /* Bits in bpt.enabled */ | |
abb90ee7 ME |
104 | #define BP_CIABR 1 |
105 | #define BP_TRAP 2 | |
106 | #define BP_DABR 4 | |
1da177e4 LT |
107 | |
108 | #define NBPTS 256 | |
109 | static struct bpt bpts[NBPTS]; | |
110 | static struct bpt dabr; | |
111 | static struct bpt *iabr; | |
112 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
113 | ||
114 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
115 | ||
116 | /* Prototypes */ | |
117 | static int cmds(struct pt_regs *); | |
118 | static int mread(unsigned long, void *, int); | |
119 | static int mwrite(unsigned long, void *, int); | |
120 | static int handle_fault(struct pt_regs *); | |
121 | static void byterev(unsigned char *, int); | |
122 | static void memex(void); | |
123 | static int bsesc(void); | |
124 | static void dump(void); | |
125 | static void prdump(unsigned long, long); | |
126 | static int ppc_inst_dump(unsigned long, long, int); | |
f312deb4 | 127 | static void dump_log_buf(void); |
fde93a0f AD |
128 | |
129 | #ifdef CONFIG_PPC_POWERNV | |
130 | static void dump_opal_msglog(void); | |
131 | #else | |
132 | static inline void dump_opal_msglog(void) | |
133 | { | |
134 | printf("Machine is not running OPAL firmware.\n"); | |
135 | } | |
136 | #endif | |
137 | ||
1da177e4 LT |
138 | static void backtrace(struct pt_regs *); |
139 | static void excprint(struct pt_regs *); | |
140 | static void prregs(struct pt_regs *); | |
141 | static void memops(int); | |
142 | static void memlocate(void); | |
143 | static void memzcan(void); | |
144 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
145 | int skipbl(void); | |
146 | int scanhex(unsigned long *valp); | |
147 | static void scannl(void); | |
148 | static int hexdigit(int); | |
149 | void getstring(char *, int); | |
150 | static void flush_input(void); | |
151 | static int inchar(void); | |
152 | static void take_input(char *); | |
31cdd0c3 | 153 | static int read_spr(int, unsigned long *); |
1da177e4 LT |
154 | static void write_spr(int, unsigned long); |
155 | static void super_regs(void); | |
156 | static void remove_bpts(void); | |
157 | static void insert_bpts(void); | |
158 | static void remove_cpu_bpts(void); | |
159 | static void insert_cpu_bpts(void); | |
160 | static struct bpt *at_breakpoint(unsigned long pc); | |
161 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
162 | static int do_step(struct pt_regs *); | |
163 | static void bpt_cmds(void); | |
164 | static void cacheflush(void); | |
165 | static int cpu_cmd(void); | |
166 | static void csum(void); | |
167 | static void bootcmds(void); | |
f78541dc | 168 | static void proccall(void); |
6dfb5404 | 169 | static void show_tasks(void); |
1da177e4 LT |
170 | void dump_segments(void); |
171 | static void symbol_lookup(void); | |
26c8af5f OH |
172 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
173 | unsigned long pc); | |
1da177e4 LT |
174 | static void xmon_print_symbol(unsigned long address, const char *mid, |
175 | const char *after); | |
176 | static const char *getvecname(unsigned long vec); | |
177 | ||
ff8a8f25 ME |
178 | static int do_spu_cmd(void); |
179 | ||
5a8a1a28 BH |
180 | #ifdef CONFIG_44x |
181 | static void dump_tlb_44x(void); | |
182 | #endif | |
03247157 BH |
183 | #ifdef CONFIG_PPC_BOOK3E |
184 | static void dump_tlb_book3e(void); | |
185 | #endif | |
5a8a1a28 | 186 | |
9f1067c2 | 187 | static int xmon_no_auto_backtrace; |
26c8af5f | 188 | |
f78541dc PM |
189 | #ifdef CONFIG_PPC64 |
190 | #define REG "%.16lx" | |
f78541dc PM |
191 | #else |
192 | #define REG "%.8lx" | |
f78541dc | 193 | #endif |
1da177e4 | 194 | |
72eceef6 PB |
195 | #ifdef __LITTLE_ENDIAN__ |
196 | #define GETWORD(v) (((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0]) | |
197 | #else | |
1da177e4 | 198 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) |
72eceef6 | 199 | #endif |
1da177e4 | 200 | |
1da177e4 LT |
201 | static char *help_string = "\ |
202 | Commands:\n\ | |
203 | b show breakpoints\n\ | |
204 | bd set data breakpoint\n\ | |
205 | bi set instruction breakpoint\n\ | |
206 | bc clear breakpoint\n" | |
207 | #ifdef CONFIG_SMP | |
208 | "\ | |
209 | c print cpus stopped in xmon\n\ | |
210 | c# try to switch to cpu number h (in hex)\n" | |
211 | #endif | |
212 | "\ | |
213 | C checksum\n\ | |
214 | d dump bytes\n\ | |
215 | di dump instructions\n\ | |
216 | df dump float values\n\ | |
217 | dd dump double values\n\ | |
ddadb6b8 | 218 | dl dump the kernel log buffer\n" |
fde93a0f AD |
219 | #ifdef CONFIG_PPC_POWERNV |
220 | "\ | |
221 | do dump the OPAL message log\n" | |
222 | #endif | |
ddadb6b8 ME |
223 | #ifdef CONFIG_PPC64 |
224 | "\ | |
225 | dp[#] dump paca for current cpu, or cpu #\n\ | |
226 | dpa dump paca for all possible cpus\n" | |
227 | #endif | |
228 | "\ | |
7e5b5938 | 229 | dr dump stream of raw bytes\n\ |
56144ec7 | 230 | dt dump the tracing buffers (uses printk)\n\ |
1da177e4 LT |
231 | e print exception information\n\ |
232 | f flush cache\n\ | |
233 | la lookup symbol+offset of specified address\n\ | |
234 | ls lookup address of specified symbol\n\ | |
235 | m examine/change memory\n\ | |
236 | mm move a block of memory\n\ | |
237 | ms set a block of memory\n\ | |
238 | md compare two blocks of memory\n\ | |
239 | ml locate a block of memory\n\ | |
240 | mz zero a block of memory\n\ | |
241 | mi show information about memory allocation\n\ | |
f78541dc | 242 | p call a procedure\n\ |
6dfb5404 | 243 | P list processes/tasks\n\ |
1da177e4 | 244 | r print registers\n\ |
ff8a8f25 | 245 | s single step\n" |
e055595d | 246 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 | 247 | " ss stop execution on all spus\n\ |
a8984970 | 248 | sr restore execution on stopped spus\n\ |
24a24c85 | 249 | sf # dump spu fields for spu # (in hex)\n\ |
c99176a2 | 250 | sd # dump spu local store for spu # (in hex)\n\ |
af89fb80 | 251 | sdi # disassemble spu local store for spu # (in hex)\n" |
ff8a8f25 ME |
252 | #endif |
253 | " S print special registers\n\ | |
31cdd0c3 PM |
254 | Sa print all SPRs\n\ |
255 | Sr # read SPR #\n\ | |
256 | Sw #v write v to SPR #\n\ | |
1da177e4 | 257 | t print backtrace\n\ |
1da177e4 | 258 | x exit monitor and recover\n\ |
2e340579 | 259 | X exit monitor and don't recover\n" |
79873e8d | 260 | #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) |
f78541dc | 261 | " u dump segment table or SLB\n" |
79873e8d | 262 | #elif defined(CONFIG_PPC_STD_MMU_32) |
f78541dc | 263 | " u dump segment registers\n" |
79873e8d | 264 | #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) |
5a8a1a28 BH |
265 | " u dump TLB\n" |
266 | #endif | |
f78541dc | 267 | " ? help\n" |
0c23a88c | 268 | " # n limit output to n lines per page (for dp, dpa, dl)\n" |
f78541dc | 269 | " zr reboot\n\ |
1da177e4 LT |
270 | zh halt\n" |
271 | ; | |
272 | ||
273 | static struct pt_regs *xmon_regs; | |
274 | ||
f78541dc | 275 | static inline void sync(void) |
1da177e4 LT |
276 | { |
277 | asm volatile("sync; isync"); | |
278 | } | |
279 | ||
f78541dc PM |
280 | static inline void store_inst(void *p) |
281 | { | |
282 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
283 | } | |
284 | ||
285 | static inline void cflush(void *p) | |
286 | { | |
287 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
288 | } | |
289 | ||
290 | static inline void cinval(void *p) | |
291 | { | |
292 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
293 | } | |
1da177e4 | 294 | |
1ad7d705 AK |
295 | /** |
296 | * write_ciabr() - write the CIABR SPR | |
297 | * @ciabr: The value to write. | |
298 | * | |
299 | * This function writes a value to the CIARB register either directly | |
300 | * through mtspr instruction if the kernel is in HV privilege mode or | |
301 | * call a hypervisor function to achieve the same in case the kernel | |
302 | * is in supervisor privilege mode. | |
303 | */ | |
304 | static void write_ciabr(unsigned long ciabr) | |
305 | { | |
306 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
307 | return; | |
308 | ||
309 | if (cpu_has_feature(CPU_FTR_HVMODE)) { | |
310 | mtspr(SPRN_CIABR, ciabr); | |
311 | return; | |
312 | } | |
313 | plapr_set_ciabr(ciabr); | |
314 | } | |
315 | ||
316 | /** | |
317 | * set_ciabr() - set the CIABR | |
318 | * @addr: The value to set. | |
319 | * | |
320 | * This function sets the correct privilege value into the the HW | |
321 | * breakpoint address before writing it up in the CIABR register. | |
322 | */ | |
323 | static void set_ciabr(unsigned long addr) | |
324 | { | |
325 | addr &= ~CIABR_PRIV; | |
326 | ||
327 | if (cpu_has_feature(CPU_FTR_HVMODE)) | |
328 | addr |= CIABR_PRIV_HYPER; | |
329 | else | |
330 | addr |= CIABR_PRIV_SUPER; | |
331 | write_ciabr(addr); | |
332 | } | |
333 | ||
1da177e4 LT |
334 | /* |
335 | * Disable surveillance (the service processor watchdog function) | |
336 | * while we are in xmon. | |
337 | * XXX we should re-enable it when we leave. :) | |
338 | */ | |
339 | #define SURVEILLANCE_TOKEN 9000 | |
340 | ||
341 | static inline void disable_surveillance(void) | |
342 | { | |
343 | #ifdef CONFIG_PPC_PSERIES | |
344 | /* Since this can't be a module, args should end up below 4GB. */ | |
345 | static struct rtas_args args; | |
08eb105a | 346 | int token; |
1da177e4 LT |
347 | |
348 | /* | |
349 | * At this point we have got all the cpus we can into | |
350 | * xmon, so there is hopefully no other cpu calling RTAS | |
351 | * at the moment, even though we don't take rtas.lock. | |
352 | * If we did try to take rtas.lock there would be a | |
353 | * real possibility of deadlock. | |
354 | */ | |
08eb105a ME |
355 | token = rtas_token("set-indicator"); |
356 | if (token == RTAS_UNKNOWN_SERVICE) | |
1da177e4 | 357 | return; |
08eb105a ME |
358 | |
359 | rtas_call_unlocked(&args, token, 3, 1, NULL, SURVEILLANCE_TOKEN, 0, 0); | |
360 | ||
1da177e4 LT |
361 | #endif /* CONFIG_PPC_PSERIES */ |
362 | } | |
363 | ||
364 | #ifdef CONFIG_SMP | |
365 | static int xmon_speaker; | |
366 | ||
367 | static void get_output_lock(void) | |
368 | { | |
369 | int me = smp_processor_id() + 0x100; | |
370 | int last_speaker = 0, prev; | |
371 | long timeout; | |
372 | ||
373 | if (xmon_speaker == me) | |
374 | return; | |
730efb61 | 375 | |
1da177e4 | 376 | for (;;) { |
730efb61 ME |
377 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
378 | if (last_speaker == 0) | |
379 | return; | |
380 | ||
15075897 ME |
381 | /* |
382 | * Wait a full second for the lock, we might be on a slow | |
383 | * console, but check every 100us. | |
384 | */ | |
385 | timeout = 10000; | |
1da177e4 | 386 | while (xmon_speaker == last_speaker) { |
15075897 ME |
387 | if (--timeout > 0) { |
388 | udelay(100); | |
1da177e4 | 389 | continue; |
15075897 ME |
390 | } |
391 | ||
1da177e4 LT |
392 | /* hostile takeover */ |
393 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
394 | if (prev == last_speaker) | |
395 | return; | |
396 | break; | |
397 | } | |
398 | } | |
399 | } | |
400 | ||
401 | static void release_output_lock(void) | |
402 | { | |
403 | xmon_speaker = 0; | |
404 | } | |
1c8950ff ME |
405 | |
406 | int cpus_are_in_xmon(void) | |
407 | { | |
104699c0 | 408 | return !cpumask_empty(&cpus_in_xmon); |
1c8950ff | 409 | } |
1da177e4 LT |
410 | #endif |
411 | ||
daf8f403 JB |
412 | static inline int unrecoverable_excp(struct pt_regs *regs) |
413 | { | |
08f6d6ab | 414 | #if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E) |
66857b3a | 415 | /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */ |
daf8f403 JB |
416 | return 0; |
417 | #else | |
418 | return ((regs->msr & MSR_RI) == 0); | |
419 | #endif | |
420 | } | |
421 | ||
b0da9856 | 422 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
423 | { |
424 | int cmd = 0; | |
1da177e4 LT |
425 | struct bpt *bp; |
426 | long recurse_jmp[JMP_BUF_LEN]; | |
427 | unsigned long offset; | |
f13659e0 | 428 | unsigned long flags; |
1da177e4 LT |
429 | #ifdef CONFIG_SMP |
430 | int cpu; | |
431 | int secondary; | |
432 | unsigned long timeout; | |
433 | #endif | |
434 | ||
f13659e0 | 435 | local_irq_save(flags); |
a71d64b4 | 436 | hard_irq_disable(); |
1da177e4 LT |
437 | |
438 | bp = in_breakpoint_table(regs->nip, &offset); | |
439 | if (bp != NULL) { | |
440 | regs->nip = bp->address + offset; | |
441 | atomic_dec(&bp->ref_count); | |
442 | } | |
443 | ||
444 | remove_cpu_bpts(); | |
445 | ||
446 | #ifdef CONFIG_SMP | |
447 | cpu = smp_processor_id(); | |
104699c0 | 448 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
31cdd0c3 PM |
449 | /* |
450 | * We catch SPR read/write faults here because the 0x700, 0xf60 | |
451 | * etc. handlers don't call debugger_fault_handler(). | |
452 | */ | |
453 | if (catch_spr_faults) | |
454 | longjmp(bus_error_jmp, 1); | |
1da177e4 LT |
455 | get_output_lock(); |
456 | excprint(regs); | |
457 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
458 | "returning to main loop\n", | |
459 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 460 | release_output_lock(); |
1da177e4 LT |
461 | longjmp(xmon_fault_jmp[cpu], 1); |
462 | } | |
463 | ||
464 | if (setjmp(recurse_jmp) != 0) { | |
465 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 466 | get_output_lock(); |
1da177e4 LT |
467 | printf("xmon: WARNING: bad recursive fault " |
468 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 469 | release_output_lock(); |
1da177e4 LT |
470 | goto waiting; |
471 | } | |
472 | secondary = !(xmon_taken && cpu == xmon_owner); | |
473 | goto cmdloop; | |
474 | } | |
475 | ||
476 | xmon_fault_jmp[cpu] = recurse_jmp; | |
1da177e4 LT |
477 | |
478 | bp = NULL; | |
9f0b0793 | 479 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
1da177e4 | 480 | bp = at_breakpoint(regs->nip); |
daf8f403 | 481 | if (bp || unrecoverable_excp(regs)) |
1da177e4 LT |
482 | fromipi = 0; |
483 | ||
484 | if (!fromipi) { | |
485 | get_output_lock(); | |
486 | excprint(regs); | |
487 | if (bp) { | |
736256e4 | 488 | printf("cpu 0x%x stopped at breakpoint 0x%lx (", |
1da177e4 LT |
489 | cpu, BP_NUM(bp)); |
490 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
491 | } | |
daf8f403 | 492 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
493 | printf("WARNING: exception is not recoverable, " |
494 | "can't continue\n"); | |
495 | release_output_lock(); | |
496 | } | |
497 | ||
d2b496e5 ME |
498 | cpumask_set_cpu(cpu, &cpus_in_xmon); |
499 | ||
1da177e4 LT |
500 | waiting: |
501 | secondary = 1; | |
502 | while (secondary && !xmon_gate) { | |
503 | if (in_xmon == 0) { | |
504 | if (fromipi) | |
505 | goto leave; | |
506 | secondary = test_and_set_bit(0, &in_xmon); | |
507 | } | |
508 | barrier(); | |
509 | } | |
510 | ||
511 | if (!secondary && !xmon_gate) { | |
512 | /* we are the first cpu to come in */ | |
513 | /* interrupt other cpu(s) */ | |
514 | int ncpus = num_online_cpus(); | |
515 | ||
516 | xmon_owner = cpu; | |
517 | mb(); | |
518 | if (ncpus > 1) { | |
e0476371 | 519 | smp_send_debugger_break(); |
1da177e4 LT |
520 | /* wait for other cpus to come in */ |
521 | for (timeout = 100000000; timeout != 0; --timeout) { | |
104699c0 | 522 | if (cpumask_weight(&cpus_in_xmon) >= ncpus) |
1da177e4 LT |
523 | break; |
524 | barrier(); | |
525 | } | |
526 | } | |
527 | remove_bpts(); | |
528 | disable_surveillance(); | |
529 | /* for breakpoint or single step, print the current instr. */ | |
530 | if (bp || TRAP(regs) == 0xd00) | |
531 | ppc_inst_dump(regs->nip, 1, 0); | |
532 | printf("enter ? for help\n"); | |
533 | mb(); | |
534 | xmon_gate = 1; | |
535 | barrier(); | |
536 | } | |
537 | ||
538 | cmdloop: | |
539 | while (in_xmon) { | |
540 | if (secondary) { | |
541 | if (cpu == xmon_owner) { | |
542 | if (!test_and_set_bit(0, &xmon_taken)) { | |
543 | secondary = 0; | |
544 | continue; | |
545 | } | |
546 | /* missed it */ | |
547 | while (cpu == xmon_owner) | |
548 | barrier(); | |
549 | } | |
550 | barrier(); | |
551 | } else { | |
552 | cmd = cmds(regs); | |
553 | if (cmd != 0) { | |
554 | /* exiting xmon */ | |
555 | insert_bpts(); | |
556 | xmon_gate = 0; | |
557 | wmb(); | |
558 | in_xmon = 0; | |
559 | break; | |
560 | } | |
561 | /* have switched to some other cpu */ | |
562 | secondary = 1; | |
563 | } | |
564 | } | |
565 | leave: | |
104699c0 | 566 | cpumask_clear_cpu(cpu, &cpus_in_xmon); |
1da177e4 | 567 | xmon_fault_jmp[cpu] = NULL; |
1da177e4 LT |
568 | #else |
569 | /* UP is simple... */ | |
570 | if (in_xmon) { | |
571 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
572 | regs->trap, getvecname(TRAP(regs))); | |
573 | longjmp(xmon_fault_jmp[0], 1); | |
574 | } | |
575 | if (setjmp(recurse_jmp) == 0) { | |
576 | xmon_fault_jmp[0] = recurse_jmp; | |
577 | in_xmon = 1; | |
578 | ||
579 | excprint(regs); | |
580 | bp = at_breakpoint(regs->nip); | |
581 | if (bp) { | |
736256e4 | 582 | printf("Stopped at breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
583 | xmon_print_symbol(regs->nip, " ", ")\n"); |
584 | } | |
daf8f403 | 585 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
586 | printf("WARNING: exception is not recoverable, " |
587 | "can't continue\n"); | |
588 | remove_bpts(); | |
589 | disable_surveillance(); | |
590 | /* for breakpoint or single step, print the current instr. */ | |
591 | if (bp || TRAP(regs) == 0xd00) | |
592 | ppc_inst_dump(regs->nip, 1, 0); | |
593 | printf("enter ? for help\n"); | |
594 | } | |
595 | ||
596 | cmd = cmds(regs); | |
597 | ||
598 | insert_bpts(); | |
599 | in_xmon = 0; | |
600 | #endif | |
601 | ||
cdd3904d JB |
602 | #ifdef CONFIG_BOOKE |
603 | if (regs->msr & MSR_DE) { | |
604 | bp = at_breakpoint(regs->nip); | |
605 | if (bp != NULL) { | |
606 | regs->nip = (unsigned long) &bp->instr[0]; | |
607 | atomic_inc(&bp->ref_count); | |
608 | } | |
609 | } | |
610 | #else | |
9f0b0793 | 611 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
612 | bp = at_breakpoint(regs->nip); |
613 | if (bp != NULL) { | |
614 | int stepped = emulate_step(regs, bp->instr[0]); | |
615 | if (stepped == 0) { | |
616 | regs->nip = (unsigned long) &bp->instr[0]; | |
617 | atomic_inc(&bp->ref_count); | |
618 | } else if (stepped < 0) { | |
619 | printf("Couldn't single-step %s instruction\n", | |
620 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
621 | } | |
622 | } | |
623 | } | |
cdd3904d | 624 | #endif |
1da177e4 LT |
625 | insert_cpu_bpts(); |
626 | ||
a71d64b4 | 627 | touch_nmi_watchdog(); |
f13659e0 | 628 | local_irq_restore(flags); |
1da177e4 | 629 | |
0a730ae5 | 630 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
631 | } |
632 | ||
633 | int xmon(struct pt_regs *excp) | |
634 | { | |
635 | struct pt_regs regs; | |
636 | ||
637 | if (excp == NULL) { | |
322b4394 | 638 | ppc_save_regs(®s); |
1da177e4 LT |
639 | excp = ®s; |
640 | } | |
ff8a8f25 | 641 | |
1da177e4 LT |
642 | return xmon_core(excp, 0); |
643 | } | |
f78541dc PM |
644 | EXPORT_SYMBOL(xmon); |
645 | ||
f583ffce | 646 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
647 | { |
648 | unsigned long flags; | |
649 | local_irq_save(flags); | |
650 | printf("Keyboard interrupt\n"); | |
f583ffce | 651 | xmon(get_irq_regs()); |
f78541dc PM |
652 | local_irq_restore(flags); |
653 | return IRQ_HANDLED; | |
654 | } | |
1da177e4 | 655 | |
b0da9856 | 656 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
657 | { |
658 | struct bpt *bp; | |
659 | unsigned long offset; | |
660 | ||
9f0b0793 | 661 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 LT |
662 | return 0; |
663 | ||
664 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
665 | bp = in_breakpoint_table(regs->nip, &offset); | |
666 | if (bp != NULL && offset == 4) { | |
667 | regs->nip = bp->address + 4; | |
668 | atomic_dec(&bp->ref_count); | |
669 | return 1; | |
670 | } | |
671 | ||
672 | /* Are we at a breakpoint? */ | |
673 | bp = at_breakpoint(regs->nip); | |
674 | if (!bp) | |
675 | return 0; | |
676 | ||
677 | xmon_core(regs, 0); | |
678 | ||
679 | return 1; | |
680 | } | |
681 | ||
b0da9856 | 682 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
683 | { |
684 | if (user_mode(regs)) | |
685 | return 0; | |
686 | xmon_core(regs, 0); | |
687 | return 1; | |
688 | } | |
689 | ||
9422de3e | 690 | static int xmon_break_match(struct pt_regs *regs) |
1da177e4 | 691 | { |
9f0b0793 | 692 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 693 | return 0; |
fd9648df AB |
694 | if (dabr.enabled == 0) |
695 | return 0; | |
1da177e4 LT |
696 | xmon_core(regs, 0); |
697 | return 1; | |
698 | } | |
699 | ||
b0da9856 | 700 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 | 701 | { |
9f0b0793 | 702 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 703 | return 0; |
9f1067c2 | 704 | if (iabr == NULL) |
1da177e4 LT |
705 | return 0; |
706 | xmon_core(regs, 0); | |
707 | return 1; | |
708 | } | |
709 | ||
b0da9856 | 710 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
711 | { |
712 | #ifdef CONFIG_SMP | |
104699c0 | 713 | if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
1da177e4 LT |
714 | xmon_core(regs, 1); |
715 | #endif | |
716 | return 0; | |
717 | } | |
718 | ||
b0da9856 | 719 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
720 | { |
721 | struct bpt *bp; | |
722 | unsigned long offset; | |
723 | ||
724 | if (in_xmon && catch_memory_errors) | |
725 | handle_fault(regs); /* doesn't return */ | |
726 | ||
9f0b0793 | 727 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
728 | bp = in_breakpoint_table(regs->nip, &offset); |
729 | if (bp != NULL) { | |
730 | regs->nip = bp->address + offset; | |
731 | atomic_dec(&bp->ref_count); | |
732 | } | |
733 | } | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
1da177e4 LT |
738 | static struct bpt *at_breakpoint(unsigned long pc) |
739 | { | |
740 | int i; | |
741 | struct bpt *bp; | |
742 | ||
743 | bp = bpts; | |
744 | for (i = 0; i < NBPTS; ++i, ++bp) | |
745 | if (bp->enabled && pc == bp->address) | |
746 | return bp; | |
747 | return NULL; | |
748 | } | |
749 | ||
750 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
751 | { | |
752 | unsigned long off; | |
753 | ||
754 | off = nip - (unsigned long) bpts; | |
755 | if (off >= sizeof(bpts)) | |
756 | return NULL; | |
757 | off %= sizeof(struct bpt); | |
758 | if (off != offsetof(struct bpt, instr[0]) | |
759 | && off != offsetof(struct bpt, instr[1])) | |
760 | return NULL; | |
761 | *offp = off - offsetof(struct bpt, instr[0]); | |
762 | return (struct bpt *) (nip - off); | |
763 | } | |
764 | ||
765 | static struct bpt *new_breakpoint(unsigned long a) | |
766 | { | |
767 | struct bpt *bp; | |
768 | ||
769 | a &= ~3UL; | |
770 | bp = at_breakpoint(a); | |
771 | if (bp) | |
772 | return bp; | |
773 | ||
774 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
775 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
776 | bp->address = a; | |
777 | bp->instr[1] = bpinstr; | |
778 | store_inst(&bp->instr[1]); | |
779 | return bp; | |
780 | } | |
781 | } | |
782 | ||
783 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
784 | return NULL; | |
785 | } | |
786 | ||
787 | static void insert_bpts(void) | |
788 | { | |
789 | int i; | |
790 | struct bpt *bp; | |
791 | ||
792 | bp = bpts; | |
793 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 794 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0) |
1da177e4 LT |
795 | continue; |
796 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
797 | printf("Couldn't read instruction at %lx, " | |
798 | "disabling breakpoint there\n", bp->address); | |
799 | bp->enabled = 0; | |
800 | continue; | |
801 | } | |
802 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
803 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
804 | "instruction, disabling it\n", bp->address); | |
805 | bp->enabled = 0; | |
806 | continue; | |
807 | } | |
808 | store_inst(&bp->instr[0]); | |
abb90ee7 | 809 | if (bp->enabled & BP_CIABR) |
1da177e4 LT |
810 | continue; |
811 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
812 | printf("Couldn't write instruction at %lx, " | |
813 | "disabling breakpoint there\n", bp->address); | |
814 | bp->enabled &= ~BP_TRAP; | |
815 | continue; | |
816 | } | |
817 | store_inst((void *)bp->address); | |
818 | } | |
819 | } | |
820 | ||
821 | static void insert_cpu_bpts(void) | |
822 | { | |
9422de3e MN |
823 | struct arch_hw_breakpoint brk; |
824 | ||
825 | if (dabr.enabled) { | |
826 | brk.address = dabr.address; | |
827 | brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL; | |
828 | brk.len = 8; | |
21f58507 | 829 | __set_breakpoint(&brk); |
9422de3e | 830 | } |
1ad7d705 AK |
831 | |
832 | if (iabr) | |
833 | set_ciabr(iabr->address); | |
1da177e4 LT |
834 | } |
835 | ||
836 | static void remove_bpts(void) | |
837 | { | |
838 | int i; | |
839 | struct bpt *bp; | |
840 | unsigned instr; | |
841 | ||
842 | bp = bpts; | |
843 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 844 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) != BP_TRAP) |
1da177e4 LT |
845 | continue; |
846 | if (mread(bp->address, &instr, 4) == 4 | |
847 | && instr == bpinstr | |
848 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
849 | printf("Couldn't remove breakpoint at %lx\n", | |
850 | bp->address); | |
851 | else | |
852 | store_inst((void *)bp->address); | |
853 | } | |
854 | } | |
855 | ||
856 | static void remove_cpu_bpts(void) | |
857 | { | |
9422de3e | 858 | hw_breakpoint_disable(); |
1ad7d705 | 859 | write_ciabr(0); |
1da177e4 LT |
860 | } |
861 | ||
958b7c80 S |
862 | static void set_lpp_cmd(void) |
863 | { | |
864 | unsigned long lpp; | |
865 | ||
866 | if (!scanhex(&lpp)) { | |
867 | printf("Invalid number.\n"); | |
868 | lpp = 0; | |
869 | } | |
870 | xmon_set_pagination_lpp(lpp); | |
871 | } | |
1da177e4 LT |
872 | /* Command interpreting routine */ |
873 | static char *last_cmd; | |
874 | ||
875 | static int | |
876 | cmds(struct pt_regs *excp) | |
877 | { | |
878 | int cmd = 0; | |
879 | ||
880 | last_cmd = NULL; | |
881 | xmon_regs = excp; | |
26c8af5f OH |
882 | |
883 | if (!xmon_no_auto_backtrace) { | |
884 | xmon_no_auto_backtrace = 1; | |
885 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
886 | } | |
887 | ||
1da177e4 LT |
888 | for(;;) { |
889 | #ifdef CONFIG_SMP | |
890 | printf("%x:", smp_processor_id()); | |
891 | #endif /* CONFIG_SMP */ | |
892 | printf("mon> "); | |
1da177e4 LT |
893 | flush_input(); |
894 | termch = 0; | |
895 | cmd = skipbl(); | |
896 | if( cmd == '\n' ) { | |
897 | if (last_cmd == NULL) | |
898 | continue; | |
899 | take_input(last_cmd); | |
900 | last_cmd = NULL; | |
901 | cmd = inchar(); | |
902 | } | |
903 | switch (cmd) { | |
904 | case 'm': | |
905 | cmd = inchar(); | |
906 | switch (cmd) { | |
907 | case 'm': | |
908 | case 's': | |
909 | case 'd': | |
910 | memops(cmd); | |
911 | break; | |
912 | case 'l': | |
913 | memlocate(); | |
914 | break; | |
915 | case 'z': | |
916 | memzcan(); | |
917 | break; | |
918 | case 'i': | |
b2b755b5 | 919 | show_mem(0); |
1da177e4 LT |
920 | break; |
921 | default: | |
922 | termch = cmd; | |
923 | memex(); | |
924 | } | |
925 | break; | |
926 | case 'd': | |
927 | dump(); | |
928 | break; | |
929 | case 'l': | |
930 | symbol_lookup(); | |
931 | break; | |
932 | case 'r': | |
933 | prregs(excp); /* print regs */ | |
934 | break; | |
935 | case 'e': | |
936 | excprint(excp); | |
937 | break; | |
938 | case 'S': | |
939 | super_regs(); | |
940 | break; | |
941 | case 't': | |
942 | backtrace(excp); | |
943 | break; | |
944 | case 'f': | |
945 | cacheflush(); | |
946 | break; | |
947 | case 's': | |
ff8a8f25 ME |
948 | if (do_spu_cmd() == 0) |
949 | break; | |
1da177e4 LT |
950 | if (do_step(excp)) |
951 | return cmd; | |
952 | break; | |
953 | case 'x': | |
954 | case 'X': | |
bb6b9b28 | 955 | return cmd; |
1da177e4 | 956 | case EOF: |
bb6b9b28 BH |
957 | printf(" <no input ...>\n"); |
958 | mdelay(2000); | |
1da177e4 LT |
959 | return cmd; |
960 | case '?': | |
4d404edc | 961 | xmon_puts(help_string); |
1da177e4 | 962 | break; |
958b7c80 S |
963 | case '#': |
964 | set_lpp_cmd(); | |
965 | break; | |
1da177e4 LT |
966 | case 'b': |
967 | bpt_cmds(); | |
968 | break; | |
969 | case 'C': | |
970 | csum(); | |
971 | break; | |
972 | case 'c': | |
973 | if (cpu_cmd()) | |
974 | return 0; | |
975 | break; | |
976 | case 'z': | |
977 | bootcmds(); | |
978 | break; | |
f78541dc PM |
979 | case 'p': |
980 | proccall(); | |
1da177e4 | 981 | break; |
6dfb5404 DM |
982 | case 'P': |
983 | show_tasks(); | |
984 | break; | |
f78541dc | 985 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
986 | case 'u': |
987 | dump_segments(); | |
988 | break; | |
d8ee6f34 | 989 | #elif defined(CONFIG_44x) |
5a8a1a28 BH |
990 | case 'u': |
991 | dump_tlb_44x(); | |
992 | break; | |
79873e8d | 993 | #elif defined(CONFIG_PPC_BOOK3E) |
03247157 BH |
994 | case 'u': |
995 | dump_tlb_book3e(); | |
996 | break; | |
f78541dc | 997 | #endif |
1da177e4 LT |
998 | default: |
999 | printf("Unrecognized command: "); | |
e3bc8049 | 1000 | do { |
1da177e4 LT |
1001 | if (' ' < cmd && cmd <= '~') |
1002 | putchar(cmd); | |
1003 | else | |
1004 | printf("\\x%x", cmd); | |
1005 | cmd = inchar(); | |
e3bc8049 | 1006 | } while (cmd != '\n'); |
1da177e4 LT |
1007 | printf(" (type ? for help)\n"); |
1008 | break; | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | ||
cdd3904d JB |
1013 | #ifdef CONFIG_BOOKE |
1014 | static int do_step(struct pt_regs *regs) | |
1015 | { | |
1016 | regs->msr |= MSR_DE; | |
1017 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
1018 | return 1; | |
1019 | } | |
1020 | #else | |
1da177e4 LT |
1021 | /* |
1022 | * Step a single instruction. | |
1023 | * Some instructions we emulate, others we execute with MSR_SE set. | |
1024 | */ | |
1025 | static int do_step(struct pt_regs *regs) | |
1026 | { | |
1027 | unsigned int instr; | |
1028 | int stepped; | |
1029 | ||
1030 | /* check we are in 64-bit kernel mode, translation enabled */ | |
9f0b0793 | 1031 | if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
1da177e4 LT |
1032 | if (mread(regs->nip, &instr, 4) == 4) { |
1033 | stepped = emulate_step(regs, instr); | |
1034 | if (stepped < 0) { | |
1035 | printf("Couldn't single-step %s instruction\n", | |
1036 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
1037 | return 0; | |
1038 | } | |
1039 | if (stepped > 0) { | |
1040 | regs->trap = 0xd00 | (regs->trap & 1); | |
1041 | printf("stepped to "); | |
1042 | xmon_print_symbol(regs->nip, " ", "\n"); | |
1043 | ppc_inst_dump(regs->nip, 1, 0); | |
1044 | return 0; | |
1045 | } | |
1046 | } | |
1047 | } | |
1048 | regs->msr |= MSR_SE; | |
1049 | return 1; | |
1050 | } | |
cdd3904d | 1051 | #endif |
1da177e4 LT |
1052 | |
1053 | static void bootcmds(void) | |
1054 | { | |
1055 | int cmd; | |
1056 | ||
1057 | cmd = inchar(); | |
1058 | if (cmd == 'r') | |
1059 | ppc_md.restart(NULL); | |
1060 | else if (cmd == 'h') | |
1061 | ppc_md.halt(); | |
1062 | else if (cmd == 'p') | |
9178ba29 AG |
1063 | if (pm_power_off) |
1064 | pm_power_off(); | |
1da177e4 LT |
1065 | } |
1066 | ||
1067 | static int cpu_cmd(void) | |
1068 | { | |
1069 | #ifdef CONFIG_SMP | |
fd3bb912 | 1070 | unsigned long cpu, first_cpu, last_cpu; |
1da177e4 | 1071 | int timeout; |
1da177e4 LT |
1072 | |
1073 | if (!scanhex(&cpu)) { | |
1074 | /* print cpus waiting or in xmon */ | |
1075 | printf("cpus stopped:"); | |
fd3bb912 | 1076 | last_cpu = first_cpu = NR_CPUS; |
bc1d7702 | 1077 | for_each_possible_cpu(cpu) { |
104699c0 | 1078 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
fd3bb912 PM |
1079 | if (cpu == last_cpu + 1) { |
1080 | last_cpu = cpu; | |
1081 | } else { | |
1082 | if (last_cpu != first_cpu) | |
736256e4 | 1083 | printf("-0x%lx", last_cpu); |
fd3bb912 | 1084 | last_cpu = first_cpu = cpu; |
736256e4 | 1085 | printf(" 0x%lx", cpu); |
fd3bb912 | 1086 | } |
1da177e4 LT |
1087 | } |
1088 | } | |
fd3bb912 | 1089 | if (last_cpu != first_cpu) |
736256e4 | 1090 | printf("-0x%lx", last_cpu); |
1da177e4 LT |
1091 | printf("\n"); |
1092 | return 0; | |
1093 | } | |
1094 | /* try to switch to cpu specified */ | |
104699c0 | 1095 | if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
1da177e4 LT |
1096 | printf("cpu 0x%x isn't in xmon\n", cpu); |
1097 | return 0; | |
1098 | } | |
1099 | xmon_taken = 0; | |
1100 | mb(); | |
1101 | xmon_owner = cpu; | |
1102 | timeout = 10000000; | |
1103 | while (!xmon_taken) { | |
1104 | if (--timeout == 0) { | |
1105 | if (test_and_set_bit(0, &xmon_taken)) | |
1106 | break; | |
1107 | /* take control back */ | |
1108 | mb(); | |
1109 | xmon_owner = smp_processor_id(); | |
736256e4 | 1110 | printf("cpu 0x%x didn't take control\n", cpu); |
1da177e4 LT |
1111 | return 0; |
1112 | } | |
1113 | barrier(); | |
1114 | } | |
1115 | return 1; | |
1116 | #else | |
1117 | return 0; | |
1118 | #endif /* CONFIG_SMP */ | |
1119 | } | |
1120 | ||
1121 | static unsigned short fcstab[256] = { | |
1122 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
1123 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
1124 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
1125 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
1126 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
1127 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
1128 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
1129 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
1130 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
1131 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
1132 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
1133 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
1134 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
1135 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
1136 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
1137 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
1138 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
1139 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
1140 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
1141 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
1142 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
1143 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1144 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1145 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1146 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1147 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1148 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1149 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1150 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1151 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1152 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1153 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1154 | }; | |
1155 | ||
1156 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1157 | ||
1158 | static void | |
1159 | csum(void) | |
1160 | { | |
1161 | unsigned int i; | |
1162 | unsigned short fcs; | |
1163 | unsigned char v; | |
1164 | ||
1165 | if (!scanhex(&adrs)) | |
1166 | return; | |
1167 | if (!scanhex(&ncsum)) | |
1168 | return; | |
1169 | fcs = 0xffff; | |
1170 | for (i = 0; i < ncsum; ++i) { | |
1171 | if (mread(adrs+i, &v, 1) == 0) { | |
736256e4 | 1172 | printf("csum stopped at "REG"\n", adrs+i); |
1da177e4 LT |
1173 | break; |
1174 | } | |
1175 | fcs = FCS(fcs, v); | |
1176 | } | |
1177 | printf("%x\n", fcs); | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * Check if this is a suitable place to put a breakpoint. | |
1182 | */ | |
1183 | static long check_bp_loc(unsigned long addr) | |
1184 | { | |
1185 | unsigned int instr; | |
1186 | ||
1187 | addr &= ~3; | |
51fae6de | 1188 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1189 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1190 | return 0; | |
1191 | } | |
1192 | if (!mread(addr, &instr, sizeof(instr))) { | |
1193 | printf("Can't read instruction at address %lx\n", addr); | |
1194 | return 0; | |
1195 | } | |
1196 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1197 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1198 | "instructions\n"); | |
1199 | return 0; | |
1200 | } | |
1201 | return 1; | |
1202 | } | |
1203 | ||
e3bc8049 | 1204 | static char *breakpoint_help_string = |
1da177e4 LT |
1205 | "Breakpoint command usage:\n" |
1206 | "b show breakpoints\n" | |
1207 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1208 | "bc clear all breakpoints\n" | |
1209 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1ad7d705 | 1210 | "bi <addr> [cnt] set hardware instr breakpoint (POWER8 only)\n" |
1da177e4 LT |
1211 | "bd <addr> [cnt] set hardware data breakpoint\n" |
1212 | ""; | |
1213 | ||
1214 | static void | |
1215 | bpt_cmds(void) | |
1216 | { | |
1217 | int cmd; | |
1218 | unsigned long a; | |
1219 | int mode, i; | |
1220 | struct bpt *bp; | |
1221 | const char badaddr[] = "Only kernel addresses are permitted " | |
1222 | "for breakpoints\n"; | |
1223 | ||
1224 | cmd = inchar(); | |
1225 | switch (cmd) { | |
f78541dc | 1226 | #ifndef CONFIG_8xx |
1da177e4 LT |
1227 | case 'd': /* bd - hardware data breakpoint */ |
1228 | mode = 7; | |
1229 | cmd = inchar(); | |
1230 | if (cmd == 'r') | |
1231 | mode = 5; | |
1232 | else if (cmd == 'w') | |
1233 | mode = 6; | |
1234 | else | |
1235 | termch = cmd; | |
1236 | dabr.address = 0; | |
1237 | dabr.enabled = 0; | |
1238 | if (scanhex(&dabr.address)) { | |
51fae6de | 1239 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1240 | printf(badaddr); |
1241 | break; | |
1242 | } | |
9422de3e | 1243 | dabr.address &= ~HW_BRK_TYPE_DABR; |
1da177e4 LT |
1244 | dabr.enabled = mode | BP_DABR; |
1245 | } | |
1246 | break; | |
1247 | ||
1248 | case 'i': /* bi - hardware instr breakpoint */ | |
1ad7d705 | 1249 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { |
1da177e4 LT |
1250 | printf("Hardware instruction breakpoint " |
1251 | "not supported on this cpu\n"); | |
1252 | break; | |
1253 | } | |
1254 | if (iabr) { | |
abb90ee7 | 1255 | iabr->enabled &= ~BP_CIABR; |
1da177e4 LT |
1256 | iabr = NULL; |
1257 | } | |
1258 | if (!scanhex(&a)) | |
1259 | break; | |
1260 | if (!check_bp_loc(a)) | |
1261 | break; | |
1262 | bp = new_breakpoint(a); | |
1263 | if (bp != NULL) { | |
abb90ee7 | 1264 | bp->enabled |= BP_CIABR; |
1da177e4 LT |
1265 | iabr = bp; |
1266 | } | |
1267 | break; | |
f78541dc | 1268 | #endif |
1da177e4 LT |
1269 | |
1270 | case 'c': | |
1271 | if (!scanhex(&a)) { | |
1272 | /* clear all breakpoints */ | |
1273 | for (i = 0; i < NBPTS; ++i) | |
1274 | bpts[i].enabled = 0; | |
1275 | iabr = NULL; | |
1276 | dabr.enabled = 0; | |
1277 | printf("All breakpoints cleared\n"); | |
1278 | break; | |
1279 | } | |
1280 | ||
1281 | if (a <= NBPTS && a >= 1) { | |
1282 | /* assume a breakpoint number */ | |
1283 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1284 | } else { | |
1285 | /* assume a breakpoint address */ | |
1286 | bp = at_breakpoint(a); | |
9f1067c2 | 1287 | if (bp == NULL) { |
736256e4 | 1288 | printf("No breakpoint at %lx\n", a); |
1da177e4 LT |
1289 | break; |
1290 | } | |
1291 | } | |
1292 | ||
736256e4 | 1293 | printf("Cleared breakpoint %lx (", BP_NUM(bp)); |
1da177e4 LT |
1294 | xmon_print_symbol(bp->address, " ", ")\n"); |
1295 | bp->enabled = 0; | |
1296 | break; | |
1297 | ||
1298 | default: | |
1299 | termch = cmd; | |
e3bc8049 | 1300 | cmd = skipbl(); |
1da177e4 LT |
1301 | if (cmd == '?') { |
1302 | printf(breakpoint_help_string); | |
1303 | break; | |
1304 | } | |
1305 | termch = cmd; | |
1306 | if (!scanhex(&a)) { | |
1307 | /* print all breakpoints */ | |
1308 | printf(" type address\n"); | |
1309 | if (dabr.enabled) { | |
f78541dc | 1310 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1311 | if (dabr.enabled & 1) |
1312 | printf("r"); | |
1313 | if (dabr.enabled & 2) | |
1314 | printf("w"); | |
1315 | printf("]\n"); | |
1316 | } | |
1317 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1318 | if (!bp->enabled) | |
1319 | continue; | |
1320 | printf("%2x %s ", BP_NUM(bp), | |
abb90ee7 | 1321 | (bp->enabled & BP_CIABR) ? "inst": "trap"); |
1da177e4 LT |
1322 | xmon_print_symbol(bp->address, " ", "\n"); |
1323 | } | |
1324 | break; | |
1325 | } | |
1326 | ||
1327 | if (!check_bp_loc(a)) | |
1328 | break; | |
1329 | bp = new_breakpoint(a); | |
1330 | if (bp != NULL) | |
1331 | bp->enabled |= BP_TRAP; | |
1332 | break; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | /* Very cheap human name for vector lookup. */ | |
1337 | static | |
1338 | const char *getvecname(unsigned long vec) | |
1339 | { | |
1340 | char *ret; | |
1341 | ||
1342 | switch (vec) { | |
1343 | case 0x100: ret = "(System Reset)"; break; | |
1344 | case 0x200: ret = "(Machine Check)"; break; | |
1345 | case 0x300: ret = "(Data Access)"; break; | |
1346 | case 0x380: ret = "(Data SLB Access)"; break; | |
1347 | case 0x400: ret = "(Instruction Access)"; break; | |
1348 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1349 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1350 | case 0x600: ret = "(Alignment)"; break; | |
1351 | case 0x700: ret = "(Program Check)"; break; | |
1352 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1353 | case 0x900: ret = "(Decrementer)"; break; | |
660e034c ME |
1354 | case 0x980: ret = "(Hypervisor Decrementer)"; break; |
1355 | case 0xa00: ret = "(Doorbell)"; break; | |
1da177e4 LT |
1356 | case 0xc00: ret = "(System Call)"; break; |
1357 | case 0xd00: ret = "(Single Step)"; break; | |
660e034c ME |
1358 | case 0xe40: ret = "(Emulation Assist)"; break; |
1359 | case 0xe60: ret = "(HMI)"; break; | |
1360 | case 0xe80: ret = "(Hypervisor Doorbell)"; break; | |
1da177e4 LT |
1361 | case 0xf00: ret = "(Performance Monitor)"; break; |
1362 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1363 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
660e034c ME |
1364 | case 0x1500: ret = "(Denormalisation)"; break; |
1365 | case 0x1700: ret = "(Altivec Assist)"; break; | |
1da177e4 LT |
1366 | default: ret = ""; |
1367 | } | |
1368 | return ret; | |
1369 | } | |
1370 | ||
1371 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1372 | unsigned long *endp) | |
1373 | { | |
1374 | unsigned long size, offset; | |
1375 | const char *name; | |
1da177e4 LT |
1376 | |
1377 | *startp = *endp = 0; | |
1378 | if (pc == 0) | |
1379 | return; | |
1380 | if (setjmp(bus_error_jmp) == 0) { | |
1381 | catch_memory_errors = 1; | |
1382 | sync(); | |
ffb45122 | 1383 | name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
1da177e4 LT |
1384 | if (name != NULL) { |
1385 | *startp = pc - offset; | |
1386 | *endp = pc - offset + size; | |
1387 | } | |
1388 | sync(); | |
1389 | } | |
1390 | catch_memory_errors = 0; | |
1391 | } | |
1392 | ||
ec2b36b9 BH |
1393 | #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
1394 | #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) | |
1395 | ||
1da177e4 LT |
1396 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1397 | unsigned long pc) | |
1398 | { | |
0104cd68 | 1399 | int max_to_print = 64; |
1da177e4 LT |
1400 | unsigned long ip; |
1401 | unsigned long newsp; | |
1402 | unsigned long marker; | |
1da177e4 LT |
1403 | struct pt_regs regs; |
1404 | ||
0104cd68 | 1405 | while (max_to_print--) { |
1da177e4 LT |
1406 | if (sp < PAGE_OFFSET) { |
1407 | if (sp != 0) | |
1408 | printf("SP (%lx) is in userspace\n", sp); | |
1409 | break; | |
1410 | } | |
1411 | ||
f78541dc | 1412 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1413 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1414 | printf("Couldn't read stack frame at %lx\n", sp); | |
1415 | break; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * For the first stack frame, try to work out if | |
1420 | * LR and/or the saved LR value in the bottommost | |
1421 | * stack frame are valid. | |
1422 | */ | |
1423 | if ((pc | lr) != 0) { | |
1424 | unsigned long fnstart, fnend; | |
1425 | unsigned long nextip; | |
1426 | int printip = 1; | |
1427 | ||
1428 | get_function_bounds(pc, &fnstart, &fnend); | |
1429 | nextip = 0; | |
1430 | if (newsp > sp) | |
f78541dc | 1431 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1432 | sizeof(unsigned long)); |
1433 | if (lr == ip) { | |
1434 | if (lr < PAGE_OFFSET | |
1435 | || (fnstart <= lr && lr < fnend)) | |
1436 | printip = 0; | |
1437 | } else if (lr == nextip) { | |
1438 | printip = 0; | |
1439 | } else if (lr >= PAGE_OFFSET | |
1440 | && !(fnstart <= lr && lr < fnend)) { | |
1441 | printf("[link register ] "); | |
1442 | xmon_print_symbol(lr, " ", "\n"); | |
1443 | } | |
1444 | if (printip) { | |
f78541dc | 1445 | printf("["REG"] ", sp); |
1da177e4 LT |
1446 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1447 | } | |
1448 | pc = lr = 0; | |
1449 | ||
1450 | } else { | |
f78541dc | 1451 | printf("["REG"] ", sp); |
1da177e4 LT |
1452 | xmon_print_symbol(ip, " ", "\n"); |
1453 | } | |
1454 | ||
1455 | /* Look for "regshere" marker to see if this is | |
1456 | an exception frame. */ | |
f78541dc | 1457 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
ec2b36b9 | 1458 | && marker == STACK_FRAME_REGS_MARKER) { |
c4de3809 | 1459 | if (mread(sp + STACK_FRAME_OVERHEAD, ®s, sizeof(regs)) |
1da177e4 LT |
1460 | != sizeof(regs)) { |
1461 | printf("Couldn't read registers at %lx\n", | |
c4de3809 | 1462 | sp + STACK_FRAME_OVERHEAD); |
1da177e4 LT |
1463 | break; |
1464 | } | |
e3bc8049 | 1465 | printf("--- Exception: %lx %s at ", regs.trap, |
1da177e4 LT |
1466 | getvecname(TRAP(®s))); |
1467 | pc = regs.nip; | |
1468 | lr = regs.link; | |
1469 | xmon_print_symbol(pc, " ", "\n"); | |
1470 | } | |
1471 | ||
1472 | if (newsp == 0) | |
1473 | break; | |
1474 | ||
1475 | sp = newsp; | |
0104cd68 | 1476 | } |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | static void backtrace(struct pt_regs *excp) | |
1480 | { | |
1481 | unsigned long sp; | |
1482 | ||
1483 | if (scanhex(&sp)) | |
1484 | xmon_show_stack(sp, 0, 0); | |
1485 | else | |
1486 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1487 | scannl(); | |
1488 | } | |
1489 | ||
1490 | static void print_bug_trap(struct pt_regs *regs) | |
1491 | { | |
ebdba9af | 1492 | #ifdef CONFIG_BUG |
73c9ceab | 1493 | const struct bug_entry *bug; |
1da177e4 LT |
1494 | unsigned long addr; |
1495 | ||
1496 | if (regs->msr & MSR_PR) | |
1497 | return; /* not in kernel */ | |
1498 | addr = regs->nip; /* address of trap instruction */ | |
1499 | if (addr < PAGE_OFFSET) | |
1500 | return; | |
1501 | bug = find_bug(regs->nip); | |
1502 | if (bug == NULL) | |
1503 | return; | |
73c9ceab | 1504 | if (is_warning_bug(bug)) |
1da177e4 LT |
1505 | return; |
1506 | ||
0a7c7efc | 1507 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
73c9ceab JF |
1508 | printf("kernel BUG at %s:%u!\n", |
1509 | bug->file, bug->line); | |
0a7c7efc SR |
1510 | #else |
1511 | printf("kernel BUG at %p!\n", (void *)bug->bug_addr); | |
1512 | #endif | |
ebdba9af | 1513 | #endif /* CONFIG_BUG */ |
1da177e4 LT |
1514 | } |
1515 | ||
9f1067c2 | 1516 | static void excprint(struct pt_regs *fp) |
1da177e4 LT |
1517 | { |
1518 | unsigned long trap; | |
1519 | ||
1520 | #ifdef CONFIG_SMP | |
1521 | printf("cpu 0x%x: ", smp_processor_id()); | |
1522 | #endif /* CONFIG_SMP */ | |
1523 | ||
1524 | trap = TRAP(fp); | |
1525 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1526 | printf(" pc: "); | |
1527 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1528 | ||
1529 | printf(" lr: ", fp->link); | |
1530 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1531 | ||
1532 | printf(" sp: %lx\n", fp->gpr[1]); | |
1533 | printf(" msr: %lx\n", fp->msr); | |
1534 | ||
ce54152f | 1535 | if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) { |
1da177e4 LT |
1536 | printf(" dar: %lx\n", fp->dar); |
1537 | if (trap != 0x380) | |
1538 | printf(" dsisr: %lx\n", fp->dsisr); | |
1539 | } | |
1540 | ||
1541 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1542 | #ifdef CONFIG_PPC64 |
7230c564 BH |
1543 | printf(" paca = 0x%lx\t softe: %d\t irq_happened: 0x%02x\n", |
1544 | local_paca, local_paca->soft_enabled, local_paca->irq_happened); | |
f78541dc | 1545 | #endif |
1da177e4 LT |
1546 | if (current) { |
1547 | printf(" pid = %ld, comm = %s\n", | |
1548 | current->pid, current->comm); | |
1549 | } | |
1550 | ||
1551 | if (trap == 0x700) | |
1552 | print_bug_trap(fp); | |
eb925d64 RG |
1553 | |
1554 | printf(linux_banner); | |
1da177e4 LT |
1555 | } |
1556 | ||
9f1067c2 | 1557 | static void prregs(struct pt_regs *fp) |
1da177e4 | 1558 | { |
f78541dc | 1559 | int n, trap; |
1da177e4 LT |
1560 | unsigned long base; |
1561 | struct pt_regs regs; | |
1562 | ||
1563 | if (scanhex(&base)) { | |
1564 | if (setjmp(bus_error_jmp) == 0) { | |
1565 | catch_memory_errors = 1; | |
1566 | sync(); | |
1567 | regs = *(struct pt_regs *)base; | |
1568 | sync(); | |
1569 | __delay(200); | |
1570 | } else { | |
1571 | catch_memory_errors = 0; | |
f78541dc | 1572 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1573 | base); |
1574 | return; | |
1575 | } | |
1576 | catch_memory_errors = 0; | |
1577 | fp = ®s; | |
1578 | } | |
1579 | ||
f78541dc | 1580 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1581 | if (FULL_REGS(fp)) { |
1582 | for (n = 0; n < 16; ++n) | |
f78541dc | 1583 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1584 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1585 | } else { | |
1586 | for (n = 0; n < 7; ++n) | |
f78541dc | 1587 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1588 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1589 | } | |
f78541dc PM |
1590 | #else |
1591 | for (n = 0; n < 32; ++n) { | |
1592 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1593 | (n & 3) == 3? "\n": " "); | |
1594 | if (n == 12 && !FULL_REGS(fp)) { | |
1595 | printf("\n"); | |
1596 | break; | |
1597 | } | |
1598 | } | |
1599 | #endif | |
1da177e4 LT |
1600 | printf("pc = "); |
1601 | xmon_print_symbol(fp->nip, " ", "\n"); | |
48404f2e PM |
1602 | if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
1603 | printf("cfar= "); | |
1604 | xmon_print_symbol(fp->orig_gpr3, " ", "\n"); | |
1605 | } | |
1da177e4 LT |
1606 | printf("lr = "); |
1607 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1608 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1609 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1610 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1611 | trap = TRAP(fp); |
1612 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1613 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1614 | } |
1615 | ||
9f1067c2 | 1616 | static void cacheflush(void) |
1da177e4 LT |
1617 | { |
1618 | int cmd; | |
1619 | unsigned long nflush; | |
1620 | ||
1621 | cmd = inchar(); | |
1622 | if (cmd != 'i') | |
1623 | termch = cmd; | |
1624 | scanhex((void *)&adrs); | |
1625 | if (termch != '\n') | |
1626 | termch = 0; | |
1627 | nflush = 1; | |
1628 | scanhex(&nflush); | |
1629 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1630 | if (setjmp(bus_error_jmp) == 0) { | |
1631 | catch_memory_errors = 1; | |
1632 | sync(); | |
1633 | ||
1634 | if (cmd != 'i') { | |
1635 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1636 | cflush((void *) adrs); | |
1637 | } else { | |
1638 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1639 | cinval((void *) adrs); | |
1640 | } | |
1641 | sync(); | |
1642 | /* wait a little while to see if we get a machine check */ | |
1643 | __delay(200); | |
1644 | } | |
1645 | catch_memory_errors = 0; | |
1646 | } | |
1647 | ||
31cdd0c3 PM |
1648 | extern unsigned long xmon_mfspr(int spr, unsigned long default_value); |
1649 | extern void xmon_mtspr(int spr, unsigned long value); | |
1650 | ||
1651 | static int | |
1652 | read_spr(int n, unsigned long *vp) | |
1da177e4 | 1653 | { |
1da177e4 | 1654 | unsigned long ret = -1UL; |
31cdd0c3 | 1655 | int ok = 0; |
1da177e4 LT |
1656 | |
1657 | if (setjmp(bus_error_jmp) == 0) { | |
31cdd0c3 | 1658 | catch_spr_faults = 1; |
1da177e4 LT |
1659 | sync(); |
1660 | ||
31cdd0c3 | 1661 | ret = xmon_mfspr(n, *vp); |
1da177e4 LT |
1662 | |
1663 | sync(); | |
31cdd0c3 PM |
1664 | *vp = ret; |
1665 | ok = 1; | |
1da177e4 | 1666 | } |
31cdd0c3 | 1667 | catch_spr_faults = 0; |
1da177e4 | 1668 | |
31cdd0c3 | 1669 | return ok; |
1da177e4 LT |
1670 | } |
1671 | ||
9f1067c2 | 1672 | static void |
1da177e4 LT |
1673 | write_spr(int n, unsigned long val) |
1674 | { | |
1da177e4 | 1675 | if (setjmp(bus_error_jmp) == 0) { |
31cdd0c3 | 1676 | catch_spr_faults = 1; |
1da177e4 LT |
1677 | sync(); |
1678 | ||
31cdd0c3 | 1679 | xmon_mtspr(n, val); |
1da177e4 LT |
1680 | |
1681 | sync(); | |
31cdd0c3 PM |
1682 | } else { |
1683 | printf("SPR 0x%03x (%4d) Faulted during write\n", n, n); | |
1da177e4 | 1684 | } |
31cdd0c3 | 1685 | catch_spr_faults = 0; |
1da177e4 LT |
1686 | } |
1687 | ||
1846193b ME |
1688 | static void dump_206_sprs(void) |
1689 | { | |
1690 | #ifdef CONFIG_PPC64 | |
1691 | if (!cpu_has_feature(CPU_FTR_ARCH_206)) | |
1692 | return; | |
1693 | ||
1694 | /* Actually some of these pre-date 2.06, but whatevs */ | |
1695 | ||
1696 | printf("srr0 = %.16x srr1 = %.16x dsisr = %.8x\n", | |
1697 | mfspr(SPRN_SRR0), mfspr(SPRN_SRR1), mfspr(SPRN_DSISR)); | |
1698 | printf("dscr = %.16x ppr = %.16x pir = %.8x\n", | |
1699 | mfspr(SPRN_DSCR), mfspr(SPRN_PPR), mfspr(SPRN_PIR)); | |
1700 | ||
1701 | if (!(mfmsr() & MSR_HV)) | |
1702 | return; | |
1703 | ||
1704 | printf("sdr1 = %.16x hdar = %.16x hdsisr = %.8x\n", | |
1705 | mfspr(SPRN_SDR1), mfspr(SPRN_HDAR), mfspr(SPRN_HDSISR)); | |
1706 | printf("hsrr0 = %.16x hsrr1 = %.16x hdec = %.8x\n", | |
1707 | mfspr(SPRN_HSRR0), mfspr(SPRN_HSRR1), mfspr(SPRN_HDEC)); | |
1708 | printf("lpcr = %.16x pcr = %.16x lpidr = %.8x\n", | |
1709 | mfspr(SPRN_LPCR), mfspr(SPRN_PCR), mfspr(SPRN_LPID)); | |
1710 | printf("hsprg0 = %.16x hsprg1 = %.16x\n", | |
1711 | mfspr(SPRN_HSPRG0), mfspr(SPRN_HSPRG1)); | |
1712 | printf("dabr = %.16x dabrx = %.16x\n", | |
1713 | mfspr(SPRN_DABR), mfspr(SPRN_DABRX)); | |
1714 | #endif | |
1715 | } | |
1716 | ||
e0ddf7a2 ME |
1717 | static void dump_207_sprs(void) |
1718 | { | |
1719 | #ifdef CONFIG_PPC64 | |
1720 | unsigned long msr; | |
1721 | ||
1722 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
1723 | return; | |
1724 | ||
1725 | printf("dpdes = %.16x tir = %.16x cir = %.8x\n", | |
1726 | mfspr(SPRN_DPDES), mfspr(SPRN_TIR), mfspr(SPRN_CIR)); | |
1727 | ||
1728 | printf("fscr = %.16x tar = %.16x pspb = %.8x\n", | |
1729 | mfspr(SPRN_FSCR), mfspr(SPRN_TAR), mfspr(SPRN_PSPB)); | |
1730 | ||
1731 | msr = mfmsr(); | |
1732 | if (msr & MSR_TM) { | |
1733 | /* Only if TM has been enabled in the kernel */ | |
1734 | printf("tfhar = %.16x tfiar = %.16x texasr = %.16x\n", | |
1735 | mfspr(SPRN_TFHAR), mfspr(SPRN_TFIAR), | |
1736 | mfspr(SPRN_TEXASR)); | |
1737 | } | |
1738 | ||
1739 | printf("mmcr0 = %.16x mmcr1 = %.16x mmcr2 = %.16x\n", | |
1740 | mfspr(SPRN_MMCR0), mfspr(SPRN_MMCR1), mfspr(SPRN_MMCR2)); | |
1741 | printf("pmc1 = %.8x pmc2 = %.8x pmc3 = %.8x pmc4 = %.8x\n", | |
1742 | mfspr(SPRN_PMC1), mfspr(SPRN_PMC2), | |
1743 | mfspr(SPRN_PMC3), mfspr(SPRN_PMC4)); | |
1744 | printf("mmcra = %.16x siar = %.16x pmc5 = %.8x\n", | |
1745 | mfspr(SPRN_MMCRA), mfspr(SPRN_SIAR), mfspr(SPRN_PMC5)); | |
1746 | printf("sdar = %.16x sier = %.16x pmc6 = %.8x\n", | |
1747 | mfspr(SPRN_SDAR), mfspr(SPRN_SIER), mfspr(SPRN_PMC6)); | |
1748 | printf("ebbhr = %.16x ebbrr = %.16x bescr = %.16x\n", | |
1749 | mfspr(SPRN_EBBHR), mfspr(SPRN_EBBRR), mfspr(SPRN_BESCR)); | |
1750 | ||
1751 | if (!(msr & MSR_HV)) | |
1752 | return; | |
1753 | ||
1754 | printf("hfscr = %.16x dhdes = %.16x rpr = %.16x\n", | |
1755 | mfspr(SPRN_HFSCR), mfspr(SPRN_DHDES), mfspr(SPRN_RPR)); | |
1756 | printf("dawr = %.16x dawrx = %.16x ciabr = %.16x\n", | |
1757 | mfspr(SPRN_DAWR), mfspr(SPRN_DAWRX), mfspr(SPRN_CIABR)); | |
1758 | #endif | |
1759 | } | |
1da177e4 | 1760 | |
31cdd0c3 PM |
1761 | static void dump_one_spr(int spr, bool show_unimplemented) |
1762 | { | |
1763 | unsigned long val; | |
1764 | ||
1765 | val = 0xdeadbeef; | |
1766 | if (!read_spr(spr, &val)) { | |
1767 | printf("SPR 0x%03x (%4d) Faulted during read\n", spr, spr); | |
1768 | return; | |
1769 | } | |
1770 | ||
1771 | if (val == 0xdeadbeef) { | |
1772 | /* Looks like read was a nop, confirm */ | |
1773 | val = 0x0badcafe; | |
1774 | if (!read_spr(spr, &val)) { | |
1775 | printf("SPR 0x%03x (%4d) Faulted during read\n", spr, spr); | |
1776 | return; | |
1777 | } | |
1778 | ||
1779 | if (val == 0x0badcafe) { | |
1780 | if (show_unimplemented) | |
1781 | printf("SPR 0x%03x (%4d) Unimplemented\n", spr, spr); | |
1782 | return; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | printf("SPR 0x%03x (%4d) = 0x%lx\n", spr, spr, val); | |
1787 | } | |
1788 | ||
9f1067c2 | 1789 | static void super_regs(void) |
1da177e4 | 1790 | { |
13629dad | 1791 | static unsigned long regno; |
1da177e4 | 1792 | int cmd; |
31cdd0c3 | 1793 | int spr; |
1da177e4 LT |
1794 | |
1795 | cmd = skipbl(); | |
31cdd0c3 PM |
1796 | |
1797 | switch (cmd) { | |
1798 | case '\n': { | |
e3bc8049 | 1799 | unsigned long sp, toc; |
1da177e4 LT |
1800 | asm("mr %0,1" : "=r" (sp) :); |
1801 | asm("mr %0,2" : "=r" (toc) :); | |
1802 | ||
56346ad8 | 1803 | printf("msr = "REG" sprg0 = "REG"\n", |
f78541dc | 1804 | mfmsr(), mfspr(SPRN_SPRG0)); |
56346ad8 | 1805 | printf("pvr = "REG" sprg1 = "REG"\n", |
e3bc8049 | 1806 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
56346ad8 | 1807 | printf("dec = "REG" sprg2 = "REG"\n", |
f78541dc | 1808 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); |
56346ad8 ME |
1809 | printf("sp = "REG" sprg3 = "REG"\n", sp, mfspr(SPRN_SPRG3)); |
1810 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1811 | ||
1846193b | 1812 | dump_206_sprs(); |
e0ddf7a2 | 1813 | dump_207_sprs(); |
1846193b | 1814 | |
1da177e4 LT |
1815 | return; |
1816 | } | |
31cdd0c3 PM |
1817 | case 'w': { |
1818 | unsigned long val; | |
1819 | scanhex(®no); | |
1820 | val = 0; | |
1821 | read_spr(regno, &val); | |
1da177e4 LT |
1822 | scanhex(&val); |
1823 | write_spr(regno, val); | |
31cdd0c3 PM |
1824 | dump_one_spr(regno, true); |
1825 | break; | |
1826 | } | |
1da177e4 | 1827 | case 'r': |
31cdd0c3 PM |
1828 | scanhex(®no); |
1829 | dump_one_spr(regno, true); | |
1830 | break; | |
1831 | case 'a': | |
1832 | /* dump ALL SPRs */ | |
1833 | for (spr = 1; spr < 1024; ++spr) | |
1834 | dump_one_spr(spr, false); | |
1da177e4 | 1835 | break; |
1da177e4 | 1836 | } |
31cdd0c3 | 1837 | |
1da177e4 LT |
1838 | scannl(); |
1839 | } | |
1840 | ||
1841 | /* | |
1842 | * Stuff for reading and writing memory safely | |
1843 | */ | |
9f1067c2 | 1844 | static int |
1da177e4 LT |
1845 | mread(unsigned long adrs, void *buf, int size) |
1846 | { | |
1847 | volatile int n; | |
1848 | char *p, *q; | |
1849 | ||
1850 | n = 0; | |
1851 | if (setjmp(bus_error_jmp) == 0) { | |
1852 | catch_memory_errors = 1; | |
1853 | sync(); | |
1854 | p = (char *)adrs; | |
1855 | q = (char *)buf; | |
1856 | switch (size) { | |
1857 | case 2: | |
f78541dc | 1858 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1859 | break; |
1860 | case 4: | |
f78541dc | 1861 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1862 | break; |
1863 | case 8: | |
f78541dc | 1864 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1865 | break; |
1866 | default: | |
1867 | for( ; n < size; ++n) { | |
1868 | *q++ = *p++; | |
1869 | sync(); | |
1870 | } | |
1871 | } | |
1872 | sync(); | |
1873 | /* wait a little while to see if we get a machine check */ | |
1874 | __delay(200); | |
1875 | n = size; | |
1876 | } | |
1877 | catch_memory_errors = 0; | |
1878 | return n; | |
1879 | } | |
1880 | ||
9f1067c2 | 1881 | static int |
1da177e4 LT |
1882 | mwrite(unsigned long adrs, void *buf, int size) |
1883 | { | |
1884 | volatile int n; | |
1885 | char *p, *q; | |
1886 | ||
1887 | n = 0; | |
1888 | if (setjmp(bus_error_jmp) == 0) { | |
1889 | catch_memory_errors = 1; | |
1890 | sync(); | |
1891 | p = (char *) adrs; | |
1892 | q = (char *) buf; | |
1893 | switch (size) { | |
1894 | case 2: | |
f78541dc | 1895 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1896 | break; |
1897 | case 4: | |
f78541dc | 1898 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1899 | break; |
1900 | case 8: | |
f78541dc | 1901 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1902 | break; |
1903 | default: | |
1904 | for ( ; n < size; ++n) { | |
1905 | *p++ = *q++; | |
1906 | sync(); | |
1907 | } | |
1908 | } | |
1909 | sync(); | |
1910 | /* wait a little while to see if we get a machine check */ | |
1911 | __delay(200); | |
1912 | n = size; | |
1913 | } else { | |
736256e4 | 1914 | printf("*** Error writing address "REG"\n", adrs + n); |
1da177e4 LT |
1915 | } |
1916 | catch_memory_errors = 0; | |
1917 | return n; | |
1918 | } | |
1919 | ||
1920 | static int fault_type; | |
f78541dc | 1921 | static int fault_except; |
1da177e4 LT |
1922 | static char *fault_chars[] = { "--", "**", "##" }; |
1923 | ||
f78541dc | 1924 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1925 | { |
f78541dc | 1926 | fault_except = TRAP(regs); |
1da177e4 LT |
1927 | switch (TRAP(regs)) { |
1928 | case 0x200: | |
1929 | fault_type = 0; | |
1930 | break; | |
1931 | case 0x300: | |
1932 | case 0x380: | |
1933 | fault_type = 1; | |
1934 | break; | |
1935 | default: | |
1936 | fault_type = 2; | |
1937 | } | |
1938 | ||
1939 | longjmp(bus_error_jmp, 1); | |
1940 | ||
1941 | return 0; | |
1942 | } | |
1943 | ||
1944 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1945 | ||
9f1067c2 | 1946 | static void |
1da177e4 LT |
1947 | byterev(unsigned char *val, int size) |
1948 | { | |
1949 | int t; | |
1950 | ||
1951 | switch (size) { | |
1952 | case 2: | |
1953 | SWAP(val[0], val[1], t); | |
1954 | break; | |
1955 | case 4: | |
1956 | SWAP(val[0], val[3], t); | |
1957 | SWAP(val[1], val[2], t); | |
1958 | break; | |
1959 | case 8: /* is there really any use for this? */ | |
1960 | SWAP(val[0], val[7], t); | |
1961 | SWAP(val[1], val[6], t); | |
1962 | SWAP(val[2], val[5], t); | |
1963 | SWAP(val[3], val[4], t); | |
1964 | break; | |
1965 | } | |
1966 | } | |
1967 | ||
1968 | static int brev; | |
1969 | static int mnoread; | |
1970 | ||
e3bc8049 | 1971 | static char *memex_help_string = |
1da177e4 LT |
1972 | "Memory examine command usage:\n" |
1973 | "m [addr] [flags] examine/change memory\n" | |
1974 | " addr is optional. will start where left off.\n" | |
1975 | " flags may include chars from this set:\n" | |
1976 | " b modify by bytes (default)\n" | |
1977 | " w modify by words (2 byte)\n" | |
1978 | " l modify by longs (4 byte)\n" | |
1979 | " d modify by doubleword (8 byte)\n" | |
1980 | " r toggle reverse byte order mode\n" | |
1981 | " n do not read memory (for i/o spaces)\n" | |
1982 | " . ok to read (default)\n" | |
1983 | "NOTE: flags are saved as defaults\n" | |
1984 | ""; | |
1985 | ||
e3bc8049 | 1986 | static char *memex_subcmd_help_string = |
1da177e4 LT |
1987 | "Memory examine subcommands:\n" |
1988 | " hexval write this val to current location\n" | |
1989 | " 'string' write chars from string to this location\n" | |
1990 | " ' increment address\n" | |
1991 | " ^ decrement address\n" | |
1992 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1993 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1994 | " ` clear no-read flag\n" | |
1995 | " ; stay at this addr\n" | |
1996 | " v change to byte mode\n" | |
1997 | " w change to word (2 byte) mode\n" | |
1998 | " l change to long (4 byte) mode\n" | |
1999 | " u change to doubleword (8 byte) mode\n" | |
2000 | " m addr change current addr\n" | |
2001 | " n toggle no-read flag\n" | |
2002 | " r toggle byte reverse flag\n" | |
2003 | " < count back up count bytes\n" | |
2004 | " > count skip forward count bytes\n" | |
2005 | " x exit this mode\n" | |
2006 | ""; | |
2007 | ||
9f1067c2 | 2008 | static void |
1da177e4 LT |
2009 | memex(void) |
2010 | { | |
2011 | int cmd, inc, i, nslash; | |
2012 | unsigned long n; | |
2013 | unsigned char val[16]; | |
2014 | ||
2015 | scanhex((void *)&adrs); | |
2016 | cmd = skipbl(); | |
2017 | if (cmd == '?') { | |
2018 | printf(memex_help_string); | |
2019 | return; | |
2020 | } else { | |
2021 | termch = cmd; | |
2022 | } | |
2023 | last_cmd = "m\n"; | |
2024 | while ((cmd = skipbl()) != '\n') { | |
2025 | switch( cmd ){ | |
2026 | case 'b': size = 1; break; | |
2027 | case 'w': size = 2; break; | |
2028 | case 'l': size = 4; break; | |
2029 | case 'd': size = 8; break; | |
2030 | case 'r': brev = !brev; break; | |
2031 | case 'n': mnoread = 1; break; | |
2032 | case '.': mnoread = 0; break; | |
2033 | } | |
2034 | } | |
2035 | if( size <= 0 ) | |
2036 | size = 1; | |
2037 | else if( size > 8 ) | |
2038 | size = 8; | |
2039 | for(;;){ | |
2040 | if (!mnoread) | |
2041 | n = mread(adrs, val, size); | |
e1449ed9 | 2042 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
2043 | if (!mnoread) { |
2044 | if (brev) | |
2045 | byterev(val, size); | |
2046 | putchar(' '); | |
2047 | for (i = 0; i < n; ++i) | |
2048 | printf("%.2x", val[i]); | |
2049 | for (; i < size; ++i) | |
2050 | printf("%s", fault_chars[fault_type]); | |
2051 | } | |
2052 | putchar(' '); | |
2053 | inc = size; | |
2054 | nslash = 0; | |
2055 | for(;;){ | |
2056 | if( scanhex(&n) ){ | |
2057 | for (i = 0; i < size; ++i) | |
2058 | val[i] = n >> (i * 8); | |
2059 | if (!brev) | |
2060 | byterev(val, size); | |
2061 | mwrite(adrs, val, size); | |
2062 | inc = size; | |
2063 | } | |
2064 | cmd = skipbl(); | |
2065 | if (cmd == '\n') | |
2066 | break; | |
2067 | inc = 0; | |
2068 | switch (cmd) { | |
2069 | case '\'': | |
2070 | for(;;){ | |
2071 | n = inchar(); | |
2072 | if( n == '\\' ) | |
2073 | n = bsesc(); | |
2074 | else if( n == '\'' ) | |
2075 | break; | |
2076 | for (i = 0; i < size; ++i) | |
2077 | val[i] = n >> (i * 8); | |
2078 | if (!brev) | |
2079 | byterev(val, size); | |
2080 | mwrite(adrs, val, size); | |
2081 | adrs += size; | |
2082 | } | |
2083 | adrs -= size; | |
2084 | inc = size; | |
2085 | break; | |
2086 | case ',': | |
2087 | adrs += size; | |
2088 | break; | |
2089 | case '.': | |
2090 | mnoread = 0; | |
2091 | break; | |
2092 | case ';': | |
2093 | break; | |
2094 | case 'x': | |
2095 | case EOF: | |
2096 | scannl(); | |
2097 | return; | |
2098 | case 'b': | |
2099 | case 'v': | |
2100 | size = 1; | |
2101 | break; | |
2102 | case 'w': | |
2103 | size = 2; | |
2104 | break; | |
2105 | case 'l': | |
2106 | size = 4; | |
2107 | break; | |
2108 | case 'u': | |
2109 | size = 8; | |
2110 | break; | |
2111 | case '^': | |
2112 | adrs -= size; | |
2113 | break; | |
1da177e4 LT |
2114 | case '/': |
2115 | if (nslash > 0) | |
2116 | adrs -= 1 << nslash; | |
2117 | else | |
2118 | nslash = 0; | |
2119 | nslash += 4; | |
2120 | adrs += 1 << nslash; | |
2121 | break; | |
2122 | case '\\': | |
2123 | if (nslash < 0) | |
2124 | adrs += 1 << -nslash; | |
2125 | else | |
2126 | nslash = 0; | |
2127 | nslash -= 4; | |
2128 | adrs -= 1 << -nslash; | |
2129 | break; | |
2130 | case 'm': | |
2131 | scanhex((void *)&adrs); | |
2132 | break; | |
2133 | case 'n': | |
2134 | mnoread = 1; | |
2135 | break; | |
2136 | case 'r': | |
2137 | brev = !brev; | |
2138 | break; | |
2139 | case '<': | |
2140 | n = size; | |
2141 | scanhex(&n); | |
2142 | adrs -= n; | |
2143 | break; | |
2144 | case '>': | |
2145 | n = size; | |
2146 | scanhex(&n); | |
2147 | adrs += n; | |
2148 | break; | |
2149 | case '?': | |
2150 | printf(memex_subcmd_help_string); | |
2151 | break; | |
2152 | } | |
2153 | } | |
2154 | adrs += inc; | |
2155 | } | |
2156 | } | |
2157 | ||
9f1067c2 | 2158 | static int |
1da177e4 LT |
2159 | bsesc(void) |
2160 | { | |
2161 | int c; | |
2162 | ||
2163 | c = inchar(); | |
2164 | switch( c ){ | |
2165 | case 'n': c = '\n'; break; | |
2166 | case 'r': c = '\r'; break; | |
2167 | case 'b': c = '\b'; break; | |
2168 | case 't': c = '\t'; break; | |
2169 | } | |
2170 | return c; | |
2171 | } | |
2172 | ||
7e5b5938 OH |
2173 | static void xmon_rawdump (unsigned long adrs, long ndump) |
2174 | { | |
2175 | long n, m, r, nr; | |
2176 | unsigned char temp[16]; | |
2177 | ||
2178 | for (n = ndump; n > 0;) { | |
2179 | r = n < 16? n: 16; | |
2180 | nr = mread(adrs, temp, r); | |
2181 | adrs += nr; | |
2182 | for (m = 0; m < r; ++m) { | |
2183 | if (m < nr) | |
2184 | printf("%.2x", temp[m]); | |
2185 | else | |
2186 | printf("%s", fault_chars[fault_type]); | |
2187 | } | |
2188 | n -= r; | |
2189 | if (nr < r) | |
2190 | break; | |
2191 | } | |
2192 | printf("\n"); | |
2193 | } | |
2194 | ||
ddadb6b8 ME |
2195 | #ifdef CONFIG_PPC64 |
2196 | static void dump_one_paca(int cpu) | |
2197 | { | |
2198 | struct paca_struct *p; | |
ad987fc8 ME |
2199 | #ifdef CONFIG_PPC_STD_MMU_64 |
2200 | int i = 0; | |
2201 | #endif | |
ddadb6b8 ME |
2202 | |
2203 | if (setjmp(bus_error_jmp) != 0) { | |
2204 | printf("*** Error dumping paca for cpu 0x%x!\n", cpu); | |
2205 | return; | |
2206 | } | |
2207 | ||
2208 | catch_memory_errors = 1; | |
2209 | sync(); | |
2210 | ||
2211 | p = &paca[cpu]; | |
2212 | ||
2213 | printf("paca for cpu 0x%x @ %p:\n", cpu, p); | |
2214 | ||
ad987fc8 ME |
2215 | printf(" %-*s = %s\n", 20, "possible", cpu_possible(cpu) ? "yes" : "no"); |
2216 | printf(" %-*s = %s\n", 20, "present", cpu_present(cpu) ? "yes" : "no"); | |
2217 | printf(" %-*s = %s\n", 20, "online", cpu_online(cpu) ? "yes" : "no"); | |
ddadb6b8 ME |
2218 | |
2219 | #define DUMP(paca, name, format) \ | |
ad987fc8 | 2220 | printf(" %-*s = %#-*"format"\t(0x%lx)\n", 20, #name, 18, paca->name, \ |
ddadb6b8 ME |
2221 | offsetof(struct paca_struct, name)); |
2222 | ||
2223 | DUMP(p, lock_token, "x"); | |
2224 | DUMP(p, paca_index, "x"); | |
2225 | DUMP(p, kernel_toc, "lx"); | |
2226 | DUMP(p, kernelbase, "lx"); | |
2227 | DUMP(p, kernel_msr, "lx"); | |
ddadb6b8 | 2228 | DUMP(p, emergency_sp, "p"); |
729b0f71 MS |
2229 | #ifdef CONFIG_PPC_BOOK3S_64 |
2230 | DUMP(p, mc_emergency_sp, "p"); | |
2231 | DUMP(p, in_mce, "x"); | |
ad987fc8 | 2232 | DUMP(p, hmi_event_available, "x"); |
729b0f71 | 2233 | #endif |
ddadb6b8 ME |
2234 | DUMP(p, data_offset, "lx"); |
2235 | DUMP(p, hw_cpu_id, "x"); | |
2236 | DUMP(p, cpu_start, "x"); | |
2237 | DUMP(p, kexec_state, "x"); | |
ad987fc8 ME |
2238 | #ifdef CONFIG_PPC_STD_MMU_64 |
2239 | for (i = 0; i < SLB_NUM_BOLTED; i++) { | |
2240 | u64 esid, vsid; | |
2241 | ||
2242 | if (!p->slb_shadow_ptr) | |
2243 | continue; | |
2244 | ||
2245 | esid = be64_to_cpu(p->slb_shadow_ptr->save_area[i].esid); | |
2246 | vsid = be64_to_cpu(p->slb_shadow_ptr->save_area[i].vsid); | |
2247 | ||
2248 | if (esid || vsid) { | |
2249 | printf(" slb_shadow[%d]: = 0x%016lx 0x%016lx\n", | |
2250 | i, esid, vsid); | |
2251 | } | |
2252 | } | |
2253 | DUMP(p, vmalloc_sllp, "x"); | |
2254 | DUMP(p, slb_cache_ptr, "x"); | |
2255 | for (i = 0; i < SLB_CACHE_ENTRIES; i++) | |
2256 | printf(" slb_cache[%d]: = 0x%016lx\n", i, p->slb_cache[i]); | |
2257 | #endif | |
2258 | DUMP(p, dscr_default, "llx"); | |
2259 | #ifdef CONFIG_PPC_BOOK3E | |
2260 | DUMP(p, pgd, "p"); | |
2261 | DUMP(p, kernel_pgd, "p"); | |
2262 | DUMP(p, tcd_ptr, "p"); | |
2263 | DUMP(p, mc_kstack, "p"); | |
2264 | DUMP(p, crit_kstack, "p"); | |
2265 | DUMP(p, dbg_kstack, "p"); | |
2266 | #endif | |
ddadb6b8 ME |
2267 | DUMP(p, __current, "p"); |
2268 | DUMP(p, kstack, "lx"); | |
2269 | DUMP(p, stab_rr, "lx"); | |
2270 | DUMP(p, saved_r1, "lx"); | |
2271 | DUMP(p, trap_save, "x"); | |
2272 | DUMP(p, soft_enabled, "x"); | |
2273 | DUMP(p, irq_happened, "x"); | |
2274 | DUMP(p, io_sync, "x"); | |
2275 | DUMP(p, irq_work_pending, "x"); | |
2276 | DUMP(p, nap_state_lost, "x"); | |
ad987fc8 ME |
2277 | DUMP(p, sprg_vdso, "llx"); |
2278 | ||
2279 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM | |
2280 | DUMP(p, tm_scratch, "llx"); | |
2281 | #endif | |
2282 | ||
2283 | #ifdef CONFIG_PPC_POWERNV | |
2284 | DUMP(p, core_idle_state_ptr, "p"); | |
2285 | DUMP(p, thread_idle_state, "x"); | |
2286 | DUMP(p, thread_mask, "x"); | |
2287 | DUMP(p, subcore_sibling_mask, "x"); | |
2288 | #endif | |
ddadb6b8 | 2289 | |
c223c903 CL |
2290 | DUMP(p, accounting.user_time, "llx"); |
2291 | DUMP(p, accounting.system_time, "llx"); | |
2292 | DUMP(p, accounting.user_time_scaled, "llx"); | |
2293 | DUMP(p, accounting.starttime, "llx"); | |
2294 | DUMP(p, accounting.starttime_user, "llx"); | |
2295 | DUMP(p, accounting.startspurr, "llx"); | |
2296 | DUMP(p, accounting.utime_sspurr, "llx"); | |
ad987fc8 | 2297 | DUMP(p, stolen_time, "llx"); |
ddadb6b8 ME |
2298 | #undef DUMP |
2299 | ||
2300 | catch_memory_errors = 0; | |
2301 | sync(); | |
2302 | } | |
2303 | ||
2304 | static void dump_all_pacas(void) | |
2305 | { | |
2306 | int cpu; | |
2307 | ||
2308 | if (num_possible_cpus() == 0) { | |
2309 | printf("No possible cpus, use 'dp #' to dump individual cpus\n"); | |
2310 | return; | |
2311 | } | |
2312 | ||
2313 | for_each_possible_cpu(cpu) | |
2314 | dump_one_paca(cpu); | |
2315 | } | |
2316 | ||
2317 | static void dump_pacas(void) | |
2318 | { | |
2319 | unsigned long num; | |
2320 | int c; | |
2321 | ||
2322 | c = inchar(); | |
2323 | if (c == 'a') { | |
2324 | dump_all_pacas(); | |
2325 | return; | |
2326 | } | |
2327 | ||
2328 | termch = c; /* Put c back, it wasn't 'a' */ | |
2329 | ||
2330 | if (scanhex(&num)) | |
2331 | dump_one_paca(num); | |
2332 | else | |
2333 | dump_one_paca(xmon_owner); | |
2334 | } | |
2335 | #endif | |
2336 | ||
9f1067c2 | 2337 | static void |
1da177e4 LT |
2338 | dump(void) |
2339 | { | |
2340 | int c; | |
2341 | ||
2342 | c = inchar(); | |
ddadb6b8 ME |
2343 | |
2344 | #ifdef CONFIG_PPC64 | |
2345 | if (c == 'p') { | |
958b7c80 | 2346 | xmon_start_pagination(); |
ddadb6b8 | 2347 | dump_pacas(); |
958b7c80 | 2348 | xmon_end_pagination(); |
ddadb6b8 ME |
2349 | return; |
2350 | } | |
2351 | #endif | |
2352 | ||
1da177e4 LT |
2353 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') |
2354 | termch = c; | |
2355 | scanhex((void *)&adrs); | |
2356 | if (termch != '\n') | |
2357 | termch = 0; | |
2358 | if (c == 'i') { | |
2359 | scanhex(&nidump); | |
2360 | if (nidump == 0) | |
2361 | nidump = 16; | |
2362 | else if (nidump > MAX_DUMP) | |
2363 | nidump = MAX_DUMP; | |
2364 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
2365 | last_cmd = "di\n"; | |
f312deb4 VS |
2366 | } else if (c == 'l') { |
2367 | dump_log_buf(); | |
fde93a0f AD |
2368 | } else if (c == 'o') { |
2369 | dump_opal_msglog(); | |
56144ec7 ME |
2370 | } else if (c == 't') { |
2371 | ftrace_dump(DUMP_ALL); | |
2372 | tracing_on(); | |
7e5b5938 OH |
2373 | } else if (c == 'r') { |
2374 | scanhex(&ndump); | |
2375 | if (ndump == 0) | |
2376 | ndump = 64; | |
2377 | xmon_rawdump(adrs, ndump); | |
2378 | adrs += ndump; | |
2379 | last_cmd = "dr\n"; | |
1da177e4 LT |
2380 | } else { |
2381 | scanhex(&ndump); | |
2382 | if (ndump == 0) | |
2383 | ndump = 64; | |
2384 | else if (ndump > MAX_DUMP) | |
2385 | ndump = MAX_DUMP; | |
2386 | prdump(adrs, ndump); | |
2387 | adrs += ndump; | |
2388 | last_cmd = "d\n"; | |
2389 | } | |
2390 | } | |
2391 | ||
9f1067c2 | 2392 | static void |
1da177e4 LT |
2393 | prdump(unsigned long adrs, long ndump) |
2394 | { | |
2395 | long n, m, c, r, nr; | |
2396 | unsigned char temp[16]; | |
2397 | ||
2398 | for (n = ndump; n > 0;) { | |
f78541dc | 2399 | printf(REG, adrs); |
1da177e4 LT |
2400 | putchar(' '); |
2401 | r = n < 16? n: 16; | |
2402 | nr = mread(adrs, temp, r); | |
2403 | adrs += nr; | |
2404 | for (m = 0; m < r; ++m) { | |
e3bc8049 | 2405 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
e1449ed9 | 2406 | putchar(' '); |
1da177e4 LT |
2407 | if (m < nr) |
2408 | printf("%.2x", temp[m]); | |
2409 | else | |
2410 | printf("%s", fault_chars[fault_type]); | |
2411 | } | |
e1449ed9 | 2412 | for (; m < 16; ++m) { |
e3bc8049 | 2413 | if ((m & (sizeof(long) - 1)) == 0) |
e1449ed9 | 2414 | putchar(' '); |
1da177e4 | 2415 | printf(" "); |
e1449ed9 | 2416 | } |
1da177e4 LT |
2417 | printf(" |"); |
2418 | for (m = 0; m < r; ++m) { | |
2419 | if (m < nr) { | |
2420 | c = temp[m]; | |
2421 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2422 | } else | |
2423 | putchar(' '); | |
2424 | } | |
2425 | n -= r; | |
2426 | for (; m < 16; ++m) | |
2427 | putchar(' '); | |
2428 | printf("|\n"); | |
2429 | if (nr < r) | |
2430 | break; | |
2431 | } | |
2432 | } | |
2433 | ||
4c4c8723 ME |
2434 | typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
2435 | ||
9f1067c2 | 2436 | static int |
4c4c8723 ME |
2437 | generic_inst_dump(unsigned long adr, long count, int praddr, |
2438 | instruction_dump_func dump_func) | |
1da177e4 LT |
2439 | { |
2440 | int nr, dotted; | |
2441 | unsigned long first_adr; | |
2442 | unsigned long inst, last_inst = 0; | |
2443 | unsigned char val[4]; | |
2444 | ||
2445 | dotted = 0; | |
2446 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2447 | nr = mread(adr, val, 4); | |
2448 | if (nr == 0) { | |
2449 | if (praddr) { | |
2450 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2451 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2452 | } |
2453 | break; | |
2454 | } | |
2455 | inst = GETWORD(val); | |
2456 | if (adr > first_adr && inst == last_inst) { | |
2457 | if (!dotted) { | |
2458 | printf(" ...\n"); | |
2459 | dotted = 1; | |
2460 | } | |
2461 | continue; | |
2462 | } | |
2463 | dotted = 0; | |
2464 | last_inst = inst; | |
2465 | if (praddr) | |
f78541dc | 2466 | printf(REG" %.8x", adr, inst); |
1da177e4 | 2467 | printf("\t"); |
4c4c8723 | 2468 | dump_func(inst, adr); |
1da177e4 LT |
2469 | printf("\n"); |
2470 | } | |
2471 | return adr - first_adr; | |
2472 | } | |
2473 | ||
9f1067c2 | 2474 | static int |
4c4c8723 ME |
2475 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
2476 | { | |
2477 | return generic_inst_dump(adr, count, praddr, print_insn_powerpc); | |
2478 | } | |
2479 | ||
1da177e4 LT |
2480 | void |
2481 | print_address(unsigned long addr) | |
2482 | { | |
2483 | xmon_print_symbol(addr, "\t# ", ""); | |
2484 | } | |
2485 | ||
f312deb4 VS |
2486 | void |
2487 | dump_log_buf(void) | |
2488 | { | |
ca5dd395 ME |
2489 | struct kmsg_dumper dumper = { .active = 1 }; |
2490 | unsigned char buf[128]; | |
2491 | size_t len; | |
f312deb4 | 2492 | |
e3bc8049 | 2493 | if (setjmp(bus_error_jmp) != 0) { |
ca5dd395 | 2494 | printf("Error dumping printk buffer!\n"); |
e3bc8049 ME |
2495 | return; |
2496 | } | |
f312deb4 | 2497 | |
e3bc8049 ME |
2498 | catch_memory_errors = 1; |
2499 | sync(); | |
f312deb4 | 2500 | |
ca5dd395 | 2501 | kmsg_dump_rewind_nolock(&dumper); |
0c23a88c | 2502 | xmon_start_pagination(); |
ca5dd395 ME |
2503 | while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) { |
2504 | buf[len] = '\0'; | |
2505 | printf("%s", buf); | |
2506 | } | |
0c23a88c | 2507 | xmon_end_pagination(); |
f312deb4 | 2508 | |
e3bc8049 ME |
2509 | sync(); |
2510 | /* wait a little while to see if we get a machine check */ | |
2511 | __delay(200); | |
2512 | catch_memory_errors = 0; | |
f312deb4 | 2513 | } |
1da177e4 | 2514 | |
fde93a0f AD |
2515 | #ifdef CONFIG_PPC_POWERNV |
2516 | static void dump_opal_msglog(void) | |
2517 | { | |
2518 | unsigned char buf[128]; | |
2519 | ssize_t res; | |
2520 | loff_t pos = 0; | |
2521 | ||
2522 | if (!firmware_has_feature(FW_FEATURE_OPAL)) { | |
2523 | printf("Machine is not running OPAL firmware.\n"); | |
2524 | return; | |
2525 | } | |
2526 | ||
2527 | if (setjmp(bus_error_jmp) != 0) { | |
2528 | printf("Error dumping OPAL msglog!\n"); | |
2529 | return; | |
2530 | } | |
2531 | ||
2532 | catch_memory_errors = 1; | |
2533 | sync(); | |
2534 | ||
2535 | xmon_start_pagination(); | |
2536 | while ((res = opal_msglog_copy(buf, pos, sizeof(buf) - 1))) { | |
2537 | if (res < 0) { | |
2538 | printf("Error dumping OPAL msglog! Error: %zd\n", res); | |
2539 | break; | |
2540 | } | |
2541 | buf[res] = '\0'; | |
2542 | printf("%s", buf); | |
2543 | pos += res; | |
2544 | } | |
2545 | xmon_end_pagination(); | |
2546 | ||
2547 | sync(); | |
2548 | /* wait a little while to see if we get a machine check */ | |
2549 | __delay(200); | |
2550 | catch_memory_errors = 0; | |
2551 | } | |
2552 | #endif | |
2553 | ||
1da177e4 LT |
2554 | /* |
2555 | * Memory operations - move, set, print differences | |
2556 | */ | |
2557 | static unsigned long mdest; /* destination address */ | |
2558 | static unsigned long msrc; /* source address */ | |
2559 | static unsigned long mval; /* byte value to set memory to */ | |
2560 | static unsigned long mcount; /* # bytes to affect */ | |
2561 | static unsigned long mdiffs; /* max # differences to print */ | |
2562 | ||
9f1067c2 | 2563 | static void |
1da177e4 LT |
2564 | memops(int cmd) |
2565 | { | |
2566 | scanhex((void *)&mdest); | |
2567 | if( termch != '\n' ) | |
2568 | termch = 0; | |
2569 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2570 | if( termch != '\n' ) | |
2571 | termch = 0; | |
2572 | scanhex((void *)&mcount); | |
2573 | switch( cmd ){ | |
2574 | case 'm': | |
2575 | memmove((void *)mdest, (void *)msrc, mcount); | |
2576 | break; | |
2577 | case 's': | |
2578 | memset((void *)mdest, mval, mcount); | |
2579 | break; | |
2580 | case 'd': | |
2581 | if( termch != '\n' ) | |
2582 | termch = 0; | |
2583 | scanhex((void *)&mdiffs); | |
2584 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2585 | break; | |
2586 | } | |
2587 | } | |
2588 | ||
9f1067c2 | 2589 | static void |
1da177e4 LT |
2590 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
2591 | { | |
2592 | unsigned n, prt; | |
2593 | ||
2594 | prt = 0; | |
2595 | for( n = nb; n > 0; --n ) | |
2596 | if( *p1++ != *p2++ ) | |
2597 | if( ++prt <= maxpr ) | |
2598 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2599 | p1[-1], p2 - 1, p2[-1]); | |
2600 | if( prt > maxpr ) | |
2601 | printf("Total of %d differences\n", prt); | |
2602 | } | |
2603 | ||
2604 | static unsigned mend; | |
2605 | static unsigned mask; | |
2606 | ||
9f1067c2 | 2607 | static void |
1da177e4 LT |
2608 | memlocate(void) |
2609 | { | |
2610 | unsigned a, n; | |
2611 | unsigned char val[4]; | |
2612 | ||
2613 | last_cmd = "ml"; | |
2614 | scanhex((void *)&mdest); | |
2615 | if (termch != '\n') { | |
2616 | termch = 0; | |
2617 | scanhex((void *)&mend); | |
2618 | if (termch != '\n') { | |
2619 | termch = 0; | |
2620 | scanhex((void *)&mval); | |
2621 | mask = ~0; | |
2622 | if (termch != '\n') termch = 0; | |
2623 | scanhex((void *)&mask); | |
2624 | } | |
2625 | } | |
2626 | n = 0; | |
2627 | for (a = mdest; a < mend; a += 4) { | |
2628 | if (mread(a, val, 4) == 4 | |
2629 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2630 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2631 | if (++n >= 10) | |
2632 | break; | |
2633 | } | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | static unsigned long mskip = 0x1000; | |
2638 | static unsigned long mlim = 0xffffffff; | |
2639 | ||
9f1067c2 | 2640 | static void |
1da177e4 LT |
2641 | memzcan(void) |
2642 | { | |
2643 | unsigned char v; | |
2644 | unsigned a; | |
2645 | int ok, ook; | |
2646 | ||
2647 | scanhex(&mdest); | |
2648 | if (termch != '\n') termch = 0; | |
2649 | scanhex(&mskip); | |
2650 | if (termch != '\n') termch = 0; | |
2651 | scanhex(&mlim); | |
2652 | ook = 0; | |
2653 | for (a = mdest; a < mlim; a += mskip) { | |
2654 | ok = mread(a, &v, 1); | |
2655 | if (ok && !ook) { | |
2656 | printf("%.8x .. ", a); | |
1da177e4 LT |
2657 | } else if (!ok && ook) |
2658 | printf("%.8x\n", a - mskip); | |
2659 | ook = ok; | |
2660 | if (a + mskip < a) | |
2661 | break; | |
2662 | } | |
2663 | if (ook) | |
2664 | printf("%.8x\n", a - mskip); | |
2665 | } | |
2666 | ||
6dfb5404 DM |
2667 | static void show_task(struct task_struct *tsk) |
2668 | { | |
2669 | char state; | |
2670 | ||
2671 | /* | |
2672 | * Cloned from kdb_task_state_char(), which is not entirely | |
2673 | * appropriate for calling from xmon. This could be moved | |
2674 | * to a common, generic, routine used by both. | |
2675 | */ | |
2676 | state = (tsk->state == 0) ? 'R' : | |
2677 | (tsk->state < 0) ? 'U' : | |
2678 | (tsk->state & TASK_UNINTERRUPTIBLE) ? 'D' : | |
2679 | (tsk->state & TASK_STOPPED) ? 'T' : | |
2680 | (tsk->state & TASK_TRACED) ? 'C' : | |
2681 | (tsk->exit_state & EXIT_ZOMBIE) ? 'Z' : | |
2682 | (tsk->exit_state & EXIT_DEAD) ? 'E' : | |
2683 | (tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?'; | |
2684 | ||
2685 | printf("%p %016lx %6d %6d %c %2d %s\n", tsk, | |
2686 | tsk->thread.ksp, | |
2687 | tsk->pid, tsk->parent->pid, | |
2688 | state, task_thread_info(tsk)->cpu, | |
2689 | tsk->comm); | |
2690 | } | |
2691 | ||
2692 | static void show_tasks(void) | |
2693 | { | |
2694 | unsigned long tskv; | |
2695 | struct task_struct *tsk = NULL; | |
2696 | ||
2697 | printf(" task_struct ->thread.ksp PID PPID S P CMD\n"); | |
2698 | ||
2699 | if (scanhex(&tskv)) | |
2700 | tsk = (struct task_struct *)tskv; | |
2701 | ||
2702 | if (setjmp(bus_error_jmp) != 0) { | |
2703 | catch_memory_errors = 0; | |
2704 | printf("*** Error dumping task %p\n", tsk); | |
2705 | return; | |
2706 | } | |
2707 | ||
2708 | catch_memory_errors = 1; | |
2709 | sync(); | |
2710 | ||
2711 | if (tsk) | |
2712 | show_task(tsk); | |
2713 | else | |
2714 | for_each_process(tsk) | |
2715 | show_task(tsk); | |
2716 | ||
2717 | sync(); | |
2718 | __delay(200); | |
2719 | catch_memory_errors = 0; | |
2720 | } | |
2721 | ||
9f1067c2 | 2722 | static void proccall(void) |
f78541dc PM |
2723 | { |
2724 | unsigned long args[8]; | |
2725 | unsigned long ret; | |
2726 | int i; | |
2727 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2728 | unsigned long, unsigned long, unsigned long, | |
2729 | unsigned long, unsigned long, unsigned long); | |
2730 | callfunc_t func; | |
2731 | ||
2732 | if (!scanhex(&adrs)) | |
2733 | return; | |
2734 | if (termch != '\n') | |
2735 | termch = 0; | |
2736 | for (i = 0; i < 8; ++i) | |
2737 | args[i] = 0; | |
2738 | for (i = 0; i < 8; ++i) { | |
2739 | if (!scanhex(&args[i]) || termch == '\n') | |
2740 | break; | |
2741 | termch = 0; | |
2742 | } | |
2743 | func = (callfunc_t) adrs; | |
2744 | ret = 0; | |
2745 | if (setjmp(bus_error_jmp) == 0) { | |
2746 | catch_memory_errors = 1; | |
2747 | sync(); | |
2748 | ret = func(args[0], args[1], args[2], args[3], | |
2749 | args[4], args[5], args[6], args[7]); | |
2750 | sync(); | |
736256e4 | 2751 | printf("return value is 0x%lx\n", ret); |
f78541dc PM |
2752 | } else { |
2753 | printf("*** %x exception occurred\n", fault_except); | |
2754 | } | |
2755 | catch_memory_errors = 0; | |
2756 | } | |
2757 | ||
1da177e4 LT |
2758 | /* Input scanning routines */ |
2759 | int | |
2760 | skipbl(void) | |
2761 | { | |
2762 | int c; | |
2763 | ||
2764 | if( termch != 0 ){ | |
2765 | c = termch; | |
2766 | termch = 0; | |
2767 | } else | |
2768 | c = inchar(); | |
2769 | while( c == ' ' || c == '\t' ) | |
2770 | c = inchar(); | |
2771 | return c; | |
2772 | } | |
2773 | ||
2774 | #define N_PTREGS 44 | |
2775 | static char *regnames[N_PTREGS] = { | |
2776 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2777 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2778 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2779 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2780 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2781 | #ifdef CONFIG_PPC64 | |
2782 | "softe", | |
2783 | #else | |
2784 | "mq", | |
2785 | #endif | |
1da177e4 LT |
2786 | "trap", "dar", "dsisr", "res" |
2787 | }; | |
2788 | ||
2789 | int | |
2790 | scanhex(unsigned long *vp) | |
2791 | { | |
2792 | int c, d; | |
2793 | unsigned long v; | |
2794 | ||
2795 | c = skipbl(); | |
2796 | if (c == '%') { | |
2797 | /* parse register name */ | |
2798 | char regname[8]; | |
2799 | int i; | |
2800 | ||
2801 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2802 | c = inchar(); | |
2803 | if (!isalnum(c)) { | |
2804 | termch = c; | |
2805 | break; | |
2806 | } | |
2807 | regname[i] = c; | |
2808 | } | |
2809 | regname[i] = 0; | |
2810 | for (i = 0; i < N_PTREGS; ++i) { | |
2811 | if (strcmp(regnames[i], regname) == 0) { | |
2812 | if (xmon_regs == NULL) { | |
2813 | printf("regs not available\n"); | |
2814 | return 0; | |
2815 | } | |
2816 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2817 | return 1; | |
2818 | } | |
2819 | } | |
2820 | printf("invalid register name '%%%s'\n", regname); | |
2821 | return 0; | |
2822 | } | |
2823 | ||
2824 | /* skip leading "0x" if any */ | |
2825 | ||
2826 | if (c == '0') { | |
2827 | c = inchar(); | |
2828 | if (c == 'x') { | |
2829 | c = inchar(); | |
2830 | } else { | |
2831 | d = hexdigit(c); | |
2832 | if (d == EOF) { | |
2833 | termch = c; | |
2834 | *vp = 0; | |
2835 | return 1; | |
2836 | } | |
2837 | } | |
2838 | } else if (c == '$') { | |
2839 | int i; | |
2840 | for (i=0; i<63; i++) { | |
2841 | c = inchar(); | |
05b981f4 | 2842 | if (isspace(c) || c == '\0') { |
1da177e4 LT |
2843 | termch = c; |
2844 | break; | |
2845 | } | |
2846 | tmpstr[i] = c; | |
2847 | } | |
2848 | tmpstr[i++] = 0; | |
6879dc13 BH |
2849 | *vp = 0; |
2850 | if (setjmp(bus_error_jmp) == 0) { | |
2851 | catch_memory_errors = 1; | |
2852 | sync(); | |
2853 | *vp = kallsyms_lookup_name(tmpstr); | |
2854 | sync(); | |
2855 | } | |
2856 | catch_memory_errors = 0; | |
1da177e4 LT |
2857 | if (!(*vp)) { |
2858 | printf("unknown symbol '%s'\n", tmpstr); | |
2859 | return 0; | |
2860 | } | |
2861 | return 1; | |
2862 | } | |
2863 | ||
2864 | d = hexdigit(c); | |
2865 | if (d == EOF) { | |
2866 | termch = c; | |
2867 | return 0; | |
2868 | } | |
2869 | v = 0; | |
2870 | do { | |
2871 | v = (v << 4) + d; | |
2872 | c = inchar(); | |
2873 | d = hexdigit(c); | |
2874 | } while (d != EOF); | |
2875 | termch = c; | |
2876 | *vp = v; | |
2877 | return 1; | |
2878 | } | |
2879 | ||
9f1067c2 | 2880 | static void |
1da177e4 LT |
2881 | scannl(void) |
2882 | { | |
2883 | int c; | |
2884 | ||
2885 | c = termch; | |
2886 | termch = 0; | |
2887 | while( c != '\n' ) | |
2888 | c = inchar(); | |
2889 | } | |
2890 | ||
9f1067c2 | 2891 | static int hexdigit(int c) |
1da177e4 LT |
2892 | { |
2893 | if( '0' <= c && c <= '9' ) | |
2894 | return c - '0'; | |
2895 | if( 'A' <= c && c <= 'F' ) | |
2896 | return c - ('A' - 10); | |
2897 | if( 'a' <= c && c <= 'f' ) | |
2898 | return c - ('a' - 10); | |
2899 | return EOF; | |
2900 | } | |
2901 | ||
2902 | void | |
2903 | getstring(char *s, int size) | |
2904 | { | |
2905 | int c; | |
2906 | ||
2907 | c = skipbl(); | |
2908 | do { | |
2909 | if( size > 1 ){ | |
2910 | *s++ = c; | |
2911 | --size; | |
2912 | } | |
2913 | c = inchar(); | |
2914 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2915 | termch = c; | |
2916 | *s = 0; | |
2917 | } | |
2918 | ||
2919 | static char line[256]; | |
2920 | static char *lineptr; | |
2921 | ||
9f1067c2 | 2922 | static void |
1da177e4 LT |
2923 | flush_input(void) |
2924 | { | |
2925 | lineptr = NULL; | |
2926 | } | |
2927 | ||
9f1067c2 | 2928 | static int |
1da177e4 LT |
2929 | inchar(void) |
2930 | { | |
2931 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2932 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2933 | lineptr = NULL; |
2934 | return EOF; | |
2935 | } | |
2936 | lineptr = line; | |
2937 | } | |
2938 | return *lineptr++; | |
2939 | } | |
2940 | ||
9f1067c2 | 2941 | static void |
1da177e4 LT |
2942 | take_input(char *str) |
2943 | { | |
2944 | lineptr = str; | |
2945 | } | |
2946 | ||
2947 | ||
2948 | static void | |
2949 | symbol_lookup(void) | |
2950 | { | |
2951 | int type = inchar(); | |
2952 | unsigned long addr; | |
2953 | static char tmp[64]; | |
2954 | ||
2955 | switch (type) { | |
2956 | case 'a': | |
2957 | if (scanhex(&addr)) | |
2958 | xmon_print_symbol(addr, ": ", "\n"); | |
2959 | termch = 0; | |
2960 | break; | |
2961 | case 's': | |
2962 | getstring(tmp, 64); | |
2963 | if (setjmp(bus_error_jmp) == 0) { | |
2964 | catch_memory_errors = 1; | |
2965 | sync(); | |
2966 | addr = kallsyms_lookup_name(tmp); | |
2967 | if (addr) | |
2968 | printf("%s: %lx\n", tmp, addr); | |
2969 | else | |
2970 | printf("Symbol '%s' not found.\n", tmp); | |
2971 | sync(); | |
2972 | } | |
2973 | catch_memory_errors = 0; | |
2974 | termch = 0; | |
2975 | break; | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | ||
2980 | /* Print an address in numeric and symbolic form (if possible) */ | |
2981 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2982 | const char *after) | |
2983 | { | |
2984 | char *modname; | |
2985 | const char *name = NULL; | |
2986 | unsigned long offset, size; | |
2987 | ||
f78541dc | 2988 | printf(REG, address); |
1da177e4 LT |
2989 | if (setjmp(bus_error_jmp) == 0) { |
2990 | catch_memory_errors = 1; | |
2991 | sync(); | |
2992 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2993 | tmpstr); | |
2994 | sync(); | |
2995 | /* wait a little while to see if we get a machine check */ | |
2996 | __delay(200); | |
2997 | } | |
2998 | ||
2999 | catch_memory_errors = 0; | |
3000 | ||
3001 | if (name) { | |
3002 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
3003 | if (modname) | |
3004 | printf(" [%s]", modname); | |
3005 | } | |
3006 | printf("%s", after); | |
3007 | } | |
3008 | ||
caca285e | 3009 | #ifdef CONFIG_PPC_STD_MMU_64 |
13b3d13b | 3010 | void dump_segments(void) |
1da177e4 LT |
3011 | { |
3012 | int i; | |
8218a303 | 3013 | unsigned long esid,vsid; |
b3b9595f | 3014 | unsigned long llp; |
1da177e4 | 3015 | |
736256e4 | 3016 | printf("SLB contents of cpu 0x%x\n", smp_processor_id()); |
1da177e4 | 3017 | |
584f8b71 | 3018 | for (i = 0; i < mmu_slb_size; i++) { |
b3b9595f | 3019 | asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
3020 | asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); | |
8218a303 | 3021 | if (esid || vsid) { |
b3b9595f | 3022 | printf("%02d %016lx %016lx", i, esid, vsid); |
8218a303 | 3023 | if (esid & SLB_ESID_V) { |
b3b9595f | 3024 | llp = vsid & SLB_VSID_LLP; |
3025 | if (vsid & SLB_VSID_B_1T) { | |
3026 | printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
3027 | GET_ESID_1T(esid), | |
3028 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, | |
3029 | llp); | |
3030 | } else { | |
3031 | printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
3032 | GET_ESID(esid), | |
3033 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, | |
3034 | llp); | |
3035 | } | |
3036 | } else | |
3037 | printf("\n"); | |
3038 | } | |
1da177e4 LT |
3039 | } |
3040 | } | |
f78541dc PM |
3041 | #endif |
3042 | ||
3043 | #ifdef CONFIG_PPC_STD_MMU_32 | |
3044 | void dump_segments(void) | |
3045 | { | |
3046 | int i; | |
3047 | ||
3048 | printf("sr0-15 ="); | |
3049 | for (i = 0; i < 16; ++i) | |
3050 | printf(" %x", mfsrin(i)); | |
3051 | printf("\n"); | |
3052 | } | |
3053 | #endif | |
3054 | ||
5a8a1a28 BH |
3055 | #ifdef CONFIG_44x |
3056 | static void dump_tlb_44x(void) | |
3057 | { | |
3058 | int i; | |
3059 | ||
3060 | for (i = 0; i < PPC44x_TLB_SIZE; i++) { | |
3061 | unsigned long w0,w1,w2; | |
3062 | asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); | |
3063 | asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); | |
3064 | asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); | |
3065 | printf("[%02x] %08x %08x %08x ", i, w0, w1, w2); | |
3066 | if (w0 & PPC44x_TLB_VALID) { | |
3067 | printf("V %08x -> %01x%08x %c%c%c%c%c", | |
3068 | w0 & PPC44x_TLB_EPN_MASK, | |
3069 | w1 & PPC44x_TLB_ERPN_MASK, | |
3070 | w1 & PPC44x_TLB_RPN_MASK, | |
3071 | (w2 & PPC44x_TLB_W) ? 'W' : 'w', | |
3072 | (w2 & PPC44x_TLB_I) ? 'I' : 'i', | |
3073 | (w2 & PPC44x_TLB_M) ? 'M' : 'm', | |
3074 | (w2 & PPC44x_TLB_G) ? 'G' : 'g', | |
3075 | (w2 & PPC44x_TLB_E) ? 'E' : 'e'); | |
3076 | } | |
3077 | printf("\n"); | |
3078 | } | |
3079 | } | |
3080 | #endif /* CONFIG_44x */ | |
9f1067c2 | 3081 | |
03247157 BH |
3082 | #ifdef CONFIG_PPC_BOOK3E |
3083 | static void dump_tlb_book3e(void) | |
3084 | { | |
3085 | u32 mmucfg, pidmask, lpidmask; | |
3086 | u64 ramask; | |
3087 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | |
3088 | int mmu_version; | |
3089 | static const char *pgsz_names[] = { | |
3090 | " 1K", | |
3091 | " 2K", | |
3092 | " 4K", | |
3093 | " 8K", | |
3094 | " 16K", | |
3095 | " 32K", | |
3096 | " 64K", | |
3097 | "128K", | |
3098 | "256K", | |
3099 | "512K", | |
3100 | " 1M", | |
3101 | " 2M", | |
3102 | " 4M", | |
3103 | " 8M", | |
3104 | " 16M", | |
3105 | " 32M", | |
3106 | " 64M", | |
3107 | "128M", | |
3108 | "256M", | |
3109 | "512M", | |
3110 | " 1G", | |
3111 | " 2G", | |
3112 | " 4G", | |
3113 | " 8G", | |
3114 | " 16G", | |
3115 | " 32G", | |
3116 | " 64G", | |
3117 | "128G", | |
3118 | "256G", | |
3119 | "512G", | |
3120 | " 1T", | |
3121 | " 2T", | |
3122 | }; | |
3123 | ||
3124 | /* Gather some infos about the MMU */ | |
3125 | mmucfg = mfspr(SPRN_MMUCFG); | |
3126 | mmu_version = (mmucfg & 3) + 1; | |
3127 | ntlbs = ((mmucfg >> 2) & 3) + 1; | |
3128 | pidsz = ((mmucfg >> 6) & 0x1f) + 1; | |
3129 | lpidsz = (mmucfg >> 24) & 0xf; | |
3130 | rasz = (mmucfg >> 16) & 0x7f; | |
3131 | if ((mmu_version > 1) && (mmucfg & 0x10000)) | |
3132 | lrat = 1; | |
3133 | printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", | |
3134 | mmu_version, ntlbs, pidsz, lpidsz, rasz); | |
3135 | pidmask = (1ul << pidsz) - 1; | |
3136 | lpidmask = (1ul << lpidsz) - 1; | |
3137 | ramask = (1ull << rasz) - 1; | |
3138 | ||
3139 | for (tlb = 0; tlb < ntlbs; tlb++) { | |
3140 | u32 tlbcfg; | |
3141 | int nent, assoc, new_cc = 1; | |
3142 | printf("TLB %d:\n------\n", tlb); | |
3143 | switch(tlb) { | |
3144 | case 0: | |
3145 | tlbcfg = mfspr(SPRN_TLB0CFG); | |
3146 | break; | |
3147 | case 1: | |
3148 | tlbcfg = mfspr(SPRN_TLB1CFG); | |
3149 | break; | |
3150 | case 2: | |
3151 | tlbcfg = mfspr(SPRN_TLB2CFG); | |
3152 | break; | |
3153 | case 3: | |
3154 | tlbcfg = mfspr(SPRN_TLB3CFG); | |
3155 | break; | |
3156 | default: | |
3157 | printf("Unsupported TLB number !\n"); | |
3158 | continue; | |
3159 | } | |
3160 | nent = tlbcfg & 0xfff; | |
3161 | assoc = (tlbcfg >> 24) & 0xff; | |
3162 | for (i = 0; i < nent; i++) { | |
3163 | u32 mas0 = MAS0_TLBSEL(tlb); | |
3164 | u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); | |
3165 | u64 mas2 = 0; | |
3166 | u64 mas7_mas3; | |
3167 | int esel = i, cc = i; | |
3168 | ||
3169 | if (assoc != 0) { | |
3170 | cc = i / assoc; | |
3171 | esel = i % assoc; | |
3172 | mas2 = cc * 0x1000; | |
3173 | } | |
3174 | ||
3175 | mas0 |= MAS0_ESEL(esel); | |
3176 | mtspr(SPRN_MAS0, mas0); | |
3177 | mtspr(SPRN_MAS1, mas1); | |
3178 | mtspr(SPRN_MAS2, mas2); | |
3179 | asm volatile("tlbre 0,0,0" : : : "memory"); | |
3180 | mas1 = mfspr(SPRN_MAS1); | |
3181 | mas2 = mfspr(SPRN_MAS2); | |
3182 | mas7_mas3 = mfspr(SPRN_MAS7_MAS3); | |
3183 | if (assoc && (i % assoc) == 0) | |
3184 | new_cc = 1; | |
3185 | if (!(mas1 & MAS1_VALID)) | |
3186 | continue; | |
3187 | if (assoc == 0) | |
3188 | printf("%04x- ", i); | |
3189 | else if (new_cc) | |
3190 | printf("%04x-%c", cc, 'A' + esel); | |
3191 | else | |
3192 | printf(" |%c", 'A' + esel); | |
3193 | new_cc = 0; | |
3194 | printf(" %016llx %04x %s %c%c AS%c", | |
3195 | mas2 & ~0x3ffull, | |
3196 | (mas1 >> 16) & 0x3fff, | |
3197 | pgsz_names[(mas1 >> 7) & 0x1f], | |
3198 | mas1 & MAS1_IND ? 'I' : ' ', | |
3199 | mas1 & MAS1_IPROT ? 'P' : ' ', | |
3200 | mas1 & MAS1_TS ? '1' : '0'); | |
3201 | printf(" %c%c%c%c%c%c%c", | |
3202 | mas2 & MAS2_X0 ? 'a' : ' ', | |
3203 | mas2 & MAS2_X1 ? 'v' : ' ', | |
3204 | mas2 & MAS2_W ? 'w' : ' ', | |
3205 | mas2 & MAS2_I ? 'i' : ' ', | |
3206 | mas2 & MAS2_M ? 'm' : ' ', | |
3207 | mas2 & MAS2_G ? 'g' : ' ', | |
3208 | mas2 & MAS2_E ? 'e' : ' '); | |
3209 | printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); | |
3210 | if (mas1 & MAS1_IND) | |
3211 | printf(" %s\n", | |
3212 | pgsz_names[(mas7_mas3 >> 1) & 0x1f]); | |
3213 | else | |
3214 | printf(" U%c%c%c S%c%c%c\n", | |
3215 | mas7_mas3 & MAS3_UX ? 'x' : ' ', | |
3216 | mas7_mas3 & MAS3_UW ? 'w' : ' ', | |
3217 | mas7_mas3 & MAS3_UR ? 'r' : ' ', | |
3218 | mas7_mas3 & MAS3_SX ? 'x' : ' ', | |
3219 | mas7_mas3 & MAS3_SW ? 'w' : ' ', | |
3220 | mas7_mas3 & MAS3_SR ? 'r' : ' '); | |
3221 | } | |
3222 | } | |
3223 | } | |
3224 | #endif /* CONFIG_PPC_BOOK3E */ | |
3225 | ||
9f1067c2 | 3226 | static void xmon_init(int enable) |
b13cfd17 OH |
3227 | { |
3228 | if (enable) { | |
3229 | __debugger = xmon; | |
3230 | __debugger_ipi = xmon_ipi; | |
3231 | __debugger_bpt = xmon_bpt; | |
3232 | __debugger_sstep = xmon_sstep; | |
3233 | __debugger_iabr_match = xmon_iabr_match; | |
9422de3e | 3234 | __debugger_break_match = xmon_break_match; |
b13cfd17 OH |
3235 | __debugger_fault_handler = xmon_fault_handler; |
3236 | } else { | |
3237 | __debugger = NULL; | |
3238 | __debugger_ipi = NULL; | |
3239 | __debugger_bpt = NULL; | |
3240 | __debugger_sstep = NULL; | |
3241 | __debugger_iabr_match = NULL; | |
9422de3e | 3242 | __debugger_break_match = NULL; |
b13cfd17 OH |
3243 | __debugger_fault_handler = NULL; |
3244 | } | |
1da177e4 | 3245 | } |
fca5dcd4 PM |
3246 | |
3247 | #ifdef CONFIG_MAGIC_SYSRQ | |
1495cc9d | 3248 | static void sysrq_handle_xmon(int key) |
fca5dcd4 PM |
3249 | { |
3250 | /* ensure xmon is enabled */ | |
3251 | xmon_init(1); | |
7d12e780 | 3252 | debugger(get_irq_regs()); |
fca5dcd4 PM |
3253 | } |
3254 | ||
1495cc9d | 3255 | static struct sysrq_key_op sysrq_xmon_op = { |
fca5dcd4 | 3256 | .handler = sysrq_handle_xmon, |
90a102e5 | 3257 | .help_msg = "xmon(x)", |
fca5dcd4 PM |
3258 | .action_msg = "Entering xmon", |
3259 | }; | |
3260 | ||
3261 | static int __init setup_xmon_sysrq(void) | |
3262 | { | |
3263 | register_sysrq_key('x', &sysrq_xmon_op); | |
3264 | return 0; | |
3265 | } | |
3266 | __initcall(setup_xmon_sysrq); | |
3267 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
47679283 | 3268 | |
f5e6a280 | 3269 | static int __initdata xmon_early, xmon_off; |
47679283 ME |
3270 | |
3271 | static int __init early_parse_xmon(char *p) | |
3272 | { | |
3273 | if (!p || strncmp(p, "early", 5) == 0) { | |
3274 | /* just "xmon" is equivalent to "xmon=early" */ | |
3275 | xmon_init(1); | |
3276 | xmon_early = 1; | |
3277 | } else if (strncmp(p, "on", 2) == 0) | |
3278 | xmon_init(1); | |
3279 | else if (strncmp(p, "off", 3) == 0) | |
3280 | xmon_off = 1; | |
3281 | else if (strncmp(p, "nobt", 4) == 0) | |
3282 | xmon_no_auto_backtrace = 1; | |
3283 | else | |
3284 | return 1; | |
3285 | ||
3286 | return 0; | |
3287 | } | |
3288 | early_param("xmon", early_parse_xmon); | |
3289 | ||
3290 | void __init xmon_setup(void) | |
3291 | { | |
3292 | #ifdef CONFIG_XMON_DEFAULT | |
3293 | if (!xmon_off) | |
3294 | xmon_init(1); | |
3295 | #endif | |
3296 | if (xmon_early) | |
3297 | debugger(NULL); | |
3298 | } | |
ff8a8f25 | 3299 | |
e055595d | 3300 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 ME |
3301 | |
3302 | struct spu_info { | |
3303 | struct spu *spu; | |
3304 | u64 saved_mfc_sr1_RW; | |
3305 | u32 saved_spu_runcntl_RW; | |
24a24c85 | 3306 | unsigned long dump_addr; |
ff8a8f25 ME |
3307 | u8 stopped_ok; |
3308 | }; | |
3309 | ||
3310 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ | |
3311 | ||
3312 | static struct spu_info spu_info[XMON_NUM_SPUS]; | |
3313 | ||
3314 | void xmon_register_spus(struct list_head *list) | |
3315 | { | |
3316 | struct spu *spu; | |
3317 | ||
3318 | list_for_each_entry(spu, list, full_list) { | |
3319 | if (spu->number >= XMON_NUM_SPUS) { | |
3320 | WARN_ON(1); | |
3321 | continue; | |
3322 | } | |
3323 | ||
3324 | spu_info[spu->number].spu = spu; | |
3325 | spu_info[spu->number].stopped_ok = 0; | |
24a24c85 ME |
3326 | spu_info[spu->number].dump_addr = (unsigned long) |
3327 | spu_info[spu->number].spu->local_store; | |
ff8a8f25 ME |
3328 | } |
3329 | } | |
3330 | ||
3331 | static void stop_spus(void) | |
3332 | { | |
3333 | struct spu *spu; | |
3334 | int i; | |
3335 | u64 tmp; | |
3336 | ||
3337 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3338 | if (!spu_info[i].spu) | |
3339 | continue; | |
3340 | ||
3341 | if (setjmp(bus_error_jmp) == 0) { | |
3342 | catch_memory_errors = 1; | |
3343 | sync(); | |
3344 | ||
3345 | spu = spu_info[i].spu; | |
3346 | ||
3347 | spu_info[i].saved_spu_runcntl_RW = | |
3348 | in_be32(&spu->problem->spu_runcntl_RW); | |
3349 | ||
3350 | tmp = spu_mfc_sr1_get(spu); | |
3351 | spu_info[i].saved_mfc_sr1_RW = tmp; | |
3352 | ||
3353 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; | |
3354 | spu_mfc_sr1_set(spu, tmp); | |
3355 | ||
3356 | sync(); | |
3357 | __delay(200); | |
3358 | ||
3359 | spu_info[i].stopped_ok = 1; | |
2a14442b ME |
3360 | |
3361 | printf("Stopped spu %.2d (was %s)\n", i, | |
3362 | spu_info[i].saved_spu_runcntl_RW ? | |
3363 | "running" : "stopped"); | |
ff8a8f25 ME |
3364 | } else { |
3365 | catch_memory_errors = 0; | |
3366 | printf("*** Error stopping spu %.2d\n", i); | |
3367 | } | |
3368 | catch_memory_errors = 0; | |
3369 | } | |
3370 | } | |
3371 | ||
3372 | static void restart_spus(void) | |
3373 | { | |
3374 | struct spu *spu; | |
3375 | int i; | |
3376 | ||
3377 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3378 | if (!spu_info[i].spu) | |
3379 | continue; | |
3380 | ||
3381 | if (!spu_info[i].stopped_ok) { | |
3382 | printf("*** Error, spu %d was not successfully stopped" | |
3383 | ", not restarting\n", i); | |
3384 | continue; | |
3385 | } | |
3386 | ||
3387 | if (setjmp(bus_error_jmp) == 0) { | |
3388 | catch_memory_errors = 1; | |
3389 | sync(); | |
3390 | ||
3391 | spu = spu_info[i].spu; | |
3392 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); | |
3393 | out_be32(&spu->problem->spu_runcntl_RW, | |
3394 | spu_info[i].saved_spu_runcntl_RW); | |
3395 | ||
3396 | sync(); | |
3397 | __delay(200); | |
3398 | ||
3399 | printf("Restarted spu %.2d\n", i); | |
3400 | } else { | |
3401 | catch_memory_errors = 0; | |
3402 | printf("*** Error restarting spu %.2d\n", i); | |
3403 | } | |
3404 | catch_memory_errors = 0; | |
3405 | } | |
3406 | } | |
3407 | ||
a8984970 | 3408 | #define DUMP_WIDTH 23 |
437a0706 | 3409 | #define DUMP_VALUE(format, field, value) \ |
a8984970 ME |
3410 | do { \ |
3411 | if (setjmp(bus_error_jmp) == 0) { \ | |
3412 | catch_memory_errors = 1; \ | |
3413 | sync(); \ | |
3414 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ | |
437a0706 | 3415 | #field, value); \ |
a8984970 ME |
3416 | sync(); \ |
3417 | __delay(200); \ | |
3418 | } else { \ | |
3419 | catch_memory_errors = 0; \ | |
3420 | printf(" %-*s = *** Error reading field.\n", \ | |
3421 | DUMP_WIDTH, #field); \ | |
3422 | } \ | |
3423 | catch_memory_errors = 0; \ | |
3424 | } while (0) | |
3425 | ||
437a0706 ME |
3426 | #define DUMP_FIELD(obj, format, field) \ |
3427 | DUMP_VALUE(format, field, obj->field) | |
3428 | ||
a8984970 ME |
3429 | static void dump_spu_fields(struct spu *spu) |
3430 | { | |
3431 | printf("Dumping spu fields at address %p:\n", spu); | |
3432 | ||
3433 | DUMP_FIELD(spu, "0x%x", number); | |
3434 | DUMP_FIELD(spu, "%s", name); | |
a8984970 ME |
3435 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
3436 | DUMP_FIELD(spu, "0x%p", local_store); | |
3437 | DUMP_FIELD(spu, "0x%lx", ls_size); | |
3438 | DUMP_FIELD(spu, "0x%x", node); | |
3439 | DUMP_FIELD(spu, "0x%lx", flags); | |
a8984970 | 3440 | DUMP_FIELD(spu, "%d", class_0_pending); |
f3d69e05 | 3441 | DUMP_FIELD(spu, "0x%lx", class_0_dar); |
f3d69e05 LB |
3442 | DUMP_FIELD(spu, "0x%lx", class_1_dar); |
3443 | DUMP_FIELD(spu, "0x%lx", class_1_dsisr); | |
a8984970 ME |
3444 | DUMP_FIELD(spu, "0x%lx", irqs[0]); |
3445 | DUMP_FIELD(spu, "0x%lx", irqs[1]); | |
3446 | DUMP_FIELD(spu, "0x%lx", irqs[2]); | |
3447 | DUMP_FIELD(spu, "0x%x", slb_replace); | |
3448 | DUMP_FIELD(spu, "%d", pid); | |
a8984970 ME |
3449 | DUMP_FIELD(spu, "0x%p", mm); |
3450 | DUMP_FIELD(spu, "0x%p", ctx); | |
3451 | DUMP_FIELD(spu, "0x%p", rq); | |
3452 | DUMP_FIELD(spu, "0x%p", timestamp); | |
3453 | DUMP_FIELD(spu, "0x%lx", problem_phys); | |
3454 | DUMP_FIELD(spu, "0x%p", problem); | |
437a0706 ME |
3455 | DUMP_VALUE("0x%x", problem->spu_runcntl_RW, |
3456 | in_be32(&spu->problem->spu_runcntl_RW)); | |
3457 | DUMP_VALUE("0x%x", problem->spu_status_R, | |
3458 | in_be32(&spu->problem->spu_status_R)); | |
3459 | DUMP_VALUE("0x%x", problem->spu_npc_RW, | |
3460 | in_be32(&spu->problem->spu_npc_RW)); | |
a8984970 | 3461 | DUMP_FIELD(spu, "0x%p", priv2); |
a985239b | 3462 | DUMP_FIELD(spu, "0x%p", pdata); |
a8984970 ME |
3463 | } |
3464 | ||
af89fb80 ME |
3465 | int |
3466 | spu_inst_dump(unsigned long adr, long count, int praddr) | |
3467 | { | |
3468 | return generic_inst_dump(adr, count, praddr, print_insn_spu); | |
3469 | } | |
3470 | ||
3471 | static void dump_spu_ls(unsigned long num, int subcmd) | |
24a24c85 ME |
3472 | { |
3473 | unsigned long offset, addr, ls_addr; | |
3474 | ||
3475 | if (setjmp(bus_error_jmp) == 0) { | |
3476 | catch_memory_errors = 1; | |
3477 | sync(); | |
3478 | ls_addr = (unsigned long)spu_info[num].spu->local_store; | |
3479 | sync(); | |
3480 | __delay(200); | |
3481 | } else { | |
3482 | catch_memory_errors = 0; | |
3483 | printf("*** Error: accessing spu info for spu %d\n", num); | |
3484 | return; | |
3485 | } | |
3486 | catch_memory_errors = 0; | |
3487 | ||
3488 | if (scanhex(&offset)) | |
3489 | addr = ls_addr + offset; | |
3490 | else | |
3491 | addr = spu_info[num].dump_addr; | |
3492 | ||
3493 | if (addr >= ls_addr + LS_SIZE) { | |
3494 | printf("*** Error: address outside of local store\n"); | |
3495 | return; | |
3496 | } | |
3497 | ||
af89fb80 ME |
3498 | switch (subcmd) { |
3499 | case 'i': | |
3500 | addr += spu_inst_dump(addr, 16, 1); | |
3501 | last_cmd = "sdi\n"; | |
3502 | break; | |
3503 | default: | |
3504 | prdump(addr, 64); | |
3505 | addr += 64; | |
3506 | last_cmd = "sd\n"; | |
3507 | break; | |
3508 | } | |
24a24c85 ME |
3509 | |
3510 | spu_info[num].dump_addr = addr; | |
3511 | } | |
3512 | ||
ff8a8f25 ME |
3513 | static int do_spu_cmd(void) |
3514 | { | |
24a24c85 | 3515 | static unsigned long num = 0; |
af89fb80 | 3516 | int cmd, subcmd = 0; |
ff8a8f25 ME |
3517 | |
3518 | cmd = inchar(); | |
3519 | switch (cmd) { | |
3520 | case 's': | |
3521 | stop_spus(); | |
3522 | break; | |
3523 | case 'r': | |
3524 | restart_spus(); | |
3525 | break; | |
24a24c85 | 3526 | case 'd': |
af89fb80 ME |
3527 | subcmd = inchar(); |
3528 | if (isxdigit(subcmd) || subcmd == '\n') | |
3529 | termch = subcmd; | |
3530 | case 'f': | |
24a24c85 ME |
3531 | scanhex(&num); |
3532 | if (num >= XMON_NUM_SPUS || !spu_info[num].spu) { | |
a8984970 | 3533 | printf("*** Error: invalid spu number\n"); |
24a24c85 ME |
3534 | return 0; |
3535 | } | |
3536 | ||
3537 | switch (cmd) { | |
3538 | case 'f': | |
3539 | dump_spu_fields(spu_info[num].spu); | |
3540 | break; | |
3541 | default: | |
af89fb80 | 3542 | dump_spu_ls(num, subcmd); |
24a24c85 ME |
3543 | break; |
3544 | } | |
3545 | ||
a8984970 | 3546 | break; |
ff8a8f25 ME |
3547 | default: |
3548 | return -1; | |
3549 | } | |
3550 | ||
3551 | return 0; | |
3552 | } | |
e055595d | 3553 | #else /* ! CONFIG_SPU_BASE */ |
ff8a8f25 ME |
3554 | static int do_spu_cmd(void) |
3555 | { | |
3556 | return -1; | |
3557 | } | |
3558 | #endif |