Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Routines providing a simple monitor for use on the PowerMac. | |
3 | * | |
fca5dcd4 | 4 | * Copyright (C) 1996-2005 Paul Mackerras. |
47679283 ME |
5 | * Copyright (C) 2001 PPC64 Team, IBM Corp |
6 | * Copyrignt (C) 2006 Michael Ellerman, IBM Corp | |
1da177e4 LT |
7 | * |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
56144ec7 ME |
13 | |
14 | #include <linux/kernel.h> | |
1da177e4 | 15 | #include <linux/errno.h> |
3f07c014 | 16 | #include <linux/sched/signal.h> |
1da177e4 LT |
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> |
80eff6c4 | 31 | #include <linux/highmem.h> |
1da177e4 | 32 | |
7644d581 | 33 | #include <asm/debugfs.h> |
1da177e4 | 34 | #include <asm/ptrace.h> |
243e2511 | 35 | #include <asm/smp.h> |
1da177e4 LT |
36 | #include <asm/string.h> |
37 | #include <asm/prom.h> | |
38 | #include <asm/machdep.h> | |
f78541dc | 39 | #include <asm/xmon.h> |
1da177e4 LT |
40 | #include <asm/processor.h> |
41 | #include <asm/pgtable.h> | |
42 | #include <asm/mmu.h> | |
43 | #include <asm/mmu_context.h> | |
ab83dc79 | 44 | #include <asm/plpar_wrappers.h> |
1da177e4 LT |
45 | #include <asm/cputable.h> |
46 | #include <asm/rtas.h> | |
47 | #include <asm/sstep.h> | |
f583ffce | 48 | #include <asm/irq_regs.h> |
ff8a8f25 ME |
49 | #include <asm/spu.h> |
50 | #include <asm/spu_priv1.h> | |
c3b75bd7 | 51 | #include <asm/setjmp.h> |
322b4394 | 52 | #include <asm/reg.h> |
ae3a197e | 53 | #include <asm/debug.h> |
9422de3e | 54 | #include <asm/hw_breakpoint.h> |
243e2511 | 55 | #include <asm/xive.h> |
fde93a0f AD |
56 | #include <asm/opal.h> |
57 | #include <asm/firmware.h> | |
efe4fbb1 | 58 | #include <asm/code-patching.h> |
fde93a0f | 59 | |
f78541dc | 60 | #ifdef CONFIG_PPC64 |
1da177e4 | 61 | #include <asm/hvcall.h> |
f78541dc PM |
62 | #include <asm/paca.h> |
63 | #endif | |
1da177e4 LT |
64 | |
65 | #include "nonstdio.h" | |
e0426047 | 66 | #include "dis-asm.h" |
1da177e4 | 67 | |
1da177e4 | 68 | #ifdef CONFIG_SMP |
1c8950ff | 69 | static cpumask_t cpus_in_xmon = CPU_MASK_NONE; |
1da177e4 LT |
70 | static unsigned long xmon_taken = 1; |
71 | static int xmon_owner; | |
72 | static int xmon_gate; | |
ddadb6b8 ME |
73 | #else |
74 | #define xmon_owner 0 | |
1da177e4 LT |
75 | #endif /* CONFIG_SMP */ |
76 | ||
5be3492f | 77 | static unsigned long in_xmon __read_mostly = 0; |
3b5bf42b | 78 | static int xmon_on = IS_ENABLED(CONFIG_XMON_DEFAULT); |
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]; | |
ed49f7fd | 88 | static int tracing_enabled; |
1da177e4 | 89 | |
1da177e4 LT |
90 | static long bus_error_jmp[JMP_BUF_LEN]; |
91 | static int catch_memory_errors; | |
31cdd0c3 | 92 | static int catch_spr_faults; |
1da177e4 | 93 | static long *xmon_fault_jmp[NR_CPUS]; |
1da177e4 LT |
94 | |
95 | /* Breakpoint stuff */ | |
96 | struct bpt { | |
97 | unsigned long address; | |
98 | unsigned int instr[2]; | |
99 | atomic_t ref_count; | |
100 | int enabled; | |
101 | unsigned long pad; | |
102 | }; | |
103 | ||
104 | /* Bits in bpt.enabled */ | |
abb90ee7 ME |
105 | #define BP_CIABR 1 |
106 | #define BP_TRAP 2 | |
107 | #define BP_DABR 4 | |
1da177e4 LT |
108 | |
109 | #define NBPTS 256 | |
110 | static struct bpt bpts[NBPTS]; | |
111 | static struct bpt dabr; | |
112 | static struct bpt *iabr; | |
113 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
114 | ||
115 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
116 | ||
117 | /* Prototypes */ | |
118 | static int cmds(struct pt_regs *); | |
119 | static int mread(unsigned long, void *, int); | |
120 | static int mwrite(unsigned long, void *, int); | |
121 | static int handle_fault(struct pt_regs *); | |
122 | static void byterev(unsigned char *, int); | |
123 | static void memex(void); | |
124 | static int bsesc(void); | |
125 | static void dump(void); | |
80eff6c4 | 126 | static void show_pte(unsigned long); |
1da177e4 LT |
127 | static void prdump(unsigned long, long); |
128 | static int ppc_inst_dump(unsigned long, long, int); | |
f312deb4 | 129 | static void dump_log_buf(void); |
fde93a0f AD |
130 | |
131 | #ifdef CONFIG_PPC_POWERNV | |
132 | static void dump_opal_msglog(void); | |
133 | #else | |
134 | static inline void dump_opal_msglog(void) | |
135 | { | |
136 | printf("Machine is not running OPAL firmware.\n"); | |
137 | } | |
138 | #endif | |
139 | ||
1da177e4 LT |
140 | static void backtrace(struct pt_regs *); |
141 | static void excprint(struct pt_regs *); | |
142 | static void prregs(struct pt_regs *); | |
143 | static void memops(int); | |
144 | static void memlocate(void); | |
145 | static void memzcan(void); | |
146 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
147 | int skipbl(void); | |
148 | int scanhex(unsigned long *valp); | |
149 | static void scannl(void); | |
150 | static int hexdigit(int); | |
151 | void getstring(char *, int); | |
152 | static void flush_input(void); | |
153 | static int inchar(void); | |
154 | static void take_input(char *); | |
31cdd0c3 | 155 | static int read_spr(int, unsigned long *); |
1da177e4 LT |
156 | static void write_spr(int, unsigned long); |
157 | static void super_regs(void); | |
158 | static void remove_bpts(void); | |
159 | static void insert_bpts(void); | |
160 | static void remove_cpu_bpts(void); | |
161 | static void insert_cpu_bpts(void); | |
162 | static struct bpt *at_breakpoint(unsigned long pc); | |
163 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
164 | static int do_step(struct pt_regs *); | |
165 | static void bpt_cmds(void); | |
166 | static void cacheflush(void); | |
167 | static int cpu_cmd(void); | |
168 | static void csum(void); | |
169 | static void bootcmds(void); | |
f78541dc | 170 | static void proccall(void); |
6dfb5404 | 171 | static void show_tasks(void); |
1da177e4 LT |
172 | void dump_segments(void); |
173 | static void symbol_lookup(void); | |
26c8af5f OH |
174 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
175 | unsigned long pc); | |
1da177e4 LT |
176 | static void xmon_print_symbol(unsigned long address, const char *mid, |
177 | const char *after); | |
178 | static const char *getvecname(unsigned long vec); | |
179 | ||
ff8a8f25 ME |
180 | static int do_spu_cmd(void); |
181 | ||
5a8a1a28 BH |
182 | #ifdef CONFIG_44x |
183 | static void dump_tlb_44x(void); | |
184 | #endif | |
03247157 BH |
185 | #ifdef CONFIG_PPC_BOOK3E |
186 | static void dump_tlb_book3e(void); | |
187 | #endif | |
5a8a1a28 | 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\ | |
5e48dc0a DM |
215 | d1 dump 1 byte values\n\ |
216 | d2 dump 2 byte values\n\ | |
217 | d4 dump 4 byte values\n\ | |
218 | d8 dump 8 byte values\n\ | |
1da177e4 LT |
219 | di dump instructions\n\ |
220 | df dump float values\n\ | |
221 | dd dump double values\n\ | |
ddadb6b8 | 222 | dl dump the kernel log buffer\n" |
fde93a0f AD |
223 | #ifdef CONFIG_PPC_POWERNV |
224 | "\ | |
225 | do dump the OPAL message log\n" | |
226 | #endif | |
ddadb6b8 ME |
227 | #ifdef CONFIG_PPC64 |
228 | "\ | |
229 | dp[#] dump paca for current cpu, or cpu #\n\ | |
230 | dpa dump paca for all possible cpus\n" | |
231 | #endif | |
232 | "\ | |
7e5b5938 | 233 | dr dump stream of raw bytes\n\ |
80eff6c4 | 234 | dv dump virtual address translation \n\ |
56144ec7 | 235 | dt dump the tracing buffers (uses printk)\n\ |
4125d012 | 236 | dtc dump the tracing buffers for current CPU (uses printk)\n\ |
243e2511 BH |
237 | " |
238 | #ifdef CONFIG_PPC_POWERNV | |
239 | " dx# dump xive on CPU #\n\ | |
240 | dxi# dump xive irq state #\n\ | |
241 | dxa dump xive on all CPUs\n" | |
242 | #endif | |
243 | " e print exception information\n\ | |
1da177e4 LT |
244 | f flush cache\n\ |
245 | la lookup symbol+offset of specified address\n\ | |
246 | ls lookup address of specified symbol\n\ | |
247 | m examine/change memory\n\ | |
248 | mm move a block of memory\n\ | |
249 | ms set a block of memory\n\ | |
250 | md compare two blocks of memory\n\ | |
251 | ml locate a block of memory\n\ | |
252 | mz zero a block of memory\n\ | |
253 | mi show information about memory allocation\n\ | |
f78541dc | 254 | p call a procedure\n\ |
6dfb5404 | 255 | P list processes/tasks\n\ |
1da177e4 | 256 | r print registers\n\ |
ff8a8f25 | 257 | s single step\n" |
e055595d | 258 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 | 259 | " ss stop execution on all spus\n\ |
a8984970 | 260 | sr restore execution on stopped spus\n\ |
24a24c85 | 261 | sf # dump spu fields for spu # (in hex)\n\ |
c99176a2 | 262 | sd # dump spu local store for spu # (in hex)\n\ |
af89fb80 | 263 | sdi # disassemble spu local store for spu # (in hex)\n" |
ff8a8f25 ME |
264 | #endif |
265 | " S print special registers\n\ | |
31cdd0c3 PM |
266 | Sa print all SPRs\n\ |
267 | Sr # read SPR #\n\ | |
268 | Sw #v write v to SPR #\n\ | |
1da177e4 | 269 | t print backtrace\n\ |
1da177e4 | 270 | x exit monitor and recover\n\ |
2e340579 | 271 | X exit monitor and don't recover\n" |
79873e8d | 272 | #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) |
f78541dc | 273 | " u dump segment table or SLB\n" |
79873e8d | 274 | #elif defined(CONFIG_PPC_STD_MMU_32) |
f78541dc | 275 | " u dump segment registers\n" |
79873e8d | 276 | #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) |
5a8a1a28 BH |
277 | " u dump TLB\n" |
278 | #endif | |
59d3391e | 279 | " U show uptime information\n" |
f78541dc | 280 | " ? help\n" |
0c23a88c | 281 | " # n limit output to n lines per page (for dp, dpa, dl)\n" |
f78541dc | 282 | " zr reboot\n\ |
1da177e4 LT |
283 | zh halt\n" |
284 | ; | |
285 | ||
286 | static struct pt_regs *xmon_regs; | |
287 | ||
f78541dc | 288 | static inline void sync(void) |
1da177e4 LT |
289 | { |
290 | asm volatile("sync; isync"); | |
291 | } | |
292 | ||
f78541dc PM |
293 | static inline void store_inst(void *p) |
294 | { | |
295 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
296 | } | |
297 | ||
298 | static inline void cflush(void *p) | |
299 | { | |
300 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
301 | } | |
302 | ||
303 | static inline void cinval(void *p) | |
304 | { | |
305 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
306 | } | |
1da177e4 | 307 | |
1ad7d705 AK |
308 | /** |
309 | * write_ciabr() - write the CIABR SPR | |
310 | * @ciabr: The value to write. | |
311 | * | |
312 | * This function writes a value to the CIARB register either directly | |
313 | * through mtspr instruction if the kernel is in HV privilege mode or | |
314 | * call a hypervisor function to achieve the same in case the kernel | |
315 | * is in supervisor privilege mode. | |
316 | */ | |
317 | static void write_ciabr(unsigned long ciabr) | |
318 | { | |
319 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
320 | return; | |
321 | ||
322 | if (cpu_has_feature(CPU_FTR_HVMODE)) { | |
323 | mtspr(SPRN_CIABR, ciabr); | |
324 | return; | |
325 | } | |
7c09c186 | 326 | plpar_set_ciabr(ciabr); |
1ad7d705 AK |
327 | } |
328 | ||
329 | /** | |
330 | * set_ciabr() - set the CIABR | |
331 | * @addr: The value to set. | |
332 | * | |
333 | * This function sets the correct privilege value into the the HW | |
334 | * breakpoint address before writing it up in the CIABR register. | |
335 | */ | |
336 | static void set_ciabr(unsigned long addr) | |
337 | { | |
338 | addr &= ~CIABR_PRIV; | |
339 | ||
340 | if (cpu_has_feature(CPU_FTR_HVMODE)) | |
341 | addr |= CIABR_PRIV_HYPER; | |
342 | else | |
343 | addr |= CIABR_PRIV_SUPER; | |
344 | write_ciabr(addr); | |
345 | } | |
346 | ||
1da177e4 LT |
347 | /* |
348 | * Disable surveillance (the service processor watchdog function) | |
349 | * while we are in xmon. | |
350 | * XXX we should re-enable it when we leave. :) | |
351 | */ | |
352 | #define SURVEILLANCE_TOKEN 9000 | |
353 | ||
354 | static inline void disable_surveillance(void) | |
355 | { | |
356 | #ifdef CONFIG_PPC_PSERIES | |
357 | /* Since this can't be a module, args should end up below 4GB. */ | |
358 | static struct rtas_args args; | |
08eb105a | 359 | int token; |
1da177e4 LT |
360 | |
361 | /* | |
362 | * At this point we have got all the cpus we can into | |
363 | * xmon, so there is hopefully no other cpu calling RTAS | |
364 | * at the moment, even though we don't take rtas.lock. | |
365 | * If we did try to take rtas.lock there would be a | |
366 | * real possibility of deadlock. | |
367 | */ | |
08eb105a ME |
368 | token = rtas_token("set-indicator"); |
369 | if (token == RTAS_UNKNOWN_SERVICE) | |
1da177e4 | 370 | return; |
08eb105a ME |
371 | |
372 | rtas_call_unlocked(&args, token, 3, 1, NULL, SURVEILLANCE_TOKEN, 0, 0); | |
373 | ||
1da177e4 LT |
374 | #endif /* CONFIG_PPC_PSERIES */ |
375 | } | |
376 | ||
377 | #ifdef CONFIG_SMP | |
378 | static int xmon_speaker; | |
379 | ||
380 | static void get_output_lock(void) | |
381 | { | |
382 | int me = smp_processor_id() + 0x100; | |
383 | int last_speaker = 0, prev; | |
384 | long timeout; | |
385 | ||
386 | if (xmon_speaker == me) | |
387 | return; | |
730efb61 | 388 | |
1da177e4 | 389 | for (;;) { |
730efb61 ME |
390 | last_speaker = cmpxchg(&xmon_speaker, 0, me); |
391 | if (last_speaker == 0) | |
392 | return; | |
393 | ||
15075897 ME |
394 | /* |
395 | * Wait a full second for the lock, we might be on a slow | |
396 | * console, but check every 100us. | |
397 | */ | |
398 | timeout = 10000; | |
1da177e4 | 399 | while (xmon_speaker == last_speaker) { |
15075897 ME |
400 | if (--timeout > 0) { |
401 | udelay(100); | |
1da177e4 | 402 | continue; |
15075897 ME |
403 | } |
404 | ||
1da177e4 LT |
405 | /* hostile takeover */ |
406 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
407 | if (prev == last_speaker) | |
408 | return; | |
409 | break; | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | static void release_output_lock(void) | |
415 | { | |
416 | xmon_speaker = 0; | |
417 | } | |
1c8950ff ME |
418 | |
419 | int cpus_are_in_xmon(void) | |
420 | { | |
104699c0 | 421 | return !cpumask_empty(&cpus_in_xmon); |
1c8950ff | 422 | } |
1cd6ed7c NP |
423 | |
424 | static bool wait_for_other_cpus(int ncpus) | |
425 | { | |
426 | unsigned long timeout; | |
427 | ||
428 | /* We wait for 2s, which is a metric "little while" */ | |
429 | for (timeout = 20000; timeout != 0; --timeout) { | |
430 | if (cpumask_weight(&cpus_in_xmon) >= ncpus) | |
431 | return true; | |
432 | udelay(100); | |
433 | barrier(); | |
434 | } | |
435 | ||
436 | return false; | |
437 | } | |
438 | #endif /* CONFIG_SMP */ | |
1da177e4 | 439 | |
daf8f403 JB |
440 | static inline int unrecoverable_excp(struct pt_regs *regs) |
441 | { | |
08f6d6ab | 442 | #if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E) |
66857b3a | 443 | /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */ |
daf8f403 JB |
444 | return 0; |
445 | #else | |
446 | return ((regs->msr & MSR_RI) == 0); | |
447 | #endif | |
448 | } | |
449 | ||
b0da9856 | 450 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
451 | { |
452 | int cmd = 0; | |
1da177e4 LT |
453 | struct bpt *bp; |
454 | long recurse_jmp[JMP_BUF_LEN]; | |
455 | unsigned long offset; | |
f13659e0 | 456 | unsigned long flags; |
1da177e4 LT |
457 | #ifdef CONFIG_SMP |
458 | int cpu; | |
459 | int secondary; | |
1da177e4 LT |
460 | #endif |
461 | ||
f13659e0 | 462 | local_irq_save(flags); |
a71d64b4 | 463 | hard_irq_disable(); |
1da177e4 | 464 | |
ed49f7fd BL |
465 | tracing_enabled = tracing_is_on(); |
466 | tracing_off(); | |
467 | ||
1da177e4 LT |
468 | bp = in_breakpoint_table(regs->nip, &offset); |
469 | if (bp != NULL) { | |
470 | regs->nip = bp->address + offset; | |
471 | atomic_dec(&bp->ref_count); | |
472 | } | |
473 | ||
474 | remove_cpu_bpts(); | |
475 | ||
476 | #ifdef CONFIG_SMP | |
477 | cpu = smp_processor_id(); | |
104699c0 | 478 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
31cdd0c3 PM |
479 | /* |
480 | * We catch SPR read/write faults here because the 0x700, 0xf60 | |
481 | * etc. handlers don't call debugger_fault_handler(). | |
482 | */ | |
483 | if (catch_spr_faults) | |
484 | longjmp(bus_error_jmp, 1); | |
1da177e4 LT |
485 | get_output_lock(); |
486 | excprint(regs); | |
487 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
488 | "returning to main loop\n", | |
489 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 490 | release_output_lock(); |
1da177e4 LT |
491 | longjmp(xmon_fault_jmp[cpu], 1); |
492 | } | |
493 | ||
494 | if (setjmp(recurse_jmp) != 0) { | |
495 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 496 | get_output_lock(); |
1da177e4 LT |
497 | printf("xmon: WARNING: bad recursive fault " |
498 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 499 | release_output_lock(); |
1da177e4 LT |
500 | goto waiting; |
501 | } | |
502 | secondary = !(xmon_taken && cpu == xmon_owner); | |
503 | goto cmdloop; | |
504 | } | |
505 | ||
506 | xmon_fault_jmp[cpu] = recurse_jmp; | |
1da177e4 LT |
507 | |
508 | bp = NULL; | |
9f0b0793 | 509 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) |
1da177e4 | 510 | bp = at_breakpoint(regs->nip); |
daf8f403 | 511 | if (bp || unrecoverable_excp(regs)) |
1da177e4 LT |
512 | fromipi = 0; |
513 | ||
514 | if (!fromipi) { | |
515 | get_output_lock(); | |
516 | excprint(regs); | |
517 | if (bp) { | |
e70d8f55 | 518 | printf("cpu 0x%x stopped at breakpoint 0x%tx (", |
1da177e4 LT |
519 | cpu, BP_NUM(bp)); |
520 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
521 | } | |
daf8f403 | 522 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
523 | printf("WARNING: exception is not recoverable, " |
524 | "can't continue\n"); | |
525 | release_output_lock(); | |
526 | } | |
527 | ||
d2b496e5 ME |
528 | cpumask_set_cpu(cpu, &cpus_in_xmon); |
529 | ||
1da177e4 LT |
530 | waiting: |
531 | secondary = 1; | |
064996d6 | 532 | spin_begin(); |
1da177e4 LT |
533 | while (secondary && !xmon_gate) { |
534 | if (in_xmon == 0) { | |
064996d6 NP |
535 | if (fromipi) { |
536 | spin_end(); | |
1da177e4 | 537 | goto leave; |
064996d6 | 538 | } |
1da177e4 LT |
539 | secondary = test_and_set_bit(0, &in_xmon); |
540 | } | |
064996d6 NP |
541 | spin_cpu_relax(); |
542 | touch_nmi_watchdog(); | |
1da177e4 | 543 | } |
064996d6 | 544 | spin_end(); |
1da177e4 LT |
545 | |
546 | if (!secondary && !xmon_gate) { | |
547 | /* we are the first cpu to come in */ | |
548 | /* interrupt other cpu(s) */ | |
549 | int ncpus = num_online_cpus(); | |
550 | ||
551 | xmon_owner = cpu; | |
552 | mb(); | |
553 | if (ncpus > 1) { | |
1cd6ed7c NP |
554 | /* |
555 | * A system reset (trap == 0x100) can be triggered on | |
556 | * all CPUs, so when we come in via 0x100 try waiting | |
557 | * for the other CPUs to come in before we send the | |
558 | * debugger break (IPI). This is similar to | |
559 | * crash_kexec_secondary(). | |
560 | */ | |
561 | if (TRAP(regs) != 0x100 || !wait_for_other_cpus(ncpus)) | |
562 | smp_send_debugger_break(); | |
563 | ||
564 | wait_for_other_cpus(ncpus); | |
1da177e4 LT |
565 | } |
566 | remove_bpts(); | |
567 | disable_surveillance(); | |
568 | /* for breakpoint or single step, print the current instr. */ | |
569 | if (bp || TRAP(regs) == 0xd00) | |
570 | ppc_inst_dump(regs->nip, 1, 0); | |
571 | printf("enter ? for help\n"); | |
572 | mb(); | |
573 | xmon_gate = 1; | |
574 | barrier(); | |
064996d6 | 575 | touch_nmi_watchdog(); |
1da177e4 LT |
576 | } |
577 | ||
578 | cmdloop: | |
579 | while (in_xmon) { | |
580 | if (secondary) { | |
064996d6 | 581 | spin_begin(); |
1da177e4 LT |
582 | if (cpu == xmon_owner) { |
583 | if (!test_and_set_bit(0, &xmon_taken)) { | |
584 | secondary = 0; | |
064996d6 | 585 | spin_end(); |
1da177e4 LT |
586 | continue; |
587 | } | |
588 | /* missed it */ | |
589 | while (cpu == xmon_owner) | |
064996d6 | 590 | spin_cpu_relax(); |
1da177e4 | 591 | } |
064996d6 NP |
592 | spin_cpu_relax(); |
593 | touch_nmi_watchdog(); | |
1da177e4 LT |
594 | } else { |
595 | cmd = cmds(regs); | |
596 | if (cmd != 0) { | |
597 | /* exiting xmon */ | |
598 | insert_bpts(); | |
599 | xmon_gate = 0; | |
600 | wmb(); | |
601 | in_xmon = 0; | |
602 | break; | |
603 | } | |
604 | /* have switched to some other cpu */ | |
605 | secondary = 1; | |
606 | } | |
607 | } | |
608 | leave: | |
104699c0 | 609 | cpumask_clear_cpu(cpu, &cpus_in_xmon); |
1da177e4 | 610 | xmon_fault_jmp[cpu] = NULL; |
1da177e4 LT |
611 | #else |
612 | /* UP is simple... */ | |
613 | if (in_xmon) { | |
614 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
615 | regs->trap, getvecname(TRAP(regs))); | |
616 | longjmp(xmon_fault_jmp[0], 1); | |
617 | } | |
618 | if (setjmp(recurse_jmp) == 0) { | |
619 | xmon_fault_jmp[0] = recurse_jmp; | |
620 | in_xmon = 1; | |
621 | ||
622 | excprint(regs); | |
623 | bp = at_breakpoint(regs->nip); | |
624 | if (bp) { | |
e70d8f55 | 625 | printf("Stopped at breakpoint %tx (", BP_NUM(bp)); |
1da177e4 LT |
626 | xmon_print_symbol(regs->nip, " ", ")\n"); |
627 | } | |
daf8f403 | 628 | if (unrecoverable_excp(regs)) |
1da177e4 LT |
629 | printf("WARNING: exception is not recoverable, " |
630 | "can't continue\n"); | |
631 | remove_bpts(); | |
632 | disable_surveillance(); | |
633 | /* for breakpoint or single step, print the current instr. */ | |
634 | if (bp || TRAP(regs) == 0xd00) | |
635 | ppc_inst_dump(regs->nip, 1, 0); | |
636 | printf("enter ? for help\n"); | |
637 | } | |
638 | ||
639 | cmd = cmds(regs); | |
640 | ||
641 | insert_bpts(); | |
642 | in_xmon = 0; | |
643 | #endif | |
644 | ||
cdd3904d JB |
645 | #ifdef CONFIG_BOOKE |
646 | if (regs->msr & MSR_DE) { | |
647 | bp = at_breakpoint(regs->nip); | |
648 | if (bp != NULL) { | |
649 | regs->nip = (unsigned long) &bp->instr[0]; | |
650 | atomic_inc(&bp->ref_count); | |
651 | } | |
652 | } | |
653 | #else | |
9f0b0793 | 654 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
655 | bp = at_breakpoint(regs->nip); |
656 | if (bp != NULL) { | |
657 | int stepped = emulate_step(regs, bp->instr[0]); | |
658 | if (stepped == 0) { | |
659 | regs->nip = (unsigned long) &bp->instr[0]; | |
660 | atomic_inc(&bp->ref_count); | |
661 | } else if (stepped < 0) { | |
662 | printf("Couldn't single-step %s instruction\n", | |
663 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
664 | } | |
665 | } | |
666 | } | |
cdd3904d | 667 | #endif |
1da177e4 LT |
668 | insert_cpu_bpts(); |
669 | ||
a71d64b4 | 670 | touch_nmi_watchdog(); |
f13659e0 | 671 | local_irq_restore(flags); |
1da177e4 | 672 | |
0a730ae5 | 673 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
674 | } |
675 | ||
676 | int xmon(struct pt_regs *excp) | |
677 | { | |
678 | struct pt_regs regs; | |
679 | ||
680 | if (excp == NULL) { | |
322b4394 | 681 | ppc_save_regs(®s); |
1da177e4 LT |
682 | excp = ®s; |
683 | } | |
ff8a8f25 | 684 | |
1da177e4 LT |
685 | return xmon_core(excp, 0); |
686 | } | |
f78541dc PM |
687 | EXPORT_SYMBOL(xmon); |
688 | ||
f583ffce | 689 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
690 | { |
691 | unsigned long flags; | |
692 | local_irq_save(flags); | |
693 | printf("Keyboard interrupt\n"); | |
f583ffce | 694 | xmon(get_irq_regs()); |
f78541dc PM |
695 | local_irq_restore(flags); |
696 | return IRQ_HANDLED; | |
697 | } | |
1da177e4 | 698 | |
b0da9856 | 699 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
700 | { |
701 | struct bpt *bp; | |
702 | unsigned long offset; | |
703 | ||
9f0b0793 | 704 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 LT |
705 | return 0; |
706 | ||
707 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
708 | bp = in_breakpoint_table(regs->nip, &offset); | |
709 | if (bp != NULL && offset == 4) { | |
710 | regs->nip = bp->address + 4; | |
711 | atomic_dec(&bp->ref_count); | |
712 | return 1; | |
713 | } | |
714 | ||
715 | /* Are we at a breakpoint? */ | |
716 | bp = at_breakpoint(regs->nip); | |
717 | if (!bp) | |
718 | return 0; | |
719 | ||
720 | xmon_core(regs, 0); | |
721 | ||
722 | return 1; | |
723 | } | |
724 | ||
b0da9856 | 725 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
726 | { |
727 | if (user_mode(regs)) | |
728 | return 0; | |
729 | xmon_core(regs, 0); | |
730 | return 1; | |
731 | } | |
732 | ||
9422de3e | 733 | static int xmon_break_match(struct pt_regs *regs) |
1da177e4 | 734 | { |
9f0b0793 | 735 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 736 | return 0; |
fd9648df AB |
737 | if (dabr.enabled == 0) |
738 | return 0; | |
1da177e4 LT |
739 | xmon_core(regs, 0); |
740 | return 1; | |
741 | } | |
742 | ||
b0da9856 | 743 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 | 744 | { |
9f0b0793 | 745 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT)) |
1da177e4 | 746 | return 0; |
9f1067c2 | 747 | if (iabr == NULL) |
1da177e4 LT |
748 | return 0; |
749 | xmon_core(regs, 0); | |
750 | return 1; | |
751 | } | |
752 | ||
b0da9856 | 753 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
754 | { |
755 | #ifdef CONFIG_SMP | |
104699c0 | 756 | if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon)) |
1da177e4 LT |
757 | xmon_core(regs, 1); |
758 | #endif | |
759 | return 0; | |
760 | } | |
761 | ||
b0da9856 | 762 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
763 | { |
764 | struct bpt *bp; | |
765 | unsigned long offset; | |
766 | ||
767 | if (in_xmon && catch_memory_errors) | |
768 | handle_fault(regs); /* doesn't return */ | |
769 | ||
9f0b0793 | 770 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { |
1da177e4 LT |
771 | bp = in_breakpoint_table(regs->nip, &offset); |
772 | if (bp != NULL) { | |
773 | regs->nip = bp->address + offset; | |
774 | atomic_dec(&bp->ref_count); | |
775 | } | |
776 | } | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
7daf5930 MS |
781 | /* Force enable xmon if not already enabled */ |
782 | static inline void force_enable_xmon(void) | |
783 | { | |
784 | /* Enable xmon hooks if needed */ | |
785 | if (!xmon_on) { | |
786 | printf("xmon: Enabling debugger hooks\n"); | |
787 | xmon_on = 1; | |
788 | } | |
789 | } | |
790 | ||
1da177e4 LT |
791 | static struct bpt *at_breakpoint(unsigned long pc) |
792 | { | |
793 | int i; | |
794 | struct bpt *bp; | |
795 | ||
796 | bp = bpts; | |
797 | for (i = 0; i < NBPTS; ++i, ++bp) | |
798 | if (bp->enabled && pc == bp->address) | |
799 | return bp; | |
800 | return NULL; | |
801 | } | |
802 | ||
803 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
804 | { | |
805 | unsigned long off; | |
806 | ||
807 | off = nip - (unsigned long) bpts; | |
808 | if (off >= sizeof(bpts)) | |
809 | return NULL; | |
810 | off %= sizeof(struct bpt); | |
811 | if (off != offsetof(struct bpt, instr[0]) | |
812 | && off != offsetof(struct bpt, instr[1])) | |
813 | return NULL; | |
814 | *offp = off - offsetof(struct bpt, instr[0]); | |
815 | return (struct bpt *) (nip - off); | |
816 | } | |
817 | ||
818 | static struct bpt *new_breakpoint(unsigned long a) | |
819 | { | |
820 | struct bpt *bp; | |
821 | ||
822 | a &= ~3UL; | |
823 | bp = at_breakpoint(a); | |
824 | if (bp) | |
825 | return bp; | |
826 | ||
827 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
828 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
829 | bp->address = a; | |
830 | bp->instr[1] = bpinstr; | |
831 | store_inst(&bp->instr[1]); | |
832 | return bp; | |
833 | } | |
834 | } | |
835 | ||
836 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
837 | return NULL; | |
838 | } | |
839 | ||
840 | static void insert_bpts(void) | |
841 | { | |
842 | int i; | |
843 | struct bpt *bp; | |
844 | ||
845 | bp = bpts; | |
846 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 847 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0) |
1da177e4 LT |
848 | continue; |
849 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
850 | printf("Couldn't read instruction at %lx, " | |
851 | "disabling breakpoint there\n", bp->address); | |
852 | bp->enabled = 0; | |
853 | continue; | |
854 | } | |
855 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
856 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
857 | "instruction, disabling it\n", bp->address); | |
858 | bp->enabled = 0; | |
859 | continue; | |
860 | } | |
861 | store_inst(&bp->instr[0]); | |
abb90ee7 | 862 | if (bp->enabled & BP_CIABR) |
1da177e4 | 863 | continue; |
efe4fbb1 BS |
864 | if (patch_instruction((unsigned int *)bp->address, |
865 | bpinstr) != 0) { | |
1da177e4 LT |
866 | printf("Couldn't write instruction at %lx, " |
867 | "disabling breakpoint there\n", bp->address); | |
868 | bp->enabled &= ~BP_TRAP; | |
869 | continue; | |
870 | } | |
871 | store_inst((void *)bp->address); | |
872 | } | |
873 | } | |
874 | ||
875 | static void insert_cpu_bpts(void) | |
876 | { | |
9422de3e MN |
877 | struct arch_hw_breakpoint brk; |
878 | ||
879 | if (dabr.enabled) { | |
880 | brk.address = dabr.address; | |
881 | brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL; | |
882 | brk.len = 8; | |
21f58507 | 883 | __set_breakpoint(&brk); |
9422de3e | 884 | } |
1ad7d705 AK |
885 | |
886 | if (iabr) | |
887 | set_ciabr(iabr->address); | |
1da177e4 LT |
888 | } |
889 | ||
890 | static void remove_bpts(void) | |
891 | { | |
892 | int i; | |
893 | struct bpt *bp; | |
894 | unsigned instr; | |
895 | ||
896 | bp = bpts; | |
897 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
abb90ee7 | 898 | if ((bp->enabled & (BP_TRAP|BP_CIABR)) != BP_TRAP) |
1da177e4 LT |
899 | continue; |
900 | if (mread(bp->address, &instr, 4) == 4 | |
901 | && instr == bpinstr | |
efe4fbb1 BS |
902 | && patch_instruction( |
903 | (unsigned int *)bp->address, bp->instr[0]) != 0) | |
1da177e4 LT |
904 | printf("Couldn't remove breakpoint at %lx\n", |
905 | bp->address); | |
906 | else | |
907 | store_inst((void *)bp->address); | |
908 | } | |
909 | } | |
910 | ||
911 | static void remove_cpu_bpts(void) | |
912 | { | |
9422de3e | 913 | hw_breakpoint_disable(); |
1ad7d705 | 914 | write_ciabr(0); |
1da177e4 LT |
915 | } |
916 | ||
59d3391e GP |
917 | /* Based on uptime_proc_show(). */ |
918 | static void | |
919 | show_uptime(void) | |
920 | { | |
921 | struct timespec uptime; | |
922 | ||
923 | if (setjmp(bus_error_jmp) == 0) { | |
924 | catch_memory_errors = 1; | |
925 | sync(); | |
926 | ||
927 | get_monotonic_boottime(&uptime); | |
928 | printf("Uptime: %lu.%.2lu seconds\n", (unsigned long)uptime.tv_sec, | |
929 | ((unsigned long)uptime.tv_nsec / (NSEC_PER_SEC/100))); | |
930 | ||
931 | sync(); | |
932 | __delay(200); \ | |
933 | } | |
934 | catch_memory_errors = 0; | |
935 | } | |
936 | ||
958b7c80 S |
937 | static void set_lpp_cmd(void) |
938 | { | |
939 | unsigned long lpp; | |
940 | ||
941 | if (!scanhex(&lpp)) { | |
942 | printf("Invalid number.\n"); | |
943 | lpp = 0; | |
944 | } | |
945 | xmon_set_pagination_lpp(lpp); | |
946 | } | |
1da177e4 LT |
947 | /* Command interpreting routine */ |
948 | static char *last_cmd; | |
949 | ||
950 | static int | |
951 | cmds(struct pt_regs *excp) | |
952 | { | |
953 | int cmd = 0; | |
954 | ||
955 | last_cmd = NULL; | |
956 | xmon_regs = excp; | |
26c8af5f | 957 | |
b561783c | 958 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); |
26c8af5f | 959 | |
1da177e4 LT |
960 | for(;;) { |
961 | #ifdef CONFIG_SMP | |
962 | printf("%x:", smp_processor_id()); | |
963 | #endif /* CONFIG_SMP */ | |
964 | printf("mon> "); | |
1da177e4 LT |
965 | flush_input(); |
966 | termch = 0; | |
967 | cmd = skipbl(); | |
968 | if( cmd == '\n' ) { | |
969 | if (last_cmd == NULL) | |
970 | continue; | |
971 | take_input(last_cmd); | |
972 | last_cmd = NULL; | |
973 | cmd = inchar(); | |
974 | } | |
975 | switch (cmd) { | |
976 | case 'm': | |
977 | cmd = inchar(); | |
978 | switch (cmd) { | |
979 | case 'm': | |
980 | case 's': | |
981 | case 'd': | |
982 | memops(cmd); | |
983 | break; | |
984 | case 'l': | |
985 | memlocate(); | |
986 | break; | |
987 | case 'z': | |
988 | memzcan(); | |
989 | break; | |
990 | case 'i': | |
9af744d7 | 991 | show_mem(0, NULL); |
1da177e4 LT |
992 | break; |
993 | default: | |
994 | termch = cmd; | |
995 | memex(); | |
996 | } | |
997 | break; | |
998 | case 'd': | |
999 | dump(); | |
1000 | break; | |
1001 | case 'l': | |
1002 | symbol_lookup(); | |
1003 | break; | |
1004 | case 'r': | |
1005 | prregs(excp); /* print regs */ | |
1006 | break; | |
1007 | case 'e': | |
1008 | excprint(excp); | |
1009 | break; | |
1010 | case 'S': | |
1011 | super_regs(); | |
1012 | break; | |
1013 | case 't': | |
1014 | backtrace(excp); | |
1015 | break; | |
1016 | case 'f': | |
1017 | cacheflush(); | |
1018 | break; | |
1019 | case 's': | |
ff8a8f25 ME |
1020 | if (do_spu_cmd() == 0) |
1021 | break; | |
1da177e4 LT |
1022 | if (do_step(excp)) |
1023 | return cmd; | |
1024 | break; | |
1025 | case 'x': | |
1026 | case 'X': | |
ed49f7fd BL |
1027 | if (tracing_enabled) |
1028 | tracing_on(); | |
bb6b9b28 | 1029 | return cmd; |
1da177e4 | 1030 | case EOF: |
bb6b9b28 BH |
1031 | printf(" <no input ...>\n"); |
1032 | mdelay(2000); | |
1da177e4 LT |
1033 | return cmd; |
1034 | case '?': | |
4d404edc | 1035 | xmon_puts(help_string); |
1da177e4 | 1036 | break; |
958b7c80 S |
1037 | case '#': |
1038 | set_lpp_cmd(); | |
1039 | break; | |
1da177e4 LT |
1040 | case 'b': |
1041 | bpt_cmds(); | |
1042 | break; | |
1043 | case 'C': | |
1044 | csum(); | |
1045 | break; | |
1046 | case 'c': | |
1047 | if (cpu_cmd()) | |
1048 | return 0; | |
1049 | break; | |
1050 | case 'z': | |
1051 | bootcmds(); | |
1052 | break; | |
f78541dc PM |
1053 | case 'p': |
1054 | proccall(); | |
1da177e4 | 1055 | break; |
6dfb5404 DM |
1056 | case 'P': |
1057 | show_tasks(); | |
1058 | break; | |
f78541dc | 1059 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
1060 | case 'u': |
1061 | dump_segments(); | |
1062 | break; | |
d8ee6f34 | 1063 | #elif defined(CONFIG_44x) |
5a8a1a28 BH |
1064 | case 'u': |
1065 | dump_tlb_44x(); | |
1066 | break; | |
79873e8d | 1067 | #elif defined(CONFIG_PPC_BOOK3E) |
03247157 BH |
1068 | case 'u': |
1069 | dump_tlb_book3e(); | |
1070 | break; | |
f78541dc | 1071 | #endif |
59d3391e GP |
1072 | case 'U': |
1073 | show_uptime(); | |
1074 | break; | |
1da177e4 LT |
1075 | default: |
1076 | printf("Unrecognized command: "); | |
e3bc8049 | 1077 | do { |
1da177e4 LT |
1078 | if (' ' < cmd && cmd <= '~') |
1079 | putchar(cmd); | |
1080 | else | |
1081 | printf("\\x%x", cmd); | |
1082 | cmd = inchar(); | |
e3bc8049 | 1083 | } while (cmd != '\n'); |
1da177e4 LT |
1084 | printf(" (type ? for help)\n"); |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | } | |
1089 | ||
cdd3904d JB |
1090 | #ifdef CONFIG_BOOKE |
1091 | static int do_step(struct pt_regs *regs) | |
1092 | { | |
1093 | regs->msr |= MSR_DE; | |
1094 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
1095 | return 1; | |
1096 | } | |
1097 | #else | |
1da177e4 LT |
1098 | /* |
1099 | * Step a single instruction. | |
1100 | * Some instructions we emulate, others we execute with MSR_SE set. | |
1101 | */ | |
1102 | static int do_step(struct pt_regs *regs) | |
1103 | { | |
1104 | unsigned int instr; | |
1105 | int stepped; | |
1106 | ||
7daf5930 | 1107 | force_enable_xmon(); |
1da177e4 | 1108 | /* check we are in 64-bit kernel mode, translation enabled */ |
9f0b0793 | 1109 | if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) { |
1da177e4 LT |
1110 | if (mread(regs->nip, &instr, 4) == 4) { |
1111 | stepped = emulate_step(regs, instr); | |
1112 | if (stepped < 0) { | |
1113 | printf("Couldn't single-step %s instruction\n", | |
1114 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
1115 | return 0; | |
1116 | } | |
1117 | if (stepped > 0) { | |
1118 | regs->trap = 0xd00 | (regs->trap & 1); | |
1119 | printf("stepped to "); | |
1120 | xmon_print_symbol(regs->nip, " ", "\n"); | |
1121 | ppc_inst_dump(regs->nip, 1, 0); | |
1122 | return 0; | |
1123 | } | |
1124 | } | |
1125 | } | |
1126 | regs->msr |= MSR_SE; | |
1127 | return 1; | |
1128 | } | |
cdd3904d | 1129 | #endif |
1da177e4 LT |
1130 | |
1131 | static void bootcmds(void) | |
1132 | { | |
1133 | int cmd; | |
1134 | ||
1135 | cmd = inchar(); | |
1136 | if (cmd == 'r') | |
1137 | ppc_md.restart(NULL); | |
1138 | else if (cmd == 'h') | |
1139 | ppc_md.halt(); | |
1140 | else if (cmd == 'p') | |
9178ba29 AG |
1141 | if (pm_power_off) |
1142 | pm_power_off(); | |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | static int cpu_cmd(void) | |
1146 | { | |
1147 | #ifdef CONFIG_SMP | |
fd3bb912 | 1148 | unsigned long cpu, first_cpu, last_cpu; |
1da177e4 | 1149 | int timeout; |
1da177e4 LT |
1150 | |
1151 | if (!scanhex(&cpu)) { | |
1152 | /* print cpus waiting or in xmon */ | |
1153 | printf("cpus stopped:"); | |
fd3bb912 | 1154 | last_cpu = first_cpu = NR_CPUS; |
bc1d7702 | 1155 | for_each_possible_cpu(cpu) { |
104699c0 | 1156 | if (cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
fd3bb912 PM |
1157 | if (cpu == last_cpu + 1) { |
1158 | last_cpu = cpu; | |
1159 | } else { | |
1160 | if (last_cpu != first_cpu) | |
736256e4 | 1161 | printf("-0x%lx", last_cpu); |
fd3bb912 | 1162 | last_cpu = first_cpu = cpu; |
736256e4 | 1163 | printf(" 0x%lx", cpu); |
fd3bb912 | 1164 | } |
1da177e4 LT |
1165 | } |
1166 | } | |
fd3bb912 | 1167 | if (last_cpu != first_cpu) |
736256e4 | 1168 | printf("-0x%lx", last_cpu); |
1da177e4 LT |
1169 | printf("\n"); |
1170 | return 0; | |
1171 | } | |
1172 | /* try to switch to cpu specified */ | |
104699c0 | 1173 | if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) { |
e70d8f55 | 1174 | printf("cpu 0x%lx isn't in xmon\n", cpu); |
7b08729c ME |
1175 | #ifdef CONFIG_PPC64 |
1176 | printf("backtrace of paca[0x%lx].saved_r1 (possibly stale):\n", cpu); | |
1177 | xmon_show_stack(paca_ptrs[cpu]->saved_r1, 0, 0); | |
1178 | #endif | |
1da177e4 LT |
1179 | return 0; |
1180 | } | |
1181 | xmon_taken = 0; | |
1182 | mb(); | |
1183 | xmon_owner = cpu; | |
1184 | timeout = 10000000; | |
1185 | while (!xmon_taken) { | |
1186 | if (--timeout == 0) { | |
1187 | if (test_and_set_bit(0, &xmon_taken)) | |
1188 | break; | |
1189 | /* take control back */ | |
1190 | mb(); | |
1191 | xmon_owner = smp_processor_id(); | |
e70d8f55 | 1192 | printf("cpu 0x%lx didn't take control\n", cpu); |
1da177e4 LT |
1193 | return 0; |
1194 | } | |
1195 | barrier(); | |
1196 | } | |
1197 | return 1; | |
1198 | #else | |
1199 | return 0; | |
1200 | #endif /* CONFIG_SMP */ | |
1201 | } | |
1202 | ||
1203 | static unsigned short fcstab[256] = { | |
1204 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
1205 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
1206 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
1207 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
1208 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
1209 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
1210 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
1211 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
1212 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
1213 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
1214 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
1215 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
1216 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
1217 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
1218 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
1219 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
1220 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
1221 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
1222 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
1223 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
1224 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
1225 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1226 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1227 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1228 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1229 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1230 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1231 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1232 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1233 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1234 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1235 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1236 | }; | |
1237 | ||
1238 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1239 | ||
1240 | static void | |
1241 | csum(void) | |
1242 | { | |
1243 | unsigned int i; | |
1244 | unsigned short fcs; | |
1245 | unsigned char v; | |
1246 | ||
1247 | if (!scanhex(&adrs)) | |
1248 | return; | |
1249 | if (!scanhex(&ncsum)) | |
1250 | return; | |
1251 | fcs = 0xffff; | |
1252 | for (i = 0; i < ncsum; ++i) { | |
1253 | if (mread(adrs+i, &v, 1) == 0) { | |
736256e4 | 1254 | printf("csum stopped at "REG"\n", adrs+i); |
1da177e4 LT |
1255 | break; |
1256 | } | |
1257 | fcs = FCS(fcs, v); | |
1258 | } | |
1259 | printf("%x\n", fcs); | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * Check if this is a suitable place to put a breakpoint. | |
1264 | */ | |
1265 | static long check_bp_loc(unsigned long addr) | |
1266 | { | |
1267 | unsigned int instr; | |
1268 | ||
1269 | addr &= ~3; | |
51fae6de | 1270 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1271 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1272 | return 0; | |
1273 | } | |
1274 | if (!mread(addr, &instr, sizeof(instr))) { | |
1275 | printf("Can't read instruction at address %lx\n", addr); | |
1276 | return 0; | |
1277 | } | |
1278 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1279 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1280 | "instructions\n"); | |
1281 | return 0; | |
1282 | } | |
1283 | return 1; | |
1284 | } | |
1285 | ||
e3bc8049 | 1286 | static char *breakpoint_help_string = |
1da177e4 LT |
1287 | "Breakpoint command usage:\n" |
1288 | "b show breakpoints\n" | |
1289 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1290 | "bc clear all breakpoints\n" | |
1291 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1ad7d705 | 1292 | "bi <addr> [cnt] set hardware instr breakpoint (POWER8 only)\n" |
1da177e4 LT |
1293 | "bd <addr> [cnt] set hardware data breakpoint\n" |
1294 | ""; | |
1295 | ||
1296 | static void | |
1297 | bpt_cmds(void) | |
1298 | { | |
1299 | int cmd; | |
1300 | unsigned long a; | |
09b6c112 | 1301 | int i; |
1da177e4 | 1302 | struct bpt *bp; |
1da177e4 LT |
1303 | |
1304 | cmd = inchar(); | |
1305 | switch (cmd) { | |
09b6c112 NP |
1306 | #ifndef CONFIG_PPC_8xx |
1307 | static const char badaddr[] = "Only kernel addresses are permitted for breakpoints\n"; | |
1308 | int mode; | |
1da177e4 | 1309 | case 'd': /* bd - hardware data breakpoint */ |
9bc2bd5d MN |
1310 | if (!ppc_breakpoint_available()) { |
1311 | printf("Hardware data breakpoint not supported on this cpu\n"); | |
1312 | break; | |
1313 | } | |
1da177e4 LT |
1314 | mode = 7; |
1315 | cmd = inchar(); | |
1316 | if (cmd == 'r') | |
1317 | mode = 5; | |
1318 | else if (cmd == 'w') | |
1319 | mode = 6; | |
1320 | else | |
1321 | termch = cmd; | |
1322 | dabr.address = 0; | |
1323 | dabr.enabled = 0; | |
1324 | if (scanhex(&dabr.address)) { | |
51fae6de | 1325 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1326 | printf(badaddr); |
1327 | break; | |
1328 | } | |
9422de3e | 1329 | dabr.address &= ~HW_BRK_TYPE_DABR; |
1da177e4 LT |
1330 | dabr.enabled = mode | BP_DABR; |
1331 | } | |
e1368d0c VJ |
1332 | |
1333 | force_enable_xmon(); | |
1da177e4 LT |
1334 | break; |
1335 | ||
1336 | case 'i': /* bi - hardware instr breakpoint */ | |
1ad7d705 | 1337 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { |
1da177e4 LT |
1338 | printf("Hardware instruction breakpoint " |
1339 | "not supported on this cpu\n"); | |
1340 | break; | |
1341 | } | |
1342 | if (iabr) { | |
abb90ee7 | 1343 | iabr->enabled &= ~BP_CIABR; |
1da177e4 LT |
1344 | iabr = NULL; |
1345 | } | |
1346 | if (!scanhex(&a)) | |
1347 | break; | |
1348 | if (!check_bp_loc(a)) | |
1349 | break; | |
1350 | bp = new_breakpoint(a); | |
1351 | if (bp != NULL) { | |
abb90ee7 | 1352 | bp->enabled |= BP_CIABR; |
1da177e4 | 1353 | iabr = bp; |
e1368d0c | 1354 | force_enable_xmon(); |
1da177e4 LT |
1355 | } |
1356 | break; | |
f78541dc | 1357 | #endif |
1da177e4 LT |
1358 | |
1359 | case 'c': | |
1360 | if (!scanhex(&a)) { | |
1361 | /* clear all breakpoints */ | |
1362 | for (i = 0; i < NBPTS; ++i) | |
1363 | bpts[i].enabled = 0; | |
1364 | iabr = NULL; | |
1365 | dabr.enabled = 0; | |
1366 | printf("All breakpoints cleared\n"); | |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | if (a <= NBPTS && a >= 1) { | |
1371 | /* assume a breakpoint number */ | |
1372 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1373 | } else { | |
1374 | /* assume a breakpoint address */ | |
1375 | bp = at_breakpoint(a); | |
9f1067c2 | 1376 | if (bp == NULL) { |
736256e4 | 1377 | printf("No breakpoint at %lx\n", a); |
1da177e4 LT |
1378 | break; |
1379 | } | |
1380 | } | |
1381 | ||
e70d8f55 | 1382 | printf("Cleared breakpoint %tx (", BP_NUM(bp)); |
1da177e4 LT |
1383 | xmon_print_symbol(bp->address, " ", ")\n"); |
1384 | bp->enabled = 0; | |
1385 | break; | |
1386 | ||
1387 | default: | |
1388 | termch = cmd; | |
e3bc8049 | 1389 | cmd = skipbl(); |
1da177e4 LT |
1390 | if (cmd == '?') { |
1391 | printf(breakpoint_help_string); | |
1392 | break; | |
1393 | } | |
1394 | termch = cmd; | |
1395 | if (!scanhex(&a)) { | |
1396 | /* print all breakpoints */ | |
1397 | printf(" type address\n"); | |
1398 | if (dabr.enabled) { | |
f78541dc | 1399 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1400 | if (dabr.enabled & 1) |
1401 | printf("r"); | |
1402 | if (dabr.enabled & 2) | |
1403 | printf("w"); | |
1404 | printf("]\n"); | |
1405 | } | |
1406 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1407 | if (!bp->enabled) | |
1408 | continue; | |
e70d8f55 | 1409 | printf("%tx %s ", BP_NUM(bp), |
abb90ee7 | 1410 | (bp->enabled & BP_CIABR) ? "inst": "trap"); |
1da177e4 LT |
1411 | xmon_print_symbol(bp->address, " ", "\n"); |
1412 | } | |
1413 | break; | |
1414 | } | |
1415 | ||
1416 | if (!check_bp_loc(a)) | |
1417 | break; | |
1418 | bp = new_breakpoint(a); | |
e1368d0c | 1419 | if (bp != NULL) { |
1da177e4 | 1420 | bp->enabled |= BP_TRAP; |
e1368d0c VJ |
1421 | force_enable_xmon(); |
1422 | } | |
1da177e4 LT |
1423 | break; |
1424 | } | |
1425 | } | |
1426 | ||
1427 | /* Very cheap human name for vector lookup. */ | |
1428 | static | |
1429 | const char *getvecname(unsigned long vec) | |
1430 | { | |
1431 | char *ret; | |
1432 | ||
1433 | switch (vec) { | |
1434 | case 0x100: ret = "(System Reset)"; break; | |
1435 | case 0x200: ret = "(Machine Check)"; break; | |
1436 | case 0x300: ret = "(Data Access)"; break; | |
8915bcd6 MN |
1437 | case 0x380: |
1438 | if (radix_enabled()) | |
1439 | ret = "(Data Access Out of Range)"; | |
1440 | else | |
1441 | ret = "(Data SLB Access)"; | |
1442 | break; | |
1da177e4 | 1443 | case 0x400: ret = "(Instruction Access)"; break; |
8915bcd6 MN |
1444 | case 0x480: |
1445 | if (radix_enabled()) | |
1446 | ret = "(Instruction Access Out of Range)"; | |
1447 | else | |
1448 | ret = "(Instruction SLB Access)"; | |
1449 | break; | |
1da177e4 LT |
1450 | case 0x500: ret = "(Hardware Interrupt)"; break; |
1451 | case 0x600: ret = "(Alignment)"; break; | |
1452 | case 0x700: ret = "(Program Check)"; break; | |
1453 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1454 | case 0x900: ret = "(Decrementer)"; break; | |
660e034c ME |
1455 | case 0x980: ret = "(Hypervisor Decrementer)"; break; |
1456 | case 0xa00: ret = "(Doorbell)"; break; | |
1da177e4 LT |
1457 | case 0xc00: ret = "(System Call)"; break; |
1458 | case 0xd00: ret = "(Single Step)"; break; | |
660e034c ME |
1459 | case 0xe40: ret = "(Emulation Assist)"; break; |
1460 | case 0xe60: ret = "(HMI)"; break; | |
1461 | case 0xe80: ret = "(Hypervisor Doorbell)"; break; | |
1da177e4 LT |
1462 | case 0xf00: ret = "(Performance Monitor)"; break; |
1463 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1464 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
660e034c ME |
1465 | case 0x1500: ret = "(Denormalisation)"; break; |
1466 | case 0x1700: ret = "(Altivec Assist)"; break; | |
1da177e4 LT |
1467 | default: ret = ""; |
1468 | } | |
1469 | return ret; | |
1470 | } | |
1471 | ||
1472 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1473 | unsigned long *endp) | |
1474 | { | |
1475 | unsigned long size, offset; | |
1476 | const char *name; | |
1da177e4 LT |
1477 | |
1478 | *startp = *endp = 0; | |
1479 | if (pc == 0) | |
1480 | return; | |
1481 | if (setjmp(bus_error_jmp) == 0) { | |
1482 | catch_memory_errors = 1; | |
1483 | sync(); | |
ffb45122 | 1484 | name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr); |
1da177e4 LT |
1485 | if (name != NULL) { |
1486 | *startp = pc - offset; | |
1487 | *endp = pc - offset + size; | |
1488 | } | |
1489 | sync(); | |
1490 | } | |
1491 | catch_memory_errors = 0; | |
1492 | } | |
1493 | ||
ec2b36b9 BH |
1494 | #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) |
1495 | #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) | |
1496 | ||
1da177e4 LT |
1497 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1498 | unsigned long pc) | |
1499 | { | |
0104cd68 | 1500 | int max_to_print = 64; |
1da177e4 LT |
1501 | unsigned long ip; |
1502 | unsigned long newsp; | |
1503 | unsigned long marker; | |
1da177e4 LT |
1504 | struct pt_regs regs; |
1505 | ||
0104cd68 | 1506 | while (max_to_print--) { |
e71ff89c | 1507 | if (!is_kernel_addr(sp)) { |
1da177e4 LT |
1508 | if (sp != 0) |
1509 | printf("SP (%lx) is in userspace\n", sp); | |
1510 | break; | |
1511 | } | |
1512 | ||
f78541dc | 1513 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1514 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1515 | printf("Couldn't read stack frame at %lx\n", sp); | |
1516 | break; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * For the first stack frame, try to work out if | |
1521 | * LR and/or the saved LR value in the bottommost | |
1522 | * stack frame are valid. | |
1523 | */ | |
1524 | if ((pc | lr) != 0) { | |
1525 | unsigned long fnstart, fnend; | |
1526 | unsigned long nextip; | |
1527 | int printip = 1; | |
1528 | ||
1529 | get_function_bounds(pc, &fnstart, &fnend); | |
1530 | nextip = 0; | |
1531 | if (newsp > sp) | |
f78541dc | 1532 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1533 | sizeof(unsigned long)); |
1534 | if (lr == ip) { | |
e71ff89c | 1535 | if (!is_kernel_addr(lr) |
1da177e4 LT |
1536 | || (fnstart <= lr && lr < fnend)) |
1537 | printip = 0; | |
1538 | } else if (lr == nextip) { | |
1539 | printip = 0; | |
e71ff89c | 1540 | } else if (is_kernel_addr(lr) |
1da177e4 LT |
1541 | && !(fnstart <= lr && lr < fnend)) { |
1542 | printf("[link register ] "); | |
1543 | xmon_print_symbol(lr, " ", "\n"); | |
1544 | } | |
1545 | if (printip) { | |
f78541dc | 1546 | printf("["REG"] ", sp); |
1da177e4 LT |
1547 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1548 | } | |
1549 | pc = lr = 0; | |
1550 | ||
1551 | } else { | |
f78541dc | 1552 | printf("["REG"] ", sp); |
1da177e4 LT |
1553 | xmon_print_symbol(ip, " ", "\n"); |
1554 | } | |
1555 | ||
1556 | /* Look for "regshere" marker to see if this is | |
1557 | an exception frame. */ | |
f78541dc | 1558 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
ec2b36b9 | 1559 | && marker == STACK_FRAME_REGS_MARKER) { |
c4de3809 | 1560 | if (mread(sp + STACK_FRAME_OVERHEAD, ®s, sizeof(regs)) |
1da177e4 LT |
1561 | != sizeof(regs)) { |
1562 | printf("Couldn't read registers at %lx\n", | |
c4de3809 | 1563 | sp + STACK_FRAME_OVERHEAD); |
1da177e4 LT |
1564 | break; |
1565 | } | |
e3bc8049 | 1566 | printf("--- Exception: %lx %s at ", regs.trap, |
1da177e4 LT |
1567 | getvecname(TRAP(®s))); |
1568 | pc = regs.nip; | |
1569 | lr = regs.link; | |
1570 | xmon_print_symbol(pc, " ", "\n"); | |
1571 | } | |
1572 | ||
1573 | if (newsp == 0) | |
1574 | break; | |
1575 | ||
1576 | sp = newsp; | |
0104cd68 | 1577 | } |
1da177e4 LT |
1578 | } |
1579 | ||
1580 | static void backtrace(struct pt_regs *excp) | |
1581 | { | |
1582 | unsigned long sp; | |
1583 | ||
1584 | if (scanhex(&sp)) | |
1585 | xmon_show_stack(sp, 0, 0); | |
1586 | else | |
1587 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1588 | scannl(); | |
1589 | } | |
1590 | ||
1591 | static void print_bug_trap(struct pt_regs *regs) | |
1592 | { | |
ebdba9af | 1593 | #ifdef CONFIG_BUG |
73c9ceab | 1594 | const struct bug_entry *bug; |
1da177e4 LT |
1595 | unsigned long addr; |
1596 | ||
1597 | if (regs->msr & MSR_PR) | |
1598 | return; /* not in kernel */ | |
1599 | addr = regs->nip; /* address of trap instruction */ | |
e71ff89c | 1600 | if (!is_kernel_addr(addr)) |
1da177e4 LT |
1601 | return; |
1602 | bug = find_bug(regs->nip); | |
1603 | if (bug == NULL) | |
1604 | return; | |
73c9ceab | 1605 | if (is_warning_bug(bug)) |
1da177e4 LT |
1606 | return; |
1607 | ||
0a7c7efc | 1608 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
73c9ceab JF |
1609 | printf("kernel BUG at %s:%u!\n", |
1610 | bug->file, bug->line); | |
0a7c7efc | 1611 | #else |
d8104182 | 1612 | printf("kernel BUG at %px!\n", (void *)bug->bug_addr); |
0a7c7efc | 1613 | #endif |
ebdba9af | 1614 | #endif /* CONFIG_BUG */ |
1da177e4 LT |
1615 | } |
1616 | ||
9f1067c2 | 1617 | static void excprint(struct pt_regs *fp) |
1da177e4 LT |
1618 | { |
1619 | unsigned long trap; | |
1620 | ||
1621 | #ifdef CONFIG_SMP | |
1622 | printf("cpu 0x%x: ", smp_processor_id()); | |
1623 | #endif /* CONFIG_SMP */ | |
1624 | ||
1625 | trap = TRAP(fp); | |
e70d8f55 | 1626 | printf("Vector: %lx %s at [%px]\n", fp->trap, getvecname(trap), fp); |
1da177e4 LT |
1627 | printf(" pc: "); |
1628 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1629 | ||
e70d8f55 | 1630 | printf(" lr: "); |
1da177e4 LT |
1631 | xmon_print_symbol(fp->link, ": ", "\n"); |
1632 | ||
1633 | printf(" sp: %lx\n", fp->gpr[1]); | |
1634 | printf(" msr: %lx\n", fp->msr); | |
1635 | ||
ce54152f | 1636 | if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) { |
1da177e4 LT |
1637 | printf(" dar: %lx\n", fp->dar); |
1638 | if (trap != 0x380) | |
1639 | printf(" dsisr: %lx\n", fp->dsisr); | |
1640 | } | |
1641 | ||
e70d8f55 | 1642 | printf(" current = 0x%px\n", current); |
f78541dc | 1643 | #ifdef CONFIG_PPC64 |
3130a7bb | 1644 | printf(" paca = 0x%px\t irqmask: 0x%02x\t irq_happened: 0x%02x\n", |
4e26bc4a | 1645 | local_paca, local_paca->irq_soft_mask, local_paca->irq_happened); |
f78541dc | 1646 | #endif |
1da177e4 | 1647 | if (current) { |
e70d8f55 | 1648 | printf(" pid = %d, comm = %s\n", |
1da177e4 LT |
1649 | current->pid, current->comm); |
1650 | } | |
1651 | ||
1652 | if (trap == 0x700) | |
1653 | print_bug_trap(fp); | |
eb925d64 RG |
1654 | |
1655 | printf(linux_banner); | |
1da177e4 LT |
1656 | } |
1657 | ||
9f1067c2 | 1658 | static void prregs(struct pt_regs *fp) |
1da177e4 | 1659 | { |
f78541dc | 1660 | int n, trap; |
1da177e4 LT |
1661 | unsigned long base; |
1662 | struct pt_regs regs; | |
1663 | ||
1664 | if (scanhex(&base)) { | |
1665 | if (setjmp(bus_error_jmp) == 0) { | |
1666 | catch_memory_errors = 1; | |
1667 | sync(); | |
1668 | regs = *(struct pt_regs *)base; | |
1669 | sync(); | |
1670 | __delay(200); | |
1671 | } else { | |
1672 | catch_memory_errors = 0; | |
f78541dc | 1673 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1674 | base); |
1675 | return; | |
1676 | } | |
1677 | catch_memory_errors = 0; | |
1678 | fp = ®s; | |
1679 | } | |
1680 | ||
f78541dc | 1681 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1682 | if (FULL_REGS(fp)) { |
1683 | for (n = 0; n < 16; ++n) | |
e70d8f55 | 1684 | printf("R%.2d = "REG" R%.2d = "REG"\n", |
1da177e4 LT |
1685 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1686 | } else { | |
1687 | for (n = 0; n < 7; ++n) | |
e70d8f55 | 1688 | printf("R%.2d = "REG" R%.2d = "REG"\n", |
1da177e4 LT |
1689 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1690 | } | |
f78541dc PM |
1691 | #else |
1692 | for (n = 0; n < 32; ++n) { | |
e70d8f55 | 1693 | printf("R%.2d = %.8lx%s", n, fp->gpr[n], |
f78541dc PM |
1694 | (n & 3) == 3? "\n": " "); |
1695 | if (n == 12 && !FULL_REGS(fp)) { | |
1696 | printf("\n"); | |
1697 | break; | |
1698 | } | |
1699 | } | |
1700 | #endif | |
1da177e4 LT |
1701 | printf("pc = "); |
1702 | xmon_print_symbol(fp->nip, " ", "\n"); | |
48404f2e PM |
1703 | if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) { |
1704 | printf("cfar= "); | |
1705 | xmon_print_symbol(fp->orig_gpr3, " ", "\n"); | |
1706 | } | |
1da177e4 LT |
1707 | printf("lr = "); |
1708 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1709 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1710 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1711 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1712 | trap = TRAP(fp); |
1713 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1714 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1715 | } |
1716 | ||
9f1067c2 | 1717 | static void cacheflush(void) |
1da177e4 LT |
1718 | { |
1719 | int cmd; | |
1720 | unsigned long nflush; | |
1721 | ||
1722 | cmd = inchar(); | |
1723 | if (cmd != 'i') | |
1724 | termch = cmd; | |
1725 | scanhex((void *)&adrs); | |
1726 | if (termch != '\n') | |
1727 | termch = 0; | |
1728 | nflush = 1; | |
1729 | scanhex(&nflush); | |
1730 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1731 | if (setjmp(bus_error_jmp) == 0) { | |
1732 | catch_memory_errors = 1; | |
1733 | sync(); | |
1734 | ||
1735 | if (cmd != 'i') { | |
1736 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1737 | cflush((void *) adrs); | |
1738 | } else { | |
1739 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1740 | cinval((void *) adrs); | |
1741 | } | |
1742 | sync(); | |
1743 | /* wait a little while to see if we get a machine check */ | |
1744 | __delay(200); | |
1745 | } | |
1746 | catch_memory_errors = 0; | |
1747 | } | |
1748 | ||
31cdd0c3 PM |
1749 | extern unsigned long xmon_mfspr(int spr, unsigned long default_value); |
1750 | extern void xmon_mtspr(int spr, unsigned long value); | |
1751 | ||
1752 | static int | |
1753 | read_spr(int n, unsigned long *vp) | |
1da177e4 | 1754 | { |
1da177e4 | 1755 | unsigned long ret = -1UL; |
31cdd0c3 | 1756 | int ok = 0; |
1da177e4 LT |
1757 | |
1758 | if (setjmp(bus_error_jmp) == 0) { | |
31cdd0c3 | 1759 | catch_spr_faults = 1; |
1da177e4 LT |
1760 | sync(); |
1761 | ||
31cdd0c3 | 1762 | ret = xmon_mfspr(n, *vp); |
1da177e4 LT |
1763 | |
1764 | sync(); | |
31cdd0c3 PM |
1765 | *vp = ret; |
1766 | ok = 1; | |
1da177e4 | 1767 | } |
31cdd0c3 | 1768 | catch_spr_faults = 0; |
1da177e4 | 1769 | |
31cdd0c3 | 1770 | return ok; |
1da177e4 LT |
1771 | } |
1772 | ||
9f1067c2 | 1773 | static void |
1da177e4 LT |
1774 | write_spr(int n, unsigned long val) |
1775 | { | |
1da177e4 | 1776 | if (setjmp(bus_error_jmp) == 0) { |
31cdd0c3 | 1777 | catch_spr_faults = 1; |
1da177e4 LT |
1778 | sync(); |
1779 | ||
31cdd0c3 | 1780 | xmon_mtspr(n, val); |
1da177e4 LT |
1781 | |
1782 | sync(); | |
31cdd0c3 PM |
1783 | } else { |
1784 | printf("SPR 0x%03x (%4d) Faulted during write\n", n, n); | |
1da177e4 | 1785 | } |
31cdd0c3 | 1786 | catch_spr_faults = 0; |
1da177e4 LT |
1787 | } |
1788 | ||
1846193b ME |
1789 | static void dump_206_sprs(void) |
1790 | { | |
1791 | #ifdef CONFIG_PPC64 | |
1792 | if (!cpu_has_feature(CPU_FTR_ARCH_206)) | |
1793 | return; | |
1794 | ||
1795 | /* Actually some of these pre-date 2.06, but whatevs */ | |
1796 | ||
e70d8f55 | 1797 | printf("srr0 = %.16lx srr1 = %.16lx dsisr = %.8lx\n", |
1846193b | 1798 | mfspr(SPRN_SRR0), mfspr(SPRN_SRR1), mfspr(SPRN_DSISR)); |
e70d8f55 | 1799 | printf("dscr = %.16lx ppr = %.16lx pir = %.8lx\n", |
1846193b | 1800 | mfspr(SPRN_DSCR), mfspr(SPRN_PPR), mfspr(SPRN_PIR)); |
64d66aa0 BS |
1801 | printf("amr = %.16lx uamor = %.16lx\n", |
1802 | mfspr(SPRN_AMR), mfspr(SPRN_UAMOR)); | |
1846193b ME |
1803 | |
1804 | if (!(mfmsr() & MSR_HV)) | |
1805 | return; | |
1806 | ||
e70d8f55 | 1807 | printf("sdr1 = %.16lx hdar = %.16lx hdsisr = %.8lx\n", |
1846193b | 1808 | mfspr(SPRN_SDR1), mfspr(SPRN_HDAR), mfspr(SPRN_HDSISR)); |
64d66aa0 | 1809 | printf("hsrr0 = %.16lx hsrr1 = %.16lx hdec = %.16lx\n", |
1846193b | 1810 | mfspr(SPRN_HSRR0), mfspr(SPRN_HSRR1), mfspr(SPRN_HDEC)); |
e70d8f55 | 1811 | printf("lpcr = %.16lx pcr = %.16lx lpidr = %.8lx\n", |
1846193b | 1812 | mfspr(SPRN_LPCR), mfspr(SPRN_PCR), mfspr(SPRN_LPID)); |
64d66aa0 BS |
1813 | printf("hsprg0 = %.16lx hsprg1 = %.16lx amor = %.16lx\n", |
1814 | mfspr(SPRN_HSPRG0), mfspr(SPRN_HSPRG1), mfspr(SPRN_AMOR)); | |
c47a9403 | 1815 | printf("dabr = %.16lx dabrx = %.16lx\n", |
1846193b ME |
1816 | mfspr(SPRN_DABR), mfspr(SPRN_DABRX)); |
1817 | #endif | |
1818 | } | |
1819 | ||
e0ddf7a2 ME |
1820 | static void dump_207_sprs(void) |
1821 | { | |
1822 | #ifdef CONFIG_PPC64 | |
1823 | unsigned long msr; | |
1824 | ||
1825 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
1826 | return; | |
1827 | ||
e70d8f55 | 1828 | printf("dpdes = %.16lx tir = %.16lx cir = %.8lx\n", |
e0ddf7a2 ME |
1829 | mfspr(SPRN_DPDES), mfspr(SPRN_TIR), mfspr(SPRN_CIR)); |
1830 | ||
e70d8f55 | 1831 | printf("fscr = %.16lx tar = %.16lx pspb = %.8lx\n", |
e0ddf7a2 ME |
1832 | mfspr(SPRN_FSCR), mfspr(SPRN_TAR), mfspr(SPRN_PSPB)); |
1833 | ||
1834 | msr = mfmsr(); | |
1835 | if (msr & MSR_TM) { | |
1836 | /* Only if TM has been enabled in the kernel */ | |
c47a9403 | 1837 | printf("tfhar = %.16lx tfiar = %.16lx texasr = %.16lx\n", |
e0ddf7a2 ME |
1838 | mfspr(SPRN_TFHAR), mfspr(SPRN_TFIAR), |
1839 | mfspr(SPRN_TEXASR)); | |
1840 | } | |
1841 | ||
c47a9403 | 1842 | printf("mmcr0 = %.16lx mmcr1 = %.16lx mmcr2 = %.16lx\n", |
e0ddf7a2 | 1843 | mfspr(SPRN_MMCR0), mfspr(SPRN_MMCR1), mfspr(SPRN_MMCR2)); |
e70d8f55 | 1844 | printf("pmc1 = %.8lx pmc2 = %.8lx pmc3 = %.8lx pmc4 = %.8lx\n", |
e0ddf7a2 ME |
1845 | mfspr(SPRN_PMC1), mfspr(SPRN_PMC2), |
1846 | mfspr(SPRN_PMC3), mfspr(SPRN_PMC4)); | |
e70d8f55 | 1847 | printf("mmcra = %.16lx siar = %.16lx pmc5 = %.8lx\n", |
e0ddf7a2 | 1848 | mfspr(SPRN_MMCRA), mfspr(SPRN_SIAR), mfspr(SPRN_PMC5)); |
e70d8f55 | 1849 | printf("sdar = %.16lx sier = %.16lx pmc6 = %.8lx\n", |
e0ddf7a2 | 1850 | mfspr(SPRN_SDAR), mfspr(SPRN_SIER), mfspr(SPRN_PMC6)); |
c47a9403 | 1851 | printf("ebbhr = %.16lx ebbrr = %.16lx bescr = %.16lx\n", |
e0ddf7a2 | 1852 | mfspr(SPRN_EBBHR), mfspr(SPRN_EBBRR), mfspr(SPRN_BESCR)); |
64d66aa0 | 1853 | printf("iamr = %.16lx\n", mfspr(SPRN_IAMR)); |
e0ddf7a2 ME |
1854 | |
1855 | if (!(msr & MSR_HV)) | |
1856 | return; | |
1857 | ||
c47a9403 | 1858 | printf("hfscr = %.16lx dhdes = %.16lx rpr = %.16lx\n", |
e0ddf7a2 | 1859 | mfspr(SPRN_HFSCR), mfspr(SPRN_DHDES), mfspr(SPRN_RPR)); |
c47a9403 | 1860 | printf("dawr = %.16lx dawrx = %.16lx ciabr = %.16lx\n", |
e0ddf7a2 ME |
1861 | mfspr(SPRN_DAWR), mfspr(SPRN_DAWRX), mfspr(SPRN_CIABR)); |
1862 | #endif | |
1863 | } | |
1da177e4 | 1864 | |
d1e1b351 BS |
1865 | static void dump_300_sprs(void) |
1866 | { | |
1867 | #ifdef CONFIG_PPC64 | |
1868 | bool hv = mfmsr() & MSR_HV; | |
1869 | ||
1870 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) | |
1871 | return; | |
1872 | ||
1873 | printf("pidr = %.16lx tidr = %.16lx\n", | |
1874 | mfspr(SPRN_PID), mfspr(SPRN_TIDR)); | |
1875 | printf("asdr = %.16lx psscr = %.16lx\n", | |
1876 | mfspr(SPRN_ASDR), hv ? mfspr(SPRN_PSSCR) | |
1877 | : mfspr(SPRN_PSSCR_PR)); | |
1878 | ||
1879 | if (!hv) | |
1880 | return; | |
1881 | ||
1882 | printf("ptcr = %.16lx\n", | |
1883 | mfspr(SPRN_PTCR)); | |
1884 | #endif | |
1885 | } | |
1886 | ||
31cdd0c3 PM |
1887 | static void dump_one_spr(int spr, bool show_unimplemented) |
1888 | { | |
1889 | unsigned long val; | |
1890 | ||
1891 | val = 0xdeadbeef; | |
1892 | if (!read_spr(spr, &val)) { | |
1893 | printf("SPR 0x%03x (%4d) Faulted during read\n", spr, spr); | |
1894 | return; | |
1895 | } | |
1896 | ||
1897 | if (val == 0xdeadbeef) { | |
1898 | /* Looks like read was a nop, confirm */ | |
1899 | val = 0x0badcafe; | |
1900 | if (!read_spr(spr, &val)) { | |
1901 | printf("SPR 0x%03x (%4d) Faulted during read\n", spr, spr); | |
1902 | return; | |
1903 | } | |
1904 | ||
1905 | if (val == 0x0badcafe) { | |
1906 | if (show_unimplemented) | |
1907 | printf("SPR 0x%03x (%4d) Unimplemented\n", spr, spr); | |
1908 | return; | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | printf("SPR 0x%03x (%4d) = 0x%lx\n", spr, spr, val); | |
1913 | } | |
1914 | ||
9f1067c2 | 1915 | static void super_regs(void) |
1da177e4 | 1916 | { |
13629dad | 1917 | static unsigned long regno; |
1da177e4 | 1918 | int cmd; |
31cdd0c3 | 1919 | int spr; |
1da177e4 LT |
1920 | |
1921 | cmd = skipbl(); | |
31cdd0c3 PM |
1922 | |
1923 | switch (cmd) { | |
1924 | case '\n': { | |
e3bc8049 | 1925 | unsigned long sp, toc; |
1da177e4 LT |
1926 | asm("mr %0,1" : "=r" (sp) :); |
1927 | asm("mr %0,2" : "=r" (toc) :); | |
1928 | ||
56346ad8 | 1929 | printf("msr = "REG" sprg0 = "REG"\n", |
f78541dc | 1930 | mfmsr(), mfspr(SPRN_SPRG0)); |
56346ad8 | 1931 | printf("pvr = "REG" sprg1 = "REG"\n", |
e3bc8049 | 1932 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); |
56346ad8 | 1933 | printf("dec = "REG" sprg2 = "REG"\n", |
f78541dc | 1934 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); |
56346ad8 ME |
1935 | printf("sp = "REG" sprg3 = "REG"\n", sp, mfspr(SPRN_SPRG3)); |
1936 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1937 | ||
1846193b | 1938 | dump_206_sprs(); |
e0ddf7a2 | 1939 | dump_207_sprs(); |
d1e1b351 | 1940 | dump_300_sprs(); |
1846193b | 1941 | |
1da177e4 LT |
1942 | return; |
1943 | } | |
31cdd0c3 PM |
1944 | case 'w': { |
1945 | unsigned long val; | |
1946 | scanhex(®no); | |
1947 | val = 0; | |
1948 | read_spr(regno, &val); | |
1da177e4 LT |
1949 | scanhex(&val); |
1950 | write_spr(regno, val); | |
31cdd0c3 PM |
1951 | dump_one_spr(regno, true); |
1952 | break; | |
1953 | } | |
1da177e4 | 1954 | case 'r': |
31cdd0c3 PM |
1955 | scanhex(®no); |
1956 | dump_one_spr(regno, true); | |
1957 | break; | |
1958 | case 'a': | |
1959 | /* dump ALL SPRs */ | |
1960 | for (spr = 1; spr < 1024; ++spr) | |
1961 | dump_one_spr(spr, false); | |
1da177e4 | 1962 | break; |
1da177e4 | 1963 | } |
31cdd0c3 | 1964 | |
1da177e4 LT |
1965 | scannl(); |
1966 | } | |
1967 | ||
1968 | /* | |
1969 | * Stuff for reading and writing memory safely | |
1970 | */ | |
9f1067c2 | 1971 | static int |
1da177e4 LT |
1972 | mread(unsigned long adrs, void *buf, int size) |
1973 | { | |
1974 | volatile int n; | |
1975 | char *p, *q; | |
1976 | ||
1977 | n = 0; | |
1978 | if (setjmp(bus_error_jmp) == 0) { | |
1979 | catch_memory_errors = 1; | |
1980 | sync(); | |
1981 | p = (char *)adrs; | |
1982 | q = (char *)buf; | |
1983 | switch (size) { | |
1984 | case 2: | |
f78541dc | 1985 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1986 | break; |
1987 | case 4: | |
f78541dc | 1988 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1989 | break; |
1990 | case 8: | |
f78541dc | 1991 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1992 | break; |
1993 | default: | |
1994 | for( ; n < size; ++n) { | |
1995 | *q++ = *p++; | |
1996 | sync(); | |
1997 | } | |
1998 | } | |
1999 | sync(); | |
2000 | /* wait a little while to see if we get a machine check */ | |
2001 | __delay(200); | |
2002 | n = size; | |
2003 | } | |
2004 | catch_memory_errors = 0; | |
2005 | return n; | |
2006 | } | |
2007 | ||
9f1067c2 | 2008 | static int |
1da177e4 LT |
2009 | mwrite(unsigned long adrs, void *buf, int size) |
2010 | { | |
2011 | volatile int n; | |
2012 | char *p, *q; | |
2013 | ||
2014 | n = 0; | |
2015 | if (setjmp(bus_error_jmp) == 0) { | |
2016 | catch_memory_errors = 1; | |
2017 | sync(); | |
2018 | p = (char *) adrs; | |
2019 | q = (char *) buf; | |
2020 | switch (size) { | |
2021 | case 2: | |
f78541dc | 2022 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
2023 | break; |
2024 | case 4: | |
f78541dc | 2025 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
2026 | break; |
2027 | case 8: | |
f78541dc | 2028 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
2029 | break; |
2030 | default: | |
2031 | for ( ; n < size; ++n) { | |
2032 | *p++ = *q++; | |
2033 | sync(); | |
2034 | } | |
2035 | } | |
2036 | sync(); | |
2037 | /* wait a little while to see if we get a machine check */ | |
2038 | __delay(200); | |
2039 | n = size; | |
2040 | } else { | |
736256e4 | 2041 | printf("*** Error writing address "REG"\n", adrs + n); |
1da177e4 LT |
2042 | } |
2043 | catch_memory_errors = 0; | |
2044 | return n; | |
2045 | } | |
2046 | ||
2047 | static int fault_type; | |
f78541dc | 2048 | static int fault_except; |
1da177e4 LT |
2049 | static char *fault_chars[] = { "--", "**", "##" }; |
2050 | ||
f78541dc | 2051 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 2052 | { |
f78541dc | 2053 | fault_except = TRAP(regs); |
1da177e4 LT |
2054 | switch (TRAP(regs)) { |
2055 | case 0x200: | |
2056 | fault_type = 0; | |
2057 | break; | |
2058 | case 0x300: | |
2059 | case 0x380: | |
2060 | fault_type = 1; | |
2061 | break; | |
2062 | default: | |
2063 | fault_type = 2; | |
2064 | } | |
2065 | ||
2066 | longjmp(bus_error_jmp, 1); | |
2067 | ||
2068 | return 0; | |
2069 | } | |
2070 | ||
2071 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
2072 | ||
9f1067c2 | 2073 | static void |
1da177e4 LT |
2074 | byterev(unsigned char *val, int size) |
2075 | { | |
2076 | int t; | |
2077 | ||
2078 | switch (size) { | |
2079 | case 2: | |
2080 | SWAP(val[0], val[1], t); | |
2081 | break; | |
2082 | case 4: | |
2083 | SWAP(val[0], val[3], t); | |
2084 | SWAP(val[1], val[2], t); | |
2085 | break; | |
2086 | case 8: /* is there really any use for this? */ | |
2087 | SWAP(val[0], val[7], t); | |
2088 | SWAP(val[1], val[6], t); | |
2089 | SWAP(val[2], val[5], t); | |
2090 | SWAP(val[3], val[4], t); | |
2091 | break; | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | static int brev; | |
2096 | static int mnoread; | |
2097 | ||
e3bc8049 | 2098 | static char *memex_help_string = |
1da177e4 LT |
2099 | "Memory examine command usage:\n" |
2100 | "m [addr] [flags] examine/change memory\n" | |
2101 | " addr is optional. will start where left off.\n" | |
2102 | " flags may include chars from this set:\n" | |
2103 | " b modify by bytes (default)\n" | |
2104 | " w modify by words (2 byte)\n" | |
2105 | " l modify by longs (4 byte)\n" | |
2106 | " d modify by doubleword (8 byte)\n" | |
2107 | " r toggle reverse byte order mode\n" | |
2108 | " n do not read memory (for i/o spaces)\n" | |
2109 | " . ok to read (default)\n" | |
2110 | "NOTE: flags are saved as defaults\n" | |
2111 | ""; | |
2112 | ||
e3bc8049 | 2113 | static char *memex_subcmd_help_string = |
1da177e4 LT |
2114 | "Memory examine subcommands:\n" |
2115 | " hexval write this val to current location\n" | |
2116 | " 'string' write chars from string to this location\n" | |
2117 | " ' increment address\n" | |
2118 | " ^ decrement address\n" | |
2119 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
2120 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
2121 | " ` clear no-read flag\n" | |
2122 | " ; stay at this addr\n" | |
2123 | " v change to byte mode\n" | |
2124 | " w change to word (2 byte) mode\n" | |
2125 | " l change to long (4 byte) mode\n" | |
2126 | " u change to doubleword (8 byte) mode\n" | |
2127 | " m addr change current addr\n" | |
2128 | " n toggle no-read flag\n" | |
2129 | " r toggle byte reverse flag\n" | |
2130 | " < count back up count bytes\n" | |
2131 | " > count skip forward count bytes\n" | |
2132 | " x exit this mode\n" | |
2133 | ""; | |
2134 | ||
9f1067c2 | 2135 | static void |
1da177e4 LT |
2136 | memex(void) |
2137 | { | |
2138 | int cmd, inc, i, nslash; | |
2139 | unsigned long n; | |
2140 | unsigned char val[16]; | |
2141 | ||
2142 | scanhex((void *)&adrs); | |
2143 | cmd = skipbl(); | |
2144 | if (cmd == '?') { | |
2145 | printf(memex_help_string); | |
2146 | return; | |
2147 | } else { | |
2148 | termch = cmd; | |
2149 | } | |
2150 | last_cmd = "m\n"; | |
2151 | while ((cmd = skipbl()) != '\n') { | |
2152 | switch( cmd ){ | |
2153 | case 'b': size = 1; break; | |
2154 | case 'w': size = 2; break; | |
2155 | case 'l': size = 4; break; | |
2156 | case 'd': size = 8; break; | |
2157 | case 'r': brev = !brev; break; | |
2158 | case 'n': mnoread = 1; break; | |
2159 | case '.': mnoread = 0; break; | |
2160 | } | |
2161 | } | |
2162 | if( size <= 0 ) | |
2163 | size = 1; | |
2164 | else if( size > 8 ) | |
2165 | size = 8; | |
2166 | for(;;){ | |
2167 | if (!mnoread) | |
2168 | n = mread(adrs, val, size); | |
e1449ed9 | 2169 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
2170 | if (!mnoread) { |
2171 | if (brev) | |
2172 | byterev(val, size); | |
2173 | putchar(' '); | |
2174 | for (i = 0; i < n; ++i) | |
2175 | printf("%.2x", val[i]); | |
2176 | for (; i < size; ++i) | |
2177 | printf("%s", fault_chars[fault_type]); | |
2178 | } | |
2179 | putchar(' '); | |
2180 | inc = size; | |
2181 | nslash = 0; | |
2182 | for(;;){ | |
2183 | if( scanhex(&n) ){ | |
2184 | for (i = 0; i < size; ++i) | |
2185 | val[i] = n >> (i * 8); | |
2186 | if (!brev) | |
2187 | byterev(val, size); | |
2188 | mwrite(adrs, val, size); | |
2189 | inc = size; | |
2190 | } | |
2191 | cmd = skipbl(); | |
2192 | if (cmd == '\n') | |
2193 | break; | |
2194 | inc = 0; | |
2195 | switch (cmd) { | |
2196 | case '\'': | |
2197 | for(;;){ | |
2198 | n = inchar(); | |
2199 | if( n == '\\' ) | |
2200 | n = bsesc(); | |
2201 | else if( n == '\'' ) | |
2202 | break; | |
2203 | for (i = 0; i < size; ++i) | |
2204 | val[i] = n >> (i * 8); | |
2205 | if (!brev) | |
2206 | byterev(val, size); | |
2207 | mwrite(adrs, val, size); | |
2208 | adrs += size; | |
2209 | } | |
2210 | adrs -= size; | |
2211 | inc = size; | |
2212 | break; | |
2213 | case ',': | |
2214 | adrs += size; | |
2215 | break; | |
2216 | case '.': | |
2217 | mnoread = 0; | |
2218 | break; | |
2219 | case ';': | |
2220 | break; | |
2221 | case 'x': | |
2222 | case EOF: | |
2223 | scannl(); | |
2224 | return; | |
2225 | case 'b': | |
2226 | case 'v': | |
2227 | size = 1; | |
2228 | break; | |
2229 | case 'w': | |
2230 | size = 2; | |
2231 | break; | |
2232 | case 'l': | |
2233 | size = 4; | |
2234 | break; | |
2235 | case 'u': | |
2236 | size = 8; | |
2237 | break; | |
2238 | case '^': | |
2239 | adrs -= size; | |
2240 | break; | |
1da177e4 LT |
2241 | case '/': |
2242 | if (nslash > 0) | |
2243 | adrs -= 1 << nslash; | |
2244 | else | |
2245 | nslash = 0; | |
2246 | nslash += 4; | |
2247 | adrs += 1 << nslash; | |
2248 | break; | |
2249 | case '\\': | |
2250 | if (nslash < 0) | |
2251 | adrs += 1 << -nslash; | |
2252 | else | |
2253 | nslash = 0; | |
2254 | nslash -= 4; | |
2255 | adrs -= 1 << -nslash; | |
2256 | break; | |
2257 | case 'm': | |
2258 | scanhex((void *)&adrs); | |
2259 | break; | |
2260 | case 'n': | |
2261 | mnoread = 1; | |
2262 | break; | |
2263 | case 'r': | |
2264 | brev = !brev; | |
2265 | break; | |
2266 | case '<': | |
2267 | n = size; | |
2268 | scanhex(&n); | |
2269 | adrs -= n; | |
2270 | break; | |
2271 | case '>': | |
2272 | n = size; | |
2273 | scanhex(&n); | |
2274 | adrs += n; | |
2275 | break; | |
2276 | case '?': | |
2277 | printf(memex_subcmd_help_string); | |
2278 | break; | |
2279 | } | |
2280 | } | |
2281 | adrs += inc; | |
2282 | } | |
2283 | } | |
2284 | ||
9f1067c2 | 2285 | static int |
1da177e4 LT |
2286 | bsesc(void) |
2287 | { | |
2288 | int c; | |
2289 | ||
2290 | c = inchar(); | |
2291 | switch( c ){ | |
2292 | case 'n': c = '\n'; break; | |
2293 | case 'r': c = '\r'; break; | |
2294 | case 'b': c = '\b'; break; | |
2295 | case 't': c = '\t'; break; | |
2296 | } | |
2297 | return c; | |
2298 | } | |
2299 | ||
7e5b5938 OH |
2300 | static void xmon_rawdump (unsigned long adrs, long ndump) |
2301 | { | |
2302 | long n, m, r, nr; | |
2303 | unsigned char temp[16]; | |
2304 | ||
2305 | for (n = ndump; n > 0;) { | |
2306 | r = n < 16? n: 16; | |
2307 | nr = mread(adrs, temp, r); | |
2308 | adrs += nr; | |
2309 | for (m = 0; m < r; ++m) { | |
2310 | if (m < nr) | |
2311 | printf("%.2x", temp[m]); | |
2312 | else | |
2313 | printf("%s", fault_chars[fault_type]); | |
2314 | } | |
2315 | n -= r; | |
2316 | if (nr < r) | |
2317 | break; | |
2318 | } | |
2319 | printf("\n"); | |
2320 | } | |
2321 | ||
4125d012 BL |
2322 | static void dump_tracing(void) |
2323 | { | |
2324 | int c; | |
2325 | ||
2326 | c = inchar(); | |
2327 | if (c == 'c') | |
2328 | ftrace_dump(DUMP_ORIG); | |
2329 | else | |
2330 | ftrace_dump(DUMP_ALL); | |
4125d012 BL |
2331 | } |
2332 | ||
ddadb6b8 ME |
2333 | #ifdef CONFIG_PPC64 |
2334 | static void dump_one_paca(int cpu) | |
2335 | { | |
2336 | struct paca_struct *p; | |
4e003747 | 2337 | #ifdef CONFIG_PPC_BOOK3S_64 |
ad987fc8 ME |
2338 | int i = 0; |
2339 | #endif | |
ddadb6b8 ME |
2340 | |
2341 | if (setjmp(bus_error_jmp) != 0) { | |
2342 | printf("*** Error dumping paca for cpu 0x%x!\n", cpu); | |
2343 | return; | |
2344 | } | |
2345 | ||
2346 | catch_memory_errors = 1; | |
2347 | sync(); | |
2348 | ||
d2e60075 | 2349 | p = paca_ptrs[cpu]; |
ddadb6b8 | 2350 | |
d8104182 | 2351 | printf("paca for cpu 0x%x @ %px:\n", cpu, p); |
ddadb6b8 | 2352 | |
9ce53e27 ME |
2353 | printf(" %-*s = %s\n", 25, "possible", cpu_possible(cpu) ? "yes" : "no"); |
2354 | printf(" %-*s = %s\n", 25, "present", cpu_present(cpu) ? "yes" : "no"); | |
2355 | printf(" %-*s = %s\n", 25, "online", cpu_online(cpu) ? "yes" : "no"); | |
ddadb6b8 | 2356 | |
6671683d | 2357 | #define DUMP(paca, name, format) \ |
9ce53e27 | 2358 | printf(" %-*s = "format"\t(0x%lx)\n", 25, #name, 18, paca->name, \ |
ddadb6b8 ME |
2359 | offsetof(struct paca_struct, name)); |
2360 | ||
6671683d ME |
2361 | DUMP(p, lock_token, "%#-*x"); |
2362 | DUMP(p, paca_index, "%#-*x"); | |
e70d8f55 MM |
2363 | DUMP(p, kernel_toc, "%#-*llx"); |
2364 | DUMP(p, kernelbase, "%#-*llx"); | |
2365 | DUMP(p, kernel_msr, "%#-*llx"); | |
6671683d | 2366 | DUMP(p, emergency_sp, "%-*px"); |
729b0f71 | 2367 | #ifdef CONFIG_PPC_BOOK3S_64 |
6671683d ME |
2368 | DUMP(p, nmi_emergency_sp, "%-*px"); |
2369 | DUMP(p, mc_emergency_sp, "%-*px"); | |
2370 | DUMP(p, in_nmi, "%#-*x"); | |
2371 | DUMP(p, in_mce, "%#-*x"); | |
2372 | DUMP(p, hmi_event_available, "%#-*x"); | |
729b0f71 | 2373 | #endif |
e70d8f55 | 2374 | DUMP(p, data_offset, "%#-*llx"); |
6671683d ME |
2375 | DUMP(p, hw_cpu_id, "%#-*x"); |
2376 | DUMP(p, cpu_start, "%#-*x"); | |
2377 | DUMP(p, kexec_state, "%#-*x"); | |
4e003747 | 2378 | #ifdef CONFIG_PPC_BOOK3S_64 |
ad987fc8 ME |
2379 | for (i = 0; i < SLB_NUM_BOLTED; i++) { |
2380 | u64 esid, vsid; | |
2381 | ||
2382 | if (!p->slb_shadow_ptr) | |
2383 | continue; | |
2384 | ||
2385 | esid = be64_to_cpu(p->slb_shadow_ptr->save_area[i].esid); | |
2386 | vsid = be64_to_cpu(p->slb_shadow_ptr->save_area[i].vsid); | |
2387 | ||
2388 | if (esid || vsid) { | |
9ce53e27 ME |
2389 | printf(" %-*s[%d] = 0x%016llx 0x%016llx\n", |
2390 | 22, "slb_shadow", i, esid, vsid); | |
ad987fc8 ME |
2391 | } |
2392 | } | |
6671683d ME |
2393 | DUMP(p, vmalloc_sllp, "%#-*x"); |
2394 | DUMP(p, slb_cache_ptr, "%#-*x"); | |
ad987fc8 | 2395 | for (i = 0; i < SLB_CACHE_ENTRIES; i++) |
9ce53e27 ME |
2396 | printf(" %-*s[%d] = 0x%016x\n", |
2397 | 22, "slb_cache", i, p->slb_cache[i]); | |
274920a3 | 2398 | |
6671683d | 2399 | DUMP(p, rfi_flush_fallback_area, "%-*px"); |
ad987fc8 | 2400 | #endif |
6671683d | 2401 | DUMP(p, dscr_default, "%#-*llx"); |
ad987fc8 | 2402 | #ifdef CONFIG_PPC_BOOK3E |
6671683d ME |
2403 | DUMP(p, pgd, "%-*px"); |
2404 | DUMP(p, kernel_pgd, "%-*px"); | |
2405 | DUMP(p, tcd_ptr, "%-*px"); | |
2406 | DUMP(p, mc_kstack, "%-*px"); | |
2407 | DUMP(p, crit_kstack, "%-*px"); | |
2408 | DUMP(p, dbg_kstack, "%-*px"); | |
ad987fc8 | 2409 | #endif |
6671683d | 2410 | DUMP(p, __current, "%-*px"); |
e70d8f55 | 2411 | DUMP(p, kstack, "%#-*llx"); |
9ce53e27 | 2412 | printf(" %-*s = 0x%016llx\n", 25, "kstack_base", p->kstack & ~(THREAD_SIZE - 1)); |
e70d8f55 MM |
2413 | DUMP(p, stab_rr, "%#-*llx"); |
2414 | DUMP(p, saved_r1, "%#-*llx"); | |
6671683d ME |
2415 | DUMP(p, trap_save, "%#-*x"); |
2416 | DUMP(p, irq_soft_mask, "%#-*x"); | |
2417 | DUMP(p, irq_happened, "%#-*x"); | |
2418 | DUMP(p, io_sync, "%#-*x"); | |
2419 | DUMP(p, irq_work_pending, "%#-*x"); | |
2420 | DUMP(p, nap_state_lost, "%#-*x"); | |
2421 | DUMP(p, sprg_vdso, "%#-*llx"); | |
ad987fc8 ME |
2422 | |
2423 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM | |
6671683d | 2424 | DUMP(p, tm_scratch, "%#-*llx"); |
ad987fc8 ME |
2425 | #endif |
2426 | ||
2427 | #ifdef CONFIG_PPC_POWERNV | |
6671683d ME |
2428 | DUMP(p, core_idle_state_ptr, "%-*px"); |
2429 | DUMP(p, thread_idle_state, "%#-*x"); | |
2430 | DUMP(p, thread_mask, "%#-*x"); | |
2431 | DUMP(p, subcore_sibling_mask, "%#-*x"); | |
2e0986d7 ME |
2432 | DUMP(p, thread_sibling_pacas, "%-*px"); |
2433 | DUMP(p, requested_psscr, "%#-*llx"); | |
2434 | DUMP(p, stop_sprs.pid, "%#-*llx"); | |
2435 | DUMP(p, stop_sprs.ldbar, "%#-*llx"); | |
2436 | DUMP(p, stop_sprs.fscr, "%#-*llx"); | |
2437 | DUMP(p, stop_sprs.hfscr, "%#-*llx"); | |
2438 | DUMP(p, stop_sprs.mmcr1, "%#-*llx"); | |
2439 | DUMP(p, stop_sprs.mmcr2, "%#-*llx"); | |
2440 | DUMP(p, stop_sprs.mmcra, "%#-*llx"); | |
2441 | DUMP(p, dont_stop.counter, "%#-*x"); | |
ad987fc8 | 2442 | #endif |
ddadb6b8 | 2443 | |
e70d8f55 MM |
2444 | DUMP(p, accounting.utime, "%#-*lx"); |
2445 | DUMP(p, accounting.stime, "%#-*lx"); | |
2446 | DUMP(p, accounting.utime_scaled, "%#-*lx"); | |
2447 | DUMP(p, accounting.starttime, "%#-*lx"); | |
2448 | DUMP(p, accounting.starttime_user, "%#-*lx"); | |
2449 | DUMP(p, accounting.startspurr, "%#-*lx"); | |
2450 | DUMP(p, accounting.utime_sspurr, "%#-*lx"); | |
2451 | DUMP(p, accounting.steal_time, "%#-*lx"); | |
ddadb6b8 ME |
2452 | #undef DUMP |
2453 | ||
2454 | catch_memory_errors = 0; | |
2455 | sync(); | |
2456 | } | |
2457 | ||
2458 | static void dump_all_pacas(void) | |
2459 | { | |
2460 | int cpu; | |
2461 | ||
2462 | if (num_possible_cpus() == 0) { | |
2463 | printf("No possible cpus, use 'dp #' to dump individual cpus\n"); | |
2464 | return; | |
2465 | } | |
2466 | ||
2467 | for_each_possible_cpu(cpu) | |
2468 | dump_one_paca(cpu); | |
2469 | } | |
2470 | ||
2471 | static void dump_pacas(void) | |
2472 | { | |
2473 | unsigned long num; | |
2474 | int c; | |
2475 | ||
2476 | c = inchar(); | |
2477 | if (c == 'a') { | |
2478 | dump_all_pacas(); | |
2479 | return; | |
2480 | } | |
2481 | ||
2482 | termch = c; /* Put c back, it wasn't 'a' */ | |
2483 | ||
2484 | if (scanhex(&num)) | |
2485 | dump_one_paca(num); | |
2486 | else | |
2487 | dump_one_paca(xmon_owner); | |
2488 | } | |
2489 | #endif | |
2490 | ||
243e2511 BH |
2491 | #ifdef CONFIG_PPC_POWERNV |
2492 | static void dump_one_xive(int cpu) | |
2493 | { | |
2494 | unsigned int hwid = get_hard_smp_processor_id(cpu); | |
2495 | ||
2496 | opal_xive_dump(XIVE_DUMP_TM_HYP, hwid); | |
2497 | opal_xive_dump(XIVE_DUMP_TM_POOL, hwid); | |
2498 | opal_xive_dump(XIVE_DUMP_TM_OS, hwid); | |
2499 | opal_xive_dump(XIVE_DUMP_TM_USER, hwid); | |
2500 | opal_xive_dump(XIVE_DUMP_VP, hwid); | |
2501 | opal_xive_dump(XIVE_DUMP_EMU_STATE, hwid); | |
2502 | ||
2503 | if (setjmp(bus_error_jmp) != 0) { | |
2504 | catch_memory_errors = 0; | |
2505 | printf("*** Error dumping xive on cpu %d\n", cpu); | |
2506 | return; | |
2507 | } | |
2508 | ||
2509 | catch_memory_errors = 1; | |
2510 | sync(); | |
2511 | xmon_xive_do_dump(cpu); | |
2512 | sync(); | |
2513 | __delay(200); | |
2514 | catch_memory_errors = 0; | |
2515 | } | |
2516 | ||
2517 | static void dump_all_xives(void) | |
2518 | { | |
2519 | int cpu; | |
2520 | ||
2521 | if (num_possible_cpus() == 0) { | |
2522 | printf("No possible cpus, use 'dx #' to dump individual cpus\n"); | |
2523 | return; | |
2524 | } | |
2525 | ||
2526 | for_each_possible_cpu(cpu) | |
2527 | dump_one_xive(cpu); | |
2528 | } | |
2529 | ||
2530 | static void dump_one_xive_irq(u32 num) | |
2531 | { | |
2532 | s64 rc; | |
2533 | __be64 vp; | |
2534 | u8 prio; | |
2535 | __be32 lirq; | |
2536 | ||
2537 | rc = opal_xive_get_irq_config(num, &vp, &prio, &lirq); | |
2538 | xmon_printf("IRQ 0x%x config: vp=0x%llx prio=%d lirq=0x%x (rc=%lld)\n", | |
2539 | num, be64_to_cpu(vp), prio, be32_to_cpu(lirq), rc); | |
2540 | } | |
2541 | ||
2542 | static void dump_xives(void) | |
2543 | { | |
2544 | unsigned long num; | |
2545 | int c; | |
2546 | ||
402e172a BL |
2547 | if (!xive_enabled()) { |
2548 | printf("Xive disabled on this system\n"); | |
2549 | return; | |
2550 | } | |
2551 | ||
243e2511 BH |
2552 | c = inchar(); |
2553 | if (c == 'a') { | |
2554 | dump_all_xives(); | |
2555 | return; | |
2556 | } else if (c == 'i') { | |
2557 | if (scanhex(&num)) | |
2558 | dump_one_xive_irq(num); | |
2559 | return; | |
2560 | } | |
2561 | ||
2562 | termch = c; /* Put c back, it wasn't 'a' */ | |
2563 | ||
2564 | if (scanhex(&num)) | |
2565 | dump_one_xive(num); | |
2566 | else | |
2567 | dump_one_xive(xmon_owner); | |
2568 | } | |
2569 | #endif /* CONFIG_PPC_POWERNV */ | |
2570 | ||
5e48dc0a DM |
2571 | static void dump_by_size(unsigned long addr, long count, int size) |
2572 | { | |
2573 | unsigned char temp[16]; | |
2574 | int i, j; | |
2575 | u64 val; | |
2576 | ||
2577 | count = ALIGN(count, 16); | |
2578 | ||
2579 | for (i = 0; i < count; i += 16, addr += 16) { | |
2580 | printf(REG, addr); | |
2581 | ||
2582 | if (mread(addr, temp, 16) != 16) { | |
2583 | printf("\nFaulted reading %d bytes from 0x"REG"\n", 16, addr); | |
2584 | return; | |
2585 | } | |
2586 | ||
2587 | for (j = 0; j < 16; j += size) { | |
2588 | putchar(' '); | |
2589 | switch (size) { | |
2590 | case 1: val = temp[j]; break; | |
2591 | case 2: val = *(u16 *)&temp[j]; break; | |
2592 | case 4: val = *(u32 *)&temp[j]; break; | |
2593 | case 8: val = *(u64 *)&temp[j]; break; | |
2594 | default: val = 0; | |
2595 | } | |
2596 | ||
e70d8f55 | 2597 | printf("%0*llx", size * 2, val); |
5e48dc0a DM |
2598 | } |
2599 | printf("\n"); | |
2600 | } | |
2601 | } | |
2602 | ||
9f1067c2 | 2603 | static void |
1da177e4 LT |
2604 | dump(void) |
2605 | { | |
5e48dc0a | 2606 | static char last[] = { "d?\n" }; |
1da177e4 LT |
2607 | int c; |
2608 | ||
2609 | c = inchar(); | |
ddadb6b8 ME |
2610 | |
2611 | #ifdef CONFIG_PPC64 | |
2612 | if (c == 'p') { | |
958b7c80 | 2613 | xmon_start_pagination(); |
ddadb6b8 | 2614 | dump_pacas(); |
958b7c80 | 2615 | xmon_end_pagination(); |
ddadb6b8 ME |
2616 | return; |
2617 | } | |
2618 | #endif | |
243e2511 BH |
2619 | #ifdef CONFIG_PPC_POWERNV |
2620 | if (c == 'x') { | |
2621 | xmon_start_pagination(); | |
2622 | dump_xives(); | |
2623 | xmon_end_pagination(); | |
2624 | return; | |
2625 | } | |
2626 | #endif | |
ddadb6b8 | 2627 | |
4125d012 BL |
2628 | if (c == 't') { |
2629 | dump_tracing(); | |
2630 | return; | |
2631 | } | |
2632 | ||
5e48dc0a | 2633 | if (c == '\n') |
1da177e4 | 2634 | termch = c; |
5e48dc0a | 2635 | |
1da177e4 LT |
2636 | scanhex((void *)&adrs); |
2637 | if (termch != '\n') | |
2638 | termch = 0; | |
2639 | if (c == 'i') { | |
2640 | scanhex(&nidump); | |
2641 | if (nidump == 0) | |
2642 | nidump = 16; | |
2643 | else if (nidump > MAX_DUMP) | |
2644 | nidump = MAX_DUMP; | |
2645 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
2646 | last_cmd = "di\n"; | |
f312deb4 VS |
2647 | } else if (c == 'l') { |
2648 | dump_log_buf(); | |
fde93a0f AD |
2649 | } else if (c == 'o') { |
2650 | dump_opal_msglog(); | |
80eff6c4 BS |
2651 | } else if (c == 'v') { |
2652 | /* dump virtual to physical translation */ | |
2653 | show_pte(adrs); | |
7e5b5938 OH |
2654 | } else if (c == 'r') { |
2655 | scanhex(&ndump); | |
2656 | if (ndump == 0) | |
2657 | ndump = 64; | |
2658 | xmon_rawdump(adrs, ndump); | |
2659 | adrs += ndump; | |
2660 | last_cmd = "dr\n"; | |
1da177e4 LT |
2661 | } else { |
2662 | scanhex(&ndump); | |
2663 | if (ndump == 0) | |
2664 | ndump = 64; | |
2665 | else if (ndump > MAX_DUMP) | |
2666 | ndump = MAX_DUMP; | |
5e48dc0a DM |
2667 | |
2668 | switch (c) { | |
2669 | case '8': | |
2670 | case '4': | |
2671 | case '2': | |
2672 | case '1': | |
2673 | ndump = ALIGN(ndump, 16); | |
2674 | dump_by_size(adrs, ndump, c - '0'); | |
2675 | last[1] = c; | |
2676 | last_cmd = last; | |
2677 | break; | |
2678 | default: | |
2679 | prdump(adrs, ndump); | |
2680 | last_cmd = "d\n"; | |
2681 | } | |
2682 | ||
1da177e4 | 2683 | adrs += ndump; |
1da177e4 LT |
2684 | } |
2685 | } | |
2686 | ||
9f1067c2 | 2687 | static void |
1da177e4 LT |
2688 | prdump(unsigned long adrs, long ndump) |
2689 | { | |
2690 | long n, m, c, r, nr; | |
2691 | unsigned char temp[16]; | |
2692 | ||
2693 | for (n = ndump; n > 0;) { | |
f78541dc | 2694 | printf(REG, adrs); |
1da177e4 LT |
2695 | putchar(' '); |
2696 | r = n < 16? n: 16; | |
2697 | nr = mread(adrs, temp, r); | |
2698 | adrs += nr; | |
2699 | for (m = 0; m < r; ++m) { | |
e3bc8049 | 2700 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
e1449ed9 | 2701 | putchar(' '); |
1da177e4 LT |
2702 | if (m < nr) |
2703 | printf("%.2x", temp[m]); | |
2704 | else | |
2705 | printf("%s", fault_chars[fault_type]); | |
2706 | } | |
e1449ed9 | 2707 | for (; m < 16; ++m) { |
e3bc8049 | 2708 | if ((m & (sizeof(long) - 1)) == 0) |
e1449ed9 | 2709 | putchar(' '); |
1da177e4 | 2710 | printf(" "); |
e1449ed9 | 2711 | } |
1da177e4 LT |
2712 | printf(" |"); |
2713 | for (m = 0; m < r; ++m) { | |
2714 | if (m < nr) { | |
2715 | c = temp[m]; | |
2716 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2717 | } else | |
2718 | putchar(' '); | |
2719 | } | |
2720 | n -= r; | |
2721 | for (; m < 16; ++m) | |
2722 | putchar(' '); | |
2723 | printf("|\n"); | |
2724 | if (nr < r) | |
2725 | break; | |
2726 | } | |
2727 | } | |
2728 | ||
4c4c8723 ME |
2729 | typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr); |
2730 | ||
9f1067c2 | 2731 | static int |
4c4c8723 ME |
2732 | generic_inst_dump(unsigned long adr, long count, int praddr, |
2733 | instruction_dump_func dump_func) | |
1da177e4 LT |
2734 | { |
2735 | int nr, dotted; | |
2736 | unsigned long first_adr; | |
2737 | unsigned long inst, last_inst = 0; | |
2738 | unsigned char val[4]; | |
2739 | ||
2740 | dotted = 0; | |
2741 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2742 | nr = mread(adr, val, 4); | |
2743 | if (nr == 0) { | |
2744 | if (praddr) { | |
2745 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2746 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2747 | } |
2748 | break; | |
2749 | } | |
2750 | inst = GETWORD(val); | |
2751 | if (adr > first_adr && inst == last_inst) { | |
2752 | if (!dotted) { | |
2753 | printf(" ...\n"); | |
2754 | dotted = 1; | |
2755 | } | |
2756 | continue; | |
2757 | } | |
2758 | dotted = 0; | |
2759 | last_inst = inst; | |
2760 | if (praddr) | |
e70d8f55 | 2761 | printf(REG" %.8lx", adr, inst); |
1da177e4 | 2762 | printf("\t"); |
4c4c8723 | 2763 | dump_func(inst, adr); |
1da177e4 LT |
2764 | printf("\n"); |
2765 | } | |
2766 | return adr - first_adr; | |
2767 | } | |
2768 | ||
9f1067c2 | 2769 | static int |
4c4c8723 ME |
2770 | ppc_inst_dump(unsigned long adr, long count, int praddr) |
2771 | { | |
2772 | return generic_inst_dump(adr, count, praddr, print_insn_powerpc); | |
2773 | } | |
2774 | ||
1da177e4 LT |
2775 | void |
2776 | print_address(unsigned long addr) | |
2777 | { | |
2778 | xmon_print_symbol(addr, "\t# ", ""); | |
2779 | } | |
2780 | ||
f312deb4 VS |
2781 | void |
2782 | dump_log_buf(void) | |
2783 | { | |
ca5dd395 ME |
2784 | struct kmsg_dumper dumper = { .active = 1 }; |
2785 | unsigned char buf[128]; | |
2786 | size_t len; | |
f312deb4 | 2787 | |
e3bc8049 | 2788 | if (setjmp(bus_error_jmp) != 0) { |
ca5dd395 | 2789 | printf("Error dumping printk buffer!\n"); |
e3bc8049 ME |
2790 | return; |
2791 | } | |
f312deb4 | 2792 | |
e3bc8049 ME |
2793 | catch_memory_errors = 1; |
2794 | sync(); | |
f312deb4 | 2795 | |
ca5dd395 | 2796 | kmsg_dump_rewind_nolock(&dumper); |
0c23a88c | 2797 | xmon_start_pagination(); |
ca5dd395 ME |
2798 | while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) { |
2799 | buf[len] = '\0'; | |
2800 | printf("%s", buf); | |
2801 | } | |
0c23a88c | 2802 | xmon_end_pagination(); |
f312deb4 | 2803 | |
e3bc8049 ME |
2804 | sync(); |
2805 | /* wait a little while to see if we get a machine check */ | |
2806 | __delay(200); | |
2807 | catch_memory_errors = 0; | |
f312deb4 | 2808 | } |
1da177e4 | 2809 | |
fde93a0f AD |
2810 | #ifdef CONFIG_PPC_POWERNV |
2811 | static void dump_opal_msglog(void) | |
2812 | { | |
2813 | unsigned char buf[128]; | |
2814 | ssize_t res; | |
2815 | loff_t pos = 0; | |
2816 | ||
2817 | if (!firmware_has_feature(FW_FEATURE_OPAL)) { | |
2818 | printf("Machine is not running OPAL firmware.\n"); | |
2819 | return; | |
2820 | } | |
2821 | ||
2822 | if (setjmp(bus_error_jmp) != 0) { | |
2823 | printf("Error dumping OPAL msglog!\n"); | |
2824 | return; | |
2825 | } | |
2826 | ||
2827 | catch_memory_errors = 1; | |
2828 | sync(); | |
2829 | ||
2830 | xmon_start_pagination(); | |
2831 | while ((res = opal_msglog_copy(buf, pos, sizeof(buf) - 1))) { | |
2832 | if (res < 0) { | |
2833 | printf("Error dumping OPAL msglog! Error: %zd\n", res); | |
2834 | break; | |
2835 | } | |
2836 | buf[res] = '\0'; | |
2837 | printf("%s", buf); | |
2838 | pos += res; | |
2839 | } | |
2840 | xmon_end_pagination(); | |
2841 | ||
2842 | sync(); | |
2843 | /* wait a little while to see if we get a machine check */ | |
2844 | __delay(200); | |
2845 | catch_memory_errors = 0; | |
2846 | } | |
2847 | #endif | |
2848 | ||
1da177e4 LT |
2849 | /* |
2850 | * Memory operations - move, set, print differences | |
2851 | */ | |
2852 | static unsigned long mdest; /* destination address */ | |
2853 | static unsigned long msrc; /* source address */ | |
2854 | static unsigned long mval; /* byte value to set memory to */ | |
2855 | static unsigned long mcount; /* # bytes to affect */ | |
2856 | static unsigned long mdiffs; /* max # differences to print */ | |
2857 | ||
9f1067c2 | 2858 | static void |
1da177e4 LT |
2859 | memops(int cmd) |
2860 | { | |
2861 | scanhex((void *)&mdest); | |
2862 | if( termch != '\n' ) | |
2863 | termch = 0; | |
2864 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2865 | if( termch != '\n' ) | |
2866 | termch = 0; | |
2867 | scanhex((void *)&mcount); | |
2868 | switch( cmd ){ | |
2869 | case 'm': | |
2870 | memmove((void *)mdest, (void *)msrc, mcount); | |
2871 | break; | |
2872 | case 's': | |
2873 | memset((void *)mdest, mval, mcount); | |
2874 | break; | |
2875 | case 'd': | |
2876 | if( termch != '\n' ) | |
2877 | termch = 0; | |
2878 | scanhex((void *)&mdiffs); | |
2879 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2880 | break; | |
2881 | } | |
2882 | } | |
2883 | ||
9f1067c2 | 2884 | static void |
1da177e4 LT |
2885 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) |
2886 | { | |
2887 | unsigned n, prt; | |
2888 | ||
2889 | prt = 0; | |
2890 | for( n = nb; n > 0; --n ) | |
2891 | if( *p1++ != *p2++ ) | |
2892 | if( ++prt <= maxpr ) | |
e70d8f55 | 2893 | printf("%px %.2x # %px %.2x\n", p1 - 1, |
1da177e4 LT |
2894 | p1[-1], p2 - 1, p2[-1]); |
2895 | if( prt > maxpr ) | |
2896 | printf("Total of %d differences\n", prt); | |
2897 | } | |
2898 | ||
2899 | static unsigned mend; | |
2900 | static unsigned mask; | |
2901 | ||
9f1067c2 | 2902 | static void |
1da177e4 LT |
2903 | memlocate(void) |
2904 | { | |
2905 | unsigned a, n; | |
2906 | unsigned char val[4]; | |
2907 | ||
2908 | last_cmd = "ml"; | |
2909 | scanhex((void *)&mdest); | |
2910 | if (termch != '\n') { | |
2911 | termch = 0; | |
2912 | scanhex((void *)&mend); | |
2913 | if (termch != '\n') { | |
2914 | termch = 0; | |
2915 | scanhex((void *)&mval); | |
2916 | mask = ~0; | |
2917 | if (termch != '\n') termch = 0; | |
2918 | scanhex((void *)&mask); | |
2919 | } | |
2920 | } | |
2921 | n = 0; | |
2922 | for (a = mdest; a < mend; a += 4) { | |
2923 | if (mread(a, val, 4) == 4 | |
2924 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2925 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2926 | if (++n >= 10) | |
2927 | break; | |
2928 | } | |
2929 | } | |
2930 | } | |
2931 | ||
2932 | static unsigned long mskip = 0x1000; | |
2933 | static unsigned long mlim = 0xffffffff; | |
2934 | ||
9f1067c2 | 2935 | static void |
1da177e4 LT |
2936 | memzcan(void) |
2937 | { | |
2938 | unsigned char v; | |
2939 | unsigned a; | |
2940 | int ok, ook; | |
2941 | ||
2942 | scanhex(&mdest); | |
2943 | if (termch != '\n') termch = 0; | |
2944 | scanhex(&mskip); | |
2945 | if (termch != '\n') termch = 0; | |
2946 | scanhex(&mlim); | |
2947 | ook = 0; | |
2948 | for (a = mdest; a < mlim; a += mskip) { | |
2949 | ok = mread(a, &v, 1); | |
2950 | if (ok && !ook) { | |
2951 | printf("%.8x .. ", a); | |
1da177e4 | 2952 | } else if (!ok && ook) |
e70d8f55 | 2953 | printf("%.8lx\n", a - mskip); |
1da177e4 LT |
2954 | ook = ok; |
2955 | if (a + mskip < a) | |
2956 | break; | |
2957 | } | |
2958 | if (ook) | |
e70d8f55 | 2959 | printf("%.8lx\n", a - mskip); |
1da177e4 LT |
2960 | } |
2961 | ||
6dfb5404 DM |
2962 | static void show_task(struct task_struct *tsk) |
2963 | { | |
2964 | char state; | |
2965 | ||
2966 | /* | |
2967 | * Cloned from kdb_task_state_char(), which is not entirely | |
2968 | * appropriate for calling from xmon. This could be moved | |
2969 | * to a common, generic, routine used by both. | |
2970 | */ | |
2971 | state = (tsk->state == 0) ? 'R' : | |
2972 | (tsk->state < 0) ? 'U' : | |
2973 | (tsk->state & TASK_UNINTERRUPTIBLE) ? 'D' : | |
2974 | (tsk->state & TASK_STOPPED) ? 'T' : | |
2975 | (tsk->state & TASK_TRACED) ? 'C' : | |
2976 | (tsk->exit_state & EXIT_ZOMBIE) ? 'Z' : | |
2977 | (tsk->exit_state & EXIT_DEAD) ? 'E' : | |
2978 | (tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?'; | |
2979 | ||
d8104182 | 2980 | printf("%px %016lx %6d %6d %c %2d %s\n", tsk, |
6dfb5404 DM |
2981 | tsk->thread.ksp, |
2982 | tsk->pid, tsk->parent->pid, | |
2983 | state, task_thread_info(tsk)->cpu, | |
2984 | tsk->comm); | |
2985 | } | |
2986 | ||
80eff6c4 BS |
2987 | #ifdef CONFIG_PPC_BOOK3S_64 |
2988 | void format_pte(void *ptep, unsigned long pte) | |
2989 | { | |
2990 | printf("ptep @ 0x%016lx = 0x%016lx\n", (unsigned long)ptep, pte); | |
2991 | printf("Maps physical address = 0x%016lx\n", pte & PTE_RPN_MASK); | |
2992 | ||
2993 | printf("Flags = %s%s%s%s%s\n", | |
2994 | (pte & _PAGE_ACCESSED) ? "Accessed " : "", | |
2995 | (pte & _PAGE_DIRTY) ? "Dirty " : "", | |
2996 | (pte & _PAGE_READ) ? "Read " : "", | |
2997 | (pte & _PAGE_WRITE) ? "Write " : "", | |
2998 | (pte & _PAGE_EXEC) ? "Exec " : ""); | |
2999 | } | |
3000 | ||
3001 | static void show_pte(unsigned long addr) | |
3002 | { | |
3003 | unsigned long tskv = 0; | |
3004 | struct task_struct *tsk = NULL; | |
3005 | struct mm_struct *mm; | |
3006 | pgd_t *pgdp, *pgdir; | |
3007 | pud_t *pudp; | |
3008 | pmd_t *pmdp; | |
3009 | pte_t *ptep; | |
3010 | ||
3011 | if (!scanhex(&tskv)) | |
3012 | mm = &init_mm; | |
3013 | else | |
3014 | tsk = (struct task_struct *)tskv; | |
3015 | ||
3016 | if (tsk == NULL) | |
3017 | mm = &init_mm; | |
3018 | else | |
3019 | mm = tsk->active_mm; | |
3020 | ||
3021 | if (setjmp(bus_error_jmp) != 0) { | |
3022 | catch_memory_errors = 0; | |
d8104182 | 3023 | printf("*** Error dumping pte for task %px\n", tsk); |
80eff6c4 BS |
3024 | return; |
3025 | } | |
3026 | ||
3027 | catch_memory_errors = 1; | |
3028 | sync(); | |
3029 | ||
3030 | if (mm == &init_mm) { | |
3031 | pgdp = pgd_offset_k(addr); | |
3032 | pgdir = pgd_offset_k(0); | |
3033 | } else { | |
3034 | pgdp = pgd_offset(mm, addr); | |
3035 | pgdir = pgd_offset(mm, 0); | |
3036 | } | |
3037 | ||
3038 | if (pgd_none(*pgdp)) { | |
3039 | printf("no linux page table for address\n"); | |
3040 | return; | |
3041 | } | |
3042 | ||
e70d8f55 | 3043 | printf("pgd @ 0x%px\n", pgdir); |
80eff6c4 BS |
3044 | |
3045 | if (pgd_huge(*pgdp)) { | |
3046 | format_pte(pgdp, pgd_val(*pgdp)); | |
3047 | return; | |
3048 | } | |
e70d8f55 | 3049 | printf("pgdp @ 0x%px = 0x%016lx\n", pgdp, pgd_val(*pgdp)); |
80eff6c4 BS |
3050 | |
3051 | pudp = pud_offset(pgdp, addr); | |
3052 | ||
3053 | if (pud_none(*pudp)) { | |
3054 | printf("No valid PUD\n"); | |
3055 | return; | |
3056 | } | |
3057 | ||
3058 | if (pud_huge(*pudp)) { | |
3059 | format_pte(pudp, pud_val(*pudp)); | |
3060 | return; | |
3061 | } | |
3062 | ||
e70d8f55 | 3063 | printf("pudp @ 0x%px = 0x%016lx\n", pudp, pud_val(*pudp)); |
80eff6c4 BS |
3064 | |
3065 | pmdp = pmd_offset(pudp, addr); | |
3066 | ||
3067 | if (pmd_none(*pmdp)) { | |
3068 | printf("No valid PMD\n"); | |
3069 | return; | |
3070 | } | |
3071 | ||
3072 | if (pmd_huge(*pmdp)) { | |
3073 | format_pte(pmdp, pmd_val(*pmdp)); | |
3074 | return; | |
3075 | } | |
e70d8f55 | 3076 | printf("pmdp @ 0x%px = 0x%016lx\n", pmdp, pmd_val(*pmdp)); |
80eff6c4 BS |
3077 | |
3078 | ptep = pte_offset_map(pmdp, addr); | |
3079 | if (pte_none(*ptep)) { | |
3080 | printf("no valid PTE\n"); | |
3081 | return; | |
3082 | } | |
3083 | ||
3084 | format_pte(ptep, pte_val(*ptep)); | |
3085 | ||
3086 | sync(); | |
3087 | __delay(200); | |
3088 | catch_memory_errors = 0; | |
3089 | } | |
3090 | #else | |
3091 | static void show_pte(unsigned long addr) | |
3092 | { | |
3093 | printf("show_pte not yet implemented\n"); | |
3094 | } | |
3095 | #endif /* CONFIG_PPC_BOOK3S_64 */ | |
3096 | ||
6dfb5404 DM |
3097 | static void show_tasks(void) |
3098 | { | |
3099 | unsigned long tskv; | |
3100 | struct task_struct *tsk = NULL; | |
3101 | ||
3102 | printf(" task_struct ->thread.ksp PID PPID S P CMD\n"); | |
3103 | ||
3104 | if (scanhex(&tskv)) | |
3105 | tsk = (struct task_struct *)tskv; | |
3106 | ||
3107 | if (setjmp(bus_error_jmp) != 0) { | |
3108 | catch_memory_errors = 0; | |
d8104182 | 3109 | printf("*** Error dumping task %px\n", tsk); |
6dfb5404 DM |
3110 | return; |
3111 | } | |
3112 | ||
3113 | catch_memory_errors = 1; | |
3114 | sync(); | |
3115 | ||
3116 | if (tsk) | |
3117 | show_task(tsk); | |
3118 | else | |
3119 | for_each_process(tsk) | |
3120 | show_task(tsk); | |
3121 | ||
3122 | sync(); | |
3123 | __delay(200); | |
3124 | catch_memory_errors = 0; | |
3125 | } | |
3126 | ||
9f1067c2 | 3127 | static void proccall(void) |
f78541dc PM |
3128 | { |
3129 | unsigned long args[8]; | |
3130 | unsigned long ret; | |
3131 | int i; | |
3132 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
3133 | unsigned long, unsigned long, unsigned long, | |
3134 | unsigned long, unsigned long, unsigned long); | |
3135 | callfunc_t func; | |
3136 | ||
3137 | if (!scanhex(&adrs)) | |
3138 | return; | |
3139 | if (termch != '\n') | |
3140 | termch = 0; | |
3141 | for (i = 0; i < 8; ++i) | |
3142 | args[i] = 0; | |
3143 | for (i = 0; i < 8; ++i) { | |
3144 | if (!scanhex(&args[i]) || termch == '\n') | |
3145 | break; | |
3146 | termch = 0; | |
3147 | } | |
3148 | func = (callfunc_t) adrs; | |
3149 | ret = 0; | |
3150 | if (setjmp(bus_error_jmp) == 0) { | |
3151 | catch_memory_errors = 1; | |
3152 | sync(); | |
3153 | ret = func(args[0], args[1], args[2], args[3], | |
3154 | args[4], args[5], args[6], args[7]); | |
3155 | sync(); | |
736256e4 | 3156 | printf("return value is 0x%lx\n", ret); |
f78541dc PM |
3157 | } else { |
3158 | printf("*** %x exception occurred\n", fault_except); | |
3159 | } | |
3160 | catch_memory_errors = 0; | |
3161 | } | |
3162 | ||
1da177e4 LT |
3163 | /* Input scanning routines */ |
3164 | int | |
3165 | skipbl(void) | |
3166 | { | |
3167 | int c; | |
3168 | ||
3169 | if( termch != 0 ){ | |
3170 | c = termch; | |
3171 | termch = 0; | |
3172 | } else | |
3173 | c = inchar(); | |
3174 | while( c == ' ' || c == '\t' ) | |
3175 | c = inchar(); | |
3176 | return c; | |
3177 | } | |
3178 | ||
3179 | #define N_PTREGS 44 | |
0abbf2bf | 3180 | static const char *regnames[N_PTREGS] = { |
1da177e4 LT |
3181 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
3182 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
3183 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
3184 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
3185 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
3186 | #ifdef CONFIG_PPC64 | |
3187 | "softe", | |
3188 | #else | |
3189 | "mq", | |
3190 | #endif | |
1da177e4 LT |
3191 | "trap", "dar", "dsisr", "res" |
3192 | }; | |
3193 | ||
3194 | int | |
3195 | scanhex(unsigned long *vp) | |
3196 | { | |
3197 | int c, d; | |
3198 | unsigned long v; | |
3199 | ||
3200 | c = skipbl(); | |
3201 | if (c == '%') { | |
3202 | /* parse register name */ | |
3203 | char regname[8]; | |
3204 | int i; | |
3205 | ||
3206 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
3207 | c = inchar(); | |
3208 | if (!isalnum(c)) { | |
3209 | termch = c; | |
3210 | break; | |
3211 | } | |
3212 | regname[i] = c; | |
3213 | } | |
3214 | regname[i] = 0; | |
0abbf2bf YX |
3215 | i = match_string(regnames, N_PTREGS, regname); |
3216 | if (i < 0) { | |
3217 | printf("invalid register name '%%%s'\n", regname); | |
3218 | return 0; | |
1da177e4 | 3219 | } |
0abbf2bf YX |
3220 | if (xmon_regs == NULL) { |
3221 | printf("regs not available\n"); | |
3222 | return 0; | |
3223 | } | |
3224 | *vp = ((unsigned long *)xmon_regs)[i]; | |
3225 | return 1; | |
1da177e4 LT |
3226 | } |
3227 | ||
3228 | /* skip leading "0x" if any */ | |
3229 | ||
3230 | if (c == '0') { | |
3231 | c = inchar(); | |
3232 | if (c == 'x') { | |
3233 | c = inchar(); | |
3234 | } else { | |
3235 | d = hexdigit(c); | |
3236 | if (d == EOF) { | |
3237 | termch = c; | |
3238 | *vp = 0; | |
3239 | return 1; | |
3240 | } | |
3241 | } | |
3242 | } else if (c == '$') { | |
3243 | int i; | |
3244 | for (i=0; i<63; i++) { | |
3245 | c = inchar(); | |
05b981f4 | 3246 | if (isspace(c) || c == '\0') { |
1da177e4 LT |
3247 | termch = c; |
3248 | break; | |
3249 | } | |
3250 | tmpstr[i] = c; | |
3251 | } | |
3252 | tmpstr[i++] = 0; | |
6879dc13 BH |
3253 | *vp = 0; |
3254 | if (setjmp(bus_error_jmp) == 0) { | |
3255 | catch_memory_errors = 1; | |
3256 | sync(); | |
3257 | *vp = kallsyms_lookup_name(tmpstr); | |
3258 | sync(); | |
3259 | } | |
3260 | catch_memory_errors = 0; | |
1da177e4 LT |
3261 | if (!(*vp)) { |
3262 | printf("unknown symbol '%s'\n", tmpstr); | |
3263 | return 0; | |
3264 | } | |
3265 | return 1; | |
3266 | } | |
3267 | ||
3268 | d = hexdigit(c); | |
3269 | if (d == EOF) { | |
3270 | termch = c; | |
3271 | return 0; | |
3272 | } | |
3273 | v = 0; | |
3274 | do { | |
3275 | v = (v << 4) + d; | |
3276 | c = inchar(); | |
3277 | d = hexdigit(c); | |
3278 | } while (d != EOF); | |
3279 | termch = c; | |
3280 | *vp = v; | |
3281 | return 1; | |
3282 | } | |
3283 | ||
9f1067c2 | 3284 | static void |
1da177e4 LT |
3285 | scannl(void) |
3286 | { | |
3287 | int c; | |
3288 | ||
3289 | c = termch; | |
3290 | termch = 0; | |
3291 | while( c != '\n' ) | |
3292 | c = inchar(); | |
3293 | } | |
3294 | ||
9f1067c2 | 3295 | static int hexdigit(int c) |
1da177e4 LT |
3296 | { |
3297 | if( '0' <= c && c <= '9' ) | |
3298 | return c - '0'; | |
3299 | if( 'A' <= c && c <= 'F' ) | |
3300 | return c - ('A' - 10); | |
3301 | if( 'a' <= c && c <= 'f' ) | |
3302 | return c - ('a' - 10); | |
3303 | return EOF; | |
3304 | } | |
3305 | ||
3306 | void | |
3307 | getstring(char *s, int size) | |
3308 | { | |
3309 | int c; | |
3310 | ||
3311 | c = skipbl(); | |
3312 | do { | |
3313 | if( size > 1 ){ | |
3314 | *s++ = c; | |
3315 | --size; | |
3316 | } | |
3317 | c = inchar(); | |
3318 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
3319 | termch = c; | |
3320 | *s = 0; | |
3321 | } | |
3322 | ||
3323 | static char line[256]; | |
3324 | static char *lineptr; | |
3325 | ||
9f1067c2 | 3326 | static void |
1da177e4 LT |
3327 | flush_input(void) |
3328 | { | |
3329 | lineptr = NULL; | |
3330 | } | |
3331 | ||
9f1067c2 | 3332 | static int |
1da177e4 LT |
3333 | inchar(void) |
3334 | { | |
3335 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 3336 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
3337 | lineptr = NULL; |
3338 | return EOF; | |
3339 | } | |
3340 | lineptr = line; | |
3341 | } | |
3342 | return *lineptr++; | |
3343 | } | |
3344 | ||
9f1067c2 | 3345 | static void |
1da177e4 LT |
3346 | take_input(char *str) |
3347 | { | |
3348 | lineptr = str; | |
3349 | } | |
3350 | ||
3351 | ||
3352 | static void | |
3353 | symbol_lookup(void) | |
3354 | { | |
3355 | int type = inchar(); | |
3356 | unsigned long addr; | |
3357 | static char tmp[64]; | |
3358 | ||
3359 | switch (type) { | |
3360 | case 'a': | |
3361 | if (scanhex(&addr)) | |
3362 | xmon_print_symbol(addr, ": ", "\n"); | |
3363 | termch = 0; | |
3364 | break; | |
3365 | case 's': | |
3366 | getstring(tmp, 64); | |
3367 | if (setjmp(bus_error_jmp) == 0) { | |
3368 | catch_memory_errors = 1; | |
3369 | sync(); | |
3370 | addr = kallsyms_lookup_name(tmp); | |
3371 | if (addr) | |
3372 | printf("%s: %lx\n", tmp, addr); | |
3373 | else | |
3374 | printf("Symbol '%s' not found.\n", tmp); | |
3375 | sync(); | |
3376 | } | |
3377 | catch_memory_errors = 0; | |
3378 | termch = 0; | |
3379 | break; | |
3380 | } | |
3381 | } | |
3382 | ||
3383 | ||
3384 | /* Print an address in numeric and symbolic form (if possible) */ | |
3385 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
3386 | const char *after) | |
3387 | { | |
3388 | char *modname; | |
3389 | const char *name = NULL; | |
3390 | unsigned long offset, size; | |
3391 | ||
f78541dc | 3392 | printf(REG, address); |
1da177e4 LT |
3393 | if (setjmp(bus_error_jmp) == 0) { |
3394 | catch_memory_errors = 1; | |
3395 | sync(); | |
3396 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
3397 | tmpstr); | |
3398 | sync(); | |
3399 | /* wait a little while to see if we get a machine check */ | |
3400 | __delay(200); | |
3401 | } | |
3402 | ||
3403 | catch_memory_errors = 0; | |
3404 | ||
3405 | if (name) { | |
3406 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
3407 | if (modname) | |
3408 | printf(" [%s]", modname); | |
3409 | } | |
3410 | printf("%s", after); | |
3411 | } | |
3412 | ||
4e003747 | 3413 | #ifdef CONFIG_PPC_BOOK3S_64 |
13b3d13b | 3414 | void dump_segments(void) |
1da177e4 LT |
3415 | { |
3416 | int i; | |
8218a303 | 3417 | unsigned long esid,vsid; |
b3b9595f | 3418 | unsigned long llp; |
1da177e4 | 3419 | |
736256e4 | 3420 | printf("SLB contents of cpu 0x%x\n", smp_processor_id()); |
1da177e4 | 3421 | |
584f8b71 | 3422 | for (i = 0; i < mmu_slb_size; i++) { |
b3b9595f | 3423 | asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i)); |
3424 | asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i)); | |
85673646 ME |
3425 | |
3426 | if (!esid && !vsid) | |
3427 | continue; | |
3428 | ||
3429 | printf("%02d %016lx %016lx", i, esid, vsid); | |
3430 | ||
3431 | if (!(esid & SLB_ESID_V)) { | |
3432 | printf("\n"); | |
3433 | continue; | |
3434 | } | |
3435 | ||
3436 | llp = vsid & SLB_VSID_LLP; | |
3437 | if (vsid & SLB_VSID_B_1T) { | |
3438 | printf(" 1T ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
3439 | GET_ESID_1T(esid), | |
3440 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T, | |
3441 | llp); | |
3442 | } else { | |
3443 | printf(" 256M ESID=%9lx VSID=%13lx LLP:%3lx \n", | |
3444 | GET_ESID(esid), | |
3445 | (vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT, | |
3446 | llp); | |
b3b9595f | 3447 | } |
1da177e4 LT |
3448 | } |
3449 | } | |
f78541dc PM |
3450 | #endif |
3451 | ||
3452 | #ifdef CONFIG_PPC_STD_MMU_32 | |
3453 | void dump_segments(void) | |
3454 | { | |
3455 | int i; | |
3456 | ||
3457 | printf("sr0-15 ="); | |
3458 | for (i = 0; i < 16; ++i) | |
3459 | printf(" %x", mfsrin(i)); | |
3460 | printf("\n"); | |
3461 | } | |
3462 | #endif | |
3463 | ||
5a8a1a28 BH |
3464 | #ifdef CONFIG_44x |
3465 | static void dump_tlb_44x(void) | |
3466 | { | |
3467 | int i; | |
3468 | ||
3469 | for (i = 0; i < PPC44x_TLB_SIZE; i++) { | |
3470 | unsigned long w0,w1,w2; | |
3471 | asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i)); | |
3472 | asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i)); | |
3473 | asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i)); | |
e70d8f55 | 3474 | printf("[%02x] %08lx %08lx %08lx ", i, w0, w1, w2); |
5a8a1a28 | 3475 | if (w0 & PPC44x_TLB_VALID) { |
e70d8f55 | 3476 | printf("V %08lx -> %01lx%08lx %c%c%c%c%c", |
5a8a1a28 BH |
3477 | w0 & PPC44x_TLB_EPN_MASK, |
3478 | w1 & PPC44x_TLB_ERPN_MASK, | |
3479 | w1 & PPC44x_TLB_RPN_MASK, | |
3480 | (w2 & PPC44x_TLB_W) ? 'W' : 'w', | |
3481 | (w2 & PPC44x_TLB_I) ? 'I' : 'i', | |
3482 | (w2 & PPC44x_TLB_M) ? 'M' : 'm', | |
3483 | (w2 & PPC44x_TLB_G) ? 'G' : 'g', | |
3484 | (w2 & PPC44x_TLB_E) ? 'E' : 'e'); | |
3485 | } | |
3486 | printf("\n"); | |
3487 | } | |
3488 | } | |
3489 | #endif /* CONFIG_44x */ | |
9f1067c2 | 3490 | |
03247157 BH |
3491 | #ifdef CONFIG_PPC_BOOK3E |
3492 | static void dump_tlb_book3e(void) | |
3493 | { | |
3494 | u32 mmucfg, pidmask, lpidmask; | |
3495 | u64 ramask; | |
3496 | int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0; | |
3497 | int mmu_version; | |
3498 | static const char *pgsz_names[] = { | |
3499 | " 1K", | |
3500 | " 2K", | |
3501 | " 4K", | |
3502 | " 8K", | |
3503 | " 16K", | |
3504 | " 32K", | |
3505 | " 64K", | |
3506 | "128K", | |
3507 | "256K", | |
3508 | "512K", | |
3509 | " 1M", | |
3510 | " 2M", | |
3511 | " 4M", | |
3512 | " 8M", | |
3513 | " 16M", | |
3514 | " 32M", | |
3515 | " 64M", | |
3516 | "128M", | |
3517 | "256M", | |
3518 | "512M", | |
3519 | " 1G", | |
3520 | " 2G", | |
3521 | " 4G", | |
3522 | " 8G", | |
3523 | " 16G", | |
3524 | " 32G", | |
3525 | " 64G", | |
3526 | "128G", | |
3527 | "256G", | |
3528 | "512G", | |
3529 | " 1T", | |
3530 | " 2T", | |
3531 | }; | |
3532 | ||
3533 | /* Gather some infos about the MMU */ | |
3534 | mmucfg = mfspr(SPRN_MMUCFG); | |
3535 | mmu_version = (mmucfg & 3) + 1; | |
3536 | ntlbs = ((mmucfg >> 2) & 3) + 1; | |
3537 | pidsz = ((mmucfg >> 6) & 0x1f) + 1; | |
3538 | lpidsz = (mmucfg >> 24) & 0xf; | |
3539 | rasz = (mmucfg >> 16) & 0x7f; | |
3540 | if ((mmu_version > 1) && (mmucfg & 0x10000)) | |
3541 | lrat = 1; | |
3542 | printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n", | |
3543 | mmu_version, ntlbs, pidsz, lpidsz, rasz); | |
3544 | pidmask = (1ul << pidsz) - 1; | |
3545 | lpidmask = (1ul << lpidsz) - 1; | |
3546 | ramask = (1ull << rasz) - 1; | |
3547 | ||
3548 | for (tlb = 0; tlb < ntlbs; tlb++) { | |
3549 | u32 tlbcfg; | |
3550 | int nent, assoc, new_cc = 1; | |
3551 | printf("TLB %d:\n------\n", tlb); | |
3552 | switch(tlb) { | |
3553 | case 0: | |
3554 | tlbcfg = mfspr(SPRN_TLB0CFG); | |
3555 | break; | |
3556 | case 1: | |
3557 | tlbcfg = mfspr(SPRN_TLB1CFG); | |
3558 | break; | |
3559 | case 2: | |
3560 | tlbcfg = mfspr(SPRN_TLB2CFG); | |
3561 | break; | |
3562 | case 3: | |
3563 | tlbcfg = mfspr(SPRN_TLB3CFG); | |
3564 | break; | |
3565 | default: | |
3566 | printf("Unsupported TLB number !\n"); | |
3567 | continue; | |
3568 | } | |
3569 | nent = tlbcfg & 0xfff; | |
3570 | assoc = (tlbcfg >> 24) & 0xff; | |
3571 | for (i = 0; i < nent; i++) { | |
3572 | u32 mas0 = MAS0_TLBSEL(tlb); | |
3573 | u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K); | |
3574 | u64 mas2 = 0; | |
3575 | u64 mas7_mas3; | |
3576 | int esel = i, cc = i; | |
3577 | ||
3578 | if (assoc != 0) { | |
3579 | cc = i / assoc; | |
3580 | esel = i % assoc; | |
3581 | mas2 = cc * 0x1000; | |
3582 | } | |
3583 | ||
3584 | mas0 |= MAS0_ESEL(esel); | |
3585 | mtspr(SPRN_MAS0, mas0); | |
3586 | mtspr(SPRN_MAS1, mas1); | |
3587 | mtspr(SPRN_MAS2, mas2); | |
3588 | asm volatile("tlbre 0,0,0" : : : "memory"); | |
3589 | mas1 = mfspr(SPRN_MAS1); | |
3590 | mas2 = mfspr(SPRN_MAS2); | |
3591 | mas7_mas3 = mfspr(SPRN_MAS7_MAS3); | |
3592 | if (assoc && (i % assoc) == 0) | |
3593 | new_cc = 1; | |
3594 | if (!(mas1 & MAS1_VALID)) | |
3595 | continue; | |
3596 | if (assoc == 0) | |
3597 | printf("%04x- ", i); | |
3598 | else if (new_cc) | |
3599 | printf("%04x-%c", cc, 'A' + esel); | |
3600 | else | |
3601 | printf(" |%c", 'A' + esel); | |
3602 | new_cc = 0; | |
3603 | printf(" %016llx %04x %s %c%c AS%c", | |
3604 | mas2 & ~0x3ffull, | |
3605 | (mas1 >> 16) & 0x3fff, | |
3606 | pgsz_names[(mas1 >> 7) & 0x1f], | |
3607 | mas1 & MAS1_IND ? 'I' : ' ', | |
3608 | mas1 & MAS1_IPROT ? 'P' : ' ', | |
3609 | mas1 & MAS1_TS ? '1' : '0'); | |
3610 | printf(" %c%c%c%c%c%c%c", | |
3611 | mas2 & MAS2_X0 ? 'a' : ' ', | |
3612 | mas2 & MAS2_X1 ? 'v' : ' ', | |
3613 | mas2 & MAS2_W ? 'w' : ' ', | |
3614 | mas2 & MAS2_I ? 'i' : ' ', | |
3615 | mas2 & MAS2_M ? 'm' : ' ', | |
3616 | mas2 & MAS2_G ? 'g' : ' ', | |
3617 | mas2 & MAS2_E ? 'e' : ' '); | |
3618 | printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull); | |
3619 | if (mas1 & MAS1_IND) | |
3620 | printf(" %s\n", | |
3621 | pgsz_names[(mas7_mas3 >> 1) & 0x1f]); | |
3622 | else | |
3623 | printf(" U%c%c%c S%c%c%c\n", | |
3624 | mas7_mas3 & MAS3_UX ? 'x' : ' ', | |
3625 | mas7_mas3 & MAS3_UW ? 'w' : ' ', | |
3626 | mas7_mas3 & MAS3_UR ? 'r' : ' ', | |
3627 | mas7_mas3 & MAS3_SX ? 'x' : ' ', | |
3628 | mas7_mas3 & MAS3_SW ? 'w' : ' ', | |
3629 | mas7_mas3 & MAS3_SR ? 'r' : ' '); | |
3630 | } | |
3631 | } | |
3632 | } | |
3633 | #endif /* CONFIG_PPC_BOOK3E */ | |
3634 | ||
9f1067c2 | 3635 | static void xmon_init(int enable) |
b13cfd17 OH |
3636 | { |
3637 | if (enable) { | |
3638 | __debugger = xmon; | |
3639 | __debugger_ipi = xmon_ipi; | |
3640 | __debugger_bpt = xmon_bpt; | |
3641 | __debugger_sstep = xmon_sstep; | |
3642 | __debugger_iabr_match = xmon_iabr_match; | |
9422de3e | 3643 | __debugger_break_match = xmon_break_match; |
b13cfd17 OH |
3644 | __debugger_fault_handler = xmon_fault_handler; |
3645 | } else { | |
3646 | __debugger = NULL; | |
3647 | __debugger_ipi = NULL; | |
3648 | __debugger_bpt = NULL; | |
3649 | __debugger_sstep = NULL; | |
3650 | __debugger_iabr_match = NULL; | |
9422de3e | 3651 | __debugger_break_match = NULL; |
b13cfd17 OH |
3652 | __debugger_fault_handler = NULL; |
3653 | } | |
1da177e4 | 3654 | } |
fca5dcd4 PM |
3655 | |
3656 | #ifdef CONFIG_MAGIC_SYSRQ | |
1495cc9d | 3657 | static void sysrq_handle_xmon(int key) |
fca5dcd4 PM |
3658 | { |
3659 | /* ensure xmon is enabled */ | |
3660 | xmon_init(1); | |
7d12e780 | 3661 | debugger(get_irq_regs()); |
3b5bf42b PX |
3662 | if (!xmon_on) |
3663 | xmon_init(0); | |
fca5dcd4 PM |
3664 | } |
3665 | ||
1495cc9d | 3666 | static struct sysrq_key_op sysrq_xmon_op = { |
fca5dcd4 | 3667 | .handler = sysrq_handle_xmon, |
90a102e5 | 3668 | .help_msg = "xmon(x)", |
fca5dcd4 PM |
3669 | .action_msg = "Entering xmon", |
3670 | }; | |
3671 | ||
3672 | static int __init setup_xmon_sysrq(void) | |
3673 | { | |
3674 | register_sysrq_key('x', &sysrq_xmon_op); | |
3675 | return 0; | |
3676 | } | |
b561783c | 3677 | device_initcall(setup_xmon_sysrq); |
fca5dcd4 | 3678 | #endif /* CONFIG_MAGIC_SYSRQ */ |
47679283 | 3679 | |
de78ae6c | 3680 | #ifdef CONFIG_DEBUG_FS |
1ff3b404 VJ |
3681 | static void clear_all_bpt(void) |
3682 | { | |
3683 | int i; | |
3684 | ||
3685 | /* clear/unpatch all breakpoints */ | |
3686 | remove_bpts(); | |
3687 | remove_cpu_bpts(); | |
3688 | ||
3689 | /* Disable all breakpoints */ | |
3690 | for (i = 0; i < NBPTS; ++i) | |
3691 | bpts[i].enabled = 0; | |
3692 | ||
3693 | /* Clear any data or iabr breakpoints */ | |
3694 | if (iabr || dabr.enabled) { | |
3695 | iabr = NULL; | |
3696 | dabr.enabled = 0; | |
3697 | } | |
3698 | ||
3699 | printf("xmon: All breakpoints cleared\n"); | |
3700 | } | |
3701 | ||
de78ae6c GP |
3702 | static int xmon_dbgfs_set(void *data, u64 val) |
3703 | { | |
3704 | xmon_on = !!val; | |
3705 | xmon_init(xmon_on); | |
3706 | ||
1ff3b404 VJ |
3707 | /* make sure all breakpoints removed when disabling */ |
3708 | if (!xmon_on) | |
3709 | clear_all_bpt(); | |
de78ae6c GP |
3710 | return 0; |
3711 | } | |
3712 | ||
3713 | static int xmon_dbgfs_get(void *data, u64 *val) | |
3714 | { | |
3715 | *val = xmon_on; | |
3716 | return 0; | |
3717 | } | |
3718 | ||
3719 | DEFINE_SIMPLE_ATTRIBUTE(xmon_dbgfs_ops, xmon_dbgfs_get, | |
3720 | xmon_dbgfs_set, "%llu\n"); | |
3721 | ||
3722 | static int __init setup_xmon_dbgfs(void) | |
3723 | { | |
3724 | debugfs_create_file("xmon", 0600, powerpc_debugfs_root, NULL, | |
3725 | &xmon_dbgfs_ops); | |
3726 | return 0; | |
3727 | } | |
3728 | device_initcall(setup_xmon_dbgfs); | |
3729 | #endif /* CONFIG_DEBUG_FS */ | |
3730 | ||
b561783c | 3731 | static int xmon_early __initdata; |
47679283 ME |
3732 | |
3733 | static int __init early_parse_xmon(char *p) | |
3734 | { | |
3735 | if (!p || strncmp(p, "early", 5) == 0) { | |
3736 | /* just "xmon" is equivalent to "xmon=early" */ | |
3737 | xmon_init(1); | |
3738 | xmon_early = 1; | |
3b5bf42b PX |
3739 | xmon_on = 1; |
3740 | } else if (strncmp(p, "on", 2) == 0) { | |
47679283 | 3741 | xmon_init(1); |
3b5bf42b PX |
3742 | xmon_on = 1; |
3743 | } else if (strncmp(p, "off", 3) == 0) | |
3744 | xmon_on = 0; | |
47679283 ME |
3745 | else |
3746 | return 1; | |
3747 | ||
3748 | return 0; | |
3749 | } | |
3750 | early_param("xmon", early_parse_xmon); | |
3751 | ||
3752 | void __init xmon_setup(void) | |
3753 | { | |
3b5bf42b | 3754 | if (xmon_on) |
47679283 | 3755 | xmon_init(1); |
47679283 ME |
3756 | if (xmon_early) |
3757 | debugger(NULL); | |
3758 | } | |
ff8a8f25 | 3759 | |
e055595d | 3760 | #ifdef CONFIG_SPU_BASE |
ff8a8f25 ME |
3761 | |
3762 | struct spu_info { | |
3763 | struct spu *spu; | |
3764 | u64 saved_mfc_sr1_RW; | |
3765 | u32 saved_spu_runcntl_RW; | |
24a24c85 | 3766 | unsigned long dump_addr; |
ff8a8f25 ME |
3767 | u8 stopped_ok; |
3768 | }; | |
3769 | ||
3770 | #define XMON_NUM_SPUS 16 /* Enough for current hardware */ | |
3771 | ||
3772 | static struct spu_info spu_info[XMON_NUM_SPUS]; | |
3773 | ||
3774 | void xmon_register_spus(struct list_head *list) | |
3775 | { | |
3776 | struct spu *spu; | |
3777 | ||
3778 | list_for_each_entry(spu, list, full_list) { | |
3779 | if (spu->number >= XMON_NUM_SPUS) { | |
3780 | WARN_ON(1); | |
3781 | continue; | |
3782 | } | |
3783 | ||
3784 | spu_info[spu->number].spu = spu; | |
3785 | spu_info[spu->number].stopped_ok = 0; | |
24a24c85 ME |
3786 | spu_info[spu->number].dump_addr = (unsigned long) |
3787 | spu_info[spu->number].spu->local_store; | |
ff8a8f25 ME |
3788 | } |
3789 | } | |
3790 | ||
3791 | static void stop_spus(void) | |
3792 | { | |
3793 | struct spu *spu; | |
3794 | int i; | |
3795 | u64 tmp; | |
3796 | ||
3797 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3798 | if (!spu_info[i].spu) | |
3799 | continue; | |
3800 | ||
3801 | if (setjmp(bus_error_jmp) == 0) { | |
3802 | catch_memory_errors = 1; | |
3803 | sync(); | |
3804 | ||
3805 | spu = spu_info[i].spu; | |
3806 | ||
3807 | spu_info[i].saved_spu_runcntl_RW = | |
3808 | in_be32(&spu->problem->spu_runcntl_RW); | |
3809 | ||
3810 | tmp = spu_mfc_sr1_get(spu); | |
3811 | spu_info[i].saved_mfc_sr1_RW = tmp; | |
3812 | ||
3813 | tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; | |
3814 | spu_mfc_sr1_set(spu, tmp); | |
3815 | ||
3816 | sync(); | |
3817 | __delay(200); | |
3818 | ||
3819 | spu_info[i].stopped_ok = 1; | |
2a14442b ME |
3820 | |
3821 | printf("Stopped spu %.2d (was %s)\n", i, | |
3822 | spu_info[i].saved_spu_runcntl_RW ? | |
3823 | "running" : "stopped"); | |
ff8a8f25 ME |
3824 | } else { |
3825 | catch_memory_errors = 0; | |
3826 | printf("*** Error stopping spu %.2d\n", i); | |
3827 | } | |
3828 | catch_memory_errors = 0; | |
3829 | } | |
3830 | } | |
3831 | ||
3832 | static void restart_spus(void) | |
3833 | { | |
3834 | struct spu *spu; | |
3835 | int i; | |
3836 | ||
3837 | for (i = 0; i < XMON_NUM_SPUS; i++) { | |
3838 | if (!spu_info[i].spu) | |
3839 | continue; | |
3840 | ||
3841 | if (!spu_info[i].stopped_ok) { | |
3842 | printf("*** Error, spu %d was not successfully stopped" | |
3843 | ", not restarting\n", i); | |
3844 | continue; | |
3845 | } | |
3846 | ||
3847 | if (setjmp(bus_error_jmp) == 0) { | |
3848 | catch_memory_errors = 1; | |
3849 | sync(); | |
3850 | ||
3851 | spu = spu_info[i].spu; | |
3852 | spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW); | |
3853 | out_be32(&spu->problem->spu_runcntl_RW, | |
3854 | spu_info[i].saved_spu_runcntl_RW); | |
3855 | ||
3856 | sync(); | |
3857 | __delay(200); | |
3858 | ||
3859 | printf("Restarted spu %.2d\n", i); | |
3860 | } else { | |
3861 | catch_memory_errors = 0; | |
3862 | printf("*** Error restarting spu %.2d\n", i); | |
3863 | } | |
3864 | catch_memory_errors = 0; | |
3865 | } | |
3866 | } | |
3867 | ||
a8984970 | 3868 | #define DUMP_WIDTH 23 |
437a0706 | 3869 | #define DUMP_VALUE(format, field, value) \ |
a8984970 ME |
3870 | do { \ |
3871 | if (setjmp(bus_error_jmp) == 0) { \ | |
3872 | catch_memory_errors = 1; \ | |
3873 | sync(); \ | |
3874 | printf(" %-*s = "format"\n", DUMP_WIDTH, \ | |
437a0706 | 3875 | #field, value); \ |
a8984970 ME |
3876 | sync(); \ |
3877 | __delay(200); \ | |
3878 | } else { \ | |
3879 | catch_memory_errors = 0; \ | |
3880 | printf(" %-*s = *** Error reading field.\n", \ | |
3881 | DUMP_WIDTH, #field); \ | |
3882 | } \ | |
3883 | catch_memory_errors = 0; \ | |
3884 | } while (0) | |
3885 | ||
437a0706 ME |
3886 | #define DUMP_FIELD(obj, format, field) \ |
3887 | DUMP_VALUE(format, field, obj->field) | |
3888 | ||
a8984970 ME |
3889 | static void dump_spu_fields(struct spu *spu) |
3890 | { | |
3891 | printf("Dumping spu fields at address %p:\n", spu); | |
3892 | ||
3893 | DUMP_FIELD(spu, "0x%x", number); | |
3894 | DUMP_FIELD(spu, "%s", name); | |
a8984970 ME |
3895 | DUMP_FIELD(spu, "0x%lx", local_store_phys); |
3896 | DUMP_FIELD(spu, "0x%p", local_store); | |
3897 | DUMP_FIELD(spu, "0x%lx", ls_size); | |
3898 | DUMP_FIELD(spu, "0x%x", node); | |
3899 | DUMP_FIELD(spu, "0x%lx", flags); | |
e70d8f55 MM |
3900 | DUMP_FIELD(spu, "%llu", class_0_pending); |
3901 | DUMP_FIELD(spu, "0x%llx", class_0_dar); | |
3902 | DUMP_FIELD(spu, "0x%llx", class_1_dar); | |
3903 | DUMP_FIELD(spu, "0x%llx", class_1_dsisr); | |
3904 | DUMP_FIELD(spu, "0x%x", irqs[0]); | |
3905 | DUMP_FIELD(spu, "0x%x", irqs[1]); | |
3906 | DUMP_FIELD(spu, "0x%x", irqs[2]); | |
a8984970 ME |
3907 | DUMP_FIELD(spu, "0x%x", slb_replace); |
3908 | DUMP_FIELD(spu, "%d", pid); | |
a8984970 ME |
3909 | DUMP_FIELD(spu, "0x%p", mm); |
3910 | DUMP_FIELD(spu, "0x%p", ctx); | |
3911 | DUMP_FIELD(spu, "0x%p", rq); | |
e70d8f55 | 3912 | DUMP_FIELD(spu, "0x%llx", timestamp); |
a8984970 ME |
3913 | DUMP_FIELD(spu, "0x%lx", problem_phys); |
3914 | DUMP_FIELD(spu, "0x%p", problem); | |
437a0706 ME |
3915 | DUMP_VALUE("0x%x", problem->spu_runcntl_RW, |
3916 | in_be32(&spu->problem->spu_runcntl_RW)); | |
3917 | DUMP_VALUE("0x%x", problem->spu_status_R, | |
3918 | in_be32(&spu->problem->spu_status_R)); | |
3919 | DUMP_VALUE("0x%x", problem->spu_npc_RW, | |
3920 | in_be32(&spu->problem->spu_npc_RW)); | |
a8984970 | 3921 | DUMP_FIELD(spu, "0x%p", priv2); |
a985239b | 3922 | DUMP_FIELD(spu, "0x%p", pdata); |
a8984970 ME |
3923 | } |
3924 | ||
af89fb80 ME |
3925 | int |
3926 | spu_inst_dump(unsigned long adr, long count, int praddr) | |
3927 | { | |
3928 | return generic_inst_dump(adr, count, praddr, print_insn_spu); | |
3929 | } | |
3930 | ||
3931 | static void dump_spu_ls(unsigned long num, int subcmd) | |
24a24c85 ME |
3932 | { |
3933 | unsigned long offset, addr, ls_addr; | |
3934 | ||
3935 | if (setjmp(bus_error_jmp) == 0) { | |
3936 | catch_memory_errors = 1; | |
3937 | sync(); | |
3938 | ls_addr = (unsigned long)spu_info[num].spu->local_store; | |
3939 | sync(); | |
3940 | __delay(200); | |
3941 | } else { | |
3942 | catch_memory_errors = 0; | |
e70d8f55 | 3943 | printf("*** Error: accessing spu info for spu %ld\n", num); |
24a24c85 ME |
3944 | return; |
3945 | } | |
3946 | catch_memory_errors = 0; | |
3947 | ||
3948 | if (scanhex(&offset)) | |
3949 | addr = ls_addr + offset; | |
3950 | else | |
3951 | addr = spu_info[num].dump_addr; | |
3952 | ||
3953 | if (addr >= ls_addr + LS_SIZE) { | |
3954 | printf("*** Error: address outside of local store\n"); | |
3955 | return; | |
3956 | } | |
3957 | ||
af89fb80 ME |
3958 | switch (subcmd) { |
3959 | case 'i': | |
3960 | addr += spu_inst_dump(addr, 16, 1); | |
3961 | last_cmd = "sdi\n"; | |
3962 | break; | |
3963 | default: | |
3964 | prdump(addr, 64); | |
3965 | addr += 64; | |
3966 | last_cmd = "sd\n"; | |
3967 | break; | |
3968 | } | |
24a24c85 ME |
3969 | |
3970 | spu_info[num].dump_addr = addr; | |
3971 | } | |
3972 | ||
ff8a8f25 ME |
3973 | static int do_spu_cmd(void) |
3974 | { | |
24a24c85 | 3975 | static unsigned long num = 0; |
af89fb80 | 3976 | int cmd, subcmd = 0; |
ff8a8f25 ME |
3977 | |
3978 | cmd = inchar(); | |
3979 | switch (cmd) { | |
3980 | case 's': | |
3981 | stop_spus(); | |
3982 | break; | |
3983 | case 'r': | |
3984 | restart_spus(); | |
3985 | break; | |
24a24c85 | 3986 | case 'd': |
af89fb80 ME |
3987 | subcmd = inchar(); |
3988 | if (isxdigit(subcmd) || subcmd == '\n') | |
3989 | termch = subcmd; | |
3990 | case 'f': | |
24a24c85 ME |
3991 | scanhex(&num); |
3992 | if (num >= XMON_NUM_SPUS || !spu_info[num].spu) { | |
a8984970 | 3993 | printf("*** Error: invalid spu number\n"); |
24a24c85 ME |
3994 | return 0; |
3995 | } | |
3996 | ||
3997 | switch (cmd) { | |
3998 | case 'f': | |
3999 | dump_spu_fields(spu_info[num].spu); | |
4000 | break; | |
4001 | default: | |
af89fb80 | 4002 | dump_spu_ls(num, subcmd); |
24a24c85 ME |
4003 | break; |
4004 | } | |
4005 | ||
a8984970 | 4006 | break; |
ff8a8f25 ME |
4007 | default: |
4008 | return -1; | |
4009 | } | |
4010 | ||
4011 | return 0; | |
4012 | } | |
e055595d | 4013 | #else /* ! CONFIG_SPU_BASE */ |
ff8a8f25 ME |
4014 | static int do_spu_cmd(void) |
4015 | { | |
4016 | return -1; | |
4017 | } | |
4018 | #endif |