2 * arch/s390/kernel/traps.c
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
7 * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
9 * Derived from "arch/i386/kernel/traps.c"
10 * Copyright (C) 1991, 1992 Linus Torvalds
14 * 'Traps.c' handles hardware traps and faults after we have saved some
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/ptrace.h>
22 #include <linux/timer.h>
24 #include <linux/smp.h>
25 #include <linux/smp_lock.h>
26 #include <linux/init.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/module.h>
30 #include <linux/kallsyms.h>
31 #include <linux/reboot.h>
33 #include <asm/system.h>
34 #include <asm/uaccess.h>
36 #include <asm/atomic.h>
37 #include <asm/mathemu.h>
38 #include <asm/cpcmd.h>
39 #include <asm/s390_ext.h>
40 #include <asm/lowcore.h>
41 #include <asm/debug.h>
43 /* Called from entry.S only */
44 extern void handle_per_exception(struct pt_regs
*regs
);
46 typedef void pgm_check_handler_t(struct pt_regs
*, long);
47 pgm_check_handler_t
*pgm_check_table
[128];
50 #ifdef CONFIG_PROCESS_DEBUG
51 int sysctl_userprocess_debug
= 1;
53 int sysctl_userprocess_debug
= 0;
57 extern pgm_check_handler_t do_protection_exception
;
58 extern pgm_check_handler_t do_dat_exception
;
60 extern int pfault_init(void);
61 extern void pfault_fini(void);
62 extern void pfault_interrupt(struct pt_regs
*regs
, __u16 error_code
);
63 static ext_int_info_t ext_int_pfault
;
65 extern pgm_check_handler_t do_monitor_call
;
67 #define stack_pointer ({ void **sp; asm("la %0,0(15)" : "=&d" (sp)); sp; })
70 #define FOURLONG "%08lx %08lx %08lx %08lx\n"
71 static int kstack_depth_to_print
= 12;
72 #else /* CONFIG_64BIT */
73 #define FOURLONG "%016lx %016lx %016lx %016lx\n"
74 static int kstack_depth_to_print
= 20;
75 #endif /* CONFIG_64BIT */
78 * For show_trace we have tree different stack to consider:
79 * - the panic stack which is used if the kernel stack has overflown
80 * - the asynchronous interrupt stack (cpu related)
81 * - the synchronous kernel stack (process related)
82 * The stack trace can start at any of the three stack and can potentially
83 * touch all of them. The order is: panic stack, async stack, sync stack.
86 __show_trace(unsigned long sp
, unsigned long low
, unsigned long high
)
88 struct stack_frame
*sf
;
92 sp
= sp
& PSW_ADDR_INSN
;
93 if (sp
< low
|| sp
> high
- sizeof(*sf
))
95 sf
= (struct stack_frame
*) sp
;
96 printk("([<%016lx>] ", sf
->gprs
[8] & PSW_ADDR_INSN
);
97 print_symbol("%s)\n", sf
->gprs
[8] & PSW_ADDR_INSN
);
98 /* Follow the backchain. */
101 sp
= sf
->back_chain
& PSW_ADDR_INSN
;
104 if (sp
<= low
|| sp
> high
- sizeof(*sf
))
106 sf
= (struct stack_frame
*) sp
;
107 printk(" [<%016lx>] ", sf
->gprs
[8] & PSW_ADDR_INSN
);
108 print_symbol("%s\n", sf
->gprs
[8] & PSW_ADDR_INSN
);
110 /* Zero backchain detected, check for interrupt frame. */
111 sp
= (unsigned long) (sf
+ 1);
112 if (sp
<= low
|| sp
> high
- sizeof(*regs
))
114 regs
= (struct pt_regs
*) sp
;
115 printk(" [<%016lx>] ", regs
->psw
.addr
& PSW_ADDR_INSN
);
116 print_symbol("%s\n", regs
->psw
.addr
& PSW_ADDR_INSN
);
122 void show_trace(struct task_struct
*task
, unsigned long * stack
)
124 register unsigned long __r15
asm ("15");
127 sp
= (unsigned long) stack
;
129 sp
= task
? task
->thread
.ksp
: __r15
;
130 printk("Call Trace:\n");
131 #ifdef CONFIG_CHECK_STACK
132 sp
= __show_trace(sp
, S390_lowcore
.panic_stack
- 4096,
133 S390_lowcore
.panic_stack
);
135 sp
= __show_trace(sp
, S390_lowcore
.async_stack
- ASYNC_SIZE
,
136 S390_lowcore
.async_stack
);
138 __show_trace(sp
, (unsigned long) task_stack_page(task
),
139 (unsigned long) task_stack_page(task
) + THREAD_SIZE
);
141 __show_trace(sp
, S390_lowcore
.thread_info
,
142 S390_lowcore
.thread_info
+ THREAD_SIZE
);
146 void show_stack(struct task_struct
*task
, unsigned long *sp
)
148 register unsigned long * __r15
asm ("15");
149 unsigned long *stack
;
153 stack
= task
? (unsigned long *) task
->thread
.ksp
: __r15
;
157 for (i
= 0; i
< kstack_depth_to_print
; i
++) {
158 if (((addr_t
) stack
& (THREAD_SIZE
-1)) == 0)
160 if (i
&& ((i
* sizeof (long) % 32) == 0))
162 printk("%p ", (void *)*stack
++);
165 show_trace(task
, sp
);
169 * The architecture-independent dump_stack generator
171 void dump_stack(void)
176 EXPORT_SYMBOL(dump_stack
);
178 void show_registers(struct pt_regs
*regs
)
184 mode
= (regs
->psw
.mask
& PSW_MASK_PSTATE
) ? "User" : "Krnl";
185 printk("%s PSW : %p %p",
186 mode
, (void *) regs
->psw
.mask
,
187 (void *) regs
->psw
.addr
);
188 print_symbol(" (%s)\n", regs
->psw
.addr
& PSW_ADDR_INSN
);
189 printk("%s GPRS: " FOURLONG
, mode
,
190 regs
->gprs
[0], regs
->gprs
[1], regs
->gprs
[2], regs
->gprs
[3]);
192 regs
->gprs
[4], regs
->gprs
[5], regs
->gprs
[6], regs
->gprs
[7]);
194 regs
->gprs
[8], regs
->gprs
[9], regs
->gprs
[10], regs
->gprs
[11]);
196 regs
->gprs
[12], regs
->gprs
[13], regs
->gprs
[14], regs
->gprs
[15]);
199 /* FIXME: this isn't needed any more but it changes the ksymoops
200 * input. To remove or not to remove ... */
201 save_access_regs(regs
->acrs
);
202 printk("%s ACRS: %08x %08x %08x %08x\n", mode
,
203 regs
->acrs
[0], regs
->acrs
[1], regs
->acrs
[2], regs
->acrs
[3]);
204 printk(" %08x %08x %08x %08x\n",
205 regs
->acrs
[4], regs
->acrs
[5], regs
->acrs
[6], regs
->acrs
[7]);
206 printk(" %08x %08x %08x %08x\n",
207 regs
->acrs
[8], regs
->acrs
[9], regs
->acrs
[10], regs
->acrs
[11]);
208 printk(" %08x %08x %08x %08x\n",
209 regs
->acrs
[12], regs
->acrs
[13], regs
->acrs
[14], regs
->acrs
[15]);
213 * Print the first 20 byte of the instruction stream at the
217 if (regs
->psw
.mask
& PSW_MASK_PSTATE
)
221 printk("%s Code: ", mode
);
222 for (i
= 0; i
< 20; i
++) {
224 if (__get_user(c
, (char __user
*)(regs
->psw
.addr
+ i
))) {
235 /* This is called from fs/proc/array.c */
236 char *task_show_regs(struct task_struct
*task
, char *buffer
)
238 struct pt_regs
*regs
;
240 regs
= task_pt_regs(task
);
241 buffer
+= sprintf(buffer
, "task: %p, ksp: %p\n",
242 task
, (void *)task
->thread
.ksp
);
243 buffer
+= sprintf(buffer
, "User PSW : %p %p\n",
244 (void *) regs
->psw
.mask
, (void *)regs
->psw
.addr
);
246 buffer
+= sprintf(buffer
, "User GPRS: " FOURLONG
,
247 regs
->gprs
[0], regs
->gprs
[1],
248 regs
->gprs
[2], regs
->gprs
[3]);
249 buffer
+= sprintf(buffer
, " " FOURLONG
,
250 regs
->gprs
[4], regs
->gprs
[5],
251 regs
->gprs
[6], regs
->gprs
[7]);
252 buffer
+= sprintf(buffer
, " " FOURLONG
,
253 regs
->gprs
[8], regs
->gprs
[9],
254 regs
->gprs
[10], regs
->gprs
[11]);
255 buffer
+= sprintf(buffer
, " " FOURLONG
,
256 regs
->gprs
[12], regs
->gprs
[13],
257 regs
->gprs
[14], regs
->gprs
[15]);
258 buffer
+= sprintf(buffer
, "User ACRS: %08x %08x %08x %08x\n",
259 task
->thread
.acrs
[0], task
->thread
.acrs
[1],
260 task
->thread
.acrs
[2], task
->thread
.acrs
[3]);
261 buffer
+= sprintf(buffer
, " %08x %08x %08x %08x\n",
262 task
->thread
.acrs
[4], task
->thread
.acrs
[5],
263 task
->thread
.acrs
[6], task
->thread
.acrs
[7]);
264 buffer
+= sprintf(buffer
, " %08x %08x %08x %08x\n",
265 task
->thread
.acrs
[8], task
->thread
.acrs
[9],
266 task
->thread
.acrs
[10], task
->thread
.acrs
[11]);
267 buffer
+= sprintf(buffer
, " %08x %08x %08x %08x\n",
268 task
->thread
.acrs
[12], task
->thread
.acrs
[13],
269 task
->thread
.acrs
[14], task
->thread
.acrs
[15]);
273 DEFINE_SPINLOCK(die_lock
);
275 void die(const char * str
, struct pt_regs
* regs
, long err
)
277 static int die_counter
;
281 spin_lock_irq(&die_lock
);
283 printk("%s: %04lx [#%d]\n", str
, err
& 0xffff, ++die_counter
);
286 spin_unlock_irq(&die_lock
);
288 panic("Fatal exception in interrupt");
290 panic("Fatal exception: panic_on_oops");
295 report_user_fault(long interruption_code
, struct pt_regs
*regs
)
297 #if defined(CONFIG_SYSCTL)
298 if (!sysctl_userprocess_debug
)
301 #if defined(CONFIG_SYSCTL) || defined(CONFIG_PROCESS_DEBUG)
302 printk("User process fault: interruption code 0x%lX\n",
308 static void inline do_trap(long interruption_code
, int signr
, char *str
,
309 struct pt_regs
*regs
, siginfo_t
*info
)
312 * We got all needed information from the lowcore and can
313 * now safely switch on interrupts.
315 if (regs
->psw
.mask
& PSW_MASK_PSTATE
)
318 if (regs
->psw
.mask
& PSW_MASK_PSTATE
) {
319 struct task_struct
*tsk
= current
;
321 tsk
->thread
.trap_no
= interruption_code
& 0xffff;
322 force_sig_info(signr
, info
, tsk
);
323 report_user_fault(interruption_code
, regs
);
325 const struct exception_table_entry
*fixup
;
326 fixup
= search_exception_tables(regs
->psw
.addr
& PSW_ADDR_INSN
);
328 regs
->psw
.addr
= fixup
->fixup
| PSW_ADDR_AMODE
;
330 die(str
, regs
, interruption_code
);
334 static inline void *get_check_address(struct pt_regs
*regs
)
336 return (void *)((regs
->psw
.addr
-S390_lowcore
.pgm_ilc
) & PSW_ADDR_INSN
);
339 void do_single_step(struct pt_regs
*regs
)
341 if ((current
->ptrace
& PT_PTRACED
) != 0)
342 force_sig(SIGTRAP
, current
);
346 default_trap_handler(struct pt_regs
* regs
, long interruption_code
)
348 if (regs
->psw
.mask
& PSW_MASK_PSTATE
) {
351 report_user_fault(interruption_code
, regs
);
353 die("Unknown program exception", regs
, interruption_code
);
356 #define DO_ERROR_INFO(signr, str, name, sicode, siaddr) \
357 asmlinkage void name(struct pt_regs * regs, long interruption_code) \
360 info.si_signo = signr; \
362 info.si_code = sicode; \
363 info.si_addr = (void *)siaddr; \
364 do_trap(interruption_code, signr, str, regs, &info); \
367 DO_ERROR_INFO(SIGILL
, "addressing exception", addressing_exception
,
368 ILL_ILLADR
, get_check_address(regs
))
369 DO_ERROR_INFO(SIGILL
, "execute exception", execute_exception
,
370 ILL_ILLOPN
, get_check_address(regs
))
371 DO_ERROR_INFO(SIGFPE
, "fixpoint divide exception", divide_exception
,
372 FPE_INTDIV
, get_check_address(regs
))
373 DO_ERROR_INFO(SIGFPE
, "fixpoint overflow exception", overflow_exception
,
374 FPE_INTOVF
, get_check_address(regs
))
375 DO_ERROR_INFO(SIGFPE
, "HFP overflow exception", hfp_overflow_exception
,
376 FPE_FLTOVF
, get_check_address(regs
))
377 DO_ERROR_INFO(SIGFPE
, "HFP underflow exception", hfp_underflow_exception
,
378 FPE_FLTUND
, get_check_address(regs
))
379 DO_ERROR_INFO(SIGFPE
, "HFP significance exception", hfp_significance_exception
,
380 FPE_FLTRES
, get_check_address(regs
))
381 DO_ERROR_INFO(SIGFPE
, "HFP divide exception", hfp_divide_exception
,
382 FPE_FLTDIV
, get_check_address(regs
))
383 DO_ERROR_INFO(SIGFPE
, "HFP square root exception", hfp_sqrt_exception
,
384 FPE_FLTINV
, get_check_address(regs
))
385 DO_ERROR_INFO(SIGILL
, "operand exception", operand_exception
,
386 ILL_ILLOPN
, get_check_address(regs
))
387 DO_ERROR_INFO(SIGILL
, "privileged operation", privileged_op
,
388 ILL_PRVOPC
, get_check_address(regs
))
389 DO_ERROR_INFO(SIGILL
, "special operation exception", special_op_exception
,
390 ILL_ILLOPN
, get_check_address(regs
))
391 DO_ERROR_INFO(SIGILL
, "translation exception", translation_exception
,
392 ILL_ILLOPN
, get_check_address(regs
))
395 do_fp_trap(struct pt_regs
*regs
, void *location
,
396 int fpc
, long interruption_code
)
400 si
.si_signo
= SIGFPE
;
402 si
.si_addr
= location
;
404 /* FPC[2] is Data Exception Code */
405 if ((fpc
& 0x00000300) == 0) {
406 /* bits 6 and 7 of DXC are 0 iff IEEE exception */
407 if (fpc
& 0x8000) /* invalid fp operation */
408 si
.si_code
= FPE_FLTINV
;
409 else if (fpc
& 0x4000) /* div by 0 */
410 si
.si_code
= FPE_FLTDIV
;
411 else if (fpc
& 0x2000) /* overflow */
412 si
.si_code
= FPE_FLTOVF
;
413 else if (fpc
& 0x1000) /* underflow */
414 si
.si_code
= FPE_FLTUND
;
415 else if (fpc
& 0x0800) /* inexact */
416 si
.si_code
= FPE_FLTRES
;
418 current
->thread
.ieee_instruction_pointer
= (addr_t
) location
;
419 do_trap(interruption_code
, SIGFPE
,
420 "floating point exception", regs
, &si
);
423 asmlinkage
void illegal_op(struct pt_regs
* regs
, long interruption_code
)
430 location
= (__u16
*) get_check_address(regs
);
433 * We got all needed information from the lowcore and can
434 * now safely switch on interrupts.
436 if (regs
->psw
.mask
& PSW_MASK_PSTATE
)
439 if (regs
->psw
.mask
& PSW_MASK_PSTATE
) {
440 get_user(*((__u16
*) opcode
), (__u16 __user
*) location
);
441 if (*((__u16
*) opcode
) == S390_BREAKPOINT_U16
) {
442 if (current
->ptrace
& PT_PTRACED
)
443 force_sig(SIGTRAP
, current
);
446 #ifdef CONFIG_MATHEMU
447 } else if (opcode
[0] == 0xb3) {
448 get_user(*((__u16
*) (opcode
+2)), location
+1);
449 signal
= math_emu_b3(opcode
, regs
);
450 } else if (opcode
[0] == 0xed) {
451 get_user(*((__u32
*) (opcode
+2)),
452 (__u32
*)(location
+1));
453 signal
= math_emu_ed(opcode
, regs
);
454 } else if (*((__u16
*) opcode
) == 0xb299) {
455 get_user(*((__u16
*) (opcode
+2)), location
+1);
456 signal
= math_emu_srnm(opcode
, regs
);
457 } else if (*((__u16
*) opcode
) == 0xb29c) {
458 get_user(*((__u16
*) (opcode
+2)), location
+1);
459 signal
= math_emu_stfpc(opcode
, regs
);
460 } else if (*((__u16
*) opcode
) == 0xb29d) {
461 get_user(*((__u16
*) (opcode
+2)), location
+1);
462 signal
= math_emu_lfpc(opcode
, regs
);
469 #ifdef CONFIG_MATHEMU
470 if (signal
== SIGFPE
)
471 do_fp_trap(regs
, location
,
472 current
->thread
.fp_regs
.fpc
, interruption_code
);
473 else if (signal
== SIGSEGV
) {
474 info
.si_signo
= signal
;
476 info
.si_code
= SEGV_MAPERR
;
477 info
.si_addr
= (void *) location
;
478 do_trap(interruption_code
, signal
,
479 "user address fault", regs
, &info
);
483 info
.si_signo
= signal
;
485 info
.si_code
= ILL_ILLOPC
;
486 info
.si_addr
= (void __user
*) location
;
487 do_trap(interruption_code
, signal
,
488 "illegal operation", regs
, &info
);
493 #ifdef CONFIG_MATHEMU
495 specification_exception(struct pt_regs
* regs
, long interruption_code
)
498 __u16
*location
= NULL
;
501 location
= (__u16
*) get_check_address(regs
);
504 * We got all needed information from the lowcore and can
505 * now safely switch on interrupts.
507 if (regs
->psw
.mask
& PSW_MASK_PSTATE
)
510 if (regs
->psw
.mask
& PSW_MASK_PSTATE
) {
511 get_user(*((__u16
*) opcode
), location
);
513 case 0x28: /* LDR Rx,Ry */
514 signal
= math_emu_ldr(opcode
);
516 case 0x38: /* LER Rx,Ry */
517 signal
= math_emu_ler(opcode
);
519 case 0x60: /* STD R,D(X,B) */
520 get_user(*((__u16
*) (opcode
+2)), location
+1);
521 signal
= math_emu_std(opcode
, regs
);
523 case 0x68: /* LD R,D(X,B) */
524 get_user(*((__u16
*) (opcode
+2)), location
+1);
525 signal
= math_emu_ld(opcode
, regs
);
527 case 0x70: /* STE R,D(X,B) */
528 get_user(*((__u16
*) (opcode
+2)), location
+1);
529 signal
= math_emu_ste(opcode
, regs
);
531 case 0x78: /* LE R,D(X,B) */
532 get_user(*((__u16
*) (opcode
+2)), location
+1);
533 signal
= math_emu_le(opcode
, regs
);
542 if (signal
== SIGFPE
)
543 do_fp_trap(regs
, location
,
544 current
->thread
.fp_regs
.fpc
, interruption_code
);
547 info
.si_signo
= signal
;
549 info
.si_code
= ILL_ILLOPN
;
550 info
.si_addr
= location
;
551 do_trap(interruption_code
, signal
,
552 "specification exception", regs
, &info
);
556 DO_ERROR_INFO(SIGILL
, "specification exception", specification_exception
,
557 ILL_ILLOPN
, get_check_address(regs
));
560 asmlinkage
void data_exception(struct pt_regs
* regs
, long interruption_code
)
565 location
= (__u16
*) get_check_address(regs
);
568 * We got all needed information from the lowcore and can
569 * now safely switch on interrupts.
571 if (regs
->psw
.mask
& PSW_MASK_PSTATE
)
574 if (MACHINE_HAS_IEEE
)
575 __asm__
volatile ("stfpc %0\n\t"
576 : "=m" (current
->thread
.fp_regs
.fpc
));
578 #ifdef CONFIG_MATHEMU
579 else if (regs
->psw
.mask
& PSW_MASK_PSTATE
) {
581 get_user(*((__u16
*) opcode
), location
);
583 case 0x28: /* LDR Rx,Ry */
584 signal
= math_emu_ldr(opcode
);
586 case 0x38: /* LER Rx,Ry */
587 signal
= math_emu_ler(opcode
);
589 case 0x60: /* STD R,D(X,B) */
590 get_user(*((__u16
*) (opcode
+2)), location
+1);
591 signal
= math_emu_std(opcode
, regs
);
593 case 0x68: /* LD R,D(X,B) */
594 get_user(*((__u16
*) (opcode
+2)), location
+1);
595 signal
= math_emu_ld(opcode
, regs
);
597 case 0x70: /* STE R,D(X,B) */
598 get_user(*((__u16
*) (opcode
+2)), location
+1);
599 signal
= math_emu_ste(opcode
, regs
);
601 case 0x78: /* LE R,D(X,B) */
602 get_user(*((__u16
*) (opcode
+2)), location
+1);
603 signal
= math_emu_le(opcode
, regs
);
606 get_user(*((__u16
*) (opcode
+2)), location
+1);
607 signal
= math_emu_b3(opcode
, regs
);
610 get_user(*((__u32
*) (opcode
+2)),
611 (__u32
*)(location
+1));
612 signal
= math_emu_ed(opcode
, regs
);
615 if (opcode
[1] == 0x99) {
616 get_user(*((__u16
*) (opcode
+2)), location
+1);
617 signal
= math_emu_srnm(opcode
, regs
);
618 } else if (opcode
[1] == 0x9c) {
619 get_user(*((__u16
*) (opcode
+2)), location
+1);
620 signal
= math_emu_stfpc(opcode
, regs
);
621 } else if (opcode
[1] == 0x9d) {
622 get_user(*((__u16
*) (opcode
+2)), location
+1);
623 signal
= math_emu_lfpc(opcode
, regs
);
633 if (current
->thread
.fp_regs
.fpc
& FPC_DXC_MASK
)
637 if (signal
== SIGFPE
)
638 do_fp_trap(regs
, location
,
639 current
->thread
.fp_regs
.fpc
, interruption_code
);
642 info
.si_signo
= signal
;
644 info
.si_code
= ILL_ILLOPN
;
645 info
.si_addr
= location
;
646 do_trap(interruption_code
, signal
,
647 "data exception", regs
, &info
);
651 asmlinkage
void space_switch_exception(struct pt_regs
* regs
, long int_code
)
655 /* Set user psw back to home space mode. */
656 if (regs
->psw
.mask
& PSW_MASK_PSTATE
)
657 regs
->psw
.mask
|= PSW_ASC_HOME
;
659 info
.si_signo
= SIGILL
;
661 info
.si_code
= ILL_PRVOPC
;
662 info
.si_addr
= get_check_address(regs
);
663 do_trap(int_code
, SIGILL
, "space switch event", regs
, &info
);
666 asmlinkage
void kernel_stack_overflow(struct pt_regs
* regs
)
669 printk("Kernel stack overflow.\n");
672 panic("Corrupt kernel stack, can't continue.");
675 /* init is done in lowcore.S and head.S */
677 void __init
trap_init(void)
681 for (i
= 0; i
< 128; i
++)
682 pgm_check_table
[i
] = &default_trap_handler
;
683 pgm_check_table
[1] = &illegal_op
;
684 pgm_check_table
[2] = &privileged_op
;
685 pgm_check_table
[3] = &execute_exception
;
686 pgm_check_table
[4] = &do_protection_exception
;
687 pgm_check_table
[5] = &addressing_exception
;
688 pgm_check_table
[6] = &specification_exception
;
689 pgm_check_table
[7] = &data_exception
;
690 pgm_check_table
[8] = &overflow_exception
;
691 pgm_check_table
[9] = ÷_exception
;
692 pgm_check_table
[0x0A] = &overflow_exception
;
693 pgm_check_table
[0x0B] = ÷_exception
;
694 pgm_check_table
[0x0C] = &hfp_overflow_exception
;
695 pgm_check_table
[0x0D] = &hfp_underflow_exception
;
696 pgm_check_table
[0x0E] = &hfp_significance_exception
;
697 pgm_check_table
[0x0F] = &hfp_divide_exception
;
698 pgm_check_table
[0x10] = &do_dat_exception
;
699 pgm_check_table
[0x11] = &do_dat_exception
;
700 pgm_check_table
[0x12] = &translation_exception
;
701 pgm_check_table
[0x13] = &special_op_exception
;
703 pgm_check_table
[0x38] = &do_dat_exception
;
704 pgm_check_table
[0x39] = &do_dat_exception
;
705 pgm_check_table
[0x3A] = &do_dat_exception
;
706 pgm_check_table
[0x3B] = &do_dat_exception
;
707 #endif /* CONFIG_64BIT */
708 pgm_check_table
[0x15] = &operand_exception
;
709 pgm_check_table
[0x1C] = &space_switch_exception
;
710 pgm_check_table
[0x1D] = &hfp_sqrt_exception
;
711 pgm_check_table
[0x40] = &do_monitor_call
;
716 * Try to get pfault pseudo page faults going.
718 if (register_early_external_interrupt(0x2603, pfault_interrupt
,
719 &ext_int_pfault
) != 0)
720 panic("Couldn't request external interrupt 0x2603");
722 if (pfault_init() == 0)
725 /* Tough luck, no pfault. */
726 unregister_early_external_interrupt(0x2603, pfault_interrupt
,