1 #ifndef _ASM_POWERPC_EXCEPTION_H
2 #define _ASM_POWERPC_EXCEPTION_H
4 * Extracted from head_64.S
7 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
9 * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
10 * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
11 * Adapted for Power Macintosh by Paul Mackerras.
12 * Low-level exception handlers and MMU support
13 * rewritten by Paul Mackerras.
14 * Copyright (C) 1996 Paul Mackerras.
16 * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
17 * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com
19 * This file contains the low-level support and setup for the
20 * PowerPC-64 platform, including trap and interrupt dispatch.
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License
24 * as published by the Free Software Foundation; either version
25 * 2 of the License, or (at your option) any later version.
28 * The following macros define the code that appears as
29 * the prologue to each of the exception handlers. They
30 * are split into two parts to allow a single kernel binary
31 * to be used for pSeries and iSeries.
33 * We make as much of the exception code common between native
34 * exception handlers (including pSeries LPAR) and iSeries LPAR
35 * implementations as possible.
50 #define EX_PPR 88 /* SMT thread status register (priority) */
53 #define STF_ENTRY_BARRIER_SLOT \
54 STF_ENTRY_BARRIER_FIXUP_SECTION; \
59 #define STF_EXIT_BARRIER_SLOT \
60 STF_EXIT_BARRIER_FIXUP_SECTION; \
68 #define ENTRY_FLUSH_SLOT \
69 ENTRY_FLUSH_FIXUP_SECTION; \
75 * r10 must be free to use, r13 must be paca
77 #define INTERRUPT_TO_KERNEL \
78 STF_ENTRY_BARRIER_SLOT; \
82 * Macros for annotating the expected destination of (h)rfid
84 * The nop instructions allow us to insert one or more instructions to flush the
85 * L1-D cache when returning to userspace or a guest.
87 #define RFI_FLUSH_SLOT \
88 RFI_FLUSH_FIXUP_SECTION; \
93 #define RFI_TO_KERNEL \
97 STF_EXIT_BARRIER_SLOT; \
102 #define RFI_TO_USER_OR_KERNEL \
103 STF_EXIT_BARRIER_SLOT; \
108 #define RFI_TO_GUEST \
109 STF_EXIT_BARRIER_SLOT; \
114 #define HRFI_TO_KERNEL \
117 #define HRFI_TO_USER \
118 STF_EXIT_BARRIER_SLOT; \
121 b hrfi_flush_fallback
123 #define HRFI_TO_USER_OR_KERNEL \
124 STF_EXIT_BARRIER_SLOT; \
127 b hrfi_flush_fallback
129 #define HRFI_TO_GUEST \
130 STF_EXIT_BARRIER_SLOT; \
133 b hrfi_flush_fallback
135 #define HRFI_TO_UNKNOWN \
136 STF_EXIT_BARRIER_SLOT; \
139 b hrfi_flush_fallback
141 #ifdef CONFIG_RELOCATABLE
142 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
143 ld r12,PACAKBASE(r13); /* get high part of &label */ \
144 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
145 LOAD_HANDLER(r12,label); \
147 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
149 mtmsrd r10,1; /* Set RI (EE=0) */ \
152 /* If not relocatable, we can jump directly -- and save messing with LR */
153 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
154 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
155 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
157 mtmsrd r10,1; /* Set RI (EE=0) */ \
160 #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
161 __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
164 * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on
165 * so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which
166 * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr.
168 #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \
169 EXCEPTION_PROLOG_0(area); \
170 EXCEPTION_PROLOG_1(area, extra, vec); \
171 EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)
174 * We're short on space and time in the exception prolog, so we can't
175 * use the normal SET_REG_IMMEDIATE macro. Normally we just need the
176 * low halfword of the address, but for Kdump we need the whole low
179 #define LOAD_HANDLER(reg, label) \
180 /* Handlers must be within 64K of kbase, which must be 64k aligned */ \
181 ori reg,reg,(label)-_stext; /* virt addr of handler ... */
183 /* Exception register prefixes */
187 #if defined(CONFIG_RELOCATABLE)
189 * If we support interrupts with relocation on AND we're a relocatable kernel,
190 * we need to use CTR to get to the 2nd level handler. So, save/restore it
193 #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13)
194 #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13)
195 #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg
197 /* ...else CTR is unused and in register. */
198 #define SAVE_CTR(reg, area)
199 #define GET_CTR(reg, area) mfctr reg
200 #define RESTORE_CTR(reg, area)
204 * PPR save/restore macros used in exceptions_64s.S
205 * Used for P7 or later processors
207 #define SAVE_PPR(area, ra, rb) \
208 BEGIN_FTR_SECTION_NESTED(940) \
209 ld ra,PACACURRENT(r13); \
210 ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \
211 std rb,TASKTHREADPPR(ra); \
212 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
214 #define RESTORE_PPR_PACA(area, ra) \
215 BEGIN_FTR_SECTION_NESTED(941) \
216 ld ra,area+EX_PPR(r13); \
218 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
221 * Increase the priority on systems where PPR save/restore is not
222 * implemented/ supported.
224 #define HMT_MEDIUM_PPR_DISCARD \
225 BEGIN_FTR_SECTION_NESTED(942) \
227 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,942) /*non P7*/
230 * Get an SPR into a register if the CPU has the given feature
232 #define OPT_GET_SPR(ra, spr, ftr) \
233 BEGIN_FTR_SECTION_NESTED(943) \
235 END_FTR_SECTION_NESTED(ftr,ftr,943)
238 * Set an SPR from a register if the CPU has the given feature
240 #define OPT_SET_SPR(ra, spr, ftr) \
241 BEGIN_FTR_SECTION_NESTED(943) \
243 END_FTR_SECTION_NESTED(ftr,ftr,943)
246 * Save a register to the PACA if the CPU has the given feature
248 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \
249 BEGIN_FTR_SECTION_NESTED(943) \
250 std ra,offset(r13); \
251 END_FTR_SECTION_NESTED(ftr,ftr,943)
253 #define EXCEPTION_PROLOG_0(area) \
255 std r9,area+EX_R9(r13); /* save r9 */ \
256 OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \
258 std r10,area+EX_R10(r13); /* save r10 - r12 */ \
259 OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR)
261 #define __EXCEPTION_PROLOG_1(area, extra, vec) \
262 OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \
263 OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \
264 INTERRUPT_TO_KERNEL; \
265 SAVE_CTR(r10, area); \
268 std r11,area+EX_R11(r13); \
269 std r12,area+EX_R12(r13); \
271 std r10,area+EX_R13(r13)
272 #define EXCEPTION_PROLOG_1(area, extra, vec) \
273 __EXCEPTION_PROLOG_1(area, extra, vec)
275 #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \
276 ld r12,PACAKBASE(r13); /* get high part of &label */ \
277 ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \
278 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
279 LOAD_HANDLER(r12,label) \
280 mtspr SPRN_##h##SRR0,r12; \
281 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
282 mtspr SPRN_##h##SRR1,r10; \
284 b . /* prevent speculative execution */
285 #define EXCEPTION_PROLOG_PSERIES_1(label, h) \
286 __EXCEPTION_PROLOG_PSERIES_1(label, h)
288 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \
289 EXCEPTION_PROLOG_0(area); \
290 EXCEPTION_PROLOG_1(area, extra, vec); \
291 EXCEPTION_PROLOG_PSERIES_1(label, h);
293 #define __KVMTEST(n) \
294 lbz r10,HSTATE_IN_GUEST(r13); \
298 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
300 * If hv is possible, interrupts come into to the hv version
301 * of the kvmppc_interrupt code, which then jumps to the PR handler,
302 * kvmppc_interrupt_pr, if the guest is a PR guest.
304 #define kvmppc_interrupt kvmppc_interrupt_hv
306 #define kvmppc_interrupt kvmppc_interrupt_pr
309 #define __KVM_HANDLER(area, h, n) \
311 BEGIN_FTR_SECTION_NESTED(947) \
312 ld r10,area+EX_CFAR(r13); \
313 std r10,HSTATE_CFAR(r13); \
314 END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \
315 BEGIN_FTR_SECTION_NESTED(948) \
316 ld r10,area+EX_PPR(r13); \
317 std r10,HSTATE_PPR(r13); \
318 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \
319 ld r10,area+EX_R10(r13); \
320 stw r9,HSTATE_SCRATCH1(r13); \
321 ld r9,area+EX_R9(r13); \
322 std r12,HSTATE_SCRATCH0(r13); \
326 #define __KVM_HANDLER_SKIP(area, h, n) \
328 cmpwi r10,KVM_GUEST_MODE_SKIP; \
329 ld r10,area+EX_R10(r13); \
331 stw r9,HSTATE_SCRATCH1(r13); \
332 BEGIN_FTR_SECTION_NESTED(948) \
333 ld r9,area+EX_PPR(r13); \
334 std r9,HSTATE_PPR(r13); \
335 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \
336 ld r9,area+EX_R9(r13); \
337 std r12,HSTATE_SCRATCH0(r13); \
339 b kvmppc_interrupt; \
340 89: mtocrf 0x80,r9; \
341 ld r9,area+EX_R9(r13); \
342 b kvmppc_skip_##h##interrupt
344 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
345 #define KVMTEST(n) __KVMTEST(n)
346 #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n)
347 #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
351 #define KVM_HANDLER(area, h, n)
352 #define KVM_HANDLER_SKIP(area, h, n)
355 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
356 #define KVMTEST_PR(n) __KVMTEST(n)
357 #define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n)
358 #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
361 #define KVMTEST_PR(n)
362 #define KVM_HANDLER_PR(area, h, n)
363 #define KVM_HANDLER_PR_SKIP(area, h, n)
369 * The common exception prolog is used for all except a few exceptions
370 * such as a segment miss on a kernel address. We have to be prepared
371 * to take another exception from the point where we first touch the
372 * kernel stack onwards.
374 * On entry r13 points to the paca, r9-r13 are saved in the paca,
375 * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
376 * SRR1, and relocation is on.
378 #define EXCEPTION_PROLOG_COMMON(n, area) \
379 andi. r10,r12,MSR_PR; /* See if coming from user */ \
380 mr r10,r1; /* Save r1 */ \
381 subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \
383 ld r1,PACAKSAVE(r13); /* kernel stack to use */ \
384 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \
385 blt+ cr1,3f; /* abort if it is */ \
386 li r1,(n); /* will be reloaded later */ \
387 sth r1,PACA_TRAP_SAVE(r13); \
388 std r3,area+EX_R3(r13); \
389 addi r3,r13,area; /* r3 -> where regs are saved*/ \
390 RESTORE_CTR(r1, area); \
392 3: std r9,_CCR(r1); /* save CR in stackframe */ \
393 std r11,_NIP(r1); /* save SRR0 in stackframe */ \
394 std r12,_MSR(r1); /* save SRR1 in stackframe */ \
395 std r10,0(r1); /* make stack chain pointer */ \
396 std r0,GPR0(r1); /* save r0 in stackframe */ \
397 std r10,GPR1(r1); /* save r1 in stackframe */ \
398 beq 4f; /* if from kernel mode */ \
399 ACCOUNT_CPU_USER_ENTRY(r9, r10); \
400 SAVE_PPR(area, r9, r10); \
401 4: EXCEPTION_PROLOG_COMMON_2(area) \
402 EXCEPTION_PROLOG_COMMON_3(n) \
405 /* Save original regs values from save area to stack frame. */
406 #define EXCEPTION_PROLOG_COMMON_2(area) \
407 ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \
408 ld r10,area+EX_R10(r13); \
411 ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \
412 ld r10,area+EX_R12(r13); \
413 ld r11,area+EX_R13(r13); \
417 BEGIN_FTR_SECTION_NESTED(66); \
418 ld r10,area+EX_CFAR(r13); \
419 std r10,ORIG_GPR3(r1); \
420 END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
421 GET_CTR(r10, area); \
424 #define EXCEPTION_PROLOG_COMMON_3(n) \
425 std r2,GPR2(r1); /* save r2 in stackframe */ \
426 SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
427 SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
428 mflr r9; /* Get LR, later save to stack */ \
429 ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
431 lbz r10,PACASOFTIRQEN(r13); \
432 mfspr r11,SPRN_XER; /* save XER in stackframe */ \
436 std r9,_TRAP(r1); /* set trap number */ \
438 ld r11,exception_marker@toc(r2); \
439 std r10,RESULT(r1); /* clear regs->result */ \
440 std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */
445 #define STD_EXCEPTION_PSERIES(loc, vec, label) \
447 .globl label##_pSeries; \
449 HMT_MEDIUM_PPR_DISCARD; \
450 SET_SCRATCH0(r13); /* save r13 */ \
451 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
452 EXC_STD, KVMTEST_PR, vec)
454 /* Version of above for when we have to branch out-of-line */
455 #define STD_EXCEPTION_PSERIES_OOL(vec, label) \
456 .globl label##_pSeries; \
458 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \
459 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD)
461 #define STD_EXCEPTION_HV(loc, vec, label) \
465 HMT_MEDIUM_PPR_DISCARD; \
466 SET_SCRATCH0(r13); /* save r13 */ \
467 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
468 EXC_HV, KVMTEST, vec)
470 /* Version of above for when we have to branch out-of-line */
471 #define STD_EXCEPTION_HV_OOL(vec, label) \
474 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \
475 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV)
477 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \
479 .globl label##_relon_pSeries; \
480 label##_relon_pSeries: \
481 HMT_MEDIUM_PPR_DISCARD; \
482 /* No guest interrupts come through here */ \
483 SET_SCRATCH0(r13); /* save r13 */ \
484 EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
485 EXC_STD, NOTEST, vec)
487 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \
488 .globl label##_relon_pSeries; \
489 label##_relon_pSeries: \
490 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \
491 EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD)
493 #define STD_RELON_EXCEPTION_HV(loc, vec, label) \
495 .globl label##_relon_hv; \
497 HMT_MEDIUM_PPR_DISCARD; \
498 /* No guest interrupts come through here */ \
499 SET_SCRATCH0(r13); /* save r13 */ \
500 EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
503 #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \
504 .globl label##_relon_hv; \
506 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \
507 EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV)
509 /* This associate vector numbers with bits in paca->irq_happened */
510 #define SOFTEN_VALUE_0x500 PACA_IRQ_EE
511 #define SOFTEN_VALUE_0x502 PACA_IRQ_EE
512 #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC
513 #define SOFTEN_VALUE_0x982 PACA_IRQ_DEC
514 #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL
515 #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL
516 #define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL
517 #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI
518 #define SOFTEN_VALUE_0xe62 PACA_IRQ_HMI
520 #define __SOFTEN_TEST(h, vec) \
521 lbz r10,PACASOFTIRQEN(r13); \
523 li r10,SOFTEN_VALUE_##vec; \
524 beq masked_##h##interrupt
525 #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec)
527 #define SOFTEN_TEST_PR(vec) \
529 _SOFTEN_TEST(EXC_STD, vec)
531 #define SOFTEN_TEST_HV(vec) \
533 _SOFTEN_TEST(EXC_HV, vec)
535 #define SOFTEN_TEST_HV_201(vec) \
537 _SOFTEN_TEST(EXC_STD, vec)
539 #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec)
540 #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec)
542 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
543 SET_SCRATCH0(r13); /* save r13 */ \
544 EXCEPTION_PROLOG_0(PACA_EXGEN); \
545 __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \
546 EXCEPTION_PROLOG_PSERIES_1(label##_common, h);
548 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
549 __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
551 #define MASKABLE_EXCEPTION_OOL(vec, label) \
552 .globl label##_ool; \
554 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec); \
555 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD);
557 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \
559 .globl label##_pSeries; \
561 HMT_MEDIUM_PPR_DISCARD; \
562 _MASKABLE_EXCEPTION_PSERIES(vec, label, \
563 EXC_STD, SOFTEN_TEST_PR)
565 #define MASKABLE_EXCEPTION_HV(loc, vec, label) \
569 _MASKABLE_EXCEPTION_PSERIES(vec, label, \
570 EXC_HV, SOFTEN_TEST_HV)
572 #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \
575 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \
576 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV);
578 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \
579 HMT_MEDIUM_PPR_DISCARD; \
580 SET_SCRATCH0(r13); /* save r13 */ \
581 EXCEPTION_PROLOG_0(PACA_EXGEN); \
582 __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \
583 EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h);
584 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \
585 __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)
587 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \
589 .globl label##_relon_pSeries; \
590 label##_relon_pSeries: \
591 _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \
592 EXC_STD, SOFTEN_NOTEST_PR)
594 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \
596 .globl label##_relon_hv; \
598 _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \
599 EXC_HV, SOFTEN_NOTEST_HV)
601 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \
602 .globl label##_relon_hv; \
604 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \
605 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV);
607 #define MASKABLE_RELON_EXCEPTION_PSERIES_OOL(vec, label) \
608 .globl label##_relon_pSeries; \
609 label##_relon_pSeries: \
610 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_PR, vec); \
611 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD)
614 * Our exception common code can be passed various "additions"
615 * to specify the behaviour of interrupts, whether to kick the
620 * This addition reconciles our actual IRQ state with the various software
621 * flags that track it. This may call C code.
623 #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11)
628 #define RUNLATCH_ON \
630 CURRENT_THREAD_INFO(r3, r1); \
631 ld r4,TI_LOCAL_FLAGS(r3); \
632 andi. r0,r4,_TLF_RUNLATCH; \
633 beql ppc64_runlatch_on_trampoline; \
634 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
636 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \
638 .globl label##_common; \
640 EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \
641 /* Volatile regs are potentially clobbered here */ \
643 addi r3,r1,STACK_FRAME_OVERHEAD; \
647 #define STD_EXCEPTION_COMMON(trap, label, hdlr) \
648 EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \
649 ADD_NVGPRS;ADD_RECONCILE)
652 * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
653 * in the idle task and therefore need the special idle handling
654 * (finish nap and runlatch)
656 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \
657 EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
658 FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
661 * When the idle code in power4_idle puts the CPU into NAP mode,
662 * it has to do so in a loop, and relies on the external interrupt
663 * and decrementer interrupt entry code to get it out of the loop.
664 * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
665 * to signal that it is in the loop and needs help to get out.
667 #ifdef CONFIG_PPC_970_NAP
670 CURRENT_THREAD_INFO(r11, r1); \
671 ld r9,TI_LOCAL_FLAGS(r11); \
672 andi. r10,r9,_TLF_NAPPING; \
673 bnel power4_fixup_nap; \
674 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
679 #endif /* _ASM_POWERPC_EXCEPTION_H */