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.
37 #include <asm/head-64.h>
38 #include <asm/feature-fixups.h>
40 /* PACA save area offsets (exgen, exmc, etc) */
51 #if defined(CONFIG_RELOCATABLE)
53 #define EX_SIZE 10 /* size in u64 units */
55 #define EX_SIZE 9 /* size in u64 units */
59 * maximum recursive depth of MCE exceptions
61 #define MAX_MCE_DEPTH 4
64 * EX_R3 is only used by the bad_stack handler. bad_stack reloads and
65 * saves DAR from SPRN_DAR, and EX_DAR is not used. So EX_R3 can overlap
70 #define STF_ENTRY_BARRIER_SLOT \
71 STF_ENTRY_BARRIER_FIXUP_SECTION; \
76 #define STF_EXIT_BARRIER_SLOT \
77 STF_EXIT_BARRIER_FIXUP_SECTION; \
86 * r10 must be free to use, r13 must be paca
88 #define INTERRUPT_TO_KERNEL \
89 STF_ENTRY_BARRIER_SLOT
92 * Macros for annotating the expected destination of (h)rfid
94 * The nop instructions allow us to insert one or more instructions to flush the
95 * L1-D cache when returning to userspace or a guest.
97 #define RFI_FLUSH_SLOT \
98 RFI_FLUSH_FIXUP_SECTION; \
103 #define RFI_TO_KERNEL \
106 #define RFI_TO_USER \
107 STF_EXIT_BARRIER_SLOT; \
112 #define RFI_TO_USER_OR_KERNEL \
113 STF_EXIT_BARRIER_SLOT; \
118 #define RFI_TO_GUEST \
119 STF_EXIT_BARRIER_SLOT; \
124 #define HRFI_TO_KERNEL \
127 #define HRFI_TO_USER \
128 STF_EXIT_BARRIER_SLOT; \
131 b hrfi_flush_fallback
133 #define HRFI_TO_USER_OR_KERNEL \
134 STF_EXIT_BARRIER_SLOT; \
137 b hrfi_flush_fallback
139 #define HRFI_TO_GUEST \
140 STF_EXIT_BARRIER_SLOT; \
143 b hrfi_flush_fallback
145 #define HRFI_TO_UNKNOWN \
146 STF_EXIT_BARRIER_SLOT; \
149 b hrfi_flush_fallback
151 #ifdef CONFIG_RELOCATABLE
152 #define __EXCEPTION_PROLOG_2_RELON(label, h) \
153 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
154 LOAD_HANDLER(r12,label); \
156 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
158 mtmsrd r10,1; /* Set RI (EE=0) */ \
161 /* If not relocatable, we can jump directly -- and save messing with LR */
162 #define __EXCEPTION_PROLOG_2_RELON(label, h) \
163 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
164 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
166 mtmsrd r10,1; /* Set RI (EE=0) */ \
169 #define EXCEPTION_PROLOG_2_RELON(label, h) \
170 __EXCEPTION_PROLOG_2_RELON(label, h)
173 * As EXCEPTION_PROLOG(), except we've already got relocation on so no need to
174 * rfid. Save LR in case we're CONFIG_RELOCATABLE, in which case
175 * EXCEPTION_PROLOG_2_RELON will be using LR.
177 #define EXCEPTION_RELON_PROLOG(area, label, h, extra, vec) \
178 SET_SCRATCH0(r13); /* save r13 */ \
179 EXCEPTION_PROLOG_0(area); \
180 EXCEPTION_PROLOG_1(area, extra, vec); \
181 EXCEPTION_PROLOG_2_RELON(label, h)
184 * We're short on space and time in the exception prolog, so we can't
185 * use the normal LOAD_REG_IMMEDIATE macro to load the address of label.
186 * Instead we get the base of the kernel from paca->kernelbase and or in the low
187 * part of label. This requires that the label be within 64KB of kernelbase, and
188 * that kernelbase be 64K aligned.
190 #define LOAD_HANDLER(reg, label) \
191 ld reg,PACAKBASE(r13); /* get high part of &label */ \
192 ori reg,reg,FIXED_SYMBOL_ABS_ADDR(label);
194 #define __LOAD_HANDLER(reg, label) \
195 ld reg,PACAKBASE(r13); \
196 ori reg,reg,(ABS_ADDR(label))@l;
199 * Branches from unrelocated code (e.g., interrupts) to labels outside
200 * head-y require >64K offsets.
202 #define __LOAD_FAR_HANDLER(reg, label) \
203 ld reg,PACAKBASE(r13); \
204 ori reg,reg,(ABS_ADDR(label))@l; \
205 addis reg,reg,(ABS_ADDR(label))@h;
207 /* Exception register prefixes */
211 #if defined(CONFIG_RELOCATABLE)
213 * If we support interrupts with relocation on AND we're a relocatable kernel,
214 * we need to use CTR to get to the 2nd level handler. So, save/restore it
217 #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13)
218 #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13)
219 #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg
221 /* ...else CTR is unused and in register. */
222 #define SAVE_CTR(reg, area)
223 #define GET_CTR(reg, area) mfctr reg
224 #define RESTORE_CTR(reg, area)
228 * PPR save/restore macros used in exceptions_64s.S
229 * Used for P7 or later processors
231 #define SAVE_PPR(area, ra) \
232 BEGIN_FTR_SECTION_NESTED(940) \
233 ld ra,area+EX_PPR(r13); /* Read PPR from paca */ \
235 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
237 #define RESTORE_PPR_PACA(area, ra) \
238 BEGIN_FTR_SECTION_NESTED(941) \
239 ld ra,area+EX_PPR(r13); \
241 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
244 * Get an SPR into a register if the CPU has the given feature
246 #define OPT_GET_SPR(ra, spr, ftr) \
247 BEGIN_FTR_SECTION_NESTED(943) \
249 END_FTR_SECTION_NESTED(ftr,ftr,943)
252 * Set an SPR from a register if the CPU has the given feature
254 #define OPT_SET_SPR(ra, spr, ftr) \
255 BEGIN_FTR_SECTION_NESTED(943) \
257 END_FTR_SECTION_NESTED(ftr,ftr,943)
260 * Save a register to the PACA if the CPU has the given feature
262 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \
263 BEGIN_FTR_SECTION_NESTED(943) \
264 std ra,offset(r13); \
265 END_FTR_SECTION_NESTED(ftr,ftr,943)
267 #define EXCEPTION_PROLOG_0(area) \
269 std r9,area+EX_R9(r13); /* save r9 */ \
270 OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \
272 std r10,area+EX_R10(r13); /* save r10 - r12 */ \
273 OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR)
275 #define __EXCEPTION_PROLOG_1_PRE(area) \
276 OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \
277 OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \
278 INTERRUPT_TO_KERNEL; \
279 SAVE_CTR(r10, area); \
282 #define __EXCEPTION_PROLOG_1_POST(area) \
283 std r11,area+EX_R11(r13); \
284 std r12,area+EX_R12(r13); \
286 std r10,area+EX_R13(r13)
289 * This version of the EXCEPTION_PROLOG_1 will carry
290 * addition parameter called "bitmask" to support
291 * checking of the interrupt maskable level in the SOFTEN_TEST.
292 * Intended to be used in MASKABLE_EXCPETION_* macros.
294 #define MASKABLE_EXCEPTION_PROLOG_1(area, extra, vec, bitmask) \
295 __EXCEPTION_PROLOG_1_PRE(area); \
296 extra(vec, bitmask); \
297 __EXCEPTION_PROLOG_1_POST(area);
300 * This version of the EXCEPTION_PROLOG_1 is intended
301 * to be used in STD_EXCEPTION* macros
303 #define _EXCEPTION_PROLOG_1(area, extra, vec) \
304 __EXCEPTION_PROLOG_1_PRE(area); \
306 __EXCEPTION_PROLOG_1_POST(area);
308 #define EXCEPTION_PROLOG_1(area, extra, vec) \
309 _EXCEPTION_PROLOG_1(area, extra, vec)
311 #define __EXCEPTION_PROLOG_2(label, h) \
312 ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \
313 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
314 LOAD_HANDLER(r12,label) \
315 mtspr SPRN_##h##SRR0,r12; \
316 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
317 mtspr SPRN_##h##SRR1,r10; \
319 b . /* prevent speculative execution */
320 #define EXCEPTION_PROLOG_2(label, h) \
321 __EXCEPTION_PROLOG_2(label, h)
323 /* _NORI variant keeps MSR_RI clear */
324 #define __EXCEPTION_PROLOG_2_NORI(label, h) \
325 ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \
326 xori r10,r10,MSR_RI; /* Clear MSR_RI */ \
327 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
328 LOAD_HANDLER(r12,label) \
329 mtspr SPRN_##h##SRR0,r12; \
330 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
331 mtspr SPRN_##h##SRR1,r10; \
333 b . /* prevent speculative execution */
335 #define EXCEPTION_PROLOG_2_NORI(label, h) \
336 __EXCEPTION_PROLOG_2_NORI(label, h)
338 #define EXCEPTION_PROLOG(area, label, h, extra, vec) \
339 SET_SCRATCH0(r13); /* save r13 */ \
340 EXCEPTION_PROLOG_0(area); \
341 EXCEPTION_PROLOG_1(area, extra, vec); \
342 EXCEPTION_PROLOG_2(label, h);
344 #define __KVMTEST(h, n) \
345 lbz r10,HSTATE_IN_GUEST(r13); \
349 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
351 * If hv is possible, interrupts come into to the hv version
352 * of the kvmppc_interrupt code, which then jumps to the PR handler,
353 * kvmppc_interrupt_pr, if the guest is a PR guest.
355 #define kvmppc_interrupt kvmppc_interrupt_hv
357 #define kvmppc_interrupt kvmppc_interrupt_pr
361 * Branch to label using its 0xC000 address. This results in instruction
362 * address suitable for MSR[IR]=0 or 1, which allows relocation to be turned
363 * on using mtmsr rather than rfid.
365 * This could set the 0xc bits for !RELOCATABLE as an immediate, rather than
366 * load KBASE for a slight optimisation.
368 #define BRANCH_TO_C000(reg, label) \
369 __LOAD_HANDLER(reg, label); \
373 #ifdef CONFIG_RELOCATABLE
374 #define BRANCH_TO_COMMON(reg, label) \
375 __LOAD_HANDLER(reg, label); \
379 #define BRANCH_LINK_TO_FAR(label) \
380 __LOAD_FAR_HANDLER(r12, label); \
385 * KVM requires __LOAD_FAR_HANDLER.
387 * __BRANCH_TO_KVM_EXIT branches are also a special case because they
388 * explicitly use r9 then reload it from PACA before branching. Hence
389 * the double-underscore.
391 #define __BRANCH_TO_KVM_EXIT(area, label) \
393 std r9,HSTATE_SCRATCH1(r13); \
394 __LOAD_FAR_HANDLER(r9, label); \
396 ld r9,area+EX_R9(r13); \
400 #define BRANCH_TO_COMMON(reg, label) \
403 #define BRANCH_LINK_TO_FAR(label) \
406 #define __BRANCH_TO_KVM_EXIT(area, label) \
407 ld r9,area+EX_R9(r13); \
412 /* Do not enable RI */
413 #define EXCEPTION_PROLOG_NORI(area, label, h, extra, vec) \
414 EXCEPTION_PROLOG_0(area); \
415 EXCEPTION_PROLOG_1(area, extra, vec); \
416 EXCEPTION_PROLOG_2_NORI(label, h);
419 #define __KVM_HANDLER(area, h, n) \
420 BEGIN_FTR_SECTION_NESTED(947) \
421 ld r10,area+EX_CFAR(r13); \
422 std r10,HSTATE_CFAR(r13); \
423 END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \
424 BEGIN_FTR_SECTION_NESTED(948) \
425 ld r10,area+EX_PPR(r13); \
426 std r10,HSTATE_PPR(r13); \
427 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \
428 ld r10,area+EX_R10(r13); \
429 std r12,HSTATE_SCRATCH0(r13); \
432 /* This reloads r9 before branching to kvmppc_interrupt */ \
433 __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt)
435 #define __KVM_HANDLER_SKIP(area, h, n) \
436 cmpwi r10,KVM_GUEST_MODE_SKIP; \
438 BEGIN_FTR_SECTION_NESTED(948) \
439 ld r10,area+EX_PPR(r13); \
440 std r10,HSTATE_PPR(r13); \
441 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \
442 ld r10,area+EX_R10(r13); \
443 std r12,HSTATE_SCRATCH0(r13); \
446 /* This reloads r9 before branching to kvmppc_interrupt */ \
447 __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt); \
448 89: mtocrf 0x80,r9; \
449 ld r9,area+EX_R9(r13); \
450 ld r10,area+EX_R10(r13); \
451 b kvmppc_skip_##h##interrupt
453 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
454 #define KVMTEST(h, n) __KVMTEST(h, n)
455 #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n)
456 #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
459 #define KVMTEST(h, n)
460 #define KVM_HANDLER(area, h, n)
461 #define KVM_HANDLER_SKIP(area, h, n)
466 #define EXCEPTION_PROLOG_COMMON_1() \
467 std r9,_CCR(r1); /* save CR in stackframe */ \
468 std r11,_NIP(r1); /* save SRR0 in stackframe */ \
469 std r12,_MSR(r1); /* save SRR1 in stackframe */ \
470 std r10,0(r1); /* make stack chain pointer */ \
471 std r0,GPR0(r1); /* save r0 in stackframe */ \
472 std r10,GPR1(r1); /* save r1 in stackframe */ \
476 * The common exception prolog is used for all except a few exceptions
477 * such as a segment miss on a kernel address. We have to be prepared
478 * to take another exception from the point where we first touch the
479 * kernel stack onwards.
481 * On entry r13 points to the paca, r9-r13 are saved in the paca,
482 * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
483 * SRR1, and relocation is on.
485 #define EXCEPTION_PROLOG_COMMON(n, area) \
486 andi. r10,r12,MSR_PR; /* See if coming from user */ \
487 mr r10,r1; /* Save r1 */ \
488 subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \
490 ld r1,PACAKSAVE(r13); /* kernel stack to use */ \
491 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \
492 blt+ cr1,3f; /* abort if it is */ \
493 li r1,(n); /* will be reloaded later */ \
494 sth r1,PACA_TRAP_SAVE(r13); \
495 std r3,area+EX_R3(r13); \
496 addi r3,r13,area; /* r3 -> where regs are saved*/ \
497 RESTORE_CTR(r1, area); \
499 3: EXCEPTION_PROLOG_COMMON_1(); \
500 kuap_save_amr_and_lock r9, r10, cr1, cr0; \
501 beq 4f; /* if from kernel mode */ \
502 ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \
503 SAVE_PPR(area, r9); \
504 4: EXCEPTION_PROLOG_COMMON_2(area) \
505 EXCEPTION_PROLOG_COMMON_3(n) \
508 /* Save original regs values from save area to stack frame. */
509 #define EXCEPTION_PROLOG_COMMON_2(area) \
510 ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \
511 ld r10,area+EX_R10(r13); \
514 ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \
515 ld r10,area+EX_R12(r13); \
516 ld r11,area+EX_R13(r13); \
520 BEGIN_FTR_SECTION_NESTED(66); \
521 ld r10,area+EX_CFAR(r13); \
522 std r10,ORIG_GPR3(r1); \
523 END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
524 GET_CTR(r10, area); \
527 #define EXCEPTION_PROLOG_COMMON_3(n) \
528 std r2,GPR2(r1); /* save r2 in stackframe */ \
529 SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
530 SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
531 mflr r9; /* Get LR, later save to stack */ \
532 ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
534 lbz r10,PACAIRQSOFTMASK(r13); \
535 mfspr r11,SPRN_XER; /* save XER in stackframe */ \
539 std r9,_TRAP(r1); /* set trap number */ \
541 ld r11,exception_marker@toc(r2); \
542 std r10,RESULT(r1); /* clear regs->result */ \
543 std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */
548 #define STD_EXCEPTION(vec, label) \
549 EXCEPTION_PROLOG(PACA_EXGEN, label, EXC_STD, KVMTEST_PR, vec);
551 /* Version of above for when we have to branch out-of-line */
552 #define __OOL_EXCEPTION(vec, label, hdlr) \
554 EXCEPTION_PROLOG_0(PACA_EXGEN) \
557 #define STD_EXCEPTION_OOL(vec, label) \
558 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \
559 EXCEPTION_PROLOG_2(label, EXC_STD)
561 #define STD_EXCEPTION_HV(loc, vec, label) \
562 EXCEPTION_PROLOG(PACA_EXGEN, label, EXC_HV, KVMTEST_HV, vec);
564 #define STD_EXCEPTION_HV_OOL(vec, label) \
565 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \
566 EXCEPTION_PROLOG_2(label, EXC_HV)
568 #define STD_RELON_EXCEPTION(loc, vec, label) \
569 /* No guest interrupts come through here */ \
570 EXCEPTION_RELON_PROLOG(PACA_EXGEN, label, EXC_STD, NOTEST, vec);
572 #define STD_RELON_EXCEPTION_OOL(vec, label) \
573 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \
574 EXCEPTION_PROLOG_2_RELON(label, EXC_STD)
576 #define STD_RELON_EXCEPTION_HV(loc, vec, label) \
577 EXCEPTION_RELON_PROLOG(PACA_EXGEN, label, EXC_HV, KVMTEST_HV, vec);
579 #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \
580 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \
581 EXCEPTION_PROLOG_2_RELON(label, EXC_HV)
583 /* This associate vector numbers with bits in paca->irq_happened */
584 #define SOFTEN_VALUE_0x500 PACA_IRQ_EE
585 #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC
586 #define SOFTEN_VALUE_0x980 PACA_IRQ_DEC
587 #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL
588 #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL
589 #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI
590 #define SOFTEN_VALUE_0xea0 PACA_IRQ_EE
591 #define SOFTEN_VALUE_0xf00 PACA_IRQ_PMI
593 #define __SOFTEN_TEST(h, vec, bitmask) \
594 lbz r10,PACAIRQSOFTMASK(r13); \
595 andi. r10,r10,bitmask; \
596 li r10,SOFTEN_VALUE_##vec; \
597 bne masked_##h##interrupt
599 #define _SOFTEN_TEST(h, vec, bitmask) __SOFTEN_TEST(h, vec, bitmask)
601 #define SOFTEN_TEST_PR(vec, bitmask) \
602 KVMTEST(EXC_STD, vec); \
603 _SOFTEN_TEST(EXC_STD, vec, bitmask)
605 #define SOFTEN_TEST_HV(vec, bitmask) \
606 KVMTEST(EXC_HV, vec); \
607 _SOFTEN_TEST(EXC_HV, vec, bitmask)
609 #define KVMTEST_PR(vec) \
610 KVMTEST(EXC_STD, vec)
612 #define KVMTEST_HV(vec) \
615 #define SOFTEN_NOTEST_PR(vec, bitmask) _SOFTEN_TEST(EXC_STD, vec, bitmask)
616 #define SOFTEN_NOTEST_HV(vec, bitmask) _SOFTEN_TEST(EXC_HV, vec, bitmask)
618 #define __MASKABLE_EXCEPTION(vec, label, h, extra, bitmask) \
619 SET_SCRATCH0(r13); /* save r13 */ \
620 EXCEPTION_PROLOG_0(PACA_EXGEN); \
621 MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec, bitmask); \
622 EXCEPTION_PROLOG_2(label, h);
624 #define MASKABLE_EXCEPTION(vec, label, bitmask) \
625 __MASKABLE_EXCEPTION(vec, label, EXC_STD, SOFTEN_TEST_PR, bitmask)
627 #define MASKABLE_EXCEPTION_OOL(vec, label, bitmask) \
628 MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec, bitmask);\
629 EXCEPTION_PROLOG_2(label, EXC_STD)
631 #define MASKABLE_EXCEPTION_HV(vec, label, bitmask) \
632 __MASKABLE_EXCEPTION(vec, label, EXC_HV, SOFTEN_TEST_HV, bitmask)
634 #define MASKABLE_EXCEPTION_HV_OOL(vec, label, bitmask) \
635 MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec, bitmask);\
636 EXCEPTION_PROLOG_2(label, EXC_HV)
638 #define __MASKABLE_RELON_EXCEPTION(vec, label, h, extra, bitmask) \
639 SET_SCRATCH0(r13); /* save r13 */ \
640 EXCEPTION_PROLOG_0(PACA_EXGEN); \
641 MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec, bitmask); \
642 EXCEPTION_PROLOG_2_RELON(label, h)
644 #define MASKABLE_RELON_EXCEPTION(vec, label, bitmask) \
645 __MASKABLE_RELON_EXCEPTION(vec, label, EXC_STD, SOFTEN_NOTEST_PR, bitmask)
647 #define MASKABLE_RELON_EXCEPTION_OOL(vec, label, bitmask) \
648 MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_PR, vec, bitmask);\
649 EXCEPTION_PROLOG_2(label, EXC_STD);
651 #define MASKABLE_RELON_EXCEPTION_HV(vec, label, bitmask) \
652 __MASKABLE_RELON_EXCEPTION(vec, label, EXC_HV, SOFTEN_TEST_HV, bitmask)
654 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label, bitmask) \
655 MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec, bitmask);\
656 EXCEPTION_PROLOG_2_RELON(label, EXC_HV)
659 * Our exception common code can be passed various "additions"
660 * to specify the behaviour of interrupts, whether to kick the
665 * This addition reconciles our actual IRQ state with the various software
666 * flags that track it. This may call C code.
668 #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11)
673 #define RUNLATCH_ON \
675 ld r3, PACA_THREAD_INFO(r13); \
676 ld r4,TI_LOCAL_FLAGS(r3); \
677 andi. r0,r4,_TLF_RUNLATCH; \
678 beql ppc64_runlatch_on_trampoline; \
679 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
681 #define EXCEPTION_COMMON(area, trap, label, hdlr, ret, additions) \
682 EXCEPTION_PROLOG_COMMON(trap, area); \
683 /* Volatile regs are potentially clobbered here */ \
685 addi r3,r1,STACK_FRAME_OVERHEAD; \
690 * Exception where stack is already set in r1, r1 is saved in r10, and it
691 * continues rather than returns.
693 #define EXCEPTION_COMMON_NORET_STACK(area, trap, label, hdlr, additions) \
694 EXCEPTION_PROLOG_COMMON_1(); \
695 kuap_save_amr_and_lock r9, r10, cr1; \
696 EXCEPTION_PROLOG_COMMON_2(area); \
697 EXCEPTION_PROLOG_COMMON_3(trap); \
698 /* Volatile regs are potentially clobbered here */ \
700 addi r3,r1,STACK_FRAME_OVERHEAD; \
703 #define STD_EXCEPTION_COMMON(trap, label, hdlr) \
704 EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr, \
705 ret_from_except, ADD_NVGPRS;ADD_RECONCILE)
708 * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
709 * in the idle task and therefore need the special idle handling
710 * (finish nap and runlatch)
712 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \
713 EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr, \
714 ret_from_except_lite, FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
717 * When the idle code in power4_idle puts the CPU into NAP mode,
718 * it has to do so in a loop, and relies on the external interrupt
719 * and decrementer interrupt entry code to get it out of the loop.
720 * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
721 * to signal that it is in the loop and needs help to get out.
723 #ifdef CONFIG_PPC_970_NAP
726 ld r11, PACA_THREAD_INFO(r13); \
727 ld r9,TI_LOCAL_FLAGS(r11); \
728 andi. r10,r9,_TLF_NAPPING; \
729 bnel power4_fixup_nap; \
730 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
735 #endif /* _ASM_POWERPC_EXCEPTION_H */