18aa34ab8SBenjamin Herrenschmidt #ifndef _ASM_POWERPC_EXCEPTION_H 28aa34ab8SBenjamin Herrenschmidt #define _ASM_POWERPC_EXCEPTION_H 38aa34ab8SBenjamin Herrenschmidt /* 48aa34ab8SBenjamin Herrenschmidt * Extracted from head_64.S 58aa34ab8SBenjamin Herrenschmidt * 68aa34ab8SBenjamin Herrenschmidt * PowerPC version 78aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) 88aa34ab8SBenjamin Herrenschmidt * 98aa34ab8SBenjamin Herrenschmidt * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP 108aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu> 118aa34ab8SBenjamin Herrenschmidt * Adapted for Power Macintosh by Paul Mackerras. 128aa34ab8SBenjamin Herrenschmidt * Low-level exception handlers and MMU support 138aa34ab8SBenjamin Herrenschmidt * rewritten by Paul Mackerras. 148aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1996 Paul Mackerras. 158aa34ab8SBenjamin Herrenschmidt * 168aa34ab8SBenjamin Herrenschmidt * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and 178aa34ab8SBenjamin Herrenschmidt * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com 188aa34ab8SBenjamin Herrenschmidt * 198aa34ab8SBenjamin Herrenschmidt * This file contains the low-level support and setup for the 208aa34ab8SBenjamin Herrenschmidt * PowerPC-64 platform, including trap and interrupt dispatch. 218aa34ab8SBenjamin Herrenschmidt * 228aa34ab8SBenjamin Herrenschmidt * This program is free software; you can redistribute it and/or 238aa34ab8SBenjamin Herrenschmidt * modify it under the terms of the GNU General Public License 248aa34ab8SBenjamin Herrenschmidt * as published by the Free Software Foundation; either version 258aa34ab8SBenjamin Herrenschmidt * 2 of the License, or (at your option) any later version. 268aa34ab8SBenjamin Herrenschmidt */ 278aa34ab8SBenjamin Herrenschmidt /* 288aa34ab8SBenjamin Herrenschmidt * The following macros define the code that appears as 298aa34ab8SBenjamin Herrenschmidt * the prologue to each of the exception handlers. They 308aa34ab8SBenjamin Herrenschmidt * are split into two parts to allow a single kernel binary 318aa34ab8SBenjamin Herrenschmidt * to be used for pSeries and iSeries. 328aa34ab8SBenjamin Herrenschmidt * 338aa34ab8SBenjamin Herrenschmidt * We make as much of the exception code common between native 348aa34ab8SBenjamin Herrenschmidt * exception handlers (including pSeries LPAR) and iSeries LPAR 358aa34ab8SBenjamin Herrenschmidt * implementations as possible. 368aa34ab8SBenjamin Herrenschmidt */ 37da2bc464SMichael Ellerman #include <asm/head-64.h> 388aa34ab8SBenjamin Herrenschmidt 398aa34ab8SBenjamin Herrenschmidt #define EX_R9 0 408aa34ab8SBenjamin Herrenschmidt #define EX_R10 8 418aa34ab8SBenjamin Herrenschmidt #define EX_R11 16 428aa34ab8SBenjamin Herrenschmidt #define EX_R12 24 438aa34ab8SBenjamin Herrenschmidt #define EX_R13 32 448aa34ab8SBenjamin Herrenschmidt #define EX_SRR0 40 458aa34ab8SBenjamin Herrenschmidt #define EX_DAR 48 468aa34ab8SBenjamin Herrenschmidt #define EX_DSISR 56 478aa34ab8SBenjamin Herrenschmidt #define EX_CCR 60 488aa34ab8SBenjamin Herrenschmidt #define EX_R3 64 498aa34ab8SBenjamin Herrenschmidt #define EX_LR 72 5048404f2eSPaul Mackerras #define EX_CFAR 80 51a09688cdSHaren Myneni #define EX_PPR 88 /* SMT thread status register (priority) */ 52bc2e6c6aSMichael Neuling #define EX_CTR 96 538aa34ab8SBenjamin Herrenschmidt 544700dfafSMichael Neuling #ifdef CONFIG_RELOCATABLE 551707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 564700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 574700dfafSMichael Neuling LOAD_HANDLER(r12,label); \ 58bc2e6c6aSMichael Neuling mtctr r12; \ 594700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 604700dfafSMichael Neuling li r10,MSR_RI; \ 614700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 62bc2e6c6aSMichael Neuling bctr; 634700dfafSMichael Neuling #else 644700dfafSMichael Neuling /* If not relocatable, we can jump directly -- and save messing with LR */ 651707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 664700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 674700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 684700dfafSMichael Neuling li r10,MSR_RI; \ 694700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 704700dfafSMichael Neuling b label; 714700dfafSMichael Neuling #endif 721707dd16SPaul Mackerras #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 731707dd16SPaul Mackerras __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 744700dfafSMichael Neuling 754700dfafSMichael Neuling /* 764700dfafSMichael Neuling * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on 774700dfafSMichael Neuling * so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which 784700dfafSMichael Neuling * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr. 794700dfafSMichael Neuling */ 804700dfafSMichael Neuling #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \ 811707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 824700dfafSMichael Neuling EXCEPTION_PROLOG_1(area, extra, vec); \ 834700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 844700dfafSMichael Neuling 858aa34ab8SBenjamin Herrenschmidt /* 868aa34ab8SBenjamin Herrenschmidt * We're short on space and time in the exception prolog, so we can't 8727510235SMichael Ellerman * use the normal LOAD_REG_IMMEDIATE macro to load the address of label. 8827510235SMichael Ellerman * Instead we get the base of the kernel from paca->kernelbase and or in the low 8927510235SMichael Ellerman * part of label. This requires that the label be within 64KB of kernelbase, and 9027510235SMichael Ellerman * that kernelbase be 64K aligned. 918aa34ab8SBenjamin Herrenschmidt */ 928aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 93d8d42b05SMichael Ellerman ld reg,PACAKBASE(r13); /* get high part of &label */ \ 94e6740ae6SHugh Dickins ori reg,reg,FIXED_SYMBOL_ABS_ADDR(label); 958aa34ab8SBenjamin Herrenschmidt 96fb479e44SNicholas Piggin #define __LOAD_HANDLER(reg, label) \ 97fb479e44SNicholas Piggin ld reg,PACAKBASE(r13); \ 98fb479e44SNicholas Piggin ori reg,reg,(ABS_ADDR(label))@l; 99fb479e44SNicholas Piggin 100a97a65d5SNicholas Piggin /* 101a97a65d5SNicholas Piggin * Branches from unrelocated code (e.g., interrupts) to labels outside 102a97a65d5SNicholas Piggin * head-y require >64K offsets. 103a97a65d5SNicholas Piggin */ 104a97a65d5SNicholas Piggin #define __LOAD_FAR_HANDLER(reg, label) \ 105a97a65d5SNicholas Piggin ld reg,PACAKBASE(r13); \ 106a97a65d5SNicholas Piggin ori reg,reg,(ABS_ADDR(label))@l; \ 107a97a65d5SNicholas Piggin addis reg,reg,(ABS_ADDR(label))@h; 108a97a65d5SNicholas Piggin 109a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 110a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 111a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 112a5d4f3adSBenjamin Herrenschmidt 1134700dfafSMichael Neuling #if defined(CONFIG_RELOCATABLE) 1144700dfafSMichael Neuling /* 115bc2e6c6aSMichael Neuling * If we support interrupts with relocation on AND we're a relocatable kernel, 116bc2e6c6aSMichael Neuling * we need to use CTR to get to the 2nd level handler. So, save/restore it 117bc2e6c6aSMichael Neuling * when required. 1184700dfafSMichael Neuling */ 119bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13) 120bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13) 121bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg 1224700dfafSMichael Neuling #else 123bc2e6c6aSMichael Neuling /* ...else CTR is unused and in register. */ 124bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) 125bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) mfctr reg 126bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) 1274700dfafSMichael Neuling #endif 1284700dfafSMichael Neuling 12913e7a8e8SHaren Myneni /* 13013e7a8e8SHaren Myneni * PPR save/restore macros used in exceptions_64s.S 13113e7a8e8SHaren Myneni * Used for P7 or later processors 13213e7a8e8SHaren Myneni */ 13313e7a8e8SHaren Myneni #define SAVE_PPR(area, ra, rb) \ 13413e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(940) \ 13513e7a8e8SHaren Myneni ld ra,PACACURRENT(r13); \ 13613e7a8e8SHaren Myneni ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \ 13713e7a8e8SHaren Myneni std rb,TASKTHREADPPR(ra); \ 13813e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 13913e7a8e8SHaren Myneni 14013e7a8e8SHaren Myneni #define RESTORE_PPR_PACA(area, ra) \ 14113e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(941) \ 14213e7a8e8SHaren Myneni ld ra,area+EX_PPR(r13); \ 14313e7a8e8SHaren Myneni mtspr SPRN_PPR,ra; \ 14413e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 14513e7a8e8SHaren Myneni 14613e7a8e8SHaren Myneni /* 1471707dd16SPaul Mackerras * Get an SPR into a register if the CPU has the given feature 14813e7a8e8SHaren Myneni */ 1491707dd16SPaul Mackerras #define OPT_GET_SPR(ra, spr, ftr) \ 15013e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(943) \ 1511707dd16SPaul Mackerras mfspr ra,spr; \ 1521707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 15313e7a8e8SHaren Myneni 1541707dd16SPaul Mackerras /* 155d410ae21SMahesh Salgaonkar * Set an SPR from a register if the CPU has the given feature 156d410ae21SMahesh Salgaonkar */ 157d410ae21SMahesh Salgaonkar #define OPT_SET_SPR(ra, spr, ftr) \ 158d410ae21SMahesh Salgaonkar BEGIN_FTR_SECTION_NESTED(943) \ 159d410ae21SMahesh Salgaonkar mtspr spr,ra; \ 160d410ae21SMahesh Salgaonkar END_FTR_SECTION_NESTED(ftr,ftr,943) 161d410ae21SMahesh Salgaonkar 162d410ae21SMahesh Salgaonkar /* 1631707dd16SPaul Mackerras * Save a register to the PACA if the CPU has the given feature 1641707dd16SPaul Mackerras */ 1651707dd16SPaul Mackerras #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \ 1661707dd16SPaul Mackerras BEGIN_FTR_SECTION_NESTED(943) \ 1671707dd16SPaul Mackerras std ra,offset(r13); \ 1681707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 1691707dd16SPaul Mackerras 170f23ed166SNicholas Piggin #define EXCEPTION_PROLOG_0_PACA(area) \ 17144e9309fSHaren Myneni std r9,area+EX_R9(r13); /* save r9 */ \ 1721707dd16SPaul Mackerras OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 1731707dd16SPaul Mackerras HMT_MEDIUM; \ 17444e9309fSHaren Myneni std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 1751707dd16SPaul Mackerras OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 1761707dd16SPaul Mackerras 177f23ed166SNicholas Piggin #define EXCEPTION_PROLOG_0(area) \ 178f23ed166SNicholas Piggin GET_PACA(r13); \ 179f23ed166SNicholas Piggin EXCEPTION_PROLOG_0_PACA(area) 180f23ed166SNicholas Piggin 1811707dd16SPaul Mackerras #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 1821707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 1831707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 184bc2e6c6aSMichael Neuling SAVE_CTR(r10, area); \ 185b01c8b54SPaul Mackerras mfcr r9; \ 186b01c8b54SPaul Mackerras extra(vec); \ 187b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 188b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 189b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 190b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 191b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 192b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(area, extra, vec) 1938aa34ab8SBenjamin Herrenschmidt 194a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 1958aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 196a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1978aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 198a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 199a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 200a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 201a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 2028aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 203a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 204a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 2058aa34ab8SBenjamin Herrenschmidt 206b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 2071707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 208b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 209a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 210c5a8c0c9SBenjamin Herrenschmidt 211f23ed166SNicholas Piggin /* Have the PACA in r13 already */ 212f23ed166SNicholas Piggin #define EXCEPTION_PROLOG_PSERIES_PACA(area, label, h, extra, vec) \ 213f23ed166SNicholas Piggin EXCEPTION_PROLOG_0_PACA(area); \ 214f23ed166SNicholas Piggin EXCEPTION_PROLOG_1(area, extra, vec); \ 215f23ed166SNicholas Piggin EXCEPTION_PROLOG_PSERIES_1(label, h); 216f23ed166SNicholas Piggin 217da2bc464SMichael Ellerman #define __KVMTEST(h, n) \ 2183c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 219b01c8b54SPaul Mackerras cmpwi r10,0; \ 220da2bc464SMichael Ellerman bne do_kvm_##h##n 221b01c8b54SPaul Mackerras 222dd96b2c2SAneesh Kumar K.V #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 223dd96b2c2SAneesh Kumar K.V /* 224dd96b2c2SAneesh Kumar K.V * If hv is possible, interrupts come into to the hv version 225dd96b2c2SAneesh Kumar K.V * of the kvmppc_interrupt code, which then jumps to the PR handler, 226dd96b2c2SAneesh Kumar K.V * kvmppc_interrupt_pr, if the guest is a PR guest. 227dd96b2c2SAneesh Kumar K.V */ 228dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_hv 229dd96b2c2SAneesh Kumar K.V #else 230dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_pr 231dd96b2c2SAneesh Kumar K.V #endif 232dd96b2c2SAneesh Kumar K.V 233fb479e44SNicholas Piggin #ifdef CONFIG_RELOCATABLE 234fb479e44SNicholas Piggin #define BRANCH_TO_COMMON(reg, label) \ 235fb479e44SNicholas Piggin __LOAD_HANDLER(reg, label); \ 236fb479e44SNicholas Piggin mtctr reg; \ 237fb479e44SNicholas Piggin bctr 238fb479e44SNicholas Piggin 2392337d207SNicholas Piggin #define BRANCH_LINK_TO_FAR(reg, label) \ 2402337d207SNicholas Piggin __LOAD_FAR_HANDLER(reg, label); \ 2412337d207SNicholas Piggin mtctr reg; \ 2422337d207SNicholas Piggin bctrl 2432337d207SNicholas Piggin 244a97a65d5SNicholas Piggin /* 245a97a65d5SNicholas Piggin * KVM requires __LOAD_FAR_HANDLER. 246a97a65d5SNicholas Piggin * 247a97a65d5SNicholas Piggin * __BRANCH_TO_KVM_EXIT branches are also a special case because they 248a97a65d5SNicholas Piggin * explicitly use r9 then reload it from PACA before branching. Hence 249a97a65d5SNicholas Piggin * the double-underscore. 250a97a65d5SNicholas Piggin */ 251a97a65d5SNicholas Piggin #define __BRANCH_TO_KVM_EXIT(area, label) \ 252a97a65d5SNicholas Piggin mfctr r9; \ 253a97a65d5SNicholas Piggin std r9,HSTATE_SCRATCH1(r13); \ 254a97a65d5SNicholas Piggin __LOAD_FAR_HANDLER(r9, label); \ 255a97a65d5SNicholas Piggin mtctr r9; \ 256a97a65d5SNicholas Piggin ld r9,area+EX_R9(r13); \ 257a97a65d5SNicholas Piggin bctr 258a97a65d5SNicholas Piggin 259a97a65d5SNicholas Piggin #define BRANCH_TO_KVM(reg, label) \ 260a97a65d5SNicholas Piggin __LOAD_FAR_HANDLER(reg, label); \ 261a97a65d5SNicholas Piggin mtctr reg; \ 262a97a65d5SNicholas Piggin bctr 263a97a65d5SNicholas Piggin 264fb479e44SNicholas Piggin #else 265fb479e44SNicholas Piggin #define BRANCH_TO_COMMON(reg, label) \ 266fb479e44SNicholas Piggin b label 267fb479e44SNicholas Piggin 2682337d207SNicholas Piggin #define BRANCH_LINK_TO_FAR(reg, label) \ 2692337d207SNicholas Piggin bl label 2702337d207SNicholas Piggin 271a97a65d5SNicholas Piggin #define BRANCH_TO_KVM(reg, label) \ 272a97a65d5SNicholas Piggin b label 273a97a65d5SNicholas Piggin 274a97a65d5SNicholas Piggin #define __BRANCH_TO_KVM_EXIT(area, label) \ 275a97a65d5SNicholas Piggin ld r9,area+EX_R9(r13); \ 276a97a65d5SNicholas Piggin b label 277a97a65d5SNicholas Piggin 278fb479e44SNicholas Piggin #endif 279fb479e44SNicholas Piggin 280a97a65d5SNicholas Piggin 281d3918e7fSNicholas Piggin #define __KVM_HANDLER(area, h, n) \ 2820acb9111SPaul Mackerras BEGIN_FTR_SECTION_NESTED(947) \ 2830acb9111SPaul Mackerras ld r10,area+EX_CFAR(r13); \ 2840acb9111SPaul Mackerras std r10,HSTATE_CFAR(r13); \ 2850acb9111SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 2864b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 2874b8473c9SPaul Mackerras ld r10,area+EX_PPR(r13); \ 2884b8473c9SPaul Mackerras std r10,HSTATE_PPR(r13); \ 2894b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 290b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 2913c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 292d3918e7fSNicholas Piggin sldi r12,r9,32; \ 293d3918e7fSNicholas Piggin ori r12,r12,(n); \ 294a97a65d5SNicholas Piggin /* This reloads r9 before branching to kvmppc_interrupt */ \ 295a97a65d5SNicholas Piggin __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt) 296b01c8b54SPaul Mackerras 297b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 298b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 299b01c8b54SPaul Mackerras beq 89f; \ 3004b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 301d3918e7fSNicholas Piggin ld r10,area+EX_PPR(r13); \ 302d3918e7fSNicholas Piggin std r10,HSTATE_PPR(r13); \ 3034b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 304d3918e7fSNicholas Piggin ld r10,area+EX_R10(r13); \ 3053c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 306d3918e7fSNicholas Piggin sldi r12,r9,32; \ 307d3918e7fSNicholas Piggin ori r12,r12,(n); \ 308a97a65d5SNicholas Piggin /* This reloads r9 before branching to kvmppc_interrupt */ \ 309a97a65d5SNicholas Piggin __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt); \ 310b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 311b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 312d3918e7fSNicholas Piggin ld r10,area+EX_R10(r13); \ 313b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 314b01c8b54SPaul Mackerras 315b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 316da2bc464SMichael Ellerman #define KVMTEST(h, n) __KVMTEST(h, n) 317b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 318b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 319b01c8b54SPaul Mackerras 320b01c8b54SPaul Mackerras #else 321da2bc464SMichael Ellerman #define KVMTEST(h, n) 322b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 323b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 324b01c8b54SPaul Mackerras #endif 325b01c8b54SPaul Mackerras 326b01c8b54SPaul Mackerras #define NOTEST(n) 327b01c8b54SPaul Mackerras 3288aa34ab8SBenjamin Herrenschmidt /* 3298aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 3308aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 3318aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 3328aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 3338aa34ab8SBenjamin Herrenschmidt * 3348aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 3358aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 3368aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 3378aa34ab8SBenjamin Herrenschmidt */ 3388aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 3398aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 3408aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 3418aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 3428aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 3438aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 34490ff5d68SMichael Neuling 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \ 3451977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 3461977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 3478aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 3481977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 3491977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 350bc2e6c6aSMichael Neuling RESTORE_CTR(r1, area); \ 3518aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 3528aa34ab8SBenjamin Herrenschmidt 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 3538aa34ab8SBenjamin Herrenschmidt std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 3548aa34ab8SBenjamin Herrenschmidt std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 3558aa34ab8SBenjamin Herrenschmidt std r10,0(r1); /* make stack chain pointer */ \ 3568aa34ab8SBenjamin Herrenschmidt std r0,GPR0(r1); /* save r0 in stackframe */ \ 3578aa34ab8SBenjamin Herrenschmidt std r10,GPR1(r1); /* save r1 in stackframe */ \ 3585d75b264SHaren Myneni beq 4f; /* if from kernel mode */ \ 359c223c903SChristophe Leroy ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \ 36044e9309fSHaren Myneni SAVE_PPR(area, r9, r10); \ 361b14a7253SMahesh Salgaonkar 4: EXCEPTION_PROLOG_COMMON_2(area) \ 362b14a7253SMahesh Salgaonkar EXCEPTION_PROLOG_COMMON_3(n) \ 363b14a7253SMahesh Salgaonkar ACCOUNT_STOLEN_TIME 364b14a7253SMahesh Salgaonkar 365b14a7253SMahesh Salgaonkar /* Save original regs values from save area to stack frame. */ 366b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_2(area) \ 3678aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 3688aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 3698aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 3708aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 3718aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 3728aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 3738aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 3748aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 3758aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 3768aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 37748404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 37848404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 37948404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 38048404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 381b14a7253SMahesh Salgaonkar GET_CTR(r10, area); \ 382b14a7253SMahesh Salgaonkar std r10,_CTR(r1); 383b14a7253SMahesh Salgaonkar 384b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_3(n) \ 385b14a7253SMahesh Salgaonkar std r2,GPR2(r1); /* save r2 in stackframe */ \ 386b14a7253SMahesh Salgaonkar SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 387b14a7253SMahesh Salgaonkar SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 388bc2e6c6aSMichael Neuling mflr r9; /* Get LR, later save to stack */ \ 3898aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 3908aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 3918aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3928aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 3938aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 3948aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 3958aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 3968aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 3978aa34ab8SBenjamin Herrenschmidt li r10,0; \ 3988aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 3998aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 400b14a7253SMahesh Salgaonkar std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ 4018aa34ab8SBenjamin Herrenschmidt 4028aa34ab8SBenjamin Herrenschmidt /* 4038aa34ab8SBenjamin Herrenschmidt * Exception vectors. 4048aa34ab8SBenjamin Herrenschmidt */ 4052613265cSMichael Ellerman #define STD_EXCEPTION_PSERIES(vec, label) \ 406673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 407da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 408da2bc464SMichael Ellerman EXC_STD, KVMTEST_PR, vec); \ 4098aa34ab8SBenjamin Herrenschmidt 4101707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 411da2bc464SMichael Ellerman #define __OOL_EXCEPTION(vec, label, hdlr) \ 412da2bc464SMichael Ellerman SET_SCRATCH0(r13) \ 413da2bc464SMichael Ellerman EXCEPTION_PROLOG_0(PACA_EXGEN) \ 414da2bc464SMichael Ellerman b hdlr; 415da2bc464SMichael Ellerman 4161707dd16SPaul Mackerras #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 417da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 418da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 4191707dd16SPaul Mackerras 420b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 421673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 422da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 423da2bc464SMichael Ellerman EXC_HV, KVMTEST_HV, vec); 4248aa34ab8SBenjamin Herrenschmidt 4251707dd16SPaul Mackerras #define STD_EXCEPTION_HV_OOL(vec, label) \ 426da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 427da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 4281707dd16SPaul Mackerras 4294700dfafSMichael Neuling #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 4304700dfafSMichael Neuling /* No guest interrupts come through here */ \ 4314700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 432da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec); 4334700dfafSMichael Neuling 4341707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 435c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 436da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD) 4371707dd16SPaul Mackerras 4384700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 4394700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 440bc355125SPaul Mackerras EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, \ 441bc355125SPaul Mackerras EXC_HV, KVMTEST_HV, vec); 4424700dfafSMichael Neuling 4431707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 444bc355125SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 445da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV) 4461707dd16SPaul Mackerras 4477230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 4487230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 4497230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 450da2bc464SMichael Ellerman #define SOFTEN_VALUE_0x980 PACA_IRQ_DEC 4511dbdafecSIan Munsie #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 452655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 4530869b6fdSMahesh Salgaonkar #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI 4549baaef0aSBenjamin Herrenschmidt #define SOFTEN_VALUE_0xea0 PACA_IRQ_EE 4557230c564SBenjamin Herrenschmidt 4567230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 4578aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 4588aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 4597230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 460b01c8b54SPaul Mackerras beq masked_##h##interrupt 461da2bc464SMichael Ellerman 4627230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 463b01c8b54SPaul Mackerras 464de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 465da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec); \ 4667230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 467b01c8b54SPaul Mackerras 468b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 469da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec); \ 4707230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 471b01c8b54SPaul Mackerras 472da2bc464SMichael Ellerman #define KVMTEST_PR(vec) \ 473da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec) 474da2bc464SMichael Ellerman 475da2bc464SMichael Ellerman #define KVMTEST_HV(vec) \ 476da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec) 477da2bc464SMichael Ellerman 4784700dfafSMichael Neuling #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 4794700dfafSMichael Neuling #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 4804700dfafSMichael Neuling 481b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 482b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 4831707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 484b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 485da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, h); 4861707dd16SPaul Mackerras 487b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 488b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 489b3e6b5dfSBenjamin Herrenschmidt 490b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 491b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 492de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 493b3e6b5dfSBenjamin Herrenschmidt 494da2bc464SMichael Ellerman #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label) \ 495da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec); \ 496da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 497da2bc464SMichael Ellerman 498b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 499b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 500b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 5018aa34ab8SBenjamin Herrenschmidt 5021707dd16SPaul Mackerras #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 5031707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 504da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 5051707dd16SPaul Mackerras 5064700dfafSMichael Neuling #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 5074700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 5081707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 5094700dfafSMichael Neuling __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 510da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 511da2bc464SMichael Ellerman 5124700dfafSMichael Neuling #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 5134700dfafSMichael Neuling __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 5144700dfafSMichael Neuling 5154700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 5164700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 5174700dfafSMichael Neuling EXC_STD, SOFTEN_NOTEST_PR) 5184700dfafSMichael Neuling 5194700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 5204700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 521bc355125SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 5224700dfafSMichael Neuling 5231707dd16SPaul Mackerras #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 524bc355125SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 525a050d20dSNicholas Piggin EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV) 5261707dd16SPaul Mackerras 5271b701179SBenjamin Herrenschmidt /* 5281b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 5291b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 5301b701179SBenjamin Herrenschmidt * runlatch, etc... 5311b701179SBenjamin Herrenschmidt */ 5321b701179SBenjamin Herrenschmidt 5339daf112bSMichael Ellerman /* 5349daf112bSMichael Ellerman * This addition reconciles our actual IRQ state with the various software 5359daf112bSMichael Ellerman * flags that track it. This may call C code. 5369daf112bSMichael Ellerman */ 5379daf112bSMichael Ellerman #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11) 5388aa34ab8SBenjamin Herrenschmidt 539fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 540b1576fecSAnton Blanchard bl save_nvgprs 541fe1952fcSBenjamin Herrenschmidt 542fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 543fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 5449778b696SStuart Yoder CURRENT_THREAD_INFO(r3, r1); \ 545fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 546fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 547fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 548fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 549fe1952fcSBenjamin Herrenschmidt 550fe1952fcSBenjamin Herrenschmidt #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 5518aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 552a1d711c5SMichael Ellerman /* Volatile regs are potentially clobbered here */ \ 553fe1952fcSBenjamin Herrenschmidt additions; \ 5548aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 5558aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 556fe1952fcSBenjamin Herrenschmidt b ret 557fe1952fcSBenjamin Herrenschmidt 558fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 559fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 5609daf112bSMichael Ellerman ADD_NVGPRS;ADD_RECONCILE) 5618aa34ab8SBenjamin Herrenschmidt 5628aa34ab8SBenjamin Herrenschmidt /* 5638aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 5647450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 5657450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 5668aa34ab8SBenjamin Herrenschmidt */ 5677450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 568fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 5699daf112bSMichael Ellerman FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON) 5708aa34ab8SBenjamin Herrenschmidt 5718aa34ab8SBenjamin Herrenschmidt /* 5728aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 5738aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 5748aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 5758aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 5768aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 5778aa34ab8SBenjamin Herrenschmidt */ 5788aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 5798aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 5808aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 5819778b696SStuart Yoder CURRENT_THREAD_INFO(r11, r1); \ 5828aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 5838aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 5848aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 5858aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 5868aa34ab8SBenjamin Herrenschmidt #else 5878aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 5888aa34ab8SBenjamin Herrenschmidt #endif 5898aa34ab8SBenjamin Herrenschmidt 5908aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 591