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 170544686caSNicholas Piggin #define EXCEPTION_PROLOG_0(area) \ 171544686caSNicholas Piggin GET_PACA(r13); \ 17244e9309fSHaren Myneni std r9,area+EX_R9(r13); /* save r9 */ \ 1731707dd16SPaul Mackerras OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 1741707dd16SPaul Mackerras HMT_MEDIUM; \ 17544e9309fSHaren Myneni std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 1761707dd16SPaul Mackerras OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 1771707dd16SPaul Mackerras 1781707dd16SPaul Mackerras #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 1791707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 1801707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 181bc2e6c6aSMichael Neuling SAVE_CTR(r10, area); \ 182b01c8b54SPaul Mackerras mfcr r9; \ 183b01c8b54SPaul Mackerras extra(vec); \ 184b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 185b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 186b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 187b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 188b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 189b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(area, extra, vec) 1908aa34ab8SBenjamin Herrenschmidt 191a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 1928aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 193a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1948aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 195a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 196a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 197a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 198a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 1998aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 200a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 201a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 2028aa34ab8SBenjamin Herrenschmidt 20383a980f7SNicholas Piggin /* _NORI variant keeps MSR_RI clear */ 20483a980f7SNicholas Piggin #define __EXCEPTION_PROLOG_PSERIES_1_NORI(label, h) \ 20583a980f7SNicholas Piggin ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 20683a980f7SNicholas Piggin xori r10,r10,MSR_RI; /* Clear MSR_RI */ \ 20783a980f7SNicholas Piggin mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 20883a980f7SNicholas Piggin LOAD_HANDLER(r12,label) \ 20983a980f7SNicholas Piggin mtspr SPRN_##h##SRR0,r12; \ 21083a980f7SNicholas Piggin mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 21183a980f7SNicholas Piggin mtspr SPRN_##h##SRR1,r10; \ 21283a980f7SNicholas Piggin h##rfid; \ 21383a980f7SNicholas Piggin b . /* prevent speculative execution */ 21483a980f7SNicholas Piggin 21583a980f7SNicholas Piggin #define EXCEPTION_PROLOG_PSERIES_1_NORI(label, h) \ 21683a980f7SNicholas Piggin __EXCEPTION_PROLOG_PSERIES_1_NORI(label, h) 21783a980f7SNicholas Piggin 218b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 2191707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 220b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 221a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 222c5a8c0c9SBenjamin Herrenschmidt 223da2bc464SMichael Ellerman #define __KVMTEST(h, n) \ 2243c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 225b01c8b54SPaul Mackerras cmpwi r10,0; \ 226da2bc464SMichael Ellerman bne do_kvm_##h##n 227b01c8b54SPaul Mackerras 228dd96b2c2SAneesh Kumar K.V #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 229dd96b2c2SAneesh Kumar K.V /* 230dd96b2c2SAneesh Kumar K.V * If hv is possible, interrupts come into to the hv version 231dd96b2c2SAneesh Kumar K.V * of the kvmppc_interrupt code, which then jumps to the PR handler, 232dd96b2c2SAneesh Kumar K.V * kvmppc_interrupt_pr, if the guest is a PR guest. 233dd96b2c2SAneesh Kumar K.V */ 234dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_hv 235dd96b2c2SAneesh Kumar K.V #else 236dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_pr 237dd96b2c2SAneesh Kumar K.V #endif 238dd96b2c2SAneesh Kumar K.V 239b51351e2SNicholas Piggin /* 240b51351e2SNicholas Piggin * Branch to label using its 0xC000 address. This results in instruction 241b51351e2SNicholas Piggin * address suitable for MSR[IR]=0 or 1, which allows relocation to be turned 242b51351e2SNicholas Piggin * on using mtmsr rather than rfid. 243b51351e2SNicholas Piggin * 244b51351e2SNicholas Piggin * This could set the 0xc bits for !RELOCATABLE as an immediate, rather than 245b51351e2SNicholas Piggin * load KBASE for a slight optimisation. 246b51351e2SNicholas Piggin */ 247b51351e2SNicholas Piggin #define BRANCH_TO_C000(reg, label) \ 248b51351e2SNicholas Piggin __LOAD_HANDLER(reg, label); \ 249b51351e2SNicholas Piggin mtctr reg; \ 250b51351e2SNicholas Piggin bctr 251b51351e2SNicholas Piggin 252fb479e44SNicholas Piggin #ifdef CONFIG_RELOCATABLE 253fb479e44SNicholas Piggin #define BRANCH_TO_COMMON(reg, label) \ 254fb479e44SNicholas Piggin __LOAD_HANDLER(reg, label); \ 255fb479e44SNicholas Piggin mtctr reg; \ 256fb479e44SNicholas Piggin bctr 257fb479e44SNicholas Piggin 258be5c5e84SMichael Ellerman #define BRANCH_LINK_TO_FAR(label) \ 259be5c5e84SMichael Ellerman __LOAD_FAR_HANDLER(r12, label); \ 260be5c5e84SMichael Ellerman mtctr r12; \ 2612337d207SNicholas Piggin bctrl 2622337d207SNicholas Piggin 263a97a65d5SNicholas Piggin /* 264a97a65d5SNicholas Piggin * KVM requires __LOAD_FAR_HANDLER. 265a97a65d5SNicholas Piggin * 266a97a65d5SNicholas Piggin * __BRANCH_TO_KVM_EXIT branches are also a special case because they 267a97a65d5SNicholas Piggin * explicitly use r9 then reload it from PACA before branching. Hence 268a97a65d5SNicholas Piggin * the double-underscore. 269a97a65d5SNicholas Piggin */ 270a97a65d5SNicholas Piggin #define __BRANCH_TO_KVM_EXIT(area, label) \ 271a97a65d5SNicholas Piggin mfctr r9; \ 272a97a65d5SNicholas Piggin std r9,HSTATE_SCRATCH1(r13); \ 273a97a65d5SNicholas Piggin __LOAD_FAR_HANDLER(r9, label); \ 274a97a65d5SNicholas Piggin mtctr r9; \ 275a97a65d5SNicholas Piggin ld r9,area+EX_R9(r13); \ 276a97a65d5SNicholas Piggin bctr 277a97a65d5SNicholas Piggin 278fb479e44SNicholas Piggin #else 279fb479e44SNicholas Piggin #define BRANCH_TO_COMMON(reg, label) \ 280fb479e44SNicholas Piggin b label 281fb479e44SNicholas Piggin 282be5c5e84SMichael Ellerman #define BRANCH_LINK_TO_FAR(label) \ 2832337d207SNicholas Piggin bl label 2842337d207SNicholas Piggin 285a97a65d5SNicholas Piggin #define __BRANCH_TO_KVM_EXIT(area, label) \ 286a97a65d5SNicholas Piggin ld r9,area+EX_R9(r13); \ 287a97a65d5SNicholas Piggin b label 288a97a65d5SNicholas Piggin 289fb479e44SNicholas Piggin #endif 290fb479e44SNicholas Piggin 291c4f3b52cSNicholas Piggin /* Do not enable RI */ 292c4f3b52cSNicholas Piggin #define EXCEPTION_PROLOG_PSERIES_NORI(area, label, h, extra, vec) \ 293c4f3b52cSNicholas Piggin EXCEPTION_PROLOG_0(area); \ 294c4f3b52cSNicholas Piggin EXCEPTION_PROLOG_1(area, extra, vec); \ 295c4f3b52cSNicholas Piggin EXCEPTION_PROLOG_PSERIES_1_NORI(label, h); 296c4f3b52cSNicholas Piggin 297a97a65d5SNicholas Piggin 298d3918e7fSNicholas Piggin #define __KVM_HANDLER(area, h, n) \ 2990acb9111SPaul Mackerras BEGIN_FTR_SECTION_NESTED(947) \ 3000acb9111SPaul Mackerras ld r10,area+EX_CFAR(r13); \ 3010acb9111SPaul Mackerras std r10,HSTATE_CFAR(r13); \ 3020acb9111SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 3034b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 3044b8473c9SPaul Mackerras ld r10,area+EX_PPR(r13); \ 3054b8473c9SPaul Mackerras std r10,HSTATE_PPR(r13); \ 3064b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 307b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 3083c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 309d3918e7fSNicholas Piggin sldi r12,r9,32; \ 310d3918e7fSNicholas Piggin ori r12,r12,(n); \ 311a97a65d5SNicholas Piggin /* This reloads r9 before branching to kvmppc_interrupt */ \ 312a97a65d5SNicholas Piggin __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt) 313b01c8b54SPaul Mackerras 314b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 315b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 316b01c8b54SPaul Mackerras beq 89f; \ 3174b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 318d3918e7fSNicholas Piggin ld r10,area+EX_PPR(r13); \ 319d3918e7fSNicholas Piggin std r10,HSTATE_PPR(r13); \ 3204b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 321d3918e7fSNicholas Piggin ld r10,area+EX_R10(r13); \ 3223c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 323d3918e7fSNicholas Piggin sldi r12,r9,32; \ 324d3918e7fSNicholas Piggin ori r12,r12,(n); \ 325a97a65d5SNicholas Piggin /* This reloads r9 before branching to kvmppc_interrupt */ \ 326a97a65d5SNicholas Piggin __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt); \ 327b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 328b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 329d3918e7fSNicholas Piggin ld r10,area+EX_R10(r13); \ 330b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 331b01c8b54SPaul Mackerras 332b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 333da2bc464SMichael Ellerman #define KVMTEST(h, n) __KVMTEST(h, n) 334b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 335b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 336b01c8b54SPaul Mackerras 337b01c8b54SPaul Mackerras #else 338da2bc464SMichael Ellerman #define KVMTEST(h, n) 339b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 340b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 341b01c8b54SPaul Mackerras #endif 342b01c8b54SPaul Mackerras 343b01c8b54SPaul Mackerras #define NOTEST(n) 344b01c8b54SPaul Mackerras 345a4087a4dSNicholas Piggin #define EXCEPTION_PROLOG_COMMON_1() \ 346a4087a4dSNicholas Piggin std r9,_CCR(r1); /* save CR in stackframe */ \ 347a4087a4dSNicholas Piggin std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 348a4087a4dSNicholas Piggin std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 349a4087a4dSNicholas Piggin std r10,0(r1); /* make stack chain pointer */ \ 350a4087a4dSNicholas Piggin std r0,GPR0(r1); /* save r0 in stackframe */ \ 351a4087a4dSNicholas Piggin std r10,GPR1(r1); /* save r1 in stackframe */ \ 352a4087a4dSNicholas Piggin 353a4087a4dSNicholas Piggin 3548aa34ab8SBenjamin Herrenschmidt /* 3558aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 3568aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 3578aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 3588aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 3598aa34ab8SBenjamin Herrenschmidt * 3608aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 3618aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 3628aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 3638aa34ab8SBenjamin Herrenschmidt */ 3648aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 3658aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 3668aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 3678aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 3688aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 3698aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 37090ff5d68SMichael Neuling 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \ 3711977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 3721977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 3738aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 3741977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 3751977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 376bc2e6c6aSMichael Neuling RESTORE_CTR(r1, area); \ 3778aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 378a4087a4dSNicholas Piggin 3: EXCEPTION_PROLOG_COMMON_1(); \ 3795d75b264SHaren Myneni beq 4f; /* if from kernel mode */ \ 380c223c903SChristophe Leroy ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \ 38144e9309fSHaren Myneni SAVE_PPR(area, r9, r10); \ 382b14a7253SMahesh Salgaonkar 4: EXCEPTION_PROLOG_COMMON_2(area) \ 383b14a7253SMahesh Salgaonkar EXCEPTION_PROLOG_COMMON_3(n) \ 384b14a7253SMahesh Salgaonkar ACCOUNT_STOLEN_TIME 385b14a7253SMahesh Salgaonkar 386b14a7253SMahesh Salgaonkar /* Save original regs values from save area to stack frame. */ 387b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_2(area) \ 3888aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 3898aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 3908aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 3918aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 3928aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 3938aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 3948aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 3958aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 3968aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 3978aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 39848404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 39948404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 40048404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 40148404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 402b14a7253SMahesh Salgaonkar GET_CTR(r10, area); \ 403b14a7253SMahesh Salgaonkar std r10,_CTR(r1); 404b14a7253SMahesh Salgaonkar 405b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_3(n) \ 406b14a7253SMahesh Salgaonkar std r2,GPR2(r1); /* save r2 in stackframe */ \ 407b14a7253SMahesh Salgaonkar SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 408b14a7253SMahesh Salgaonkar SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 409bc2e6c6aSMichael Neuling mflr r9; /* Get LR, later save to stack */ \ 4108aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 4118aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 4128aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 4138aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 4148aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 4158aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 4168aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 4178aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 4188aa34ab8SBenjamin Herrenschmidt li r10,0; \ 4198aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 4208aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 421b14a7253SMahesh Salgaonkar std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ 4228aa34ab8SBenjamin Herrenschmidt 4238aa34ab8SBenjamin Herrenschmidt /* 4248aa34ab8SBenjamin Herrenschmidt * Exception vectors. 4258aa34ab8SBenjamin Herrenschmidt */ 4262613265cSMichael Ellerman #define STD_EXCEPTION_PSERIES(vec, label) \ 427673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 428da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 429da2bc464SMichael Ellerman EXC_STD, KVMTEST_PR, vec); \ 4308aa34ab8SBenjamin Herrenschmidt 4311707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 432da2bc464SMichael Ellerman #define __OOL_EXCEPTION(vec, label, hdlr) \ 433da2bc464SMichael Ellerman SET_SCRATCH0(r13) \ 434da2bc464SMichael Ellerman EXCEPTION_PROLOG_0(PACA_EXGEN) \ 435da2bc464SMichael Ellerman b hdlr; 436da2bc464SMichael Ellerman 4371707dd16SPaul Mackerras #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 438da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 439da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 4401707dd16SPaul Mackerras 441b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 442673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 443da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 444da2bc464SMichael Ellerman EXC_HV, KVMTEST_HV, vec); 4458aa34ab8SBenjamin Herrenschmidt 4461707dd16SPaul Mackerras #define STD_EXCEPTION_HV_OOL(vec, label) \ 447da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 448da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 4491707dd16SPaul Mackerras 4504700dfafSMichael Neuling #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 4514700dfafSMichael Neuling /* No guest interrupts come through here */ \ 4524700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 453da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec); 4544700dfafSMichael Neuling 4551707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 456c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 457da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD) 4581707dd16SPaul Mackerras 4594700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 4604700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 461bc355125SPaul Mackerras EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, \ 462bc355125SPaul Mackerras EXC_HV, KVMTEST_HV, vec); 4634700dfafSMichael Neuling 4641707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 465bc355125SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 466da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV) 4671707dd16SPaul Mackerras 4687230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 4697230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 4707230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 471da2bc464SMichael Ellerman #define SOFTEN_VALUE_0x980 PACA_IRQ_DEC 4721dbdafecSIan Munsie #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 473655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 4740869b6fdSMahesh Salgaonkar #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI 4759baaef0aSBenjamin Herrenschmidt #define SOFTEN_VALUE_0xea0 PACA_IRQ_EE 4767230c564SBenjamin Herrenschmidt 4777230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 4788aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 4798aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 4807230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 481b01c8b54SPaul Mackerras beq masked_##h##interrupt 482da2bc464SMichael Ellerman 4837230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 484b01c8b54SPaul Mackerras 485de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 486da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec); \ 4877230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 488b01c8b54SPaul Mackerras 489b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 490da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec); \ 4917230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 492b01c8b54SPaul Mackerras 493da2bc464SMichael Ellerman #define KVMTEST_PR(vec) \ 494da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec) 495da2bc464SMichael Ellerman 496da2bc464SMichael Ellerman #define KVMTEST_HV(vec) \ 497da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec) 498da2bc464SMichael Ellerman 4994700dfafSMichael Neuling #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 5004700dfafSMichael Neuling #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 5014700dfafSMichael Neuling 502b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 503b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 5041707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 505b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 506da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, h); 5071707dd16SPaul Mackerras 508b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 509b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 510b3e6b5dfSBenjamin Herrenschmidt 511b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 512b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 513de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 514b3e6b5dfSBenjamin Herrenschmidt 515da2bc464SMichael Ellerman #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label) \ 516da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec); \ 517da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 518da2bc464SMichael Ellerman 519b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 520b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 521b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 5228aa34ab8SBenjamin Herrenschmidt 5231707dd16SPaul Mackerras #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 5241707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 525da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 5261707dd16SPaul Mackerras 5274700dfafSMichael Neuling #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 5284700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 5291707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 5304700dfafSMichael Neuling __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 531da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 532da2bc464SMichael Ellerman 5334700dfafSMichael Neuling #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 5344700dfafSMichael Neuling __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 5354700dfafSMichael Neuling 5364700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 5374700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 5384700dfafSMichael Neuling EXC_STD, SOFTEN_NOTEST_PR) 5394700dfafSMichael Neuling 5404700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 5414700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 542bc355125SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 5434700dfafSMichael Neuling 5441707dd16SPaul Mackerras #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 545bc355125SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 546a050d20dSNicholas Piggin EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV) 5471707dd16SPaul Mackerras 5481b701179SBenjamin Herrenschmidt /* 5491b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 5501b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 5511b701179SBenjamin Herrenschmidt * runlatch, etc... 5521b701179SBenjamin Herrenschmidt */ 5531b701179SBenjamin Herrenschmidt 5549daf112bSMichael Ellerman /* 5559daf112bSMichael Ellerman * This addition reconciles our actual IRQ state with the various software 5569daf112bSMichael Ellerman * flags that track it. This may call C code. 5579daf112bSMichael Ellerman */ 5589daf112bSMichael Ellerman #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11) 5598aa34ab8SBenjamin Herrenschmidt 560fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 561b1576fecSAnton Blanchard bl save_nvgprs 562fe1952fcSBenjamin Herrenschmidt 563fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 564fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 5659778b696SStuart Yoder CURRENT_THREAD_INFO(r3, r1); \ 566fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 567fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 568fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 569fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 570fe1952fcSBenjamin Herrenschmidt 571a3d96f70SNicholas Piggin #define EXCEPTION_COMMON(area, trap, label, hdlr, ret, additions) \ 572a3d96f70SNicholas Piggin EXCEPTION_PROLOG_COMMON(trap, area); \ 573a1d711c5SMichael Ellerman /* Volatile regs are potentially clobbered here */ \ 574fe1952fcSBenjamin Herrenschmidt additions; \ 5758aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 5768aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 577fe1952fcSBenjamin Herrenschmidt b ret 578fe1952fcSBenjamin Herrenschmidt 579b1ee8a3dSNicholas Piggin /* 580b1ee8a3dSNicholas Piggin * Exception where stack is already set in r1, r1 is saved in r10, and it 581b1ee8a3dSNicholas Piggin * continues rather than returns. 582b1ee8a3dSNicholas Piggin */ 583b1ee8a3dSNicholas Piggin #define EXCEPTION_COMMON_NORET_STACK(area, trap, label, hdlr, additions) \ 584b1ee8a3dSNicholas Piggin EXCEPTION_PROLOG_COMMON_1(); \ 585b1ee8a3dSNicholas Piggin EXCEPTION_PROLOG_COMMON_2(area); \ 586b1ee8a3dSNicholas Piggin EXCEPTION_PROLOG_COMMON_3(trap); \ 587b1ee8a3dSNicholas Piggin /* Volatile regs are potentially clobbered here */ \ 588b1ee8a3dSNicholas Piggin additions; \ 589b1ee8a3dSNicholas Piggin addi r3,r1,STACK_FRAME_OVERHEAD; \ 590b1ee8a3dSNicholas Piggin bl hdlr 591b1ee8a3dSNicholas Piggin 592fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 593a3d96f70SNicholas Piggin EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr, \ 594a3d96f70SNicholas Piggin ret_from_except, ADD_NVGPRS;ADD_RECONCILE) 5958aa34ab8SBenjamin Herrenschmidt 5968aa34ab8SBenjamin Herrenschmidt /* 5978aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 5987450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 5997450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 6008aa34ab8SBenjamin Herrenschmidt */ 6017450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 602a3d96f70SNicholas Piggin EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr, \ 603a3d96f70SNicholas Piggin ret_from_except_lite, FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON) 6048aa34ab8SBenjamin Herrenschmidt 6058aa34ab8SBenjamin Herrenschmidt /* 6068aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 6078aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 6088aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 6098aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 6108aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 6118aa34ab8SBenjamin Herrenschmidt */ 6128aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 6138aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 6148aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 6159778b696SStuart Yoder CURRENT_THREAD_INFO(r11, r1); \ 6168aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 6178aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 6188aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 6198aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 6208aa34ab8SBenjamin Herrenschmidt #else 6218aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 6228aa34ab8SBenjamin Herrenschmidt #endif 6238aa34ab8SBenjamin Herrenschmidt 6248aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 625