12874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 28aa34ab8SBenjamin Herrenschmidt #ifndef _ASM_POWERPC_EXCEPTION_H 38aa34ab8SBenjamin Herrenschmidt #define _ASM_POWERPC_EXCEPTION_H 48aa34ab8SBenjamin Herrenschmidt /* 58aa34ab8SBenjamin Herrenschmidt * Extracted from head_64.S 68aa34ab8SBenjamin Herrenschmidt * 78aa34ab8SBenjamin Herrenschmidt * PowerPC version 88aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) 98aa34ab8SBenjamin Herrenschmidt * 108aa34ab8SBenjamin Herrenschmidt * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP 118aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu> 128aa34ab8SBenjamin Herrenschmidt * Adapted for Power Macintosh by Paul Mackerras. 138aa34ab8SBenjamin Herrenschmidt * Low-level exception handlers and MMU support 148aa34ab8SBenjamin Herrenschmidt * rewritten by Paul Mackerras. 158aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1996 Paul Mackerras. 168aa34ab8SBenjamin Herrenschmidt * 178aa34ab8SBenjamin Herrenschmidt * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and 188aa34ab8SBenjamin Herrenschmidt * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com 198aa34ab8SBenjamin Herrenschmidt * 208aa34ab8SBenjamin Herrenschmidt * This file contains the low-level support and setup for the 218aa34ab8SBenjamin Herrenschmidt * PowerPC-64 platform, including trap and interrupt dispatch. 228aa34ab8SBenjamin Herrenschmidt */ 238aa34ab8SBenjamin Herrenschmidt /* 248aa34ab8SBenjamin Herrenschmidt * The following macros define the code that appears as 258aa34ab8SBenjamin Herrenschmidt * the prologue to each of the exception handlers. They 268aa34ab8SBenjamin Herrenschmidt * are split into two parts to allow a single kernel binary 278aa34ab8SBenjamin Herrenschmidt * to be used for pSeries and iSeries. 288aa34ab8SBenjamin Herrenschmidt * 298aa34ab8SBenjamin Herrenschmidt * We make as much of the exception code common between native 308aa34ab8SBenjamin Herrenschmidt * exception handlers (including pSeries LPAR) and iSeries LPAR 318aa34ab8SBenjamin Herrenschmidt * implementations as possible. 328aa34ab8SBenjamin Herrenschmidt */ 33da2bc464SMichael Ellerman #include <asm/head-64.h> 342c86cd18SChristophe Leroy #include <asm/feature-fixups.h> 358aa34ab8SBenjamin Herrenschmidt 368c388514SNicholas Piggin /* PACA save area offsets (exgen, exmc, etc) */ 378aa34ab8SBenjamin Herrenschmidt #define EX_R9 0 388aa34ab8SBenjamin Herrenschmidt #define EX_R10 8 398aa34ab8SBenjamin Herrenschmidt #define EX_R11 16 408aa34ab8SBenjamin Herrenschmidt #define EX_R12 24 418aa34ab8SBenjamin Herrenschmidt #define EX_R13 32 4236670fcfSNicholas Piggin #define EX_DAR 40 4336670fcfSNicholas Piggin #define EX_DSISR 48 4436670fcfSNicholas Piggin #define EX_CCR 52 45635942aeSNicholas Piggin #define EX_CFAR 56 46635942aeSNicholas Piggin #define EX_PPR 64 478568f1e0SNicholas Piggin #if defined(CONFIG_RELOCATABLE) 48635942aeSNicholas Piggin #define EX_CTR 72 49635942aeSNicholas Piggin #define EX_SIZE 10 /* size in u64 units */ 508568f1e0SNicholas Piggin #else 518568f1e0SNicholas Piggin #define EX_SIZE 9 /* size in u64 units */ 528568f1e0SNicholas Piggin #endif 53dbeea1d6SNicholas Piggin 54dbeea1d6SNicholas Piggin /* 55ba41e1e1SBalbir Singh * maximum recursive depth of MCE exceptions 56ba41e1e1SBalbir Singh */ 57ba41e1e1SBalbir Singh #define MAX_MCE_DEPTH 4 58ba41e1e1SBalbir Singh 59ba41e1e1SBalbir Singh /* 60635942aeSNicholas Piggin * EX_R3 is only used by the bad_stack handler. bad_stack reloads and 61635942aeSNicholas Piggin * saves DAR from SPRN_DAR, and EX_DAR is not used. So EX_R3 can overlap 62635942aeSNicholas Piggin * with EX_DAR. 63635942aeSNicholas Piggin */ 64635942aeSNicholas Piggin #define EX_R3 EX_DAR 65635942aeSNicholas Piggin 66a048a07dSNicholas Piggin #define STF_ENTRY_BARRIER_SLOT \ 67a048a07dSNicholas Piggin STF_ENTRY_BARRIER_FIXUP_SECTION; \ 68a048a07dSNicholas Piggin nop; \ 69a048a07dSNicholas Piggin nop; \ 70a048a07dSNicholas Piggin nop 71a048a07dSNicholas Piggin 72a048a07dSNicholas Piggin #define STF_EXIT_BARRIER_SLOT \ 73a048a07dSNicholas Piggin STF_EXIT_BARRIER_FIXUP_SECTION; \ 74a048a07dSNicholas Piggin nop; \ 75a048a07dSNicholas Piggin nop; \ 76a048a07dSNicholas Piggin nop; \ 77a048a07dSNicholas Piggin nop; \ 78a048a07dSNicholas Piggin nop; \ 79a048a07dSNicholas Piggin nop 80a048a07dSNicholas Piggin 81a048a07dSNicholas Piggin /* 82a048a07dSNicholas Piggin * r10 must be free to use, r13 must be paca 83a048a07dSNicholas Piggin */ 84a048a07dSNicholas Piggin #define INTERRUPT_TO_KERNEL \ 85a048a07dSNicholas Piggin STF_ENTRY_BARRIER_SLOT 86a048a07dSNicholas Piggin 87aa8a5e00SMichael Ellerman /* 88aa8a5e00SMichael Ellerman * Macros for annotating the expected destination of (h)rfid 89aa8a5e00SMichael Ellerman * 90aa8a5e00SMichael Ellerman * The nop instructions allow us to insert one or more instructions to flush the 91aa8a5e00SMichael Ellerman * L1-D cache when returning to userspace or a guest. 92aa8a5e00SMichael Ellerman */ 93aa8a5e00SMichael Ellerman #define RFI_FLUSH_SLOT \ 94aa8a5e00SMichael Ellerman RFI_FLUSH_FIXUP_SECTION; \ 95aa8a5e00SMichael Ellerman nop; \ 96aa8a5e00SMichael Ellerman nop; \ 97aa8a5e00SMichael Ellerman nop 9850e51c13SNicholas Piggin 9950e51c13SNicholas Piggin #define RFI_TO_KERNEL \ 10050e51c13SNicholas Piggin rfid 10150e51c13SNicholas Piggin 10250e51c13SNicholas Piggin #define RFI_TO_USER \ 103a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 104aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 105aa8a5e00SMichael Ellerman rfid; \ 106aa8a5e00SMichael Ellerman b rfi_flush_fallback 10750e51c13SNicholas Piggin 10850e51c13SNicholas Piggin #define RFI_TO_USER_OR_KERNEL \ 109a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 110aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 111aa8a5e00SMichael Ellerman rfid; \ 112aa8a5e00SMichael Ellerman b rfi_flush_fallback 11350e51c13SNicholas Piggin 11450e51c13SNicholas Piggin #define RFI_TO_GUEST \ 115a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 116aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 117aa8a5e00SMichael Ellerman rfid; \ 118aa8a5e00SMichael Ellerman b rfi_flush_fallback 11950e51c13SNicholas Piggin 12050e51c13SNicholas Piggin #define HRFI_TO_KERNEL \ 12150e51c13SNicholas Piggin hrfid 12250e51c13SNicholas Piggin 12350e51c13SNicholas Piggin #define HRFI_TO_USER \ 124a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 125aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 126aa8a5e00SMichael Ellerman hrfid; \ 127aa8a5e00SMichael Ellerman b hrfi_flush_fallback 12850e51c13SNicholas Piggin 12950e51c13SNicholas Piggin #define HRFI_TO_USER_OR_KERNEL \ 130a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 131aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 132aa8a5e00SMichael Ellerman hrfid; \ 133aa8a5e00SMichael Ellerman b hrfi_flush_fallback 13450e51c13SNicholas Piggin 13550e51c13SNicholas Piggin #define HRFI_TO_GUEST \ 136a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 137aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 138aa8a5e00SMichael Ellerman hrfid; \ 139aa8a5e00SMichael Ellerman b hrfi_flush_fallback 14050e51c13SNicholas Piggin 14150e51c13SNicholas Piggin #define HRFI_TO_UNKNOWN \ 142a048a07dSNicholas Piggin STF_EXIT_BARRIER_SLOT; \ 143aa8a5e00SMichael Ellerman RFI_FLUSH_SLOT; \ 144aa8a5e00SMichael Ellerman hrfid; \ 145aa8a5e00SMichael Ellerman b hrfi_flush_fallback 14650e51c13SNicholas Piggin 1474700dfafSMichael Neuling #ifdef CONFIG_RELOCATABLE 1486ebb9397SMichael Ellerman #define __EXCEPTION_PROLOG_2_RELON(label, h) \ 1494700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1504700dfafSMichael Neuling LOAD_HANDLER(r12,label); \ 151bc2e6c6aSMichael Neuling mtctr r12; \ 1524700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 1534700dfafSMichael Neuling li r10,MSR_RI; \ 1544700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 155bc2e6c6aSMichael Neuling bctr; 1564700dfafSMichael Neuling #else 1574700dfafSMichael Neuling /* If not relocatable, we can jump directly -- and save messing with LR */ 1586ebb9397SMichael Ellerman #define __EXCEPTION_PROLOG_2_RELON(label, h) \ 1594700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1604700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 1614700dfafSMichael Neuling li r10,MSR_RI; \ 1624700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 1634700dfafSMichael Neuling b label; 1644700dfafSMichael Neuling #endif 1656ebb9397SMichael Ellerman #define EXCEPTION_PROLOG_2_RELON(label, h) \ 1666ebb9397SMichael Ellerman __EXCEPTION_PROLOG_2_RELON(label, h) 1674700dfafSMichael Neuling 1684700dfafSMichael Neuling /* 169bdf08e1dSMichael Ellerman * As EXCEPTION_PROLOG(), except we've already got relocation on so no need to 170bdf08e1dSMichael Ellerman * rfid. Save LR in case we're CONFIG_RELOCATABLE, in which case 171bdf08e1dSMichael Ellerman * EXCEPTION_PROLOG_2_RELON will be using LR. 1724700dfafSMichael Neuling */ 173270373f1SMichael Ellerman #define EXCEPTION_RELON_PROLOG(area, label, h, extra, vec) \ 17492b6d65cSMichael Ellerman SET_SCRATCH0(r13); /* save r13 */ \ 1751707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 1764700dfafSMichael Neuling EXCEPTION_PROLOG_1(area, extra, vec); \ 1776ebb9397SMichael Ellerman EXCEPTION_PROLOG_2_RELON(label, h) 1784700dfafSMichael Neuling 1798aa34ab8SBenjamin Herrenschmidt /* 1808aa34ab8SBenjamin Herrenschmidt * We're short on space and time in the exception prolog, so we can't 18127510235SMichael Ellerman * use the normal LOAD_REG_IMMEDIATE macro to load the address of label. 18227510235SMichael Ellerman * Instead we get the base of the kernel from paca->kernelbase and or in the low 18327510235SMichael Ellerman * part of label. This requires that the label be within 64KB of kernelbase, and 18427510235SMichael Ellerman * that kernelbase be 64K aligned. 1858aa34ab8SBenjamin Herrenschmidt */ 1868aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 187d8d42b05SMichael Ellerman ld reg,PACAKBASE(r13); /* get high part of &label */ \ 188e6740ae6SHugh Dickins ori reg,reg,FIXED_SYMBOL_ABS_ADDR(label); 1898aa34ab8SBenjamin Herrenschmidt 190fb479e44SNicholas Piggin #define __LOAD_HANDLER(reg, label) \ 191fb479e44SNicholas Piggin ld reg,PACAKBASE(r13); \ 192fb479e44SNicholas Piggin ori reg,reg,(ABS_ADDR(label))@l; 193fb479e44SNicholas Piggin 194a97a65d5SNicholas Piggin /* 195a97a65d5SNicholas Piggin * Branches from unrelocated code (e.g., interrupts) to labels outside 196a97a65d5SNicholas Piggin * head-y require >64K offsets. 197a97a65d5SNicholas Piggin */ 198a97a65d5SNicholas Piggin #define __LOAD_FAR_HANDLER(reg, label) \ 199a97a65d5SNicholas Piggin ld reg,PACAKBASE(r13); \ 200a97a65d5SNicholas Piggin ori reg,reg,(ABS_ADDR(label))@l; \ 201a97a65d5SNicholas Piggin addis reg,reg,(ABS_ADDR(label))@h; 202a97a65d5SNicholas Piggin 203a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 204a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 205a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 206a5d4f3adSBenjamin Herrenschmidt 2074700dfafSMichael Neuling #if defined(CONFIG_RELOCATABLE) 2084700dfafSMichael Neuling /* 209bc2e6c6aSMichael Neuling * If we support interrupts with relocation on AND we're a relocatable kernel, 210bc2e6c6aSMichael Neuling * we need to use CTR to get to the 2nd level handler. So, save/restore it 211bc2e6c6aSMichael Neuling * when required. 2124700dfafSMichael Neuling */ 213bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13) 214bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13) 215bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg 2164700dfafSMichael Neuling #else 217bc2e6c6aSMichael Neuling /* ...else CTR is unused and in register. */ 218bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) 219bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) mfctr reg 220bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) 2214700dfafSMichael Neuling #endif 2224700dfafSMichael Neuling 22313e7a8e8SHaren Myneni /* 22413e7a8e8SHaren Myneni * PPR save/restore macros used in exceptions_64s.S 22513e7a8e8SHaren Myneni * Used for P7 or later processors 22613e7a8e8SHaren Myneni */ 2274c2de74cSNicholas Piggin #define SAVE_PPR(area, ra) \ 22813e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(940) \ 2294c2de74cSNicholas Piggin ld ra,area+EX_PPR(r13); /* Read PPR from paca */ \ 2304c2de74cSNicholas Piggin std ra,_PPR(r1); \ 23113e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 23213e7a8e8SHaren Myneni 23313e7a8e8SHaren Myneni #define RESTORE_PPR_PACA(area, ra) \ 23413e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(941) \ 23513e7a8e8SHaren Myneni ld ra,area+EX_PPR(r13); \ 23613e7a8e8SHaren Myneni mtspr SPRN_PPR,ra; \ 23713e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 23813e7a8e8SHaren Myneni 23913e7a8e8SHaren Myneni /* 2401707dd16SPaul Mackerras * Get an SPR into a register if the CPU has the given feature 24113e7a8e8SHaren Myneni */ 2421707dd16SPaul Mackerras #define OPT_GET_SPR(ra, spr, ftr) \ 24313e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(943) \ 2441707dd16SPaul Mackerras mfspr ra,spr; \ 2451707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 24613e7a8e8SHaren Myneni 2471707dd16SPaul Mackerras /* 248d410ae21SMahesh Salgaonkar * Set an SPR from a register if the CPU has the given feature 249d410ae21SMahesh Salgaonkar */ 250d410ae21SMahesh Salgaonkar #define OPT_SET_SPR(ra, spr, ftr) \ 251d410ae21SMahesh Salgaonkar BEGIN_FTR_SECTION_NESTED(943) \ 252d410ae21SMahesh Salgaonkar mtspr spr,ra; \ 253d410ae21SMahesh Salgaonkar END_FTR_SECTION_NESTED(ftr,ftr,943) 254d410ae21SMahesh Salgaonkar 255d410ae21SMahesh Salgaonkar /* 2561707dd16SPaul Mackerras * Save a register to the PACA if the CPU has the given feature 2571707dd16SPaul Mackerras */ 2581707dd16SPaul Mackerras #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \ 2591707dd16SPaul Mackerras BEGIN_FTR_SECTION_NESTED(943) \ 2601707dd16SPaul Mackerras std ra,offset(r13); \ 2611707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 2621707dd16SPaul Mackerras 263544686caSNicholas Piggin #define EXCEPTION_PROLOG_0(area) \ 264544686caSNicholas Piggin GET_PACA(r13); \ 26544e9309fSHaren Myneni std r9,area+EX_R9(r13); /* save r9 */ \ 2661707dd16SPaul Mackerras OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 2671707dd16SPaul Mackerras HMT_MEDIUM; \ 26844e9309fSHaren Myneni std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 2691707dd16SPaul Mackerras OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 2701707dd16SPaul Mackerras 271f14e953bSMadhavan Srinivasan #define __EXCEPTION_PROLOG_1_PRE(area) \ 2721707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 2731707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 274a048a07dSNicholas Piggin INTERRUPT_TO_KERNEL; \ 275bc2e6c6aSMichael Neuling SAVE_CTR(r10, area); \ 276f14e953bSMadhavan Srinivasan mfcr r9; 277f14e953bSMadhavan Srinivasan 278f14e953bSMadhavan Srinivasan #define __EXCEPTION_PROLOG_1_POST(area) \ 279b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 280b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 281b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 282b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 283f14e953bSMadhavan Srinivasan 284f14e953bSMadhavan Srinivasan /* 285f14e953bSMadhavan Srinivasan * This version of the EXCEPTION_PROLOG_1 will carry 286f14e953bSMadhavan Srinivasan * addition parameter called "bitmask" to support 287f14e953bSMadhavan Srinivasan * checking of the interrupt maskable level in the SOFTEN_TEST. 288f14e953bSMadhavan Srinivasan * Intended to be used in MASKABLE_EXCPETION_* macros. 289f14e953bSMadhavan Srinivasan */ 290f14e953bSMadhavan Srinivasan #define MASKABLE_EXCEPTION_PROLOG_1(area, extra, vec, bitmask) \ 291f14e953bSMadhavan Srinivasan __EXCEPTION_PROLOG_1_PRE(area); \ 292f14e953bSMadhavan Srinivasan extra(vec, bitmask); \ 293f14e953bSMadhavan Srinivasan __EXCEPTION_PROLOG_1_POST(area); 294f14e953bSMadhavan Srinivasan 295f14e953bSMadhavan Srinivasan /* 296f14e953bSMadhavan Srinivasan * This version of the EXCEPTION_PROLOG_1 is intended 297f14e953bSMadhavan Srinivasan * to be used in STD_EXCEPTION* macros 298f14e953bSMadhavan Srinivasan */ 299f14e953bSMadhavan Srinivasan #define _EXCEPTION_PROLOG_1(area, extra, vec) \ 300f14e953bSMadhavan Srinivasan __EXCEPTION_PROLOG_1_PRE(area); \ 301f14e953bSMadhavan Srinivasan extra(vec); \ 302f14e953bSMadhavan Srinivasan __EXCEPTION_PROLOG_1_POST(area); 303f14e953bSMadhavan Srinivasan 304b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 305f14e953bSMadhavan Srinivasan _EXCEPTION_PROLOG_1(area, extra, vec) 3068aa34ab8SBenjamin Herrenschmidt 307cb58a4a4SMichael Ellerman #define __EXCEPTION_PROLOG_2(label, h) \ 3088aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 309a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 3108aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 311a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 312a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 313a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 314222f20f1SNicholas Piggin h##RFI_TO_KERNEL; \ 3158aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 316cb58a4a4SMichael Ellerman #define EXCEPTION_PROLOG_2(label, h) \ 317cb58a4a4SMichael Ellerman __EXCEPTION_PROLOG_2(label, h) 3188aa34ab8SBenjamin Herrenschmidt 31983a980f7SNicholas Piggin /* _NORI variant keeps MSR_RI clear */ 32094f3cc8eSMichael Ellerman #define __EXCEPTION_PROLOG_2_NORI(label, h) \ 32183a980f7SNicholas Piggin ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 32283a980f7SNicholas Piggin xori r10,r10,MSR_RI; /* Clear MSR_RI */ \ 32383a980f7SNicholas Piggin mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 32483a980f7SNicholas Piggin LOAD_HANDLER(r12,label) \ 32583a980f7SNicholas Piggin mtspr SPRN_##h##SRR0,r12; \ 32683a980f7SNicholas Piggin mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 32783a980f7SNicholas Piggin mtspr SPRN_##h##SRR1,r10; \ 328222f20f1SNicholas Piggin h##RFI_TO_KERNEL; \ 32983a980f7SNicholas Piggin b . /* prevent speculative execution */ 33083a980f7SNicholas Piggin 33194f3cc8eSMichael Ellerman #define EXCEPTION_PROLOG_2_NORI(label, h) \ 33294f3cc8eSMichael Ellerman __EXCEPTION_PROLOG_2_NORI(label, h) 33383a980f7SNicholas Piggin 334bdf08e1dSMichael Ellerman #define EXCEPTION_PROLOG(area, label, h, extra, vec) \ 3354a7a0a84SMichael Ellerman SET_SCRATCH0(r13); /* save r13 */ \ 3361707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 337b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 338cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, h); 339c5a8c0c9SBenjamin Herrenschmidt 340da2bc464SMichael Ellerman #define __KVMTEST(h, n) \ 3413c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 342b01c8b54SPaul Mackerras cmpwi r10,0; \ 343da2bc464SMichael Ellerman bne do_kvm_##h##n 344b01c8b54SPaul Mackerras 345dd96b2c2SAneesh Kumar K.V #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 346dd96b2c2SAneesh Kumar K.V /* 347dd96b2c2SAneesh Kumar K.V * If hv is possible, interrupts come into to the hv version 348dd96b2c2SAneesh Kumar K.V * of the kvmppc_interrupt code, which then jumps to the PR handler, 349dd96b2c2SAneesh Kumar K.V * kvmppc_interrupt_pr, if the guest is a PR guest. 350dd96b2c2SAneesh Kumar K.V */ 351dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_hv 352dd96b2c2SAneesh Kumar K.V #else 353dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_pr 354dd96b2c2SAneesh Kumar K.V #endif 355dd96b2c2SAneesh Kumar K.V 356b51351e2SNicholas Piggin /* 357b51351e2SNicholas Piggin * Branch to label using its 0xC000 address. This results in instruction 358b51351e2SNicholas Piggin * address suitable for MSR[IR]=0 or 1, which allows relocation to be turned 359b51351e2SNicholas Piggin * on using mtmsr rather than rfid. 360b51351e2SNicholas Piggin * 361b51351e2SNicholas Piggin * This could set the 0xc bits for !RELOCATABLE as an immediate, rather than 362b51351e2SNicholas Piggin * load KBASE for a slight optimisation. 363b51351e2SNicholas Piggin */ 364b51351e2SNicholas Piggin #define BRANCH_TO_C000(reg, label) \ 365b51351e2SNicholas Piggin __LOAD_HANDLER(reg, label); \ 366b51351e2SNicholas Piggin mtctr reg; \ 367b51351e2SNicholas Piggin bctr 368b51351e2SNicholas Piggin 369fb479e44SNicholas Piggin #ifdef CONFIG_RELOCATABLE 370fb479e44SNicholas Piggin #define BRANCH_TO_COMMON(reg, label) \ 371fb479e44SNicholas Piggin __LOAD_HANDLER(reg, label); \ 372fb479e44SNicholas Piggin mtctr reg; \ 373fb479e44SNicholas Piggin bctr 374fb479e44SNicholas Piggin 375be5c5e84SMichael Ellerman #define BRANCH_LINK_TO_FAR(label) \ 376be5c5e84SMichael Ellerman __LOAD_FAR_HANDLER(r12, label); \ 377be5c5e84SMichael Ellerman mtctr r12; \ 3782337d207SNicholas Piggin bctrl 3792337d207SNicholas Piggin 380a97a65d5SNicholas Piggin /* 381a97a65d5SNicholas Piggin * KVM requires __LOAD_FAR_HANDLER. 382a97a65d5SNicholas Piggin * 383a97a65d5SNicholas Piggin * __BRANCH_TO_KVM_EXIT branches are also a special case because they 384a97a65d5SNicholas Piggin * explicitly use r9 then reload it from PACA before branching. Hence 385a97a65d5SNicholas Piggin * the double-underscore. 386a97a65d5SNicholas Piggin */ 387a97a65d5SNicholas Piggin #define __BRANCH_TO_KVM_EXIT(area, label) \ 388a97a65d5SNicholas Piggin mfctr r9; \ 389a97a65d5SNicholas Piggin std r9,HSTATE_SCRATCH1(r13); \ 390a97a65d5SNicholas Piggin __LOAD_FAR_HANDLER(r9, label); \ 391a97a65d5SNicholas Piggin mtctr r9; \ 392a97a65d5SNicholas Piggin ld r9,area+EX_R9(r13); \ 393a97a65d5SNicholas Piggin bctr 394a97a65d5SNicholas Piggin 395fb479e44SNicholas Piggin #else 396fb479e44SNicholas Piggin #define BRANCH_TO_COMMON(reg, label) \ 397fb479e44SNicholas Piggin b label 398fb479e44SNicholas Piggin 399be5c5e84SMichael Ellerman #define BRANCH_LINK_TO_FAR(label) \ 4002337d207SNicholas Piggin bl label 4012337d207SNicholas Piggin 402a97a65d5SNicholas Piggin #define __BRANCH_TO_KVM_EXIT(area, label) \ 403a97a65d5SNicholas Piggin ld r9,area+EX_R9(r13); \ 404a97a65d5SNicholas Piggin b label 405a97a65d5SNicholas Piggin 406fb479e44SNicholas Piggin #endif 407fb479e44SNicholas Piggin 408c4f3b52cSNicholas Piggin /* Do not enable RI */ 40994f3cc8eSMichael Ellerman #define EXCEPTION_PROLOG_NORI(area, label, h, extra, vec) \ 410c4f3b52cSNicholas Piggin EXCEPTION_PROLOG_0(area); \ 411c4f3b52cSNicholas Piggin EXCEPTION_PROLOG_1(area, extra, vec); \ 41294f3cc8eSMichael Ellerman EXCEPTION_PROLOG_2_NORI(label, h); 413c4f3b52cSNicholas Piggin 414a97a65d5SNicholas Piggin 415d3918e7fSNicholas Piggin #define __KVM_HANDLER(area, h, n) \ 4160acb9111SPaul Mackerras BEGIN_FTR_SECTION_NESTED(947) \ 4170acb9111SPaul Mackerras ld r10,area+EX_CFAR(r13); \ 4180acb9111SPaul Mackerras std r10,HSTATE_CFAR(r13); \ 4190acb9111SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 4204b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 4214b8473c9SPaul Mackerras ld r10,area+EX_PPR(r13); \ 4224b8473c9SPaul Mackerras std r10,HSTATE_PPR(r13); \ 4234b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 424b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 4253c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 426d3918e7fSNicholas Piggin sldi r12,r9,32; \ 427d3918e7fSNicholas Piggin ori r12,r12,(n); \ 428a97a65d5SNicholas Piggin /* This reloads r9 before branching to kvmppc_interrupt */ \ 429a97a65d5SNicholas Piggin __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt) 430b01c8b54SPaul Mackerras 431b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 432b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 433b01c8b54SPaul Mackerras beq 89f; \ 4344b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 435d3918e7fSNicholas Piggin ld r10,area+EX_PPR(r13); \ 436d3918e7fSNicholas Piggin std r10,HSTATE_PPR(r13); \ 4374b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 438d3918e7fSNicholas Piggin ld r10,area+EX_R10(r13); \ 4393c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 440d3918e7fSNicholas Piggin sldi r12,r9,32; \ 441d3918e7fSNicholas Piggin ori r12,r12,(n); \ 442a97a65d5SNicholas Piggin /* This reloads r9 before branching to kvmppc_interrupt */ \ 443a97a65d5SNicholas Piggin __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt); \ 444b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 445b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 446d3918e7fSNicholas Piggin ld r10,area+EX_R10(r13); \ 447b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 448b01c8b54SPaul Mackerras 449b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 450da2bc464SMichael Ellerman #define KVMTEST(h, n) __KVMTEST(h, n) 451b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 452b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 453b01c8b54SPaul Mackerras 454b01c8b54SPaul Mackerras #else 455da2bc464SMichael Ellerman #define KVMTEST(h, n) 456b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 457b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 458b01c8b54SPaul Mackerras #endif 459b01c8b54SPaul Mackerras 460b01c8b54SPaul Mackerras #define NOTEST(n) 461b01c8b54SPaul Mackerras 462a4087a4dSNicholas Piggin #define EXCEPTION_PROLOG_COMMON_1() \ 463a4087a4dSNicholas Piggin std r9,_CCR(r1); /* save CR in stackframe */ \ 464a4087a4dSNicholas Piggin std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 465a4087a4dSNicholas Piggin std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 466a4087a4dSNicholas Piggin std r10,0(r1); /* make stack chain pointer */ \ 467a4087a4dSNicholas Piggin std r0,GPR0(r1); /* save r0 in stackframe */ \ 468a4087a4dSNicholas Piggin std r10,GPR1(r1); /* save r1 in stackframe */ \ 469a4087a4dSNicholas Piggin 470a4087a4dSNicholas Piggin 4718aa34ab8SBenjamin Herrenschmidt /* 4728aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 4738aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 4748aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 4758aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 4768aa34ab8SBenjamin Herrenschmidt * 4778aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 4788aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 4798aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 4808aa34ab8SBenjamin Herrenschmidt */ 4818aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 4828aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 4838aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 4848aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 4858aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 4868aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 48790ff5d68SMichael Neuling 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \ 4881977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 4891977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 4908aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 4911977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 4921977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 493bc2e6c6aSMichael Neuling RESTORE_CTR(r1, area); \ 4948aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 495a4087a4dSNicholas Piggin 3: EXCEPTION_PROLOG_COMMON_1(); \ 496890274c2SMichael Ellerman kuap_save_amr_and_lock r9, r10, cr1, cr0; \ 4975d75b264SHaren Myneni beq 4f; /* if from kernel mode */ \ 498c223c903SChristophe Leroy ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \ 4994c2de74cSNicholas Piggin SAVE_PPR(area, r9); \ 500b14a7253SMahesh Salgaonkar 4: EXCEPTION_PROLOG_COMMON_2(area) \ 501b14a7253SMahesh Salgaonkar EXCEPTION_PROLOG_COMMON_3(n) \ 502b14a7253SMahesh Salgaonkar ACCOUNT_STOLEN_TIME 503b14a7253SMahesh Salgaonkar 504b14a7253SMahesh Salgaonkar /* Save original regs values from save area to stack frame. */ 505b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_2(area) \ 5068aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 5078aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 5088aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 5098aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 5108aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 5118aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 5128aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 5138aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 5148aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 5158aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 51648404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 51748404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 51848404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 51948404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 520b14a7253SMahesh Salgaonkar GET_CTR(r10, area); \ 521b14a7253SMahesh Salgaonkar std r10,_CTR(r1); 522b14a7253SMahesh Salgaonkar 523b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_3(n) \ 524b14a7253SMahesh Salgaonkar std r2,GPR2(r1); /* save r2 in stackframe */ \ 525b14a7253SMahesh Salgaonkar SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 526b14a7253SMahesh Salgaonkar SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 527bc2e6c6aSMichael Neuling mflr r9; /* Get LR, later save to stack */ \ 5288aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 5298aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 5304e26bc4aSMadhavan Srinivasan lbz r10,PACAIRQSOFTMASK(r13); \ 5318aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 5328aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 5338aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 5348aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 5358aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 5368aa34ab8SBenjamin Herrenschmidt li r10,0; \ 5378aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 5388aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 539b14a7253SMahesh Salgaonkar std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ 5408aa34ab8SBenjamin Herrenschmidt 5418aa34ab8SBenjamin Herrenschmidt /* 5428aa34ab8SBenjamin Herrenschmidt * Exception vectors. 5438aa34ab8SBenjamin Herrenschmidt */ 544e899fce5SMichael Ellerman #define STD_EXCEPTION(vec, label) \ 545bdf08e1dSMichael Ellerman EXCEPTION_PROLOG(PACA_EXGEN, label, EXC_STD, KVMTEST_PR, vec); 5468aa34ab8SBenjamin Herrenschmidt 5471707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 548da2bc464SMichael Ellerman #define __OOL_EXCEPTION(vec, label, hdlr) \ 549da2bc464SMichael Ellerman SET_SCRATCH0(r13) \ 550da2bc464SMichael Ellerman EXCEPTION_PROLOG_0(PACA_EXGEN) \ 551da2bc464SMichael Ellerman b hdlr; 552da2bc464SMichael Ellerman 55375e8bef3SMichael Ellerman #define STD_EXCEPTION_OOL(vec, label) \ 554da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 555cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, EXC_STD) 5561707dd16SPaul Mackerras 557b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 558bdf08e1dSMichael Ellerman EXCEPTION_PROLOG(PACA_EXGEN, label, EXC_HV, KVMTEST_HV, vec); 5598aa34ab8SBenjamin Herrenschmidt 5601707dd16SPaul Mackerras #define STD_EXCEPTION_HV_OOL(vec, label) \ 561da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 562cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, EXC_HV) 5631707dd16SPaul Mackerras 564e42389c5SMichael Ellerman #define STD_RELON_EXCEPTION(loc, vec, label) \ 5654700dfafSMichael Neuling /* No guest interrupts come through here */ \ 566270373f1SMichael Ellerman EXCEPTION_RELON_PROLOG(PACA_EXGEN, label, EXC_STD, NOTEST, vec); 5674700dfafSMichael Neuling 568b706f423SMichael Ellerman #define STD_RELON_EXCEPTION_OOL(vec, label) \ 569c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 5706ebb9397SMichael Ellerman EXCEPTION_PROLOG_2_RELON(label, EXC_STD) 5711707dd16SPaul Mackerras 5724700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 573270373f1SMichael Ellerman EXCEPTION_RELON_PROLOG(PACA_EXGEN, label, EXC_HV, KVMTEST_HV, vec); 5744700dfafSMichael Neuling 5751707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 576bc355125SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 5776ebb9397SMichael Ellerman EXCEPTION_PROLOG_2_RELON(label, EXC_HV) 5781707dd16SPaul Mackerras 5797230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 5807230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 5817230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 582da2bc464SMichael Ellerman #define SOFTEN_VALUE_0x980 PACA_IRQ_DEC 5831dbdafecSIan Munsie #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 584655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 5850869b6fdSMahesh Salgaonkar #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI 5869baaef0aSBenjamin Herrenschmidt #define SOFTEN_VALUE_0xea0 PACA_IRQ_EE 587f442d004SMadhavan Srinivasan #define SOFTEN_VALUE_0xf00 PACA_IRQ_PMI 5887230c564SBenjamin Herrenschmidt 589f14e953bSMadhavan Srinivasan #define __SOFTEN_TEST(h, vec, bitmask) \ 5904e26bc4aSMadhavan Srinivasan lbz r10,PACAIRQSOFTMASK(r13); \ 591f14e953bSMadhavan Srinivasan andi. r10,r10,bitmask; \ 5927230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 59301417c6cSMadhavan Srinivasan bne masked_##h##interrupt 594da2bc464SMichael Ellerman 595f14e953bSMadhavan Srinivasan #define _SOFTEN_TEST(h, vec, bitmask) __SOFTEN_TEST(h, vec, bitmask) 596b01c8b54SPaul Mackerras 597f14e953bSMadhavan Srinivasan #define SOFTEN_TEST_PR(vec, bitmask) \ 598da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec); \ 599f14e953bSMadhavan Srinivasan _SOFTEN_TEST(EXC_STD, vec, bitmask) 600b01c8b54SPaul Mackerras 601f14e953bSMadhavan Srinivasan #define SOFTEN_TEST_HV(vec, bitmask) \ 602da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec); \ 603f14e953bSMadhavan Srinivasan _SOFTEN_TEST(EXC_HV, vec, bitmask) 604b01c8b54SPaul Mackerras 605da2bc464SMichael Ellerman #define KVMTEST_PR(vec) \ 606da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec) 607da2bc464SMichael Ellerman 608da2bc464SMichael Ellerman #define KVMTEST_HV(vec) \ 609da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec) 610da2bc464SMichael Ellerman 611f14e953bSMadhavan Srinivasan #define SOFTEN_NOTEST_PR(vec, bitmask) _SOFTEN_TEST(EXC_STD, vec, bitmask) 612f14e953bSMadhavan Srinivasan #define SOFTEN_NOTEST_HV(vec, bitmask) _SOFTEN_TEST(EXC_HV, vec, bitmask) 6134700dfafSMichael Neuling 6140a55c241SMichael Ellerman #define __MASKABLE_EXCEPTION(vec, label, h, extra, bitmask) \ 615b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 6161707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 617f14e953bSMadhavan Srinivasan MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec, bitmask); \ 618cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, h); 6191707dd16SPaul Mackerras 620b536da7cSMichael Ellerman #define MASKABLE_EXCEPTION(vec, label, bitmask) \ 6210a55c241SMichael Ellerman __MASKABLE_EXCEPTION(vec, label, EXC_STD, SOFTEN_TEST_PR, bitmask) 622b3e6b5dfSBenjamin Herrenschmidt 6230a55c241SMichael Ellerman #define MASKABLE_EXCEPTION_OOL(vec, label, bitmask) \ 624f14e953bSMadhavan Srinivasan MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec, bitmask);\ 625cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, EXC_STD) 626da2bc464SMichael Ellerman 627b536da7cSMichael Ellerman #define MASKABLE_EXCEPTION_HV(vec, label, bitmask) \ 6280a55c241SMichael Ellerman __MASKABLE_EXCEPTION(vec, label, EXC_HV, SOFTEN_TEST_HV, bitmask) 6298aa34ab8SBenjamin Herrenschmidt 630f14e953bSMadhavan Srinivasan #define MASKABLE_EXCEPTION_HV_OOL(vec, label, bitmask) \ 631f14e953bSMadhavan Srinivasan MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec, bitmask);\ 632cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, EXC_HV) 6331707dd16SPaul Mackerras 6340a55c241SMichael Ellerman #define __MASKABLE_RELON_EXCEPTION(vec, label, h, extra, bitmask) \ 6354700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 6361707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 637f14e953bSMadhavan Srinivasan MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec, bitmask); \ 6386ebb9397SMichael Ellerman EXCEPTION_PROLOG_2_RELON(label, h) 639da2bc464SMichael Ellerman 640b536da7cSMichael Ellerman #define MASKABLE_RELON_EXCEPTION(vec, label, bitmask) \ 6410a55c241SMichael Ellerman __MASKABLE_RELON_EXCEPTION(vec, label, EXC_STD, SOFTEN_NOTEST_PR, bitmask) 6424700dfafSMichael Neuling 6430a55c241SMichael Ellerman #define MASKABLE_RELON_EXCEPTION_OOL(vec, label, bitmask) \ 644f442d004SMadhavan Srinivasan MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_PR, vec, bitmask);\ 645cb58a4a4SMichael Ellerman EXCEPTION_PROLOG_2(label, EXC_STD); 646f442d004SMadhavan Srinivasan 647b536da7cSMichael Ellerman #define MASKABLE_RELON_EXCEPTION_HV(vec, label, bitmask) \ 6480a55c241SMichael Ellerman __MASKABLE_RELON_EXCEPTION(vec, label, EXC_HV, SOFTEN_TEST_HV, bitmask) 6494700dfafSMichael Neuling 650f14e953bSMadhavan Srinivasan #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label, bitmask) \ 6515c11d1e5SMadhavan Srinivasan MASKABLE_EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec, bitmask);\ 6526ebb9397SMichael Ellerman EXCEPTION_PROLOG_2_RELON(label, EXC_HV) 6531707dd16SPaul Mackerras 6541b701179SBenjamin Herrenschmidt /* 6551b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 6561b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 6571b701179SBenjamin Herrenschmidt * runlatch, etc... 6581b701179SBenjamin Herrenschmidt */ 6591b701179SBenjamin Herrenschmidt 6609daf112bSMichael Ellerman /* 6619daf112bSMichael Ellerman * This addition reconciles our actual IRQ state with the various software 6629daf112bSMichael Ellerman * flags that track it. This may call C code. 6639daf112bSMichael Ellerman */ 6649daf112bSMichael Ellerman #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11) 6658aa34ab8SBenjamin Herrenschmidt 666fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 667b1576fecSAnton Blanchard bl save_nvgprs 668fe1952fcSBenjamin Herrenschmidt 669fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 670fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 671c911d2e1SChristophe Leroy ld r3, PACA_THREAD_INFO(r13); \ 672fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 673fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 674fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 675fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 676fe1952fcSBenjamin Herrenschmidt 677a3d96f70SNicholas Piggin #define EXCEPTION_COMMON(area, trap, label, hdlr, ret, additions) \ 678a3d96f70SNicholas Piggin EXCEPTION_PROLOG_COMMON(trap, area); \ 679a1d711c5SMichael Ellerman /* Volatile regs are potentially clobbered here */ \ 680fe1952fcSBenjamin Herrenschmidt additions; \ 6818aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 6828aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 683fe1952fcSBenjamin Herrenschmidt b ret 684fe1952fcSBenjamin Herrenschmidt 685b1ee8a3dSNicholas Piggin /* 686b1ee8a3dSNicholas Piggin * Exception where stack is already set in r1, r1 is saved in r10, and it 687b1ee8a3dSNicholas Piggin * continues rather than returns. 688b1ee8a3dSNicholas Piggin */ 689b1ee8a3dSNicholas Piggin #define EXCEPTION_COMMON_NORET_STACK(area, trap, label, hdlr, additions) \ 690b1ee8a3dSNicholas Piggin EXCEPTION_PROLOG_COMMON_1(); \ 691890274c2SMichael Ellerman kuap_save_amr_and_lock r9, r10, cr1; \ 692b1ee8a3dSNicholas Piggin EXCEPTION_PROLOG_COMMON_2(area); \ 693b1ee8a3dSNicholas Piggin EXCEPTION_PROLOG_COMMON_3(trap); \ 694b1ee8a3dSNicholas Piggin /* Volatile regs are potentially clobbered here */ \ 695b1ee8a3dSNicholas Piggin additions; \ 696b1ee8a3dSNicholas Piggin addi r3,r1,STACK_FRAME_OVERHEAD; \ 697b1ee8a3dSNicholas Piggin bl hdlr 698b1ee8a3dSNicholas Piggin 699fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 700a3d96f70SNicholas Piggin EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr, \ 701a3d96f70SNicholas Piggin ret_from_except, ADD_NVGPRS;ADD_RECONCILE) 7028aa34ab8SBenjamin Herrenschmidt 7038aa34ab8SBenjamin Herrenschmidt /* 7048aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 7057450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 7067450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 7078aa34ab8SBenjamin Herrenschmidt */ 7087450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 709a3d96f70SNicholas Piggin EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr, \ 710a3d96f70SNicholas Piggin ret_from_except_lite, FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON) 7118aa34ab8SBenjamin Herrenschmidt 7128aa34ab8SBenjamin Herrenschmidt /* 7138aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 7148aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 7158aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 7168aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 7178aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 7188aa34ab8SBenjamin Herrenschmidt */ 7198aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 7208aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 7218aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 722c911d2e1SChristophe Leroy ld r11, PACA_THREAD_INFO(r13); \ 7238aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 7248aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 7258aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 7268aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 7278aa34ab8SBenjamin Herrenschmidt #else 7288aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 7298aa34ab8SBenjamin Herrenschmidt #endif 7308aa34ab8SBenjamin Herrenschmidt 7318aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 732