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 */ 378aa34ab8SBenjamin Herrenschmidt 388aa34ab8SBenjamin Herrenschmidt #define EX_R9 0 398aa34ab8SBenjamin Herrenschmidt #define EX_R10 8 408aa34ab8SBenjamin Herrenschmidt #define EX_R11 16 418aa34ab8SBenjamin Herrenschmidt #define EX_R12 24 428aa34ab8SBenjamin Herrenschmidt #define EX_R13 32 438aa34ab8SBenjamin Herrenschmidt #define EX_SRR0 40 448aa34ab8SBenjamin Herrenschmidt #define EX_DAR 48 458aa34ab8SBenjamin Herrenschmidt #define EX_DSISR 56 468aa34ab8SBenjamin Herrenschmidt #define EX_CCR 60 478aa34ab8SBenjamin Herrenschmidt #define EX_R3 64 488aa34ab8SBenjamin Herrenschmidt #define EX_LR 72 4948404f2eSPaul Mackerras #define EX_CFAR 80 50a09688cdSHaren Myneni #define EX_PPR 88 /* SMT thread status register (priority) */ 51bc2e6c6aSMichael Neuling #define EX_CTR 96 528aa34ab8SBenjamin Herrenschmidt 534700dfafSMichael Neuling #ifdef CONFIG_RELOCATABLE 541707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 554700dfafSMichael Neuling ld r12,PACAKBASE(r13); /* get high part of &label */ \ 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 878aa34ab8SBenjamin Herrenschmidt * use the normal SET_REG_IMMEDIATE macro. Normally we just need the 888aa34ab8SBenjamin Herrenschmidt * low halfword of the address, but for Kdump we need the whole low 898aa34ab8SBenjamin Herrenschmidt * word. 908aa34ab8SBenjamin Herrenschmidt */ 918aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 9261e2390eSMichael Neuling /* Handlers must be within 64K of kbase, which must be 64k aligned */ \ 9361e2390eSMichael Neuling ori reg,reg,(label)-_stext; /* virt addr of handler ... */ 948aa34ab8SBenjamin Herrenschmidt 95a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 96a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 97a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 98a5d4f3adSBenjamin Herrenschmidt 994700dfafSMichael Neuling #if defined(CONFIG_RELOCATABLE) 1004700dfafSMichael Neuling /* 101bc2e6c6aSMichael Neuling * If we support interrupts with relocation on AND we're a relocatable kernel, 102bc2e6c6aSMichael Neuling * we need to use CTR to get to the 2nd level handler. So, save/restore it 103bc2e6c6aSMichael Neuling * when required. 1044700dfafSMichael Neuling */ 105bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13) 106bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13) 107bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg 1084700dfafSMichael Neuling #else 109bc2e6c6aSMichael Neuling /* ...else CTR is unused and in register. */ 110bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) 111bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) mfctr reg 112bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) 1134700dfafSMichael Neuling #endif 1144700dfafSMichael Neuling 11513e7a8e8SHaren Myneni /* 11613e7a8e8SHaren Myneni * PPR save/restore macros used in exceptions_64s.S 11713e7a8e8SHaren Myneni * Used for P7 or later processors 11813e7a8e8SHaren Myneni */ 11913e7a8e8SHaren Myneni #define SAVE_PPR(area, ra, rb) \ 12013e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(940) \ 12113e7a8e8SHaren Myneni ld ra,PACACURRENT(r13); \ 12213e7a8e8SHaren Myneni ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \ 12313e7a8e8SHaren Myneni std rb,TASKTHREADPPR(ra); \ 12413e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 12513e7a8e8SHaren Myneni 12613e7a8e8SHaren Myneni #define RESTORE_PPR_PACA(area, ra) \ 12713e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(941) \ 12813e7a8e8SHaren Myneni ld ra,area+EX_PPR(r13); \ 12913e7a8e8SHaren Myneni mtspr SPRN_PPR,ra; \ 13013e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 13113e7a8e8SHaren Myneni 13213e7a8e8SHaren Myneni /* 13313e7a8e8SHaren Myneni * Increase the priority on systems where PPR save/restore is not 13413e7a8e8SHaren Myneni * implemented/ supported. 13513e7a8e8SHaren Myneni */ 13613e7a8e8SHaren Myneni #define HMT_MEDIUM_PPR_DISCARD \ 13713e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(942) \ 13813e7a8e8SHaren Myneni HMT_MEDIUM; \ 13913e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,942) /*non P7*/ 14013e7a8e8SHaren Myneni 14113e7a8e8SHaren Myneni /* 1421707dd16SPaul Mackerras * Get an SPR into a register if the CPU has the given feature 14313e7a8e8SHaren Myneni */ 1441707dd16SPaul Mackerras #define OPT_GET_SPR(ra, spr, ftr) \ 14513e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(943) \ 1461707dd16SPaul Mackerras mfspr ra,spr; \ 1471707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 14813e7a8e8SHaren Myneni 1491707dd16SPaul Mackerras /* 1501707dd16SPaul Mackerras * Save a register to the PACA if the CPU has the given feature 1511707dd16SPaul Mackerras */ 1521707dd16SPaul Mackerras #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \ 1531707dd16SPaul Mackerras BEGIN_FTR_SECTION_NESTED(943) \ 1541707dd16SPaul Mackerras std ra,offset(r13); \ 1551707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 1561707dd16SPaul Mackerras 1571707dd16SPaul Mackerras #define EXCEPTION_PROLOG_0(area) \ 1582dd60d79SBenjamin Herrenschmidt GET_PACA(r13); \ 15944e9309fSHaren Myneni std r9,area+EX_R9(r13); /* save r9 */ \ 1601707dd16SPaul Mackerras OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 1611707dd16SPaul Mackerras HMT_MEDIUM; \ 16244e9309fSHaren Myneni std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 1631707dd16SPaul Mackerras OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 1641707dd16SPaul Mackerras 1651707dd16SPaul Mackerras #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 1661707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 1671707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 168bc2e6c6aSMichael Neuling SAVE_CTR(r10, area); \ 169b01c8b54SPaul Mackerras mfcr r9; \ 170b01c8b54SPaul Mackerras extra(vec); \ 171b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 172b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 173b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 174b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 175b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 176b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(area, extra, vec) 1778aa34ab8SBenjamin Herrenschmidt 178a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 1798aa34ab8SBenjamin Herrenschmidt ld r12,PACAKBASE(r13); /* get high part of &label */ \ 1808aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 181a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1828aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 183a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 184a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 185a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 186a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 1878aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 188a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 189a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 1908aa34ab8SBenjamin Herrenschmidt 191b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 1921707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 193b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 194a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 195c5a8c0c9SBenjamin Herrenschmidt 196b01c8b54SPaul Mackerras #define __KVMTEST(n) \ 1973c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 198b01c8b54SPaul Mackerras cmpwi r10,0; \ 199b01c8b54SPaul Mackerras bne do_kvm_##n 200b01c8b54SPaul Mackerras 201b01c8b54SPaul Mackerras #define __KVM_HANDLER(area, h, n) \ 202b01c8b54SPaul Mackerras do_kvm_##n: \ 2030acb9111SPaul Mackerras BEGIN_FTR_SECTION_NESTED(947) \ 2040acb9111SPaul Mackerras ld r10,area+EX_CFAR(r13); \ 2050acb9111SPaul Mackerras std r10,HSTATE_CFAR(r13); \ 2060acb9111SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 2074b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 2084b8473c9SPaul Mackerras ld r10,area+EX_PPR(r13); \ 2094b8473c9SPaul Mackerras std r10,HSTATE_PPR(r13); \ 2104b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 211b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 2123c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 213b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 2143c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 215b01c8b54SPaul Mackerras li r12,n; \ 216b01c8b54SPaul Mackerras b kvmppc_interrupt 217b01c8b54SPaul Mackerras 218b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 219b01c8b54SPaul Mackerras do_kvm_##n: \ 220b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 221b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 222b01c8b54SPaul Mackerras beq 89f; \ 2233c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 2244b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 2254b8473c9SPaul Mackerras ld r9,area+EX_PPR(r13); \ 2264b8473c9SPaul Mackerras std r9,HSTATE_PPR(r13); \ 2274b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 228b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 2293c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 230b01c8b54SPaul Mackerras li r12,n; \ 231b01c8b54SPaul Mackerras b kvmppc_interrupt; \ 232b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 233b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 234b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 235b01c8b54SPaul Mackerras 236b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 237b01c8b54SPaul Mackerras #define KVMTEST(n) __KVMTEST(n) 238b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 239b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 240b01c8b54SPaul Mackerras 241b01c8b54SPaul Mackerras #else 242b01c8b54SPaul Mackerras #define KVMTEST(n) 243b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 244b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 245b01c8b54SPaul Mackerras #endif 246b01c8b54SPaul Mackerras 247de56a948SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_PR 248de56a948SPaul Mackerras #define KVMTEST_PR(n) __KVMTEST(n) 249de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n) 250de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 251de56a948SPaul Mackerras 252de56a948SPaul Mackerras #else 253de56a948SPaul Mackerras #define KVMTEST_PR(n) 254de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) 255de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) 256de56a948SPaul Mackerras #endif 257de56a948SPaul Mackerras 258b01c8b54SPaul Mackerras #define NOTEST(n) 259b01c8b54SPaul Mackerras 2608aa34ab8SBenjamin Herrenschmidt /* 2618aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 2628aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 2638aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 2648aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 2658aa34ab8SBenjamin Herrenschmidt * 2668aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 2678aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 2688aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 2698aa34ab8SBenjamin Herrenschmidt */ 2708aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 2718aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 2728aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 2738aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 2748aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 2758aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 2768aa34ab8SBenjamin Herrenschmidt 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ 2771977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 2781977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 2798aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 2801977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 2811977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 282bc2e6c6aSMichael Neuling RESTORE_CTR(r1, area); \ 2838aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 2848aa34ab8SBenjamin Herrenschmidt 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 2858aa34ab8SBenjamin Herrenschmidt std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 2868aa34ab8SBenjamin Herrenschmidt std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 2878aa34ab8SBenjamin Herrenschmidt std r10,0(r1); /* make stack chain pointer */ \ 2888aa34ab8SBenjamin Herrenschmidt std r0,GPR0(r1); /* save r0 in stackframe */ \ 2898aa34ab8SBenjamin Herrenschmidt std r10,GPR1(r1); /* save r1 in stackframe */ \ 2905d75b264SHaren Myneni beq 4f; /* if from kernel mode */ \ 2918aa34ab8SBenjamin Herrenschmidt ACCOUNT_CPU_USER_ENTRY(r9, r10); \ 29244e9309fSHaren Myneni SAVE_PPR(area, r9, r10); \ 2935d75b264SHaren Myneni 4: std r2,GPR2(r1); /* save r2 in stackframe */ \ 2948aa34ab8SBenjamin Herrenschmidt SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 2958aa34ab8SBenjamin Herrenschmidt SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 2968aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 2978aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 2988aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 2998aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 3008aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 3018aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 3028aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 3038aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 3048aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 3058aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 30648404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 30748404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 30848404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 30948404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 310bc2e6c6aSMichael Neuling mflr r9; /* Get LR, later save to stack */ \ 3118aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 3128aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 313bc2e6c6aSMichael Neuling GET_CTR(r10, area); \ 3148aa34ab8SBenjamin Herrenschmidt std r10,_CTR(r1); \ 3158aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3168aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 3178aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 3188aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 3198aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 3208aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 3218aa34ab8SBenjamin Herrenschmidt li r10,0; \ 3228aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 3238aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 324cf9efce0SPaul Mackerras std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 325cf9efce0SPaul Mackerras ACCOUNT_STOLEN_TIME 3268aa34ab8SBenjamin Herrenschmidt 3278aa34ab8SBenjamin Herrenschmidt /* 3288aa34ab8SBenjamin Herrenschmidt * Exception vectors. 3298aa34ab8SBenjamin Herrenschmidt */ 330b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_PSERIES(loc, vec, label) \ 331b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 3328aa34ab8SBenjamin Herrenschmidt .globl label##_pSeries; \ 3338aa34ab8SBenjamin Herrenschmidt label##_pSeries: \ 33444e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 335673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 336b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 337de56a948SPaul Mackerras EXC_STD, KVMTEST_PR, vec) 3388aa34ab8SBenjamin Herrenschmidt 3391707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 3401707dd16SPaul Mackerras #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 3411707dd16SPaul Mackerras .globl label##_pSeries; \ 3421707dd16SPaul Mackerras label##_pSeries: \ 3431707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 3441707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD) 3451707dd16SPaul Mackerras 346b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 347b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 348b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 349b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 35044e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 351673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 352b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 353b01c8b54SPaul Mackerras EXC_HV, KVMTEST, vec) 3548aa34ab8SBenjamin Herrenschmidt 3551707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 3561707dd16SPaul Mackerras #define STD_EXCEPTION_HV_OOL(vec, label) \ 3571707dd16SPaul Mackerras .globl label##_hv; \ 3581707dd16SPaul Mackerras label##_hv: \ 3591707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \ 3601707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV) 3611707dd16SPaul Mackerras 3624700dfafSMichael Neuling #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 3634700dfafSMichael Neuling . = loc; \ 3644700dfafSMichael Neuling .globl label##_relon_pSeries; \ 3654700dfafSMichael Neuling label##_relon_pSeries: \ 36644e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 3674700dfafSMichael Neuling /* No guest interrupts come through here */ \ 3684700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 3694700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 370c9f69518SMichael Ellerman EXC_STD, NOTEST, vec) 3714700dfafSMichael Neuling 3721707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 3731707dd16SPaul Mackerras .globl label##_relon_pSeries; \ 3741707dd16SPaul Mackerras label##_relon_pSeries: \ 375c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 3761707dd16SPaul Mackerras EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD) 3771707dd16SPaul Mackerras 3784700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 3794700dfafSMichael Neuling . = loc; \ 3804700dfafSMichael Neuling .globl label##_relon_hv; \ 3814700dfafSMichael Neuling label##_relon_hv: \ 38244e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 3834700dfafSMichael Neuling /* No guest interrupts come through here */ \ 3844700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 3854700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 386c9f69518SMichael Ellerman EXC_HV, NOTEST, vec) 3874700dfafSMichael Neuling 3881707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 3891707dd16SPaul Mackerras .globl label##_relon_hv; \ 3901707dd16SPaul Mackerras label##_relon_hv: \ 391c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 3921707dd16SPaul Mackerras EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV) 3931707dd16SPaul Mackerras 3947230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 3957230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 3967230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x502 PACA_IRQ_EE 3977230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 3987230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x982 PACA_IRQ_DEC 3991dbdafecSIan Munsie #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 400655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 401655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL 4027230c564SBenjamin Herrenschmidt 4037230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 4048aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 4058aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 4067230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 407b01c8b54SPaul Mackerras beq masked_##h##interrupt 4087230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 409b01c8b54SPaul Mackerras 410de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 411de56a948SPaul Mackerras KVMTEST_PR(vec); \ 4127230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 413b01c8b54SPaul Mackerras 414b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 415b01c8b54SPaul Mackerras KVMTEST(vec); \ 4167230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 417b01c8b54SPaul Mackerras 4189e368f29SPaul Mackerras #define SOFTEN_TEST_HV_201(vec) \ 4199e368f29SPaul Mackerras KVMTEST(vec); \ 4207230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 4219e368f29SPaul Mackerras 4224700dfafSMichael Neuling #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 4234700dfafSMichael Neuling #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 4244700dfafSMichael Neuling 425b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 426b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 4271707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 428b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 429b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, h); 4301707dd16SPaul Mackerras 431b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 432b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 433b3e6b5dfSBenjamin Herrenschmidt 434b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 435b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 436b3e6b5dfSBenjamin Herrenschmidt .globl label##_pSeries; \ 437b3e6b5dfSBenjamin Herrenschmidt label##_pSeries: \ 438a485c709SPaul Mackerras HMT_MEDIUM_PPR_DISCARD; \ 439b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 440de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 441b3e6b5dfSBenjamin Herrenschmidt 442b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 443b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 444b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 445b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 446b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 447b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 4488aa34ab8SBenjamin Herrenschmidt 4491707dd16SPaul Mackerras #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 4501707dd16SPaul Mackerras .globl label##_hv; \ 4511707dd16SPaul Mackerras label##_hv: \ 4521707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 4531707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV); 4541707dd16SPaul Mackerras 4554700dfafSMichael Neuling #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 45644e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 4574700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 4581707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 4594700dfafSMichael Neuling __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 4604700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h); 4614700dfafSMichael Neuling #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 4624700dfafSMichael Neuling __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 4634700dfafSMichael Neuling 4644700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 4654700dfafSMichael Neuling . = loc; \ 4664700dfafSMichael Neuling .globl label##_relon_pSeries; \ 4674700dfafSMichael Neuling label##_relon_pSeries: \ 4684700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 4694700dfafSMichael Neuling EXC_STD, SOFTEN_NOTEST_PR) 4704700dfafSMichael Neuling 4714700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 4724700dfafSMichael Neuling . = loc; \ 4734700dfafSMichael Neuling .globl label##_relon_hv; \ 4744700dfafSMichael Neuling label##_relon_hv: \ 4754700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 4764700dfafSMichael Neuling EXC_HV, SOFTEN_NOTEST_HV) 4774700dfafSMichael Neuling 4781707dd16SPaul Mackerras #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 4791707dd16SPaul Mackerras .globl label##_relon_hv; \ 4801707dd16SPaul Mackerras label##_relon_hv: \ 4811707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \ 4821707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV); 4831707dd16SPaul Mackerras 4841b701179SBenjamin Herrenschmidt /* 4851b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 4861b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 4871b701179SBenjamin Herrenschmidt * runlatch, etc... 4881b701179SBenjamin Herrenschmidt */ 4891b701179SBenjamin Herrenschmidt 4901b701179SBenjamin Herrenschmidt /* Exception addition: Hard disable interrupts */ 491de021bb7STiejun Chen #define DISABLE_INTS RECONCILE_IRQ_STATE(r10,r11) 4928aa34ab8SBenjamin Herrenschmidt 493fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 494fe1952fcSBenjamin Herrenschmidt bl .save_nvgprs 495fe1952fcSBenjamin Herrenschmidt 496fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 497fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 4989778b696SStuart Yoder CURRENT_THREAD_INFO(r3, r1); \ 499fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 500fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 501fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 502fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 503fe1952fcSBenjamin Herrenschmidt 504fe1952fcSBenjamin Herrenschmidt #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 5058aa34ab8SBenjamin Herrenschmidt .align 7; \ 5068aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 5078aa34ab8SBenjamin Herrenschmidt label##_common: \ 5088aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 509fe1952fcSBenjamin Herrenschmidt additions; \ 5108aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 5118aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 512fe1952fcSBenjamin Herrenschmidt b ret 513fe1952fcSBenjamin Herrenschmidt 514fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 515fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 516fe1952fcSBenjamin Herrenschmidt ADD_NVGPRS;DISABLE_INTS) 5178aa34ab8SBenjamin Herrenschmidt 5188aa34ab8SBenjamin Herrenschmidt /* 5198aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 5207450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 5217450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 5228aa34ab8SBenjamin Herrenschmidt */ 5237450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 524fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 5250e37739bSMichael Ellerman FINISH_NAP;DISABLE_INTS;RUNLATCH_ON) 5268aa34ab8SBenjamin Herrenschmidt 5278aa34ab8SBenjamin Herrenschmidt /* 5288aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 5298aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 5308aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 5318aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 5328aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 5338aa34ab8SBenjamin Herrenschmidt */ 5348aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 5358aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 5368aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 5379778b696SStuart Yoder CURRENT_THREAD_INFO(r11, r1); \ 5388aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 5398aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 5408aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 5418aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 5428aa34ab8SBenjamin Herrenschmidt #else 5438aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 5448aa34ab8SBenjamin Herrenschmidt #endif 5458aa34ab8SBenjamin Herrenschmidt 5468aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 547