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) */ 518aa34ab8SBenjamin Herrenschmidt 524700dfafSMichael Neuling #ifdef CONFIG_RELOCATABLE 531707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 544700dfafSMichael Neuling ld r12,PACAKBASE(r13); /* get high part of &label */ \ 554700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 564700dfafSMichael Neuling LOAD_HANDLER(r12,label); \ 574700dfafSMichael Neuling mtlr r12; \ 584700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 594700dfafSMichael Neuling li r10,MSR_RI; \ 604700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 614700dfafSMichael Neuling blr; 624700dfafSMichael Neuling #else 634700dfafSMichael Neuling /* If not relocatable, we can jump directly -- and save messing with LR */ 641707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 654700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 664700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 674700dfafSMichael Neuling li r10,MSR_RI; \ 684700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 694700dfafSMichael Neuling b label; 704700dfafSMichael Neuling #endif 711707dd16SPaul Mackerras #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 721707dd16SPaul Mackerras __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 734700dfafSMichael Neuling 744700dfafSMichael Neuling /* 754700dfafSMichael Neuling * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on 764700dfafSMichael Neuling * so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which 774700dfafSMichael Neuling * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr. 784700dfafSMichael Neuling */ 794700dfafSMichael Neuling #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \ 801707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 814700dfafSMichael Neuling EXCEPTION_PROLOG_1(area, extra, vec); \ 824700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 834700dfafSMichael Neuling 848aa34ab8SBenjamin Herrenschmidt /* 858aa34ab8SBenjamin Herrenschmidt * We're short on space and time in the exception prolog, so we can't 868aa34ab8SBenjamin Herrenschmidt * use the normal SET_REG_IMMEDIATE macro. Normally we just need the 878aa34ab8SBenjamin Herrenschmidt * low halfword of the address, but for Kdump we need the whole low 888aa34ab8SBenjamin Herrenschmidt * word. 898aa34ab8SBenjamin Herrenschmidt */ 908aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 9161e2390eSMichael Neuling /* Handlers must be within 64K of kbase, which must be 64k aligned */ \ 9261e2390eSMichael Neuling ori reg,reg,(label)-_stext; /* virt addr of handler ... */ 938aa34ab8SBenjamin Herrenschmidt 94a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 95a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 96a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 97a5d4f3adSBenjamin Herrenschmidt 984700dfafSMichael Neuling #if defined(CONFIG_RELOCATABLE) 994700dfafSMichael Neuling /* 1004700dfafSMichael Neuling * If we support interrupts with relocation on AND we're a relocatable 1014700dfafSMichael Neuling * kernel, we need to use LR to get to the 2nd level handler. So, save/restore 1024700dfafSMichael Neuling * it when required. 1034700dfafSMichael Neuling */ 1044700dfafSMichael Neuling #define SAVE_LR(reg, area) mflr reg ; std reg,area+EX_LR(r13) 1054700dfafSMichael Neuling #define GET_LR(reg, area) ld reg,area+EX_LR(r13) 1064700dfafSMichael Neuling #define RESTORE_LR(reg, area) ld reg,area+EX_LR(r13) ; mtlr reg 1074700dfafSMichael Neuling #else 1084700dfafSMichael Neuling /* ...else LR is unused and in register. */ 1094700dfafSMichael Neuling #define SAVE_LR(reg, area) 1104700dfafSMichael Neuling #define GET_LR(reg, area) mflr reg 1114700dfafSMichael Neuling #define RESTORE_LR(reg, area) 1124700dfafSMichael Neuling #endif 1134700dfafSMichael Neuling 11413e7a8e8SHaren Myneni /* 11513e7a8e8SHaren Myneni * PPR save/restore macros used in exceptions_64s.S 11613e7a8e8SHaren Myneni * Used for P7 or later processors 11713e7a8e8SHaren Myneni */ 11813e7a8e8SHaren Myneni #define SAVE_PPR(area, ra, rb) \ 11913e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(940) \ 12013e7a8e8SHaren Myneni ld ra,PACACURRENT(r13); \ 12113e7a8e8SHaren Myneni ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \ 12213e7a8e8SHaren Myneni std rb,TASKTHREADPPR(ra); \ 12313e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 12413e7a8e8SHaren Myneni 12513e7a8e8SHaren Myneni #define RESTORE_PPR_PACA(area, ra) \ 12613e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(941) \ 12713e7a8e8SHaren Myneni ld ra,area+EX_PPR(r13); \ 12813e7a8e8SHaren Myneni mtspr SPRN_PPR,ra; \ 12913e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 13013e7a8e8SHaren Myneni 13113e7a8e8SHaren Myneni /* 13213e7a8e8SHaren Myneni * Increase the priority on systems where PPR save/restore is not 13313e7a8e8SHaren Myneni * implemented/ supported. 13413e7a8e8SHaren Myneni */ 13513e7a8e8SHaren Myneni #define HMT_MEDIUM_PPR_DISCARD \ 13613e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(942) \ 13713e7a8e8SHaren Myneni HMT_MEDIUM; \ 13813e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,942) /*non P7*/ 13913e7a8e8SHaren Myneni 14013e7a8e8SHaren Myneni /* 1411707dd16SPaul Mackerras * Get an SPR into a register if the CPU has the given feature 14213e7a8e8SHaren Myneni */ 1431707dd16SPaul Mackerras #define OPT_GET_SPR(ra, spr, ftr) \ 14413e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(943) \ 1451707dd16SPaul Mackerras mfspr ra,spr; \ 1461707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 14713e7a8e8SHaren Myneni 1481707dd16SPaul Mackerras /* 1491707dd16SPaul Mackerras * Save a register to the PACA if the CPU has the given feature 1501707dd16SPaul Mackerras */ 1511707dd16SPaul Mackerras #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \ 1521707dd16SPaul Mackerras BEGIN_FTR_SECTION_NESTED(943) \ 1531707dd16SPaul Mackerras std ra,offset(r13); \ 1541707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 1551707dd16SPaul Mackerras 1561707dd16SPaul Mackerras #define EXCEPTION_PROLOG_0(area) \ 1572dd60d79SBenjamin Herrenschmidt GET_PACA(r13); \ 15844e9309fSHaren Myneni std r9,area+EX_R9(r13); /* save r9 */ \ 1591707dd16SPaul Mackerras OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 1601707dd16SPaul Mackerras HMT_MEDIUM; \ 16144e9309fSHaren Myneni std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 1621707dd16SPaul Mackerras OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 1631707dd16SPaul Mackerras 1641707dd16SPaul Mackerras #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 1651707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 1661707dd16SPaul Mackerras OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 167c1fb6816SMichael Neuling SAVE_LR(r10, area); \ 168b01c8b54SPaul Mackerras mfcr r9; \ 169b01c8b54SPaul Mackerras extra(vec); \ 170b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 171b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 172b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 173b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 174b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 175b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(area, extra, vec) 1768aa34ab8SBenjamin Herrenschmidt 177a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 1788aa34ab8SBenjamin Herrenschmidt ld r12,PACAKBASE(r13); /* get high part of &label */ \ 1798aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 180a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1818aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 182a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 183a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 184a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 185a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 1868aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 187a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 188a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 1898aa34ab8SBenjamin Herrenschmidt 190b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 1911707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 192b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 193a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 194c5a8c0c9SBenjamin Herrenschmidt 195b01c8b54SPaul Mackerras #define __KVMTEST(n) \ 1963c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 197b01c8b54SPaul Mackerras cmpwi r10,0; \ 198b01c8b54SPaul Mackerras bne do_kvm_##n 199b01c8b54SPaul Mackerras 200b01c8b54SPaul Mackerras #define __KVM_HANDLER(area, h, n) \ 201b01c8b54SPaul Mackerras do_kvm_##n: \ 2020acb9111SPaul Mackerras BEGIN_FTR_SECTION_NESTED(947) \ 2030acb9111SPaul Mackerras ld r10,area+EX_CFAR(r13); \ 2040acb9111SPaul Mackerras std r10,HSTATE_CFAR(r13); \ 2050acb9111SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 206b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 2073c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 208b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 2093c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 210b01c8b54SPaul Mackerras li r12,n; \ 211b01c8b54SPaul Mackerras b kvmppc_interrupt 212b01c8b54SPaul Mackerras 213b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 214b01c8b54SPaul Mackerras do_kvm_##n: \ 215b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 216b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 217b01c8b54SPaul Mackerras beq 89f; \ 2183c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 219b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 2203c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 221b01c8b54SPaul Mackerras li r12,n; \ 222b01c8b54SPaul Mackerras b kvmppc_interrupt; \ 223b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 224b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 225b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 226b01c8b54SPaul Mackerras 227b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 228b01c8b54SPaul Mackerras #define KVMTEST(n) __KVMTEST(n) 229b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 230b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 231b01c8b54SPaul Mackerras 232b01c8b54SPaul Mackerras #else 233b01c8b54SPaul Mackerras #define KVMTEST(n) 234b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 235b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 236b01c8b54SPaul Mackerras #endif 237b01c8b54SPaul Mackerras 238de56a948SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_PR 239de56a948SPaul Mackerras #define KVMTEST_PR(n) __KVMTEST(n) 240de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n) 241de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 242de56a948SPaul Mackerras 243de56a948SPaul Mackerras #else 244de56a948SPaul Mackerras #define KVMTEST_PR(n) 245de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) 246de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) 247de56a948SPaul Mackerras #endif 248de56a948SPaul Mackerras 249b01c8b54SPaul Mackerras #define NOTEST(n) 250b01c8b54SPaul Mackerras 2518aa34ab8SBenjamin Herrenschmidt /* 2528aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 2538aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 2548aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 2558aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 2568aa34ab8SBenjamin Herrenschmidt * 2578aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 2588aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 2598aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 2608aa34ab8SBenjamin Herrenschmidt */ 2618aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 2628aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 2638aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 2648aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 2658aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 2668aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 2678aa34ab8SBenjamin Herrenschmidt 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ 2681977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 2691977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 2708aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 2711977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 2721977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 273c1fb6816SMichael Neuling RESTORE_LR(r1, area); \ 2748aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 2758aa34ab8SBenjamin Herrenschmidt 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 2768aa34ab8SBenjamin Herrenschmidt std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 2778aa34ab8SBenjamin Herrenschmidt std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 2788aa34ab8SBenjamin Herrenschmidt std r10,0(r1); /* make stack chain pointer */ \ 2798aa34ab8SBenjamin Herrenschmidt std r0,GPR0(r1); /* save r0 in stackframe */ \ 2808aa34ab8SBenjamin Herrenschmidt std r10,GPR1(r1); /* save r1 in stackframe */ \ 2815d75b264SHaren Myneni beq 4f; /* if from kernel mode */ \ 2828aa34ab8SBenjamin Herrenschmidt ACCOUNT_CPU_USER_ENTRY(r9, r10); \ 28344e9309fSHaren Myneni SAVE_PPR(area, r9, r10); \ 2845d75b264SHaren Myneni 4: std r2,GPR2(r1); /* save r2 in stackframe */ \ 2858aa34ab8SBenjamin Herrenschmidt SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 2868aa34ab8SBenjamin Herrenschmidt SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 2878aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 2888aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 2898aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 2908aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 2918aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 2928aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 2938aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 2948aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 2958aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 2968aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 29748404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 29848404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 29948404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 30048404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 301c1fb6816SMichael Neuling GET_LR(r9,area); /* Get LR, later save to stack */ \ 3028aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 3038aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 3048aa34ab8SBenjamin Herrenschmidt mfctr r10; /* save CTR in stackframe */ \ 3058aa34ab8SBenjamin Herrenschmidt std r10,_CTR(r1); \ 3068aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3078aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 3088aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 3098aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 3108aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 3118aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 3128aa34ab8SBenjamin Herrenschmidt li r10,0; \ 3138aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 3148aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 315cf9efce0SPaul Mackerras std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 316cf9efce0SPaul Mackerras ACCOUNT_STOLEN_TIME 3178aa34ab8SBenjamin Herrenschmidt 3188aa34ab8SBenjamin Herrenschmidt /* 3198aa34ab8SBenjamin Herrenschmidt * Exception vectors. 3208aa34ab8SBenjamin Herrenschmidt */ 321b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_PSERIES(loc, vec, label) \ 322b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 3238aa34ab8SBenjamin Herrenschmidt .globl label##_pSeries; \ 3248aa34ab8SBenjamin Herrenschmidt label##_pSeries: \ 32544e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 326673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 327b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 328de56a948SPaul Mackerras EXC_STD, KVMTEST_PR, vec) 3298aa34ab8SBenjamin Herrenschmidt 3301707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 3311707dd16SPaul Mackerras #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 3321707dd16SPaul Mackerras .globl label##_pSeries; \ 3331707dd16SPaul Mackerras label##_pSeries: \ 3341707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 3351707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD) 3361707dd16SPaul Mackerras 337b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 338b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 339b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 340b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 34144e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 342673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 343b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 344b01c8b54SPaul Mackerras EXC_HV, KVMTEST, vec) 3458aa34ab8SBenjamin Herrenschmidt 3461707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 3471707dd16SPaul Mackerras #define STD_EXCEPTION_HV_OOL(vec, label) \ 3481707dd16SPaul Mackerras .globl label##_hv; \ 3491707dd16SPaul Mackerras label##_hv: \ 3501707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \ 3511707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV) 3521707dd16SPaul Mackerras 3534700dfafSMichael Neuling #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 3544700dfafSMichael Neuling . = loc; \ 3554700dfafSMichael Neuling .globl label##_relon_pSeries; \ 3564700dfafSMichael Neuling label##_relon_pSeries: \ 35744e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 3584700dfafSMichael Neuling /* No guest interrupts come through here */ \ 3594700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 3604700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 3614700dfafSMichael Neuling EXC_STD, KVMTEST_PR, vec) 3624700dfafSMichael Neuling 3631707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 3641707dd16SPaul Mackerras .globl label##_relon_pSeries; \ 3651707dd16SPaul Mackerras label##_relon_pSeries: \ 3661707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 3671707dd16SPaul Mackerras EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD) 3681707dd16SPaul Mackerras 3694700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 3704700dfafSMichael Neuling . = loc; \ 3714700dfafSMichael Neuling .globl label##_relon_hv; \ 3724700dfafSMichael Neuling label##_relon_hv: \ 37344e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 3744700dfafSMichael Neuling /* No guest interrupts come through here */ \ 3754700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 3764700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 3774700dfafSMichael Neuling EXC_HV, KVMTEST, vec) 3784700dfafSMichael Neuling 3791707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 3801707dd16SPaul Mackerras .globl label##_relon_hv; \ 3811707dd16SPaul Mackerras label##_relon_hv: \ 3821707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \ 3831707dd16SPaul Mackerras EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV) 3841707dd16SPaul Mackerras 3857230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 3867230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 3877230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x502 PACA_IRQ_EE 3887230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 3897230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x982 PACA_IRQ_DEC 3901dbdafecSIan Munsie #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 391655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 392655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL 3937230c564SBenjamin Herrenschmidt 3947230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 3958aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3968aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 3977230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 398b01c8b54SPaul Mackerras beq masked_##h##interrupt 3997230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 400b01c8b54SPaul Mackerras 401de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 402de56a948SPaul Mackerras KVMTEST_PR(vec); \ 4037230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 404b01c8b54SPaul Mackerras 405b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 406b01c8b54SPaul Mackerras KVMTEST(vec); \ 4077230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 408b01c8b54SPaul Mackerras 4099e368f29SPaul Mackerras #define SOFTEN_TEST_HV_201(vec) \ 4109e368f29SPaul Mackerras KVMTEST(vec); \ 4117230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 4129e368f29SPaul Mackerras 4134700dfafSMichael Neuling #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 4144700dfafSMichael Neuling #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 4154700dfafSMichael Neuling 416b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 41744e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 418b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 4191707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 420b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 421b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, h); 4221707dd16SPaul Mackerras 423b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 424b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 425b3e6b5dfSBenjamin Herrenschmidt 426b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 427b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 428b3e6b5dfSBenjamin Herrenschmidt .globl label##_pSeries; \ 429b3e6b5dfSBenjamin Herrenschmidt label##_pSeries: \ 430b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 431de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 432b3e6b5dfSBenjamin Herrenschmidt 433b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 434b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 435b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 436b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 437b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 438b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 4398aa34ab8SBenjamin Herrenschmidt 4401707dd16SPaul Mackerras #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 4411707dd16SPaul Mackerras .globl label##_hv; \ 4421707dd16SPaul Mackerras label##_hv: \ 4431707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 4441707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV); 4451707dd16SPaul Mackerras 4464700dfafSMichael Neuling #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 44744e9309fSHaren Myneni HMT_MEDIUM_PPR_DISCARD; \ 4484700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 4491707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 4504700dfafSMichael Neuling __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 4514700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h); 4524700dfafSMichael Neuling #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 4534700dfafSMichael Neuling __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 4544700dfafSMichael Neuling 4554700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 4564700dfafSMichael Neuling . = loc; \ 4574700dfafSMichael Neuling .globl label##_relon_pSeries; \ 4584700dfafSMichael Neuling label##_relon_pSeries: \ 4594700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 4604700dfafSMichael Neuling EXC_STD, SOFTEN_NOTEST_PR) 4614700dfafSMichael Neuling 4624700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 4634700dfafSMichael Neuling . = loc; \ 4644700dfafSMichael Neuling .globl label##_relon_hv; \ 4654700dfafSMichael Neuling label##_relon_hv: \ 4664700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 4674700dfafSMichael Neuling EXC_HV, SOFTEN_NOTEST_HV) 4684700dfafSMichael Neuling 4691707dd16SPaul Mackerras #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 4701707dd16SPaul Mackerras .globl label##_relon_hv; \ 4711707dd16SPaul Mackerras label##_relon_hv: \ 4721707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \ 4731707dd16SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV); 4741707dd16SPaul Mackerras 4751b701179SBenjamin Herrenschmidt /* 4761b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 4771b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 4781b701179SBenjamin Herrenschmidt * runlatch, etc... 4791b701179SBenjamin Herrenschmidt */ 4801b701179SBenjamin Herrenschmidt 4811b701179SBenjamin Herrenschmidt /* Exception addition: Hard disable interrupts */ 4827230c564SBenjamin Herrenschmidt #define DISABLE_INTS SOFT_DISABLE_INTS(r10,r11) 4838aa34ab8SBenjamin Herrenschmidt 484fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 485fe1952fcSBenjamin Herrenschmidt bl .save_nvgprs 486fe1952fcSBenjamin Herrenschmidt 487fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 488fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 4899778b696SStuart Yoder CURRENT_THREAD_INFO(r3, r1); \ 490fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 491fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 492fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 493fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 494fe1952fcSBenjamin Herrenschmidt 495fe1952fcSBenjamin Herrenschmidt #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 4968aa34ab8SBenjamin Herrenschmidt .align 7; \ 4978aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 4988aa34ab8SBenjamin Herrenschmidt label##_common: \ 4998aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 500fe1952fcSBenjamin Herrenschmidt additions; \ 5018aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 5028aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 503fe1952fcSBenjamin Herrenschmidt b ret 504fe1952fcSBenjamin Herrenschmidt 505fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 506fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 507fe1952fcSBenjamin Herrenschmidt ADD_NVGPRS;DISABLE_INTS) 5088aa34ab8SBenjamin Herrenschmidt 5098aa34ab8SBenjamin Herrenschmidt /* 5108aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 5117450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 5127450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 5138aa34ab8SBenjamin Herrenschmidt */ 5147450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 515fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 516fe1952fcSBenjamin Herrenschmidt FINISH_NAP;RUNLATCH_ON;DISABLE_INTS) 5178aa34ab8SBenjamin Herrenschmidt 5188aa34ab8SBenjamin Herrenschmidt /* 5198aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 5208aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 5218aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 5228aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 5238aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 5248aa34ab8SBenjamin Herrenschmidt */ 5258aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 5268aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 5278aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 5289778b696SStuart Yoder CURRENT_THREAD_INFO(r11, r1); \ 5298aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 5308aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 5318aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 5328aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 5338aa34ab8SBenjamin Herrenschmidt #else 5348aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 5358aa34ab8SBenjamin Herrenschmidt #endif 5368aa34ab8SBenjamin Herrenschmidt 5378aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 538