18aa34ab8SBenjamin Herrenschmidt #ifndef _ASM_POWERPC_EXCEPTION_H 28aa34ab8SBenjamin Herrenschmidt #define _ASM_POWERPC_EXCEPTION_H 38aa34ab8SBenjamin Herrenschmidt /* 48aa34ab8SBenjamin Herrenschmidt * Extracted from head_64.S 58aa34ab8SBenjamin Herrenschmidt * 68aa34ab8SBenjamin Herrenschmidt * PowerPC version 78aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) 88aa34ab8SBenjamin Herrenschmidt * 98aa34ab8SBenjamin Herrenschmidt * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP 108aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu> 118aa34ab8SBenjamin Herrenschmidt * Adapted for Power Macintosh by Paul Mackerras. 128aa34ab8SBenjamin Herrenschmidt * Low-level exception handlers and MMU support 138aa34ab8SBenjamin Herrenschmidt * rewritten by Paul Mackerras. 148aa34ab8SBenjamin Herrenschmidt * Copyright (C) 1996 Paul Mackerras. 158aa34ab8SBenjamin Herrenschmidt * 168aa34ab8SBenjamin Herrenschmidt * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and 178aa34ab8SBenjamin Herrenschmidt * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com 188aa34ab8SBenjamin Herrenschmidt * 198aa34ab8SBenjamin Herrenschmidt * This file contains the low-level support and setup for the 208aa34ab8SBenjamin Herrenschmidt * PowerPC-64 platform, including trap and interrupt dispatch. 218aa34ab8SBenjamin Herrenschmidt * 228aa34ab8SBenjamin Herrenschmidt * This program is free software; you can redistribute it and/or 238aa34ab8SBenjamin Herrenschmidt * modify it under the terms of the GNU General Public License 248aa34ab8SBenjamin Herrenschmidt * as published by the Free Software Foundation; either version 258aa34ab8SBenjamin Herrenschmidt * 2 of the License, or (at your option) any later version. 268aa34ab8SBenjamin Herrenschmidt */ 278aa34ab8SBenjamin Herrenschmidt /* 288aa34ab8SBenjamin Herrenschmidt * The following macros define the code that appears as 298aa34ab8SBenjamin Herrenschmidt * the prologue to each of the exception handlers. They 308aa34ab8SBenjamin Herrenschmidt * are split into two parts to allow a single kernel binary 318aa34ab8SBenjamin Herrenschmidt * to be used for pSeries and iSeries. 328aa34ab8SBenjamin Herrenschmidt * 338aa34ab8SBenjamin Herrenschmidt * We make as much of the exception code common between native 348aa34ab8SBenjamin Herrenschmidt * exception handlers (including pSeries LPAR) and iSeries LPAR 358aa34ab8SBenjamin Herrenschmidt * implementations as possible. 368aa34ab8SBenjamin Herrenschmidt */ 37da2bc464SMichael Ellerman #include <asm/head-64.h> 388aa34ab8SBenjamin Herrenschmidt 398aa34ab8SBenjamin Herrenschmidt #define EX_R9 0 408aa34ab8SBenjamin Herrenschmidt #define EX_R10 8 418aa34ab8SBenjamin Herrenschmidt #define EX_R11 16 428aa34ab8SBenjamin Herrenschmidt #define EX_R12 24 438aa34ab8SBenjamin Herrenschmidt #define EX_R13 32 448aa34ab8SBenjamin Herrenschmidt #define EX_SRR0 40 458aa34ab8SBenjamin Herrenschmidt #define EX_DAR 48 468aa34ab8SBenjamin Herrenschmidt #define EX_DSISR 56 478aa34ab8SBenjamin Herrenschmidt #define EX_CCR 60 488aa34ab8SBenjamin Herrenschmidt #define EX_R3 64 498aa34ab8SBenjamin Herrenschmidt #define EX_LR 72 5048404f2eSPaul Mackerras #define EX_CFAR 80 51a09688cdSHaren Myneni #define EX_PPR 88 /* SMT thread status register (priority) */ 52bc2e6c6aSMichael Neuling #define EX_CTR 96 538aa34ab8SBenjamin Herrenschmidt 544700dfafSMichael Neuling #ifdef CONFIG_RELOCATABLE 551707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 564700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 574700dfafSMichael Neuling LOAD_HANDLER(r12,label); \ 58bc2e6c6aSMichael Neuling mtctr r12; \ 594700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 604700dfafSMichael Neuling li r10,MSR_RI; \ 614700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 62bc2e6c6aSMichael Neuling bctr; 634700dfafSMichael Neuling #else 644700dfafSMichael Neuling /* If not relocatable, we can jump directly -- and save messing with LR */ 651707dd16SPaul Mackerras #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 664700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 674700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 684700dfafSMichael Neuling li r10,MSR_RI; \ 694700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 704700dfafSMichael Neuling b label; 714700dfafSMichael Neuling #endif 721707dd16SPaul Mackerras #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 731707dd16SPaul Mackerras __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 744700dfafSMichael Neuling 754700dfafSMichael Neuling /* 764700dfafSMichael Neuling * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on 774700dfafSMichael Neuling * so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which 784700dfafSMichael Neuling * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr. 794700dfafSMichael Neuling */ 804700dfafSMichael Neuling #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \ 811707dd16SPaul Mackerras EXCEPTION_PROLOG_0(area); \ 824700dfafSMichael Neuling EXCEPTION_PROLOG_1(area, extra, vec); \ 834700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 844700dfafSMichael Neuling 858aa34ab8SBenjamin Herrenschmidt /* 868aa34ab8SBenjamin Herrenschmidt * We're short on space and time in the exception prolog, so we can't 8727510235SMichael Ellerman * use the normal LOAD_REG_IMMEDIATE macro to load the address of label. 8827510235SMichael Ellerman * Instead we get the base of the kernel from paca->kernelbase and or in the low 8927510235SMichael Ellerman * part of label. This requires that the label be within 64KB of kernelbase, and 9027510235SMichael Ellerman * that kernelbase be 64K aligned. 918aa34ab8SBenjamin Herrenschmidt */ 928aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 93d8d42b05SMichael Ellerman ld reg,PACAKBASE(r13); /* get high part of &label */ \ 94a24553ddSNicholas Piggin ori reg,reg,((label)-_stext)@l; /* virt addr of handler ... */ 958aa34ab8SBenjamin Herrenschmidt 96a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 97a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 98a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 99a5d4f3adSBenjamin Herrenschmidt 1004700dfafSMichael Neuling #if defined(CONFIG_RELOCATABLE) 1014700dfafSMichael Neuling /* 102bc2e6c6aSMichael Neuling * If we support interrupts with relocation on AND we're a relocatable kernel, 103bc2e6c6aSMichael Neuling * we need to use CTR to get to the 2nd level handler. So, save/restore it 104bc2e6c6aSMichael Neuling * when required. 1054700dfafSMichael Neuling */ 106bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13) 107bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13) 108bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg 1094700dfafSMichael Neuling #else 110bc2e6c6aSMichael Neuling /* ...else CTR is unused and in register. */ 111bc2e6c6aSMichael Neuling #define SAVE_CTR(reg, area) 112bc2e6c6aSMichael Neuling #define GET_CTR(reg, area) mfctr reg 113bc2e6c6aSMichael Neuling #define RESTORE_CTR(reg, area) 1144700dfafSMichael Neuling #endif 1154700dfafSMichael Neuling 11613e7a8e8SHaren Myneni /* 11713e7a8e8SHaren Myneni * PPR save/restore macros used in exceptions_64s.S 11813e7a8e8SHaren Myneni * Used for P7 or later processors 11913e7a8e8SHaren Myneni */ 12013e7a8e8SHaren Myneni #define SAVE_PPR(area, ra, rb) \ 12113e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(940) \ 12213e7a8e8SHaren Myneni ld ra,PACACURRENT(r13); \ 12313e7a8e8SHaren Myneni ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \ 12413e7a8e8SHaren Myneni std rb,TASKTHREADPPR(ra); \ 12513e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 12613e7a8e8SHaren Myneni 12713e7a8e8SHaren Myneni #define RESTORE_PPR_PACA(area, ra) \ 12813e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(941) \ 12913e7a8e8SHaren Myneni ld ra,area+EX_PPR(r13); \ 13013e7a8e8SHaren Myneni mtspr SPRN_PPR,ra; \ 13113e7a8e8SHaren Myneni END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 13213e7a8e8SHaren Myneni 13313e7a8e8SHaren Myneni /* 1341707dd16SPaul Mackerras * Get an SPR into a register if the CPU has the given feature 13513e7a8e8SHaren Myneni */ 1361707dd16SPaul Mackerras #define OPT_GET_SPR(ra, spr, ftr) \ 13713e7a8e8SHaren Myneni BEGIN_FTR_SECTION_NESTED(943) \ 1381707dd16SPaul Mackerras mfspr ra,spr; \ 1391707dd16SPaul Mackerras END_FTR_SECTION_NESTED(ftr,ftr,943) 14013e7a8e8SHaren Myneni 1411707dd16SPaul Mackerras /* 142d410ae21SMahesh Salgaonkar * Set an SPR from a register if the CPU has the given feature 143d410ae21SMahesh Salgaonkar */ 144d410ae21SMahesh Salgaonkar #define OPT_SET_SPR(ra, spr, ftr) \ 145d410ae21SMahesh Salgaonkar BEGIN_FTR_SECTION_NESTED(943) \ 146d410ae21SMahesh Salgaonkar mtspr spr,ra; \ 147d410ae21SMahesh Salgaonkar END_FTR_SECTION_NESTED(ftr,ftr,943) 148d410ae21SMahesh Salgaonkar 149d410ae21SMahesh Salgaonkar /* 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 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 195da2bc464SMichael Ellerman #define __KVMTEST(h, n) \ 1963c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 197b01c8b54SPaul Mackerras cmpwi r10,0; \ 198da2bc464SMichael Ellerman bne do_kvm_##h##n 199b01c8b54SPaul Mackerras 200dd96b2c2SAneesh Kumar K.V #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 201dd96b2c2SAneesh Kumar K.V /* 202dd96b2c2SAneesh Kumar K.V * If hv is possible, interrupts come into to the hv version 203dd96b2c2SAneesh Kumar K.V * of the kvmppc_interrupt code, which then jumps to the PR handler, 204dd96b2c2SAneesh Kumar K.V * kvmppc_interrupt_pr, if the guest is a PR guest. 205dd96b2c2SAneesh Kumar K.V */ 206dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_hv 207dd96b2c2SAneesh Kumar K.V #else 208dd96b2c2SAneesh Kumar K.V #define kvmppc_interrupt kvmppc_interrupt_pr 209dd96b2c2SAneesh Kumar K.V #endif 210dd96b2c2SAneesh Kumar K.V 211da2bc464SMichael Ellerman #define __KVM_HANDLER_PROLOG(area, n) \ 2120acb9111SPaul Mackerras BEGIN_FTR_SECTION_NESTED(947) \ 2130acb9111SPaul Mackerras ld r10,area+EX_CFAR(r13); \ 2140acb9111SPaul Mackerras std r10,HSTATE_CFAR(r13); \ 2150acb9111SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 2164b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 2174b8473c9SPaul Mackerras ld r10,area+EX_PPR(r13); \ 2184b8473c9SPaul Mackerras std r10,HSTATE_PPR(r13); \ 2194b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 220b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 2213c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 222b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 2233c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 224da2bc464SMichael Ellerman 225da2bc464SMichael Ellerman #define __KVM_HANDLER(area, h, n) \ 226da2bc464SMichael Ellerman __KVM_HANDLER_PROLOG(area, n) \ 227b01c8b54SPaul Mackerras li r12,n; \ 228b01c8b54SPaul Mackerras b kvmppc_interrupt 229b01c8b54SPaul Mackerras 230b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 231b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 232b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 233b01c8b54SPaul Mackerras beq 89f; \ 2343c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 2354b8473c9SPaul Mackerras BEGIN_FTR_SECTION_NESTED(948) \ 2364b8473c9SPaul Mackerras ld r9,area+EX_PPR(r13); \ 2374b8473c9SPaul Mackerras std r9,HSTATE_PPR(r13); \ 2384b8473c9SPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 239b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 2403c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 241b01c8b54SPaul Mackerras li r12,n; \ 242b01c8b54SPaul Mackerras b kvmppc_interrupt; \ 243b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 244b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 245b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 246b01c8b54SPaul Mackerras 247b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 248da2bc464SMichael Ellerman #define KVMTEST(h, n) __KVMTEST(h, n) 249b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 250b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 251b01c8b54SPaul Mackerras 252b01c8b54SPaul Mackerras #else 253da2bc464SMichael Ellerman #define KVMTEST(h, n) 254b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 255b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 256b01c8b54SPaul Mackerras #endif 257b01c8b54SPaul 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 */ \ 27690ff5d68SMichael Neuling 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* 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 */ \ 291c223c903SChristophe Leroy ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \ 29244e9309fSHaren Myneni SAVE_PPR(area, r9, r10); \ 293b14a7253SMahesh Salgaonkar 4: EXCEPTION_PROLOG_COMMON_2(area) \ 294b14a7253SMahesh Salgaonkar EXCEPTION_PROLOG_COMMON_3(n) \ 295b14a7253SMahesh Salgaonkar ACCOUNT_STOLEN_TIME 296b14a7253SMahesh Salgaonkar 297b14a7253SMahesh Salgaonkar /* Save original regs values from save area to stack frame. */ 298b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_2(area) \ 2998aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 3008aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 3018aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 3028aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 3038aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 3048aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 3058aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 3068aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 3078aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 3088aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 30948404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 31048404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 31148404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 31248404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 313b14a7253SMahesh Salgaonkar GET_CTR(r10, area); \ 314b14a7253SMahesh Salgaonkar std r10,_CTR(r1); 315b14a7253SMahesh Salgaonkar 316b14a7253SMahesh Salgaonkar #define EXCEPTION_PROLOG_COMMON_3(n) \ 317b14a7253SMahesh Salgaonkar std r2,GPR2(r1); /* save r2 in stackframe */ \ 318b14a7253SMahesh Salgaonkar SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 319b14a7253SMahesh Salgaonkar SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 320bc2e6c6aSMichael Neuling mflr r9; /* Get LR, later save to stack */ \ 3218aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 3228aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 3238aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3248aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 3258aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 3268aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 3278aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 3288aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 3298aa34ab8SBenjamin Herrenschmidt li r10,0; \ 3308aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 3318aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 332b14a7253SMahesh Salgaonkar std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ 3338aa34ab8SBenjamin Herrenschmidt 3348aa34ab8SBenjamin Herrenschmidt /* 3358aa34ab8SBenjamin Herrenschmidt * Exception vectors. 3368aa34ab8SBenjamin Herrenschmidt */ 3372613265cSMichael Ellerman #define STD_EXCEPTION_PSERIES(vec, label) \ 338673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 339da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 340da2bc464SMichael Ellerman EXC_STD, KVMTEST_PR, vec); \ 3418aa34ab8SBenjamin Herrenschmidt 3421707dd16SPaul Mackerras /* Version of above for when we have to branch out-of-line */ 343da2bc464SMichael Ellerman #define __OOL_EXCEPTION(vec, label, hdlr) \ 344da2bc464SMichael Ellerman SET_SCRATCH0(r13) \ 345da2bc464SMichael Ellerman EXCEPTION_PROLOG_0(PACA_EXGEN) \ 346da2bc464SMichael Ellerman b hdlr; 347da2bc464SMichael Ellerman 3481707dd16SPaul Mackerras #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 349da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 350da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 3511707dd16SPaul Mackerras 352b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 353673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 354da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 355da2bc464SMichael Ellerman EXC_HV, KVMTEST_HV, vec); 3568aa34ab8SBenjamin Herrenschmidt 3571707dd16SPaul Mackerras #define STD_EXCEPTION_HV_OOL(vec, label) \ 358da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 359da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 3601707dd16SPaul Mackerras 3614700dfafSMichael Neuling #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 3624700dfafSMichael Neuling /* No guest interrupts come through here */ \ 3634700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 364da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec); 3654700dfafSMichael Neuling 3661707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 367c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 368da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD) 3691707dd16SPaul Mackerras 3704700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 3714700dfafSMichael Neuling /* No guest interrupts come through here */ \ 3724700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 373da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_HV, NOTEST, vec); 3744700dfafSMichael Neuling 3751707dd16SPaul Mackerras #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 376c9f69518SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 377da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV) 3781707dd16SPaul Mackerras 3797230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 3807230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 3817230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 382da2bc464SMichael Ellerman #define SOFTEN_VALUE_0x980 PACA_IRQ_DEC 3831dbdafecSIan Munsie #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 384655bb3f4SIan Munsie #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 3850869b6fdSMahesh Salgaonkar #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI 3869baaef0aSBenjamin Herrenschmidt #define SOFTEN_VALUE_0xea0 PACA_IRQ_EE 3877230c564SBenjamin Herrenschmidt 3887230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 3898aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3908aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 3917230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 392b01c8b54SPaul Mackerras beq masked_##h##interrupt 393da2bc464SMichael Ellerman 3947230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 395b01c8b54SPaul Mackerras 396de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 397da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec); \ 3987230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 399b01c8b54SPaul Mackerras 400b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 401da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec); \ 4027230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 403b01c8b54SPaul Mackerras 404da2bc464SMichael Ellerman #define KVMTEST_PR(vec) \ 405da2bc464SMichael Ellerman KVMTEST(EXC_STD, vec) 406da2bc464SMichael Ellerman 407da2bc464SMichael Ellerman #define KVMTEST_HV(vec) \ 408da2bc464SMichael Ellerman KVMTEST(EXC_HV, vec) 409da2bc464SMichael Ellerman 4104700dfafSMichael Neuling #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 4114700dfafSMichael Neuling #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 4124700dfafSMichael Neuling 413b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 414b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 4151707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 416b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 417da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, h); 4181707dd16SPaul Mackerras 419b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 420b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 421b3e6b5dfSBenjamin Herrenschmidt 422b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 423b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 424de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 425b3e6b5dfSBenjamin Herrenschmidt 426da2bc464SMichael Ellerman #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label) \ 427da2bc464SMichael Ellerman EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec); \ 428da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 429da2bc464SMichael Ellerman 430b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 431b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 432b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 4338aa34ab8SBenjamin Herrenschmidt 4341707dd16SPaul Mackerras #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 4351707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 436da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 4371707dd16SPaul Mackerras 4384700dfafSMichael Neuling #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 4394700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 4401707dd16SPaul Mackerras EXCEPTION_PROLOG_0(PACA_EXGEN); \ 4414700dfafSMichael Neuling __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 442da2bc464SMichael Ellerman EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 443da2bc464SMichael Ellerman 4444700dfafSMichael Neuling #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 4454700dfafSMichael Neuling __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 4464700dfafSMichael Neuling 4474700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 4484700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 4494700dfafSMichael Neuling EXC_STD, SOFTEN_NOTEST_PR) 4504700dfafSMichael Neuling 4514700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 4524700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 4534700dfafSMichael Neuling EXC_HV, SOFTEN_NOTEST_HV) 4544700dfafSMichael Neuling 4551707dd16SPaul Mackerras #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 4561707dd16SPaul Mackerras EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \ 457da2bc464SMichael Ellerman EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 4581707dd16SPaul Mackerras 4591b701179SBenjamin Herrenschmidt /* 4601b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 4611b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 4621b701179SBenjamin Herrenschmidt * runlatch, etc... 4631b701179SBenjamin Herrenschmidt */ 4641b701179SBenjamin Herrenschmidt 4659daf112bSMichael Ellerman /* 4669daf112bSMichael Ellerman * This addition reconciles our actual IRQ state with the various software 4679daf112bSMichael Ellerman * flags that track it. This may call C code. 4689daf112bSMichael Ellerman */ 4699daf112bSMichael Ellerman #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11) 4708aa34ab8SBenjamin Herrenschmidt 471fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 472b1576fecSAnton Blanchard bl save_nvgprs 473fe1952fcSBenjamin Herrenschmidt 474fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 475fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 4769778b696SStuart Yoder CURRENT_THREAD_INFO(r3, r1); \ 477fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 478fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 479fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 480fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 481fe1952fcSBenjamin Herrenschmidt 482fe1952fcSBenjamin Herrenschmidt #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 4838aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 484a1d711c5SMichael Ellerman /* Volatile regs are potentially clobbered here */ \ 485fe1952fcSBenjamin Herrenschmidt additions; \ 4868aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 4878aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 488fe1952fcSBenjamin Herrenschmidt b ret 489fe1952fcSBenjamin Herrenschmidt 490fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 491fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 4929daf112bSMichael Ellerman ADD_NVGPRS;ADD_RECONCILE) 4938aa34ab8SBenjamin Herrenschmidt 4948aa34ab8SBenjamin Herrenschmidt /* 4958aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 4967450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 4977450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 4988aa34ab8SBenjamin Herrenschmidt */ 4997450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 500fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 5019daf112bSMichael Ellerman FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON) 5028aa34ab8SBenjamin Herrenschmidt 5038aa34ab8SBenjamin Herrenschmidt /* 5048aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 5058aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 5068aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 5078aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 5088aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 5098aa34ab8SBenjamin Herrenschmidt */ 5108aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 5118aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 5128aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 5139778b696SStuart Yoder CURRENT_THREAD_INFO(r11, r1); \ 5148aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 5158aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 5168aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 5178aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 5188aa34ab8SBenjamin Herrenschmidt #else 5198aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 5208aa34ab8SBenjamin Herrenschmidt #endif 5218aa34ab8SBenjamin Herrenschmidt 5228aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 523