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 508aa34ab8SBenjamin Herrenschmidt 514700dfafSMichael Neuling #ifdef CONFIG_RELOCATABLE 524700dfafSMichael Neuling #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 534700dfafSMichael Neuling ld r12,PACAKBASE(r13); /* get high part of &label */ \ 544700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 554700dfafSMichael Neuling LOAD_HANDLER(r12,label); \ 564700dfafSMichael Neuling mtlr r12; \ 574700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 584700dfafSMichael Neuling li r10,MSR_RI; \ 594700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 604700dfafSMichael Neuling blr; 614700dfafSMichael Neuling #else 624700dfafSMichael Neuling /* If not relocatable, we can jump directly -- and save messing with LR */ 634700dfafSMichael Neuling #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 644700dfafSMichael Neuling mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 654700dfafSMichael Neuling mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 664700dfafSMichael Neuling li r10,MSR_RI; \ 674700dfafSMichael Neuling mtmsrd r10,1; /* Set RI (EE=0) */ \ 684700dfafSMichael Neuling b label; 694700dfafSMichael Neuling #endif 704700dfafSMichael Neuling 714700dfafSMichael Neuling /* 724700dfafSMichael Neuling * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on 734700dfafSMichael Neuling * so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which 744700dfafSMichael Neuling * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr. 754700dfafSMichael Neuling */ 764700dfafSMichael Neuling #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \ 774700dfafSMichael Neuling EXCEPTION_PROLOG_1(area, extra, vec); \ 784700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 794700dfafSMichael Neuling 808aa34ab8SBenjamin Herrenschmidt /* 818aa34ab8SBenjamin Herrenschmidt * We're short on space and time in the exception prolog, so we can't 828aa34ab8SBenjamin Herrenschmidt * use the normal SET_REG_IMMEDIATE macro. Normally we just need the 838aa34ab8SBenjamin Herrenschmidt * low halfword of the address, but for Kdump we need the whole low 848aa34ab8SBenjamin Herrenschmidt * word. 858aa34ab8SBenjamin Herrenschmidt */ 868aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 8761e2390eSMichael Neuling /* Handlers must be within 64K of kbase, which must be 64k aligned */ \ 8861e2390eSMichael Neuling ori reg,reg,(label)-_stext; /* virt addr of handler ... */ 898aa34ab8SBenjamin Herrenschmidt 90a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 91a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 92a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 93a5d4f3adSBenjamin Herrenschmidt 944700dfafSMichael Neuling #if defined(CONFIG_RELOCATABLE) 954700dfafSMichael Neuling /* 964700dfafSMichael Neuling * If we support interrupts with relocation on AND we're a relocatable 974700dfafSMichael Neuling * kernel, we need to use LR to get to the 2nd level handler. So, save/restore 984700dfafSMichael Neuling * it when required. 994700dfafSMichael Neuling */ 1004700dfafSMichael Neuling #define SAVE_LR(reg, area) mflr reg ; std reg,area+EX_LR(r13) 1014700dfafSMichael Neuling #define GET_LR(reg, area) ld reg,area+EX_LR(r13) 1024700dfafSMichael Neuling #define RESTORE_LR(reg, area) ld reg,area+EX_LR(r13) ; mtlr reg 1034700dfafSMichael Neuling #else 1044700dfafSMichael Neuling /* ...else LR is unused and in register. */ 1054700dfafSMichael Neuling #define SAVE_LR(reg, area) 1064700dfafSMichael Neuling #define GET_LR(reg, area) mflr reg 1074700dfafSMichael Neuling #define RESTORE_LR(reg, area) 1084700dfafSMichael Neuling #endif 1094700dfafSMichael Neuling 110b01c8b54SPaul Mackerras #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 1112dd60d79SBenjamin Herrenschmidt GET_PACA(r13); \ 1128aa34ab8SBenjamin Herrenschmidt std r9,area+EX_R9(r13); /* save r9 - r12 */ \ 1138aa34ab8SBenjamin Herrenschmidt std r10,area+EX_R10(r13); \ 11448404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 11548404f2eSPaul Mackerras mfspr r10,SPRN_CFAR; \ 11648404f2eSPaul Mackerras std r10,area+EX_CFAR(r13); \ 11748404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 118b01c8b54SPaul Mackerras mfcr r9; \ 119b01c8b54SPaul Mackerras extra(vec); \ 120b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 121b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 122b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 123b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 124b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 125b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(area, extra, vec) 1268aa34ab8SBenjamin Herrenschmidt 127a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 1288aa34ab8SBenjamin Herrenschmidt ld r12,PACAKBASE(r13); /* get high part of &label */ \ 1298aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 130a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1318aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 132a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 133a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 134a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 135a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 1368aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 137a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 138a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 1398aa34ab8SBenjamin Herrenschmidt 140b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 141b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 142a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 143c5a8c0c9SBenjamin Herrenschmidt 144b01c8b54SPaul Mackerras #define __KVMTEST(n) \ 1453c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 146b01c8b54SPaul Mackerras cmpwi r10,0; \ 147b01c8b54SPaul Mackerras bne do_kvm_##n 148b01c8b54SPaul Mackerras 149b01c8b54SPaul Mackerras #define __KVM_HANDLER(area, h, n) \ 150b01c8b54SPaul Mackerras do_kvm_##n: \ 151b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 1523c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 153b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 1543c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 155b01c8b54SPaul Mackerras li r12,n; \ 156b01c8b54SPaul Mackerras b kvmppc_interrupt 157b01c8b54SPaul Mackerras 158b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 159b01c8b54SPaul Mackerras do_kvm_##n: \ 160b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 161b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 162b01c8b54SPaul Mackerras beq 89f; \ 1633c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 164b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 1653c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 166b01c8b54SPaul Mackerras li r12,n; \ 167b01c8b54SPaul Mackerras b kvmppc_interrupt; \ 168b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 169b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 170b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 171b01c8b54SPaul Mackerras 172b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 173b01c8b54SPaul Mackerras #define KVMTEST(n) __KVMTEST(n) 174b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 175b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 176b01c8b54SPaul Mackerras 177b01c8b54SPaul Mackerras #else 178b01c8b54SPaul Mackerras #define KVMTEST(n) 179b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 180b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 181b01c8b54SPaul Mackerras #endif 182b01c8b54SPaul Mackerras 183de56a948SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_PR 184de56a948SPaul Mackerras #define KVMTEST_PR(n) __KVMTEST(n) 185de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n) 186de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 187de56a948SPaul Mackerras 188de56a948SPaul Mackerras #else 189de56a948SPaul Mackerras #define KVMTEST_PR(n) 190de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) 191de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) 192de56a948SPaul Mackerras #endif 193de56a948SPaul Mackerras 194b01c8b54SPaul Mackerras #define NOTEST(n) 195b01c8b54SPaul Mackerras 1968aa34ab8SBenjamin Herrenschmidt /* 1978aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 1988aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 1998aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 2008aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 2018aa34ab8SBenjamin Herrenschmidt * 2028aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 2038aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 2048aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 2058aa34ab8SBenjamin Herrenschmidt */ 2068aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 2078aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 2088aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 2098aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 2108aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 2118aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 2128aa34ab8SBenjamin Herrenschmidt 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ 2131977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 2141977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 2158aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 2161977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 2171977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 2188aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 2198aa34ab8SBenjamin Herrenschmidt 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 2208aa34ab8SBenjamin Herrenschmidt std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 2218aa34ab8SBenjamin Herrenschmidt std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 2228aa34ab8SBenjamin Herrenschmidt std r10,0(r1); /* make stack chain pointer */ \ 2238aa34ab8SBenjamin Herrenschmidt std r0,GPR0(r1); /* save r0 in stackframe */ \ 2248aa34ab8SBenjamin Herrenschmidt std r10,GPR1(r1); /* save r1 in stackframe */ \ 2258aa34ab8SBenjamin Herrenschmidt ACCOUNT_CPU_USER_ENTRY(r9, r10); \ 2268aa34ab8SBenjamin Herrenschmidt std r2,GPR2(r1); /* save r2 in stackframe */ \ 2278aa34ab8SBenjamin Herrenschmidt SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 2288aa34ab8SBenjamin Herrenschmidt SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 2298aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 2308aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 2318aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 2328aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 2338aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 2348aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 2358aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 2368aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 2378aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 2388aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 23948404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 24048404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 24148404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 24248404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 2438aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 2448aa34ab8SBenjamin Herrenschmidt mflr r9; /* save LR in stackframe */ \ 2458aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 2468aa34ab8SBenjamin Herrenschmidt mfctr r10; /* save CTR in stackframe */ \ 2478aa34ab8SBenjamin Herrenschmidt std r10,_CTR(r1); \ 2488aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 2498aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 2508aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 2518aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 2528aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 2538aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 2548aa34ab8SBenjamin Herrenschmidt li r10,0; \ 2558aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 2568aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 257cf9efce0SPaul Mackerras std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 258cf9efce0SPaul Mackerras ACCOUNT_STOLEN_TIME 2598aa34ab8SBenjamin Herrenschmidt 2608aa34ab8SBenjamin Herrenschmidt /* 2618aa34ab8SBenjamin Herrenschmidt * Exception vectors. 2628aa34ab8SBenjamin Herrenschmidt */ 263b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_PSERIES(loc, vec, label) \ 264b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 2658aa34ab8SBenjamin Herrenschmidt .globl label##_pSeries; \ 2668aa34ab8SBenjamin Herrenschmidt label##_pSeries: \ 2678aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 268673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 269b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 270de56a948SPaul Mackerras EXC_STD, KVMTEST_PR, vec) 2718aa34ab8SBenjamin Herrenschmidt 272b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 273b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 274b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 275b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 2768aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 277673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 278b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 279b01c8b54SPaul Mackerras EXC_HV, KVMTEST, vec) 2808aa34ab8SBenjamin Herrenschmidt 2814700dfafSMichael Neuling #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 2824700dfafSMichael Neuling . = loc; \ 2834700dfafSMichael Neuling .globl label##_relon_pSeries; \ 2844700dfafSMichael Neuling label##_relon_pSeries: \ 2854700dfafSMichael Neuling HMT_MEDIUM; \ 2864700dfafSMichael Neuling /* No guest interrupts come through here */ \ 2874700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 2884700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 2894700dfafSMichael Neuling EXC_STD, KVMTEST_PR, vec) 2904700dfafSMichael Neuling 2914700dfafSMichael Neuling #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 2924700dfafSMichael Neuling . = loc; \ 2934700dfafSMichael Neuling .globl label##_relon_hv; \ 2944700dfafSMichael Neuling label##_relon_hv: \ 2954700dfafSMichael Neuling HMT_MEDIUM; \ 2964700dfafSMichael Neuling /* No guest interrupts come through here */ \ 2974700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 2984700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 2994700dfafSMichael Neuling EXC_HV, KVMTEST, vec) 3004700dfafSMichael Neuling 3017230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 3027230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 3037230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x502 PACA_IRQ_EE 3047230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 3057230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x982 PACA_IRQ_DEC 3067230c564SBenjamin Herrenschmidt 3077230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 3088aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 3098aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 3107230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 311b01c8b54SPaul Mackerras beq masked_##h##interrupt 3127230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 313b01c8b54SPaul Mackerras 314de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 315de56a948SPaul Mackerras KVMTEST_PR(vec); \ 3167230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 317b01c8b54SPaul Mackerras 318b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 319b01c8b54SPaul Mackerras KVMTEST(vec); \ 3207230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 321b01c8b54SPaul Mackerras 3229e368f29SPaul Mackerras #define SOFTEN_TEST_HV_201(vec) \ 3239e368f29SPaul Mackerras KVMTEST(vec); \ 3247230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 3259e368f29SPaul Mackerras 3264700dfafSMichael Neuling #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 3274700dfafSMichael Neuling #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 3284700dfafSMichael Neuling 329b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 330b01c8b54SPaul Mackerras HMT_MEDIUM; \ 331b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 332b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 333b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, h); 334b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 335b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 336b3e6b5dfSBenjamin Herrenschmidt 337b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 338b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 339b3e6b5dfSBenjamin Herrenschmidt .globl label##_pSeries; \ 340b3e6b5dfSBenjamin Herrenschmidt label##_pSeries: \ 341b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 342de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 343b3e6b5dfSBenjamin Herrenschmidt 344b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 345b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 346b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 347b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 348b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 349b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 3508aa34ab8SBenjamin Herrenschmidt 3514700dfafSMichael Neuling #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 3524700dfafSMichael Neuling HMT_MEDIUM; \ 3534700dfafSMichael Neuling SET_SCRATCH0(r13); /* save r13 */ \ 3544700dfafSMichael Neuling __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 3554700dfafSMichael Neuling EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h); 3564700dfafSMichael Neuling #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 3574700dfafSMichael Neuling __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 3584700dfafSMichael Neuling 3594700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 3604700dfafSMichael Neuling . = loc; \ 3614700dfafSMichael Neuling .globl label##_relon_pSeries; \ 3624700dfafSMichael Neuling label##_relon_pSeries: \ 3634700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 3644700dfafSMichael Neuling EXC_STD, SOFTEN_NOTEST_PR) 3654700dfafSMichael Neuling 3664700dfafSMichael Neuling #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 3674700dfafSMichael Neuling . = loc; \ 3684700dfafSMichael Neuling .globl label##_relon_hv; \ 3694700dfafSMichael Neuling label##_relon_hv: \ 3704700dfafSMichael Neuling _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 3714700dfafSMichael Neuling EXC_HV, SOFTEN_NOTEST_HV) 3724700dfafSMichael Neuling 3731b701179SBenjamin Herrenschmidt /* 3741b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 3751b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 3761b701179SBenjamin Herrenschmidt * runlatch, etc... 3771b701179SBenjamin Herrenschmidt */ 3781b701179SBenjamin Herrenschmidt 3791b701179SBenjamin Herrenschmidt /* Exception addition: Hard disable interrupts */ 3807230c564SBenjamin Herrenschmidt #define DISABLE_INTS SOFT_DISABLE_INTS(r10,r11) 3818aa34ab8SBenjamin Herrenschmidt 382fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 383fe1952fcSBenjamin Herrenschmidt bl .save_nvgprs 384fe1952fcSBenjamin Herrenschmidt 385fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 386fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 3879778b696SStuart Yoder CURRENT_THREAD_INFO(r3, r1); \ 388fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 389fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 390fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 391fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 392fe1952fcSBenjamin Herrenschmidt 393fe1952fcSBenjamin Herrenschmidt #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 3948aa34ab8SBenjamin Herrenschmidt .align 7; \ 3958aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 3968aa34ab8SBenjamin Herrenschmidt label##_common: \ 3978aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 398fe1952fcSBenjamin Herrenschmidt additions; \ 3998aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 4008aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 401fe1952fcSBenjamin Herrenschmidt b ret 402fe1952fcSBenjamin Herrenschmidt 403fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 404fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 405fe1952fcSBenjamin Herrenschmidt ADD_NVGPRS;DISABLE_INTS) 4068aa34ab8SBenjamin Herrenschmidt 4078aa34ab8SBenjamin Herrenschmidt /* 4088aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 4097450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 4107450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 4118aa34ab8SBenjamin Herrenschmidt */ 4127450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 413fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 414fe1952fcSBenjamin Herrenschmidt FINISH_NAP;RUNLATCH_ON;DISABLE_INTS) 4158aa34ab8SBenjamin Herrenschmidt 4168aa34ab8SBenjamin Herrenschmidt /* 4178aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 4188aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 4198aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 4208aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 4218aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 4228aa34ab8SBenjamin Herrenschmidt */ 4238aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 4248aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 4258aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 4269778b696SStuart Yoder CURRENT_THREAD_INFO(r11, r1); \ 4278aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 4288aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 4298aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 4308aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 4318aa34ab8SBenjamin Herrenschmidt #else 4328aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 4338aa34ab8SBenjamin Herrenschmidt #endif 4348aa34ab8SBenjamin Herrenschmidt 4358aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 436