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 518aa34ab8SBenjamin Herrenschmidt /* 528aa34ab8SBenjamin Herrenschmidt * We're short on space and time in the exception prolog, so we can't 538aa34ab8SBenjamin Herrenschmidt * use the normal SET_REG_IMMEDIATE macro. Normally we just need the 548aa34ab8SBenjamin Herrenschmidt * low halfword of the address, but for Kdump we need the whole low 558aa34ab8SBenjamin Herrenschmidt * word. 568aa34ab8SBenjamin Herrenschmidt */ 578aa34ab8SBenjamin Herrenschmidt #define LOAD_HANDLER(reg, label) \ 588aa34ab8SBenjamin Herrenschmidt addi reg,reg,(label)-_stext; /* virt addr of handler ... */ 598aa34ab8SBenjamin Herrenschmidt 60a5d4f3adSBenjamin Herrenschmidt /* Exception register prefixes */ 61a5d4f3adSBenjamin Herrenschmidt #define EXC_HV H 62a5d4f3adSBenjamin Herrenschmidt #define EXC_STD 63a5d4f3adSBenjamin Herrenschmidt 64673b189aSPaul Mackerras #define EXCEPTION_PROLOG_1(area) \ 652dd60d79SBenjamin Herrenschmidt GET_PACA(r13); \ 668aa34ab8SBenjamin Herrenschmidt std r9,area+EX_R9(r13); /* save r9 - r12 */ \ 678aa34ab8SBenjamin Herrenschmidt std r10,area+EX_R10(r13); \ 688aa34ab8SBenjamin Herrenschmidt std r11,area+EX_R11(r13); \ 698aa34ab8SBenjamin Herrenschmidt std r12,area+EX_R12(r13); \ 7048404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 7148404f2eSPaul Mackerras mfspr r10,SPRN_CFAR; \ 7248404f2eSPaul Mackerras std r10,area+EX_CFAR(r13); \ 7348404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 74673b189aSPaul Mackerras GET_SCRATCH0(r9); \ 758aa34ab8SBenjamin Herrenschmidt std r9,area+EX_R13(r13); \ 768aa34ab8SBenjamin Herrenschmidt mfcr r9 778aa34ab8SBenjamin Herrenschmidt 78a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 798aa34ab8SBenjamin Herrenschmidt ld r12,PACAKBASE(r13); /* get high part of &label */ \ 808aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 81a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 828aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 83a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 84a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 85a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 86a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 878aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 88a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 89a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 908aa34ab8SBenjamin Herrenschmidt 91a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES(area, label, h) \ 92673b189aSPaul Mackerras EXCEPTION_PROLOG_1(area); \ 93a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 94c5a8c0c9SBenjamin Herrenschmidt 958aa34ab8SBenjamin Herrenschmidt /* 968aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 978aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 988aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 998aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 1008aa34ab8SBenjamin Herrenschmidt * 1018aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 1028aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 1038aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 1048aa34ab8SBenjamin Herrenschmidt */ 1058aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 1068aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 1078aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 1088aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 1098aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 1108aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 1118aa34ab8SBenjamin Herrenschmidt 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ 1121977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 1131977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 1148aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 1151977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 1161977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 1178aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 1188aa34ab8SBenjamin Herrenschmidt 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 1198aa34ab8SBenjamin Herrenschmidt std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 1208aa34ab8SBenjamin Herrenschmidt std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 1218aa34ab8SBenjamin Herrenschmidt std r10,0(r1); /* make stack chain pointer */ \ 1228aa34ab8SBenjamin Herrenschmidt std r0,GPR0(r1); /* save r0 in stackframe */ \ 1238aa34ab8SBenjamin Herrenschmidt std r10,GPR1(r1); /* save r1 in stackframe */ \ 1248aa34ab8SBenjamin Herrenschmidt ACCOUNT_CPU_USER_ENTRY(r9, r10); \ 1258aa34ab8SBenjamin Herrenschmidt std r2,GPR2(r1); /* save r2 in stackframe */ \ 1268aa34ab8SBenjamin Herrenschmidt SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 1278aa34ab8SBenjamin Herrenschmidt SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 1288aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 1298aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 1308aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 1318aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 1328aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 1338aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 1348aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 1358aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 1368aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 1378aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 13848404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 13948404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 14048404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 14148404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 1428aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 1438aa34ab8SBenjamin Herrenschmidt mflr r9; /* save LR in stackframe */ \ 1448aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 1458aa34ab8SBenjamin Herrenschmidt mfctr r10; /* save CTR in stackframe */ \ 1468aa34ab8SBenjamin Herrenschmidt std r10,_CTR(r1); \ 1478aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 1488aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 1498aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 1508aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 1518aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 1528aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 1538aa34ab8SBenjamin Herrenschmidt li r10,0; \ 1548aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 1558aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 156cf9efce0SPaul Mackerras std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 157cf9efce0SPaul Mackerras ACCOUNT_STOLEN_TIME 1588aa34ab8SBenjamin Herrenschmidt 1598aa34ab8SBenjamin Herrenschmidt /* 1608aa34ab8SBenjamin Herrenschmidt * Exception vectors. 1618aa34ab8SBenjamin Herrenschmidt */ 162b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_PSERIES(loc, vec, label) \ 163b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 1648aa34ab8SBenjamin Herrenschmidt .globl label##_pSeries; \ 1658aa34ab8SBenjamin Herrenschmidt label##_pSeries: \ 1668aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 167b3e6b5dfSBenjamin Herrenschmidt DO_KVM vec; \ 168673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 169a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, EXC_STD) 1708aa34ab8SBenjamin Herrenschmidt 171b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 172b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 173b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 174b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 1758aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 176b3e6b5dfSBenjamin Herrenschmidt DO_KVM vec; \ 177673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 178a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, EXC_HV) 1798aa34ab8SBenjamin Herrenschmidt 180b3e6b5dfSBenjamin Herrenschmidt #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h) \ 1818aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 182b3e6b5dfSBenjamin Herrenschmidt DO_KVM vec; \ 183673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 1842dd60d79SBenjamin Herrenschmidt GET_PACA(r13); \ 1858aa34ab8SBenjamin Herrenschmidt std r9,PACA_EXGEN+EX_R9(r13); /* save r9, r10 */ \ 1868aa34ab8SBenjamin Herrenschmidt std r10,PACA_EXGEN+EX_R10(r13); \ 1878aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 1888aa34ab8SBenjamin Herrenschmidt mfcr r9; \ 1898aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 190a5d4f3adSBenjamin Herrenschmidt beq masked_##h##interrupt; \ 191673b189aSPaul Mackerras GET_SCRATCH0(r10); \ 1928aa34ab8SBenjamin Herrenschmidt std r10,PACA_EXGEN+EX_R13(r13); \ 1938aa34ab8SBenjamin Herrenschmidt std r11,PACA_EXGEN+EX_R11(r13); \ 1948aa34ab8SBenjamin Herrenschmidt std r12,PACA_EXGEN+EX_R12(r13); \ 1958aa34ab8SBenjamin Herrenschmidt ld r12,PACAKBASE(r13); /* get high part of &label */ \ 1968aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 197a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 1988aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label##_common) \ 199a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 200a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 201a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 202a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 2038aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 204b3e6b5dfSBenjamin Herrenschmidt #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h) \ 205b3e6b5dfSBenjamin Herrenschmidt __MASKABLE_EXCEPTION_PSERIES(vec, label, h) 206b3e6b5dfSBenjamin Herrenschmidt 207b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 208b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 209b3e6b5dfSBenjamin Herrenschmidt .globl label##_pSeries; \ 210b3e6b5dfSBenjamin Herrenschmidt label##_pSeries: \ 211b3e6b5dfSBenjamin Herrenschmidt _MASKABLE_EXCEPTION_PSERIES(vec, label, EXC_STD) 212b3e6b5dfSBenjamin Herrenschmidt 213b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 214b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 215b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 216b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 217b3e6b5dfSBenjamin Herrenschmidt _MASKABLE_EXCEPTION_PSERIES(vec, label, EXC_HV) 2188aa34ab8SBenjamin Herrenschmidt 2198aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_ISERIES 2208aa34ab8SBenjamin Herrenschmidt #define DISABLE_INTS \ 2218aa34ab8SBenjamin Herrenschmidt li r11,0; \ 2228aa34ab8SBenjamin Herrenschmidt stb r11,PACASOFTIRQEN(r13); \ 2238aa34ab8SBenjamin Herrenschmidt BEGIN_FW_FTR_SECTION; \ 2248aa34ab8SBenjamin Herrenschmidt stb r11,PACAHARDIRQEN(r13); \ 2258aa34ab8SBenjamin Herrenschmidt END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES); \ 2268aa34ab8SBenjamin Herrenschmidt TRACE_DISABLE_INTS; \ 2278aa34ab8SBenjamin Herrenschmidt BEGIN_FW_FTR_SECTION; \ 2288aa34ab8SBenjamin Herrenschmidt mfmsr r10; \ 2298aa34ab8SBenjamin Herrenschmidt ori r10,r10,MSR_EE; \ 2308aa34ab8SBenjamin Herrenschmidt mtmsrd r10,1; \ 2318aa34ab8SBenjamin Herrenschmidt END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) 2328aa34ab8SBenjamin Herrenschmidt #else 2338aa34ab8SBenjamin Herrenschmidt #define DISABLE_INTS \ 2348aa34ab8SBenjamin Herrenschmidt li r11,0; \ 2358aa34ab8SBenjamin Herrenschmidt stb r11,PACASOFTIRQEN(r13); \ 2368aa34ab8SBenjamin Herrenschmidt stb r11,PACAHARDIRQEN(r13); \ 2378aa34ab8SBenjamin Herrenschmidt TRACE_DISABLE_INTS 2388aa34ab8SBenjamin Herrenschmidt #endif /* CONFIG_PPC_ISERIES */ 2398aa34ab8SBenjamin Herrenschmidt 2408aa34ab8SBenjamin Herrenschmidt #define ENABLE_INTS \ 2418aa34ab8SBenjamin Herrenschmidt ld r12,_MSR(r1); \ 2428aa34ab8SBenjamin Herrenschmidt mfmsr r11; \ 2438aa34ab8SBenjamin Herrenschmidt rlwimi r11,r12,0,MSR_EE; \ 2448aa34ab8SBenjamin Herrenschmidt mtmsrd r11,1 2458aa34ab8SBenjamin Herrenschmidt 2468aa34ab8SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 2478aa34ab8SBenjamin Herrenschmidt .align 7; \ 2488aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 2498aa34ab8SBenjamin Herrenschmidt label##_common: \ 2508aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 2518aa34ab8SBenjamin Herrenschmidt DISABLE_INTS; \ 2528aa34ab8SBenjamin Herrenschmidt bl .save_nvgprs; \ 2538aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 2548aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 2558aa34ab8SBenjamin Herrenschmidt b .ret_from_except 2568aa34ab8SBenjamin Herrenschmidt 2578aa34ab8SBenjamin Herrenschmidt /* 2588aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 2598aa34ab8SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling. 2608aa34ab8SBenjamin Herrenschmidt */ 2618aa34ab8SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_IDLE(trap, label, hdlr) \ 2628aa34ab8SBenjamin Herrenschmidt .align 7; \ 2638aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 2648aa34ab8SBenjamin Herrenschmidt label##_common: \ 2658aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 2668aa34ab8SBenjamin Herrenschmidt FINISH_NAP; \ 2678aa34ab8SBenjamin Herrenschmidt DISABLE_INTS; \ 2688aa34ab8SBenjamin Herrenschmidt bl .save_nvgprs; \ 2698aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 2708aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 2718aa34ab8SBenjamin Herrenschmidt b .ret_from_except 2728aa34ab8SBenjamin Herrenschmidt 2738aa34ab8SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_LITE(trap, label, hdlr) \ 2748aa34ab8SBenjamin Herrenschmidt .align 7; \ 2758aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 2768aa34ab8SBenjamin Herrenschmidt label##_common: \ 2778aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 2788aa34ab8SBenjamin Herrenschmidt FINISH_NAP; \ 2798aa34ab8SBenjamin Herrenschmidt DISABLE_INTS; \ 2808aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 2818aa34ab8SBenjamin Herrenschmidt bl .ppc64_runlatch_on; \ 2828aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) \ 2838aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 2848aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 2858aa34ab8SBenjamin Herrenschmidt b .ret_from_except_lite 2868aa34ab8SBenjamin Herrenschmidt 2878aa34ab8SBenjamin Herrenschmidt /* 2888aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 2898aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 2908aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 2918aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 2928aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 2938aa34ab8SBenjamin Herrenschmidt */ 2948aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 2958aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 2968aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 2978aa34ab8SBenjamin Herrenschmidt clrrdi r11,r1,THREAD_SHIFT; \ 2988aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 2998aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 3008aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 3018aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 3028aa34ab8SBenjamin Herrenschmidt #else 3038aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 3048aa34ab8SBenjamin Herrenschmidt #endif 3058aa34ab8SBenjamin Herrenschmidt 3068aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 307