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 64b01c8b54SPaul Mackerras #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 652dd60d79SBenjamin Herrenschmidt GET_PACA(r13); \ 668aa34ab8SBenjamin Herrenschmidt std r9,area+EX_R9(r13); /* save r9 - r12 */ \ 678aa34ab8SBenjamin Herrenschmidt std r10,area+EX_R10(r13); \ 6848404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 6948404f2eSPaul Mackerras mfspr r10,SPRN_CFAR; \ 7048404f2eSPaul Mackerras std r10,area+EX_CFAR(r13); \ 7148404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 72b01c8b54SPaul Mackerras mfcr r9; \ 73b01c8b54SPaul Mackerras extra(vec); \ 74b01c8b54SPaul Mackerras std r11,area+EX_R11(r13); \ 75b01c8b54SPaul Mackerras std r12,area+EX_R12(r13); \ 76b01c8b54SPaul Mackerras GET_SCRATCH0(r10); \ 77b01c8b54SPaul Mackerras std r10,area+EX_R13(r13) 78b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_1(area, extra, vec) \ 79b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(area, extra, vec) 808aa34ab8SBenjamin Herrenschmidt 81a5d4f3adSBenjamin Herrenschmidt #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 828aa34ab8SBenjamin Herrenschmidt ld r12,PACAKBASE(r13); /* get high part of &label */ \ 838aa34ab8SBenjamin Herrenschmidt ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 84a5d4f3adSBenjamin Herrenschmidt mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 858aa34ab8SBenjamin Herrenschmidt LOAD_HANDLER(r12,label) \ 86a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR0,r12; \ 87a5d4f3adSBenjamin Herrenschmidt mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 88a5d4f3adSBenjamin Herrenschmidt mtspr SPRN_##h##SRR1,r10; \ 89a5d4f3adSBenjamin Herrenschmidt h##rfid; \ 908aa34ab8SBenjamin Herrenschmidt b . /* prevent speculative execution */ 91a5d4f3adSBenjamin Herrenschmidt #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 92a5d4f3adSBenjamin Herrenschmidt __EXCEPTION_PROLOG_PSERIES_1(label, h) 938aa34ab8SBenjamin Herrenschmidt 94b01c8b54SPaul Mackerras #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 95b01c8b54SPaul Mackerras EXCEPTION_PROLOG_1(area, extra, vec); \ 96a5d4f3adSBenjamin Herrenschmidt EXCEPTION_PROLOG_PSERIES_1(label, h); 97c5a8c0c9SBenjamin Herrenschmidt 98b01c8b54SPaul Mackerras #define __KVMTEST(n) \ 993c42bf8aSPaul Mackerras lbz r10,HSTATE_IN_GUEST(r13); \ 100b01c8b54SPaul Mackerras cmpwi r10,0; \ 101b01c8b54SPaul Mackerras bne do_kvm_##n 102b01c8b54SPaul Mackerras 103b01c8b54SPaul Mackerras #define __KVM_HANDLER(area, h, n) \ 104b01c8b54SPaul Mackerras do_kvm_##n: \ 105b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 1063c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 107b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 1083c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 109b01c8b54SPaul Mackerras li r12,n; \ 110b01c8b54SPaul Mackerras b kvmppc_interrupt 111b01c8b54SPaul Mackerras 112b01c8b54SPaul Mackerras #define __KVM_HANDLER_SKIP(area, h, n) \ 113b01c8b54SPaul Mackerras do_kvm_##n: \ 114b01c8b54SPaul Mackerras cmpwi r10,KVM_GUEST_MODE_SKIP; \ 115b01c8b54SPaul Mackerras ld r10,area+EX_R10(r13); \ 116b01c8b54SPaul Mackerras beq 89f; \ 1173c42bf8aSPaul Mackerras stw r9,HSTATE_SCRATCH1(r13); \ 118b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 1193c42bf8aSPaul Mackerras std r12,HSTATE_SCRATCH0(r13); \ 120b01c8b54SPaul Mackerras li r12,n; \ 121b01c8b54SPaul Mackerras b kvmppc_interrupt; \ 122b01c8b54SPaul Mackerras 89: mtocrf 0x80,r9; \ 123b01c8b54SPaul Mackerras ld r9,area+EX_R9(r13); \ 124b01c8b54SPaul Mackerras b kvmppc_skip_##h##interrupt 125b01c8b54SPaul Mackerras 126b01c8b54SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 127b01c8b54SPaul Mackerras #define KVMTEST(n) __KVMTEST(n) 128b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 129b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 130b01c8b54SPaul Mackerras 131b01c8b54SPaul Mackerras #else 132b01c8b54SPaul Mackerras #define KVMTEST(n) 133b01c8b54SPaul Mackerras #define KVM_HANDLER(area, h, n) 134b01c8b54SPaul Mackerras #define KVM_HANDLER_SKIP(area, h, n) 135b01c8b54SPaul Mackerras #endif 136b01c8b54SPaul Mackerras 137de56a948SPaul Mackerras #ifdef CONFIG_KVM_BOOK3S_PR 138de56a948SPaul Mackerras #define KVMTEST_PR(n) __KVMTEST(n) 139de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n) 140de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 141de56a948SPaul Mackerras 142de56a948SPaul Mackerras #else 143de56a948SPaul Mackerras #define KVMTEST_PR(n) 144de56a948SPaul Mackerras #define KVM_HANDLER_PR(area, h, n) 145de56a948SPaul Mackerras #define KVM_HANDLER_PR_SKIP(area, h, n) 146de56a948SPaul Mackerras #endif 147de56a948SPaul Mackerras 148b01c8b54SPaul Mackerras #define NOTEST(n) 149b01c8b54SPaul Mackerras 1508aa34ab8SBenjamin Herrenschmidt /* 1518aa34ab8SBenjamin Herrenschmidt * The common exception prolog is used for all except a few exceptions 1528aa34ab8SBenjamin Herrenschmidt * such as a segment miss on a kernel address. We have to be prepared 1538aa34ab8SBenjamin Herrenschmidt * to take another exception from the point where we first touch the 1548aa34ab8SBenjamin Herrenschmidt * kernel stack onwards. 1558aa34ab8SBenjamin Herrenschmidt * 1568aa34ab8SBenjamin Herrenschmidt * On entry r13 points to the paca, r9-r13 are saved in the paca, 1578aa34ab8SBenjamin Herrenschmidt * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 1588aa34ab8SBenjamin Herrenschmidt * SRR1, and relocation is on. 1598aa34ab8SBenjamin Herrenschmidt */ 1608aa34ab8SBenjamin Herrenschmidt #define EXCEPTION_PROLOG_COMMON(n, area) \ 1618aa34ab8SBenjamin Herrenschmidt andi. r10,r12,MSR_PR; /* See if coming from user */ \ 1628aa34ab8SBenjamin Herrenschmidt mr r10,r1; /* Save r1 */ \ 1638aa34ab8SBenjamin Herrenschmidt subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 1648aa34ab8SBenjamin Herrenschmidt beq- 1f; \ 1658aa34ab8SBenjamin Herrenschmidt ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 1668aa34ab8SBenjamin Herrenschmidt 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ 1671977b502SPaul Mackerras blt+ cr1,3f; /* abort if it is */ \ 1681977b502SPaul Mackerras li r1,(n); /* will be reloaded later */ \ 1698aa34ab8SBenjamin Herrenschmidt sth r1,PACA_TRAP_SAVE(r13); \ 1701977b502SPaul Mackerras std r3,area+EX_R3(r13); \ 1711977b502SPaul Mackerras addi r3,r13,area; /* r3 -> where regs are saved*/ \ 1728aa34ab8SBenjamin Herrenschmidt b bad_stack; \ 1738aa34ab8SBenjamin Herrenschmidt 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 1748aa34ab8SBenjamin Herrenschmidt std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 1758aa34ab8SBenjamin Herrenschmidt std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 1768aa34ab8SBenjamin Herrenschmidt std r10,0(r1); /* make stack chain pointer */ \ 1778aa34ab8SBenjamin Herrenschmidt std r0,GPR0(r1); /* save r0 in stackframe */ \ 1788aa34ab8SBenjamin Herrenschmidt std r10,GPR1(r1); /* save r1 in stackframe */ \ 1798aa34ab8SBenjamin Herrenschmidt ACCOUNT_CPU_USER_ENTRY(r9, r10); \ 1808aa34ab8SBenjamin Herrenschmidt std r2,GPR2(r1); /* save r2 in stackframe */ \ 1818aa34ab8SBenjamin Herrenschmidt SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 1828aa34ab8SBenjamin Herrenschmidt SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 1838aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 1848aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R10(r13); \ 1858aa34ab8SBenjamin Herrenschmidt std r9,GPR9(r1); \ 1868aa34ab8SBenjamin Herrenschmidt std r10,GPR10(r1); \ 1878aa34ab8SBenjamin Herrenschmidt ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 1888aa34ab8SBenjamin Herrenschmidt ld r10,area+EX_R12(r13); \ 1898aa34ab8SBenjamin Herrenschmidt ld r11,area+EX_R13(r13); \ 1908aa34ab8SBenjamin Herrenschmidt std r9,GPR11(r1); \ 1918aa34ab8SBenjamin Herrenschmidt std r10,GPR12(r1); \ 1928aa34ab8SBenjamin Herrenschmidt std r11,GPR13(r1); \ 19348404f2eSPaul Mackerras BEGIN_FTR_SECTION_NESTED(66); \ 19448404f2eSPaul Mackerras ld r10,area+EX_CFAR(r13); \ 19548404f2eSPaul Mackerras std r10,ORIG_GPR3(r1); \ 19648404f2eSPaul Mackerras END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 1978aa34ab8SBenjamin Herrenschmidt ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 1988aa34ab8SBenjamin Herrenschmidt mflr r9; /* save LR in stackframe */ \ 1998aa34ab8SBenjamin Herrenschmidt std r9,_LINK(r1); \ 2008aa34ab8SBenjamin Herrenschmidt mfctr r10; /* save CTR in stackframe */ \ 2018aa34ab8SBenjamin Herrenschmidt std r10,_CTR(r1); \ 2028aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 2038aa34ab8SBenjamin Herrenschmidt mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 2048aa34ab8SBenjamin Herrenschmidt std r10,SOFTE(r1); \ 2058aa34ab8SBenjamin Herrenschmidt std r11,_XER(r1); \ 2068aa34ab8SBenjamin Herrenschmidt li r9,(n)+1; \ 2078aa34ab8SBenjamin Herrenschmidt std r9,_TRAP(r1); /* set trap number */ \ 2088aa34ab8SBenjamin Herrenschmidt li r10,0; \ 2098aa34ab8SBenjamin Herrenschmidt ld r11,exception_marker@toc(r2); \ 2108aa34ab8SBenjamin Herrenschmidt std r10,RESULT(r1); /* clear regs->result */ \ 211cf9efce0SPaul Mackerras std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 212cf9efce0SPaul Mackerras ACCOUNT_STOLEN_TIME 2138aa34ab8SBenjamin Herrenschmidt 2148aa34ab8SBenjamin Herrenschmidt /* 2158aa34ab8SBenjamin Herrenschmidt * Exception vectors. 2168aa34ab8SBenjamin Herrenschmidt */ 217b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_PSERIES(loc, vec, label) \ 218b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 2198aa34ab8SBenjamin Herrenschmidt .globl label##_pSeries; \ 2208aa34ab8SBenjamin Herrenschmidt label##_pSeries: \ 2218aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 222673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 223b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 224de56a948SPaul Mackerras EXC_STD, KVMTEST_PR, vec) 2258aa34ab8SBenjamin Herrenschmidt 226b3e6b5dfSBenjamin Herrenschmidt #define STD_EXCEPTION_HV(loc, vec, label) \ 227b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 228b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 229b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 2308aa34ab8SBenjamin Herrenschmidt HMT_MEDIUM; \ 231673b189aSPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 232b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 233b01c8b54SPaul Mackerras EXC_HV, KVMTEST, vec) 2348aa34ab8SBenjamin Herrenschmidt 2357230c564SBenjamin Herrenschmidt /* This associate vector numbers with bits in paca->irq_happened */ 2367230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 2377230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x502 PACA_IRQ_EE 2387230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 2397230c564SBenjamin Herrenschmidt #define SOFTEN_VALUE_0x982 PACA_IRQ_DEC 2407230c564SBenjamin Herrenschmidt 2417230c564SBenjamin Herrenschmidt #define __SOFTEN_TEST(h, vec) \ 2428aa34ab8SBenjamin Herrenschmidt lbz r10,PACASOFTIRQEN(r13); \ 2438aa34ab8SBenjamin Herrenschmidt cmpwi r10,0; \ 2447230c564SBenjamin Herrenschmidt li r10,SOFTEN_VALUE_##vec; \ 245b01c8b54SPaul Mackerras beq masked_##h##interrupt 2467230c564SBenjamin Herrenschmidt #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 247b01c8b54SPaul Mackerras 248de56a948SPaul Mackerras #define SOFTEN_TEST_PR(vec) \ 249de56a948SPaul Mackerras KVMTEST_PR(vec); \ 2507230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 251b01c8b54SPaul Mackerras 252b01c8b54SPaul Mackerras #define SOFTEN_TEST_HV(vec) \ 253b01c8b54SPaul Mackerras KVMTEST(vec); \ 2547230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_HV, vec) 255b01c8b54SPaul Mackerras 2569e368f29SPaul Mackerras #define SOFTEN_TEST_HV_201(vec) \ 2579e368f29SPaul Mackerras KVMTEST(vec); \ 2587230c564SBenjamin Herrenschmidt _SOFTEN_TEST(EXC_STD, vec) 2599e368f29SPaul Mackerras 260b01c8b54SPaul Mackerras #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 261b01c8b54SPaul Mackerras HMT_MEDIUM; \ 262b01c8b54SPaul Mackerras SET_SCRATCH0(r13); /* save r13 */ \ 263b01c8b54SPaul Mackerras __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 264b01c8b54SPaul Mackerras EXCEPTION_PROLOG_PSERIES_1(label##_common, h); 265b01c8b54SPaul Mackerras #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 266b01c8b54SPaul Mackerras __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 267b3e6b5dfSBenjamin Herrenschmidt 268b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 269b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 270b3e6b5dfSBenjamin Herrenschmidt .globl label##_pSeries; \ 271b3e6b5dfSBenjamin Herrenschmidt label##_pSeries: \ 272b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 273de56a948SPaul Mackerras EXC_STD, SOFTEN_TEST_PR) 274b3e6b5dfSBenjamin Herrenschmidt 275b3e6b5dfSBenjamin Herrenschmidt #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 276b3e6b5dfSBenjamin Herrenschmidt . = loc; \ 277b3e6b5dfSBenjamin Herrenschmidt .globl label##_hv; \ 278b3e6b5dfSBenjamin Herrenschmidt label##_hv: \ 279b01c8b54SPaul Mackerras _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 280b01c8b54SPaul Mackerras EXC_HV, SOFTEN_TEST_HV) 2818aa34ab8SBenjamin Herrenschmidt 2821b701179SBenjamin Herrenschmidt /* 2831b701179SBenjamin Herrenschmidt * Our exception common code can be passed various "additions" 2841b701179SBenjamin Herrenschmidt * to specify the behaviour of interrupts, whether to kick the 2851b701179SBenjamin Herrenschmidt * runlatch, etc... 2861b701179SBenjamin Herrenschmidt */ 2871b701179SBenjamin Herrenschmidt 2881b701179SBenjamin Herrenschmidt /* Exception addition: Hard disable interrupts */ 2897230c564SBenjamin Herrenschmidt #define DISABLE_INTS SOFT_DISABLE_INTS(r10,r11) 2908aa34ab8SBenjamin Herrenschmidt 2911b701179SBenjamin Herrenschmidt /* Exception addition: Keep interrupt state */ 2928aa34ab8SBenjamin Herrenschmidt #define ENABLE_INTS \ 293d9ada91aSBenjamin Herrenschmidt ld r11,PACAKMSR(r13); \ 2941b701179SBenjamin Herrenschmidt ld r12,_MSR(r1); \ 2958aa34ab8SBenjamin Herrenschmidt rlwimi r11,r12,0,MSR_EE; \ 2968aa34ab8SBenjamin Herrenschmidt mtmsrd r11,1 2978aa34ab8SBenjamin Herrenschmidt 298fe1952fcSBenjamin Herrenschmidt #define ADD_NVGPRS \ 299fe1952fcSBenjamin Herrenschmidt bl .save_nvgprs 300fe1952fcSBenjamin Herrenschmidt 301fe1952fcSBenjamin Herrenschmidt #define RUNLATCH_ON \ 302fe1952fcSBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 303fe1952fcSBenjamin Herrenschmidt clrrdi r3,r1,THREAD_SHIFT; \ 304fe1952fcSBenjamin Herrenschmidt ld r4,TI_LOCAL_FLAGS(r3); \ 305fe1952fcSBenjamin Herrenschmidt andi. r0,r4,_TLF_RUNLATCH; \ 306fe1952fcSBenjamin Herrenschmidt beql ppc64_runlatch_on_trampoline; \ 307fe1952fcSBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 308fe1952fcSBenjamin Herrenschmidt 309fe1952fcSBenjamin Herrenschmidt #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 3108aa34ab8SBenjamin Herrenschmidt .align 7; \ 3118aa34ab8SBenjamin Herrenschmidt .globl label##_common; \ 3128aa34ab8SBenjamin Herrenschmidt label##_common: \ 3138aa34ab8SBenjamin Herrenschmidt EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 314fe1952fcSBenjamin Herrenschmidt additions; \ 3158aa34ab8SBenjamin Herrenschmidt addi r3,r1,STACK_FRAME_OVERHEAD; \ 3168aa34ab8SBenjamin Herrenschmidt bl hdlr; \ 317fe1952fcSBenjamin Herrenschmidt b ret 318fe1952fcSBenjamin Herrenschmidt 319fe1952fcSBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 320fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 321fe1952fcSBenjamin Herrenschmidt ADD_NVGPRS;DISABLE_INTS) 3228aa34ab8SBenjamin Herrenschmidt 3238aa34ab8SBenjamin Herrenschmidt /* 3248aa34ab8SBenjamin Herrenschmidt * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 3257450f6f0SBenjamin Herrenschmidt * in the idle task and therefore need the special idle handling 3267450f6f0SBenjamin Herrenschmidt * (finish nap and runlatch) 3278aa34ab8SBenjamin Herrenschmidt */ 3287450f6f0SBenjamin Herrenschmidt #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 329fe1952fcSBenjamin Herrenschmidt EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 330fe1952fcSBenjamin Herrenschmidt FINISH_NAP;RUNLATCH_ON;DISABLE_INTS) 3318aa34ab8SBenjamin Herrenschmidt 3328aa34ab8SBenjamin Herrenschmidt /* 3338aa34ab8SBenjamin Herrenschmidt * When the idle code in power4_idle puts the CPU into NAP mode, 3348aa34ab8SBenjamin Herrenschmidt * it has to do so in a loop, and relies on the external interrupt 3358aa34ab8SBenjamin Herrenschmidt * and decrementer interrupt entry code to get it out of the loop. 3368aa34ab8SBenjamin Herrenschmidt * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 3378aa34ab8SBenjamin Herrenschmidt * to signal that it is in the loop and needs help to get out. 3388aa34ab8SBenjamin Herrenschmidt */ 3398aa34ab8SBenjamin Herrenschmidt #ifdef CONFIG_PPC_970_NAP 3408aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP \ 3418aa34ab8SBenjamin Herrenschmidt BEGIN_FTR_SECTION \ 3428aa34ab8SBenjamin Herrenschmidt clrrdi r11,r1,THREAD_SHIFT; \ 3438aa34ab8SBenjamin Herrenschmidt ld r9,TI_LOCAL_FLAGS(r11); \ 3448aa34ab8SBenjamin Herrenschmidt andi. r10,r9,_TLF_NAPPING; \ 3458aa34ab8SBenjamin Herrenschmidt bnel power4_fixup_nap; \ 3468aa34ab8SBenjamin Herrenschmidt END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 3478aa34ab8SBenjamin Herrenschmidt #else 3488aa34ab8SBenjamin Herrenschmidt #define FINISH_NAP 3498aa34ab8SBenjamin Herrenschmidt #endif 3508aa34ab8SBenjamin Herrenschmidt 3518aa34ab8SBenjamin Herrenschmidt #endif /* _ASM_POWERPC_EXCEPTION_H */ 352