551 lines
18 KiB
C
551 lines
18 KiB
C
#ifndef _ASM_POWERPC_EXCEPTION_H
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#define _ASM_POWERPC_EXCEPTION_H
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/*
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* Extracted from head_64.S
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*
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* PowerPC version
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
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* Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
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* Adapted for Power Macintosh by Paul Mackerras.
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* Low-level exception handlers and MMU support
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* rewritten by Paul Mackerras.
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* Copyright (C) 1996 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and
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* Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com
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*
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* This file contains the low-level support and setup for the
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* PowerPC-64 platform, including trap and interrupt dispatch.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* The following macros define the code that appears as
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* the prologue to each of the exception handlers. They
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* are split into two parts to allow a single kernel binary
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* to be used for pSeries and iSeries.
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*
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* We make as much of the exception code common between native
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* exception handlers (including pSeries LPAR) and iSeries LPAR
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* implementations as possible.
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*/
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#define EX_R9 0
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#define EX_R10 8
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#define EX_R11 16
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#define EX_R12 24
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#define EX_R13 32
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#define EX_SRR0 40
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#define EX_DAR 48
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#define EX_DSISR 56
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#define EX_CCR 60
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#define EX_R3 64
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#define EX_LR 72
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#define EX_CFAR 80
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#define EX_PPR 88 /* SMT thread status register (priority) */
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#define EX_CTR 96
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#ifdef CONFIG_RELOCATABLE
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#define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
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ld r12,PACAKBASE(r13); /* get high part of &label */ \
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mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
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LOAD_HANDLER(r12,label); \
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mtctr r12; \
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mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
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li r10,MSR_RI; \
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mtmsrd r10,1; /* Set RI (EE=0) */ \
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bctr;
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#else
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/* If not relocatable, we can jump directly -- and save messing with LR */
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#define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
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mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
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mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
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li r10,MSR_RI; \
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mtmsrd r10,1; /* Set RI (EE=0) */ \
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b label;
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#endif
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#define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
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__EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \
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/*
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* As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on
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* so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which
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* case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr.
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*/
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#define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \
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EXCEPTION_PROLOG_0(area); \
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EXCEPTION_PROLOG_1(area, extra, vec); \
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EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)
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/*
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* We're short on space and time in the exception prolog, so we can't
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* use the normal SET_REG_IMMEDIATE macro. Normally we just need the
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* low halfword of the address, but for Kdump we need the whole low
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* word.
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*/
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#define LOAD_HANDLER(reg, label) \
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/* Handlers must be within 64K of kbase, which must be 64k aligned */ \
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ori reg,reg,(label)-_stext; /* virt addr of handler ... */
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/* Exception register prefixes */
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#define EXC_HV H
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#define EXC_STD
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#if defined(CONFIG_RELOCATABLE)
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/*
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* If we support interrupts with relocation on AND we're a relocatable kernel,
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* we need to use CTR to get to the 2nd level handler. So, save/restore it
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* when required.
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*/
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#define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13)
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#define GET_CTR(reg, area) ld reg,area+EX_CTR(r13)
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#define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg
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#else
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/* ...else CTR is unused and in register. */
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#define SAVE_CTR(reg, area)
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#define GET_CTR(reg, area) mfctr reg
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#define RESTORE_CTR(reg, area)
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#endif
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/*
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* PPR save/restore macros used in exceptions_64s.S
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* Used for P7 or later processors
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*/
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#define SAVE_PPR(area, ra, rb) \
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BEGIN_FTR_SECTION_NESTED(940) \
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ld ra,PACACURRENT(r13); \
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ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \
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std rb,TASKTHREADPPR(ra); \
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END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
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#define RESTORE_PPR_PACA(area, ra) \
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BEGIN_FTR_SECTION_NESTED(941) \
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ld ra,area+EX_PPR(r13); \
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mtspr SPRN_PPR,ra; \
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END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
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/*
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* Get an SPR into a register if the CPU has the given feature
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*/
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#define OPT_GET_SPR(ra, spr, ftr) \
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BEGIN_FTR_SECTION_NESTED(943) \
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mfspr ra,spr; \
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END_FTR_SECTION_NESTED(ftr,ftr,943)
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/*
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* Set an SPR from a register if the CPU has the given feature
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*/
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#define OPT_SET_SPR(ra, spr, ftr) \
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BEGIN_FTR_SECTION_NESTED(943) \
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mtspr spr,ra; \
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END_FTR_SECTION_NESTED(ftr,ftr,943)
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/*
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* Save a register to the PACA if the CPU has the given feature
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*/
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#define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \
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BEGIN_FTR_SECTION_NESTED(943) \
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std ra,offset(r13); \
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END_FTR_SECTION_NESTED(ftr,ftr,943)
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#define EXCEPTION_PROLOG_0(area) \
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GET_PACA(r13); \
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std r9,area+EX_R9(r13); /* save r9 */ \
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OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \
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HMT_MEDIUM; \
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std r10,area+EX_R10(r13); /* save r10 - r12 */ \
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OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR)
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#define __EXCEPTION_PROLOG_1(area, extra, vec) \
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OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \
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OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \
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SAVE_CTR(r10, area); \
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mfcr r9; \
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extra(vec); \
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std r11,area+EX_R11(r13); \
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std r12,area+EX_R12(r13); \
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GET_SCRATCH0(r10); \
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std r10,area+EX_R13(r13)
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#define EXCEPTION_PROLOG_1(area, extra, vec) \
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__EXCEPTION_PROLOG_1(area, extra, vec)
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#define __EXCEPTION_PROLOG_PSERIES_1(label, h) \
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ld r12,PACAKBASE(r13); /* get high part of &label */ \
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ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \
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mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
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LOAD_HANDLER(r12,label) \
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mtspr SPRN_##h##SRR0,r12; \
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mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
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mtspr SPRN_##h##SRR1,r10; \
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h##rfid; \
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b . /* prevent speculative execution */
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#define EXCEPTION_PROLOG_PSERIES_1(label, h) \
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__EXCEPTION_PROLOG_PSERIES_1(label, h)
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#define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \
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EXCEPTION_PROLOG_0(area); \
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EXCEPTION_PROLOG_1(area, extra, vec); \
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EXCEPTION_PROLOG_PSERIES_1(label, h);
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#define __KVMTEST(n) \
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lbz r10,HSTATE_IN_GUEST(r13); \
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cmpwi r10,0; \
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bne do_kvm_##n
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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/*
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* If hv is possible, interrupts come into to the hv version
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* of the kvmppc_interrupt code, which then jumps to the PR handler,
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* kvmppc_interrupt_pr, if the guest is a PR guest.
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*/
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#define kvmppc_interrupt kvmppc_interrupt_hv
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#else
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#define kvmppc_interrupt kvmppc_interrupt_pr
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#endif
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#define __KVM_HANDLER(area, h, n) \
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do_kvm_##n: \
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BEGIN_FTR_SECTION_NESTED(947) \
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ld r10,area+EX_CFAR(r13); \
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std r10,HSTATE_CFAR(r13); \
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END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \
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BEGIN_FTR_SECTION_NESTED(948) \
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ld r10,area+EX_PPR(r13); \
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std r10,HSTATE_PPR(r13); \
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END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \
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ld r10,area+EX_R10(r13); \
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stw r9,HSTATE_SCRATCH1(r13); \
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ld r9,area+EX_R9(r13); \
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std r12,HSTATE_SCRATCH0(r13); \
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li r12,n; \
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b kvmppc_interrupt
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#define __KVM_HANDLER_SKIP(area, h, n) \
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do_kvm_##n: \
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cmpwi r10,KVM_GUEST_MODE_SKIP; \
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ld r10,area+EX_R10(r13); \
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beq 89f; \
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stw r9,HSTATE_SCRATCH1(r13); \
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BEGIN_FTR_SECTION_NESTED(948) \
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ld r9,area+EX_PPR(r13); \
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std r9,HSTATE_PPR(r13); \
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END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \
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ld r9,area+EX_R9(r13); \
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std r12,HSTATE_SCRATCH0(r13); \
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li r12,n; \
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b kvmppc_interrupt; \
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89: mtocrf 0x80,r9; \
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ld r9,area+EX_R9(r13); \
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b kvmppc_skip_##h##interrupt
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#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
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#define KVMTEST(n) __KVMTEST(n)
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#define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n)
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#define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
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#else
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#define KVMTEST(n)
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#define KVM_HANDLER(area, h, n)
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#define KVM_HANDLER_SKIP(area, h, n)
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#endif
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#define NOTEST(n)
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/*
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* The common exception prolog is used for all except a few exceptions
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* such as a segment miss on a kernel address. We have to be prepared
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* to take another exception from the point where we first touch the
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* kernel stack onwards.
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*
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* On entry r13 points to the paca, r9-r13 are saved in the paca,
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* r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
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* SRR1, and relocation is on.
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*/
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#define EXCEPTION_PROLOG_COMMON(n, area) \
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andi. r10,r12,MSR_PR; /* See if coming from user */ \
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mr r10,r1; /* Save r1 */ \
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subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \
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beq- 1f; \
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ld r1,PACAKSAVE(r13); /* kernel stack to use */ \
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1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \
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blt+ cr1,3f; /* abort if it is */ \
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li r1,(n); /* will be reloaded later */ \
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sth r1,PACA_TRAP_SAVE(r13); \
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std r3,area+EX_R3(r13); \
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addi r3,r13,area; /* r3 -> where regs are saved*/ \
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RESTORE_CTR(r1, area); \
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b bad_stack; \
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3: std r9,_CCR(r1); /* save CR in stackframe */ \
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std r11,_NIP(r1); /* save SRR0 in stackframe */ \
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std r12,_MSR(r1); /* save SRR1 in stackframe */ \
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std r10,0(r1); /* make stack chain pointer */ \
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std r0,GPR0(r1); /* save r0 in stackframe */ \
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std r10,GPR1(r1); /* save r1 in stackframe */ \
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beq 4f; /* if from kernel mode */ \
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ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \
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SAVE_PPR(area, r9, r10); \
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4: EXCEPTION_PROLOG_COMMON_2(area) \
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EXCEPTION_PROLOG_COMMON_3(n) \
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ACCOUNT_STOLEN_TIME
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/* Save original regs values from save area to stack frame. */
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#define EXCEPTION_PROLOG_COMMON_2(area) \
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ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \
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ld r10,area+EX_R10(r13); \
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std r9,GPR9(r1); \
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std r10,GPR10(r1); \
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ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \
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ld r10,area+EX_R12(r13); \
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ld r11,area+EX_R13(r13); \
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std r9,GPR11(r1); \
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std r10,GPR12(r1); \
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std r11,GPR13(r1); \
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BEGIN_FTR_SECTION_NESTED(66); \
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ld r10,area+EX_CFAR(r13); \
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std r10,ORIG_GPR3(r1); \
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END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
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GET_CTR(r10, area); \
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std r10,_CTR(r1);
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#define EXCEPTION_PROLOG_COMMON_3(n) \
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std r2,GPR2(r1); /* save r2 in stackframe */ \
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SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \
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SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \
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mflr r9; /* Get LR, later save to stack */ \
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ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \
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std r9,_LINK(r1); \
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lbz r10,PACASOFTIRQEN(r13); \
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mfspr r11,SPRN_XER; /* save XER in stackframe */ \
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std r10,SOFTE(r1); \
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std r11,_XER(r1); \
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li r9,(n)+1; \
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std r9,_TRAP(r1); /* set trap number */ \
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li r10,0; \
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ld r11,exception_marker@toc(r2); \
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std r10,RESULT(r1); /* clear regs->result */ \
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std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */
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/*
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* Exception vectors.
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*/
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#define STD_EXCEPTION_PSERIES(vec, label) \
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. = vec; \
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.globl label##_pSeries; \
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label##_pSeries: \
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
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EXC_STD, KVMTEST, vec)
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/* Version of above for when we have to branch out-of-line */
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#define STD_EXCEPTION_PSERIES_OOL(vec, label) \
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.globl label##_pSeries; \
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label##_pSeries: \
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EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \
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EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD)
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#define STD_EXCEPTION_HV(loc, vec, label) \
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. = loc; \
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.globl label##_hv; \
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label##_hv: \
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
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EXC_HV, KVMTEST, vec)
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/* Version of above for when we have to branch out-of-line */
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#define STD_EXCEPTION_HV_OOL(vec, label) \
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.globl label##_hv; \
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label##_hv: \
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EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \
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EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV)
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#define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \
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. = loc; \
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.globl label##_relon_pSeries; \
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label##_relon_pSeries: \
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/* No guest interrupts come through here */ \
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
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EXC_STD, NOTEST, vec)
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#define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \
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.globl label##_relon_pSeries; \
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label##_relon_pSeries: \
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EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \
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EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD)
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#define STD_RELON_EXCEPTION_HV(loc, vec, label) \
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. = loc; \
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.globl label##_relon_hv; \
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label##_relon_hv: \
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/* No guest interrupts come through here */ \
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
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EXC_HV, NOTEST, vec)
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#define STD_RELON_EXCEPTION_HV_OOL(vec, label) \
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.globl label##_relon_hv; \
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label##_relon_hv: \
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EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \
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EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV)
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/* This associate vector numbers with bits in paca->irq_happened */
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#define SOFTEN_VALUE_0x500 PACA_IRQ_EE
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#define SOFTEN_VALUE_0x502 PACA_IRQ_EE
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#define SOFTEN_VALUE_0x900 PACA_IRQ_DEC
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#define SOFTEN_VALUE_0x982 PACA_IRQ_DEC
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#define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL
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#define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL
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#define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL
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#define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI
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#define SOFTEN_VALUE_0xe62 PACA_IRQ_HMI
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#define SOFTEN_VALUE_0xea0 PACA_IRQ_EE
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#define SOFTEN_VALUE_0xea2 PACA_IRQ_EE
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#define __SOFTEN_TEST(h, vec) \
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lbz r10,PACASOFTIRQEN(r13); \
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cmpwi r10,0; \
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li r10,SOFTEN_VALUE_##vec; \
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|
beq masked_##h##interrupt
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#define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec)
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|
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|
#define SOFTEN_TEST_PR(vec) \
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KVMTEST(vec); \
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|
_SOFTEN_TEST(EXC_STD, vec)
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|
|
|
#define SOFTEN_TEST_HV(vec) \
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|
KVMTEST(vec); \
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|
_SOFTEN_TEST(EXC_HV, vec)
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|
|
|
#define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec)
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|
#define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec)
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|
|
|
#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
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SET_SCRATCH0(r13); /* save r13 */ \
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|
EXCEPTION_PROLOG_0(PACA_EXGEN); \
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|
__EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \
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|
EXCEPTION_PROLOG_PSERIES_1(label##_common, h);
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|
|
|
#define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
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|
__MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
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|
|
|
#define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \
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|
. = loc; \
|
|
.globl label##_pSeries; \
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|
label##_pSeries: \
|
|
_MASKABLE_EXCEPTION_PSERIES(vec, label, \
|
|
EXC_STD, SOFTEN_TEST_PR)
|
|
|
|
#define MASKABLE_EXCEPTION_HV(loc, vec, label) \
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|
. = loc; \
|
|
.globl label##_hv; \
|
|
label##_hv: \
|
|
_MASKABLE_EXCEPTION_PSERIES(vec, label, \
|
|
EXC_HV, SOFTEN_TEST_HV)
|
|
|
|
#define MASKABLE_EXCEPTION_HV_OOL(vec, label) \
|
|
.globl label##_hv; \
|
|
label##_hv: \
|
|
EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \
|
|
EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV);
|
|
|
|
#define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \
|
|
SET_SCRATCH0(r13); /* save r13 */ \
|
|
EXCEPTION_PROLOG_0(PACA_EXGEN); \
|
|
__EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \
|
|
EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h);
|
|
#define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \
|
|
__MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)
|
|
|
|
#define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \
|
|
. = loc; \
|
|
.globl label##_relon_pSeries; \
|
|
label##_relon_pSeries: \
|
|
_MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \
|
|
EXC_STD, SOFTEN_NOTEST_PR)
|
|
|
|
#define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \
|
|
. = loc; \
|
|
.globl label##_relon_hv; \
|
|
label##_relon_hv: \
|
|
_MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \
|
|
EXC_HV, SOFTEN_NOTEST_HV)
|
|
|
|
#define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \
|
|
.globl label##_relon_hv; \
|
|
label##_relon_hv: \
|
|
EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \
|
|
EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV);
|
|
|
|
/*
|
|
* Our exception common code can be passed various "additions"
|
|
* to specify the behaviour of interrupts, whether to kick the
|
|
* runlatch, etc...
|
|
*/
|
|
|
|
/*
|
|
* This addition reconciles our actual IRQ state with the various software
|
|
* flags that track it. This may call C code.
|
|
*/
|
|
#define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11)
|
|
|
|
#define ADD_NVGPRS \
|
|
bl save_nvgprs
|
|
|
|
#define RUNLATCH_ON \
|
|
BEGIN_FTR_SECTION \
|
|
CURRENT_THREAD_INFO(r3, r1); \
|
|
ld r4,TI_LOCAL_FLAGS(r3); \
|
|
andi. r0,r4,_TLF_RUNLATCH; \
|
|
beql ppc64_runlatch_on_trampoline; \
|
|
END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
|
|
|
|
#define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \
|
|
.align 7; \
|
|
.globl label##_common; \
|
|
label##_common: \
|
|
EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \
|
|
/* Volatile regs are potentially clobbered here */ \
|
|
additions; \
|
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
bl hdlr; \
|
|
b ret
|
|
|
|
#define STD_EXCEPTION_COMMON(trap, label, hdlr) \
|
|
EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \
|
|
ADD_NVGPRS;ADD_RECONCILE)
|
|
|
|
/*
|
|
* Like STD_EXCEPTION_COMMON, but for exceptions that can occur
|
|
* in the idle task and therefore need the special idle handling
|
|
* (finish nap and runlatch)
|
|
*/
|
|
#define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \
|
|
EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
|
|
FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
|
|
|
|
/*
|
|
* When the idle code in power4_idle puts the CPU into NAP mode,
|
|
* it has to do so in a loop, and relies on the external interrupt
|
|
* and decrementer interrupt entry code to get it out of the loop.
|
|
* It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
|
|
* to signal that it is in the loop and needs help to get out.
|
|
*/
|
|
#ifdef CONFIG_PPC_970_NAP
|
|
#define FINISH_NAP \
|
|
BEGIN_FTR_SECTION \
|
|
CURRENT_THREAD_INFO(r11, r1); \
|
|
ld r9,TI_LOCAL_FLAGS(r11); \
|
|
andi. r10,r9,_TLF_NAPPING; \
|
|
bnel power4_fixup_nap; \
|
|
END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
|
|
#else
|
|
#define FINISH_NAP
|
|
#endif
|
|
|
|
#endif /* _ASM_POWERPC_EXCEPTION_H */
|