diff options
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/exception.h | 42 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/paca.h | 2 |
2 files changed, 7 insertions, 37 deletions
diff --git a/arch/powerpc/include/asm/exception.h b/arch/powerpc/include/asm/exception.h index 329148b5acc..d3d4534e3c7 100644 --- a/arch/powerpc/include/asm/exception.h +++ b/arch/powerpc/include/asm/exception.h @@ -53,14 +53,8 @@ * low halfword of the address, but for Kdump we need the whole low * word. */ -#ifdef CONFIG_CRASH_DUMP #define LOAD_HANDLER(reg, label) \ - oris reg,reg,(label)@h; /* virt addr of handler ... */ \ - ori reg,reg,(label)@l; /* .. and the rest */ -#else -#define LOAD_HANDLER(reg, label) \ - ori reg,reg,(label)@l; /* virt addr of handler ... */ -#endif + addi reg,reg,(label)-_stext; /* virt addr of handler ... */ #define EXCEPTION_PROLOG_1(area) \ mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \ @@ -72,37 +66,12 @@ std r9,area+EX_R13(r13); \ mfcr r9 -/* - * Equal to EXCEPTION_PROLOG_PSERIES, except that it forces 64bit mode. - * The firmware calls the registered system_reset_fwnmi and - * machine_check_fwnmi handlers in 32bit mode if the cpu happens to run - * a 32bit application at the time of the event. - * This firmware bug is present on POWER4 and JS20. - */ -#define EXCEPTION_PROLOG_PSERIES_FORCE_64BIT(area, label) \ - EXCEPTION_PROLOG_1(area); \ - clrrdi r12,r13,32; /* get high part of &label */ \ - mfmsr r10; \ - /* force 64bit mode */ \ - li r11,5; /* MSR_SF_LG|MSR_ISF_LG */ \ - rldimi r10,r11,61,0; /* insert into top 3 bits */ \ - /* done 64bit mode */ \ - mfspr r11,SPRN_SRR0; /* save SRR0 */ \ - LOAD_HANDLER(r12,label) \ - ori r10,r10,MSR_IR|MSR_DR|MSR_RI; \ - mtspr SPRN_SRR0,r12; \ - mfspr r12,SPRN_SRR1; /* and SRR1 */ \ - mtspr SPRN_SRR1,r10; \ - rfid; \ - b . /* prevent speculative execution */ - #define EXCEPTION_PROLOG_PSERIES(area, label) \ EXCEPTION_PROLOG_1(area); \ - clrrdi r12,r13,32; /* get high part of &label */ \ - mfmsr r10; \ + ld r12,PACAKBASE(r13); /* get high part of &label */ \ + ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ mfspr r11,SPRN_SRR0; /* save SRR0 */ \ LOAD_HANDLER(r12,label) \ - ori r10,r10,MSR_IR|MSR_DR|MSR_RI; \ mtspr SPRN_SRR0,r12; \ mfspr r12,SPRN_SRR1; /* and SRR1 */ \ mtspr SPRN_SRR1,r10; \ @@ -210,11 +179,10 @@ label##_pSeries: \ std r10,PACA_EXGEN+EX_R13(r13); \ std r11,PACA_EXGEN+EX_R11(r13); \ std r12,PACA_EXGEN+EX_R12(r13); \ - clrrdi r12,r13,32; /* get high part of &label */ \ - mfmsr r10; \ + ld r12,PACAKBASE(r13); /* get high part of &label */ \ + ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ mfspr r11,SPRN_SRR0; /* save SRR0 */ \ LOAD_HANDLER(r12,label##_common) \ - ori r10,r10,MSR_IR|MSR_DR|MSR_RI; \ mtspr SPRN_SRR0,r12; \ mfspr r12,SPRN_SRR1; /* and SRR1 */ \ mtspr SPRN_SRR1,r10; \ diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 6493a395508..082b3aedf14 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -62,6 +62,8 @@ struct paca_struct { u16 paca_index; /* Logical processor number */ u64 kernel_toc; /* Kernel TOC address */ + u64 kernelbase; /* Base address of kernel */ + u64 kernel_msr; /* MSR while running in kernel */ u64 stab_real; /* Absolute address of segment table */ u64 stab_addr; /* Virtual address of segment table */ void *emergency_sp; /* pointer to emergency stack */ |