From dce6670aaa7efece0558010b48d5ef9d421154be Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 23 Jul 2009 23:15:42 +0000 Subject: [PATCH] powerpc: Add PACA fields specific to 64-bit Book3E processors This adds various fields in the PACA that are for use specifically by Book3E processors, such as exception save areas, current pgd pointer, special exceptions kernel stacks etc... Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/paca.h | 23 ++++++++++++++++++++--- arch/powerpc/kernel/asm-offsets.c | 14 ++++++++++++++ arch/powerpc/kernel/paca.c | 3 +++ 3 files changed, 37 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index c8a3cbf..b634456 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -14,9 +14,11 @@ #define _ASM_POWERPC_PACA_H #ifdef __KERNEL__ -#include -#include -#include +#include +#include +#include +#include +#include register struct paca_struct *local_paca asm("r13"); @@ -91,6 +93,21 @@ struct paca_struct { u16 slb_cache[SLB_CACHE_ENTRIES]; #endif /* CONFIG_PPC_STD_MMU_64 */ +#ifdef CONFIG_PPC_BOOK3E + pgd_t *pgd; /* Current PGD */ + pgd_t *kernel_pgd; /* Kernel PGD */ + u64 exgen[8] __attribute__((aligned(0x80))); + u64 extlb[EX_TLB_SIZE*3] __attribute__((aligned(0x80))); + u64 exmc[8]; /* used for machine checks */ + u64 excrit[8]; /* used for crit interrupts */ + u64 exdbg[8]; /* used for debug interrupts */ + + /* Kernel stack pointers for use by special exceptions */ + void *mc_kstack; + void *crit_kstack; + void *dbg_kstack; +#endif /* CONFIG_PPC_BOOK3E */ + mm_context_t context; /* diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 0a9f30b..b9e010d 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -140,6 +140,20 @@ int main(void) context.high_slices_psize)); DEFINE(MMUPSIZEDEFSIZE, sizeof(struct mmu_psize_def)); #endif /* CONFIG_PPC_MM_SLICES */ + +#ifdef CONFIG_PPC_BOOK3E + DEFINE(PACAPGD, offsetof(struct paca_struct, pgd)); + DEFINE(PACA_KERNELPGD, offsetof(struct paca_struct, kernel_pgd)); + DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen)); + DEFINE(PACA_EXTLB, offsetof(struct paca_struct, extlb)); + DEFINE(PACA_EXMC, offsetof(struct paca_struct, exmc)); + DEFINE(PACA_EXCRIT, offsetof(struct paca_struct, excrit)); + DEFINE(PACA_EXDBG, offsetof(struct paca_struct, exdbg)); + DEFINE(PACA_MC_STACK, offsetof(struct paca_struct, mc_kstack)); + DEFINE(PACA_CRIT_STACK, offsetof(struct paca_struct, crit_kstack)); + DEFINE(PACA_DBG_STACK, offsetof(struct paca_struct, dbg_kstack)); +#endif /* CONFIG_PPC_BOOK3E */ + #ifdef CONFIG_PPC_STD_MMU_64 DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real)); DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr)); diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index e9962c7..d16b1ea 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -13,6 +13,7 @@ #include #include #include +#include /* This symbol is provided by the linker - let it fill in the paca * field correctly */ @@ -87,6 +88,8 @@ void __init initialise_pacas(void) #ifdef CONFIG_PPC_BOOK3S new_paca->lppaca_ptr = &lppaca[cpu]; +#else + new_paca->kernel_pgd = swapper_pg_dir; #endif new_paca->lock_token = 0x8000; new_paca->paca_index = cpu; -- 2.7.4