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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-07-23 23:15:42 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-08-20 10:25:08 +1000
commitdce6670aaa7efece0558010b48d5ef9d421154be (patch)
treeac14f2b583d8914c1a0e03637949ab7a1c307ec5
parent13363ab9b9d040ebeace3a1a3a5ddcb13bf0d644 (diff)
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 <benh@kernel.crashing.org>
-rw-r--r--arch/powerpc/include/asm/paca.h23
-rw-r--r--arch/powerpc/kernel/asm-offsets.c14
-rw-r--r--arch/powerpc/kernel/paca.c3
3 files changed, 37 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index c8a3cbfe02f..b634456ea89 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 <asm/types.h>
-#include <asm/lppaca.h>
-#include <asm/mmu.h>
+#include <asm/types.h>
+#include <asm/lppaca.h>
+#include <asm/mmu.h>
+#include <asm/page.h>
+#include <asm/exception-64e.h>
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 0a9f30b5495..b9e010d0fc9 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 e9962c7f8a0..d16b1ea55d4 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -13,6 +13,7 @@
#include <asm/lppaca.h>
#include <asm/paca.h>
#include <asm/sections.h>
+#include <asm/pgtable.h>
/* 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;