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powerpc: Add PACA fields specific to 64-bit Book3E processors

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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>
This commit is contained in:
Benjamin Herrenschmidt
2009-07-23 23:15:42 +00:00
parent 13363ab9b9
commit dce6670aaa
3 changed files with 37 additions and 3 deletions
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14
arch/powerpc/kernel/asm-offsets.c
View File

@@ -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));

3
arch/powerpc/kernel/paca.c
View File

@@ -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;