We would want to use number of page table level to define mm_struct. Let's expose it as CONFIG_PGTABLE_LEVELS.
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Helge Deller <[email protected]> --- arch/parisc/Kconfig | 5 +++++ arch/parisc/include/asm/pgalloc.h | 2 +- arch/parisc/include/asm/pgtable.h | 17 ++++++++--------- arch/parisc/kernel/entry.S | 4 ++-- arch/parisc/kernel/head.S | 4 ++-- arch/parisc/mm/init.c | 2 +- 6 files changed, 19 insertions(+), 15 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 1554a6f2a5bb..1899d65b283c 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -103,6 +103,11 @@ config ARCH_MAY_HAVE_PC_FDC depends on BROKEN default y +config PGTABLE_LEVELS + int + default 3 if 64BIT && PARISC_PAGE_SIZE_4KB + default 2 + source "init/Kconfig" source "kernel/Kconfig.freezer" diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index f213f5b4c423..55ad8be9b7f3 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -51,7 +51,7 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) free_pages((unsigned long)pgd, PGD_ALLOC_ORDER); } -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 /* Three Level Page Table Support for pmd's */ diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 8c966b2270aa..0a183756d6ec 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -68,13 +68,11 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long); #define KERNEL_INITIAL_ORDER 24 /* 0 to 1<<24 = 16MB */ #define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER) -#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) -#define PT_NLEVELS 3 +#if CONFIG_PGTABLE_LEVELS == 3 #define PGD_ORDER 1 /* Number of pages per pgd */ #define PMD_ORDER 1 /* Number of pages per pmd */ #define PGD_ALLOC_ORDER 2 /* first pgd contains pmd */ #else -#define PT_NLEVELS 2 #define PGD_ORDER 1 /* Number of pages per pgd */ #define PGD_ALLOC_ORDER PGD_ORDER #endif @@ -93,9 +91,10 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long); #define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE) #define PMD_SIZE (1UL << PMD_SHIFT) #define PMD_MASK (~(PMD_SIZE-1)) -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 #define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY) #else +#define __PAGETABLE_PMD_FOLDED #define BITS_PER_PMD 0 #endif #define PTRS_PER_PMD (1UL << BITS_PER_PMD) @@ -276,7 +275,7 @@ extern unsigned long *empty_zero_page; #define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK) #define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 /* The first entry of the permanent pmd is not there if it contains * the gateway marker */ #define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED) @@ -286,7 +285,7 @@ extern unsigned long *empty_zero_page; #define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID)) #define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT) static inline void pmd_clear(pmd_t *pmd) { -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED) /* This is the entry pointing to the permanent pmd * attached to the pgd; cannot clear it */ @@ -298,7 +297,7 @@ static inline void pmd_clear(pmd_t *pmd) { -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 #define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd))) #define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd)) @@ -308,7 +307,7 @@ static inline void pmd_clear(pmd_t *pmd) { #define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID)) #define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT) static inline void pgd_clear(pgd_t *pgd) { -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED) /* This is the permanent pmd attached to the pgd; cannot * free it */ @@ -392,7 +391,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) /* Find an entry in the second-level page table.. */ -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 #define pmd_offset(dir,address) \ ((pmd_t *) pgd_page_vaddr(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1))) #else diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index e8f07dd28401..2cd5fb8798a8 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -398,7 +398,7 @@ * can address up to 1TB */ .macro L2_ptep pmd,pte,index,va,fault -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 extru \va,31-ASM_PMD_SHIFT,ASM_BITS_PER_PMD,\index #else # if defined(CONFIG_64BIT) @@ -436,7 +436,7 @@ * all ILP32 processes and all the kernel for machines with * under 4GB of memory) */ .macro L3_ptep pgd,pte,index,va,fault -#if PT_NLEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */ +#if CONFIG_PGTABLE_LEVELS == 3 /* we might have a 2-Level scheme, e.g. with 16kb page size */ extrd,u \va,63-ASM_PGDIR_SHIFT,ASM_BITS_PER_PGD,\index copy %r0,\pte extrd,u,*= \va,63-ASM_PGDIR_SHIFT,64-ASM_PGDIR_SHIFT,%r0 diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S index d4dc588c0dc1..e7d64527aff9 100644 --- a/arch/parisc/kernel/head.S +++ b/arch/parisc/kernel/head.S @@ -74,7 +74,7 @@ $bss_loop: mtctl %r4,%cr24 /* Initialize kernel root pointer */ mtctl %r4,%cr25 /* Initialize user root pointer */ -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 /* Set pmd in pgd */ load32 PA(pmd0),%r5 shrd %r5,PxD_VALUE_SHIFT,%r3 @@ -97,7 +97,7 @@ $bss_loop: stw %r3,0(%r4) ldo (PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3 addib,> -1,%r1,1b -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 ldo ASM_PMD_ENTRY_SIZE(%r4),%r4 #else ldo ASM_PGD_ENTRY_SIZE(%r4),%r4 diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 0bef864264c0..849226b0f21e 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -34,7 +34,7 @@ extern int data_start; extern void parisc_kernel_start(void); /* Kernel entry point in head.S */ -#if PT_NLEVELS == 3 +#if CONFIG_PGTABLE_LEVELS == 3 /* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout * with the first pmd adjacent to the pgd and below it. gcc doesn't actually * guarantee that global objects will be laid out in memory in the same order -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
