From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Davies Date: Sat, 13 Jan 2007 13:48:30 +1100 Message-Id: <20070113024830.29682.99345.sendpatchset@weill.orchestra.cse.unsw.EDU.AU> In-Reply-To: <20070113024540.29682.27024.sendpatchset@weill.orchestra.cse.unsw.EDU.AU> References: <20070113024540.29682.27024.sendpatchset@weill.orchestra.cse.unsw.EDU.AU> Subject: [PATCH 3/5] Abstact pgtable continued. Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org Cc: Paul Davies List-ID: PATCH IA64 03 * Continue abstracting implementation dependent pgtable.h code into pgtable-default.h Signed-Off-By: Paul Davies --- arch/ia64/mm/init.c | 2 include/asm-ia64/pgtable-default.h | 93 +++++++++++++++++++++++++++++++++++++ include/asm-ia64/pgtable.h | 84 ++------------------------------- 3 files changed, 101 insertions(+), 78 deletions(-) Index: linux-2.6.20-rc1/include/asm-ia64/pgtable-default.h =================================================================== --- linux-2.6.20-rc1.orig/include/asm-ia64/pgtable-default.h 2006-12-23 20:24:57.791909000 +1100 +++ linux-2.6.20-rc1/include/asm-ia64/pgtable-default.h 2006-12-23 20:26:33.219909000 +1100 @@ -51,4 +51,97 @@ #define PTRS_PER_PGD (1UL << PTRS_PER_PGD_SHIFT) #define USER_PTRS_PER_PGD (5*PTRS_PER_PGD/8) /* regions 0-4 are user regions */ +# ifndef __ASSEMBLY__ + +#include /* for mm_struct */ +#include +#include +#include +#include + + +#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e)) +#ifdef CONFIG_PGTABLE_4 +#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e)) +#endif +#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) + + +#define pmd_none(pmd) (!pmd_val(pmd)) +#define pmd_bad(pmd) (!ia64_phys_addr_valid(pmd_val(pmd))) +#define pmd_present(pmd) (pmd_val(pmd) != 0UL) +#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL) +#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & _PFN_MASK)) +#define pmd_page(pmd) virt_to_page((pmd_val(pmd) + PAGE_OFFSET)) + +#define pud_none(pud) (!pud_val(pud)) +#define pud_bad(pud) (!ia64_phys_addr_valid(pud_val(pud))) +#define pud_present(pud) (pud_val(pud) != 0UL) +#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL) +#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK)) +#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET)) + +#ifdef CONFIG_PGTABLE_4 +#define pgd_none(pgd) (!pgd_val(pgd)) +#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd))) +#define pgd_present(pgd) (pgd_val(pgd) != 0UL) +#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL) +#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & _PFN_MASK)) +#define pgd_page(pgd) virt_to_page((pgd_val(pgd) + PAGE_OFFSET)) +#endif + +static inline unsigned long +pgd_index (unsigned long address) +{ + unsigned long region = address >> 61; + unsigned long l1index = (address >> PGDIR_SHIFT) & ((PTRS_PER_PGD >> 3) - 1); + + return (region << (PAGE_SHIFT - 6)) | l1index; +} + +/* The offset in the 1-level directory is given by the 3 region bits + (61..63) and the level-1 bits. */ +static inline pgd_t* +pgd_offset (struct mm_struct *mm, unsigned long address) +{ + return mm->page_table.pgd + pgd_index(address); +} + +/* In the kernel's mapped region we completely ignore the region number + (since we know it's in region number 5). */ +#define pgd_offset_k(addr) \ + (init_mm.page_table.pgd + (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))) + +/* Look up a pgd entry in the gate area. On IA-64, the gate-area + resides in the kernel-mapped segment, hence we use pgd_offset_k() + here. */ +#define pgd_offset_gate(mm, addr) pgd_offset_k(addr) + +#ifdef CONFIG_PGTABLE_4 +/* Find an entry in the second-level page table.. */ +#define pud_offset(dir,addr) \ + ((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))) +#endif + +/* Find an entry in the third-level page table.. */ +#define pmd_offset(dir,addr) \ + ((pmd_t *) pud_page_vaddr(*(dir)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))) + +/* + * Find an entry in the third-level page table. This looks more complicated than it + * should be because some platforms place page tables in high memory. + */ +#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) +#define pte_offset_kernel(dir,addr) ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(addr)) +#define pte_offset_map(dir,addr) pte_offset_kernel(dir, addr) +#define pte_offset_map_nested(dir,addr) pte_offset_map(dir, addr) + +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + +#define RGN_MAP_SHIFT (PGDIR_SHIFT + PTRS_PER_PGD_SHIFT - 3) + +#define ALIGNVAL (1UL << PMD_SHIFT) + +# endif /* !__ASSEMBLY__ */ + #endif Index: linux-2.6.20-rc1/include/asm-ia64/pgtable.h =================================================================== --- linux-2.6.20-rc1.orig/include/asm-ia64/pgtable.h 2006-12-23 20:26:16.243909000 +1100 +++ linux-2.6.20-rc1/include/asm-ia64/pgtable.h 2006-12-23 20:32:51.431909000 +1100 @@ -23,6 +23,10 @@ #include #endif +#ifdef CONFIG_PT_GPT +#include +#endif + #define IA64_MAX_PHYS_BITS 50 /* max. number of physical address bits (architected) */ /* @@ -137,14 +141,8 @@ #define __S110 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX) #define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX) -#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e)) -#ifdef CONFIG_PGTABLE_4 -#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e)) -#endif -#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) #define pte_ERROR(e) printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e)) - /* * Some definitions to translate between mem_map, PTEs, and page addresses: */ @@ -198,7 +196,6 @@ #define kc_vaddr_to_offset(v) ((v) - RGN_BASE(RGN_GATE)) #define kc_offset_to_vaddr(o) ((o) + RGN_BASE(RGN_GATE)) -#define RGN_MAP_SHIFT (PGDIR_SHIFT + PTRS_PER_PGD_SHIFT - 3) #define RGN_MAP_LIMIT ((1UL << RGN_MAP_SHIFT) - PAGE_SIZE) /* per region addr limit */ /* @@ -226,29 +223,6 @@ /* pte_page() returns the "struct page *" corresponding to the PTE: */ #define pte_page(pte) virt_to_page(((pte_val(pte) & _PFN_MASK) + PAGE_OFFSET)) -#define pmd_none(pmd) (!pmd_val(pmd)) -#define pmd_bad(pmd) (!ia64_phys_addr_valid(pmd_val(pmd))) -#define pmd_present(pmd) (pmd_val(pmd) != 0UL) -#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL) -#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & _PFN_MASK)) -#define pmd_page(pmd) virt_to_page((pmd_val(pmd) + PAGE_OFFSET)) - -#define pud_none(pud) (!pud_val(pud)) -#define pud_bad(pud) (!ia64_phys_addr_valid(pud_val(pud))) -#define pud_present(pud) (pud_val(pud) != 0UL) -#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL) -#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK)) -#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET)) - -#ifdef CONFIG_PGTABLE_4 -#define pgd_none(pgd) (!pgd_val(pgd)) -#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd))) -#define pgd_present(pgd) (pgd_val(pgd) != 0UL) -#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL) -#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & _PFN_MASK)) -#define pgd_page(pgd) virt_to_page((pgd_val(pgd) + PAGE_OFFSET)) -#endif - /* * The following have defined behavior only work if pte_present() is true. */ @@ -287,51 +261,6 @@ unsigned long size, pgprot_t vma_prot); #define __HAVE_PHYS_MEM_ACCESS_PROT -static inline unsigned long -pgd_index (unsigned long address) -{ - unsigned long region = address >> 61; - unsigned long l1index = (address >> PGDIR_SHIFT) & ((PTRS_PER_PGD >> 3) - 1); - - return (region << (PAGE_SHIFT - 6)) | l1index; -} - -/* The offset in the 1-level directory is given by the 3 region bits - (61..63) and the level-1 bits. */ -static inline pgd_t* -pgd_offset (struct mm_struct *mm, unsigned long address) -{ - return mm->page_table.pgd + pgd_index(address); -} - -/* In the kernel's mapped region we completely ignore the region number - (since we know it's in region number 5). */ -#define pgd_offset_k(addr) \ - (init_mm.page_table.pgd + (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))) - -/* Look up a pgd entry in the gate area. On IA-64, the gate-area - resides in the kernel-mapped segment, hence we use pgd_offset_k() - here. */ -#define pgd_offset_gate(mm, addr) pgd_offset_k(addr) - -#ifdef CONFIG_PGTABLE_4 -/* Find an entry in the second-level page table.. */ -#define pud_offset(dir,addr) \ - ((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))) -#endif - -/* Find an entry in the third-level page table.. */ -#define pmd_offset(dir,addr) \ - ((pmd_t *) pud_page_vaddr(*(dir)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))) - -/* - * Find an entry in the third-level page table. This looks more complicated than it - * should be because some platforms place page tables in high memory. - */ -#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) -#define pte_offset_kernel(dir,addr) ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(addr)) -#define pte_offset_map(dir,addr) pte_offset_kernel(dir, addr) -#define pte_offset_map_nested(dir,addr) pte_offset_map(dir, addr) #define pte_unmap(pte) do { } while (0) #define pte_unmap_nested(pte) do { } while (0) @@ -405,7 +334,6 @@ #define update_mmu_cache(vma, address, pte) do { } while (0) -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern void paging_init (void); /* @@ -554,7 +482,9 @@ #ifndef CONFIG_PGTABLE_4 #include #endif -#include #endif +#include + + #endif /* _ASM_IA64_PGTABLE_H */ Index: linux-2.6.20-rc1/arch/ia64/mm/init.c =================================================================== --- linux-2.6.20-rc1.orig/arch/ia64/mm/init.c 2006-12-23 20:24:49.187909000 +1100 +++ linux-2.6.20-rc1/arch/ia64/mm/init.c 2006-12-23 20:33:20.435909000 +1100 @@ -426,7 +426,7 @@ end_address += PAGE_SIZE; pte++; if ((end_address < stop_address) && - (end_address != ALIGN(end_address, 1UL << PMD_SHIFT))) + (end_address != ALIGN(end_address, ALIGNVAL))) goto retry_pte; continue; } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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