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Diffstat (limited to 'include/asm-x86/pgtable_32.h')
-rw-r--r--include/asm-x86/pgtable_32.h126
1 files changed, 59 insertions, 67 deletions
diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h
index 4e6a0fca0b4..577ab79c4c2 100644
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -40,16 +40,13 @@ void paging_init(void);
#ifdef CONFIG_X86_PAE
# include <asm/pgtable-3level-defs.h>
# define PMD_SIZE (1UL << PMD_SHIFT)
-# define PMD_MASK (~(PMD_SIZE-1))
+# define PMD_MASK (~(PMD_SIZE - 1))
#else
# include <asm/pgtable-2level-defs.h>
#endif
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
-#define PGDIR_MASK (~(PGDIR_SIZE-1))
-
-#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
-#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
+#define PGDIR_MASK (~(PGDIR_SIZE - 1))
/* Just any arbitrary offset to the start of the vmalloc VM area: the
* current 8MB value just means that there will be a 8MB "hole" after the
@@ -58,21 +55,22 @@ void paging_init(void);
* The vmalloc() routines leaves a hole of 4kB between each vmalloced
* area for the same reason. ;)
*/
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long) high_memory + \
- 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1))
+#define VMALLOC_OFFSET (8 * 1024 * 1024)
+#define VMALLOC_START (((unsigned long)high_memory + 2 * VMALLOC_OFFSET - 1) \
+ & ~(VMALLOC_OFFSET - 1))
#ifdef CONFIG_X86_PAE
#define LAST_PKMAP 512
#else
#define LAST_PKMAP 1024
#endif
-#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE*(LAST_PKMAP + 1)) & PMD_MASK)
+#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
+ & PMD_MASK)
#ifdef CONFIG_HIGHMEM
-# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
+# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
#else
-# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
+# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
#endif
/*
@@ -88,10 +86,16 @@ extern unsigned long pg0[];
#define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE))
/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */
-#define pmd_none(x) (!(unsigned long)pmd_val(x))
-#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
-#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
+#define pmd_none(x) (!(unsigned long)pmd_val((x)))
+#define pmd_present(x) (pmd_val((x)) & _PAGE_PRESENT)
+
+extern int pmd_bad(pmd_t pmd);
+#define pmd_bad_v1(x) \
+ (_KERNPG_TABLE != (pmd_val((x)) & ~(PAGE_MASK | _PAGE_USER)))
+#define pmd_bad_v2(x) \
+ (_KERNPG_TABLE != (pmd_val((x)) & ~(PAGE_MASK | _PAGE_USER | \
+ _PAGE_PSE | _PAGE_NX)))
#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
@@ -102,32 +106,18 @@ extern unsigned long pg0[];
#endif
/*
- * clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
- *
- * dst - pointer to pgd range anwhere on a pgd page
- * src - ""
- * count - the number of pgds to copy.
- *
- * dst and src can be on the same page, but the range must not overlap,
- * and must not cross a page boundary.
- */
-static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
-{
- memcpy(dst, src, count * sizeof(pgd_t));
-}
-
-/*
- * Macro to mark a page protection value as "uncacheable". On processors which do not support
- * it, this is a no-op.
+ * Macro to mark a page protection value as "uncacheable".
+ * On processors which do not support it, this is a no-op.
*/
-#define pgprot_noncached(prot) ((boot_cpu_data.x86 > 3) \
- ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) : (prot))
+#define pgprot_noncached(prot) \
+ ((boot_cpu_data.x86 > 3) \
+ ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) \
+ : (prot))
/*
* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*/
-
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
/*
@@ -136,20 +126,20 @@ static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count)
* this macro returns the index of the entry in the pgd page which would
* control the given virtual address
*/
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-#define pgd_index_k(addr) pgd_index(addr)
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+#define pgd_index_k(addr) pgd_index((addr))
/*
* pgd_offset() returns a (pgd_t *)
* pgd_index() is used get the offset into the pgd page's array of pgd_t's;
*/
-#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
+#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
/*
* a shortcut which implies the use of the kernel's pgd, instead
* of a process's
*/
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
+#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
static inline int pud_large(pud_t pud) { return 0; }
@@ -159,8 +149,8 @@ static inline int pud_large(pud_t pud) { return 0; }
* this macro returns the index of the entry in the pmd page which would
* control the given virtual address
*/
-#define pmd_index(address) \
- (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
+#define pmd_index(address) \
+ (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
/*
* the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
@@ -168,54 +158,56 @@ static inline int pud_large(pud_t pud) { return 0; }
* this macro returns the index of the entry in the pte page which would
* control the given virtual address
*/
-#define pte_index(address) \
- (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
-#define pte_offset_kernel(dir, address) \
- ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
+#define pte_index(address) \
+ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+#define pte_offset_kernel(dir, address) \
+ ((pte_t *)pmd_page_vaddr(*(dir)) + pte_index((address)))
-#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+#define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
-#define pmd_page_vaddr(pmd) \
- ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+#define pmd_page_vaddr(pmd) \
+ ((unsigned long)__va(pmd_val((pmd)) & PAGE_MASK))
#if defined(CONFIG_HIGHPTE)
-#define pte_offset_map(dir, address) \
- ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
-#define pte_offset_map_nested(dir, address) \
- ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
-#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
-#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
+#define pte_offset_map(dir, address) \
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE0) + \
+ pte_index((address)))
+#define pte_offset_map_nested(dir, address) \
+ ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE1) + \
+ pte_index((address)))
+#define pte_unmap(pte) kunmap_atomic((pte), KM_PTE0)
+#define pte_unmap_nested(pte) kunmap_atomic((pte), KM_PTE1)
#else
-#define pte_offset_map(dir, address) \
- ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
-#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)
+#define pte_offset_map(dir, address) \
+ ((pte_t *)page_address(pmd_page(*(dir))) + pte_index((address)))
+#define pte_offset_map_nested(dir, address) pte_offset_map((dir), (address))
#define pte_unmap(pte) do { } while (0)
#define pte_unmap_nested(pte) do { } while (0)
#endif
/* Clear a kernel PTE and flush it from the TLB */
-#define kpte_clear_flush(ptep, vaddr) \
-do { \
- pte_clear(&init_mm, vaddr, ptep); \
- __flush_tlb_one(vaddr); \
+#define kpte_clear_flush(ptep, vaddr) \
+do { \
+ pte_clear(&init_mm, (vaddr), (ptep)); \
+ __flush_tlb_one((vaddr)); \
} while (0)
/*
* The i386 doesn't have any external MMU info: the kernel page
* tables contain all the necessary information.
*/
-#define update_mmu_cache(vma,address,pte) do { } while (0)
+#define update_mmu_cache(vma, address, pte) do { } while (0)
-void native_pagetable_setup_start(pgd_t *base);
-void native_pagetable_setup_done(pgd_t *base);
+extern void native_pagetable_setup_start(pgd_t *base);
+extern void native_pagetable_setup_done(pgd_t *base);
#ifndef CONFIG_PARAVIRT
-static inline void paravirt_pagetable_setup_start(pgd_t *base)
+static inline void __init paravirt_pagetable_setup_start(pgd_t *base)
{
native_pagetable_setup_start(base);
}
-static inline void paravirt_pagetable_setup_done(pgd_t *base)
+static inline void __init paravirt_pagetable_setup_done(pgd_t *base)
{
native_pagetable_setup_done(base);
}
@@ -233,7 +225,7 @@ static inline void paravirt_pagetable_setup_done(pgd_t *base)
#define kern_addr_valid(kaddr) (0)
#endif
-#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
- remap_pfn_range(vma, vaddr, pfn, size, prot)
+#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+ remap_pfn_range(vma, vaddr, pfn, size, prot)
#endif /* _I386_PGTABLE_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 15:01:26 +0000