#ifndef _ASM_X86_PGTABLE_H
#define _ASM_X86_PGTABLE_H
-#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
#define FIRST_USER_ADDRESS 0
-#define _PAGE_BIT_PRESENT 0
-#define _PAGE_BIT_RW 1
-#define _PAGE_BIT_USER 2
-#define _PAGE_BIT_PWT 3
-#define _PAGE_BIT_PCD 4
-#define _PAGE_BIT_ACCESSED 5
-#define _PAGE_BIT_DIRTY 6
+#define _PAGE_BIT_PRESENT 0 /* is present */
+#define _PAGE_BIT_RW 1 /* writeable */
+#define _PAGE_BIT_USER 2 /* userspace addressable */
+#define _PAGE_BIT_PWT 3 /* page write through */
+#define _PAGE_BIT_PCD 4 /* page cache disabled */
+#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
+#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
#define _PAGE_BIT_FILE 6
#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
#define _PAGE_BIT_PAT 7 /* on 4KB pages */
#endif
/* If _PAGE_PRESENT is clear, we use these: */
-#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */
+#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping,
+ * saved PTE; unset:swap */
#define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE;
pte_present gives true */
-#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
+ _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
+ _PAGE_DIRTY)
#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
-#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
+#define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT)
+#define _PAGE_CACHE_WB (0)
+#define _PAGE_CACHE_WC (_PAGE_PWT)
+#define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
+#define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
-#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
-#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
-#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
+#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
+ _PAGE_ACCESSED | _PAGE_NX)
+
+#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
+ _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
+ _PAGE_ACCESSED | _PAGE_NX)
+#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
+ _PAGE_ACCESSED)
#define PAGE_COPY PAGE_COPY_NOEXEC
-#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
-#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
+ _PAGE_ACCESSED | _PAGE_NX)
+#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
+ _PAGE_ACCESSED)
#ifdef CONFIG_X86_32
#define _PAGE_KERNEL_EXEC \
#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
#define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
+#define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
#define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
#define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
+#define PAGE_KERNEL_WC MAKE_GLOBAL(__PAGE_KERNEL_WC)
#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
#define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS)
#define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE)
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..
*/
-extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
+extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
extern spinlock_t pgd_lock;
* The following only work if pte_present() is true.
* Undefined behaviour if not..
*/
-static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
-static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
-static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
-static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
-static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; }
-static inline int pte_global(pte_t pte) { return pte_val(pte) & _PAGE_GLOBAL; }
-static inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_NX); }
-
-static inline int pmd_large(pmd_t pte) {
- return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
- (_PAGE_PSE|_PAGE_PRESENT);
+static inline int pte_dirty(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_DIRTY;
+}
+
+static inline int pte_young(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_ACCESSED;
+}
+
+static inline int pte_write(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_RW;
+}
+
+static inline int pte_file(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_FILE;
+}
+
+static inline int pte_huge(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_PSE;
+}
+
+static inline int pte_global(pte_t pte)
+{
+ return pte_val(pte) & _PAGE_GLOBAL;
+}
+
+static inline int pte_exec(pte_t pte)
+{
+ return !(pte_val(pte) & _PAGE_NX);
+}
+
+static inline int pmd_large(pmd_t pte)
+{
+ return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
+ (_PAGE_PSE | _PAGE_PRESENT);
+}
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(pteval_t)_PAGE_DIRTY);
+}
+
+static inline pte_t pte_mkold(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED);
+}
+
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(pteval_t)_PAGE_RW);
}
-static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); }
-static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); }
-static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_RW); }
-static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_NX); }
-static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | _PAGE_DIRTY); }
-static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | _PAGE_ACCESSED); }
-static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_RW); }
-static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); }
-static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_PSE); }
-static inline pte_t pte_mkglobal(pte_t pte) { return __pte(pte_val(pte) | _PAGE_GLOBAL); }
-static inline pte_t pte_clrglobal(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_GLOBAL); }
+static inline pte_t pte_mkexec(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(pteval_t)_PAGE_NX);
+}
+
+static inline pte_t pte_mkdirty(pte_t pte)
+{
+ return __pte(pte_val(pte) | _PAGE_DIRTY);
+}
+
+static inline pte_t pte_mkyoung(pte_t pte)
+{
+ return __pte(pte_val(pte) | _PAGE_ACCESSED);
+}
+
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+ return __pte(pte_val(pte) | _PAGE_RW);
+}
+
+static inline pte_t pte_mkhuge(pte_t pte)
+{
+ return __pte(pte_val(pte) | _PAGE_PSE);
+}
+
+static inline pte_t pte_clrhuge(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(pteval_t)_PAGE_PSE);
+}
+
+static inline pte_t pte_mkglobal(pte_t pte)
+{
+ return __pte(pte_val(pte) | _PAGE_GLOBAL);
+}
+
+static inline pte_t pte_clrglobal(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(pteval_t)_PAGE_GLOBAL);
+}
extern pteval_t __supported_pte_mask;
#define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
+#ifndef __ASSEMBLY__
+#define __HAVE_PHYS_MEM_ACCESS_PROT
+struct file;
+pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
+ unsigned long size, pgprot_t vma_prot);
+int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
+ unsigned long size, pgprot_t *vma_prot);
+#endif
+
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else /* !CONFIG_PARAVIRT */
# include "pgtable_64.h"
#endif
+#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET)
+#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
+
#ifndef __ASSEMBLY__
enum {
* bit at the same time.
*/
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
-({ \
- int __changed = !pte_same(*(ptep), entry); \
- if (__changed && dirty) { \
- *ptep = entry; \
- pte_update_defer((vma)->vm_mm, (address), (ptep)); \
- flush_tlb_page(vma, address); \
- } \
- __changed; \
-})
+extern int ptep_set_access_flags(struct vm_area_struct *vma,
+ unsigned long address, pte_t *ptep,
+ pte_t entry, int dirty);
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
- int __ret = 0; \
- if (pte_young(*(ptep))) \
- __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
- &(ptep)->pte); \
- if (__ret) \
- pte_update((vma)->vm_mm, addr, ptep); \
- __ret; \
-})
+extern int ptep_test_and_clear_young(struct vm_area_struct *vma,
+ unsigned long addr, pte_t *ptep);
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
-#define ptep_clear_flush_young(vma, address, ptep) \
-({ \
- int __young; \
- __young = ptep_test_and_clear_young((vma), (address), (ptep)); \
- if (__young) \
- flush_tlb_page(vma, address); \
- __young; \
-})
+extern int ptep_clear_flush_young(struct vm_area_struct *vma,
+ unsigned long address, pte_t *ptep);
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep)
{
pte_t pte = native_ptep_get_and_clear(ptep);
pte_update(mm, addr, ptep);
}
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
-static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
+static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
+ unsigned long addr, pte_t *ptep,
+ int full)
{
pte_t pte;
if (full) {
}
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+static inline void ptep_set_wrprotect(struct mm_struct *mm,
+ unsigned long addr, pte_t *ptep)
{
clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
pte_update(mm, addr, ptep);
}
+/*
+ * 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));
+}
+
+
#include <asm-generic/pgtable.h>
#endif /* __ASSEMBLY__ */
git.samba.org / sfrench / cifs-2.6.git / blobdiff