| #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_FILE 6 |
| #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
| #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
| #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ |
| #define _PAGE_BIT_UNUSED2 10 |
| #define _PAGE_BIT_UNUSED3 11 |
| #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| |
| #define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT) |
| #define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW) |
| #define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER) |
| #define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT) |
| #define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD) |
| #define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED) |
| #define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY) |
| #define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */ |
| #define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */ |
| #define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1) |
| #define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2) |
| #define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3) |
| |
| #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
| #define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX) |
| #else |
| #define _PAGE_NX 0 |
| #endif |
| |
| /* If _PAGE_PRESENT is clear, we use these: */ |
| #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_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_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) |
| |
| #ifdef CONFIG_X86_32 |
| #define _PAGE_KERNEL_EXEC \ |
| (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) |
| #define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX) |
| |
| #ifndef __ASSEMBLY__ |
| extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC; |
| #endif /* __ASSEMBLY__ */ |
| #else |
| #define __PAGE_KERNEL_EXEC \ |
| (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) |
| #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
| #endif |
| |
| #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) |
| #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) |
| #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
| #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
| #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) |
| #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
| #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
| |
| #ifdef CONFIG_X86_32 |
| # define MAKE_GLOBAL(x) __pgprot((x)) |
| #else |
| # define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) |
| #endif |
| |
| #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) |
| #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_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) |
| #define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) |
| #define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC) |
| #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) |
| #define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) |
| |
| /* xwr */ |
| #define __P000 PAGE_NONE |
| #define __P001 PAGE_READONLY |
| #define __P010 PAGE_COPY |
| #define __P011 PAGE_COPY |
| #define __P100 PAGE_READONLY_EXEC |
| #define __P101 PAGE_READONLY_EXEC |
| #define __P110 PAGE_COPY_EXEC |
| #define __P111 PAGE_COPY_EXEC |
| |
| #define __S000 PAGE_NONE |
| #define __S001 PAGE_READONLY |
| #define __S010 PAGE_SHARED |
| #define __S011 PAGE_SHARED |
| #define __S100 PAGE_READONLY_EXEC |
| #define __S101 PAGE_READONLY_EXEC |
| #define __S110 PAGE_SHARED_EXEC |
| #define __S111 PAGE_SHARED_EXEC |
| |
| #ifndef __ASSEMBLY__ |
| /* |
| * 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 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) & ~_PAGE_DIRTY); } |
| static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_ACCESSED); } |
| static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_RW); } |
| static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~_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) & ~_PAGE_PSE); } |
| |
| extern pteval_t __supported_pte_mask; |
| |
| static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| { |
| return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | |
| pgprot_val(pgprot)) & __supported_pte_mask); |
| } |
| |
| static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| { |
| return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) | |
| pgprot_val(pgprot)) & __supported_pte_mask); |
| } |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #ifdef CONFIG_X86_32 |
| # include "pgtable_32.h" |
| #else |
| # include "pgtable_64.h" |
| #endif |
| |
| #endif /* _ASM_X86_PGTABLE_H */ |