1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef _I386_PGTABLE_H 13 #define _I386_PGTABLE_H 14 15 #ifndef __ASSEMBLY__ 16 #include <asm/processor.h> 17 #include <asm/fixmap.h> 18 #include <linux/threads.h> 19 #include <asm/paravirt.h> 20 21 #include <linux/bitops.h> 22 #include <linux/slab.h> 23 #include <linux/list.h> 24 #include <linux/spinlock.h> 25 26 struct mm_struct; 27 struct vm_area_struct; 28 29 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 30 31 #include <asm/pgtable-2level-defs.h> 32 33 #define PGDIR_SIZE (1UL << PGDIR_SHIFT) 34 #define PGDIR_MASK (~(PGDIR_SIZE-1)) 35 36 #define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE) 37 #define FIRST_USER_ADDRESS 0 38 39 #define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT) 40 #define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS) 41 42 #define TWOLEVEL_PGDIR_SHIFT 22 43 #define BOOT_USER_PGD_PTRS (__PAGE_OFFSET >> TWOLEVEL_PGDIR_SHIFT) 44 #define BOOT_KERNEL_PGD_PTRS (1024-BOOT_USER_PGD_PTRS) 45 46 #define VMALLOC_OFFSET (8*1024*1024) 47 #define VMALLOC_START (((unsigned long) high_memory + 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1)) 48 #define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE) 49 50 #define _PAGE_BIT_PRESENT 0 51 #define _PAGE_BIT_RW 1 52 #define _PAGE_BIT_USER 2 53 #define _PAGE_BIT_PWT 3 54 #define _PAGE_BIT_PCD 4 55 #define _PAGE_BIT_ACCESSED 5 56 #define _PAGE_BIT_DIRTY 6 57 #define _PAGE_BIT_PSE 7 58 #define _PAGE_BIT_GLOBAL 8 59 #define _PAGE_BIT_UNUSED1 9 60 #define _PAGE_BIT_UNUSED2 10 61 #define _PAGE_BIT_UNUSED3 11 62 #define _PAGE_BIT_NX 63 63 64 #define _PAGE_PRESENT 0x001 65 #define _PAGE_RW 0x002 66 #define _PAGE_USER 0x004 67 #define _PAGE_PWT 0x008 68 #define _PAGE_PCD 0x010 69 #define _PAGE_ACCESSED 0x020 70 #define _PAGE_DIRTY 0x040 71 #define _PAGE_PSE 0x080 72 #define _PAGE_GLOBAL 0x100 73 #define _PAGE_UNUSED1 0x200 74 #define _PAGE_UNUSED2 0x400 75 #define _PAGE_UNUSED3 0x800 76 77 #define _PAGE_FILE 0x040 78 #define _PAGE_PROTNONE 0x080 79 #define _PAGE_NX 0 80 81 #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) 82 #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) 83 #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) 84 85 #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) 86 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) 87 88 #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) 89 #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) 90 #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) 91 #define PAGE_COPY PAGE_COPY_NOEXEC 92 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) 93 #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) 94 95 #define _PAGE_KERNEL (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) 96 #define _PAGE_KERNEL_EXEC (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) 97 98 #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) 99 #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) 100 #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD) 101 #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) 102 #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) 103 104 #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) 105 #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) 106 #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) 107 #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) 108 #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) 109 #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) 110 #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) 111 112 #define __P000 PAGE_NONE 113 #define __P001 PAGE_READONLY 114 #define __P010 PAGE_COPY 115 #define __P011 PAGE_COPY 116 #define __P100 PAGE_READONLY_EXEC 117 #define __P101 PAGE_READONLY_EXEC 118 #define __P110 PAGE_COPY_EXEC 119 #define __P111 PAGE_COPY_EXEC 120 121 #define __S000 PAGE_NONE 122 #define __S001 PAGE_READONLY 123 #define __S010 PAGE_SHARED 124 #define __S011 PAGE_SHARED 125 #define __S100 PAGE_READONLY_EXEC 126 #define __S101 PAGE_READONLY_EXEC 127 #define __S110 PAGE_SHARED_EXEC 128 #define __S111 PAGE_SHARED_EXEC 129 130 #undef TEST_ACCESS_OK 131 132 #define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE)) 133 134 #define pmd_none(x) (!(unsigned long)pmd_val(x)) 135 #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) 136 #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) 137 138 #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) 139 140 #include <asm/pgtable-2level.h> 141 #define pte_update(mm, addr, ptep) do { } while (0) 142 #define pte_update_defer(mm, addr, ptep) do { } while (0) 143 #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS 144 #define ptep_set_access_flags(vma, address, ptep, entry, dirty) ({ int __changed = !pte_same(*(ptep), entry); if (__changed && dirty) { (ptep)->pte_low = (entry).pte_low; pte_update_defer((vma)->vm_mm, (address), (ptep)); flush_tlb_page(vma, address); } __changed; }) 145 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG 146 #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_low); if (__ret) pte_update((vma)->vm_mm, addr, ptep); __ret; }) 147 #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH 148 #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; }) 149 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR 150 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL 151 #define __HAVE_ARCH_PTEP_SET_WRPROTECT 152 #define pgprot_noncached(prot) ((boot_cpu_data.x86 > 3) ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) : (prot)) 153 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 154 #define pmd_large(pmd) ((pmd_val(pmd) & (_PAGE_PSE|_PAGE_PRESENT)) == (_PAGE_PSE|_PAGE_PRESENT)) 155 #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) 156 #define pgd_index_k(addr) pgd_index(addr) 157 #define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address)) 158 #define pgd_offset_k(address) pgd_offset(&init_mm, address) 159 #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) 160 #define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) 161 #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address)) 162 #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) 163 #define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK)) 164 165 #define pte_offset_map(dir, address) ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address)) 166 #define pte_offset_map_nested(dir, address) pte_offset_map(dir, address) 167 #define pte_unmap(pte) do { } while (0) 168 #define pte_unmap_nested(pte) do { } while (0) 169 #define kpte_clear_flush(ptep, vaddr) do { pte_clear(&init_mm, vaddr, ptep); __flush_tlb_one(vaddr); } while (0) 170 #define update_mmu_cache(vma,address,pte) do { } while (0) 171 172 #endif 173 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) remap_pfn_range(vma, vaddr, pfn, size, prot) 174 #include <asm-generic/pgtable.h> 175 #endif 176