Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 1 | #ifndef ASM_X86__PGTABLE_H |
| 2 | #define ASM_X86__PGTABLE_H |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 3 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 4 | #define FIRST_USER_ADDRESS 0 |
| 5 | |
Jiri Slaby | 43cdf5d | 2008-03-22 18:50:22 +0100 | [diff] [blame] | 6 | #define _PAGE_BIT_PRESENT 0 /* is present */ |
| 7 | #define _PAGE_BIT_RW 1 /* writeable */ |
| 8 | #define _PAGE_BIT_USER 2 /* userspace addressable */ |
| 9 | #define _PAGE_BIT_PWT 3 /* page write through */ |
| 10 | #define _PAGE_BIT_PCD 4 /* page cache disabled */ |
| 11 | #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ |
| 12 | #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 13 | #define _PAGE_BIT_FILE 6 |
| 14 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
Andi Kleen | 9bf5a47 | 2008-02-04 16:48:06 +0100 | [diff] [blame] | 15 | #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 16 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
| 17 | #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 18 | #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 19 | #define _PAGE_BIT_UNUSED3 11 |
Andi Kleen | 9bf5a47 | 2008-02-04 16:48:06 +0100 | [diff] [blame] | 20 | #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 21 | #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1 |
Jeremy Fitzhardinge | 110e035 | 2008-08-28 13:58:39 -0700 | [diff] [blame] | 22 | #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1 |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 23 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| 24 | |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 25 | #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) |
| 26 | #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) |
| 27 | #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) |
| 28 | #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) |
| 29 | #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) |
| 30 | #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) |
| 31 | #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) |
| 32 | #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) |
| 33 | #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) |
| 34 | #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1) |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 35 | #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP) |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 36 | #define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3) |
| 37 | #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) |
| 38 | #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 39 | #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) |
Jeremy Fitzhardinge | 110e035 | 2008-08-28 13:58:39 -0700 | [diff] [blame] | 40 | #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 41 | #define __HAVE_ARCH_PTE_SPECIAL |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 42 | |
| 43 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 44 | #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 45 | #else |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 46 | #define _PAGE_NX (_AT(pteval_t, 0)) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 47 | #endif |
| 48 | |
| 49 | /* If _PAGE_PRESENT is clear, we use these: */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 50 | #define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, |
| 51 | * saved PTE; unset:swap */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 52 | #define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE; |
| 53 | pte_present gives true */ |
| 54 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 55 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 56 | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 57 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ |
| 58 | _PAGE_DIRTY) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 59 | |
Jeremy Fitzhardinge | 86aaf4f | 2008-05-20 08:26:22 +0100 | [diff] [blame] | 60 | /* Set of bits not changed in pte_modify */ |
Jeremy Fitzhardinge | 59438c9 | 2008-07-21 22:59:42 -0700 | [diff] [blame] | 61 | #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 62 | _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 63 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 64 | #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) |
| 65 | #define _PAGE_CACHE_WB (0) |
| 66 | #define _PAGE_CACHE_WC (_PAGE_PWT) |
| 67 | #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) |
| 68 | #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) |
| 69 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 70 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 71 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 72 | _PAGE_ACCESSED | _PAGE_NX) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 73 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 74 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ |
| 75 | _PAGE_USER | _PAGE_ACCESSED) |
| 76 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 77 | _PAGE_ACCESSED | _PAGE_NX) |
| 78 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 79 | _PAGE_ACCESSED) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 80 | #define PAGE_COPY PAGE_COPY_NOEXEC |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 81 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 82 | _PAGE_ACCESSED | _PAGE_NX) |
| 83 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 84 | _PAGE_ACCESSED) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 85 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 86 | #define __PAGE_KERNEL_EXEC \ |
Jeremy Fitzhardinge | 8490638 | 2008-07-01 16:46:35 -0700 | [diff] [blame] | 87 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 88 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 89 | |
| 90 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) |
| 91 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) |
Ingo Molnar | d2e626f | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 92 | #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) |
venkatesh.pallipadi@intel.com | b310f38 | 2008-03-18 17:00:24 -0700 | [diff] [blame] | 93 | #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 94 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
Suresh Siddha | d546b67 | 2008-03-25 17:39:12 -0700 | [diff] [blame] | 95 | #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 96 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
| 97 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) |
| 98 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
Jack Steiner | 3a9e189 | 2008-07-01 14:45:32 -0500 | [diff] [blame] | 99 | #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 100 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
| 101 | |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 102 | #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP) |
| 103 | #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP) |
| 104 | #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP) |
| 105 | #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP) |
| 106 | |
Jeremy Fitzhardinge | 8490638 | 2008-07-01 16:46:35 -0700 | [diff] [blame] | 107 | #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) |
| 108 | #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) |
| 109 | #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) |
| 110 | #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) |
| 111 | #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC) |
| 112 | #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) |
| 113 | #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS) |
| 114 | #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE) |
| 115 | #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) |
Jack Steiner | 3a9e189 | 2008-07-01 14:45:32 -0500 | [diff] [blame] | 116 | #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE) |
Jeremy Fitzhardinge | 8490638 | 2008-07-01 16:46:35 -0700 | [diff] [blame] | 117 | #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) |
| 118 | #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) |
| 119 | #define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 120 | |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 121 | #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO) |
| 122 | #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE) |
| 123 | #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS) |
| 124 | #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC) |
| 125 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 126 | /* xwr */ |
| 127 | #define __P000 PAGE_NONE |
| 128 | #define __P001 PAGE_READONLY |
| 129 | #define __P010 PAGE_COPY |
| 130 | #define __P011 PAGE_COPY |
| 131 | #define __P100 PAGE_READONLY_EXEC |
| 132 | #define __P101 PAGE_READONLY_EXEC |
| 133 | #define __P110 PAGE_COPY_EXEC |
| 134 | #define __P111 PAGE_COPY_EXEC |
| 135 | |
| 136 | #define __S000 PAGE_NONE |
| 137 | #define __S001 PAGE_READONLY |
| 138 | #define __S010 PAGE_SHARED |
| 139 | #define __S011 PAGE_SHARED |
| 140 | #define __S100 PAGE_READONLY_EXEC |
| 141 | #define __S101 PAGE_READONLY_EXEC |
| 142 | #define __S110 PAGE_SHARED_EXEC |
| 143 | #define __S111 PAGE_SHARED_EXEC |
| 144 | |
Suresh Siddha | b2bc273 | 2008-09-23 14:00:36 -0700 | [diff] [blame] | 145 | /* |
| 146 | * early identity mapping pte attrib macros. |
| 147 | */ |
| 148 | #ifdef CONFIG_X86_64 |
| 149 | #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC |
| 150 | #else |
Suresh Siddha | f61f1b5 | 2008-10-15 07:46:27 -0700 | [diff] [blame] | 151 | /* |
| 152 | * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection |
| 153 | * bits are combined, this will alow user to access the high address mapped |
| 154 | * VDSO in the presence of CONFIG_COMPAT_VDSO |
| 155 | */ |
Suresh Siddha | 3a85e77 | 2008-09-23 14:00:37 -0700 | [diff] [blame] | 156 | #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ |
Suresh Siddha | f61f1b5 | 2008-10-15 07:46:27 -0700 | [diff] [blame] | 157 | #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */ |
Suresh Siddha | b2bc273 | 2008-09-23 14:00:36 -0700 | [diff] [blame] | 158 | #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ |
| 159 | #endif |
| 160 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 161 | #ifndef __ASSEMBLY__ |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 162 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 163 | /* |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 164 | * ZERO_PAGE is a global shared page that is always zero: used |
| 165 | * for zero-mapped memory areas etc.. |
| 166 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 167 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 168 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 169 | |
Jeremy Fitzhardinge | e3ed910 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 170 | extern spinlock_t pgd_lock; |
| 171 | extern struct list_head pgd_list; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 172 | |
| 173 | /* |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 174 | * The following only work if pte_present() is true. |
| 175 | * Undefined behaviour if not.. |
| 176 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 177 | static inline int pte_dirty(pte_t pte) |
| 178 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 179 | return pte_flags(pte) & _PAGE_DIRTY; |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 180 | } |
| 181 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 182 | static inline int pte_young(pte_t pte) |
| 183 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 184 | return pte_flags(pte) & _PAGE_ACCESSED; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | static inline int pte_write(pte_t pte) |
| 188 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 189 | return pte_flags(pte) & _PAGE_RW; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static inline int pte_file(pte_t pte) |
| 193 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 194 | return pte_flags(pte) & _PAGE_FILE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | static inline int pte_huge(pte_t pte) |
| 198 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 199 | return pte_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | static inline int pte_global(pte_t pte) |
| 203 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 204 | return pte_flags(pte) & _PAGE_GLOBAL; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | static inline int pte_exec(pte_t pte) |
| 208 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 209 | return !(pte_flags(pte) & _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 210 | } |
| 211 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 212 | static inline int pte_special(pte_t pte) |
| 213 | { |
Jan Beulich | 606ee44 | 2008-09-17 16:48:17 +0100 | [diff] [blame] | 214 | return pte_flags(pte) & _PAGE_SPECIAL; |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 215 | } |
| 216 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 217 | static inline unsigned long pte_pfn(pte_t pte) |
| 218 | { |
| 219 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 220 | } |
| 221 | |
| 222 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
| 223 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 224 | static inline int pmd_large(pmd_t pte) |
| 225 | { |
| 226 | return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
| 227 | (_PAGE_PSE | _PAGE_PRESENT); |
| 228 | } |
| 229 | |
| 230 | static inline pte_t pte_mkclean(pte_t pte) |
| 231 | { |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 232 | return __pte(pte_val(pte) & ~_PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | static inline pte_t pte_mkold(pte_t pte) |
| 236 | { |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 237 | return __pte(pte_val(pte) & ~_PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | static inline pte_t pte_wrprotect(pte_t pte) |
| 241 | { |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 242 | return __pte(pte_val(pte) & ~_PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | static inline pte_t pte_mkexec(pte_t pte) |
| 246 | { |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 247 | return __pte(pte_val(pte) & ~_PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | static inline pte_t pte_mkdirty(pte_t pte) |
| 251 | { |
| 252 | return __pte(pte_val(pte) | _PAGE_DIRTY); |
| 253 | } |
| 254 | |
| 255 | static inline pte_t pte_mkyoung(pte_t pte) |
| 256 | { |
| 257 | return __pte(pte_val(pte) | _PAGE_ACCESSED); |
| 258 | } |
| 259 | |
| 260 | static inline pte_t pte_mkwrite(pte_t pte) |
| 261 | { |
| 262 | return __pte(pte_val(pte) | _PAGE_RW); |
| 263 | } |
| 264 | |
| 265 | static inline pte_t pte_mkhuge(pte_t pte) |
| 266 | { |
| 267 | return __pte(pte_val(pte) | _PAGE_PSE); |
| 268 | } |
| 269 | |
| 270 | static inline pte_t pte_clrhuge(pte_t pte) |
| 271 | { |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 272 | return __pte(pte_val(pte) & ~_PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static inline pte_t pte_mkglobal(pte_t pte) |
| 276 | { |
| 277 | return __pte(pte_val(pte) | _PAGE_GLOBAL); |
| 278 | } |
| 279 | |
| 280 | static inline pte_t pte_clrglobal(pte_t pte) |
| 281 | { |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 282 | return __pte(pte_val(pte) & ~_PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 283 | } |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 284 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 285 | static inline pte_t pte_mkspecial(pte_t pte) |
| 286 | { |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 287 | return __pte(pte_val(pte) | _PAGE_SPECIAL); |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 288 | } |
| 289 | |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 290 | extern pteval_t __supported_pte_mask; |
| 291 | |
| 292 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| 293 | { |
| 294 | return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 295 | pgprot_val(pgprot)) & __supported_pte_mask); |
| 296 | } |
| 297 | |
| 298 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| 299 | { |
| 300 | return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 301 | pgprot_val(pgprot)) & __supported_pte_mask); |
| 302 | } |
| 303 | |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 304 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 305 | { |
| 306 | pteval_t val = pte_val(pte); |
| 307 | |
| 308 | /* |
| 309 | * Chop off the NX bit (if present), and add the NX portion of |
| 310 | * the newprot (if present): |
| 311 | */ |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 312 | val &= _PAGE_CHG_MASK; |
| 313 | val |= pgprot_val(newprot) & (~_PAGE_CHG_MASK) & __supported_pte_mask; |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 314 | |
| 315 | return __pte(val); |
| 316 | } |
| 317 | |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 318 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
| 319 | #define pgprot_modify pgprot_modify |
| 320 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
| 321 | { |
| 322 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
| 323 | pgprotval_t addbits = pgprot_val(newprot); |
| 324 | return __pgprot(preservebits | addbits); |
| 325 | } |
| 326 | |
Jeremy Fitzhardinge | 77be1fa | 2008-07-21 22:59:56 -0700 | [diff] [blame] | 327 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
Andi Kleen | c6ca18e | 2008-01-30 13:33:51 +0100 | [diff] [blame] | 328 | |
Andi Kleen | 1e8e23b | 2008-01-30 13:33:53 +0100 | [diff] [blame] | 329 | #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask) |
| 330 | |
venkatesh.pallipadi@intel.com | f0970c1 | 2008-03-18 17:00:20 -0700 | [diff] [blame] | 331 | #ifndef __ASSEMBLY__ |
| 332 | #define __HAVE_PHYS_MEM_ACCESS_PROT |
| 333 | struct file; |
| 334 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| 335 | unsigned long size, pgprot_t vma_prot); |
| 336 | int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, |
| 337 | unsigned long size, pgprot_t *vma_prot); |
| 338 | #endif |
| 339 | |
Jeremy Fitzhardinge | d494a96 | 2008-06-17 11:41:59 -0700 | [diff] [blame] | 340 | /* Install a pte for a particular vaddr in kernel space. */ |
| 341 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); |
| 342 | |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 343 | #ifdef CONFIG_X86_32 |
| 344 | extern void native_pagetable_setup_start(pgd_t *base); |
| 345 | extern void native_pagetable_setup_done(pgd_t *base); |
| 346 | #else |
| 347 | static inline void native_pagetable_setup_start(pgd_t *base) {} |
| 348 | static inline void native_pagetable_setup_done(pgd_t *base) {} |
| 349 | #endif |
| 350 | |
Jaswinder Singh | e0b7c81 | 2008-07-23 17:40:34 +0530 | [diff] [blame] | 351 | extern int arch_report_meminfo(char *page); |
| 352 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 353 | #ifdef CONFIG_PARAVIRT |
| 354 | #include <asm/paravirt.h> |
| 355 | #else /* !CONFIG_PARAVIRT */ |
| 356 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| 357 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
| 358 | |
| 359 | #define set_pte_present(mm, addr, ptep, pte) \ |
| 360 | native_set_pte_present(mm, addr, ptep, pte) |
| 361 | #define set_pte_atomic(ptep, pte) \ |
| 362 | native_set_pte_atomic(ptep, pte) |
| 363 | |
| 364 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| 365 | |
| 366 | #ifndef __PAGETABLE_PUD_FOLDED |
| 367 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| 368 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
| 369 | #endif |
| 370 | |
| 371 | #ifndef set_pud |
| 372 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| 373 | #endif |
| 374 | |
| 375 | #ifndef __PAGETABLE_PMD_FOLDED |
| 376 | #define pud_clear(pud) native_pud_clear(pud) |
| 377 | #endif |
| 378 | |
| 379 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| 380 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
| 381 | |
| 382 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 383 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 384 | |
| 385 | static inline void __init paravirt_pagetable_setup_start(pgd_t *base) |
| 386 | { |
| 387 | native_pagetable_setup_start(base); |
| 388 | } |
| 389 | |
| 390 | static inline void __init paravirt_pagetable_setup_done(pgd_t *base) |
| 391 | { |
| 392 | native_pagetable_setup_done(base); |
| 393 | } |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 394 | #endif /* CONFIG_PARAVIRT */ |
| 395 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 396 | #endif /* __ASSEMBLY__ */ |
| 397 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 398 | #ifdef CONFIG_X86_32 |
| 399 | # include "pgtable_32.h" |
| 400 | #else |
| 401 | # include "pgtable_64.h" |
| 402 | #endif |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 403 | |
Jeremy Fitzhardinge | fb15a9b | 2008-06-25 00:19:06 -0400 | [diff] [blame] | 404 | /* |
| 405 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
| 406 | * |
| 407 | * this macro returns the index of the entry in the pgd page which would |
| 408 | * control the given virtual address |
| 409 | */ |
| 410 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| 411 | |
| 412 | /* |
| 413 | * pgd_offset() returns a (pgd_t *) |
| 414 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
| 415 | */ |
| 416 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
| 417 | /* |
| 418 | * a shortcut which implies the use of the kernel's pgd, instead |
| 419 | * of a process's |
| 420 | */ |
| 421 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
| 422 | |
| 423 | |
Jeremy Fitzhardinge | 68db065 | 2008-03-17 16:37:13 -0700 | [diff] [blame] | 424 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| 425 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| 426 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 427 | #ifndef __ASSEMBLY__ |
| 428 | |
Thomas Gleixner | 30551bb | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 429 | enum { |
| 430 | PG_LEVEL_NONE, |
| 431 | PG_LEVEL_4K, |
| 432 | PG_LEVEL_2M, |
Ingo Molnar | 86f0398 | 2008-01-30 13:34:09 +0100 | [diff] [blame] | 433 | PG_LEVEL_1G, |
Andi Kleen | ce0c0e5 | 2008-05-02 11:46:49 +0200 | [diff] [blame] | 434 | PG_LEVEL_NUM |
Thomas Gleixner | 30551bb | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 435 | }; |
| 436 | |
Thomas Gleixner | 65280e6 | 2008-05-05 16:35:21 +0200 | [diff] [blame] | 437 | #ifdef CONFIG_PROC_FS |
| 438 | extern void update_page_count(int level, unsigned long pages); |
| 439 | #else |
| 440 | static inline void update_page_count(int level, unsigned long pages) { } |
| 441 | #endif |
Andi Kleen | ce0c0e5 | 2008-05-02 11:46:49 +0200 | [diff] [blame] | 442 | |
Thomas Gleixner | 0a66308 | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 443 | /* |
| 444 | * Helper function that returns the kernel pagetable entry controlling |
| 445 | * the virtual address 'address'. NULL means no pagetable entry present. |
| 446 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it |
| 447 | * as a pte too. |
| 448 | */ |
Harvey Harrison | da7bfc5 | 2008-02-09 23:24:08 +0100 | [diff] [blame] | 449 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
Thomas Gleixner | 0a66308 | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 450 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 451 | /* local pte updates need not use xchg for locking */ |
| 452 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
| 453 | { |
| 454 | pte_t res = *ptep; |
| 455 | |
| 456 | /* Pure native function needs no input for mm, addr */ |
| 457 | native_pte_clear(NULL, 0, ptep); |
| 458 | return res; |
| 459 | } |
| 460 | |
| 461 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 462 | pte_t *ptep , pte_t pte) |
| 463 | { |
| 464 | native_set_pte(ptep, pte); |
| 465 | } |
| 466 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 467 | #ifndef CONFIG_PARAVIRT |
| 468 | /* |
| 469 | * Rules for using pte_update - it must be called after any PTE update which |
| 470 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
| 471 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
| 472 | * updates should either be sets, clears, or set_pte_atomic for P->P |
| 473 | * transitions, which means this hook should only be called for user PTEs. |
| 474 | * This hook implies a P->P protection or access change has taken place, which |
| 475 | * requires a subsequent TLB flush. The notification can optionally be delayed |
| 476 | * until the TLB flush event by using the pte_update_defer form of the |
| 477 | * interface, but care must be taken to assure that the flush happens while |
| 478 | * still holding the same page table lock so that the shadow and primary pages |
| 479 | * do not become out of sync on SMP. |
| 480 | */ |
| 481 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 482 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| 483 | #endif |
| 484 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 485 | /* |
| 486 | * We only update the dirty/accessed state if we set |
| 487 | * the dirty bit by hand in the kernel, since the hardware |
| 488 | * will do the accessed bit for us, and we don't want to |
| 489 | * race with other CPU's that might be updating the dirty |
| 490 | * bit at the same time. |
| 491 | */ |
Jeremy Fitzhardinge | bea4180 | 2008-06-25 00:18:57 -0400 | [diff] [blame] | 492 | struct vm_area_struct; |
| 493 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 494 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
Jeremy Fitzhardinge | ee5aa8d | 2008-03-17 16:37:03 -0700 | [diff] [blame] | 495 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| 496 | unsigned long address, pte_t *ptep, |
| 497 | pte_t entry, int dirty); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 498 | |
| 499 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
Jeremy Fitzhardinge | f9fbf1a | 2008-03-17 16:37:04 -0700 | [diff] [blame] | 500 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| 501 | unsigned long addr, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 502 | |
| 503 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
Jeremy Fitzhardinge | c20311e | 2008-03-17 16:37:05 -0700 | [diff] [blame] | 504 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| 505 | unsigned long address, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 506 | |
| 507 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 508 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 509 | pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 510 | { |
| 511 | pte_t pte = native_ptep_get_and_clear(ptep); |
| 512 | pte_update(mm, addr, ptep); |
| 513 | return pte; |
| 514 | } |
| 515 | |
| 516 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 517 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| 518 | unsigned long addr, pte_t *ptep, |
| 519 | int full) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 520 | { |
| 521 | pte_t pte; |
| 522 | if (full) { |
| 523 | /* |
| 524 | * Full address destruction in progress; paravirt does not |
| 525 | * care about updates and native needs no locking |
| 526 | */ |
| 527 | pte = native_local_ptep_get_and_clear(ptep); |
| 528 | } else { |
| 529 | pte = ptep_get_and_clear(mm, addr, ptep); |
| 530 | } |
| 531 | return pte; |
| 532 | } |
| 533 | |
| 534 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 535 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| 536 | unsigned long addr, pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 537 | { |
Jeremy Fitzhardinge | d8d8982 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 538 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 539 | pte_update(mm, addr, ptep); |
| 540 | } |
| 541 | |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 542 | /* |
| 543 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| 544 | * |
| 545 | * dst - pointer to pgd range anwhere on a pgd page |
| 546 | * src - "" |
| 547 | * count - the number of pgds to copy. |
| 548 | * |
| 549 | * dst and src can be on the same page, but the range must not overlap, |
| 550 | * and must not cross a page boundary. |
| 551 | */ |
| 552 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| 553 | { |
| 554 | memcpy(dst, src, count * sizeof(pgd_t)); |
| 555 | } |
| 556 | |
| 557 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 558 | #include <asm-generic/pgtable.h> |
| 559 | #endif /* __ASSEMBLY__ */ |
| 560 | |
Vegard Nossum | 77ef50a | 2008-06-18 17:08:48 +0200 | [diff] [blame] | 561 | #endif /* ASM_X86__PGTABLE_H */ |