H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_PGTABLE_32_H |
| 2 | #define _ASM_X86_PGTABLE_32_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | |
Jeremy Fitzhardinge | f402a65 | 2009-02-08 18:49:05 -0800 | [diff] [blame] | 4 | #include <asm/pgtable_32_types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | |
| 6 | /* |
| 7 | * The Linux memory management assumes a three-level page table setup. On |
| 8 | * the i386, we use that, but "fold" the mid level into the top-level page |
| 9 | * table, so that we physically have the same two-level page table as the |
| 10 | * i386 mmu expects. |
| 11 | * |
| 12 | * This file contains the functions and defines necessary to modify and use |
| 13 | * the i386 page table tree. |
| 14 | */ |
| 15 | #ifndef __ASSEMBLY__ |
| 16 | #include <asm/processor.h> |
| 17 | #include <asm/fixmap.h> |
| 18 | #include <linux/threads.h> |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 19 | #include <asm/paravirt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Jiri Slaby | 1977f03 | 2007-10-18 23:40:25 -0700 | [diff] [blame] | 21 | #include <linux/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/list.h> |
| 23 | #include <linux/spinlock.h> |
| 24 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 25 | struct mm_struct; |
| 26 | struct vm_area_struct; |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | extern pgd_t swapper_pg_dir[1024]; |
Borislav Petkov | b40827fa | 2010-08-28 15:58:33 +0200 | [diff] [blame] | 29 | extern pgd_t initial_page_table[1024]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Thomas Gleixner | 985a34b | 2008-03-09 13:14:37 +0100 | [diff] [blame] | 31 | static inline void pgtable_cache_init(void) { } |
| 32 | static inline void check_pgt_cache(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | void paging_init(void); |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * Define this if things work differently on an i386 and an i486: |
| 37 | * it will (on an i486) warn about kernel memory accesses that are |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 38 | * done without a 'access_ok(VERIFY_WRITE,..)' |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | */ |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 40 | #undef TEST_ACCESS_OK |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #ifdef CONFIG_X86_PAE |
| 43 | # include <asm/pgtable-3level.h> |
| 44 | #else |
| 45 | # include <asm/pgtable-2level.h> |
| 46 | #endif |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #if defined(CONFIG_HIGHPTE) |
Joe Perches | cf840147 | 2008-03-23 01:03:09 -0700 | [diff] [blame] | 49 | #define pte_offset_map(dir, address) \ |
Peter Zijlstra | ece0e2b | 2010-10-26 14:21:52 -0700 | [diff] [blame] | 50 | ((pte_t *)kmap_atomic(pmd_page(*(dir))) + \ |
Joe Perches | cf840147 | 2008-03-23 01:03:09 -0700 | [diff] [blame] | 51 | pte_index((address))) |
Peter Zijlstra | ece0e2b | 2010-10-26 14:21:52 -0700 | [diff] [blame] | 52 | #define pte_unmap(pte) kunmap_atomic((pte)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #else |
Joe Perches | cf840147 | 2008-03-23 01:03:09 -0700 | [diff] [blame] | 54 | #define pte_offset_map(dir, address) \ |
| 55 | ((pte_t *)page_address(pmd_page(*(dir))) + pte_index((address))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #define pte_unmap(pte) do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #endif |
| 58 | |
Zachary Amsden | 23002d8 | 2006-09-30 23:29:35 -0700 | [diff] [blame] | 59 | /* Clear a kernel PTE and flush it from the TLB */ |
Joe Perches | cf840147 | 2008-03-23 01:03:09 -0700 | [diff] [blame] | 60 | #define kpte_clear_flush(ptep, vaddr) \ |
| 61 | do { \ |
| 62 | pte_clear(&init_mm, (vaddr), (ptep)); \ |
| 63 | __flush_tlb_one((vaddr)); \ |
Zachary Amsden | 23002d8 | 2006-09-30 23:29:35 -0700 | [diff] [blame] | 64 | } while (0) |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #endif /* !__ASSEMBLY__ */ |
| 67 | |
Thomas Gleixner | 4757d7d8 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 68 | /* |
| 69 | * kern_addr_valid() is (1) for FLATMEM and (0) for |
| 70 | * SPARSEMEM and DISCONTIGMEM |
| 71 | */ |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 72 | #ifdef CONFIG_FLATMEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | #define kern_addr_valid(addr) (1) |
Thomas Gleixner | 4757d7d8 | 2008-01-30 13:30:37 +0100 | [diff] [blame] | 74 | #else |
| 75 | #define kern_addr_valid(kaddr) (0) |
| 76 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 78 | #endif /* _ASM_X86_PGTABLE_32_H */ |