Jeremy Fitzhardinge | 83a5101 | 2008-01-30 13:32:41 +0100 | [diff] [blame^] | 1 | #ifndef _ASM_X86_PAGE_H |
| 2 | #define _ASM_X86_PAGE_H |
| 3 | |
| 4 | #include <linux/const.h> |
| 5 | |
| 6 | /* PAGE_SHIFT determines the page size */ |
| 7 | #define PAGE_SHIFT 12 |
| 8 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
| 9 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
| 10 | |
| 11 | #define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK) |
| 12 | |
| 13 | #define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT) |
| 14 | #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) |
| 15 | |
| 16 | #define HPAGE_SHIFT PMD_SHIFT |
| 17 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) |
| 18 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) |
| 19 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) |
| 20 | |
| 21 | /* to align the pointer to the (next) page boundary */ |
| 22 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| 23 | |
| 24 | #define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1) |
| 25 | #define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1) |
| 26 | |
| 27 | |
| 28 | #ifdef CONFIG_X86_64 |
| 29 | #define THREAD_ORDER 1 |
| 30 | #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) |
| 31 | #define CURRENT_MASK (~(THREAD_SIZE-1)) |
| 32 | |
| 33 | #define EXCEPTION_STACK_ORDER 0 |
| 34 | #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) |
| 35 | |
| 36 | #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) |
| 37 | #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) |
| 38 | |
| 39 | #define IRQSTACK_ORDER 2 |
| 40 | #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER) |
| 41 | |
| 42 | #define STACKFAULT_STACK 1 |
| 43 | #define DOUBLEFAULT_STACK 2 |
| 44 | #define NMI_STACK 3 |
| 45 | #define DEBUG_STACK 4 |
| 46 | #define MCE_STACK 5 |
| 47 | #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ |
| 48 | |
| 49 | #define __PAGE_OFFSET _AC(0xffff810000000000, UL) |
| 50 | |
| 51 | #define __PHYSICAL_START CONFIG_PHYSICAL_START |
| 52 | #define __KERNEL_ALIGN 0x200000 |
| 53 | |
| 54 | /* |
| 55 | * Make sure kernel is aligned to 2MB address. Catching it at compile |
| 56 | * time is better. Change your config file and compile the kernel |
| 57 | * for a 2MB aligned address (CONFIG_PHYSICAL_START) |
| 58 | */ |
| 59 | #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0 |
| 60 | #error "CONFIG_PHYSICAL_START must be a multiple of 2MB" |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 61 | #endif |
Jeremy Fitzhardinge | 83a5101 | 2008-01-30 13:32:41 +0100 | [diff] [blame^] | 62 | |
| 63 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) |
| 64 | #define __START_KERNEL_map _AC(0xffffffff80000000, UL) |
| 65 | |
| 66 | /* See Documentation/x86_64/mm.txt for a description of the memory map. */ |
| 67 | #define __PHYSICAL_MASK_SHIFT 46 |
| 68 | #define __VIRTUAL_MASK_SHIFT 48 |
| 69 | |
| 70 | #define KERNEL_TEXT_SIZE (40*1024*1024) |
| 71 | #define KERNEL_TEXT_START _AC(0xffffffff80000000, UL) |
| 72 | |
| 73 | #endif /* CONFIG_X86_64 */ |
| 74 | |
| 75 | #ifdef CONFIG_X86_32 |
| 76 | |
| 77 | /* |
| 78 | * This handles the memory map. |
| 79 | * |
| 80 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has |
| 81 | * a virtual address space of one gigabyte, which limits the |
| 82 | * amount of physical memory you can use to about 950MB. |
| 83 | * |
| 84 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G |
| 85 | * and CONFIG_HIGHMEM64G options in the kernel configuration. |
| 86 | */ |
| 87 | #define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) |
| 88 | |
| 89 | #ifdef CONFIG_X86_PAE |
| 90 | #define __PHYSICAL_MASK_SHIFT 36 |
| 91 | #define __VIRTUAL_MASK_SHIFT 32 |
| 92 | #else /* !CONFIG_X86_PAE */ |
| 93 | #define __PHYSICAL_MASK_SHIFT 32 |
| 94 | #define __VIRTUAL_MASK_SHIFT 32 |
| 95 | #endif /* CONFIG_X86_PAE */ |
| 96 | |
| 97 | #ifdef CONFIG_HUGETLB_PAGE |
| 98 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
| 99 | #endif |
| 100 | |
| 101 | #endif /* CONFIG_X86_32 */ |
| 102 | |
| 103 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) |
| 104 | |
| 105 | #define VM_DATA_DEFAULT_FLAGS \ |
| 106 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ |
| 107 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 108 | |
| 109 | |
| 110 | #ifdef CONFIG_X86_32 |
| 111 | # include "page_32.h" |
| 112 | #else |
| 113 | # include "page_64.h" |
| 114 | #endif |
| 115 | |
| 116 | #endif /* _ASM_X86_PAGE_H */ |