projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5f97f7f9 HS |
1 | /* |
| 2 | * Copyright (C) 2004-2006 Atmel Corporation | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License version 2 as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | */ | |
| 8 | #ifndef __ASM_AVR32_PAGE_H | |
| 9 | #define __ASM_AVR32_PAGE_H | |
| 10 | ||
| 11 | #ifdef __KERNEL__ | |
| 12 | ||
| 13 | /* PAGE_SHIFT determines the page size */ | |
| 14 | #define PAGE_SHIFT 12 | |
| 15 | #ifdef __ASSEMBLY__ | |
| 16 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
| 17 | #else | |
| 18 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
| 19 | #endif | |
| 20 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
| 21 | #define PTE_MASK PAGE_MASK | |
| 22 | ||
| 23 | #ifndef __ASSEMBLY__ | |
| 24 | ||
| 25 | #include <asm/addrspace.h> | |
| 26 | ||
| 27 | extern void clear_page(void *to); | |
| 28 | extern void copy_page(void *to, void *from); | |
| 29 | ||
| 30 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
| 31 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
| 32 | ||
| 33 | /* | |
| 34 | * These are used to make use of C type-checking.. | |
| 35 | */ | |
| 36 | typedef struct { unsigned long pte; } pte_t; | |
| 37 | typedef struct { unsigned long pgd; } pgd_t; | |
| 38 | typedef struct { unsigned long pgprot; } pgprot_t; | |
| 39 | ||
| 40 | #define pte_val(x) ((x).pte) | |
| 41 | #define pgd_val(x) ((x).pgd) | |
| 42 | #define pgprot_val(x) ((x).pgprot) | |
| 43 | ||
| 44 | #define __pte(x) ((pte_t) { (x) }) | |
| 45 | #define __pgd(x) ((pgd_t) { (x) }) | |
| 46 | #define __pgprot(x) ((pgprot_t) { (x) }) | |
| 47 | ||
| 48 | /* FIXME: These should be removed soon */ | |
| 49 | extern unsigned long memory_start, memory_end; | |
| 50 | ||
| 51 | /* Pure 2^n version of get_order */ | |
| 52 | static inline int get_order(unsigned long size) | |
| 53 | { | |
| 54 | unsigned lz; | |
| 55 | ||
| 56 | size = (size - 1) >> PAGE_SHIFT; | |
| 57 | asm("clz %0, %1" : "=r"(lz) : "r"(size)); | |
| 58 | return 32 - lz; | |
| 59 | } | |
| 60 | ||
| 61 | #endif /* !__ASSEMBLY__ */ | |
| 62 | ||
| 63 | /* Align the pointer to the (next) page boundary */ | |
| 64 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | |
| 65 | ||
| 66 | /* | |
| 67 | * The hardware maps the virtual addresses 0x80000000 -> 0x9fffffff | |
| 68 | * permanently to the physical addresses 0x00000000 -> 0x1fffffff when | |
| 69 | * segmentation is enabled. We want to make use of this in order to | |
| 70 | * minimize TLB pressure. | |
| 71 | */ | |
| 72 | #define PAGE_OFFSET (0x80000000UL) | |
| 73 | ||
| 74 | /* | |
| 75 | * ALSA uses virt_to_page() on DMA pages, which I'm not entirely sure | |
| 76 | * is a good idea. Anyway, we can't simply subtract PAGE_OFFSET here | |
| 77 | * in that case, so we'll have to mask out the three most significant | |
| 78 | * bits of the address instead... | |
| 79 | * | |
| 80 | * What's the difference between __pa() and virt_to_phys() anyway? | |
| 81 | */ | |
| 82 | #define __pa(x) PHYSADDR(x) | |
| 83 | #define __va(x) ((void *)(P1SEGADDR(x))) | |
| 84 | ||
| 85 | #define MAP_NR(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT) | |
| 86 | ||
| 87 | #define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT)) | |
| 88 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | |
| 89 | ||
| 90 | #ifndef CONFIG_NEED_MULTIPLE_NODES | |
| 91 | ||
| 92 | #define PHYS_PFN_OFFSET (CONFIG_PHYS_OFFSET >> PAGE_SHIFT) | |
| 93 | ||
| 94 | #define pfn_to_page(pfn) (mem_map + ((pfn) - PHYS_PFN_OFFSET)) | |
| 95 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PHYS_PFN_OFFSET) | |
| 96 | #define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) | |
| 97 | #endif /* CONFIG_NEED_MULTIPLE_NODES */ | |
| 98 | ||
| 99 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
| 100 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
| 101 | ||
| 102 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ | |
| 103 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
| 104 | ||
| 105 | /* | |
| 106 | * Memory above this physical address will be considered highmem. | |
| 107 | */ | |
| 108 | #define HIGHMEM_START 0x20000000UL | |
| 109 | ||
| 110 | #endif /* __KERNEL__ */ | |
| 111 | ||
| 112 | #endif /* __ASM_AVR32_PAGE_H */ |