[ARM] 3373/1: move uengine loader to arch/arm/common
[linux-2.6/openmoko-kernel/knife-kernel.git] / include / asm-sh / page.h
blob972c3f655b2a01030f78fc720056264361f1af88
1 #ifndef __ASM_SH_PAGE_H
2 #define __ASM_SH_PAGE_H
4 /*
5 * Copyright (C) 1999 Niibe Yutaka
6 */
8 /*
9 [ P0/U0 (virtual) ] 0x00000000 <------ User space
10 [ P1 (fixed) cached ] 0x80000000 <------ Kernel space
11 [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access
12 [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area
13 [ P4 control ] 0xE0000000
16 #include <linux/config.h>
18 /* PAGE_SHIFT determines the page size */
19 #define PAGE_SHIFT 12
20 #define PAGE_SIZE (1UL << PAGE_SHIFT)
21 #define PAGE_MASK (~(PAGE_SIZE-1))
22 #define PTE_MASK PAGE_MASK
24 #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
25 #define HPAGE_SHIFT 16
26 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
27 #define HPAGE_SHIFT 20
28 #endif
30 #ifdef CONFIG_HUGETLB_PAGE
31 #define HPAGE_SIZE (1UL << HPAGE_SHIFT)
32 #define HPAGE_MASK (~(HPAGE_SIZE-1))
33 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
34 #define ARCH_HAS_SETCLEAR_HUGE_PTE
35 #endif
37 #ifdef __KERNEL__
38 #ifndef __ASSEMBLY__
40 extern void (*clear_page)(void *to);
41 extern void (*copy_page)(void *to, void *from);
43 extern void clear_page_slow(void *to);
44 extern void copy_page_slow(void *to, void *from);
46 #if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
47 struct page;
48 extern void clear_user_page(void *to, unsigned long address, struct page *pg);
49 extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
50 extern void __clear_user_page(void *to, void *orig_to);
51 extern void __copy_user_page(void *to, void *from, void *orig_to);
52 #elif defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH3) || !defined(CONFIG_MMU)
53 #define clear_user_page(page, vaddr, pg) clear_page(page)
54 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
55 #elif defined(CONFIG_CPU_SH4)
56 struct page;
57 extern void clear_user_page(void *to, unsigned long address, struct page *pg);
58 extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
59 extern void __clear_user_page(void *to, void *orig_to);
60 extern void __copy_user_page(void *to, void *from, void *orig_to);
61 #endif
64 * These are used to make use of C type-checking..
66 typedef struct { unsigned long pte; } pte_t;
67 typedef struct { unsigned long pmd; } pmd_t;
68 typedef struct { unsigned long pgd; } pgd_t;
69 typedef struct { unsigned long pgprot; } pgprot_t;
71 #define pte_val(x) ((x).pte)
72 #define pmd_val(x) ((x).pmd)
73 #define pgd_val(x) ((x).pgd)
74 #define pgprot_val(x) ((x).pgprot)
76 #define __pte(x) ((pte_t) { (x) } )
77 #define __pmd(x) ((pmd_t) { (x) } )
78 #define __pgd(x) ((pgd_t) { (x) } )
79 #define __pgprot(x) ((pgprot_t) { (x) } )
81 #endif /* !__ASSEMBLY__ */
83 /* to align the pointer to the (next) page boundary */
84 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
87 * IF YOU CHANGE THIS, PLEASE ALSO CHANGE
89 * arch/sh/kernel/vmlinux.lds.S
91 * which has the same constant encoded..
94 #define __MEMORY_START CONFIG_MEMORY_START
95 #define __MEMORY_SIZE CONFIG_MEMORY_SIZE
97 #define PAGE_OFFSET (0x80000000UL)
98 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
99 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
101 #define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
103 #define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
104 #define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
106 /* PFN start number, because of __MEMORY_START */
107 #define PFN_START (__MEMORY_START >> PAGE_SHIFT)
109 #define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START)
110 #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START)
111 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
112 #define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
113 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
115 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
116 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
118 #endif /* __KERNEL__ */
120 #include <asm-generic/page.h>
122 #endif /* __ASM_SH_PAGE_H */