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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-sh/page.h
1 #ifndef __ASM_SH_PAGE_H
2 #define __ASM_SH_PAGE_H
5 * Copyright (C) 1999 Niibe Yutaka
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
17 /* PAGE_SHIFT determines the page size */
19 #define PAGE_SIZE (1UL << PAGE_SHIFT)
20 #define PAGE_MASK (~(PAGE_SIZE-1))
21 #define PTE_MASK PAGE_MASK
23 #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
24 #define HPAGE_SHIFT 16
25 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
26 #define HPAGE_SHIFT 20
29 #ifdef CONFIG_HUGETLB_PAGE
30 #define HPAGE_SIZE (1UL << HPAGE_SHIFT)
31 #define HPAGE_MASK (~(HPAGE_SIZE-1))
32 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
33 #define ARCH_HAS_SETCLEAR_HUGE_PTE
39 extern void (*clear_page
)(void *to
);
40 extern void (*copy_page
)(void *to
, void *from
);
42 extern void clear_page_slow(void *to
);
43 extern void copy_page_slow(void *to
, void *from
);
45 #if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
47 extern void clear_user_page(void *to
, unsigned long address
, struct page
*pg
);
48 extern void copy_user_page(void *to
, void *from
, unsigned long address
, struct page
*pg
);
49 extern void __clear_user_page(void *to
, void *orig_to
);
50 extern void __copy_user_page(void *to
, void *from
, void *orig_to
);
51 #elif defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH3) || !defined(CONFIG_MMU)
52 #define clear_user_page(page, vaddr, pg) clear_page(page)
53 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
54 #elif defined(CONFIG_CPU_SH4)
56 extern void clear_user_page(void *to
, unsigned long address
, struct page
*pg
);
57 extern void copy_user_page(void *to
, void *from
, unsigned long address
, struct page
*pg
);
58 extern void __clear_user_page(void *to
, void *orig_to
);
59 extern void __copy_user_page(void *to
, void *from
, void *orig_to
);
63 * These are used to make use of C type-checking..
65 typedef struct { unsigned long pte
; } pte_t
;
66 typedef struct { unsigned long pmd
; } pmd_t
;
67 typedef struct { unsigned long pgd
; } pgd_t
;
68 typedef struct { unsigned long pgprot
; } pgprot_t
;
70 #define pte_val(x) ((x).pte)
71 #define pmd_val(x) ((x).pmd)
72 #define pgd_val(x) ((x).pgd)
73 #define pgprot_val(x) ((x).pgprot)
75 #define __pte(x) ((pte_t) { (x) } )
76 #define __pmd(x) ((pmd_t) { (x) } )
77 #define __pgd(x) ((pgd_t) { (x) } )
78 #define __pgprot(x) ((pgprot_t) { (x) } )
80 #endif /* !__ASSEMBLY__ */
82 /* to align the pointer to the (next) page boundary */
83 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
86 * IF YOU CHANGE THIS, PLEASE ALSO CHANGE
88 * arch/sh/kernel/vmlinux.lds.S
90 * which has the same constant encoded..
93 #define __MEMORY_START CONFIG_MEMORY_START
94 #define __MEMORY_SIZE CONFIG_MEMORY_SIZE
96 #define PAGE_OFFSET (0x80000000UL)
97 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
98 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
100 #define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
102 #define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
103 #define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
105 /* PFN start number, because of __MEMORY_START */
106 #define PFN_START (__MEMORY_START >> PAGE_SHIFT)
107 #define ARCH_PFN_OFFSET (FPN_START)
108 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
109 #define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
110 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
112 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
113 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
115 #endif /* __KERNEL__ */
117 #include <asm-generic/memory_model.h>
118 #include <asm-generic/page.h>
120 #endif /* __ASM_SH_PAGE_H */