tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ASM_SH_PAGE_H
2#define __ASM_SH_PAGE_H
3
4/*
5 * Copyright (C) 1999 Niibe Yutaka
6 */
7
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
14 */
15
16
17/* PAGE_SHIFT determines the page size */
18#define PAGE_SHIFT 12
19#define PAGE_SIZE (1UL << PAGE_SHIFT)
20#define PAGE_MASK (~(PAGE_SIZE-1))
21#define PTE_MASK PAGE_MASK
22
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
27#endif
28
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
34#endif
35
36#ifdef __KERNEL__
37#ifndef __ASSEMBLY__
38
39extern void (*clear_page)(void *to);
40extern void (*copy_page)(void *to, void *from);
41
42extern void clear_page_slow(void *to);
43extern void copy_page_slow(void *to, void *from);
44
45#if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
46struct page;
47extern void clear_user_page(void *to, unsigned long address, struct page *pg);
48extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
49extern void __clear_user_page(void *to, void *orig_to);
50extern 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)
55struct page;
56extern void clear_user_page(void *to, unsigned long address, struct page *pg);
57extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
58extern void __clear_user_page(void *to, void *orig_to);
59extern void __copy_user_page(void *to, void *from, void *orig_to);
60#endif
61
62/*
63 * These are used to make use of C type-checking..
64 */
65typedef struct { unsigned long pte; } pte_t;
66typedef struct { unsigned long pmd; } pmd_t;
67typedef struct { unsigned long pgd; } pgd_t;
68typedef struct { unsigned long pgprot; } pgprot_t;
69
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)
74
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) } )
79
80#endif /* !__ASSEMBLY__ */
81
82/* to align the pointer to the (next) page boundary */
83#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
84
85/*
86 * IF YOU CHANGE THIS, PLEASE ALSO CHANGE
87 *
88 * arch/sh/kernel/vmlinux.lds.S
89 *
90 * which has the same constant encoded..
91 */
92
93#define __MEMORY_START CONFIG_MEMORY_START
94#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
95
96#define PAGE_OFFSET (0x80000000UL)
97#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
98#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
99
100#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
101
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)
104
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)
111
112#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
113 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
114
115#endif /* __KERNEL__ */
116
117#include <asm-generic/memory_model.h>
118#include <asm-generic/page.h>
119
120#endif /* __ASM_SH_PAGE_H */