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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-m32r/page.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-m32r/page.h')
-rw-r--r--include/asm-m32r/page.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/include/asm-m32r/page.h b/include/asm-m32r/page.h
new file mode 100644
index 000000000000..1c6abb9f3f1f
--- /dev/null
+++ b/include/asm-m32r/page.h
@@ -0,0 +1,115 @@
1#ifndef _ASM_M32R_PAGE_H
2#define _ASM_M32R_PAGE_H
3
4#include <linux/config.h>
5
6/* PAGE_SHIFT determines the page size */
7#define PAGE_SHIFT 12
8#define PAGE_SIZE (1UL << PAGE_SHIFT)
9#define PAGE_MASK (~(PAGE_SIZE-1))
10
11#ifdef __KERNEL__
12#ifndef __ASSEMBLY__
13
14extern void clear_page(void *to);
15extern void copy_page(void *to, void *from);
16
17#define clear_user_page(page, vaddr, pg) clear_page(page)
18#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
19
20#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
21#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
22
23/*
24 * These are used to make use of C type-checking..
25 */
26typedef struct { unsigned long pte; } pte_t;
27typedef struct { unsigned long pmd; } pmd_t;
28typedef struct { unsigned long pgd; } pgd_t;
29#define pte_val(x) ((x).pte)
30#define PTE_MASK PAGE_MASK
31
32typedef struct { unsigned long pgprot; } pgprot_t;
33
34#define pmd_val(x) ((x).pmd)
35#define pgd_val(x) ((x).pgd)
36#define pgprot_val(x) ((x).pgprot)
37
38#define __pte(x) ((pte_t) { (x) } )
39#define __pmd(x) ((pmd_t) { (x) } )
40#define __pgd(x) ((pgd_t) { (x) } )
41#define __pgprot(x) ((pgprot_t) { (x) } )
42
43#endif /* !__ASSEMBLY__ */
44
45/* to align the pointer to the (next) page boundary */
46#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
47
48/*
49 * This handles the memory map.. We could make this a config
50 * option, but too many people screw it up, and too few need
51 * it.
52 *
53 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
54 * a virtual address space of one gigabyte, which limits the
55 * amount of physical memory you can use to about 950MB.
56 *
57 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
58 * and CONFIG_HIGHMEM64G options in the kernel configuration.
59 */
60
61
62/* This handles the memory map.. */
63
64#ifndef __ASSEMBLY__
65
66/* Pure 2^n version of get_order */
67static __inline__ int get_order(unsigned long size)
68{
69 int order;
70
71 size = (size - 1) >> (PAGE_SHIFT - 1);
72 order = -1;
73 do {
74 size >>= 1;
75 order++;
76 } while (size);
77
78 return order;
79}
80
81#endif /* __ASSEMBLY__ */
82
83#define __MEMORY_START CONFIG_MEMORY_START
84#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
85
86#ifdef CONFIG_MMU
87#define __PAGE_OFFSET (0x80000000)
88#else
89#define __PAGE_OFFSET (0x00000000)
90#endif
91
92#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
93#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
94#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
95
96#ifndef CONFIG_DISCONTIGMEM
97#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
98#define pfn_to_page(pfn) (mem_map + ((pfn) - PFN_BASE))
99#define page_to_pfn(page) \
100 ((unsigned long)((page) - mem_map) + PFN_BASE)
101#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
102#endif /* !CONFIG_DISCONTIGMEM */
103
104#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
105#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
106
107#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
108 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
109
110#define devmem_is_allowed(x) 1
111
112#endif /* __KERNEL__ */
113
114#endif /* _ASM_M32R_PAGE_H */
115