tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_PAGE_H
2#define _ASM_PAGE_H
3
4#include <asm/virtconvert.h>
5#include <asm/mem-layout.h>
6#include <asm/sections.h>
7#include <asm/setup.h>
8
9#ifndef __ASSEMBLY__
10
11#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
12#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
13
14#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
15#define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE)
16
17/*
18 * These are used to make use of C type-checking..
19 */
20typedef struct { unsigned long pte; } pte_t;
21typedef struct { unsigned long ste[64];} pmd_t;
22typedef struct { pmd_t pue[1]; } pud_t;
23typedef struct { pud_t pge[1]; } pgd_t;
24typedef struct { unsigned long pgprot; } pgprot_t;
25typedef struct page *pgtable_t;
26
27#define pte_val(x) ((x).pte)
28#define pmd_val(x) ((x).ste[0])
29#define pud_val(x) ((x).pue[0])
30#define pgd_val(x) ((x).pge[0])
31#define pgprot_val(x) ((x).pgprot)
32
33#define __pte(x) ((pte_t) { (x) } )
34#define __pmd(x) ((pmd_t) { { (x) } } )
35#define __pud(x) ((pud_t) { (x) } )
36#define __pgd(x) ((pgd_t) { (x) } )
37#define __pgprot(x) ((pgprot_t) { (x) } )
38#define PTE_MASK PAGE_MASK
39
40#define devmem_is_allowed(pfn) 1
41
42#define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr))
43#define __va(paddr) phys_to_virt((unsigned long) (paddr))
44
45#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
46
47extern unsigned long max_low_pfn;
48extern unsigned long min_low_pfn;
49extern unsigned long max_pfn;
50
51#ifdef CONFIG_MMU
52#define pfn_valid(pfn) ((pfn) < max_mapnr)
53#else
54#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
55#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
56
57#endif
58
59#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
60#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
61
62
63#define VM_DATA_DEFAULT_FLAGS \
64 (VM_READ | VM_WRITE | \
65 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
66 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
67
68#endif /* __ASSEMBLY__ */
69
70#include <asm-generic/memory_model.h>
71#include <asm-generic/getorder.h>
72
73#endif /* _ASM_PAGE_H */