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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/asm-um/page.h
2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL
12 #include <linux/config.h>
13 #include <asm/vm-flags.h>
15 /* PAGE_SHIFT determines the page size */
17 #define PAGE_SIZE (1UL << PAGE_SHIFT)
18 #define PAGE_MASK (~(PAGE_SIZE-1))
21 * These are used to make use of C type-checking..
24 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
25 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
27 #define clear_user_page(page, vaddr, pg) clear_page(page)
28 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
30 #if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
32 typedef struct { unsigned long pte_low
, pte_high
; } pte_t
;
33 typedef struct { unsigned long long pmd
; } pmd_t
;
34 typedef struct { unsigned long pgd
; } pgd_t
;
35 #define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))
37 #define pte_get_bits(pte, bits) ((pte).pte_low & (bits))
38 #define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))
39 #define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))
40 #define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \
42 (to).pte_low = (from).pte_low; })
43 #define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)
44 #define pte_set_val(pte, phys, prot) \
45 ({ (pte).pte_high = (phys) >> 32; \
46 (pte).pte_low = (phys) | pgprot_val(prot); })
48 typedef unsigned long long pfn_t
;
49 typedef unsigned long long phys_t
;
53 typedef struct { unsigned long pte
; } pte_t
;
54 typedef struct { unsigned long pgd
; } pgd_t
;
56 #ifdef CONFIG_3_LEVEL_PGTABLES
57 typedef struct { unsigned long pmd
; } pmd_t
;
58 #define pmd_val(x) ((x).pmd)
59 #define __pmd(x) ((pmd_t) { (x) } )
62 #define pte_val(x) ((x).pte)
65 #define pte_get_bits(p, bits) ((p).pte & (bits))
66 #define pte_set_bits(p, bits) ((p).pte |= (bits))
67 #define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
68 #define pte_copy(to, from) ((to).pte = (from).pte)
69 #define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
70 #define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
72 typedef unsigned long pfn_t
;
73 typedef unsigned long phys_t
;
77 typedef struct { unsigned long pgprot
; } pgprot_t
;
79 #define pgd_val(x) ((x).pgd)
80 #define pgprot_val(x) ((x).pgprot)
82 #define __pte(x) ((pte_t) { (x) } )
83 #define __pgd(x) ((pgd_t) { (x) } )
84 #define __pgprot(x) ((pgprot_t) { (x) } )
86 /* to align the pointer to the (next) page boundary */
87 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
89 extern unsigned long uml_physmem
;
91 #define PAGE_OFFSET (uml_physmem)
92 #define KERNELBASE PAGE_OFFSET
94 #define __va_space (8*1024*1024)
96 extern unsigned long to_phys(void *virt
);
97 extern void *to_virt(unsigned long phys
);
98 #define __pa(virt) to_phys((void *) virt)
99 #define __va(phys) to_virt((unsigned long) phys)
101 #define page_to_pfn(page) ((page) - mem_map)
102 #define pfn_to_page(pfn) (mem_map + (pfn))
104 #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
105 #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
107 #define pfn_valid(pfn) ((pfn) < max_mapnr)
108 #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
110 /* Pure 2^n version of get_order */
111 static __inline__
int get_order(unsigned long size
)
115 size
= (size
-1) >> (PAGE_SHIFT
-1);
124 extern struct page
*arch_validate(struct page
*page
, int mask
, int order
);
125 #define HAVE_ARCH_VALIDATE
127 extern void arch_free_page(struct page
*page
, int order
);
128 #define HAVE_ARCH_FREE_PAGE