1 /*
2 * linux/include/asm-arm/pgtable-nommu.h
3 *
4 * Copyright (C) 1995-2002 Russell King
5 * Copyright (C) 2004 Hyok S. Choi
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #ifndef _ASMARM_PGTABLE_NOMMU_H
12 #define _ASMARM_PGTABLE_NOMMU_H
13
14 #ifndef __ASSEMBLY__
15
16 #include <linux/slab.h>
17 #include <asm/processor.h>
18 #include <asm/page.h>
19 #include <asm/io.h>
20
21 /*
22 * Trivial page table functions.
23 */
24 #define pgd_present(pgd) (1)
25 #define pgd_none(pgd) (0)
26 #define pgd_bad(pgd) (0)
27 #define pgd_clear(pgdp)
28 #define kern_addr_valid(addr) (1)
29 #define pmd_offset(a, b) ((void *)0)
30 /* FIXME */
31 /*
32 * PMD_SHIFT determines the size of the area a second-level page table can map
33 * PGDIR_SHIFT determines what a third-level page table entry can map
34 */
35 #define PGDIR_SHIFT 21
36
37 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
38 #define PGDIR_MASK (~(PGDIR_SIZE-1))
39 /* FIXME */
40
41 #define PAGE_NONE __pgprot(0)
42 #define PAGE_SHARED __pgprot(0)
43 #define PAGE_COPY __pgprot(0)
44 #define PAGE_READONLY __pgprot(0)
45 #define PAGE_KERNEL __pgprot(0)
46
47 #define swapper_pg_dir ((pgd_t *) 0)
48
49 #define __swp_type(x) (0)
50 #define __swp_offset(x) (0)
51 #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
52 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
53 #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
54
55
56 typedef pte_t *pte_addr_t;
57
58 static inline int pte_file(pte_t pte) { return 0; }
59
60 /*
61 * ZERO_PAGE is a global shared page that is always zero: used
62 * for zero-mapped memory areas etc..
63 */
64 #define ZERO_PAGE(vaddr) (virt_to_page(0))
65
66 /*
67 * Mark the prot value as uncacheable and unbufferable.
68 */
69 #define pgprot_noncached(prot) __pgprot(0)
70 #define pgprot_writecombine(prot) __pgprot(0)
71
72
73 /*
74 * These would be in other places but having them here reduces the diffs.
75 */
76 extern unsigned int kobjsize(const void *objp);
77
78 /*
79 * No page table caches to initialise.
80 */
81 #define pgtable_cache_init() do { } while (0)
82 #define io_remap_page_range remap_page_range
83 #define io_remap_pfn_range remap_pfn_range
84
85
86 /*
87 * All 32bit addresses are effectively valid for vmalloc...
88 * Sort of meaningless for non-VM targets.
89 */
90 #define VMALLOC_START 0
91 #define VMALLOC_END 0xffffffff
92
93 #define FIRST_USER_ADDRESS (0)
94
95 #include <asm-generic/pgtable.h>
96
97 #else
98
99 /*
100 * dummy tlb and user structures.
101 */
102 #define v3_tlb_fns (0)
103 #define v4_tlb_fns (0)
104 #define v4wb_tlb_fns (0)
105 #define v4wbi_tlb_fns (0)
106 #define v6wbi_tlb_fns (0)
107 #define v7wbi_tlb_fns (0)
108
109 #define v3_user_fns (0)
110 #define v4_user_fns (0)
111 #define v4_mc_user_fns (0)
112 #define v4wb_user_fns (0)
113 #define v4wt_user_fns (0)
114 #define v6_user_fns (0)
115 #define xscale_mc_user_fns (0)
116
117 #endif /*__ASSEMBLY__*/
118
119 #endif /* _ASMARM_PGTABLE_H */
120
|
This page was automatically generated by the
LXR engine.
|