nfsd4: typo logical vs bitwise negate for want_mask
[linux-btrfs-devel.git] / arch / sparc / include / asm / page_32.h
blob156707b0f18d1ba4a5fbd01fc972fbec8c529c0d
1 /*
2 * page.h: Various defines and such for MMU operations on the Sparc for
3 * the Linux kernel.
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
8 #ifndef _SPARC_PAGE_H
9 #define _SPARC_PAGE_H
11 #define PAGE_SHIFT 12
13 #ifndef __ASSEMBLY__
14 /* I have my suspicions... -DaveM */
15 #define PAGE_SIZE (1UL << PAGE_SHIFT)
16 #else
17 #define PAGE_SIZE (1 << PAGE_SHIFT)
18 #endif
19 #define PAGE_MASK (~(PAGE_SIZE-1))
21 #include <asm/btfixup.h>
23 #ifndef __ASSEMBLY__
25 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
26 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
27 #define clear_user_page(addr, vaddr, page) \
28 do { clear_page(addr); \
29 sparc_flush_page_to_ram(page); \
30 } while (0)
31 #define copy_user_page(to, from, vaddr, page) \
32 do { copy_page(to, from); \
33 sparc_flush_page_to_ram(page); \
34 } while (0)
36 /* The following structure is used to hold the physical
37 * memory configuration of the machine. This is filled in
38 * prom_meminit() and is later used by mem_init() to set up
39 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of
40 * these structs, this is arbitrary. The entry after the
41 * last valid one has num_bytes==0.
43 struct sparc_phys_banks {
44 unsigned long base_addr;
45 unsigned long num_bytes;
48 #define SPARC_PHYS_BANKS 32
50 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
52 /* Cache alias structure. Entry is valid if context != -1. */
53 struct cache_palias {
54 unsigned long vaddr;
55 int context;
58 /* passing structs on the Sparc slow us down tremendously... */
60 /* #define STRICT_MM_TYPECHECKS */
62 #ifdef STRICT_MM_TYPECHECKS
64 * These are used to make use of C type-checking..
66 typedef struct { unsigned long pte; } pte_t;
67 typedef struct { unsigned long iopte; } iopte_t;
68 typedef struct { unsigned long pmdv[16]; } pmd_t;
69 typedef struct { unsigned long pgd; } pgd_t;
70 typedef struct { unsigned long ctxd; } ctxd_t;
71 typedef struct { unsigned long pgprot; } pgprot_t;
72 typedef struct { unsigned long iopgprot; } iopgprot_t;
74 #define pte_val(x) ((x).pte)
75 #define iopte_val(x) ((x).iopte)
76 #define pmd_val(x) ((x).pmdv[0])
77 #define pgd_val(x) ((x).pgd)
78 #define ctxd_val(x) ((x).ctxd)
79 #define pgprot_val(x) ((x).pgprot)
80 #define iopgprot_val(x) ((x).iopgprot)
82 #define __pte(x) ((pte_t) { (x) } )
83 #define __iopte(x) ((iopte_t) { (x) } )
84 /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
85 #define __pgd(x) ((pgd_t) { (x) } )
86 #define __ctxd(x) ((ctxd_t) { (x) } )
87 #define __pgprot(x) ((pgprot_t) { (x) } )
88 #define __iopgprot(x) ((iopgprot_t) { (x) } )
90 #else
92 * .. while these make it easier on the compiler
94 typedef unsigned long pte_t;
95 typedef unsigned long iopte_t;
96 typedef struct { unsigned long pmdv[16]; } pmd_t;
97 typedef unsigned long pgd_t;
98 typedef unsigned long ctxd_t;
99 typedef unsigned long pgprot_t;
100 typedef unsigned long iopgprot_t;
102 #define pte_val(x) (x)
103 #define iopte_val(x) (x)
104 #define pmd_val(x) ((x).pmdv[0])
105 #define pgd_val(x) (x)
106 #define ctxd_val(x) (x)
107 #define pgprot_val(x) (x)
108 #define iopgprot_val(x) (x)
110 #define __pte(x) (x)
111 #define __iopte(x) (x)
112 /* #define __pmd(x) (x) */ /* XXX later */
113 #define __pgd(x) (x)
114 #define __ctxd(x) (x)
115 #define __pgprot(x) (x)
116 #define __iopgprot(x) (x)
118 #endif
120 typedef struct page *pgtable_t;
122 extern unsigned long sparc_unmapped_base;
124 BTFIXUPDEF_SETHI(sparc_unmapped_base)
126 #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
128 #else /* !(__ASSEMBLY__) */
130 #define __pgprot(x) (x)
132 #endif /* !(__ASSEMBLY__) */
134 #define PAGE_OFFSET 0xf0000000
135 #ifndef __ASSEMBLY__
136 extern unsigned long phys_base;
137 extern unsigned long pfn_base;
138 #endif
139 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
140 #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
142 #define virt_to_phys __pa
143 #define phys_to_virt __va
145 #define ARCH_PFN_OFFSET (pfn_base)
146 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
148 #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
149 #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
151 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
152 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
154 #include <asm-generic/memory_model.h>
155 #include <asm-generic/getorder.h>
157 #endif /* _SPARC_PAGE_H */