fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc / page.h
blobff57648eb8f89f84fa773c09f399829482545b77
1 /* $Id: page.h,v 1.55 2000/10/30 21:01:41 davem Exp $
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 #ifdef __KERNEL__
13 #ifdef CONFIG_SUN4
14 #define PAGE_SHIFT 13
15 #else
16 #define PAGE_SHIFT 12
17 #endif
18 #ifndef __ASSEMBLY__
19 /* I have my suspicions... -DaveM */
20 #define PAGE_SIZE (1UL << PAGE_SHIFT)
21 #else
22 #define PAGE_SIZE (1 << PAGE_SHIFT)
23 #endif
24 #define PAGE_MASK (~(PAGE_SIZE-1))
26 #include <asm/btfixup.h>
28 #ifndef __ASSEMBLY__
30 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
31 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
32 #define clear_user_page(addr, vaddr, page) \
33 do { clear_page(addr); \
34 sparc_flush_page_to_ram(page); \
35 } while (0)
36 #define copy_user_page(to, from, vaddr, page) \
37 do { copy_page(to, from); \
38 sparc_flush_page_to_ram(page); \
39 } while (0)
41 /* The following structure is used to hold the physical
42 * memory configuration of the machine. This is filled in
43 * probe_memory() and is later used by mem_init() to set up
44 * mem_map[]. We statically allocate SPARC_PHYS_BANKS of
45 * these structs, this is arbitrary. The entry after the
46 * last valid one has num_bytes==0.
49 struct sparc_phys_banks {
50 unsigned long base_addr;
51 unsigned long num_bytes;
54 #define SPARC_PHYS_BANKS 32
56 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
58 /* Cache alias structure. Entry is valid if context != -1. */
59 struct cache_palias {
60 unsigned long vaddr;
61 int context;
64 extern struct cache_palias *sparc_aliases;
66 /* passing structs on the Sparc slow us down tremendously... */
68 /* #define STRICT_MM_TYPECHECKS */
70 #ifdef STRICT_MM_TYPECHECKS
72 * These are used to make use of C type-checking..
74 typedef struct { unsigned long pte; } pte_t;
75 typedef struct { unsigned long iopte; } iopte_t;
76 typedef struct { unsigned long pmdv[16]; } pmd_t;
77 typedef struct { unsigned long pgd; } pgd_t;
78 typedef struct { unsigned long ctxd; } ctxd_t;
79 typedef struct { unsigned long pgprot; } pgprot_t;
80 typedef struct { unsigned long iopgprot; } iopgprot_t;
82 #define pte_val(x) ((x).pte)
83 #define iopte_val(x) ((x).iopte)
84 #define pmd_val(x) ((x).pmdv[0])
85 #define pgd_val(x) ((x).pgd)
86 #define ctxd_val(x) ((x).ctxd)
87 #define pgprot_val(x) ((x).pgprot)
88 #define iopgprot_val(x) ((x).iopgprot)
90 #define __pte(x) ((pte_t) { (x) } )
91 #define __iopte(x) ((iopte_t) { (x) } )
92 /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
93 #define __pgd(x) ((pgd_t) { (x) } )
94 #define __ctxd(x) ((ctxd_t) { (x) } )
95 #define __pgprot(x) ((pgprot_t) { (x) } )
96 #define __iopgprot(x) ((iopgprot_t) { (x) } )
98 #else
100 * .. while these make it easier on the compiler
102 typedef unsigned long pte_t;
103 typedef unsigned long iopte_t;
104 typedef struct { unsigned long pmdv[16]; } pmd_t;
105 typedef unsigned long pgd_t;
106 typedef unsigned long ctxd_t;
107 typedef unsigned long pgprot_t;
108 typedef unsigned long iopgprot_t;
110 #define pte_val(x) (x)
111 #define iopte_val(x) (x)
112 #define pmd_val(x) ((x).pmdv[0])
113 #define pgd_val(x) (x)
114 #define ctxd_val(x) (x)
115 #define pgprot_val(x) (x)
116 #define iopgprot_val(x) (x)
118 #define __pte(x) (x)
119 #define __iopte(x) (x)
120 /* #define __pmd(x) (x) */ /* XXX later */
121 #define __pgd(x) (x)
122 #define __ctxd(x) (x)
123 #define __pgprot(x) (x)
124 #define __iopgprot(x) (x)
126 #endif
128 extern unsigned long sparc_unmapped_base;
130 BTFIXUPDEF_SETHI(sparc_unmapped_base)
132 #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
134 #else /* !(__ASSEMBLY__) */
136 #define __pgprot(x) (x)
138 #endif /* !(__ASSEMBLY__) */
140 /* to align the pointer to the (next) page boundary */
141 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
143 #define PAGE_OFFSET 0xf0000000
144 #ifndef __ASSEMBLY__
145 extern unsigned long phys_base;
146 extern unsigned long pfn_base;
147 #endif
148 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
149 #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
151 #define virt_to_phys __pa
152 #define phys_to_virt __va
154 #define ARCH_PFN_OFFSET (pfn_base)
155 #define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
157 #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
158 #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
160 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
161 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
163 #include <asm-generic/memory_model.h>
164 #include <asm-generic/page.h>
166 #endif /* __KERNEL__ */
168 #endif /* _SPARC_PAGE_H */