fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc64 / page.h
blob7af1077451ffb9d9fd80daf9086109a4ee039482
1 /* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */
3 #ifndef _SPARC64_PAGE_H
4 #define _SPARC64_PAGE_H
6 #ifdef __KERNEL__
8 #include <linux/const.h>
10 #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
11 #define PAGE_SHIFT 13
12 #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
13 #define PAGE_SHIFT 16
14 #elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
15 #define PAGE_SHIFT 19
16 #elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
17 #define PAGE_SHIFT 22
18 #else
19 #error No page size specified in kernel configuration
20 #endif
22 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
23 #define PAGE_MASK (~(PAGE_SIZE-1))
25 /* Flushing for D-cache alias handling is only needed if
26 * the page size is smaller than 16K.
28 #if PAGE_SHIFT < 14
29 #define DCACHE_ALIASING_POSSIBLE
30 #endif
32 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
33 #define HPAGE_SHIFT 22
34 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
35 #define HPAGE_SHIFT 19
36 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
37 #define HPAGE_SHIFT 16
38 #endif
40 #ifdef CONFIG_HUGETLB_PAGE
41 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
42 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
43 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
44 #define ARCH_HAS_SETCLEAR_HUGE_PTE
45 #define ARCH_HAS_HUGETLB_PREFAULT_HOOK
46 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
47 #endif
49 #ifndef __ASSEMBLY__
51 extern void _clear_page(void *page);
52 #define clear_page(X) _clear_page((void *)(X))
53 struct page;
54 extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
55 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
56 extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
58 /* Unlike sparc32, sparc64's parameter passing API is more
59 * sane in that structures which as small enough are passed
60 * in registers instead of on the stack. Thus, setting
61 * STRICT_MM_TYPECHECKS does not generate worse code so
62 * let's enable it to get the type checking.
65 #define STRICT_MM_TYPECHECKS
67 #ifdef STRICT_MM_TYPECHECKS
68 /* These are used to make use of C type-checking.. */
69 typedef struct { unsigned long pte; } pte_t;
70 typedef struct { unsigned long iopte; } iopte_t;
71 typedef struct { unsigned int pmd; } pmd_t;
72 typedef struct { unsigned int pgd; } pgd_t;
73 typedef struct { unsigned long pgprot; } pgprot_t;
75 #define pte_val(x) ((x).pte)
76 #define iopte_val(x) ((x).iopte)
77 #define pmd_val(x) ((x).pmd)
78 #define pgd_val(x) ((x).pgd)
79 #define pgprot_val(x) ((x).pgprot)
81 #define __pte(x) ((pte_t) { (x) } )
82 #define __iopte(x) ((iopte_t) { (x) } )
83 #define __pmd(x) ((pmd_t) { (x) } )
84 #define __pgd(x) ((pgd_t) { (x) } )
85 #define __pgprot(x) ((pgprot_t) { (x) } )
87 #else
88 /* .. while these make it easier on the compiler */
89 typedef unsigned long pte_t;
90 typedef unsigned long iopte_t;
91 typedef unsigned int pmd_t;
92 typedef unsigned int pgd_t;
93 typedef unsigned long pgprot_t;
95 #define pte_val(x) (x)
96 #define iopte_val(x) (x)
97 #define pmd_val(x) (x)
98 #define pgd_val(x) (x)
99 #define pgprot_val(x) (x)
101 #define __pte(x) (x)
102 #define __iopte(x) (x)
103 #define __pmd(x) (x)
104 #define __pgd(x) (x)
105 #define __pgprot(x) (x)
107 #endif /* (STRICT_MM_TYPECHECKS) */
109 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
110 (_AC(0x0000000070000000,UL)) : \
111 (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
113 #include <asm-generic/memory_model.h>
115 #endif /* !(__ASSEMBLY__) */
117 /* to align the pointer to the (next) page boundary */
118 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
120 /* We used to stick this into a hard-coded global register (%g4)
121 * but that does not make sense anymore.
123 #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
125 #ifndef __ASSEMBLY__
127 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
128 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
130 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
132 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
134 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
136 #define virt_to_phys __pa
137 #define phys_to_virt __va
139 #endif /* !(__ASSEMBLY__) */
141 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
142 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
144 #include <asm-generic/page.h>
146 #endif /* __KERNEL__ */
147 #endif /* _SPARC64_PAGE_H */