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 #include <linux/config.h>
9 #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
11 #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
13 #elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
15 #elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
18 #error No page size specified in kernel configuration
21 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
22 #define PAGE_MASK (~(PAGE_SIZE-1))
24 /* Flushing for D-cache alias handling is only needed if
25 * the page size is smaller than 16K.
28 #define DCACHE_ALIASING_POSSIBLE
35 extern void _clear_page(void *page
);
36 #define clear_page(X) _clear_page((void *)(X))
38 extern void clear_user_page(void *addr
, unsigned long vaddr
, struct page
*page
);
39 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
40 extern void copy_user_page(void *to
, void *from
, unsigned long vaddr
, struct page
*topage
);
42 /* Unlike sparc32, sparc64's parameter passing API is more
43 * sane in that structures which as small enough are passed
44 * in registers instead of on the stack. Thus, setting
45 * STRICT_MM_TYPECHECKS does not generate worse code so
46 * let's enable it to get the type checking.
49 #define STRICT_MM_TYPECHECKS
51 #ifdef STRICT_MM_TYPECHECKS
52 /* These are used to make use of C type-checking.. */
53 typedef struct { unsigned long pte
; } pte_t
;
54 typedef struct { unsigned long iopte
; } iopte_t
;
55 typedef struct { unsigned int pmd
; } pmd_t
;
56 typedef struct { unsigned int pgd
; } pgd_t
;
57 typedef struct { unsigned long pgprot
; } pgprot_t
;
59 #define pte_val(x) ((x).pte)
60 #define iopte_val(x) ((x).iopte)
61 #define pmd_val(x) ((x).pmd)
62 #define pgd_val(x) ((x).pgd)
63 #define pgprot_val(x) ((x).pgprot)
65 #define __pte(x) ((pte_t) { (x) } )
66 #define __iopte(x) ((iopte_t) { (x) } )
67 #define __pmd(x) ((pmd_t) { (x) } )
68 #define __pgd(x) ((pgd_t) { (x) } )
69 #define __pgprot(x) ((pgprot_t) { (x) } )
72 /* .. while these make it easier on the compiler */
73 typedef unsigned long pte_t
;
74 typedef unsigned long iopte_t
;
75 typedef unsigned int pmd_t
;
76 typedef unsigned int pgd_t
;
77 typedef unsigned long pgprot_t
;
79 #define pte_val(x) (x)
80 #define iopte_val(x) (x)
81 #define pmd_val(x) (x)
82 #define pgd_val(x) (x)
83 #define pgprot_val(x) (x)
86 #define __iopte(x) (x)
89 #define __pgprot(x) (x)
91 #endif /* (STRICT_MM_TYPECHECKS) */
93 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
94 #define HPAGE_SHIFT 22
95 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
96 #define HPAGE_SHIFT 19
97 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
98 #define HPAGE_SHIFT 16
101 #ifdef CONFIG_HUGETLB_PAGE
102 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
103 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
104 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
105 #define ARCH_HAS_SETCLEAR_HUGE_PTE
106 #define ARCH_HAS_HUGETLB_PREFAULT_HOOK
107 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
110 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
111 (_AC(0x0000000070000000,UL)) : \
112 (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
114 #endif /* !(__ASSEMBLY__) */
116 /* to align the pointer to the (next) page boundary */
117 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
119 /* We used to stick this into a hard-coded global register (%g4)
120 * but that does not make sense anymore.
122 #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
126 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
127 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
129 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
131 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
133 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
135 #define virt_to_phys __pa
136 #define phys_to_virt __va
138 #endif /* !(__ASSEMBLY__) */
140 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
141 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
143 #endif /* !(__KERNEL__) */
145 #include <asm-generic/page.h>
147 #endif /* !(_SPARC64_PAGE_H) */