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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | #ifndef _ALPHA_PAGE_H #define _ALPHA_PAGE_H /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 13 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #define STRICT_MM_TYPECHECKS /* * A _lot_ of the kernel time is spent clearing pages, so * do this as fast as we possibly can. Also, doing this * as a separate inline function (rather than memset()) * results in clearer kernel profiles as we see _who_ is * doing page clearing or copying. */ static inline void clear_page(void * page) { unsigned long count = PAGE_SIZE/64; unsigned long *ptr = (unsigned long *)page; do { ptr[0] = 0; ptr[1] = 0; ptr[2] = 0; ptr[3] = 0; count--; ptr[4] = 0; ptr[5] = 0; ptr[6] = 0; ptr[7] = 0; ptr += 8; } while (count); } static inline void copy_page(void * _to, void * _from) { unsigned long count = PAGE_SIZE/64; unsigned long *to = (unsigned long *)_to; unsigned long *from = (unsigned long *)_from; do { unsigned long a,b,c,d,e,f,g,h; a = from[0]; b = from[1]; c = from[2]; d = from[3]; e = from[4]; f = from[5]; g = from[6]; h = from[7]; count--; from += 8; to[0] = a; to[1] = b; to[2] = c; to[3] = d; to[4] = e; to[5] = f; to[6] = g; to[7] = h; to += 8; } while (count); } #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking.. */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; typedef unsigned long pmd_t; typedef unsigned long pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pmd_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #endif /* STRICT_MM_TYPECHECKS */ #define BUG() __asm__ __volatile__("call_pal 129 # bugchk") #define PAGE_BUG(page) BUG() #endif /* !ASSEMBLY */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) #ifdef USE_48_BIT_KSEG #define PAGE_OFFSET 0xffff800000000000 #else #define PAGE_OFFSET 0xfffffc0000000000 #endif #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) #define MAP_NR(addr) (__pa(addr) >> PAGE_SHIFT) #endif /* __KERNEL__ */ #endif /* _ALPHA_PAGE_H */ |