1 #ifndef _SPARC64_PAGE_H 2 #define _SPARC64_PAGE_H 3 4 #include <linux/const.h> 5 6 #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) 7 #define PAGE_SHIFT 13 8 #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) 9 #define PAGE_SHIFT 16 10 #else 11 #error No page size specified in kernel configuration 12 #endif 13 14 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 15 #define PAGE_MASK (~(PAGE_SIZE-1)) 16 17 /* Flushing for D-cache alias handling is only needed if 18 * the page size is smaller than 16K. 19 */ 20 #if PAGE_SHIFT < 14 21 #define DCACHE_ALIASING_POSSIBLE 22 #endif 23 24 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) 25 #define HPAGE_SHIFT 22 26 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) 27 #define HPAGE_SHIFT 19 28 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) 29 #define HPAGE_SHIFT 16 30 #endif 31 32 #ifdef CONFIG_HUGETLB_PAGE 33 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 34 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) 35 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 36 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 37 #endif 38 39 #ifndef __ASSEMBLY__ 40 41 extern void _clear_page(void *page); 42 #define clear_page(X) _clear_page((void *)(X)) 43 struct page; 44 extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 45 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 46 extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 47 48 /* Unlike sparc32, sparc64's parameter passing API is more 49 * sane in that structures which as small enough are passed 50 * in registers instead of on the stack. Thus, setting 51 * STRICT_MM_TYPECHECKS does not generate worse code so 52 * let's enable it to get the type checking. 53 */ 54 55 #define STRICT_MM_TYPECHECKS 56 57 #ifdef STRICT_MM_TYPECHECKS 58 /* These are used to make use of C type-checking.. */ 59 typedef struct { unsigned long pte; } pte_t; 60 typedef struct { unsigned long iopte; } iopte_t; 61 typedef struct { unsigned int pmd; } pmd_t; 62 typedef struct { unsigned int pgd; } pgd_t; 63 typedef struct { unsigned long pgprot; } pgprot_t; 64 65 #define pte_val(x) ((x).pte) 66 #define iopte_val(x) ((x).iopte) 67 #define pmd_val(x) ((x).pmd) 68 #define pgd_val(x) ((x).pgd) 69 #define pgprot_val(x) ((x).pgprot) 70 71 #define __pte(x) ((pte_t) { (x) } ) 72 #define __iopte(x) ((iopte_t) { (x) } ) 73 #define __pmd(x) ((pmd_t) { (x) } ) 74 #define __pgd(x) ((pgd_t) { (x) } ) 75 #define __pgprot(x) ((pgprot_t) { (x) } ) 76 77 #else 78 /* .. while these make it easier on the compiler */ 79 typedef unsigned long pte_t; 80 typedef unsigned long iopte_t; 81 typedef unsigned int pmd_t; 82 typedef unsigned int pgd_t; 83 typedef unsigned long pgprot_t; 84 85 #define pte_val(x) (x) 86 #define iopte_val(x) (x) 87 #define pmd_val(x) (x) 88 #define pgd_val(x) (x) 89 #define pgprot_val(x) (x) 90 91 #define __pte(x) (x) 92 #define __iopte(x) (x) 93 #define __pmd(x) (x) 94 #define __pgd(x) (x) 95 #define __pgprot(x) (x) 96 97 #endif /* (STRICT_MM_TYPECHECKS) */ 98 99 typedef struct page *pgtable_t; 100 101 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ 102 (_AC(0x0000000070000000,UL)) : \ 103 (_AC(0xfffff80000000000,UL) + (1UL << 32UL))) 104 105 #include <asm-generic/memory_model.h> 106 107 #endif /* !(__ASSEMBLY__) */ 108 109 /* We used to stick this into a hard-coded global register (%g4) 110 * but that does not make sense anymore. 111 */ 112 #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL) 113 114 #ifndef __ASSEMBLY__ 115 116 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 117 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 118 119 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 120 121 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) 122 123 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 124 125 #define virt_to_phys __pa 126 #define phys_to_virt __va 127 128 #endif /* !(__ASSEMBLY__) */ 129 130 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 131 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 132 133 #include <asm-generic/page.h> 134 135 #endif /* _SPARC64_PAGE_H */ 136