1 #ifndef _SPARC64_PAGE_H 2 #define _SPARC64_PAGE_H 3 4 #include <linux/const.h> 5 6 #define PAGE_SHIFT 13 7 8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 9 #define PAGE_MASK (~(PAGE_SIZE-1)) 10 11 /* Flushing for D-cache alias handling is only needed if 12 * the page size is smaller than 16K. 13 */ 14 #if PAGE_SHIFT < 14 15 #define DCACHE_ALIASING_POSSIBLE 16 #endif 17 18 #define HPAGE_SHIFT 22 19 20 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 21 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 22 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) 23 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 24 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 25 #endif 26 27 #ifndef __ASSEMBLY__ 28 29 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 30 struct pt_regs; 31 extern void hugetlb_setup(struct pt_regs *regs); 32 #endif 33 34 #define WANT_PAGE_VIRTUAL 35 36 extern void _clear_page(void *page); 37 #define clear_page(X) _clear_page((void *)(X)) 38 struct page; 39 extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 40 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 41 extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 42 43 /* Unlike sparc32, sparc64's parameter passing API is more 44 * sane in that structures which as small enough are passed 45 * in registers instead of on the stack. Thus, setting 46 * STRICT_MM_TYPECHECKS does not generate worse code so 47 * let's enable it to get the type checking. 48 */ 49 50 #define STRICT_MM_TYPECHECKS 51 52 #ifdef STRICT_MM_TYPECHECKS 53 /* These are used to make use of C type-checking.. */ 54 typedef struct { unsigned long pte; } pte_t; 55 typedef struct { unsigned long iopte; } iopte_t; 56 typedef struct { unsigned int pmd; } pmd_t; 57 typedef struct { unsigned int pgd; } pgd_t; 58 typedef struct { unsigned long pgprot; } pgprot_t; 59 60 #define pte_val(x) ((x).pte) 61 #define iopte_val(x) ((x).iopte) 62 #define pmd_val(x) ((x).pmd) 63 #define pgd_val(x) ((x).pgd) 64 #define pgprot_val(x) ((x).pgprot) 65 66 #define __pte(x) ((pte_t) { (x) } ) 67 #define __iopte(x) ((iopte_t) { (x) } ) 68 #define __pmd(x) ((pmd_t) { (x) } ) 69 #define __pgd(x) ((pgd_t) { (x) } ) 70 #define __pgprot(x) ((pgprot_t) { (x) } ) 71 72 #else 73 /* .. while these make it easier on the compiler */ 74 typedef unsigned long pte_t; 75 typedef unsigned long iopte_t; 76 typedef unsigned int pmd_t; 77 typedef unsigned int pgd_t; 78 typedef unsigned long pgprot_t; 79 80 #define pte_val(x) (x) 81 #define iopte_val(x) (x) 82 #define pmd_val(x) (x) 83 #define pgd_val(x) (x) 84 #define pgprot_val(x) (x) 85 86 #define __pte(x) (x) 87 #define __iopte(x) (x) 88 #define __pmd(x) (x) 89 #define __pgd(x) (x) 90 #define __pgprot(x) (x) 91 92 #endif /* (STRICT_MM_TYPECHECKS) */ 93 94 typedef pte_t *pgtable_t; 95 96 /* These two values define the virtual address space range in which we 97 * must forbid 64-bit user processes from making mappings. It 98 * represents the virtual address space hole present in most early 99 * sparc64 chips including UltraSPARC-I. The next two defines specify 100 * the actual exclusion region we enforce, wherein we use a 4GB red 101 * zone on each side of the VA hole. 102 */ 103 #define SPARC64_VA_HOLE_TOP _AC(0xfffff80000000000,UL) 104 #define SPARC64_VA_HOLE_BOTTOM _AC(0x0000080000000000,UL) 105 106 #define VA_EXCLUDE_START (SPARC64_VA_HOLE_BOTTOM - (1UL << 32UL)) 107 #define VA_EXCLUDE_END (SPARC64_VA_HOLE_TOP + (1UL << 32UL)) 108 109 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ 110 _AC(0x0000000070000000,UL) : \ 111 VA_EXCLUDE_END) 112 113 #include <asm-generic/memory_model.h> 114 115 #endif /* !(__ASSEMBLY__) */ 116 117 /* We used to stick this into a hard-coded global register (%g4) 118 * but that does not make sense anymore. 119 */ 120 #define MAX_SUPPORTED_PA_BITS 43 121 #define PAGE_OFFSET_BY_BITS(X) (-(_AC(1,UL) << (X))) 122 #define PAGE_OFFSET PAGE_OFFSET_BY_BITS(MAX_SUPPORTED_PA_BITS) 123 124 #ifndef __ASSEMBLY__ 125 126 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 127 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 128 129 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 130 131 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) 132 133 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 134 135 #define virt_to_phys __pa 136 #define phys_to_virt __va 137 138 #endif /* !(__ASSEMBLY__) */ 139 140 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 141 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 142 143 #include <asm-generic/getorder.h> 144 145 #endif /* _SPARC64_PAGE_H */ 146