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 23 19 #define REAL_HPAGE_SHIFT 22 20 21 #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT) 22 23 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 24 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 25 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) 26 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 27 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 28 #endif 29 30 #ifndef __ASSEMBLY__ 31 32 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 33 struct pt_regs; 34 extern void hugetlb_setup(struct pt_regs *regs); 35 #endif 36 37 #define WANT_PAGE_VIRTUAL 38 39 extern void _clear_page(void *page); 40 #define clear_page(X) _clear_page((void *)(X)) 41 struct page; 42 extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 43 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 44 extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 45 46 /* Unlike sparc32, sparc64's parameter passing API is more 47 * sane in that structures which as small enough are passed 48 * in registers instead of on the stack. Thus, setting 49 * STRICT_MM_TYPECHECKS does not generate worse code so 50 * let's enable it to get the type checking. 51 */ 52 53 #define STRICT_MM_TYPECHECKS 54 55 #ifdef STRICT_MM_TYPECHECKS 56 /* These are used to make use of C type-checking.. */ 57 typedef struct { unsigned long pte; } pte_t; 58 typedef struct { unsigned long iopte; } iopte_t; 59 typedef struct { unsigned long pmd; } pmd_t; 60 typedef struct { unsigned long pgd; } pgd_t; 61 typedef struct { unsigned long pgprot; } pgprot_t; 62 63 #define pte_val(x) ((x).pte) 64 #define iopte_val(x) ((x).iopte) 65 #define pmd_val(x) ((x).pmd) 66 #define pgd_val(x) ((x).pgd) 67 #define pgprot_val(x) ((x).pgprot) 68 69 #define __pte(x) ((pte_t) { (x) } ) 70 #define __iopte(x) ((iopte_t) { (x) } ) 71 #define __pmd(x) ((pmd_t) { (x) } ) 72 #define __pgd(x) ((pgd_t) { (x) } ) 73 #define __pgprot(x) ((pgprot_t) { (x) } ) 74 75 #else 76 /* .. while these make it easier on the compiler */ 77 typedef unsigned long pte_t; 78 typedef unsigned long iopte_t; 79 typedef unsigned long pmd_t; 80 typedef unsigned long pgd_t; 81 typedef unsigned long pgprot_t; 82 83 #define pte_val(x) (x) 84 #define iopte_val(x) (x) 85 #define pmd_val(x) (x) 86 #define pgd_val(x) (x) 87 #define pgprot_val(x) (x) 88 89 #define __pte(x) (x) 90 #define __iopte(x) (x) 91 #define __pmd(x) (x) 92 #define __pgd(x) (x) 93 #define __pgprot(x) (x) 94 95 #endif /* (STRICT_MM_TYPECHECKS) */ 96 97 typedef pte_t *pgtable_t; 98 99 /* These two values define the virtual address space range in which we 100 * must forbid 64-bit user processes from making mappings. It used to 101 * represent precisely the virtual address space hole present in most 102 * early sparc64 chips including UltraSPARC-I. But now it also is 103 * further constrained by the limits of our page tables, which is 104 * 43-bits of virtual address. 105 */ 106 #define SPARC64_VA_HOLE_TOP _AC(0xfffffc0000000000,UL) 107 #define SPARC64_VA_HOLE_BOTTOM _AC(0x0000040000000000,UL) 108 109 /* The next two defines specify the actual exclusion region we 110 * enforce, wherein we use a 4GB red zone on each side of the VA hole. 111 */ 112 #define VA_EXCLUDE_START (SPARC64_VA_HOLE_BOTTOM - (1UL << 32UL)) 113 #define VA_EXCLUDE_END (SPARC64_VA_HOLE_TOP + (1UL << 32UL)) 114 115 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ 116 _AC(0x0000000070000000,UL) : \ 117 VA_EXCLUDE_END) 118 119 #include <asm-generic/memory_model.h> 120 121 #define PAGE_OFFSET_BY_BITS(X) (-(_AC(1,UL) << (X))) 122 extern unsigned long PAGE_OFFSET; 123 124 #endif /* !(__ASSEMBLY__) */ 125 126 /* The maximum number of physical memory address bits we support, this 127 * is used to size various tables used to manage kernel TLB misses and 128 * also the sparsemem code. 129 */ 130 #define MAX_PHYS_ADDRESS_BITS 47 131 132 /* These two shift counts are used when indexing sparc64_valid_addr_bitmap 133 * and kpte_linear_bitmap. 134 */ 135 #define ILOG2_4MB 22 136 #define ILOG2_256MB 28 137 138 #ifndef __ASSEMBLY__ 139 140 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 141 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 142 143 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 144 145 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) 146 147 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 148 149 #define virt_to_phys __pa 150 #define phys_to_virt __va 151 152 #endif /* !(__ASSEMBLY__) */ 153 154 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 155 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 156 157 #include <asm-generic/getorder.h> 158 159 #endif /* _SPARC64_PAGE_H */ 160