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 #define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT)) 29 #endif 30 31 #ifndef __ASSEMBLY__ 32 33 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 34 struct pt_regs; 35 void hugetlb_setup(struct pt_regs *regs); 36 #endif 37 38 #define WANT_PAGE_VIRTUAL 39 40 void _clear_page(void *page); 41 #define clear_page(X) _clear_page((void *)(X)) 42 struct page; 43 void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 44 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 45 void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 46 47 /* Unlike sparc32, sparc64's parameter passing API is more 48 * sane in that structures which as small enough are passed 49 * in registers instead of on the stack. Thus, setting 50 * STRICT_MM_TYPECHECKS does not generate worse code so 51 * let's enable it to get the type checking. 52 */ 53 54 #define STRICT_MM_TYPECHECKS 55 56 #ifdef STRICT_MM_TYPECHECKS 57 /* These are used to make use of C type-checking.. */ 58 typedef struct { unsigned long pte; } pte_t; 59 typedef struct { unsigned long iopte; } iopte_t; 60 typedef struct { unsigned long pmd; } pmd_t; 61 typedef struct { unsigned long pud; } pud_t; 62 typedef struct { unsigned long 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 pud_val(x) ((x).pud) 69 #define pgd_val(x) ((x).pgd) 70 #define pgprot_val(x) ((x).pgprot) 71 72 #define __pte(x) ((pte_t) { (x) } ) 73 #define __iopte(x) ((iopte_t) { (x) } ) 74 #define __pmd(x) ((pmd_t) { (x) } ) 75 #define __pud(x) ((pud_t) { (x) } ) 76 #define __pgd(x) ((pgd_t) { (x) } ) 77 #define __pgprot(x) ((pgprot_t) { (x) } ) 78 79 #else 80 /* .. while these make it easier on the compiler */ 81 typedef unsigned long pte_t; 82 typedef unsigned long iopte_t; 83 typedef unsigned long pmd_t; 84 typedef unsigned long pud_t; 85 typedef unsigned long pgd_t; 86 typedef unsigned long pgprot_t; 87 88 #define pte_val(x) (x) 89 #define iopte_val(x) (x) 90 #define pmd_val(x) (x) 91 #define pud_val(x) (x) 92 #define pgd_val(x) (x) 93 #define pgprot_val(x) (x) 94 95 #define __pte(x) (x) 96 #define __iopte(x) (x) 97 #define __pmd(x) (x) 98 #define __pud(x) (x) 99 #define __pgd(x) (x) 100 #define __pgprot(x) (x) 101 102 #endif /* (STRICT_MM_TYPECHECKS) */ 103 104 typedef pte_t *pgtable_t; 105 106 extern unsigned long sparc64_va_hole_top; 107 extern unsigned long sparc64_va_hole_bottom; 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 extern unsigned long PAGE_OFFSET; 122 123 #endif /* !(__ASSEMBLY__) */ 124 125 /* The maximum number of physical memory address bits we support. The 126 * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS" 127 * evaluates to. 128 */ 129 #define MAX_PHYS_ADDRESS_BITS 53 130 131 #define ILOG2_4MB 22 132 #define ILOG2_256MB 28 133 134 #ifndef __ASSEMBLY__ 135 136 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 137 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 138 139 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 140 141 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) 142 143 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 144 145 #define virt_to_phys __pa 146 #define phys_to_virt __va 147 148 #endif /* !(__ASSEMBLY__) */ 149 150 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 151 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 152 153 #include <asm-generic/getorder.h> 154 155 #endif /* _SPARC64_PAGE_H */ 156