1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _SPARC64_PAGE_H 3 #define _SPARC64_PAGE_H 4 5 #include <linux/const.h> 6 7 #define PAGE_SHIFT 13 8 9 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 10 #define PAGE_MASK (~(PAGE_SIZE-1)) 11 12 /* Flushing for D-cache alias handling is only needed if 13 * the page size is smaller than 16K. 14 */ 15 #if PAGE_SHIFT < 14 16 #define DCACHE_ALIASING_POSSIBLE 17 #endif 18 19 #define HPAGE_SHIFT 23 20 #define REAL_HPAGE_SHIFT 22 21 #define HPAGE_16GB_SHIFT 34 22 #define HPAGE_2GB_SHIFT 31 23 #define HPAGE_256MB_SHIFT 28 24 #define HPAGE_64K_SHIFT 16 25 #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT) 26 27 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 28 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 29 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) 30 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 31 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 32 #define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT)) 33 #define HUGE_MAX_HSTATE 5 34 #endif 35 36 #ifndef __ASSEMBLY__ 37 38 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 39 struct pt_regs; 40 void hugetlb_setup(struct pt_regs *regs); 41 #endif 42 43 #define WANT_PAGE_VIRTUAL 44 45 void _clear_page(void *page); 46 #define clear_page(X) _clear_page((void *)(X)) 47 struct page; 48 void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 49 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 50 void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 51 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 52 struct vm_area_struct; 53 void copy_user_highpage(struct page *to, struct page *from, 54 unsigned long vaddr, struct vm_area_struct *vma); 55 #define __HAVE_ARCH_COPY_HIGHPAGE 56 void copy_highpage(struct page *to, struct page *from); 57 58 /* Unlike sparc32, sparc64's parameter passing API is more 59 * sane in that structures which as small enough are passed 60 * in registers instead of on the stack. Thus, setting 61 * STRICT_MM_TYPECHECKS does not generate worse code so 62 * let's enable it to get the type checking. 63 */ 64 65 #define STRICT_MM_TYPECHECKS 66 67 #ifdef STRICT_MM_TYPECHECKS 68 /* These are used to make use of C type-checking.. */ 69 typedef struct { unsigned long pte; } pte_t; 70 typedef struct { unsigned long iopte; } iopte_t; 71 typedef struct { unsigned long pmd; } pmd_t; 72 typedef struct { unsigned long pud; } pud_t; 73 typedef struct { unsigned long pgd; } pgd_t; 74 typedef struct { unsigned long pgprot; } pgprot_t; 75 76 #define pte_val(x) ((x).pte) 77 #define iopte_val(x) ((x).iopte) 78 #define pmd_val(x) ((x).pmd) 79 #define pud_val(x) ((x).pud) 80 #define pgd_val(x) ((x).pgd) 81 #define pgprot_val(x) ((x).pgprot) 82 83 #define __pte(x) ((pte_t) { (x) } ) 84 #define __iopte(x) ((iopte_t) { (x) } ) 85 #define __pmd(x) ((pmd_t) { (x) } ) 86 #define __pud(x) ((pud_t) { (x) } ) 87 #define __pgd(x) ((pgd_t) { (x) } ) 88 #define __pgprot(x) ((pgprot_t) { (x) } ) 89 90 #else 91 /* .. while these make it easier on the compiler */ 92 typedef unsigned long pte_t; 93 typedef unsigned long iopte_t; 94 typedef unsigned long pmd_t; 95 typedef unsigned long pud_t; 96 typedef unsigned long pgd_t; 97 typedef unsigned long pgprot_t; 98 99 #define pte_val(x) (x) 100 #define iopte_val(x) (x) 101 #define pmd_val(x) (x) 102 #define pud_val(x) (x) 103 #define pgd_val(x) (x) 104 #define pgprot_val(x) (x) 105 106 #define __pte(x) (x) 107 #define __iopte(x) (x) 108 #define __pmd(x) (x) 109 #define __pud(x) (x) 110 #define __pgd(x) (x) 111 #define __pgprot(x) (x) 112 113 #endif /* (STRICT_MM_TYPECHECKS) */ 114 115 typedef pte_t *pgtable_t; 116 117 extern unsigned long sparc64_va_hole_top; 118 extern unsigned long sparc64_va_hole_bottom; 119 120 /* The next two defines specify the actual exclusion region we 121 * enforce, wherein we use a 4GB red zone on each side of the VA hole. 122 */ 123 #define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL)) 124 #define VA_EXCLUDE_END (sparc64_va_hole_top + (1UL << 32UL)) 125 126 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ 127 _AC(0x0000000070000000,UL) : \ 128 VA_EXCLUDE_END) 129 130 #include <asm-generic/memory_model.h> 131 132 extern unsigned long PAGE_OFFSET; 133 134 #endif /* !(__ASSEMBLY__) */ 135 136 /* The maximum number of physical memory address bits we support. The 137 * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS" 138 * evaluates to. 139 */ 140 #define MAX_PHYS_ADDRESS_BITS 53 141 142 #define ILOG2_4MB 22 143 #define ILOG2_256MB 28 144 145 #ifndef __ASSEMBLY__ 146 147 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 148 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 149 150 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 151 152 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) 153 154 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 155 156 #define virt_to_phys __pa 157 #define phys_to_virt __va 158 159 #endif /* !(__ASSEMBLY__) */ 160 161 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 162 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 163 164 #include <asm-generic/getorder.h> 165 166 #endif /* _SPARC64_PAGE_H */ 167