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