page_64.h (4753B)
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) 39struct pt_regs; 40void hugetlb_setup(struct pt_regs *regs); 41#endif 42 43#define WANT_PAGE_VIRTUAL 44 45void _clear_page(void *page); 46#define clear_page(X) _clear_page((void *)(X)) 47struct page; 48void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 49#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 50void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 51#define __HAVE_ARCH_COPY_USER_HIGHPAGE 52struct vm_area_struct; 53void copy_user_highpage(struct page *to, struct page *from, 54 unsigned long vaddr, struct vm_area_struct *vma); 55#define __HAVE_ARCH_COPY_HIGHPAGE 56void 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.. */ 69typedef struct { unsigned long pte; } pte_t; 70typedef struct { unsigned long iopte; } iopte_t; 71typedef struct { unsigned long pmd; } pmd_t; 72typedef struct { unsigned long pud; } pud_t; 73typedef struct { unsigned long pgd; } pgd_t; 74typedef 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 */ 92typedef unsigned long pte_t; 93typedef unsigned long iopte_t; 94typedef unsigned long pmd_t; 95typedef unsigned long pud_t; 96typedef unsigned long pgd_t; 97typedef 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 115typedef pte_t *pgtable_t; 116 117extern unsigned long sparc64_va_hole_top; 118extern 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 132extern 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#include <asm-generic/getorder.h> 162 163#endif /* _SPARC64_PAGE_H */