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