1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ALPHA_PAGE_H 3#define _ALPHA_PAGE_H 4 5#include <linux/const.h> 6#include <asm/pal.h> 7 8/* PAGE_SHIFT determines the page size */ 9#define PAGE_SHIFT CONFIG_PAGE_SHIFT 10#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 11#define PAGE_MASK (~(PAGE_SIZE-1)) 12 13#ifndef __ASSEMBLY__ 14 15#define STRICT_MM_TYPECHECKS 16 17extern void clear_page(void *page); 18#define clear_user_page(page, vaddr, pg) clear_page(page) 19 20#define vma_alloc_zeroed_movable_folio(vma, vaddr) \ 21 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false) 22 23extern void copy_page(void * _to, void * _from); 24#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 25 26#ifdef STRICT_MM_TYPECHECKS 27/* 28 * These are used to make use of C type-checking.. 29 */ 30typedef struct { unsigned long pte; } pte_t; 31typedef struct { unsigned long pmd; } pmd_t; 32typedef struct { unsigned long pgd; } pgd_t; 33typedef struct { unsigned long pgprot; } pgprot_t; 34 35#define pte_val(x) ((x).pte) 36#define pmd_val(x) ((x).pmd) 37#define pgd_val(x) ((x).pgd) 38#define pgprot_val(x) ((x).pgprot) 39 40#define __pte(x) ((pte_t) { (x) } ) 41#define __pmd(x) ((pmd_t) { (x) } ) 42#define __pgd(x) ((pgd_t) { (x) } ) 43#define __pgprot(x) ((pgprot_t) { (x) } ) 44 45#else 46/* 47 * .. while these make it easier on the compiler 48 */ 49typedef unsigned long pte_t; 50typedef unsigned long pmd_t; 51typedef unsigned long pgd_t; 52typedef unsigned long pgprot_t; 53 54#define pte_val(x) (x) 55#define pmd_val(x) (x) 56#define pgd_val(x) (x) 57#define pgprot_val(x) (x) 58 59#define __pte(x) (x) 60#define __pgd(x) (x) 61#define __pgprot(x) (x) 62 63#endif /* STRICT_MM_TYPECHECKS */ 64 65typedef struct page *pgtable_t; 66 67#ifdef USE_48_BIT_KSEG 68#define PAGE_OFFSET 0xffff800000000000UL 69#else 70#define PAGE_OFFSET 0xfffffc0000000000UL 71#endif 72 73#else 74 75#ifdef USE_48_BIT_KSEG 76#define PAGE_OFFSET 0xffff800000000000 77#else 78#define PAGE_OFFSET 0xfffffc0000000000 79#endif 80 81#endif /* !__ASSEMBLY__ */ 82 83#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) 84#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 85 86#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 87#define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT)) 88 89#include <asm-generic/memory_model.h> 90#include <asm-generic/getorder.h> 91 92#endif /* _ALPHA_PAGE_H */ 93