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 13 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 17 extern void clear_page(void *page); 18 #define clear_user_page(page, vaddr, pg) clear_page(page) 19 20 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 21 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vmaddr) 22 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 23 24 extern void copy_page(void * _to, void * _from); 25 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 26 27 #ifdef STRICT_MM_TYPECHECKS 28 /* 29 * These are used to make use of C type-checking.. 30 */ 31 typedef struct { unsigned long pte; } pte_t; 32 typedef struct { unsigned long pmd; } pmd_t; 33 typedef struct { unsigned long pgd; } pgd_t; 34 typedef struct { unsigned long pgprot; } pgprot_t; 35 36 #define pte_val(x) ((x).pte) 37 #define pmd_val(x) ((x).pmd) 38 #define pgd_val(x) ((x).pgd) 39 #define pgprot_val(x) ((x).pgprot) 40 41 #define __pte(x) ((pte_t) { (x) } ) 42 #define __pmd(x) ((pmd_t) { (x) } ) 43 #define __pgd(x) ((pgd_t) { (x) } ) 44 #define __pgprot(x) ((pgprot_t) { (x) } ) 45 46 #else 47 /* 48 * .. while these make it easier on the compiler 49 */ 50 typedef unsigned long pte_t; 51 typedef unsigned long pmd_t; 52 typedef unsigned long pgd_t; 53 typedef unsigned long pgprot_t; 54 55 #define pte_val(x) (x) 56 #define pmd_val(x) (x) 57 #define pgd_val(x) (x) 58 #define pgprot_val(x) (x) 59 60 #define __pte(x) (x) 61 #define __pgd(x) (x) 62 #define __pgprot(x) (x) 63 64 #endif /* STRICT_MM_TYPECHECKS */ 65 66 typedef struct page *pgtable_t; 67 68 #ifdef USE_48_BIT_KSEG 69 #define PAGE_OFFSET 0xffff800000000000UL 70 #else 71 #define PAGE_OFFSET 0xfffffc0000000000UL 72 #endif 73 74 #else 75 76 #ifdef USE_48_BIT_KSEG 77 #define PAGE_OFFSET 0xffff800000000000 78 #else 79 #define PAGE_OFFSET 0xfffffc0000000000 80 #endif 81 82 #endif /* !__ASSEMBLY__ */ 83 84 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) 85 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 86 #ifndef CONFIG_DISCONTIGMEM 87 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 88 89 #define pfn_valid(pfn) ((pfn) < max_mapnr) 90 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 91 #endif /* CONFIG_DISCONTIGMEM */ 92 93 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 94 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 95 96 #include <asm-generic/memory_model.h> 97 #include <asm-generic/getorder.h> 98 99 #endif /* _ALPHA_PAGE_H */ 100
