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 vma_alloc_zeroed_movable_folio(vma, vaddr) \ 21 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false) 22 23 extern 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 */ 30 typedef struct { unsigned long pte; } pte_t; 31 typedef struct { unsigned long pmd; } pmd_t; 32 typedef struct { unsigned long pgd; } pgd_t; 33 typedef 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 */ 49 typedef unsigned long pte_t; 50 typedef unsigned long pmd_t; 51 typedef unsigned long pgd_t; 52 typedef 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 65 typedef 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