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