1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/arch/unicore32/include/asm/page.h 4 * 5 * Code specific to PKUnity SoC and UniCore ISA 6 * 7 * Copyright (C) 2001-2010 GUAN Xue-tao 8 */ 9 #ifndef __UNICORE_PAGE_H__ 10 #define __UNICORE_PAGE_H__ 11 12 /* PAGE_SHIFT determines the page size */ 13 #define PAGE_SHIFT 12 14 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 15 #define PAGE_MASK (~(PAGE_SIZE-1)) 16 17 #ifndef __ASSEMBLY__ 18 19 struct page; 20 struct vm_area_struct; 21 22 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 23 extern void copy_page(void *to, const void *from); 24 25 #define clear_user_page(page, vaddr, pg) clear_page(page) 26 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 27 28 #undef STRICT_MM_TYPECHECKS 29 30 #ifdef STRICT_MM_TYPECHECKS 31 /* 32 * These are used to make use of C type-checking.. 33 */ 34 typedef struct { unsigned long pte; } pte_t; 35 typedef struct { unsigned long pgd; } pgd_t; 36 typedef struct { unsigned long pgprot; } pgprot_t; 37 38 #define pte_val(x) ((x).pte) 39 #define pgd_val(x) ((x).pgd) 40 #define pgprot_val(x) ((x).pgprot) 41 42 #define __pte(x) ((pte_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 pgd_t; 52 typedef unsigned long pgprot_t; 53 54 #define pte_val(x) (x) 55 #define pgd_val(x) (x) 56 #define pgprot_val(x) (x) 57 58 #define __pte(x) (x) 59 #define __pgd(x) (x) 60 #define __pgprot(x) (x) 61 62 #endif /* STRICT_MM_TYPECHECKS */ 63 64 typedef struct page *pgtable_t; 65 66 extern int pfn_valid(unsigned long); 67 68 #include <asm/memory.h> 69 70 #endif /* !__ASSEMBLY__ */ 71 72 #define VM_DATA_DEFAULT_FLAGS \ 73 (VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 74 75 #include <asm-generic/getorder.h> 76 77 #endif 78
