1 /* 2 * linux/arch/unicore32/include/asm/page.h 3 * 4 * Code specific to PKUnity SoC and UniCore ISA 5 * 6 * Copyright (C) 2001-2010 GUAN Xue-tao 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 #ifndef __UNICORE_PAGE_H__ 13 #define __UNICORE_PAGE_H__ 14 15 /* PAGE_SHIFT determines the page size */ 16 #define PAGE_SHIFT 12 17 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 18 #define PAGE_MASK (~(PAGE_SIZE-1)) 19 20 #ifndef __ASSEMBLY__ 21 22 struct page; 23 struct vm_area_struct; 24 25 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 26 extern void copy_page(void *to, const void *from); 27 28 #define clear_user_page(page, vaddr, pg) clear_page(page) 29 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 30 31 #undef STRICT_MM_TYPECHECKS 32 33 #ifdef STRICT_MM_TYPECHECKS 34 /* 35 * These are used to make use of C type-checking.. 36 */ 37 typedef struct { unsigned long pte; } pte_t; 38 typedef struct { unsigned long pgd; } pgd_t; 39 typedef struct { unsigned long pgprot; } pgprot_t; 40 41 #define pte_val(x) ((x).pte) 42 #define pgd_val(x) ((x).pgd) 43 #define pgprot_val(x) ((x).pgprot) 44 45 #define __pte(x) ((pte_t) { (x) }) 46 #define __pgd(x) ((pgd_t) { (x) }) 47 #define __pgprot(x) ((pgprot_t) { (x) }) 48 49 #else 50 /* 51 * .. while these make it easier on the compiler 52 */ 53 typedef unsigned long pte_t; 54 typedef unsigned long pgd_t; 55 typedef unsigned long pgprot_t; 56 57 #define pte_val(x) (x) 58 #define pgd_val(x) (x) 59 #define pgprot_val(x) (x) 60 61 #define __pte(x) (x) 62 #define __pgd(x) (x) 63 #define __pgprot(x) (x) 64 65 #endif /* STRICT_MM_TYPECHECKS */ 66 67 typedef struct page *pgtable_t; 68 69 extern int pfn_valid(unsigned long); 70 71 #include <asm/memory.h> 72 73 #endif /* !__ASSEMBLY__ */ 74 75 #define VM_DATA_DEFAULT_FLAGS \ 76 (VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 77 78 #include <asm-generic/getorder.h> 79 80 #endif 81