1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_SCORE_PAGE_H 3 #define _ASM_SCORE_PAGE_H 4 5 #include <linux/pfn.h> 6 #include <linux/const.h> 7 8 /* PAGE_SHIFT determines the page size */ 9 #define PAGE_SHIFT (12) 10 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 11 #define PAGE_MASK (~(PAGE_SIZE-1)) 12 13 #ifdef __KERNEL__ 14 15 #ifndef __ASSEMBLY__ 16 17 #define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1))) 18 #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1))) 19 20 /* align addr on a size boundary - adjust address up/down if needed */ 21 #define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1))) 22 #define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1))) 23 24 /* align addr on a size boundary - adjust address up if needed */ 25 #define _ALIGN(addr, size) _ALIGN_UP(addr, size) 26 27 /* 28 * PAGE_OFFSET -- the first address of the first page of memory. When not 29 * using MMU this corresponds to the first free page in physical memory (aligned 30 * on a page boundary). 31 */ 32 #define PAGE_OFFSET (0xA0000000UL) 33 34 #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) 35 #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) 36 37 #define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) 38 #define copy_user_page(vto, vfrom, vaddr, topg) \ 39 memcpy((vto), (vfrom), PAGE_SIZE) 40 41 /* 42 * These are used to make use of C type-checking.. 43 */ 44 45 typedef struct { unsigned long pte; } pte_t; /* page table entry */ 46 typedef struct { unsigned long pgd; } pgd_t; /* PGD table entry */ 47 typedef struct { unsigned long pgprot; } pgprot_t; 48 typedef struct page *pgtable_t; 49 50 #define pte_val(x) ((x).pte) 51 #define pgd_val(x) ((x).pgd) 52 #define pgprot_val(x) ((x).pgprot) 53 54 #define __pte(x) ((pte_t) { (x) }) 55 #define __pgd(x) ((pgd_t) { (x) }) 56 #define __pgprot(x) ((pgprot_t) { (x) }) 57 58 extern unsigned long max_low_pfn; 59 extern unsigned long min_low_pfn; 60 extern unsigned long max_pfn; 61 62 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 63 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 64 65 #define phys_to_pfn(phys) (PFN_DOWN(phys)) 66 #define pfn_to_phys(pfn) (PFN_PHYS(pfn)) 67 68 #define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr)))) 69 #define pfn_to_virt(pfn) __va(pfn_to_phys((pfn))) 70 71 #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) 72 #define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) 73 74 #define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) 75 #define page_to_bus(page) (page_to_phys(page)) 76 #define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) 77 78 #define pfn_valid(pfn) (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn)) 79 80 #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) 81 82 #endif /* __ASSEMBLY__ */ 83 84 #define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) 85 86 #endif /* __KERNEL__ */ 87 88 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 89 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 90 91 #include <asm-generic/memory_model.h> 92 #include <asm-generic/getorder.h> 93 94 #endif /* _ASM_SCORE_PAGE_H */ 95