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