| #ifndef __ASM_SH_PAGE_H |
| #define __ASM_SH_PAGE_H |
| |
| /* |
| * Copyright (C) 1999 Niibe Yutaka |
| */ |
| |
| /* |
| [ P0/U0 (virtual) ] 0x00000000 <------ User space |
| [ P1 (fixed) cached ] 0x80000000 <------ Kernel space |
| [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access |
| [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area |
| [ P4 control ] 0xE0000000 |
| */ |
| |
| #include <linux/config.h> |
| |
| /* PAGE_SHIFT determines the page size */ |
| #define PAGE_SHIFT 12 |
| #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| #define PTE_MASK PAGE_MASK |
| |
| #ifdef __KERNEL__ |
| #ifndef __ASSEMBLY__ |
| |
| extern void clear_page(void *to); |
| extern void copy_page(void *to, void *from); |
| |
| #if defined(__sh3__) |
| #define clear_user_page(page, vaddr) clear_page(page) |
| #define copy_user_page(to, from, vaddr) copy_page(to, from) |
| #elif defined(__SH4__) |
| extern void clear_user_page(void *to, unsigned long address); |
| extern void copy_user_page(void *to, void *from, unsigned long address); |
| extern void __clear_user_page(void *to, void *orig_to); |
| extern void __copy_user_page(void *to, void *from, void *orig_to); |
| #endif |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef struct { unsigned long pte; } pte_t; |
| typedef struct { unsigned long pmd; } pmd_t; |
| typedef struct { unsigned long pgd; } pgd_t; |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| |
| #define pte_val(x) ((x).pte) |
| #define pmd_val(x) ((x).pmd) |
| #define pgd_val(x) ((x).pgd) |
| #define pgprot_val(x) ((x).pgprot) |
| |
| #define __pte(x) ((pte_t) { (x) } ) |
| #define __pmd(x) ((pmd_t) { (x) } ) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| /* to align the pointer to the (next) page boundary */ |
| #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| |
| /* |
| * IF YOU CHANGE THIS, PLEASE ALSO CHANGE |
| * |
| * arch/sh/vmlinux.lds.S |
| * |
| * which has the same constant encoded.. |
| */ |
| |
| #define __MEMORY_START CONFIG_MEMORY_START |
| #define __MEMORY_SIZE CONFIG_MEMORY_SIZE |
| #ifdef CONFIG_DISCONTIGMEM |
| /* Just for HP690, for now.. */ |
| #define __MEMORY_START_2ND (__MEMORY_START+0x02000000) |
| #define __MEMORY_SIZE_2ND 0x001000000 /* 16MB */ |
| #endif |
| |
| #define PAGE_OFFSET (0x80000000UL) |
| #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) |
| #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) |
| |
| #ifndef CONFIG_DISCONTIGMEM |
| #define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT)) |
| #define VALID_PAGE(page) ((page - mem_map) < max_mapnr) |
| #define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START) |
| #endif |
| |
| #define virt_to_page(kaddr) phys_to_page(__pa(kaddr)) |
| |
| #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * Tell the user there is some problem. |
| */ |
| #define BUG() do { \ |
| printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ |
| asm volatile("nop"); \ |
| } while (0) |
| |
| #define PAGE_BUG(page) do { \ |
| BUG(); \ |
| } while (0) |
| |
| /* Pure 2^n version of get_order */ |
| static __inline__ int get_order(unsigned long size) |
| { |
| int order; |
| |
| size = (size-1) >> (PAGE_SHIFT-1); |
| order = -1; |
| do { |
| size >>= 1; |
| order++; |
| } while (size); |
| return order; |
| } |
| |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* __ASM_SH_PAGE_H */ |