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Diffstat (limited to 'include/asm-sh/page.h')
| -rw-r--r-- | include/asm-sh/page.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h new file mode 100644 index 00000000000..4c6d129e7d9 --- /dev/null +++ b/include/asm-sh/page.h @@ -0,0 +1,144 @@ +#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 + +#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) +#define HPAGE_SHIFT 16 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) +#define HPAGE_SHIFT 20 +#endif + +#ifdef CONFIG_HUGETLB_PAGE +#define HPAGE_SIZE (1UL << HPAGE_SHIFT) +#define HPAGE_MASK (~(HPAGE_SIZE-1)) +#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) +#endif + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +extern void (*clear_page)(void *to); +extern void (*copy_page)(void *to, void *from); + +extern void clear_page_slow(void *to); +extern void copy_page_slow(void *to, void *from); + +#if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU) +struct page; +extern void clear_user_page(void *to, unsigned long address, struct page *pg); +extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg); +extern void __clear_user_page(void *to, void *orig_to); +extern void __copy_user_page(void *to, void *from, void *orig_to); +#elif defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH3) || !defined(CONFIG_MMU) +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) +#elif defined(CONFIG_CPU_SH4) +struct page; +extern void clear_user_page(void *to, unsigned long address, struct page *pg); +extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg); +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/kernel/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)) + +#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT) + +#ifndef CONFIG_DISCONTIGMEM +#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT)) +#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START) +#endif + +/* PFN start number, because of __MEMORY_START */ +#define PFN_START (__MEMORY_START >> PAGE_SHIFT) + +#define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START) +#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START) +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr) +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#ifndef __ASSEMBLY__ + +/* 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 */ |