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Diffstat (limited to 'include/asm-sh64/page.h')
| -rw-r--r-- | include/asm-sh64/page.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/include/asm-sh64/page.h b/include/asm-sh64/page.h new file mode 100644 index 0000000..e1f7f5a --- /dev/null +++ b/include/asm-sh64/page.h @@ -0,0 +1,137 @@ +#ifndef __ASM_SH64_PAGE_H +#define __ASM_SH64_PAGE_H + +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * include/asm-sh64/page.h + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + * benedict.gaster@superh.com 19th, 24th July 2002. + * + * Modified to take account of enabling for D-CACHE support. + * + */ + +#include <linux/config.h> + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 12 +#ifdef __ASSEMBLY__ +#define PAGE_SIZE 4096 +#else +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#endif +#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 +#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB) +#define HPAGE_SHIFT 29 +#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 struct page *mem_map; +extern void sh64_page_clear(void *page); +extern void sh64_page_copy(void *from, void *to); + +#define clear_page(page) sh64_page_clear(page) +#define copy_page(to,from) sh64_page_copy(from, to) + +#if defined(CONFIG_DCACHE_DISABLED) + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +#else + +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); + +#endif /* defined(CONFIG_DCACHE_DISABLED) */ + +/* + * These are used to make use of C type-checking.. + */ +typedef struct { unsigned long 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) + +/* + * Kconfig defined. + */ +#define __MEMORY_START (CONFIG_MEMORY_START) +#define PAGE_OFFSET (CONFIG_CACHED_MEMORY_OFFSET) + +#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) +#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) +#define MAP_NR(addr) ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT) +#define VALID_PAGE(page) ((page - mem_map) < max_mapnr) + +#define phys_to_page(phys) (mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT)) +#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START) + +/* 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 */ +extern __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_SH64_PAGE_H */ |