fd4fd5aac1
Someone mentioned that almost all the architectures used basically the same implementation of get_order. This patch consolidates them into asm-generic/page.h and includes that in the appropriate places. The exceptions are ia64 and ppc which have their own (presumably optimised) versions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
#ifndef __ASM_SH64_PAGE_H
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#define __ASM_SH64_PAGE_H
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* include/asm-sh64/page.h
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*
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* Copyright (C) 2000, 2001 Paolo Alberelli
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* Copyright (C) 2003, 2004 Paul Mundt
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*
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* benedict.gaster@superh.com 19th, 24th July 2002.
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*
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* Modified to take account of enabling for D-CACHE support.
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*
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*/
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#include <linux/config.h>
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT 12
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#ifdef __ASSEMBLY__
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#define PAGE_SIZE 4096
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#else
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#endif
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define PTE_MASK PAGE_MASK
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#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
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#define HPAGE_SHIFT 16
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
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#define HPAGE_SHIFT 20
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
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#define HPAGE_SHIFT 29
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#endif
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#ifdef CONFIG_HUGETLB_PAGE
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#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE-1))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
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#define ARCH_HAS_SETCLEAR_HUGE_PTE
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#endif
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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extern struct page *mem_map;
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extern void sh64_page_clear(void *page);
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extern void sh64_page_copy(void *from, void *to);
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#define clear_page(page) sh64_page_clear(page)
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#define copy_page(to,from) sh64_page_copy(from, to)
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#if defined(CONFIG_DCACHE_DISABLED)
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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#else
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extern void clear_user_page(void *to, unsigned long address, struct page *pg);
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extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
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#endif /* defined(CONFIG_DCACHE_DISABLED) */
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct { unsigned long long pte; } pte_t;
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typedef struct { unsigned long pmd; } pmd_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pte_val(x) ((x).pte)
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#define pmd_val(x) ((x).pmd)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __pmd(x) ((pmd_t) { (x) } )
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#endif /* !__ASSEMBLY__ */
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/* to align the pointer to the (next) page boundary */
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
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/*
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* Kconfig defined.
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*/
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#define __MEMORY_START (CONFIG_MEMORY_START)
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#define PAGE_OFFSET (CONFIG_CACHED_MEMORY_OFFSET)
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#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
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#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
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#define MAP_NR(addr) ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)
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#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
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#define phys_to_page(phys) (mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT))
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#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
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/* PFN start number, because of __MEMORY_START */
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#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
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#define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START)
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#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#endif /* __KERNEL__ */
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#include <asm-generic/page.h>
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#endif /* __ASM_SH64_PAGE_H */
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