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>
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
#ifndef _ASM_M32R_PAGE_H
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#define _ASM_M32R_PAGE_H
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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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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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extern void clear_page(void *to);
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extern void copy_page(void *to, void *from);
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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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#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
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#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
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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 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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#define pte_val(x) ((x).pte)
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#define PTE_MASK PAGE_MASK
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typedef struct { unsigned long pgprot; } pgprot_t;
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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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* This handles the memory map.. We could make this a config
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* option, but too many people screw it up, and too few need
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* it.
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*
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* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
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* a virtual address space of one gigabyte, which limits the
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* amount of physical memory you can use to about 950MB.
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*
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* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
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* and CONFIG_HIGHMEM64G options in the kernel configuration.
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*/
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/* This handles the memory map.. */
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#define __MEMORY_START CONFIG_MEMORY_START
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#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
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#ifdef CONFIG_MMU
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#define __PAGE_OFFSET (0x80000000)
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#else
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#define __PAGE_OFFSET (0x00000000)
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#endif
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#define PAGE_OFFSET ((unsigned long)__PAGE_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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#ifndef CONFIG_DISCONTIGMEM
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#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
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#define pfn_to_page(pfn) (mem_map + ((pfn) - PFN_BASE))
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#define page_to_pfn(page) \
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((unsigned long)((page) - mem_map) + PFN_BASE)
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#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
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#endif /* !CONFIG_DISCONTIGMEM */
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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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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#define devmem_is_allowed(x) 1
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#endif /* __KERNEL__ */
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#include <asm-generic/page.h>
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#endif /* _ASM_M32R_PAGE_H */
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