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/
usr/
src/
linux-headers-3.0.0-14/
arch/
sh/
include/
asm/
- drwxr-xr-x
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Viewing file:  page.h (5.68 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef __ASM_SH_PAGE_H
#define __ASM_SH_PAGE_H
/*
* Copyright (C) 1999 Niibe Yutaka
*/
#include <linux/const.h>
/* PAGE_SHIFT determines the page size */
#if defined(CONFIG_PAGE_SIZE_4KB)
# define PAGE_SHIFT 12
#elif defined(CONFIG_PAGE_SIZE_8KB)
# define PAGE_SHIFT 13
#elif defined(CONFIG_PAGE_SIZE_16KB)
# define PAGE_SHIFT 14
#elif defined(CONFIG_PAGE_SIZE_64KB)
# define PAGE_SHIFT 16
#else
# error "Bogus kernel page size?"
#endif
#define PAGE_SIZE (_AC(1, UL) << 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_256K)
#define HPAGE_SHIFT 18
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
#define HPAGE_SHIFT 20
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
#define HPAGE_SHIFT 22
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
#define HPAGE_SHIFT 26
#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
#ifndef __ASSEMBLY__
#include <asm/uncached.h>
extern unsigned long shm_align_mask;
extern unsigned long max_low_pfn, min_low_pfn;
extern unsigned long memory_start, memory_end, memory_limit;
static inline unsigned long
pages_do_alias(unsigned long addr1, unsigned long addr2)
{
return (addr1 ^ addr2) & shm_align_mask;
}
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
extern void copy_page(void *to, void *from);
struct page;
struct vm_area_struct;
extern void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
extern void clear_user_highpage(struct page *page, unsigned long vaddr);
#define clear_user_highpage clear_user_highpage
/*
* These are used to make use of C type-checking..
*/
#ifdef CONFIG_X2TLB
typedef struct { unsigned long pte_low, pte_high; } pte_t;
typedef struct { unsigned long long pgprot; } pgprot_t;
typedef struct { unsigned long long pgd; } pgd_t;
#define pte_val(x) \
((x).pte_low | ((unsigned long long)(x).pte_high << 32))
#define __pte(x) \
({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
#elif defined(CONFIG_SUPERH32)
typedef struct { unsigned long pte_low; } pte_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct { unsigned long pgd; } pgd_t;
#define pte_val(x) ((x).pte_low)
#define __pte(x) ((pte_t) { (x) } )
#else
typedef struct { unsigned long long pte_low; } pte_t;
typedef struct { unsigned long long pgprot; } pgprot_t;
typedef struct { unsigned long pgd; } pgd_t;
#define pte_val(x) ((x).pte_low)
#define __pte(x) ((pte_t) { (x) } )
#endif
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
typedef struct page *pgtable_t;
#define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK)
#endif /* !__ASSEMBLY__ */
/*
* __MEMORY_START and SIZE are the physical addresses and size of RAM.
*/
#define __MEMORY_START CONFIG_MEMORY_START
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
/*
* PAGE_OFFSET is the virtual address of the start of kernel address
* space.
*/
#define PAGE_OFFSET CONFIG_PAGE_OFFSET
/*
* Virtual to physical RAM address translation.
*
* In 29 bit mode, the physical offset of RAM from address 0 is visible in
* the kernel virtual address space, and thus we don't have to take
* this into account when translating. However in 32 bit mode this offset
* is not visible (it is part of the PMB mapping) and so needs to be
* added or subtracted as required.
*/
#ifdef CONFIG_PMB
#define ___pa(x) ((x)-PAGE_OFFSET+__MEMORY_START)
#define ___va(x) ((x)+PAGE_OFFSET-__MEMORY_START)
#else
#define ___pa(x) ((x)-PAGE_OFFSET)
#define ___va(x) ((x)+PAGE_OFFSET)
#endif
#ifndef __ASSEMBLY__
#define __pa(x) ___pa((unsigned long)x)
#define __va(x) (void *)___va((unsigned long)x)
#endif /* !__ASSEMBLY__ */
#ifdef CONFIG_UNCACHED_MAPPING
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + uncached_start)
#define CAC_ADDR(addr) ((addr) - uncached_start + PAGE_OFFSET)
#else
#define UNCAC_ADDR(addr) ((addr))
#define CAC_ADDR(addr) ((addr))
#endif
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
/*
* PFN = physical frame number (ie PFN 0 == physical address 0)
* PFN_START is the PFN of the first page of RAM. By defining this we
* don't have struct page entries for the portion of address space
* between physical address 0 and the start of RAM.
*/
#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
#define ARCH_PFN_OFFSET (PFN_START)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
#endif
#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)
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
/* vDSO support */
#ifdef CONFIG_VSYSCALL
#define __HAVE_ARCH_GATE_AREA
#endif
/*
* Some drivers need to perform DMA into kmalloc'ed buffers
* and so we have to increase the kmalloc minalign for this.
*/
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
#ifdef CONFIG_SUPERH64
/*
* While BYTES_PER_WORD == 4 on the current sh64 ABI, GCC will still
* happily generate {ld/st}.q pairs, requiring us to have 8-byte
* alignment to avoid traps. The kmalloc alignment is guaranteed by
* virtue of L1_CACHE_BYTES, requiring this to only be special cased
* for slab caches.
*/
#define ARCH_SLAB_MINALIGN 8
#endif
#endif /* __ASM_SH_PAGE_H */
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