page.h File Reference

#include <asm/setup.h>
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>

Go to the source code of this file.

Data Structures
struct	pte_t
struct	pmd_t
struct	pgd_t
struct	pgprot_t

Macros
#define	PAGE_SHIFT   12
#define	PAGE_SIZE   (1UL << PAGE_SHIFT)
#define	PAGE_MASK   (~(PAGE_SIZE-1))
#define	get_user_page(vaddr)   __get_free_page(GFP_KERNEL)
#define	free_user_page(page, addr)   free_page(addr)
#define	clear_page(page)   memset((page), 0, PAGE_SIZE)
#define	copy_page(to, from)   memcpy((to), (from), PAGE_SIZE)
#define	clear_user_page(page, vaddr, pg)   clear_page(page)
#define	copy_user_page(to, from, vaddr, pg)   copy_page(to, from)
#define	pte_val(x)   ((x).pte)
#define	pmd_val(x)   ((&x)->pmd[0])
#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) } )
#define	PAGE_OFFSET   (0)
#define	ARCH_PFN_OFFSET   (PAGE_OFFSET >> PAGE_SHIFT)
#define	__va(x)   ((void *)((unsigned long) (x)))
#define	__pa(x)   ((unsigned long) (x))
#define	virt_to_pfn(kaddr)   (__pa(kaddr) >> PAGE_SHIFT)
#define	pfn_to_virt(pfn)   __va((pfn) << PAGE_SHIFT)
#define	virt_to_page(addr)   pfn_to_page(virt_to_pfn(addr))
#define	page_to_virt(page)   pfn_to_virt(page_to_pfn(page))
#define	page_to_phys(page)   ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
#define	pfn_valid(pfn)   ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
#define	virt_addr_valid(kaddr)

Typedefs
typedef struct page *	pgtable_t

Variables
unsigned long	memory_start
unsigned long	memory_end

Macro Definition Documentation

#define __pa

(

x

)

((unsigned long) (x))

Definition at line 81 of file page.h.

#define __pgd

(

x

)

((pgd_t) { (x) } )

Definition at line 60 of file page.h.

#define __pgprot

(

x

)

((pgprot_t) { (x) } )

Definition at line 61 of file page.h.

#define __pmd

(

x

)

((pmd_t) { (x) } )

Definition at line 59 of file page.h.

#define __pte

(

x

)

((pte_t) { (x) } )

Definition at line 58 of file page.h.

#define __va

(

x

)

((void *)((unsigned long) (x)))

Definition at line 80 of file page.h.

#define ARCH_PFN_OFFSET   (PAGE_OFFSET >> PAGE_SHIFT)

Definition at line 75 of file page.h.

#define clear_page

(

page

)

memset((page), 0, PAGE_SIZE)

Definition at line 30 of file page.h.

#define clear_user_page	(		page,
			vaddr,
			pg
	)		clear_page(page)

Definition at line 33 of file page.h.

#define copy_page	(		to,
			from
	)		memcpy((to), (from), PAGE_SIZE)

Definition at line 31 of file page.h.

#define copy_user_page	(		to,
			from,
			vaddr,
			pg
	)		copy_page(to, from)

Definition at line 34 of file page.h.

#define free_user_page	(		page,
			addr
	)		free_page(addr)

Definition at line 28 of file page.h.

#define get_user_page

(

vaddr

)

__get_free_page(GFP_KERNEL)

Definition at line 27 of file page.h.

#define PAGE_MASK   (~(PAGE_SIZE-1))

Definition at line 21 of file page.h.

#define PAGE_OFFSET   (0)

Definition at line 71 of file page.h.

#define PAGE_SHIFT   12

Definition at line 15 of file page.h.

#define PAGE_SIZE   (1UL << PAGE_SHIFT)

Definition at line 19 of file page.h.

#define page_to_phys

(

page

)

((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)

Definition at line 90 of file page.h.

#define page_to_virt

(

page

)

pfn_to_virt(page_to_pfn(page))

Definition at line 87 of file page.h.

#define pfn_to_virt

(

pfn

)

__va((pfn) << PAGE_SHIFT)

Definition at line 84 of file page.h.

#define pfn_valid

(

pfn

)

((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)

Definition at line 93 of file page.h.

#define pgd_val

(

x

)

((x).pgd)

Definition at line 55 of file page.h.

#define pgprot_val

(

x

)

((x).pgprot)

Definition at line 56 of file page.h.

#define pmd_val

(

x

)

((&x)->pmd[0])

Definition at line 54 of file page.h.

#define pte_val

(

x

)

((x).pte)

Definition at line 53 of file page.h.

#define virt_addr_valid

(

kaddr

)

Value:

(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
                ((void *)(kaddr) < (void *)memory_end))

Definition at line 95 of file page.h.

#define virt_to_page

(

addr

)

pfn_to_page(virt_to_pfn(addr))

Definition at line 86 of file page.h.

#define virt_to_pfn

(

kaddr

)

(__pa(kaddr) >> PAGE_SHIFT)

Definition at line 83 of file page.h.

Typedef Documentation

typedef struct page* pgtable_t

Definition at line 51 of file page.h.

Variable Documentation

unsigned long memory_end

Definition at line 42 of file setup.c.

unsigned long memory_start

Definition at line 42 of file setup.c.