page.h File Reference

#include "kconfig.h"

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Macros
#define	PAGE_ORDER_MAX   4
#define	PAGE_SIZE_MIN   256

Functions
unsigned long	get_page_total_size (void)
unsigned long	get_page_total_free_size (void)
long	size_to_page_order (unsigned long size)
	Calculate the page order by giving the size of a memory. More...
unsigned long	page_order_to_size (long order)
	Calculate the page size by giving the page order. More...
void *	alloc_pages (unsigned long order)
	Allocate a new memory page. More...
void	free_pages (unsigned long addr, unsigned long order)
	Free an allocated memory page. More...

Function Documentation

alloc_pages()

void* alloc_pages

(

unsigned long

order

)

Allocate a new memory page.

Parameters

long	The page order.

Return values

void	*: The function returns NULL if the allocation failed; otherwise it returns the address of the allocated memory page.

free_pages()

void free_pages	(	unsigned long	addr,
		unsigned long	order
	)

Free an allocated memory page.

Parameters

addr	Pointer to the memory page.
order	The order of the memory page.

Return values

None

page_order_to_size()

unsigned long page_order_to_size

(

long

order

)

Calculate the page size by giving the page order.

Parameters

long	The page order.

Return values

unsigned

long: The memory size of page in bytes.

size_to_page_order()

long size_to_page_order

(

unsigned long

size

)

Calculate the page order by giving the size of a memory.

Parameters

size	The memory size in bytes.

Return values

long	The page order.