kmalloc.c File Reference

#include "cpu/arch_consts.h"
#include <math.h>
#include <stdlib.h>
#include <string.h>

Macros
#define	KMALLOC_BMAP_SZ   (((KMALLOC_SZ*1024)/4)/8)
	The size of the kmalloc bitmap.

Functions
static char	get_bmap_bit (size_t index)
static void	set_bmap_bit (size_t index)
static void	clear_bmap_bit (size_t index)
void *	kmalloc (size_t size)
void	kfree (void *mem)

Variables
static char	bitmap [KMALLOC_BMAP_SZ]
	Bitmap of used areas of the heap.
static void *	data =(void*)KMALLOC_START
	Start of the kmalloc heap.

Function Documentation

clear_bmap_bit()

static void clear_bmap_bit ( size_t  index )

static

Clear a bit in the heap bitmap

Parameters

index

The bit to clear

get_bmap_bit()

static char get_bmap_bit ( size_t  index )

static

Get a bit in the heap bitmap

Parameters

index

The bit to get

Returns

the bit

kfree()

void kfree

(

void *

mem

)

Free a block in the kernel heap

Parameters

mem	The address of the block

kmalloc()

void* kmalloc

(

size_t

size

)

Allocate a block in the kernel heap

Parameters

size	The size of the block

Returns

the address of the block in the heap.

set_bmap_bit()

static void set_bmap_bit ( size_t  index )

static

Set a bit in the heap bitmap

Parameters

index

The bit to set