pm.c File Reference

#include <errno.h>
#include <arch/x86/multiboot.h>
#include <types.h>
#include "pm.h"

Go to the source code of this file.

Macros
#define	ALIGN_UP(boundary, val)   (val + (boundary - 1)) & (~(boundary - 1))

Functions
int	pok_pm_init ()
uint32_t	pok_pm_sbrk (uint32_t increment)

Variables
void *	__pok_begin
void *	__pok_end
uint32_t	pok_multiboot_magic
uint32_t	pok_multiboot_info
uint32_t	pok_x86_pm_heap_start
uint32_t	pok_x86_pm_brk
uint32_t	pok_x86_pm_heap_end

---

Detailed Description

Author:

Julian Pidancet

Julien Delange

Date:

2008-2009

Definition in file pm.c.

---

Macro Definition Documentation

#define ALIGN_UP	(		boundary,
			val
	)		(val + (boundary - 1)) & (~(boundary - 1))

Definition at line 30 of file pm.c.

---

Function Documentation

int pok_pm_init

(

)

Definition at line 44 of file pm.c.

{
  pok_multiboot_info_t* mbi;
  uint32_t              free_mem;

  mbi = (pok_multiboot_info_t*) pok_multiboot_info;

#ifdef POK_NEEDS_DMA
  free_mem = MEM_16MB;
#else
  free_mem = ALIGN_UP (4096, (uint32_t)(&__pok_end));
#endif

  pok_x86_pm_heap_start = pok_x86_pm_brk = free_mem;

  pok_x86_pm_heap_end = (uint32_t)(mbi->mem_upper * 1024);

  return (POK_ERRNO_OK);
}

uint32_t pok_pm_sbrk

(

uint32_t

increment

)

Allocation function, very basic, just allocate new memory space each time

Definition at line 68 of file pm.c.

{
  uint32_t addr;
  
  addr = pok_x86_pm_brk;

  pok_x86_pm_brk += increment;

  return (addr);
}

---

Variable Documentation

void* __pok_begin

void* __pok_end

uint32_t pok_multiboot_info

uint32_t pok_multiboot_magic

uint32_t pok_x86_pm_brk

Definition at line 40 of file pm.c.

uint32_t pok_x86_pm_heap_end

Definition at line 41 of file pm.c.

uint32_t pok_x86_pm_heap_start

Definition at line 39 of file pm.c.