mm.c File Reference

Memory Management. More...

#include <l4/env/errno.h>
#include <l4/lock/lock.h>
#include <l4/names/libnames.h>
#include <l4/l4rm/l4rm.h>
#include <l4/dm_mem/dm_mem.h>
#include <l4/dm_phys/dm_phys.h>
#include <l4/dde_linux/dde.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <oskit/lmm.h>
#include "__config.h"
#include "internal.h"

Go to the source code of this file.

Module Variables
int	_initialized = 0
	initialization flag
lmm_t	kpool = LMM_INITIALIZER
	kmem pool
lmm_region_t	kregion [MM_KREGIONS]
	kmem regions in pool
unsigned int	kregion_size
	kmem region size
unsigned int	kcount = MM_KREGIONS - 1
	kmem region counter
l4lock_t	klock = L4LOCK_UNLOCKED_INITIALIZER
	protect access to kmem pool
lmm_t	vpool = LMM_INITIALIZER
	vmem pool
lmm_region_t	vregion
	vmem region in pool
l4lock_t	vlock = L4LOCK_UNLOCKED_INITIALIZER
	protect access to vmem pool
Functions
__inline__ int	__more_kcore (l4_size_t size, l4_uint32_t flags)
	Simulated LMM Callback on Memory Shortage (kmem).
__inline__ int	__more_vcore (l4_size_t size)
	Simulated LMM Callback on Memory Shortage (vmem).
void *	kmalloc (size_t size, int gfp)
	kmem Allocation
void	kfree (const void *addr)
	kmem Deallocation
void *	vmalloc (unsigned long size)
	vmem Allocation
void	vfree (void *addr)
	vmem Deallocation
int	__setup_kmem (unsigned int *max, l4_addr_t *addr)
	Setup kmem pool.
int	__setup_vmem (unsigned int *max, l4_addr_t *addr)
	Setup vmem pool.
int	l4dde_mm_init (unsigned int max_vsize, unsigned int max_ksize)
	Initalize LMM pools and initial regions.
int	l4dde_mm_kmem_avail (void)
	Return amount of free kernel memory.

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Detailed Description

Memory Management.

Date:

08/28/2003

Author:

Christian Helmuth <ch12@os.inf.tu-dresden.de>

Definition in file mm.c.

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Function Documentation

__inline__ int __more_kcore (  l4_size_t  size, l4_uint32_t  flags )  [static]

Simulated LMM Callback on Memory Shortage (kmem). Parameters: size  size of memory chunk needed flags  memory type Returns: 0 on success, negative error code otherwise As long as maximum region number is not exceeded new physical contiguous dataspaces are requested from a dataspace manager and attached to appropriate regions in address space by the L4 Region Mapper. The region is then added as new LMM region to the kmem LMM pool. size is rounded up to multiples of KMEM_RSIZE. I removed the unlock/lock around page requesting that was in the original OSKit implementation's MORECORE() macro (clientos/mem.c). Hope it's still fully functioning. Todo: consider flags Definition at line 107 of file mm.c. References address_add_region(), DEBUG_ERRORS, DEBUG_MALLOC, kcount, kpool, kregion, and kregion_size. Referenced by kmalloc().

__inline__ int __more_vcore (  l4_size_t  size  )  [static]

Simulated LMM Callback on Memory Shortage (vmem). Parameters: size  size of memory chunk needed Returns: -L4_ENOMEM This always returns "Out of memory" as we leave mappings in vmem region to l4rm and dataspace managers. Definition at line 167 of file mm.c. References DEBUG_ERRORS. Referenced by vmalloc().

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