mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-27 01:11:06 +00:00
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/*
|
|
* \brief Memory subsystem
|
|
* \author Christian Helmuth
|
|
* \date 2008-08-15
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2008-2011 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__DDE_KIT__MEMORY_H_
|
|
#define _INCLUDE__DDE_KIT__MEMORY_H_
|
|
|
|
#include <dde_kit/types.h>
|
|
|
|
|
|
/*******************
|
|
** Slab facility **
|
|
*******************/
|
|
|
|
struct dde_kit_slab;
|
|
|
|
/**
|
|
* Store user pointer in slab cache
|
|
*
|
|
* \param slab pointer to slab cache
|
|
* \param data user pointer
|
|
*/
|
|
void dde_kit_slab_set_data(struct dde_kit_slab * slab, void *data);
|
|
|
|
/**
|
|
* Read user pointer from slab cache
|
|
*
|
|
* \param slab pointer to slab cache
|
|
*
|
|
* \return stored user pointer or 0
|
|
*/
|
|
void *dde_kit_slab_get_data(struct dde_kit_slab * slab);
|
|
|
|
/**
|
|
* Allocate slab in slab cache
|
|
*
|
|
* \param slab pointer to slab cache
|
|
*
|
|
* \return pointer to allocated slab
|
|
*/
|
|
void *dde_kit_slab_alloc(struct dde_kit_slab * slab);
|
|
|
|
/**
|
|
* Deallocate slab in slab cache
|
|
*
|
|
* \param slab pointer to slab cache
|
|
* \param objp pointer to allocated slab
|
|
*/
|
|
void dde_kit_slab_free(struct dde_kit_slab * slab, void *objp);
|
|
|
|
/**
|
|
* Destroy slab cache
|
|
*
|
|
* \param slab pointer to slab cache structure
|
|
*/
|
|
void dde_kit_slab_destroy(struct dde_kit_slab * slab);
|
|
|
|
/**
|
|
* Initialize slab cache
|
|
*
|
|
* \param size size of cache objects
|
|
*
|
|
* \return pointer to new slab cache or 0 on error
|
|
*
|
|
* Allocated blocks have valid virt->phys mappings and are physically
|
|
* contiguous.
|
|
*/
|
|
struct dde_kit_slab * dde_kit_slab_init(unsigned size);
|
|
|
|
|
|
/**********************************
|
|
** Large-block memory allocator **
|
|
**********************************/
|
|
|
|
/**
|
|
* Allocate large memory block
|
|
*
|
|
* \param size block size
|
|
*
|
|
* \return pointer to new memory block
|
|
*
|
|
* Allocations via this allocator may be slow (because RPCs to remote services
|
|
* may be involved) and should be used only for large blocks of several pages.
|
|
* If allocations/deallocations are relatively dynamic the large memory
|
|
* allocator should be used as backend for a block caching frontend.
|
|
*
|
|
* Allocated blocks have valid virt->phys mappings and are physically
|
|
* contiguous.
|
|
*/
|
|
void *dde_kit_large_malloc(dde_kit_size_t size);
|
|
|
|
/**
|
|
* Free large memory block
|
|
*
|
|
* \param p pointer to memory block
|
|
*/
|
|
void dde_kit_large_free(void *p);
|
|
|
|
|
|
/*****************************
|
|
** Simple memory allocator **
|
|
*****************************/
|
|
|
|
/**
|
|
* Allocate memory block via simple allocator
|
|
*
|
|
* \param size block size
|
|
*
|
|
* \return pointer to new memory block
|
|
*
|
|
* The blocks allocated via this allocator CANNOT be used for DMA or other
|
|
* device operations, i.e., there exists no virt->phys mapping.
|
|
*/
|
|
void *dde_kit_simple_malloc(dde_kit_size_t size);
|
|
|
|
/**
|
|
* Free memory block via simple allocator
|
|
*
|
|
* \param p pointer to memory block
|
|
*
|
|
* As in C99, if 'p' is NULL no operation is performed.
|
|
*/
|
|
void dde_kit_simple_free(void *p);
|
|
|
|
#endif /* _INCLUDE__DDE_KIT__MEMORY_H_ */
|