4c35630ccd
The rheap allocation functions return a pointer, but the actual value is based on how the heap was initialized, and so it can be anything, e.g. an offset into a buffer. A ulong is a better representation of the value returned by the allocation functions. This patch changes all of the relevant rheap functions to use a unsigned long integers instead of a pointer. In case of an error, the value returned is a negative error code that has been cast to an unsigned long. The caller can use the IS_ERR_VALUE() macro to check for this. All code which calls the rheap functions is updated accordingly. Macros IS_MURAM_ERR() and IS_DPERR(), have been deleted in favor of IS_ERR_VALUE(). Also added error checking to rh_attach_region(). Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
|
|
* include/asm-ppc/rheap.h
|
|
*
|
|
* Header file for the implementation of a remote heap.
|
|
*
|
|
* Author: Pantelis Antoniou <panto@intracom.gr>
|
|
*
|
|
* 2004 (c) INTRACOM S.A. Greece. This file is licensed under
|
|
* the terms of the GNU General Public License version 2. This program
|
|
* is licensed "as is" without any warranty of any kind, whether express
|
|
* or implied.
|
|
*/
|
|
|
|
#ifndef __ASM_PPC_RHEAP_H__
|
|
#define __ASM_PPC_RHEAP_H__
|
|
|
|
#include <linux/list.h>
|
|
|
|
typedef struct _rh_block {
|
|
struct list_head list;
|
|
unsigned long start;
|
|
int size;
|
|
const char *owner;
|
|
} rh_block_t;
|
|
|
|
typedef struct _rh_info {
|
|
unsigned int alignment;
|
|
int max_blocks;
|
|
int empty_slots;
|
|
rh_block_t *block;
|
|
struct list_head empty_list;
|
|
struct list_head free_list;
|
|
struct list_head taken_list;
|
|
unsigned int flags;
|
|
} rh_info_t;
|
|
|
|
#define RHIF_STATIC_INFO 0x1
|
|
#define RHIF_STATIC_BLOCK 0x2
|
|
|
|
typedef struct _rh_stats {
|
|
unsigned long start;
|
|
int size;
|
|
const char *owner;
|
|
} rh_stats_t;
|
|
|
|
#define RHGS_FREE 0
|
|
#define RHGS_TAKEN 1
|
|
|
|
/* Create a remote heap dynamically */
|
|
extern rh_info_t *rh_create(unsigned int alignment);
|
|
|
|
/* Destroy a remote heap, created by rh_create() */
|
|
extern void rh_destroy(rh_info_t * info);
|
|
|
|
/* Initialize in place a remote info block */
|
|
extern void rh_init(rh_info_t * info, unsigned int alignment, int max_blocks,
|
|
rh_block_t * block);
|
|
|
|
/* Attach a free region to manage */
|
|
extern int rh_attach_region(rh_info_t * info, unsigned long start, int size);
|
|
|
|
/* Detach a free region */
|
|
extern unsigned long rh_detach_region(rh_info_t * info, unsigned long start, int size);
|
|
|
|
/* Allocate the given size from the remote heap (with alignment) */
|
|
extern unsigned long rh_alloc_align(rh_info_t * info, int size, int alignment,
|
|
const char *owner);
|
|
|
|
/* Allocate the given size from the remote heap */
|
|
extern unsigned long rh_alloc(rh_info_t * info, int size, const char *owner);
|
|
|
|
/* Allocate the given size from the given address */
|
|
extern unsigned long rh_alloc_fixed(rh_info_t * info, unsigned long start, int size,
|
|
const char *owner);
|
|
|
|
/* Free the allocated area */
|
|
extern int rh_free(rh_info_t * info, unsigned long start);
|
|
|
|
/* Get stats for debugging purposes */
|
|
extern int rh_get_stats(rh_info_t * info, int what, int max_stats,
|
|
rh_stats_t * stats);
|
|
|
|
/* Simple dump of remote heap info */
|
|
extern void rh_dump(rh_info_t * info);
|
|
|
|
/* Set owner of taken block */
|
|
extern int rh_set_owner(rh_info_t * info, unsigned long start, const char *owner);
|
|
|
|
#endif /* __ASM_PPC_RHEAP_H__ */
|