1 /*
2  * include/asm-ppc/rheap.h
3  *
4  * Header file for the implementation of a remote heap.
5  *
6  * Author: Pantelis Antoniou <panto@intracom.gr>
7  *
8  * 2004 (c) INTRACOM S.A. Greece. This file is licensed under
9  * the terms of the GNU General Public License version 2. This program
10  * is licensed "as is" without any warranty of any kind, whether express
11  * or implied.
12  */
13 
14 #ifndef __ASM_PPC_RHEAP_H__
15 #define __ASM_PPC_RHEAP_H__
16 
17 #include <linux/list.h>
18 
19 typedef struct _rh_block {
20 	struct list_head list;
21 	unsigned long start;
22 	int size;
23 	const char *owner;
24 } rh_block_t;
25 
26 typedef struct _rh_info {
27 	unsigned int alignment;
28 	int max_blocks;
29 	int empty_slots;
30 	rh_block_t *block;
31 	struct list_head empty_list;
32 	struct list_head free_list;
33 	struct list_head taken_list;
34 	unsigned int flags;
35 } rh_info_t;
36 
37 #define RHIF_STATIC_INFO	0x1
38 #define RHIF_STATIC_BLOCK	0x2
39 
40 typedef struct _rh_stats {
41 	unsigned long start;
42 	int size;
43 	const char *owner;
44 } rh_stats_t;
45 
46 #define RHGS_FREE	0
47 #define RHGS_TAKEN	1
48 
49 /* Create a remote heap dynamically */
50 extern rh_info_t *rh_create(unsigned int alignment);
51 
52 /* Destroy a remote heap, created by rh_create() */
53 extern void rh_destroy(rh_info_t * info);
54 
55 /* Initialize in place a remote info block */
56 extern void rh_init(rh_info_t * info, unsigned int alignment, int max_blocks,
57 		    rh_block_t * block);
58 
59 /* Attach a free region to manage */
60 extern int rh_attach_region(rh_info_t * info, unsigned long start, int size);
61 
62 /* Detach a free region */
63 extern unsigned long rh_detach_region(rh_info_t * info, unsigned long start, int size);
64 
65 /* Allocate the given size from the remote heap (with alignment) */
66 extern unsigned long rh_alloc_align(rh_info_t * info, int size, int alignment,
67 		const char *owner);
68 
69 /* Allocate the given size from the remote heap */
70 extern unsigned long rh_alloc(rh_info_t * info, int size, const char *owner);
71 
72 /* Allocate the given size from the given address */
73 extern unsigned long rh_alloc_fixed(rh_info_t * info, unsigned long start, int size,
74 			    const char *owner);
75 
76 /* Free the allocated area */
77 extern int rh_free(rh_info_t * info, unsigned long start);
78 
79 /* Get stats for debugging purposes */
80 extern int rh_get_stats(rh_info_t * info, int what, int max_stats,
81 			rh_stats_t * stats);
82 
83 /* Simple dump of remote heap info */
84 extern void rh_dump(rh_info_t * info);
85 
86 /* Simple dump of remote info block */
87 void rh_dump_blk(rh_info_t *info, rh_block_t *blk);
88 
89 /* Set owner of taken block */
90 extern int rh_set_owner(rh_info_t * info, unsigned long start, const char *owner);
91 
92 #endif				/* __ASM_PPC_RHEAP_H__ */
93