arch/powerpc/include/asm/rheap.h

   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 /* Set owner of taken block */
  87 extern int rh_set_owner(rh_info_t * info, unsigned long start, const char *owner);
  88
  89 #endif                          /* __ASM_PPC_RHEAP_H__ */