LXR linux/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
  19typedef struct _rh_block {
  20        struct list_head list;
  21        unsigned long start;
  22        int size;
  23        const char *owner;
  24} rh_block_t;
  25
  26typedef 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
  40typedef 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 */
  50extern rh_info_t *rh_create(unsigned int alignment);
  51
  52/* Destroy a remote heap, created by rh_create() */
  53extern void rh_destroy(rh_info_t * info);
  54
  55/* Initialize in place a remote info block */
  56extern 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 */
  60extern int rh_attach_region(rh_info_t * info, unsigned long start, int size);
  61
  62/* Detach a free region */
  63extern 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) */
  66extern 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 */
  70extern unsigned long rh_alloc(rh_info_t * info, int size, const char *owner);
  71
  72/* Allocate the given size from the given address */
  73extern unsigned long rh_alloc_fixed(rh_info_t * info, unsigned long start, int size,
  74                            const char *owner);
  75
  76/* Free the allocated area */
  77extern int rh_free(rh_info_t * info, unsigned long start);
  78
  79/* Get stats for debugging purposes */
  80extern 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 */
  84extern void rh_dump(rh_info_t * info);
  85
  86/* Simple dump of remote info block */
  87void rh_dump_blk(rh_info_t *info, rh_block_t *blk);
  88
  89/* Set owner of taken block */
  90extern int rh_set_owner(rh_info_t * info, unsigned long start, const char *owner);
  91
  92#endif                          /* __ASM_PPC_RHEAP_H__ */
  93