release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/tidspbridge/include/dspbridge/gb.h

   1 /*
   2  * gb.h
   3  *
   4  * DSP-BIOS Bridge driver support functions for TI OMAP processors.
   5  *
   6  * Generic bitmap manager.
   7  *
   8  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   9  *
  10  * This package is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  16  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  17  */
  18
  19 #ifndef GB_
  20 #define GB_
  21
  22 #define GB_NOBITS (~0)
  23 #include <dspbridge/host_os.h>
  24
  25 struct gb_t_map;
  26
  27 /*
  28  *  ======== gb_clear ========
  29  *  Clear the bit in position bitn in the bitmap map.  Bit positions are
  30  *  zero based.
  31  */
  32
  33 extern void gb_clear(struct gb_t_map *map, u32 bitn);
  34
  35 /*
  36  *  ======== gb_create ========
  37  *  Create a bit map with len bits.  Initially all bits are cleared.
  38  */
  39
  40 extern struct gb_t_map *gb_create(u32 len);
  41
  42 /*
  43  *  ======== gb_delete ========
  44  *  Delete previously created bit map
  45  */
  46
  47 extern void gb_delete(struct gb_t_map *map);
  48
  49 /*
  50  *  ======== gb_findandset ========
  51  *  Finds a clear bit, sets it, and returns the position
  52  */
  53
  54 extern u32 gb_findandset(struct gb_t_map *map);
  55
  56 /*
  57  *  ======== gb_minclear ========
  58  *  gb_minclear returns the minimum clear bit position.  If no bit is
  59  *  clear, gb_minclear returns -1.
  60  */
  61 extern u32 gb_minclear(struct gb_t_map *map);
  62
  63 /*
  64  *  ======== gb_set ========
  65  *  Set the bit in position bitn in the bitmap map.  Bit positions are
  66  *  zero based.
  67  */
  68
  69 extern void gb_set(struct gb_t_map *map, u32 bitn);
  70
  71 /*
  72  *  ======== gb_test ========
  73  *  Returns TRUE if the bit in position bitn is set in map; otherwise
  74  *  gb_test returns FALSE.  Bit positions are zero based.
  75  */
  76
  77 extern bool gb_test(struct gb_t_map *map, u32 bitn);
  78
  79 #endif /*GB_ */