diff options
Diffstat (limited to 'firmware/target/arm')
-rw-r--r-- | firmware/target/arm/imx233/kernel-imx233.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/firmware/target/arm/imx233/kernel-imx233.h b/firmware/target/arm/imx233/kernel-imx233.h new file mode 100644 index 0000000000..3c62c1597c --- /dev/null +++ b/firmware/target/arm/imx233/kernel-imx233.h | |||
@@ -0,0 +1,45 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2011 by Amaury Pouly | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | #ifndef __KERNEL_IMX233__ | ||
22 | #define __KERNEL_IMX233__ | ||
23 | |||
24 | #include "kernel.h" | ||
25 | |||
26 | /* The i.MX233 uses in several places virtual channels to multiplex the work. | ||
27 | * To arbiter the use of the different channels, we use a simple channel arbiter | ||
28 | * based on a semaphore to count the number of channels in use, and a bitmask | ||
29 | * protected by a mutex */ | ||
30 | struct channel_arbiter_t | ||
31 | { | ||
32 | struct semaphore sema; | ||
33 | struct mutex mutex; | ||
34 | unsigned free_bm; | ||
35 | int count; | ||
36 | }; | ||
37 | |||
38 | void arbiter_init(struct channel_arbiter_t *a, unsigned count); | ||
39 | // doesn't check in use ! | ||
40 | void arbiter_reserve(struct channel_arbiter_t *a, unsigned channel); | ||
41 | /* return channel on success and OBJ_WAIT_TIMEOUT on failure */ | ||
42 | int arbiter_acquire(struct channel_arbiter_t *a, int timeout); | ||
43 | void arbiter_release(struct channel_arbiter_t *a, int channel); | ||
44 | |||
45 | #endif /* __KERNEL_IMX233__ */ \ No newline at end of file | ||