| Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 1 | /* |
| Dan Handley | ab2d31e | 2013-12-02 19:25:12 +0000 | [diff] [blame] | 2 | * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved. |
| Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #ifndef __BAKERY_LOCK_H__ |
| 32 | #define __BAKERY_LOCK_H__ |
| 33 | |
| 34 | #include <platform.h> |
| 35 | |
| 36 | #define BAKERY_LOCK_MAX_CPUS PLATFORM_CORE_COUNT |
| 37 | |
| 38 | #ifndef __ASSEMBLY__ |
| 39 | typedef struct { |
| 40 | volatile int owner; |
| 41 | volatile char entering[BAKERY_LOCK_MAX_CPUS]; |
| 42 | volatile unsigned number[BAKERY_LOCK_MAX_CPUS]; |
| 43 | } bakery_lock; |
| 44 | |
| 45 | #define NO_OWNER (-1) |
| 46 | |
| 47 | void bakery_lock_init(bakery_lock* bakery); |
| 48 | /* Check whether a lock is held. Mainly used for debug purpose. */ |
| 49 | int bakery_lock_held(unsigned long mpidr, const bakery_lock * bakery); |
| 50 | void bakery_lock_get(unsigned long mpidr, bakery_lock* bakery); |
| 51 | void bakery_lock_release(unsigned long mpidr, bakery_lock* bakery); |
| 52 | int bakery_lock_try(unsigned long mpidr, bakery_lock* bakery); |
| 53 | #endif /*__ASSEMBLY__*/ |
| 54 | |
| 55 | #endif /* __BAKERY_LOCK_H__ */ |