| Duy Truong | f3ac7b3 | 2013-02-13 01:07:28 -0800 | [diff] [blame^] | 1 | /* Copyright (c) 2012, The Linux Foundation. All rights reserved. |
| Channagoud Kadabi | e1ecef5 | 2012-02-04 15:54:34 +0530 | [diff] [blame] | 2 | * |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions are |
| 5 | * met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer in the documentation and/or other materials provided |
| 11 | * with the distribution. |
| Duy Truong | f3ac7b3 | 2013-02-13 01:07:28 -0800 | [diff] [blame^] | 12 | * * Neither the name of The Linux Foundation nor the names of its |
| Channagoud Kadabi | e1ecef5 | 2012-02-04 15:54:34 +0530 | [diff] [blame] | 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <sys/types.h> |
| 31 | |
| 32 | #define RLOCK_CHUNK_NAME_LENGTH 10 |
| 33 | #define RLOCK_CHUNK_NAME "PMIC_SSBI" |
| 34 | #define DEK_LOCK_REQUEST 1 |
| 35 | #define DEK_LOCK_YIELD (!DEK_LOCK_REQUEST) |
| 36 | #define DEK_YIELD_TURN_SELF 0 |
| 37 | |
| 38 | struct rlock_chunk_header { |
| 39 | uint32_t size; |
| 40 | char name[RLOCK_CHUNK_NAME_LENGTH]; |
| 41 | uint32_t lock; |
| 42 | uint32_t reserved; |
| 43 | uint32_t type; |
| 44 | uint32_t version; |
| 45 | }; |
| 46 | struct dek_spinlock { |
| 47 | volatile uint8_t self_lock; |
| 48 | volatile uint8_t other_lock; |
| 49 | volatile uint8_t next_yield; |
| 50 | uint8_t pad; |
| 51 | }; |
| 52 | |
| 53 | typedef union { |
| 54 | volatile uint32_t lock; |
| 55 | struct dek_spinlock dek; |
| 56 | } raw_remote_spinlock_t; |
| 57 | |
| 58 | typedef raw_remote_spinlock_t *remote_spinlock_t; |
| 59 | |
| 60 | remote_spinlock_t rlock; |