1 /**
2 * \file
3 *
4 * \brief Critical sections related functionality implementation.
5 *
6 * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
7 *
8 * \asf_license_start
9 *
10 * \page License
11 *
12 * Subject to your compliance with these terms, you may use Microchip
13 * software and any derivatives exclusively with Microchip products.
14 * It is your responsibility to comply with third party license terms applicable
15 * to your use of third party software (including open source software) that
16 * may accompany Microchip software.
17 *
18 * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
19 * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
20 * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
21 * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
22 * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
23 * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
24 * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
25 * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
26 * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
27 * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
28 * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
29 *
30 * \asf_license_stop
31 *
32 */
33
34 #include "hal_atomic.h"
35
36 /**
37 * \brief Driver version
38 */
39 #define DRIVER_VERSION 0x00000001u
40
41 /**
42 * \brief Disable interrupts, enter critical section
43 */
atomic_enter_critical(hal_atomic_t volatile * atomic)44 void atomic_enter_critical(hal_atomic_t volatile *atomic)
45 {
46 *atomic = __get_PRIMASK();
47 __disable_irq();
48 __DMB();
49 }
50
51 /**
52 * \brief Exit atomic section
53 */
atomic_leave_critical(hal_atomic_t volatile * atomic)54 void atomic_leave_critical(hal_atomic_t volatile *atomic)
55 {
56 __DMB();
57 __set_PRIMASK(*atomic);
58 }
59
60 /**
61 * \brief Retrieve the current driver version
62 */
atomic_get_version(void)63 uint32_t atomic_get_version(void)
64 {
65 return DRIVER_VERSION;
66 }
67