ports_arch/ARMv7-M/threadx/ghs/src/tx_thread_interrupt_control.arm


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72

/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** ThreadX Component                                                     */
/**                                                                       */
/**   Thread                                                              */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

    .text
    .align 4
/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _tx_thread_interrupt_control                     Cortex-Mx/GHS      */
/*                                                           6.1.7        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Scott Larson, Microsoft Corporation                                 */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function is responsible for changing the interrupt lockout     */
/*    posture of the system.                                              */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    new_posture                           New interrupt lockout posture */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    old_posture                           Old interrupt lockout posture */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  06-02-2021      Scott Larson            Initial Version 6.1.7         */
/*                                                                        */
/**************************************************************************/
// UINT   _tx_thread_interrupt_control(UINT new_posture)
// {
    .globl  _tx_thread_interrupt_control
_tx_thread_interrupt_control:
    MRS     r1, PRIMASK                         // Pickup current interrupt lockout
    MSR     PRIMASK, r0                         // Apply the new interrupt lockout
    MOV     r0, r1                              // Transfer old to return register
    BX      lr                                  // Return to caller
// }
    .type _tx_thread_interrupt_control,$function
    .size _tx_thread_interrupt_control,.-_tx_thread_interrupt_control