1;/***************************************************************************
2; * Copyright (c) 2024 Microsoft Corporation
3; *
4; * This program and the accompanying materials are made available under the
5; * terms of the MIT License which is available at
6; * https://opensource.org/licenses/MIT.
7; *
8; * SPDX-License-Identifier: MIT
9; **************************************************************************/
10;
11;
12;/**************************************************************************/
13;/**************************************************************************/
14;/**                                                                       */
15;/** ThreadX Component                                                     */
16;/**                                                                       */
17;/**   Thread                                                              */
18;/**                                                                       */
19;/**************************************************************************/
20;/**************************************************************************/
21;
22;#define TX_SOURCE_CODE
23;
24;
25;/* Include necessary system files.  */
26;
27;#include "tx_api.h"
28;#include "tx_thread.h"
29;
30;
31#ifdef TX_ENABLE_FIQ_SUPPORT
32INT_MASK        DEFINE      0xC0                ; Interrupt bit mask
33#else
34INT_MASK        DEFINE      0x80                ; Interrupt bit mask
35#endif
36;
37;
38;/**************************************************************************/
39;/*                                                                        */
40;/*  FUNCTION                                               RELEASE        */
41;/*                                                                        */
42;/*    _tx_thread_interrupt_control                         ARM9/IAR       */
43;/*                                                           6.1          */
44;/*  AUTHOR                                                                */
45;/*                                                                        */
46;/*    William E. Lamie, Microsoft Corporation                             */
47;/*                                                                        */
48;/*  DESCRIPTION                                                           */
49;/*                                                                        */
50;/*    This function is responsible for changing the interrupt lockout     */
51;/*    posture of the system.                                              */
52;/*                                                                        */
53;/*  INPUT                                                                 */
54;/*                                                                        */
55;/*    new_posture                           New interrupt lockout posture */
56;/*                                                                        */
57;/*  OUTPUT                                                                */
58;/*                                                                        */
59;/*    old_posture                           Old interrupt lockout posture */
60;/*                                                                        */
61;/*  CALLS                                                                 */
62;/*                                                                        */
63;/*    None                                                                */
64;/*                                                                        */
65;/*  CALLED BY                                                             */
66;/*                                                                        */
67;/*    Application Code                                                    */
68;/*                                                                        */
69;/*  RELEASE HISTORY                                                       */
70;/*                                                                        */
71;/*    DATE              NAME                      DESCRIPTION             */
72;/*                                                                        */
73;/*  09-30-2020     William E. Lamie         Initial Version 6.1           */
74;/*                                                                        */
75;/**************************************************************************/
76;UINT   _tx_thread_interrupt_control(UINT new_posture)
77;{
78    RSEG    .text:CODE:NOROOT(2)
79    PUBLIC  _tx_thread_interrupt_control
80    CODE32
81_tx_thread_interrupt_control
82;
83;    /* Pickup current interrupt lockout posture.  */
84;
85    MRS     r3, CPSR                            ; Pickup current CPSR
86    BIC     r1, r3, #INT_MASK                   ; Clear interrupt lockout bits
87    ORR     r1, r1, r0                          ; Or-in new interrupt lockout bits
88;
89;    /* Apply the new interrupt posture.  */
90;
91    MSR     CPSR_cxsf, r1                       ; Setup new CPSR
92    AND     r0, r3, #INT_MASK                   ; Return previous interrupt mask
93#ifdef TX_THUMB
94    BX      lr                                  ; Return to caller
95#else
96    MOV     pc, lr                              ; Return to caller
97#endif
98;
99;}
100;
101;
102    END
103