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    section .text:CODE:ROOT
31;/**************************************************************************/
32;/*                                                                        */
33;/*  FUNCTION                                               RELEASE        */
34;/*                                                                        */
35;/*    _tx_thread_interrupt_control                         RXv2/IAR       */
36;/*                                                           6.1.11       */
37;/*  AUTHOR                                                                */
38;/*                                                                        */
39;/*    William E. Lamie, Microsoft Corporation                             */
40;/*                                                                        */
41;/*  DESCRIPTION                                                           */
42;/*                                                                        */
43;/*    This function is responsible for changing the interrupt lockout     */
44;/*    posture of the system.                                              */
45;/*                                                                        */
46;/*  INPUT                                                                 */
47;/*                                                                        */
48;/*    new_posture                           New interrupt lockout posture */
49;/*                                                                        */
50;/*  OUTPUT                                                                */
51;/*                                                                        */
52;/*    old_posture                           Old interrupt lockout posture */
53;/*                                                                        */
54;/*  CALLS                                                                 */
55;/*                                                                        */
56;/*    None                                                                */
57;/*                                                                        */
58;/*  CALLED BY                                                             */
59;/*                                                                        */
60;/*    Application Code                                                    */
61;/*                                                                        */
62;/*  RELEASE HISTORY                                                       */
63;/*                                                                        */
64;/*    DATE              NAME                      DESCRIPTION             */
65;/*                                                                        */
66;/*  12-30-2020     William E. Lamie         Initial Version 6.1.3         */
67;/*  10-15-2021     William E. Lamie         Modified comment(s),          */
68;/*                                            resulting in version 6.1.9  */
69;/*  01-31-2022     William E. Lamie         Modified comment(s),          */
70;/*                                            resulting in version 6.1.10 */
71;/*  04-25-2022     William E. Lamie         Modified comment(s),          */
72;/*                                            resulting in version 6.1.11 */
73;/*                                                                        */
74;/**************************************************************************/
75;UINT   _tx_thread_interrupt_control(UINT new_posture)
76;{
77    public __tx_thread_interrupt_control
78__tx_thread_interrupt_control:
79;
80;    /* Pickup current interrupt lockout posture.  */
81;
82
83    MVFC      PSW, R2           ; Save PSW to R2
84    MOV.L     R2, R3            ; Make a copy of PSW in r3
85
86;
87;    /* Apply the new interrupt posture.  */
88;
89
90    BTST    #16, R1             ; Test I bit of PSW of "new posture"
91    BMNE    #16, R2             ; Conditionally set I bit of intermediate posture
92
93    MVTC    R2, PSW             ; Save intermediate posture to PSW
94
95    MOV.L   R3,R1               ; Get original SR
96    RTS                         ; Return to caller
97;}
98    END
99