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#ifdef TX_INCLUDE_USER_DEFINE_FILE
22#include "tx_user.h"
23#endif
24
25#ifdef TX_ENABLE_FIQ_SUPPORT
26DISABLE_INTS    =           0xC0                @ IRQ & FIQ interrupts disabled
27#else
28DISABLE_INTS    =           0x80                @ IRQ interrupts disabled
29#endif
30@
31@
32@/* Define the 16-bit Thumb mode veneer for _tx_thread_interrupt_disable for
33@   applications calling this function from to 16-bit Thumb mode.  */
34@
35    .text
36    .align 2
37    .global $_tx_thread_interrupt_disable
38$_tx_thread_interrupt_disable:
39        .thumb
40     BX        pc                               @ Switch to 32-bit mode
41     NOP                                        @
42    .arm
43     STMFD     sp!, {lr}                        @ Save return address
44     BL        _tx_thread_interrupt_disable     @ Call _tx_thread_interrupt_disable function
45     LDMFD     sp!, {lr}                        @ Recover saved return address
46     BX        lr                               @ Return to 16-bit caller
47@
48@
49    .text
50    .align 2
51@/**************************************************************************/
52@/*                                                                        */
53@/*  FUNCTION                                               RELEASE        */
54@/*                                                                        */
55@/*    _tx_thread_interrupt_disable                         ARM9/GNU       */
56@/*                                                           6.2.1        */
57@/*  AUTHOR                                                                */
58@/*                                                                        */
59@/*    William E. Lamie, Microsoft Corporation                             */
60@/*                                                                        */
61@/*  DESCRIPTION                                                           */
62@/*                                                                        */
63@/*    This function is responsible for disabling interrupts               */
64@/*                                                                        */
65@/*  INPUT                                                                 */
66@/*                                                                        */
67@/*    None                                                                */
68@/*                                                                        */
69@/*  OUTPUT                                                                */
70@/*                                                                        */
71@/*    old_posture                           Old interrupt lockout posture */
72@/*                                                                        */
73@/*  CALLS                                                                 */
74@/*                                                                        */
75@/*    None                                                                */
76@/*                                                                        */
77@/*  CALLED BY                                                             */
78@/*                                                                        */
79@/*    Application Code                                                    */
80@/*                                                                        */
81@/*  RELEASE HISTORY                                                       */
82@/*                                                                        */
83@/*    DATE              NAME                      DESCRIPTION             */
84@/*                                                                        */
85@/*  09-30-2020     William E. Lamie         Initial Version 6.1           */
86@/*  03-08-2023     Cindy Deng               Modified comment(s), added    */
87@/*                                            #include tx_user.h,         */
88@/*                                            resulting in version 6.2.1  */
89@/*                                                                        */
90@/**************************************************************************/
91@UINT   _tx_thread_interrupt_disable(void)
92@{
93    .global _tx_thread_interrupt_disable
94    .type   _tx_thread_interrupt_disable,function
95_tx_thread_interrupt_disable:
96@
97@    /* Pickup current interrupt lockout posture.  */
98@
99    MRS     r0, CPSR                            @ Pickup current CPSR
100@
101@    /* Mask interrupts.  */
102@
103    ORR     r1, r0, #DISABLE_INTS               @ Mask interrupts
104    MSR     CPSR_cxsf, r1                       @ Setup new CPSR
105#ifdef __THUMB_INTERWORK
106    BX      lr                                  @ Return to caller
107#else
108    MOV     pc, lr                              @ Return to caller
109#endif
110@}
111
112
113