1/**************************************************************************/
2/*                                                                        */
3/*       Copyright (c) Microsoft Corporation. All rights reserved.        */
4/*                                                                        */
5/*       This software is licensed under the Microsoft Software License   */
6/*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
7/*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
8/*       and in the root directory of this software.                      */
9/*                                                                        */
10/**************************************************************************/
11
12
13/**************************************************************************/
14/**************************************************************************/
15/**                                                                       */
16/** ThreadX Component                                                     */
17/**                                                                       */
18/**   Thread                                                              */
19/**                                                                       */
20/**************************************************************************/
21/**************************************************************************/
22
23/* #define TX_SOURCE_CODE  */
24
25
26/* Include necessary system files.  */
27
28/*  #include "tx_api.h"
29    #include "tx_thread.h"  */
30
31RETURN_MASK     DEFINE          0x0000000F
32SET_SR_MASK     DEFINE          0xFFFFFFF0
33
34    SECTION `.text`:CODE:REORDER:NOROOT(2)
35    CODE
36/**************************************************************************/
37/*                                                                        */
38/*  FUNCTION                                               RELEASE        */
39/*                                                                        */
40/*    _tx_thread_interrupt_control                       RISC-V32/IAR     */
41/*                                                           6.1          */
42/*  AUTHOR                                                                */
43/*                                                                        */
44/*    William E. Lamie, Microsoft Corporation                             */
45/*    Tom van Leeuwen, Technolution B.V.                                  */
46/*                                                                        */
47/*  DESCRIPTION                                                           */
48/*                                                                        */
49/*    This function is responsible for changing the interrupt lockout     */
50/*    posture of the system.                                              */
51/*                                                                        */
52/*  INPUT                                                                 */
53/*                                                                        */
54/*    new_posture                           New interrupt lockout posture */
55/*                                                                        */
56/*  OUTPUT                                                                */
57/*                                                                        */
58/*    old_posture                           Old interrupt lockout posture */
59/*                                                                        */
60/*  CALLS                                                                 */
61/*                                                                        */
62/*    None                                                                */
63/*                                                                        */
64/*  CALLED BY                                                             */
65/*                                                                        */
66/*    Application Code                                                    */
67/*                                                                        */
68/*  RELEASE HISTORY                                                       */
69/*                                                                        */
70/*    DATE              NAME                      DESCRIPTION             */
71/*                                                                        */
72/*  09-30-2020     William E. Lamie         Initial Version 6.1           */
73/*                                                                        */
74/**************************************************************************/
75/* UINT   _tx_thread_interrupt_control(UINT new_posture)
76{  */
77    PUBLIC  _tx_thread_interrupt_control
78_tx_thread_interrupt_control:
79    /* Pickup current interrupt lockout posture.  */
80
81    csrr    t0, mstatus
82    mv      t1, t0                                      ; Save original mstatus for return
83
84    /* Apply the new interrupt posture.  */
85
86    li      t2, SET_SR_MASK                             ; Build set SR mask
87    and     t0, t0, t2                                  ; Isolate interrupt lockout bits
88    or      t0, t0, a0                                  ; Put new lockout bits in
89    csrw    mstatus, t0
90    andi    a0, t1, RETURN_MASK                         ; Return original mstatus.
91    ret
92/* }  */
93    END
94