ports/c667x/ccs/src/tx_thread_interrupt_control.asm


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;/***************************************************************************
; * 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                                                              */
;/**                                                                       */
;/**************************************************************************/
;/**************************************************************************/
;
;#define TX_SOURCE_CODE
;
;
;/* Include necessary system files.  */
;
;#include "tx_api.h"
;#include "tx_thread.h"
;
;
FP          .set    A15
DP          .set    B14
SP          .set    B15
;
;
    .sect   ".text"
;/**************************************************************************/
;/*                                                                        */
;/*  FUNCTION                                               RELEASE        */
;/*                                                                        */
;/*    _tx_thread_interrupt_control                        C667x/TI        */
;/*                                                           6.1          */
;/*  AUTHOR                                                                */
;/*                                                                        */
;/*    William E. Lamie, 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             */
;/*                                                                        */
;/*  09-30-2020     William E. Lamie         Initial Version 6.1           */
;/*                                                                        */
;/**************************************************************************/
;UINT   _tx_thread_interrupt_control(UINT new_posture)
;{
    .global _tx_thread_interrupt_control
_tx_thread_interrupt_control:
;
;    /* Pickup current interrupt lockout posture.  */
;
        MVC         CSR,B0                              ; Pickup current CSR
;
;    /* Apply the new interrupt posture.  */
;
        B           B3                                  ; Return to caller
        AND         -2,B0,B0                            ; Clear GIE bit
        OR          A4,B0,B0                            ; Build new interrupt posture
        MVC         CSR,B1                              ; Return previous posture
        MVC         B0,CSR                              ; Apply new interrupt posture
        AND         1,B1,A4                             ; Clear non-GIE bits
;
;}