text: /* ----------------------------------------------------------------------------
   * Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved.
   * Description: Interrupt Operations HeadFile
   * Author: Huawei LiteOS Team
   * Create: 2020-01-14
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   * 1. Redistributions of source code must retain the above copyright notice, this list of
   * conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice, this list
   * of conditions and the following disclaimer in the documentation and/or other materials
   * provided with the distribution.
   * 3. Neither the name of the copyright holder nor the names of its contributors may be used
   * to endorse or promote products derived from this software without specific prior written
   * permission.
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   * --------------------------------------------------------------------------- */
  /* ----------------------------------------------------------------------------
   * Notice of Export Control Law
   * ===============================================
   * Huawei LiteOS may be subject to applicable export control laws and regulations, which might
   * include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
   * Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
   * applicable export control laws and regulations.
   * --------------------------------------------------------------------------- */
  
  #ifndef _ARCH_INTERRUPT_H
  #define _ARCH_INTERRUPT_H
  
  #include "los_typedef.h"
  #include "arch/regs.h"
  
  #ifdef __cplusplus
  #if __cplusplus
  extern "C" {
  #endif /* __cplusplus */
  #endif /* __cplusplus */
  
  #define LOSCFG_ARM_ARCH  __ARM_ARCH
  
  /* CPU interrupt mask handle implementation */
  #if LOSCFG_ARM_ARCH >= 6
  
  STATIC INLINE UINT32 ArchIntLock(VOID)
  {
      UINT32 intSave;
      __asm__ __volatile__(
          "mrs    %0, cpsr      \n"
          "cpsid  if              "
          : "=r"(intSave)
          :
          : "memory");
      return intSave;
  }
  
  STATIC INLINE UINT32 ArchIntUnlock(VOID)
  {
      UINT32 intSave;
      __asm__ __volatile__(
          "mrs    %0, cpsr      \n"
          "cpsie  if              "
          : "=r"(intSave)
          :
          : "memory");
      return intSave;
  }
  
  #else
  
  STATIC INLINE UINT32 ArchIntLock(VOID)
  {
      UINT32 intSave, temp;
      __asm__ __volatile__(
          "mrs    %0, cpsr      \n"
          "orr    %1, %0, #0xc0 \n"
          "msr    cpsr_c, %1      "
          :"=r"(intSave),  "=r"(temp)
          : :"memory");
      return intSave;
  }
  
  STATIC INLINE UINT32 ArchIntUnlock(VOID)
  {
      UINT32 intSave;
      __asm__ __volatile__(
          "mrs    %0, cpsr      \n"
          "bic    %0, %0, #0xc0 \n"
          "msr    cpsr_c, %0      "
          : "=r"(intSave)
          : : "memory");
      return intSave;
  }
  
  #endif
  
  STATIC INLINE VOID ArchIntRestore(UINT32 intSave)
  {
      __asm__ __volatile__(
          "msr    cpsr_c, %0      "
          :
          : "r"(intSave)
          : "memory");
  }
  
  STATIC INLINE UINT32 OsIntLocked(VOID)
  {
      UINT32 intSave;
  
      __asm__ __volatile__(
          "mrs    %0, cpsr        "
          : "=r" (intSave)
          :
          : "memory", "cc");
  
      return intSave & PSR_I_BIT;
  }
  
  #ifdef __cplusplus
  #if __cplusplus
  }
  #endif /* __cplusplus */
  #endif /* __cplusplus */
  
  #endif /* _ARCH_INTERRUPT_H */