nes-proj/cpu/cc2538/cpu.c

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/*
* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* 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.
*/
/**
* \addtogroup cc2538-cpu
* @{
*
* \file
* Implementations of interrupt control on the cc2538 Cortex-M3 micro
*/
/*---------------------------------------------------------------------------*/
unsigned long __attribute__((naked))
cpu_cpsie(void)
{
unsigned long ret;
/* Read PRIMASK and enable interrupts */
__asm(" mrs r0, PRIMASK\n"
" cpsie i\n"
" bx lr\n"
: "=r" (ret));
/* The inline asm returns, we never reach here.
* We add a return statement to keep the compiler happy */
return ret;
}
/*---------------------------------------------------------------------------*/
unsigned long __attribute__((naked))
cpu_cpsid(void)
{
unsigned long ret;
/* Read PRIMASK and disable interrupts */
__asm(" mrs r0, PRIMASK\n"
" cpsid i\n"
" bx lr\n"
: "=r" (ret));
/* The inline asm returns, we never reach here.
* We add a return statement to keep the compiler happy */
return ret;
}
/*---------------------------------------------------------------------------*/
/** @} */