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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* misc_arm.c
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
/*
* Set the Current Program Status Register.
* old way assumed argument was in R0:
* asm(" msr CPSR_c, r0");
*/
void
putpsr(unsigned long psr)
{
volatile unsigned register reg;
reg = psr;
asm volatile ("msr CPSR_c, %0" : "=r" (reg));
}
/*
* Return the Current Program Status Register.
* old way assumed return in R0:
* asm(" mrs r0, CPSR");
*/
unsigned long
getpsr(void)
{
volatile unsigned register reg;
asm volatile ("mrs %0, CPSR" : "=r" (reg));
return(reg);
}
/* getsp():
* Return the current stack pointer.
* oldway: asm(" mov r0, r13");
*/
unsigned long
getsp(void)
{
volatile unsigned register reg;
asm volatile ("mov %0, r13" : "=r" (reg));
return(reg);
}
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