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//*****************************************************************************
//
// cpu.c - Instruction wrappers for special CPU instructions needed by the
// drivers.
//
// Copyright (c) 2006-2011 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 8264 of the Stellaris Peripheral Driver Library.
//
//*****************************************************************************
#include "driverlib/cpu.h"
//*****************************************************************************
//
// Wrapper function for the CPSID instruction. Returns the state of PRIMASK
// on entry.
//
//*****************************************************************************
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
unsigned long __attribute__((naked))
CPUcpsid(void)
{
unsigned long ulRet;
//
// Read PRIMASK and disable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" cpsid i\n"
" bx lr\n"
: "=r" (ulRet));
//
// The return is handled in the inline assembly, but the compiler will
// still complain if there is not an explicit return here (despite the fact
// that this does not result in any code being produced because of the
// naked attribute).
//
return(ulRet);
}
#endif
#if defined(ewarm)
unsigned long
CPUcpsid(void)
{
//
// Read PRIMASK and disable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" cpsid i\n");
//
// "Warning[Pe940]: missing return statement at end of non-void function"
// is suppressed here to avoid putting a "bx lr" in the inline assembly
// above and a superfluous return statement here.
//
#pragma diag_suppress=Pe940
}
#pragma diag_default=Pe940
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm unsigned long
CPUcpsid(void)
{
//
// Read PRIMASK and disable interrupts.
//
mrs r0, PRIMASK;
cpsid i;
bx lr
}
#endif
#if defined(ccs)
unsigned long
CPUcpsid(void)
{
//
// Read PRIMASK and disable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" cpsid i\n"
" bx lr\n");
//
// The following keeps the compiler happy, because it wants to see a
// return value from this function. It will generate code to return
// a zero. However, the real return is the "bx lr" above, so the
// return(0) is never executed and the function returns with the value
// you expect in R0.
//
return(0);
}
#endif
//*****************************************************************************
//
// Wrapper function returning the state of PRIMASK (indicating whether
// interrupts are enabled or disabled).
//
//*****************************************************************************
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
unsigned long __attribute__((naked))
CPUprimask(void)
{
unsigned long ulRet;
//
// Read PRIMASK and disable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" bx lr\n"
: "=r" (ulRet));
//
// The return is handled in the inline assembly, but the compiler will
// still complain if there is not an explicit return here (despite the fact
// that this does not result in any code being produced because of the
// naked attribute).
//
return(ulRet);
}
#endif
#if defined(ewarm)
unsigned long
CPUprimask(void)
{
//
// Read PRIMASK and disable interrupts.
//
__asm(" mrs r0, PRIMASK\n");
//
// "Warning[Pe940]: missing return statement at end of non-void function"
// is suppressed here to avoid putting a "bx lr" in the inline assembly
// above and a superfluous return statement here.
//
#pragma diag_suppress=Pe940
}
#pragma diag_default=Pe940
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm unsigned long
CPUprimask(void)
{
//
// Read PRIMASK and disable interrupts.
//
mrs r0, PRIMASK;
bx lr
}
#endif
#if defined(ccs)
unsigned long
CPUprimask(void)
{
//
// Read PRIMASK and disable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" bx lr\n");
//
// The following keeps the compiler happy, because it wants to see a
// return value from this function. It will generate code to return
// a zero. However, the real return is the "bx lr" above, so the
// return(0) is never executed and the function returns with the value
// you expect in R0.
//
return(0);
}
#endif
//*****************************************************************************
//
// Wrapper function for the CPSIE instruction. Returns the state of PRIMASK
// on entry.
//
//*****************************************************************************
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
unsigned long __attribute__((naked))
CPUcpsie(void)
{
unsigned long ulRet;
//
// Read PRIMASK and enable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" cpsie i\n"
" bx lr\n"
: "=r" (ulRet));
//
// The return is handled in the inline assembly, but the compiler will
// still complain if there is not an explicit return here (despite the fact
// that this does not result in any code being produced because of the
// naked attribute).
//
return(ulRet);
}
#endif
#if defined(ewarm)
unsigned long
CPUcpsie(void)
{
//
// Read PRIMASK and enable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" cpsie i\n");
//
// "Warning[Pe940]: missing return statement at end of non-void function"
// is suppressed here to avoid putting a "bx lr" in the inline assembly
// above and a superfluous return statement here.
//
#pragma diag_suppress=Pe940
}
#pragma diag_default=Pe940
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm unsigned long
CPUcpsie(void)
{
//
// Read PRIMASK and enable interrupts.
//
mrs r0, PRIMASK;
cpsie i;
bx lr
}
#endif
#if defined(ccs)
unsigned long
CPUcpsie(void)
{
//
// Read PRIMASK and enable interrupts.
//
__asm(" mrs r0, PRIMASK\n"
" cpsie i\n"
" bx lr\n");
//
// The following keeps the compiler happy, because it wants to see a
// return value from this function. It will generate code to return
// a zero. However, the real return is the "bx lr" above, so the
// return(0) is never executed and the function returns with the value
// you expect in R0.
//
return(0);
}
#endif
//*****************************************************************************
//
// Wrapper function for the WFI instruction.
//
//*****************************************************************************
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
void __attribute__((naked))
CPUwfi(void)
{
//
// Wait for the next interrupt.
//
__asm(" wfi\n"
" bx lr\n");
}
#endif
#if defined(ewarm)
void
CPUwfi(void)
{
//
// Wait for the next interrupt.
//
__asm(" wfi\n");
}
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm void
CPUwfi(void)
{
//
// Wait for the next interrupt.
//
wfi;
bx lr
}
#endif
#if defined(ccs)
void
CPUwfi(void)
{
//
// Wait for the next interrupt.
//
__asm(" wfi\n");
}
#endif
//*****************************************************************************
//
// Wrapper function for writing the BASEPRI register.
//
//*****************************************************************************
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
void __attribute__((naked))
CPUbasepriSet(unsigned long ulNewBasepri)
{
//
// Set the BASEPRI register
//
__asm(" msr BASEPRI, r0\n"
" bx lr\n");
}
#endif
#if defined(ewarm)
void
CPUbasepriSet(unsigned long ulNewBasepri)
{
//
// Set the BASEPRI register
//
__asm(" msr BASEPRI, r0\n");
}
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm void
CPUbasepriSet(unsigned long ulNewBasepri)
{
//
// Set the BASEPRI register
//
msr BASEPRI, r0;
bx lr
}
#endif
#if defined(ccs)
void
CPUbasepriSet(unsigned long ulNewBasepri)
{
//
// Set the BASEPRI register
//
__asm(" msr BASEPRI, r0\n");
}
#endif
//*****************************************************************************
//
// Wrapper function for reading the BASEPRI register.
//
//*****************************************************************************
#if defined(codered) || defined(gcc) || defined(sourcerygxx)
unsigned long __attribute__((naked))
CPUbasepriGet(void)
{
unsigned long ulRet;
//
// Read BASEPRI
//
__asm(" mrs r0, BASEPRI\n"
" bx lr\n"
: "=r" (ulRet));
//
// The return is handled in the inline assembly, but the compiler will
// still complain if there is not an explicit return here (despite the fact
// that this does not result in any code being produced because of the
// naked attribute).
//
return(ulRet);
}
#endif
#if defined(ewarm)
unsigned long
CPUbasepriGet(void)
{
//
// Read BASEPRI
//
__asm(" mrs r0, BASEPRI\n");
//
// "Warning[Pe940]: missing return statement at end of non-void function"
// is suppressed here to avoid putting a "bx lr" in the inline assembly
// above and a superfluous return statement here.
//
#pragma diag_suppress=Pe940
}
#pragma diag_default=Pe940
#endif
#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm unsigned long
CPUbasepriGet(void)
{
//
// Read BASEPRI
//
mrs r0, BASEPRI;
bx lr
}
#endif
#if defined(ccs)
unsigned long
CPUbasepriGet(void)
{
//
// Read BASEPRI
//
__asm(" mrs r0, BASEPRI\n"
" bx lr\n");
//
// The following keeps the compiler happy, because it wants to see a
// return value from this function. It will generate code to return
// a zero. However, the real return is the "bx lr" above, so the
// return(0) is never executed and the function returns with the value
// you expect in R0.
//
return(0);
}
#endif
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