2013-01-08 22:40:58 +08:00
|
|
|
//*****************************************************************************
|
|
|
|
|
//
|
|
|
|
|
// 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
|
