444 lines
11 KiB
C
444 lines
11 KiB
C
//*****************************************************************************
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//
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// cpu.c - Instruction wrappers for special CPU instructions needed by the
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// drivers.
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//
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// Copyright (c) 2006-2010 Texas Instruments Incorporated. All rights reserved.
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// Software License Agreement
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//
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// Texas Instruments (TI) is supplying this software for use solely and
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// exclusively on TI's microcontroller products. The software is owned by
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// TI and/or its suppliers, and is protected under applicable copyright
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// laws. You may not combine this software with "viral" open-source
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// software in order to form a larger program.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
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// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
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// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
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// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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// DAMAGES, FOR ANY REASON WHATSOEVER.
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//
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// This is part of revision 6459 of the Stellaris Peripheral Driver Library.
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//
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//*****************************************************************************
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#include "driverlib/cpu.h"
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//*****************************************************************************
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//
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// Wrapper function for the CPSID instruction. Returns the state of PRIMASK
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// on entry.
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//
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//*****************************************************************************
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#if defined(codered) || defined(gcc) || defined(sourcerygxx)
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unsigned long __attribute__((naked))
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CPUcpsid(void)
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{
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unsigned long ulRet;
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//
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// Read PRIMASK and disable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" cpsid i\n"
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" bx lr\n"
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: "=r" (ulRet));
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//
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// The return is handled in the inline assembly, but the compiler will
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// still complain if there is not an explicit return here (despite the fact
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// that this does not result in any code being produced because of the
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// naked attribute).
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//
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return(ulRet);
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}
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#endif
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#if defined(ewarm)
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unsigned long
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CPUcpsid(void)
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{
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//
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// Read PRIMASK and disable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" cpsid i\n");
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//
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// "Warning[Pe940]: missing return statement at end of non-void function"
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// is suppressed here to avoid putting a "bx lr" in the inline assembly
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// above and a superfluous return statement here.
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//
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#pragma diag_suppress=Pe940
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}
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#pragma diag_default=Pe940
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#endif
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#if defined(rvmdk) || defined(__ARMCC_VERSION)
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__asm unsigned long
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CPUcpsid(void)
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{
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//
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// Read PRIMASK and disable interrupts.
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//
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mrs r0, PRIMASK;
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cpsid i;
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bx lr
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}
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#endif
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#if defined(ccs)
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unsigned long
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CPUcpsid(void)
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{
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//
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// Read PRIMASK and disable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" cpsid i\n"
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" bx lr\n");
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//
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// The following keeps the compiler happy, because it wants to see a
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// return value from this function. It will generate code to return
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// a zero. However, the real return is the "bx lr" above, so the
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// return(0) is never executed and the function returns with the value
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// you expect in R0.
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//
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return(0);
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}
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#endif
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//*****************************************************************************
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//
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// Wrapper function returning the state of PRIMASK (indicating whether
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// interrupts are enabled or disabled).
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//
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//*****************************************************************************
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#if defined(codered) || defined(gcc) || defined(sourcerygxx)
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unsigned long __attribute__((naked))
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CPUprimask(void)
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{
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unsigned long ulRet;
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//
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// Read PRIMASK and disable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" bx lr\n"
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: "=r" (ulRet));
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//
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// The return is handled in the inline assembly, but the compiler will
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// still complain if there is not an explicit return here (despite the fact
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// that this does not result in any code being produced because of the
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// naked attribute).
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//
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return(ulRet);
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}
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#endif
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#if defined(ewarm)
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unsigned long
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CPUprimask(void)
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{
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//
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// Read PRIMASK and disable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n");
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//
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// "Warning[Pe940]: missing return statement at end of non-void function"
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// is suppressed here to avoid putting a "bx lr" in the inline assembly
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// above and a superfluous return statement here.
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//
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#pragma diag_suppress=Pe940
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}
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#pragma diag_default=Pe940
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#endif
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#if defined(rvmdk) || defined(__ARMCC_VERSION)
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__asm unsigned long
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CPUprimask(void)
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{
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//
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// Read PRIMASK and disable interrupts.
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//
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mrs r0, PRIMASK;
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bx lr
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}
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#endif
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#if defined(ccs)
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unsigned long
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CPUprimask(void)
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{
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//
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// Read PRIMASK and disable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" bx lr\n");
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//
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// The following keeps the compiler happy, because it wants to see a
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// return value from this function. It will generate code to return
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// a zero. However, the real return is the "bx lr" above, so the
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// return(0) is never executed and the function returns with the value
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// you expect in R0.
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//
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return(0);
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}
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#endif
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//*****************************************************************************
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//
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// Wrapper function for the CPSIE instruction. Returns the state of PRIMASK
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// on entry.
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//
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//*****************************************************************************
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#if defined(codered) || defined(gcc) || defined(sourcerygxx)
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unsigned long __attribute__((naked))
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CPUcpsie(void)
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{
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unsigned long ulRet;
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//
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// Read PRIMASK and enable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" cpsie i\n"
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" bx lr\n"
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: "=r" (ulRet));
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//
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// The return is handled in the inline assembly, but the compiler will
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// still complain if there is not an explicit return here (despite the fact
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// that this does not result in any code being produced because of the
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// naked attribute).
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//
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return(ulRet);
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}
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#endif
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#if defined(ewarm)
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unsigned long
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CPUcpsie(void)
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{
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//
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// Read PRIMASK and enable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" cpsie i\n");
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//
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// "Warning[Pe940]: missing return statement at end of non-void function"
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// is suppressed here to avoid putting a "bx lr" in the inline assembly
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// above and a superfluous return statement here.
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//
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#pragma diag_suppress=Pe940
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}
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#pragma diag_default=Pe940
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#endif
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#if defined(rvmdk) || defined(__ARMCC_VERSION)
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__asm unsigned long
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CPUcpsie(void)
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{
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//
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// Read PRIMASK and enable interrupts.
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//
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mrs r0, PRIMASK;
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cpsie i;
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bx lr
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}
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#endif
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#if defined(ccs)
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unsigned long
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CPUcpsie(void)
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{
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//
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// Read PRIMASK and enable interrupts.
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//
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__asm(" mrs r0, PRIMASK\n"
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" cpsie i\n"
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" bx lr\n");
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//
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// The following keeps the compiler happy, because it wants to see a
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// return value from this function. It will generate code to return
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// a zero. However, the real return is the "bx lr" above, so the
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// return(0) is never executed and the function returns with the value
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// you expect in R0.
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//
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return(0);
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}
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#endif
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//*****************************************************************************
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//
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// Wrapper function for the WFI instruction.
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//
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//*****************************************************************************
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#if defined(codered) || defined(gcc) || defined(sourcerygxx)
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void __attribute__((naked))
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CPUwfi(void)
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{
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//
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// Wait for the next interrupt.
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//
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__asm(" wfi\n"
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" bx lr\n");
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}
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#endif
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#if defined(ewarm)
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void
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CPUwfi(void)
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{
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//
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// Wait for the next interrupt.
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//
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__asm(" wfi\n");
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}
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#endif
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#if defined(rvmdk) || defined(__ARMCC_VERSION)
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__asm void
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CPUwfi(void)
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{
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//
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// Wait for the next interrupt.
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//
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wfi;
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bx lr
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}
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#endif
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#if defined(ccs)
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void
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CPUwfi(void)
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{
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//
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// Wait for the next interrupt.
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//
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__asm(" wfi\n");
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}
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#endif
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//*****************************************************************************
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//
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// Wrapper function for writing the BASEPRI register.
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//
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//*****************************************************************************
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#if defined(codered) || defined(gcc) || defined(sourcerygxx)
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void __attribute__((naked))
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CPUbasepriSet(unsigned long ulNewBasepri)
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{
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//
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// Set the BASEPRI register
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//
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__asm(" msr BASEPRI, r0\n"
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" bx lr\n");
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}
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#endif
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#if defined(ewarm)
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void
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CPUbasepriSet(unsigned long ulNewBasepri)
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{
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//
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// Set the BASEPRI register
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//
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__asm(" msr BASEPRI, r0\n");
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}
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#endif
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#if defined(rvmdk) || defined(__ARMCC_VERSION)
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__asm void
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CPUbasepriSet(unsigned long ulNewBasepri)
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{
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//
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// Set the BASEPRI register
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//
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msr BASEPRI, r0;
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bx lr
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}
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#endif
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#if defined(ccs)
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void
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CPUbasepriSet(unsigned long ulNewBasepri)
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{
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//
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// Set the BASEPRI register
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//
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__asm(" msr BASEPRI, r0\n"
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" bx lr\n");
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}
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#endif
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//*****************************************************************************
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//
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// Wrapper function for reading the BASEPRI register.
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//
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//*****************************************************************************
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#if defined(codered) || defined(gcc) || defined(sourcerygxx)
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unsigned long __attribute__((naked))
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CPUbasepriGet(void)
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{
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unsigned long ulRet;
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//
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// Read BASEPRI
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//
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__asm(" mrs r0, BASEPRI\n"
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" bx lr\n"
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: "=r" (ulRet));
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//
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// The return is handled in the inline assembly, but the compiler will
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// still complain if there is not an explicit return here (despite the fact
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// that this does not result in any code being produced because of the
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// naked attribute).
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//
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return(ulRet);
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}
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#endif
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#if defined(ewarm)
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unsigned long
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CPUbasepriGet(void)
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{
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//
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// Read BASEPRI
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//
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__asm(" mrs r0, BASEPRI\n");
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//
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// "Warning[Pe940]: missing return statement at end of non-void function"
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// is suppressed here to avoid putting a "bx lr" in the inline assembly
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// above and a superfluous return statement here.
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//
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#pragma diag_suppress=Pe940
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}
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#pragma diag_default=Pe940
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#endif
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#if defined(rvmdk) || defined(__ARMCC_VERSION)
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__asm unsigned long
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CPUbasepriGet(void)
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{
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//
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// Read BASEPRI
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//
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mrs r0, BASEPRI;
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bx lr
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}
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#endif
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#if defined(ccs)
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unsigned long
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CPUbasepriGet(void)
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{
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//
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// Read BASEPRI
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//
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__asm(" mrs r0, BASEPRI\n"
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" bx lr\n");
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//
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// The following keeps the compiler happy, because it wants to see a
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// return value from this function. It will generate code to return
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// a zero. However, the real return is the "bx lr" above, so the
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// return(0) is never executed and the function returns with the value
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// you expect in R0.
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//
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return(0);
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}
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#endif
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