190 lines
5.3 KiB
C
190 lines
5.3 KiB
C
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//*****************************************************************************
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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) 2006-2009 Luminary Micro, Inc. All rights reserved.
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// Software License Agreement
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//
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// Luminary Micro, Inc. (LMI) is supplying this software for use solely and
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// exclusively on LMI's microcontroller products.
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//
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// The software is owned by LMI and/or its suppliers, and is protected under
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// applicable copyright laws. All rights are reserved. You may not combine
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// this software with "viral" open-source software in order to form a larger
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// program. Any use in violation of the foregoing restrictions may subject
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// the user to criminal sanctions under applicable laws, as well as to civil
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// liability for the breach of the terms and conditions of this license.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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// LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
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// CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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//
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// This is part of revision 4694 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 %0, 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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//*****************************************************************************
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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 %0, 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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//*****************************************************************************
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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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