163 lines
6.0 KiB
C
163 lines
6.0 KiB
C
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//*****************************************************************************
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//
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//! @file am_reg_macros_asm.h
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//!
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//! @brief Inline assembly macros. Initially for critical section handling in
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//! protecting hardware registers.
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2017, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 1.2.9 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#ifndef AM_REG_MACROS_ASM_H
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#define AM_REG_MACROS_ASM_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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//*****************************************************************************
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//
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// Critical section assembly macros
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//
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// These macros implement critical section protection using inline assembly
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// for various compilers. They are intended to be used in other register
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// macros or directly in sections of code.
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//
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// Important usage note: These macros create a local scope and therefore MUST
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// be used in pairs.
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//
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//*****************************************************************************
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#if defined(__GNUC_STDC_INLINE__)
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//
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// GCC macros.
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//
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#define AM_CRITICAL_BEGIN_ASM \
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if ( 1 ) \
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{ \
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volatile uint32_t ui32Primask_04172010; \
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__asm(" mrs %0, PRIMASK" : "=r"(ui32Primask_04172010)); \
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__asm(" cpsid i");
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#define AM_CRITICAL_END_ASM \
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__asm(" msr PRIMASK, %0" : : "r"(ui32Primask_04172010)); \
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}
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#elif defined(__ARMCC_VERSION)
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//
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// ARM/Keil macros.
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//
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#define AM_CRITICAL_BEGIN_ASM \
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if ( 1 ) \
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{ \
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volatile uint32_t ui32Primask_04172010; \
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__asm \
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{ \
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mrs ui32Primask_04172010, PRIMASK; \
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cpsid i; \
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}
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#define AM_CRITICAL_END_ASM \
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__asm \
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{ \
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msr PRIMASK, ui32Primask_04172010; \
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} \
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}
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#elif defined(__IAR_SYSTEMS_ICC__)
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//
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// IAR macros.
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//
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#define AM_CRITICAL_BEGIN_ASM \
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if ( 1 ) \
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{ \
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volatile uint32_t ui32Primask_04172010; \
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__asm(" mrs %0, PRIMASK" : "=r"(ui32Primask_04172010)); \
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__asm(" cpsid i");
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#define AM_CRITICAL_END_ASM \
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__asm(" msr PRIMASK, %0" : : "r"(ui32Primask_04172010)); \
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}
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#endif
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//*****************************************************************************
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//
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// A collection of some common inline assembly instructions / intrinsics.
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//
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//*****************************************************************************
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//
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// AM_ASM_BKPT(n)
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//
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#if defined(__ARMCC_VERSION)
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#define AM_ASM_BKPT(n) __breakpoint(n)
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#elif defined(__IAR_SYSTEMS_ICC__)
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#define AM_ASM_BKPT(n) asm(" bkpt "#n);
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#else
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#define AM_ASM_BKPT(n) __asm(" bkpt "#n);
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#endif
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//
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// AM_ASM_WFI
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//
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#if defined(__ARMCC_VERSION)
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#define AM_ASM_WFI __wfi();
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#elif defined(__IAR_SYSTEMS_ICC__)
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#define AM_ASM_WFI asm(" wfi");
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#else
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#define AM_ASM_WFI __asm(" wfi");
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#endif
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//
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// AM_ASM_NOP
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//
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#if defined(__ARMCC_VERSION)
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#define AM_ASM_NOP __nop();
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#elif defined(__IAR_SYSTEMS_ICC__)
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#define AM_ASM_NOP asm(" nop");
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#else
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#define AM_ASM_NOP __asm(" nop");
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif // AM_REG_MACROS_ASM_H
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