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- //*****************************************************************************
- //
- //! @file am_reg_macros_asm.h
- //!
- //! @brief Inline assembly macros. Initially for critical section handling in
- //! protecting hardware registers.
- //
- //*****************************************************************************
- //*****************************************************************************
- //
- // Copyright (c) 2017, Ambiq Micro
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions are met:
- //
- // 1. Redistributions of source code must retain the above copyright notice,
- // this list of conditions and the following disclaimer.
- //
- // 2. Redistributions in binary form must reproduce the above copyright
- // notice, this list of conditions and the following disclaimer in the
- // documentation and/or other materials provided with the distribution.
- //
- // 3. Neither the name of the copyright holder nor the names of its
- // contributors may be used to endorse or promote products derived from this
- // software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- // POSSIBILITY OF SUCH DAMAGE.
- //
- // This is part of revision 1.2.11 of the AmbiqSuite Development Package.
- //
- //*****************************************************************************
- #ifndef AM_REG_MACROS_ASM_H
- #define AM_REG_MACROS_ASM_H
- #ifdef __cplusplus
- extern "C"
- {
- #endif
- //*****************************************************************************
- //
- // Critical section assembly macros
- //
- // These macros implement critical section protection using inline assembly
- // for various compilers. They are intended to be used in other register
- // macros or directly in sections of code.
- //
- // Important usage note: These macros create a local scope and therefore MUST
- // be used in pairs.
- //
- //*****************************************************************************
- #if defined(__GNUC_STDC_INLINE__)
- //
- // GCC macros.
- //
- #define AM_CRITICAL_BEGIN_ASM \
- if ( 1 ) \
- { \
- volatile uint32_t ui32Primask_04172010; \
- __asm(" mrs %0, PRIMASK" : "=r"(ui32Primask_04172010)); \
- __asm(" cpsid i");
- #define AM_CRITICAL_END_ASM \
- __asm(" msr PRIMASK, %0" : : "r"(ui32Primask_04172010)); \
- }
- #elif defined(__ARMCC_VERSION)
- //
- // ARM/Keil macros.
- //
- #define AM_CRITICAL_BEGIN_ASM \
- if ( 1 ) \
- { \
- volatile uint32_t ui32Primask_04172010; \
- __asm \
- { \
- mrs ui32Primask_04172010, PRIMASK; \
- cpsid i; \
- }
- #define AM_CRITICAL_END_ASM \
- __asm \
- { \
- msr PRIMASK, ui32Primask_04172010; \
- } \
- }
- #elif defined(__IAR_SYSTEMS_ICC__)
- //
- // IAR macros.
- //
- #define AM_CRITICAL_BEGIN_ASM \
- if ( 1 ) \
- { \
- volatile uint32_t ui32Primask_04172010; \
- __asm(" mrs %0, PRIMASK" : "=r"(ui32Primask_04172010)); \
- __asm(" cpsid i");
- #define AM_CRITICAL_END_ASM \
- __asm(" msr PRIMASK, %0" : : "r"(ui32Primask_04172010)); \
- }
- #endif
- //*****************************************************************************
- //
- // A collection of some common inline assembly instructions / intrinsics.
- //
- //*****************************************************************************
- //
- // AM_ASM_BKPT(n)
- //
- #if defined(__ARMCC_VERSION)
- #define AM_ASM_BKPT(n) __breakpoint(n)
- #elif defined(__IAR_SYSTEMS_ICC__)
- #define AM_ASM_BKPT(n) asm(" bkpt "#n);
- #else
- #define AM_ASM_BKPT(n) __asm(" bkpt "#n);
- #endif
- //
- // AM_ASM_WFI
- //
- #if defined(__ARMCC_VERSION)
- #define AM_ASM_WFI __wfi();
- #elif defined(__IAR_SYSTEMS_ICC__)
- #define AM_ASM_WFI asm(" wfi");
- #else
- #define AM_ASM_WFI __asm(" wfi");
- #endif
- //
- // AM_ASM_NOP
- //
- #if defined(__ARMCC_VERSION)
- #define AM_ASM_NOP __nop();
- #elif defined(__IAR_SYSTEMS_ICC__)
- #define AM_ASM_NOP asm(" nop");
- #else
- #define AM_ASM_NOP __asm(" nop");
- #endif
- #ifdef __cplusplus
- }
- #endif
- #endif // AM_REG_MACROS_ASM_H
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