| //***************************************************************************** |
| // |
| //! @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 v1.2.10-2-gea660ad-hotfix2 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 |
| |
