619 lines
16 KiB
C
619 lines
16 KiB
C
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/**************************************************************************//**
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* @file core_cmInstr.h
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* @brief CMSIS Cortex-M Core Instruction Access Header File
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* @version V3.01
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* @date 06. March 2012
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*
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* @note
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* Copyright (C) 2009-2012 ARM Limited. All rights reserved.
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*
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* @par
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* ARM Limited (ARM) is supplying this software for use with Cortex-M
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* processor based microcontrollers. This file can be freely distributed
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* within development tools that are supporting such ARM based processors.
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*
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* @par
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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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* ARM 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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******************************************************************************/
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#ifndef __CORE_CMINSTR_H
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#define __CORE_CMINSTR_H
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/* ########################## Core Instruction Access ######################### */
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/** \defgroup CMSIS_Core_InstructionInterface CMSIS Core Instruction Interface
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Access to dedicated instructions
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@{
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*/
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#if defined ( __CC_ARM ) /*------------------RealView Compiler -----------------*/
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/* ARM armcc specific functions */
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#if (__ARMCC_VERSION < 400677)
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#error "Please use ARM Compiler Toolchain V4.0.677 or later!"
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#endif
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/** \brief No Operation
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No Operation does nothing. This instruction can be used for code alignment purposes.
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*/
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#define __NOP __nop
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/** \brief Wait For Interrupt
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Wait For Interrupt is a hint instruction that suspends execution
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until one of a number of events occurs.
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*/
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#define __WFI __wfi
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/** \brief Wait For Event
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Wait For Event is a hint instruction that permits the processor to enter
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a low-power state until one of a number of events occurs.
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*/
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#define __WFE __wfe
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/** \brief Send Event
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Send Event is a hint instruction. It causes an event to be signaled to the CPU.
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*/
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#define __SEV __sev
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/** \brief Instruction Synchronization Barrier
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Instruction Synchronization Barrier flushes the pipeline in the processor,
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so that all instructions following the ISB are fetched from cache or
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memory, after the instruction has been completed.
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*/
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#define __ISB() __isb(0xF)
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/** \brief Data Synchronization Barrier
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This function acts as a special kind of Data Memory Barrier.
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It completes when all explicit memory accesses before this instruction complete.
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*/
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#define __DSB() __dsb(0xF)
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/** \brief Data Memory Barrier
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This function ensures the apparent order of the explicit memory operations before
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and after the instruction, without ensuring their completion.
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*/
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#define __DMB() __dmb(0xF)
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/** \brief Reverse byte order (32 bit)
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This function reverses the byte order in integer value.
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\param [in] value Value to reverse
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\return Reversed value
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*/
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#define __REV __rev
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/** \brief Reverse byte order (16 bit)
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This function reverses the byte order in two unsigned short values.
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\param [in] value Value to reverse
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\return Reversed value
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*/
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__attribute__((section(".rev16_text"))) __STATIC_INLINE __ASM uint32_t __REV16(uint32_t value)
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{
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rev16 r0, r0
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bx lr
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}
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/** \brief Reverse byte order in signed short value
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This function reverses the byte order in a signed short value with sign extension to integer.
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\param [in] value Value to reverse
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\return Reversed value
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*/
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__attribute__((section(".revsh_text"))) __STATIC_INLINE __ASM int32_t __REVSH(int32_t value)
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{
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revsh r0, r0
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bx lr
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}
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/** \brief Rotate Right in unsigned value (32 bit)
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This function Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.
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\param [in] value Value to rotate
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\param [in] value Number of Bits to rotate
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\return Rotated value
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*/
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#define __ROR __ror
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#if (__CORTEX_M >= 0x03)
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/** \brief Reverse bit order of value
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This function reverses the bit order of the given value.
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\param [in] value Value to reverse
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\return Reversed value
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*/
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#define __RBIT __rbit
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/** \brief LDR Exclusive (8 bit)
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This function performs a exclusive LDR command for 8 bit value.
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\param [in] ptr Pointer to data
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\return value of type uint8_t at (*ptr)
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*/
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#define __LDREXB(ptr) ((uint8_t ) __ldrex(ptr))
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/** \brief LDR Exclusive (16 bit)
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This function performs a exclusive LDR command for 16 bit values.
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\param [in] ptr Pointer to data
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\return value of type uint16_t at (*ptr)
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*/
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#define __LDREXH(ptr) ((uint16_t) __ldrex(ptr))
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/** \brief LDR Exclusive (32 bit)
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This function performs a exclusive LDR command for 32 bit values.
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\param [in] ptr Pointer to data
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\return value of type uint32_t at (*ptr)
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*/
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#define __LDREXW(ptr) ((uint32_t ) __ldrex(ptr))
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/** \brief STR Exclusive (8 bit)
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This function performs a exclusive STR command for 8 bit values.
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\param [in] value Value to store
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\param [in] ptr Pointer to location
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\return 0 Function succeeded
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\return 1 Function failed
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*/
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#define __STREXB(value, ptr) __strex(value, ptr)
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/** \brief STR Exclusive (16 bit)
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This function performs a exclusive STR command for 16 bit values.
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\param [in] value Value to store
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\param [in] ptr Pointer to location
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\return 0 Function succeeded
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\return 1 Function failed
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*/
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#define __STREXH(value, ptr) __strex(value, ptr)
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/** \brief STR Exclusive (32 bit)
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This function performs a exclusive STR command for 32 bit values.
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\param [in] value Value to store
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\param [in] ptr Pointer to location
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\return 0 Function succeeded
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\return 1 Function failed
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*/
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#define __STREXW(value, ptr) __strex(value, ptr)
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/** \brief Remove the exclusive lock
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This function removes the exclusive lock which is created by LDREX.
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*/
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#define __CLREX __clrex
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/** \brief Signed Saturate
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This function saturates a signed value.
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\param [in] value Value to be saturated
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\param [in] sat Bit position to saturate to (1..32)
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\return Saturated value
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*/
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#define __SSAT __ssat
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/** \brief Unsigned Saturate
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This function saturates an unsigned value.
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\param [in] value Value to be saturated
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\param [in] sat Bit position to saturate to (0..31)
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\return Saturated value
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*/
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#define __USAT __usat
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/** \brief Count leading zeros
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This function counts the number of leading zeros of a data value.
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\param [in] value Value to count the leading zeros
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\return number of leading zeros in value
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*/
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#define __CLZ __clz
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#endif /* (__CORTEX_M >= 0x03) */
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#elif defined ( __ICCARM__ ) /*------------------ ICC Compiler -------------------*/
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/* IAR iccarm specific functions */
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#include <cmsis_iar.h>
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#elif defined ( __TMS470__ ) /*---------------- TI CCS Compiler ------------------*/
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/* TI CCS specific functions */
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#include <cmsis_ccs.h>
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#elif defined ( __GNUC__ ) /*------------------ GNU Compiler ---------------------*/
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/* GNU gcc specific functions */
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/** \brief No Operation
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No Operation does nothing. This instruction can be used for code alignment purposes.
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*/
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__attribute__((always_inline)) __STATIC_INLINE void __NOP(void)
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{
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__ASM volatile("nop");
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}
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/** \brief Wait For Interrupt
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Wait For Interrupt is a hint instruction that suspends execution
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until one of a number of events occurs.
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*/
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__attribute__((always_inline)) __STATIC_INLINE void __WFI(void)
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{
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__ASM volatile("wfi");
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}
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/** \brief Wait For Event
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Wait For Event is a hint instruction that permits the processor to enter
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a low-power state until one of a number of events occurs.
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*/
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__attribute__((always_inline)) __STATIC_INLINE void __WFE(void)
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{
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__ASM volatile("wfe");
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}
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/** \brief Send Event
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Send Event is a hint instruction. It causes an event to be signaled to the CPU.
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*/
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__attribute__((always_inline)) __STATIC_INLINE void __SEV(void)
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{
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__ASM volatile("sev");
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}
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/** \brief Instruction Synchronization Barrier
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Instruction Synchronization Barrier flushes the pipeline in the processor,
|
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so that all instructions following the ISB are fetched from cache or
|
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memory, after the instruction has been completed.
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*/
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__attribute__((always_inline)) __STATIC_INLINE void __ISB(void)
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{
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__ASM volatile("isb");
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}
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/** \brief Data Synchronization Barrier
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||
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This function acts as a special kind of Data Memory Barrier.
|
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It completes when all explicit memory accesses before this instruction complete.
|
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*/
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__attribute__((always_inline)) __STATIC_INLINE void __DSB(void)
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{
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__ASM volatile("dsb");
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}
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/** \brief Data Memory Barrier
|
||
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|
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||
|
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This function ensures the apparent order of the explicit memory operations before
|
||
|
|
and after the instruction, without ensuring their completion.
|
||
|
|
*/
|
||
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__attribute__((always_inline)) __STATIC_INLINE void __DMB(void)
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{
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__ASM volatile("dmb");
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}
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/** \brief Reverse byte order (32 bit)
|
||
|
|
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||
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This function reverses the byte order in integer value.
|
||
|
|
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||
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\param [in] value Value to reverse
|
||
|
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\return Reversed value
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __REV(uint32_t value)
|
||
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{
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uint32_t result;
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||
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||
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__ASM volatile("rev %0, %1" : "=r"(result) : "r"(value));
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return (result);
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}
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||
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||
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||
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|
/** \brief Reverse byte order (16 bit)
|
||
|
|
|
||
|
|
This function reverses the byte order in two unsigned short values.
|
||
|
|
|
||
|
|
\param [in] value Value to reverse
|
||
|
|
\return Reversed value
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __REV16(uint32_t value)
|
||
|
|
{
|
||
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uint32_t result;
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||
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|
||
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__ASM volatile("rev16 %0, %1" : "=r"(result) : "r"(value));
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||
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return (result);
|
||
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}
|
||
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|
|
||
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|
|
||
|
|
/** \brief Reverse byte order in signed short value
|
||
|
|
|
||
|
|
This function reverses the byte order in a signed short value with sign extension to integer.
|
||
|
|
|
||
|
|
\param [in] value Value to reverse
|
||
|
|
\return Reversed value
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE int32_t __REVSH(int32_t value)
|
||
|
|
{
|
||
|
|
uint32_t result;
|
||
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|
|
||
|
|
__ASM volatile("revsh %0, %1" : "=r"(result) : "r"(value));
|
||
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|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief Rotate Right in unsigned value (32 bit)
|
||
|
|
|
||
|
|
This function Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.
|
||
|
|
|
||
|
|
\param [in] value Value to rotate
|
||
|
|
\param [in] value Number of Bits to rotate
|
||
|
|
\return Rotated value
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __ROR(uint32_t op1, uint32_t op2)
|
||
|
|
{
|
||
|
|
|
||
|
|
__ASM volatile("ror %0, %0, %1" : "+r"(op1) : "r"(op2));
|
||
|
|
return (op1);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if (__CORTEX_M >= 0x03)
|
||
|
|
|
||
|
|
/** \brief Reverse bit order of value
|
||
|
|
|
||
|
|
This function reverses the bit order of the given value.
|
||
|
|
|
||
|
|
\param [in] value Value to reverse
|
||
|
|
\return Reversed value
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __RBIT(uint32_t value)
|
||
|
|
{
|
||
|
|
uint32_t result;
|
||
|
|
|
||
|
|
__ASM volatile("rbit %0, %1" : "=r"(result) : "r"(value));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief LDR Exclusive (8 bit)
|
||
|
|
|
||
|
|
This function performs a exclusive LDR command for 8 bit value.
|
||
|
|
|
||
|
|
\param [in] ptr Pointer to data
|
||
|
|
\return value of type uint8_t at (*ptr)
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint8_t __LDREXB(volatile uint8_t *addr)
|
||
|
|
{
|
||
|
|
uint8_t result;
|
||
|
|
|
||
|
|
__ASM volatile("ldrexb %0, [%1]" : "=r"(result) : "r"(addr));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief LDR Exclusive (16 bit)
|
||
|
|
|
||
|
|
This function performs a exclusive LDR command for 16 bit values.
|
||
|
|
|
||
|
|
\param [in] ptr Pointer to data
|
||
|
|
\return value of type uint16_t at (*ptr)
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint16_t __LDREXH(volatile uint16_t *addr)
|
||
|
|
{
|
||
|
|
uint16_t result;
|
||
|
|
|
||
|
|
__ASM volatile("ldrexh %0, [%1]" : "=r"(result) : "r"(addr));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief LDR Exclusive (32 bit)
|
||
|
|
|
||
|
|
This function performs a exclusive LDR command for 32 bit values.
|
||
|
|
|
||
|
|
\param [in] ptr Pointer to data
|
||
|
|
\return value of type uint32_t at (*ptr)
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __LDREXW(volatile uint32_t *addr)
|
||
|
|
{
|
||
|
|
uint32_t result;
|
||
|
|
|
||
|
|
__ASM volatile("ldrex %0, [%1]" : "=r"(result) : "r"(addr));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief STR Exclusive (8 bit)
|
||
|
|
|
||
|
|
This function performs a exclusive STR command for 8 bit values.
|
||
|
|
|
||
|
|
\param [in] value Value to store
|
||
|
|
\param [in] ptr Pointer to location
|
||
|
|
\return 0 Function succeeded
|
||
|
|
\return 1 Function failed
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __STREXB(uint8_t value, volatile uint8_t *addr)
|
||
|
|
{
|
||
|
|
uint32_t result;
|
||
|
|
|
||
|
|
__ASM volatile("strexb %0, %2, [%1]" : "=&r"(result) : "r"(addr), "r"(value));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief STR Exclusive (16 bit)
|
||
|
|
|
||
|
|
This function performs a exclusive STR command for 16 bit values.
|
||
|
|
|
||
|
|
\param [in] value Value to store
|
||
|
|
\param [in] ptr Pointer to location
|
||
|
|
\return 0 Function succeeded
|
||
|
|
\return 1 Function failed
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __STREXH(uint16_t value, volatile uint16_t *addr)
|
||
|
|
{
|
||
|
|
uint32_t result;
|
||
|
|
|
||
|
|
__ASM volatile("strexh %0, %2, [%1]" : "=&r"(result) : "r"(addr), "r"(value));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief STR Exclusive (32 bit)
|
||
|
|
|
||
|
|
This function performs a exclusive STR command for 32 bit values.
|
||
|
|
|
||
|
|
\param [in] value Value to store
|
||
|
|
\param [in] ptr Pointer to location
|
||
|
|
\return 0 Function succeeded
|
||
|
|
\return 1 Function failed
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint32_t __STREXW(uint32_t value, volatile uint32_t *addr)
|
||
|
|
{
|
||
|
|
uint32_t result;
|
||
|
|
|
||
|
|
__ASM volatile("strex %0, %2, [%1]" : "=&r"(result) : "r"(addr), "r"(value));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief Remove the exclusive lock
|
||
|
|
|
||
|
|
This function removes the exclusive lock which is created by LDREX.
|
||
|
|
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE void __CLREX(void)
|
||
|
|
{
|
||
|
|
__ASM volatile("clrex");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief Signed Saturate
|
||
|
|
|
||
|
|
This function saturates a signed value.
|
||
|
|
|
||
|
|
\param [in] value Value to be saturated
|
||
|
|
\param [in] sat Bit position to saturate to (1..32)
|
||
|
|
\return Saturated value
|
||
|
|
*/
|
||
|
|
#define __SSAT(ARG1,ARG2) \
|
||
|
|
({ \
|
||
|
|
uint32_t __RES, __ARG1 = (ARG1); \
|
||
|
|
__ASM ("ssat %0, %1, %2" : "=r" (__RES) : "I" (ARG2), "r" (__ARG1) ); \
|
||
|
|
__RES; \
|
||
|
|
})
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief Unsigned Saturate
|
||
|
|
|
||
|
|
This function saturates an unsigned value.
|
||
|
|
|
||
|
|
\param [in] value Value to be saturated
|
||
|
|
\param [in] sat Bit position to saturate to (0..31)
|
||
|
|
\return Saturated value
|
||
|
|
*/
|
||
|
|
#define __USAT(ARG1,ARG2) \
|
||
|
|
({ \
|
||
|
|
uint32_t __RES, __ARG1 = (ARG1); \
|
||
|
|
__ASM ("usat %0, %1, %2" : "=r" (__RES) : "I" (ARG2), "r" (__ARG1) ); \
|
||
|
|
__RES; \
|
||
|
|
})
|
||
|
|
|
||
|
|
|
||
|
|
/** \brief Count leading zeros
|
||
|
|
|
||
|
|
This function counts the number of leading zeros of a data value.
|
||
|
|
|
||
|
|
\param [in] value Value to count the leading zeros
|
||
|
|
\return number of leading zeros in value
|
||
|
|
*/
|
||
|
|
__attribute__((always_inline)) __STATIC_INLINE uint8_t __CLZ(uint32_t value)
|
||
|
|
{
|
||
|
|
uint8_t result;
|
||
|
|
|
||
|
|
__ASM volatile("clz %0, %1" : "=r"(result) : "r"(value));
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* (__CORTEX_M >= 0x03) */
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#elif defined ( __TASKING__ ) /*------------------ TASKING Compiler --------------*/
|
||
|
|
/* TASKING carm specific functions */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The CMSIS functions have been implemented as intrinsics in the compiler.
|
||
|
|
* Please use "carm -?i" to get an up to date list of all intrinsics,
|
||
|
|
* Including the CMSIS ones.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*@}*/ /* end of group CMSIS_Core_InstructionInterface */
|
||
|
|
|
||
|
|
#endif /* __CORE_CMINSTR_H */
|