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mbed-os/cmsis/TARGET_CORTEX_A/cmsis_armclang.h
- Committer:
- kadonotakashi
- Date:
- 2018-10-10
- Revision:
- 0:8fdf9a60065b
File content as of revision 0:8fdf9a60065b:
/**************************************************************************//** * @file cmsis_armclang.h * @brief CMSIS compiler specific macros, functions, instructions * @version V1.0.2 * @date 10. January 2018 ******************************************************************************/ /* * Copyright (c) 2009-2018 Arm Limited. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the License); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an AS IS BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef __CMSIS_ARMCLANG_H #define __CMSIS_ARMCLANG_H #pragma clang system_header /* treat file as system include file */ #ifndef __ARM_COMPAT_H #include <arm_compat.h> /* Compatibility header for Arm Compiler 5 intrinsics */ #endif /* CMSIS compiler specific defines */ #ifndef __ASM #define __ASM __asm #endif #ifndef __INLINE #define __INLINE __inline #endif #ifndef __FORCEINLINE #define __FORCEINLINE __attribute__((always_inline)) #endif #ifndef __STATIC_INLINE #define __STATIC_INLINE static __inline #endif #ifndef __STATIC_FORCEINLINE #define __STATIC_FORCEINLINE __attribute__((always_inline)) static __inline #endif #ifndef __NO_RETURN #define __NO_RETURN __attribute__((__noreturn__)) #endif #ifndef CMSIS_DEPRECATED #define CMSIS_DEPRECATED __attribute__((deprecated)) #endif #ifndef __USED #define __USED __attribute__((used)) #endif #ifndef __WEAK #define __WEAK __attribute__((weak)) #endif #ifndef __PACKED #define __PACKED __attribute__((packed, aligned(1))) #endif #ifndef __PACKED_STRUCT #define __PACKED_STRUCT struct __attribute__((packed, aligned(1))) #endif #ifndef __UNALIGNED_UINT16_WRITE #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wpacked" /*lint -esym(9058, T_UINT16_WRITE)*/ /* disable MISRA 2012 Rule 2.4 for T_UINT16_WRITE */ __PACKED_STRUCT T_UINT16_WRITE { uint16_t v; }; #pragma clang diagnostic pop #define __UNALIGNED_UINT16_WRITE(addr, val) (void)((((struct T_UINT16_WRITE *)(void *)(addr))->v) = (val)) #endif #ifndef __UNALIGNED_UINT16_READ #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wpacked" /*lint -esym(9058, T_UINT16_READ)*/ /* disable MISRA 2012 Rule 2.4 for T_UINT16_READ */ __PACKED_STRUCT T_UINT16_READ { uint16_t v; }; #pragma clang diagnostic pop #define __UNALIGNED_UINT16_READ(addr) (((const struct T_UINT16_READ *)(const void *)(addr))->v) #endif #ifndef __UNALIGNED_UINT32_WRITE #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wpacked" /*lint -esym(9058, T_UINT32_WRITE)*/ /* disable MISRA 2012 Rule 2.4 for T_UINT32_WRITE */ __PACKED_STRUCT T_UINT32_WRITE { uint32_t v; }; #pragma clang diagnostic pop #define __UNALIGNED_UINT32_WRITE(addr, val) (void)((((struct T_UINT32_WRITE *)(void *)(addr))->v) = (val)) #endif #ifndef __UNALIGNED_UINT32_READ #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wpacked" __PACKED_STRUCT T_UINT32_READ { uint32_t v; }; #pragma clang diagnostic pop #define __UNALIGNED_UINT32_READ(addr) (((const struct T_UINT32_READ *)(const void *)(addr))->v) #endif #ifndef __ALIGNED #define __ALIGNED(x) __attribute__((aligned(x))) #endif #ifndef __PACKED #define __PACKED __attribute__((packed)) #endif /* ########################## Core Instruction Access ######################### */ /** \brief No Operation */ #define __NOP __builtin_arm_nop /** \brief Wait For Interrupt */ #define __WFI __builtin_arm_wfi /** \brief Wait For Event */ #define __WFE __builtin_arm_wfe /** \brief Send Event */ #define __SEV __builtin_arm_sev /** \brief Instruction Synchronization Barrier */ #define __ISB() do {\ __schedule_barrier();\ __builtin_arm_isb(0xF);\ __schedule_barrier();\ } while (0U) /** \brief Data Synchronization Barrier */ #define __DSB() do {\ __schedule_barrier();\ __builtin_arm_dsb(0xF);\ __schedule_barrier();\ } while (0U) /** \brief Data Memory Barrier */ #define __DMB() do {\ __schedule_barrier();\ __builtin_arm_dmb(0xF);\ __schedule_barrier();\ } while (0U) /** \brief Reverse byte order (32 bit) \details Reverses the byte order in unsigned integer value. For example, 0x12345678 becomes 0x78563412. \param [in] value Value to reverse \return Reversed value */ #define __REV(value) __builtin_bswap32(value) /** \brief Reverse byte order (16 bit) \details Reverses the byte order within each halfword of a word. For example, 0x12345678 becomes 0x34127856. \param [in] value Value to reverse \return Reversed value */ #define __REV16(value) __ROR(__REV(value), 16) /** \brief Reverse byte order (16 bit) \details Reverses the byte order in a 16-bit value and returns the signed 16-bit result. For example, 0x0080 becomes 0x8000. \param [in] value Value to reverse \return Reversed value */ #define __REVSH(value) (int16_t)__builtin_bswap16(value) /** \brief Rotate Right in unsigned value (32 bit) \details Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits. \param [in] op1 Value to rotate \param [in] op2 Number of Bits to rotate \return Rotated value */ __STATIC_FORCEINLINE uint32_t __ROR(uint32_t op1, uint32_t op2) { op2 %= 32U; if (op2 == 0U) { return op1; } return (op1 >> op2) | (op1 << (32U - op2)); } /** \brief Breakpoint \param [in] value is ignored by the processor. If required, a debugger can use it to store additional information about the breakpoint. */ #define __BKPT(value) __ASM volatile ("bkpt "#value) /** \brief Reverse bit order of value \param [in] value Value to reverse \return Reversed value */ #define __RBIT __builtin_arm_rbit /** \brief Count leading zeros \param [in] value Value to count the leading zeros \return number of leading zeros in value */ #define __CLZ (uint8_t)__builtin_clz /** \brief LDR Exclusive (8 bit) \details Executes a exclusive LDR instruction for 8 bit value. \param [in] ptr Pointer to data \return value of type uint8_t at (*ptr) */ #define __LDREXB (uint8_t)__builtin_arm_ldrex /** \brief LDR Exclusive (16 bit) \details Executes a exclusive LDR instruction for 16 bit values. \param [in] ptr Pointer to data \return value of type uint16_t at (*ptr) */ #define __LDREXH (uint16_t)__builtin_arm_ldrex /** \brief LDR Exclusive (32 bit) \details Executes a exclusive LDR instruction for 32 bit values. \param [in] ptr Pointer to data \return value of type uint32_t at (*ptr) */ #define __LDREXW (uint32_t)__builtin_arm_ldrex /** \brief STR Exclusive (8 bit) \details Executes a exclusive STR instruction for 8 bit values. \param [in] value Value to store \param [in] ptr Pointer to location \return 0 Function succeeded \return 1 Function failed */ #define __STREXB (uint32_t)__builtin_arm_strex /** \brief STR Exclusive (16 bit) \details Executes a exclusive STR instruction for 16 bit values. \param [in] value Value to store \param [in] ptr Pointer to location \return 0 Function succeeded \return 1 Function failed */ #define __STREXH (uint32_t)__builtin_arm_strex /** \brief STR Exclusive (32 bit) \details Executes a exclusive STR instruction for 32 bit values. \param [in] value Value to store \param [in] ptr Pointer to location \return 0 Function succeeded \return 1 Function failed */ #define __STREXW (uint32_t)__builtin_arm_strex /** \brief Remove the exclusive lock \details Removes the exclusive lock which is created by LDREX. */ #define __CLREX __builtin_arm_clrex /** \brief Signed Saturate \details 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 __builtin_arm_ssat /** \brief Unsigned Saturate \details 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 __builtin_arm_usat /* ########################### Core Function Access ########################### */ /** \brief Get FPSCR \details Returns the current value of the Floating Point Status/Control register. \return Floating Point Status/Control register value */ #define __get_FPSCR __builtin_arm_get_fpscr /** \brief Set FPSCR \details Assigns the given value to the Floating Point Status/Control register. \param [in] fpscr Floating Point Status/Control value to set */ #define __set_FPSCR __builtin_arm_set_fpscr /** \brief Get CPSR Register \return CPSR Register value */ __STATIC_FORCEINLINE uint32_t __get_CPSR(void) { uint32_t result; __ASM volatile("MRS %0, cpsr" : "=r" (result) ); return(result); } /** \brief Set CPSR Register \param [in] cpsr CPSR value to set */ __STATIC_FORCEINLINE void __set_CPSR(uint32_t cpsr) { __ASM volatile ("MSR cpsr, %0" : : "r" (cpsr) : "memory"); } /** \brief Get Mode \return Processor Mode */ __STATIC_FORCEINLINE uint32_t __get_mode(void) { return (__get_CPSR() & 0x1FU); } /** \brief Set Mode \param [in] mode Mode value to set */ __STATIC_FORCEINLINE void __set_mode(uint32_t mode) { __ASM volatile("MSR cpsr_c, %0" : : "r" (mode) : "memory"); } /** \brief Get Stack Pointer \return Stack Pointer value */ __STATIC_FORCEINLINE uint32_t __get_SP() { uint32_t result; __ASM volatile("MOV %0, sp" : "=r" (result) : : "memory"); return result; } /** \brief Set Stack Pointer \param [in] stack Stack Pointer value to set */ __STATIC_FORCEINLINE void __set_SP(uint32_t stack) { __ASM volatile("MOV sp, %0" : : "r" (stack) : "memory"); } /** \brief Get USR/SYS Stack Pointer \return USR/SYS Stack Pointer value */ __STATIC_FORCEINLINE uint32_t __get_SP_usr() { uint32_t cpsr; uint32_t result; __ASM volatile( "MRS %0, cpsr \n" "CPS #0x1F \n" // no effect in USR mode "MOV %1, sp \n" "MSR cpsr_c, %2 \n" // no effect in USR mode "ISB" : "=r"(cpsr), "=r"(result) : "r"(cpsr) : "memory" ); return result; } /** \brief Set USR/SYS Stack Pointer \param [in] topOfProcStack USR/SYS Stack Pointer value to set */ __STATIC_FORCEINLINE void __set_SP_usr(uint32_t topOfProcStack) { uint32_t cpsr; __ASM volatile( "MRS %0, cpsr \n" "CPS #0x1F \n" // no effect in USR mode "MOV sp, %1 \n" "MSR cpsr_c, %2 \n" // no effect in USR mode "ISB" : "=r"(cpsr) : "r" (topOfProcStack), "r"(cpsr) : "memory" ); } /** \brief Get FPEXC \return Floating Point Exception Control register value */ __STATIC_FORCEINLINE uint32_t __get_FPEXC(void) { #if (__FPU_PRESENT == 1) uint32_t result; __ASM volatile("VMRS %0, fpexc" : "=r" (result) : : "memory"); return(result); #else return(0); #endif } /** \brief Set FPEXC \param [in] fpexc Floating Point Exception Control value to set */ __STATIC_FORCEINLINE void __set_FPEXC(uint32_t fpexc) { #if (__FPU_PRESENT == 1) __ASM volatile ("VMSR fpexc, %0" : : "r" (fpexc) : "memory"); #endif } /* * Include common core functions to access Coprocessor 15 registers */ #define __get_CP(cp, op1, Rt, CRn, CRm, op2) __ASM volatile("MRC p" # cp ", " # op1 ", %0, c" # CRn ", c" # CRm ", " # op2 : "=r" (Rt) : : "memory" ) #define __set_CP(cp, op1, Rt, CRn, CRm, op2) __ASM volatile("MCR p" # cp ", " # op1 ", %0, c" # CRn ", c" # CRm ", " # op2 : : "r" (Rt) : "memory" ) #define __get_CP64(cp, op1, Rt, CRm) __ASM volatile("MRRC p" # cp ", " # op1 ", %Q0, %R0, c" # CRm : "=r" (Rt) : : "memory" ) #define __set_CP64(cp, op1, Rt, CRm) __ASM volatile("MCRR p" # cp ", " # op1 ", %Q0, %R0, c" # CRm : : "r" (Rt) : "memory" ) #include "cmsis_cp15.h" /** \brief Enable Floating Point Unit Critical section, called from undef handler, so systick is disabled */ __STATIC_INLINE void __FPU_Enable(void) { __ASM volatile( //Permit access to VFP/NEON, registers by modifying CPACR " MRC p15,0,R1,c1,c0,2 \n" " ORR R1,R1,#0x00F00000 \n" " MCR p15,0,R1,c1,c0,2 \n" //Ensure that subsequent instructions occur in the context of VFP/NEON access permitted " ISB \n" //Enable VFP/NEON " VMRS R1,FPEXC \n" " ORR R1,R1,#0x40000000 \n" " VMSR FPEXC,R1 \n" //Initialise VFP/NEON registers to 0 " MOV R2,#0 \n" //Initialise D16 registers to 0 " VMOV D0, R2,R2 \n" " VMOV D1, R2,R2 \n" " VMOV D2, R2,R2 \n" " VMOV D3, R2,R2 \n" " VMOV D4, R2,R2 \n" " VMOV D5, R2,R2 \n" " VMOV D6, R2,R2 \n" " VMOV D7, R2,R2 \n" " VMOV D8, R2,R2 \n" " VMOV D9, R2,R2 \n" " VMOV D10,R2,R2 \n" " VMOV D11,R2,R2 \n" " VMOV D12,R2,R2 \n" " VMOV D13,R2,R2 \n" " VMOV D14,R2,R2 \n" " VMOV D15,R2,R2 \n" #if __ARM_NEON == 1 //Initialise D32 registers to 0 " VMOV D16,R2,R2 \n" " VMOV D17,R2,R2 \n" " VMOV D18,R2,R2 \n" " VMOV D19,R2,R2 \n" " VMOV D20,R2,R2 \n" " VMOV D21,R2,R2 \n" " VMOV D22,R2,R2 \n" " VMOV D23,R2,R2 \n" " VMOV D24,R2,R2 \n" " VMOV D25,R2,R2 \n" " VMOV D26,R2,R2 \n" " VMOV D27,R2,R2 \n" " VMOV D28,R2,R2 \n" " VMOV D29,R2,R2 \n" " VMOV D30,R2,R2 \n" " VMOV D31,R2,R2 \n" #endif //Initialise FPSCR to a known state " VMRS R2,FPSCR \n" " LDR R3,=0x00086060 \n" //Mask off all bits that do not have to be preserved. Non-preserved bits can/should be zero. " AND R2,R2,R3 \n" " VMSR FPSCR,R2 " ); } #endif /* __CMSIS_ARMCLANG_H */