bb9b58bdde
Signed-off-by: Huang Qi <huangqi3@xiaomi.com> Change-Id: I5c447d94077debc79158686935f288e4c8e51e01
136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/****************************************************************************
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* arch/arm/src/armv8-m/svcall.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_ARMV8_M_SVCALL_H
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#define __ARCH_ARM_SRC_ARMV8_M_SVCALL_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <syscall.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* This logic uses three system calls {0,1,2} for context switching and one
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* for the syscall return. So a minimum of four syscall values must be
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*reserved. If CONFIG_BUILD_PROTECTED is defined, then four more syscall
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* values must be reserved.
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*/
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#ifdef CONFIG_LIB_SYSCALL
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# ifdef CONFIG_BUILD_PROTECTED
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# ifndef CONFIG_SYS_RESERVED
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# error "CONFIG_SYS_RESERVED must be defined to have the value 8"
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# elif CONFIG_SYS_RESERVED != 8
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# error "CONFIG_SYS_RESERVED must have the value 8"
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# endif
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# else
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# ifndef CONFIG_SYS_RESERVED
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# error "CONFIG_SYS_RESERVED must be defined to have the value 4"
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# elif CONFIG_SYS_RESERVED != 4
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# error "CONFIG_SYS_RESERVED must have the value 4"
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# endif
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# endif
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#endif
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/* Cortex-M system calls ****************************************************/
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/* SYS call 0:
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*
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* int arm_saveusercontext(uint32_t *saveregs);
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*/
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#define SYS_save_context (0)
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/* SYS call 1:
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*
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* void arm_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
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*/
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#define SYS_restore_context (1)
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/* SYS call 2:
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*
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* void arm_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
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*/
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#define SYS_switch_context (2)
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#ifdef CONFIG_LIB_SYSCALL
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/* SYS call 3:
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*
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* void arm_syscall_return(void);
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*/
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#define SYS_syscall_return (3)
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#ifndef CONFIG_BUILD_FLAT
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#ifdef CONFIG_BUILD_PROTECTED
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/* SYS call 4:
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*
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* void up_task_start(main_t taskentry, int argc, FAR char *argv[])
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* noreturn_function;
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*/
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#define SYS_task_start (4)
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/* SYS call 6:
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*
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* void signal_handler(_sa_sigaction_t sighand,
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* int signo, FAR siginfo_t *info,
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* FAR void *ucontext);
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*/
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#define SYS_signal_handler (6)
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/* SYS call 7:
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*
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* void signal_handler_return(void);
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*/
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#define SYS_signal_handler_return (7)
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#endif /* CONFIG_BUILD_PROTECTED */
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/* SYS call 5:
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*
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* void up_pthread_start(pthread_startroutine_t startup,
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* pthread_startroutine_t entrypt, pthread_addr_t arg)
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* noreturn_function
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*/
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#define SYS_pthread_start (5)
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#endif /* !CONFIG_BUILD_FLAT */
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#endif /* CONFIG_LIB_SYSCALL */
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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#endif /* __ARCH_ARM_SRC_ARMV8_M_SVCALL_H */
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