qinwei2004 commented on code in PR #6478: URL: https://github.com/apache/incubator-nuttx/pull/6478#discussion_r915952512
########## arch/arm64/include/syscall.h: ########## @@ -0,0 +1,390 @@ +/**************************************************************************** + * arch/arm64/include/syscall.h + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you 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 + * + * http://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. + * + ****************************************************************************/ + +/* This file should never be included directly but, rather, only indirectly + * through include/syscall.h or include/sys/sycall.h + */ + +#ifndef __ARCH_ARM64_INCLUDE_SYSCALL_H +#define __ARCH_ARM64_INCLUDE_SYSCALL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#ifndef __ASSEMBLY__ +# include <stdint.h> +#endif + +/**************************************************************************** + * Pre-processor Prototypes + ****************************************************************************/ + +#define SYS_syscall 0x00 +#define SYS_smhcall 0x123456 + +/* Configuration ************************************************************/ + +/* This logic uses three system calls {0,1,2} for context switching and one + * for the syscall return. + * So a minimum of four syscall values must be reserved. + * If CONFIG_BUILD_PROTECTED is defined, then four more syscall values must + * be reserved. + */ + +#ifndef CONFIG_BUILD_FLAT +# define CONFIG_SYS_RESERVED 8 +#else +# define CONFIG_SYS_RESERVED 4 +#endif + +/* system calls */ + +/* SYS call 0: + * + * int arm64_saveusercontext(void *saveregs); + */ + +#define SYS_save_context (0) + +/* SYS call 1: + * + * void arm64_fullcontextrestore(void *restoreregs) noreturn_function; + */ + +#define SYS_restore_context (1) + +/* SYS call 2: + * + * void arm64_switchcontext(void *saveregs, void *restoreregs); + */ + +#define SYS_switch_context (2) + +#ifdef CONFIG_LIB_SYSCALL +/* SYS call 3: + * + * void arm_syscall_return(void); + */ + +#define SYS_syscall_return (3) +#endif /* CONFIG_LIB_SYSCALL */ + +#ifndef CONFIG_BUILD_FLAT +/* SYS call 4: + * + * void up_task_start(main_t taskentry, int argc, char *argv[]) + * noreturn_function; + */ + +#define SYS_task_start (4) + +/* SYS call 5: + * + * void up_pthread_start((pthread_startroutine_t startup, + * pthread_startroutine_t entrypt, pthread_addr_t arg) + * noreturn_function + */ + +#define SYS_pthread_start (5) + +/* SYS call 6: + * + * void signal_handler(_sa_sigaction_t sighand, + * int signo, siginfo_t *info, + * void *ucontext); + */ + +#define SYS_signal_handler (6) + +/* SYS call 7: + * + * void signal_handler_return(void); + */ + +#define SYS_signal_handler_return (7) +#endif /* !CONFIG_BUILD_FLAT */ + +#define ARM_SMCC_RES_A0 (0) +#define ARM_SMCC_RES_A1 (1) +#define ARM_SMCC_RES_A2 (2) +#define ARM_SMCC_RES_A3 (3) +#define ARM_SMCC_RES_A4 (4) +#define ARM_SMCC_RES_A5 (5) +#define ARM_SMCC_RES_A6 (6) +#define ARM_SMCC_RES_A7 (7) Review Comment: these macros is used at arch/arm64/src/common/arm64_smccc.S -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
