qinwei2004 commented on code in PR #6478: URL: https://github.com/apache/incubator-nuttx/pull/6478#discussion_r902414083
########## 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) + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* SVC with SYS_ call number and no parameters */ + +static inline uintptr_t sys_call0(unsigned int nbr) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and one parameter */ + +static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and two parameters */ + +static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and three parameters */ + +static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), "r"(reg3) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and four parameters */ + +static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg4 __asm__("x4") = (uint64_t)(parm4); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), + "r"(reg3), "r"(reg4) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and five parameters */ + +static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4, uintptr_t parm5) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg5 __asm__("x5") = (uint64_t)(parm5); + register uint64_t reg4 __asm__("x4") = (uint64_t)(parm4); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), + "r"(reg3), "r"(reg4), "r"(reg5) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and six parameters */ + +static inline uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4, uintptr_t parm5, + uintptr_t parm6) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg6 __asm__("x6") = (uint64_t)(parm6); + register uint64_t reg5 __asm__("x5") = (uint64_t)(parm5); + register uint64_t reg4 __asm__("x4") = (uint64_t)(parm4); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), + "r"(reg3), "r"(reg4), "r"(reg5), "r"(reg6) + : "memory", "x30" + ); + + return reg0; +} + +/* semihosting(SMH) call with call number and one parameter */ + +static inline long smh_call(unsigned int nbr, uintptr_t *parm) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm); + + __asm__ __volatile__ + ( + "hlt %1" + : "=r"(reg0) + : "i"(SYS_smhcall), "r"(reg0), "r"(reg1) + : "memory", "x30" + ); + + return reg0; +} + +/* Result from SMC/HVC call + * a0-a7 result values from registers 0 to 7 + */ + +struct arm64_smccc_res +{ + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; + unsigned long a4; + unsigned long a5; + unsigned long a6; + unsigned long a7; +}; + +typedef struct arm64_smccc_res arm64_smccc_res_t; + +enum arm64_smccc_conduit +{ + SMCCC_CONDUIT_NONE, + SMCCC_CONDUIT_SMC, + SMCCC_CONDUIT_HVC, +}; + +/* Make HVC calls + * + * param a0 function identifier + * param a1-a7 parameters registers + * param res results + */ + +void arm64_smccc_hvc(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5, + unsigned long a6, unsigned long a7, + struct arm64_smccc_res *res); Review Comment: fix at [48faa78](https://github.com/apache/incubator-nuttx/pull/6478/commits/48faa78d9898c978116903e3d2860b1f2593196a) please check ########## 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) + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* SVC with SYS_ call number and no parameters */ + +static inline uintptr_t sys_call0(unsigned int nbr) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and one parameter */ + +static inline uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and two parameters */ + +static inline uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and three parameters */ + +static inline uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), "r"(reg3) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and four parameters */ + +static inline uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg4 __asm__("x4") = (uint64_t)(parm4); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), + "r"(reg3), "r"(reg4) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and five parameters */ + +static inline uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4, uintptr_t parm5) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg5 __asm__("x5") = (uint64_t)(parm5); + register uint64_t reg4 __asm__("x4") = (uint64_t)(parm4); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), + "r"(reg3), "r"(reg4), "r"(reg5) + : "memory", "x30" + ); + + return reg0; +} + +/* SVC with SYS_ call number and six parameters */ + +static inline uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1, + uintptr_t parm2, uintptr_t parm3, + uintptr_t parm4, uintptr_t parm5, + uintptr_t parm6) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg6 __asm__("x6") = (uint64_t)(parm6); + register uint64_t reg5 __asm__("x5") = (uint64_t)(parm5); + register uint64_t reg4 __asm__("x4") = (uint64_t)(parm4); + register uint64_t reg3 __asm__("x3") = (uint64_t)(parm3); + register uint64_t reg2 __asm__("x2") = (uint64_t)(parm2); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm1); + + __asm__ __volatile__ + ( + "svc %1" + : "=r"(reg0) + : "i"(SYS_syscall), "r"(reg0), "r"(reg1), "r"(reg2), + "r"(reg3), "r"(reg4), "r"(reg5), "r"(reg6) + : "memory", "x30" + ); + + return reg0; +} + +/* semihosting(SMH) call with call number and one parameter */ + +static inline long smh_call(unsigned int nbr, uintptr_t *parm) +{ + register uint64_t reg0 __asm__("x0") = (uint64_t)(nbr); + register uint64_t reg1 __asm__("x1") = (uint64_t)(parm); + + __asm__ __volatile__ + ( + "hlt %1" + : "=r"(reg0) + : "i"(SYS_smhcall), "r"(reg0), "r"(reg1) + : "memory", "x30" + ); + + return reg0; +} + +/* Result from SMC/HVC call + * a0-a7 result values from registers 0 to 7 + */ + +struct arm64_smccc_res +{ + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; + unsigned long a4; + unsigned long a5; + unsigned long a6; + unsigned long a7; +}; + +typedef struct arm64_smccc_res arm64_smccc_res_t; + +enum arm64_smccc_conduit +{ + SMCCC_CONDUIT_NONE, + SMCCC_CONDUIT_SMC, + SMCCC_CONDUIT_HVC, +}; + +/* Make HVC calls + * + * param a0 function identifier + * param a1-a7 parameters registers + * param res results + */ + +void arm64_smccc_hvc(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5, + unsigned long a6, unsigned long a7, + struct arm64_smccc_res *res); + +/* Make SMC calls + * + * param a0 function identifier + * param a1-a7 parameters registers + * param res results + */ + +void arm64_smccc_smc(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5, + unsigned long a6, unsigned long a7, + struct arm64_smccc_res *res); Review Comment: fix at [48faa78](https://github.com/apache/incubator-nuttx/pull/6478/commits/48faa78d9898c978116903e3d2860b1f2593196a) please check -- This is an automated message from the Apache Git Service. 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