191 lines
5.4 KiB
C
191 lines
5.4 KiB
C
/****************************************************************************
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* arch/ceva/include/syscall.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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/* This file should never be included directed but, rather, only indirectly
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* through include/syscall.h or include/sys/sycall.h
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*/
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#ifndef __ARCH_CEVA_INCLUDE_SYSCALL_H
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#define __ARCH_CEVA_INCLUDE_SYSCALL_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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#ifndef __ASSEMBLY__
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# include <stdint.h>
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#endif
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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.
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* So a minimum of four syscall values must be reserved.
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* If CONFIG_BUILD_FLAT isn't defined, then four more syscall values
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* must be reserved.
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*/
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#ifndef CONFIG_BUILD_FLAT
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# define CONFIG_SYS_RESERVED 8
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#else
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# define CONFIG_SYS_RESERVED 4
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#endif
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/* CEVA system calls ********************************************************/
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/* SYS call 0:
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*
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* int up_saveusercontext(void *saveregs);
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*/
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#define SYS_save_context 0x00
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/* SYS call 1:
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*
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* void ceva_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
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*/
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#define SYS_restore_context 0x01
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/* SYS call 2:
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*
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* void ceva_switchcontext(uint32_t **saveregs, uint32_t *restoreregs);
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*/
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#define SYS_switch_context 0x02
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#ifdef CONFIG_LIB_SYSCALL
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/* SYS call 3:
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*
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* void up_syscall_return(void);
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*/
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#define SYS_syscall_return 0x03
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#endif /* CONFIG_LIB_SYSCALL */
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#ifndef CONFIG_BUILD_FLAT
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/* SYS call 4:
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*
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* void up_task_start(main_t taskentry, int argc, char *argv[])
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* noreturn_function;
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*/
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#define SYS_task_start 0x04
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/* SYS call 5:
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*
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* void up_pthread_start(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 0x05
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/* SYS call 6:
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*
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* void signal_handler(_sa_sigaction_t sighand, int signo,
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* siginfo_t *info, void *ucontext);
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*/
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#define SYS_signal_handler 0x06
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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 0x07
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#endif /* !CONFIG_BUILD_FLAT */
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* TRAP call with SYS_ call number and no parameters */
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uintptr_t sys_call0(unsigned int nbr);
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/* TRAP call with SYS_ call number and one parameter */
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uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1);
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/* TRAP call with SYS_ call number and two parameters */
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uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2);
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/* TRAP call with SYS_ call number and three parameters */
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uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3);
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/* TRAP call with SYS_ call number and four parameters */
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uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3,
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uintptr_t parm4);
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/* TRAP call with SYS_ call number and five parameters */
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uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3,
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uintptr_t parm4, uintptr_t parm5);
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/* TRAP call with SYS_ call number and six parameters */
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uintptr_t sys_call6(unsigned int nbr, uintptr_t parm1,
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uintptr_t parm2, uintptr_t parm3,
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uintptr_t parm4, uintptr_t parm5,
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uintptr_t parm6);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif /* __ARCH_CEVA_INCLUDE_SYSCALL_H */
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