7b00c8bdb8
Reason: xtensa svcall only have level-1 interrupt level. Sush do not generate interrupt when up_irq_save. Software int can generate interrupt when up_irq_save. Signed-off-by: zhuyanlin <zhuyanlin1@xiaomi.com>
166 lines
4.4 KiB
C
166 lines
4.4 KiB
C
/****************************************************************************
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* arch/xtensa/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 directly 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_XTENSA_INCLUDE_SYSCALL_H
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#define __ARCH_XTENSA_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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#include <arch/irq.h>
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#ifndef __ASSEMBLY__
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# include <debug.h>
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# include <stdint.h>
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#endif
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#ifdef CONFIG_LIB_SYSCALL
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# include <syscall.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. 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 9"
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# elif CONFIG_SYS_RESERVED != 9
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# error "CONFIG_SYS_RESERVED must have the value 9"
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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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/* Xtensa system calls ******************************************************/
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/* SYS call 0:
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*
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* int xtensa_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 xtensa_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 xtensa_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
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*/
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#define SYS_switch_context (2)
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#ifndef CONFIG_BUILD_FLAT
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#ifdef CONFIG_LIB_SYSCALL
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/* SYS call 3:
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*
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* void xtensa_syscall_return(void);
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*/
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#define SYS_syscall_return (3)
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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, 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, int signo,
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* siginfo_t *info, 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_trampoline_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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/* SYS call 8:
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*
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* void up_pthread_exit(pthread_exitroutine_t exit, void *exit_value)
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*/
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#define SYS_pthread_exit (8)
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#endif /* !CONFIG_BUILD_FLAT */
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#endif /* CONFIG_LIB_SYSCALL */
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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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#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_XTENSA_INCLUDE_SYSCALL_H */
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