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/************************************************************************************
* arch/arm/src/armv6-m/svcall.h
*
* Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_ARMV6_M_SVCALL_H
#define __ARCH_ARM_SRC_ARMV6_M_SVCALL_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#ifdef CONFIG_LIB_SYSCALL
# include <syscall.h>
#endif
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* 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.
*/
#ifdef CONFIG_LIB_SYSCALL
# ifdef CONFIG_BUILD_PROTECTED
# ifndef CONFIG_SYS_RESERVED
# error "CONFIG_SYS_RESERVED must be defined to have the value 8"
# elif CONFIG_SYS_RESERVED != 8
# error "CONFIG_SYS_RESERVED must have the value 8"
# endif
# else
# ifndef CONFIG_SYS_RESERVED
# error "CONFIG_SYS_RESERVED must be defined to have the value 4"
# elif CONFIG_SYS_RESERVED != 4
# error "CONFIG_SYS_RESERVED must have the value 4"
# endif
# endif
#endif
/* Cortex M0 system calls ***********************************************************/
/* SYS call 0:
*
* int up_saveusercontext(uint32_t *saveregs);
*/
#define SYS_save_context (0)
/* SYS call 1:
*
* void up_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
*/
#define SYS_restore_context (1)
/* SYS call 2:
*
* void up_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
*/
#define SYS_switch_context (2)
#ifdef CONFIG_LIB_SYSCALL
/* SYS call 3:
*
* void up_syscall_return(void);
*/
#define SYS_syscall_return (3)
#ifdef CONFIG_BUILD_PROTECTED
/* SYS call 4:
*
* void up_task_start(main_t taskentry, int argc, FAR char *argv[])
* noreturn_function;
*/
#define SYS_task_start (4)
/* SYS call 5:
*
* void up_pthread_start(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, FAR siginfo_t *info,
* FAR void *ucontext);
*/
#define SYS_signal_handler (6)
/* SYS call 7:
*
* void signal_handler_return(void);
*/
#define SYS_signal_handler_return (7)
#endif /* CONFIG_BUILD_PROTECTED */
#endif /* CONFIG_LIB_SYSCALL */
/************************************************************************************
* Inline Functions
************************************************************************************/
#endif /* __ARCH_ARM_SRC_ARMV6_M_SVCALL_H */
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