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- /****************************************************************************
- * arch/misoc/include/lm32/syscall.h
- *
- * Copyright (C) 2016 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- * Ramtin Amin <keytwo@gmail.com>
- *
- * 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.
- *
- ****************************************************************************/
- /* This file should never be included directed but, rather, only indirectly
- * through include/syscall.h or include/sys/sycall.h
- */
- #ifndef __ARCH_MISOC_INCLUDE_LM32_SYSCALL_H
- #define __ARCH_MISOC_INCLUDE_LM32_SYSCALL_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #ifndef __ASSEMBLY__
- # include <stdint.h>
- #endif
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- #define SYS_syscall 0x00
- /* Configuration ********************************************************************/
- /* SYS call 1 and 2 are defined for internal use by the LM32 port (see
- * arch/miscoc/include/lm32/syscall.h). In addition, SYS call 3 is the return from
- * a SYS call in kernel mode. The first four syscall values must, therefore, be
- * reserved (0 is not used).
- */
- #ifdef CONFIG_BUILD_KERNEL
- # ifndef CONFIG_SYS_RESERVED
- # error "CONFIG_SYS_RESERVED must be defined to the value 4"
- # elif CONFIG_SYS_RESERVED != 4
- # error "CONFIG_SYS_RESERVED must have the value 4"
- # endif
- #endif
- /* sys_call macros ******************************************************************/
- #ifndef __ASSEMBLY__
- /* Context switching system calls ***************************************************/
- /* SYS call 0: (not used) */
- /* SYS call 1:
- *
- * void up_fullcontextrestore(uint32_t *restoreregs) noreturn_function;
- */
- #define SYS_restore_context (1)
- #define up_fullcontextrestore(restoreregs) \
- (void)sys_call1(SYS_restore_context, (uintptr_t)restoreregs)
- /* SYS call 2:
- *
- * void up_switchcontext(uint32_t *saveregs, uint32_t *restoreregs);
- */
- #define SYS_switch_context (2)
- #define up_switchcontext(saveregs, restoreregs) \
- (void)sys_call2(SYS_switch_context, (uintptr_t)saveregs, (uintptr_t)restoreregs)
- #ifdef CONFIG_BUILD_KERNEL
- /* SYS call 3:
- *
- * void up_syscall_return(void);
- */
- #define SYS_syscall_return (3)
- #define up_syscall_return() (void)sys_call0(SYS_syscall_return)
- #endif
- #endif /* __ASSEMBLY__ */
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- /****************************************************************************
- * Inline functions
- ****************************************************************************/
- #ifndef __ASSEMBLY__
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- #ifdef __cplusplus
- #define EXTERN extern "C"
- extern "C"
- {
- #else
- #define EXTERN extern
- #endif
- /****************************************************************************
- * Name: up_syscall0
- *
- * Description:
- * System call SYS_ argument and no additional parameters.
- *
- ****************************************************************************/
- uintptr_t sys_call0(unsigned int nbr);
- /****************************************************************************
- * Name: up_syscall1
- *
- * Description:
- * System call SYS_ argument and one additional parameter.
- *
- ****************************************************************************/
- uintptr_t sys_call1(unsigned int nbr, uintptr_t parm1);
- /****************************************************************************
- * Name: up_syscall2
- *
- * Description:
- * System call SYS_ argument and two additional parameters.
- *
- ****************************************************************************/
- uintptr_t sys_call2(unsigned int nbr, uintptr_t parm1, uintptr_t parm2);
- /****************************************************************************
- * Name: up_syscall3
- *
- * Description:
- * System call SYS_ argument and three additional parameters.
- *
- ****************************************************************************/
- uintptr_t sys_call3(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
- uintptr_t parm3);
- /****************************************************************************
- * Name: up_syscall4
- *
- * Description:
- * System call SYS_ argument and four additional parameters.
- *
- ****************************************************************************/
- uintptr_t sys_call4(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
- uintptr_t parm3, uintptr_t parm4);
- /****************************************************************************
- * Name: up_syscall5
- *
- * Description:
- * System call SYS_ argument and five additional parameters.
- *
- ****************************************************************************/
- uintptr_t sys_call5(unsigned int nbr, uintptr_t parm1, uintptr_t parm2,
- uintptr_t parm3, uintptr_t parm4, uintptr_t parm5);
- #undef EXTERN
- #ifdef __cplusplus
- }
- #endif
- #endif /* __ASSEMBLY__ */
- #endif /* __ARCH_MISOC_INCLUDE_LM32_SYSCALL_H */
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