| /**************************************************************************** |
| * arch/misoc/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_MISOC_INCLUDE_SYSCALL_H |
| #define __ARCH_MISOC_INCLUDE_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 MINERVA port (see |
| * arch/miscoc/include/minerva/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). |
| */ |
| |
| #ifndef CONFIG_BUILD_FLAT |
| # define CONFIG_SYS_RESERVED 4 |
| #else |
| # define CONFIG_SYS_RESERVED 3 |
| #endif |
| |
| /* sys_call macros **********************************************************/ |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* Context switching system calls *******************************************/ |
| |
| /* SYS call 0: |
| * |
| * int up_saveusercontext(void *saveregs); |
| */ |
| |
| #define SYS_save_context (0) |
| |
| /* SYS call 1: |
| * |
| * void up_fullcontextrestore(uint32_t *restoreregs) noreturn_function; |
| */ |
| |
| #define SYS_restore_context (1) |
| #define up_fullcontextrestore(restoreregs) \ |
| sys_call1(SYS_restore_context, (uintptr_t)restoreregs) |
| |
| /* SYS call 2: |
| * |
| * void misoc_switchcontext(uint32_t *saveregs, uint32_t *restoreregs); |
| */ |
| |
| #define SYS_switch_context (2) |
| #define misoc_switchcontext(saveregs, restoreregs) \ |
| 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() sys_call0(SYS_syscall_return) |
| |
| #endif |
| |
| /**************************************************************************** |
| * Public Types |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Inline functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * 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_SYSCALL_H */ |