mbed_semihost_api.h

00001 
00002 /* mbed Microcontroller Library
00003  * Copyright (c) 2006-2013 ARM Limited
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 #ifndef MBED_SEMIHOST_H
00018 #define MBED_SEMIHOST_H
00019 
00020 #include "device.h"
00021 #include "platform/mbed_toolchain.h"
00022 
00023 #ifdef __cplusplus
00024 extern "C" {
00025 #endif
00026 
00027 #if DEVICE_SEMIHOST
00028 
00029 #if !defined(__CC_ARM) && !defined(__ARMCC_VERSION)
00030 
00031 #if defined(__ICCARM__)
00032 static inline int __semihost(int reason, const void *arg) {
00033     return __semihosting(reason, (void*)arg);
00034 }
00035 #else
00036 
00037 #ifdef __thumb__
00038 #   define AngelSWI            0xAB
00039 #   define AngelSWIInsn        "bkpt"
00040 #   define AngelSWIAsm          bkpt
00041 #else
00042 #   define AngelSWI            0x123456
00043 #   define AngelSWIInsn        "swi"
00044 #   define AngelSWIAsm          swi
00045 #endif
00046 
00047 static inline int __semihost(int reason, const void *arg) {
00048     int value;
00049 
00050     asm volatile (
00051        "mov r0, %1"          "\n\t"
00052        "mov r1, %2"          "\n\t"
00053        AngelSWIInsn " %a3"   "\n\t"
00054        "mov %0, r0"
00055        : "=r" (value)                                         /* output operands             */
00056        : "r" (reason), "r" (arg), "i" (AngelSWI)              /* input operands              */
00057        : "r0", "r1", "r2", "r3", "ip", "lr", "memory", "cc"   /* list of clobbered registers */
00058     );
00059 
00060     return value;
00061 }
00062 #endif
00063 #endif
00064 
00065 #if DEVICE_LOCALFILESYSTEM
00066 FILEHANDLE semihost_open(const char* name, int openmode);
00067 int semihost_close (FILEHANDLE fh);
00068 int semihost_read  (FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode);
00069 int semihost_write (FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode);
00070 int semihost_ensure(FILEHANDLE fh);
00071 long semihost_flen (FILEHANDLE fh);
00072 int semihost_seek  (FILEHANDLE fh, long position);
00073 int semihost_istty (FILEHANDLE fh);
00074 
00075 int semihost_remove(const char *name);
00076 int semihost_rename(const char *old_name, const char *new_name);
00077 #endif
00078 
00079 int semihost_uid(char *uid);
00080 int semihost_reset(void);
00081 int semihost_vbus(void);
00082 int semihost_powerdown(void);
00083 int semihost_exit(void);
00084 
00085 int semihost_connected(void);
00086 int semihost_disabledebug(void);
00087 
00088 #endif
00089 
00090 #ifdef __cplusplus
00091 }
00092 #endif
00093 
00094 #endif
00095 
00096