tool/mbed/mbed-sdk/libraries/mbed/api/semihost_api.h

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 #ifndef MBED_SEMIHOST_H
  17 #define MBED_SEMIHOST_H
  18
  19 #include "device.h"
  20 #include "toolchain.h"
  21
  22 #ifdef __cplusplus
  23 extern "C" {
  24 #endif
  25
  26 #if DEVICE_SEMIHOST
  27
  28 #ifndef __CC_ARM
  29
  30 #if defined(__ICCARM__)
  31 inline int __semihost(int reason, const void *arg) {
  32     return __semihosting(reason, (void*)arg);
  33 }
  34 #else
  35
  36 #ifdef __thumb__
  37 #   define AngelSWI            0xAB
  38 #   define AngelSWIInsn        "bkpt"
  39 #   define AngelSWIAsm          bkpt
  40 #else
  41 #   define AngelSWI            0x123456
  42 #   define AngelSWIInsn        "swi"
  43 #   define AngelSWIAsm          swi
  44 #endif
  45
  46 static inline int __semihost(int reason, const void *arg) {
  47     int value;
  48
  49     asm volatile (
  50        "mov r0, %1"          "\n\t"
  51        "mov r1, %2"          "\n\t"
  52        AngelSWIInsn " %a3"   "\n\t"
  53        "mov %0, r0"
  54        : "=r" (value)                                         /* output operands             */
  55        : "r" (reason), "r" (arg), "i" (AngelSWI)              /* input operands              */
  56        : "r0", "r1", "r2", "r3", "ip", "lr", "memory", "cc"   /* list of clobbered registers */
  57     );
  58
  59     return value;
  60 }
  61 #endif
  62 #endif
  63
  64 #if DEVICE_LOCALFILESYSTEM
  65 FILEHANDLE semihost_open(const char* name, int openmode);
  66 int semihost_close (FILEHANDLE fh);
  67 int semihost_read  (FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode);
  68 int semihost_write (FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode);
  69 int semihost_ensure(FILEHANDLE fh);
  70 long semihost_flen (FILEHANDLE fh);
  71 int semihost_seek  (FILEHANDLE fh, long position);
  72 int semihost_istty (FILEHANDLE fh);
  73
  74 int semihost_remove(const char *name);
  75 int semihost_rename(const char *old_name, const char *new_name);
  76 #endif
  77
  78 int semihost_uid(char *uid);
  79 int semihost_reset(void);
  80 int semihost_vbus(void);
  81 int semihost_powerdown(void);
  82 int semihost_exit(void);
  83
  84 int semihost_connected(void);
  85 int semihost_disabledebug(void);
  86
  87 #endif
  88
  89 #ifdef __cplusplus
  90 }
  91 #endif
  92
  93 #endif