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