Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

platform/semihost_api.h@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1
elessair 0:f269e3021894 2 /** \addtogroup platform */
elessair 0:f269e3021894 3 /** @{*/
elessair 0:f269e3021894 4 /* mbed Microcontroller Library
elessair 0:f269e3021894 5 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 8 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 */
elessair 0:f269e3021894 19 #ifndef MBED_SEMIHOST_H
elessair 0:f269e3021894 20 #define MBED_SEMIHOST_H
elessair 0:f269e3021894 21
elessair 0:f269e3021894 22 #include "device.h"
elessair 0:f269e3021894 23 #include "platform/toolchain.h"
elessair 0:f269e3021894 24
elessair 0:f269e3021894 25 #ifdef __cplusplus
elessair 0:f269e3021894 26 extern "C" {
elessair 0:f269e3021894 27 #endif
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 #if DEVICE_SEMIHOST
elessair 0:f269e3021894 30
elessair 0:f269e3021894 31 #ifndef __CC_ARM
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 #if defined(__ICCARM__)
elessair 0:f269e3021894 34 static inline int __semihost(int reason, const void *arg) {
elessair 0:f269e3021894 35 return __semihosting(reason, (void*)arg);
elessair 0:f269e3021894 36 }
elessair 0:f269e3021894 37 #else
elessair 0:f269e3021894 38
elessair 0:f269e3021894 39 #ifdef __thumb__
elessair 0:f269e3021894 40 # define AngelSWI 0xAB
elessair 0:f269e3021894 41 # define AngelSWIInsn "bkpt"
elessair 0:f269e3021894 42 # define AngelSWIAsm bkpt
elessair 0:f269e3021894 43 #else
elessair 0:f269e3021894 44 # define AngelSWI 0x123456
elessair 0:f269e3021894 45 # define AngelSWIInsn "swi"
elessair 0:f269e3021894 46 # define AngelSWIAsm swi
elessair 0:f269e3021894 47 #endif
elessair 0:f269e3021894 48
elessair 0:f269e3021894 49 static inline int __semihost(int reason, const void *arg) {
elessair 0:f269e3021894 50 int value;
elessair 0:f269e3021894 51
elessair 0:f269e3021894 52 asm volatile (
elessair 0:f269e3021894 53 "mov r0, %1" "\n\t"
elessair 0:f269e3021894 54 "mov r1, %2" "\n\t"
elessair 0:f269e3021894 55 AngelSWIInsn " %a3" "\n\t"
elessair 0:f269e3021894 56 "mov %0, r0"
elessair 0:f269e3021894 57 : "=r" (value) /* output operands */
elessair 0:f269e3021894 58 : "r" (reason), "r" (arg), "i" (AngelSWI) /* input operands */
elessair 0:f269e3021894 59 : "r0", "r1", "r2", "r3", "ip", "lr", "memory", "cc" /* list of clobbered registers */
elessair 0:f269e3021894 60 );
elessair 0:f269e3021894 61
elessair 0:f269e3021894 62 return value;
elessair 0:f269e3021894 63 }
elessair 0:f269e3021894 64 #endif
elessair 0:f269e3021894 65 #endif
elessair 0:f269e3021894 66
elessair 0:f269e3021894 67 #if DEVICE_LOCALFILESYSTEM
elessair 0:f269e3021894 68 FILEHANDLE semihost_open(const char* name, int openmode);
elessair 0:f269e3021894 69 int semihost_close (FILEHANDLE fh);
elessair 0:f269e3021894 70 int semihost_read (FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode);
elessair 0:f269e3021894 71 int semihost_write (FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode);
elessair 0:f269e3021894 72 int semihost_ensure(FILEHANDLE fh);
elessair 0:f269e3021894 73 long semihost_flen (FILEHANDLE fh);
elessair 0:f269e3021894 74 int semihost_seek (FILEHANDLE fh, long position);
elessair 0:f269e3021894 75 int semihost_istty (FILEHANDLE fh);
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 int semihost_remove(const char *name);
elessair 0:f269e3021894 78 int semihost_rename(const char *old_name, const char *new_name);
elessair 0:f269e3021894 79 #endif
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 int semihost_uid(char *uid);
elessair 0:f269e3021894 82 int semihost_reset(void);
elessair 0:f269e3021894 83 int semihost_vbus(void);
elessair 0:f269e3021894 84 int semihost_powerdown(void);
elessair 0:f269e3021894 85 int semihost_exit(void);
elessair 0:f269e3021894 86
elessair 0:f269e3021894 87 int semihost_connected(void);
elessair 0:f269e3021894 88 int semihost_disabledebug(void);
elessair 0:f269e3021894 89
elessair 0:f269e3021894 90 #endif
elessair 0:f269e3021894 91
elessair 0:f269e3021894 92 #ifdef __cplusplus
elessair 0:f269e3021894 93 }
elessair 0:f269e3021894 94 #endif
elessair 0:f269e3021894 95
elessair 0:f269e3021894 96 #endif
elessair 0:f269e3021894 97
elessair 0:f269e3021894 98 /** @}*/