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common/semihost_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 17 #include "semihost_api.h"
bogdanm 0:9b334a45a8ff 18
bogdanm 0:9b334a45a8ff 19 #include <stdint.h>
bogdanm 0:9b334a45a8ff 20 #include <string.h>
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 #if DEVICE_SEMIHOST
bogdanm 0:9b334a45a8ff 23
bogdanm 0:9b334a45a8ff 24 // ARM Semihosting Commands
bogdanm 0:9b334a45a8ff 25 #define SYS_OPEN (0x1)
bogdanm 0:9b334a45a8ff 26 #define SYS_CLOSE (0x2)
bogdanm 0:9b334a45a8ff 27 #define SYS_WRITE (0x5)
bogdanm 0:9b334a45a8ff 28 #define SYS_READ (0x6)
bogdanm 0:9b334a45a8ff 29 #define SYS_ISTTY (0x9)
bogdanm 0:9b334a45a8ff 30 #define SYS_SEEK (0xa)
bogdanm 0:9b334a45a8ff 31 #define SYS_ENSURE (0xb)
bogdanm 0:9b334a45a8ff 32 #define SYS_FLEN (0xc)
bogdanm 0:9b334a45a8ff 33 #define SYS_REMOVE (0xe)
bogdanm 0:9b334a45a8ff 34 #define SYS_RENAME (0xf)
bogdanm 0:9b334a45a8ff 35 #define SYS_EXIT (0x18)
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 // mbed Semihosting Commands
bogdanm 0:9b334a45a8ff 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
bogdanm 0:9b334a45a8ff 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
bogdanm 0:9b334a45a8ff 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
bogdanm 0:9b334a45a8ff 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
bogdanm 0:9b334a45a8ff 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
bogdanm 0:9b334a45a8ff 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
bogdanm 0:9b334a45a8ff 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
bogdanm 0:9b334a45a8ff 45
bogdanm 0:9b334a45a8ff 46 #if DEVICE_LOCALFILESYSTEM
bogdanm 0:9b334a45a8ff 47 FILEHANDLE semihost_open(const char* name, int openmode) {
bogdanm 0:9b334a45a8ff 48 uint32_t args[3];
bogdanm 0:9b334a45a8ff 49 args[0] = (uint32_t)name;
bogdanm 0:9b334a45a8ff 50 args[1] = (uint32_t)openmode;
bogdanm 0:9b334a45a8ff 51 args[2] = (uint32_t)strlen(name);
bogdanm 0:9b334a45a8ff 52 return __semihost(SYS_OPEN, args);
bogdanm 0:9b334a45a8ff 53 }
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 int semihost_close(FILEHANDLE fh) {
bogdanm 0:9b334a45a8ff 56 return __semihost(SYS_CLOSE, &fh);
bogdanm 0:9b334a45a8ff 57 }
bogdanm 0:9b334a45a8ff 58
bogdanm 0:9b334a45a8ff 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
bogdanm 0:9b334a45a8ff 60 if (length == 0) return 0;
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 uint32_t args[3];
bogdanm 0:9b334a45a8ff 63 args[0] = (uint32_t)fh;
bogdanm 0:9b334a45a8ff 64 args[1] = (uint32_t)buffer;
bogdanm 0:9b334a45a8ff 65 args[2] = (uint32_t)length;
bogdanm 0:9b334a45a8ff 66 return __semihost(SYS_WRITE, args);
bogdanm 0:9b334a45a8ff 67 }
bogdanm 0:9b334a45a8ff 68
bogdanm 0:9b334a45a8ff 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
bogdanm 0:9b334a45a8ff 70 uint32_t args[3];
bogdanm 0:9b334a45a8ff 71 args[0] = (uint32_t)fh;
bogdanm 0:9b334a45a8ff 72 args[1] = (uint32_t)buffer;
bogdanm 0:9b334a45a8ff 73 args[2] = (uint32_t)length;
bogdanm 0:9b334a45a8ff 74 return __semihost(SYS_READ, args);
bogdanm 0:9b334a45a8ff 75 }
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 int semihost_istty(FILEHANDLE fh) {
bogdanm 0:9b334a45a8ff 78 return __semihost(SYS_ISTTY, &fh);
bogdanm 0:9b334a45a8ff 79 }
bogdanm 0:9b334a45a8ff 80
bogdanm 0:9b334a45a8ff 81 int semihost_seek(FILEHANDLE fh, long position) {
bogdanm 0:9b334a45a8ff 82 uint32_t args[2];
bogdanm 0:9b334a45a8ff 83 args[0] = (uint32_t)fh;
bogdanm 0:9b334a45a8ff 84 args[1] = (uint32_t)position;
bogdanm 0:9b334a45a8ff 85 return __semihost(SYS_SEEK, args);
bogdanm 0:9b334a45a8ff 86 }
bogdanm 0:9b334a45a8ff 87
bogdanm 0:9b334a45a8ff 88 int semihost_ensure(FILEHANDLE fh) {
bogdanm 0:9b334a45a8ff 89 return __semihost(SYS_ENSURE, &fh);
bogdanm 0:9b334a45a8ff 90 }
bogdanm 0:9b334a45a8ff 91
bogdanm 0:9b334a45a8ff 92 long semihost_flen(FILEHANDLE fh) {
bogdanm 0:9b334a45a8ff 93 return __semihost(SYS_FLEN, &fh);
bogdanm 0:9b334a45a8ff 94 }
bogdanm 0:9b334a45a8ff 95
bogdanm 0:9b334a45a8ff 96 int semihost_remove(const char *name) {
bogdanm 0:9b334a45a8ff 97 uint32_t args[2];
bogdanm 0:9b334a45a8ff 98 args[0] = (uint32_t)name;
bogdanm 0:9b334a45a8ff 99 args[1] = (uint32_t)strlen(name);
bogdanm 0:9b334a45a8ff 100 return __semihost(SYS_REMOVE, args);
bogdanm 0:9b334a45a8ff 101 }
bogdanm 0:9b334a45a8ff 102
bogdanm 0:9b334a45a8ff 103 int semihost_rename(const char *old_name, const char *new_name) {
bogdanm 0:9b334a45a8ff 104 uint32_t args[4];
bogdanm 0:9b334a45a8ff 105 args[0] = (uint32_t)old_name;
bogdanm 0:9b334a45a8ff 106 args[1] = (uint32_t)strlen(old_name);
bogdanm 0:9b334a45a8ff 107 args[0] = (uint32_t)new_name;
bogdanm 0:9b334a45a8ff 108 args[1] = (uint32_t)strlen(new_name);
bogdanm 0:9b334a45a8ff 109 return __semihost(SYS_RENAME, args);
bogdanm 0:9b334a45a8ff 110 }
bogdanm 0:9b334a45a8ff 111 #endif
bogdanm 0:9b334a45a8ff 112
bogdanm 0:9b334a45a8ff 113 int semihost_exit(void) {
bogdanm 0:9b334a45a8ff 114 uint32_t args[4];
bogdanm 0:9b334a45a8ff 115 return __semihost(SYS_EXIT, args);
bogdanm 0:9b334a45a8ff 116 }
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 int semihost_uid(char *uid) {
bogdanm 0:9b334a45a8ff 119 uint32_t args[2];
bogdanm 0:9b334a45a8ff 120 args[0] = (uint32_t)uid;
bogdanm 0:9b334a45a8ff 121 args[1] = DEVICE_ID_LENGTH + 1;
bogdanm 0:9b334a45a8ff 122 return __semihost(USR_UID, &args);
bogdanm 0:9b334a45a8ff 123 }
bogdanm 0:9b334a45a8ff 124
bogdanm 0:9b334a45a8ff 125 int semihost_reset(void) {
bogdanm 0:9b334a45a8ff 126 // Does not normally return, however if used with older firmware versions
bogdanm 0:9b334a45a8ff 127 // that do not support this call it will return -1.
bogdanm 0:9b334a45a8ff 128 return __semihost(USR_RESET, NULL);
bogdanm 0:9b334a45a8ff 129 }
bogdanm 0:9b334a45a8ff 130
bogdanm 0:9b334a45a8ff 131 int semihost_vbus(void) {
bogdanm 0:9b334a45a8ff 132 return __semihost(USR_VBUS, NULL);
bogdanm 0:9b334a45a8ff 133 }
bogdanm 0:9b334a45a8ff 134
bogdanm 0:9b334a45a8ff 135 int semihost_powerdown(void) {
bogdanm 0:9b334a45a8ff 136 return __semihost(USR_POWERDOWN, NULL);
bogdanm 0:9b334a45a8ff 137 }
bogdanm 0:9b334a45a8ff 138
bogdanm 0:9b334a45a8ff 139 #if DEVICE_DEBUG_AWARENESS
bogdanm 0:9b334a45a8ff 140
bogdanm 0:9b334a45a8ff 141 int semihost_connected(void) {
bogdanm 0:9b334a45a8ff 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
bogdanm 0:9b334a45a8ff 143 }
bogdanm 0:9b334a45a8ff 144
bogdanm 0:9b334a45a8ff 145 #else
bogdanm 0:9b334a45a8ff 146 // These processors cannot know if the interface is connect, assume so:
bogdanm 0:9b334a45a8ff 147 static int is_debugger_attached = 1;
bogdanm 0:9b334a45a8ff 148
bogdanm 0:9b334a45a8ff 149 int semihost_connected(void) {
bogdanm 0:9b334a45a8ff 150 return is_debugger_attached;
bogdanm 0:9b334a45a8ff 151 }
bogdanm 0:9b334a45a8ff 152 #endif
bogdanm 0:9b334a45a8ff 153
bogdanm 0:9b334a45a8ff 154 int semihost_disabledebug(void) {
bogdanm 0:9b334a45a8ff 155 #if !(DEVICE_DEBUG_AWARENESS)
bogdanm 0:9b334a45a8ff 156 is_debugger_attached = 0;
bogdanm 0:9b334a45a8ff 157 #endif
bogdanm 0:9b334a45a8ff 158 return __semihost(USR_DISABLEDEBUG, NULL);
bogdanm 0:9b334a45a8ff 159 }
bogdanm 0:9b334a45a8ff 160
bogdanm 0:9b334a45a8ff 161 #endif
bogdanm 0:9b334a45a8ff 162