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mbed-dev/platform/mbed_semihost_api.c@1:d0dfbce63a89, 2017-02-24 (annotated)

Committer:
elmot
Date:
Fri Feb 24 21:13:56 2017 +0000
Revision:
1:d0dfbce63a89
Ready-to-copy

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elmot 1:d0dfbce63a89 1 /* mbed Microcontroller Library
elmot 1:d0dfbce63a89 2 * Copyright (c) 2006-2013 ARM Limited
elmot 1:d0dfbce63a89 3 *
elmot 1:d0dfbce63a89 4 * Licensed under the Apache License, Version 2.0 (the "License");
elmot 1:d0dfbce63a89 5 * you may not use this file except in compliance with the License.
elmot 1:d0dfbce63a89 6 * You may obtain a copy of the License at
elmot 1:d0dfbce63a89 7 *
elmot 1:d0dfbce63a89 8 * http://www.apache.org/licenses/LICENSE-2.0
elmot 1:d0dfbce63a89 9 *
elmot 1:d0dfbce63a89 10 * Unless required by applicable law or agreed to in writing, software
elmot 1:d0dfbce63a89 11 * distributed under the License is distributed on an "AS IS" BASIS,
elmot 1:d0dfbce63a89 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elmot 1:d0dfbce63a89 13 * See the License for the specific language governing permissions and
elmot 1:d0dfbce63a89 14 * limitations under the License.
elmot 1:d0dfbce63a89 15 */
elmot 1:d0dfbce63a89 16 #include "cmsis.h"
elmot 1:d0dfbce63a89 17 #include "platform/semihost_api.h"
elmot 1:d0dfbce63a89 18
elmot 1:d0dfbce63a89 19 #include <stdint.h>
elmot 1:d0dfbce63a89 20 #include <string.h>
elmot 1:d0dfbce63a89 21
elmot 1:d0dfbce63a89 22 #if DEVICE_SEMIHOST
elmot 1:d0dfbce63a89 23
elmot 1:d0dfbce63a89 24 // ARM Semihosting Commands
elmot 1:d0dfbce63a89 25 #define SYS_OPEN (0x1)
elmot 1:d0dfbce63a89 26 #define SYS_CLOSE (0x2)
elmot 1:d0dfbce63a89 27 #define SYS_WRITE (0x5)
elmot 1:d0dfbce63a89 28 #define SYS_READ (0x6)
elmot 1:d0dfbce63a89 29 #define SYS_ISTTY (0x9)
elmot 1:d0dfbce63a89 30 #define SYS_SEEK (0xa)
elmot 1:d0dfbce63a89 31 #define SYS_ENSURE (0xb)
elmot 1:d0dfbce63a89 32 #define SYS_FLEN (0xc)
elmot 1:d0dfbce63a89 33 #define SYS_REMOVE (0xe)
elmot 1:d0dfbce63a89 34 #define SYS_RENAME (0xf)
elmot 1:d0dfbce63a89 35 #define SYS_EXIT (0x18)
elmot 1:d0dfbce63a89 36
elmot 1:d0dfbce63a89 37 // mbed Semihosting Commands
elmot 1:d0dfbce63a89 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
elmot 1:d0dfbce63a89 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
elmot 1:d0dfbce63a89 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
elmot 1:d0dfbce63a89 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
elmot 1:d0dfbce63a89 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
elmot 1:d0dfbce63a89 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
elmot 1:d0dfbce63a89 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
elmot 1:d0dfbce63a89 45
elmot 1:d0dfbce63a89 46 #if DEVICE_LOCALFILESYSTEM
elmot 1:d0dfbce63a89 47 FILEHANDLE semihost_open(const char* name, int openmode) {
elmot 1:d0dfbce63a89 48 uint32_t args[3];
elmot 1:d0dfbce63a89 49 args[0] = (uint32_t)name;
elmot 1:d0dfbce63a89 50 args[1] = (uint32_t)openmode;
elmot 1:d0dfbce63a89 51 args[2] = (uint32_t)strlen(name);
elmot 1:d0dfbce63a89 52 return __semihost(SYS_OPEN, args);
elmot 1:d0dfbce63a89 53 }
elmot 1:d0dfbce63a89 54
elmot 1:d0dfbce63a89 55 int semihost_close(FILEHANDLE fh) {
elmot 1:d0dfbce63a89 56 return __semihost(SYS_CLOSE, &fh);
elmot 1:d0dfbce63a89 57 }
elmot 1:d0dfbce63a89 58
elmot 1:d0dfbce63a89 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
elmot 1:d0dfbce63a89 60 if (length == 0) return 0;
elmot 1:d0dfbce63a89 61
elmot 1:d0dfbce63a89 62 uint32_t args[3];
elmot 1:d0dfbce63a89 63 args[0] = (uint32_t)fh;
elmot 1:d0dfbce63a89 64 args[1] = (uint32_t)buffer;
elmot 1:d0dfbce63a89 65 args[2] = (uint32_t)length;
elmot 1:d0dfbce63a89 66 return __semihost(SYS_WRITE, args);
elmot 1:d0dfbce63a89 67 }
elmot 1:d0dfbce63a89 68
elmot 1:d0dfbce63a89 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
elmot 1:d0dfbce63a89 70 uint32_t args[3];
elmot 1:d0dfbce63a89 71 args[0] = (uint32_t)fh;
elmot 1:d0dfbce63a89 72 args[1] = (uint32_t)buffer;
elmot 1:d0dfbce63a89 73 args[2] = (uint32_t)length;
elmot 1:d0dfbce63a89 74 return __semihost(SYS_READ, args);
elmot 1:d0dfbce63a89 75 }
elmot 1:d0dfbce63a89 76
elmot 1:d0dfbce63a89 77 int semihost_istty(FILEHANDLE fh) {
elmot 1:d0dfbce63a89 78 return __semihost(SYS_ISTTY, &fh);
elmot 1:d0dfbce63a89 79 }
elmot 1:d0dfbce63a89 80
elmot 1:d0dfbce63a89 81 int semihost_seek(FILEHANDLE fh, long position) {
elmot 1:d0dfbce63a89 82 uint32_t args[2];
elmot 1:d0dfbce63a89 83 args[0] = (uint32_t)fh;
elmot 1:d0dfbce63a89 84 args[1] = (uint32_t)position;
elmot 1:d0dfbce63a89 85 return __semihost(SYS_SEEK, args);
elmot 1:d0dfbce63a89 86 }
elmot 1:d0dfbce63a89 87
elmot 1:d0dfbce63a89 88 int semihost_ensure(FILEHANDLE fh) {
elmot 1:d0dfbce63a89 89 return __semihost(SYS_ENSURE, &fh);
elmot 1:d0dfbce63a89 90 }
elmot 1:d0dfbce63a89 91
elmot 1:d0dfbce63a89 92 long semihost_flen(FILEHANDLE fh) {
elmot 1:d0dfbce63a89 93 return __semihost(SYS_FLEN, &fh);
elmot 1:d0dfbce63a89 94 }
elmot 1:d0dfbce63a89 95
elmot 1:d0dfbce63a89 96 int semihost_remove(const char *name) {
elmot 1:d0dfbce63a89 97 uint32_t args[2];
elmot 1:d0dfbce63a89 98 args[0] = (uint32_t)name;
elmot 1:d0dfbce63a89 99 args[1] = (uint32_t)strlen(name);
elmot 1:d0dfbce63a89 100 return __semihost(SYS_REMOVE, args);
elmot 1:d0dfbce63a89 101 }
elmot 1:d0dfbce63a89 102
elmot 1:d0dfbce63a89 103 int semihost_rename(const char *old_name, const char *new_name) {
elmot 1:d0dfbce63a89 104 uint32_t args[4];
elmot 1:d0dfbce63a89 105 args[0] = (uint32_t)old_name;
elmot 1:d0dfbce63a89 106 args[1] = (uint32_t)strlen(old_name);
elmot 1:d0dfbce63a89 107 args[0] = (uint32_t)new_name;
elmot 1:d0dfbce63a89 108 args[1] = (uint32_t)strlen(new_name);
elmot 1:d0dfbce63a89 109 return __semihost(SYS_RENAME, args);
elmot 1:d0dfbce63a89 110 }
elmot 1:d0dfbce63a89 111 #endif
elmot 1:d0dfbce63a89 112
elmot 1:d0dfbce63a89 113 int semihost_exit(void) {
elmot 1:d0dfbce63a89 114 uint32_t args[4];
elmot 1:d0dfbce63a89 115 return __semihost(SYS_EXIT, args);
elmot 1:d0dfbce63a89 116 }
elmot 1:d0dfbce63a89 117
elmot 1:d0dfbce63a89 118 int semihost_uid(char *uid) {
elmot 1:d0dfbce63a89 119 uint32_t args[2];
elmot 1:d0dfbce63a89 120 args[0] = (uint32_t)uid;
elmot 1:d0dfbce63a89 121 args[1] = DEVICE_ID_LENGTH + 1;
elmot 1:d0dfbce63a89 122 return __semihost(USR_UID, &args);
elmot 1:d0dfbce63a89 123 }
elmot 1:d0dfbce63a89 124
elmot 1:d0dfbce63a89 125 int semihost_reset(void) {
elmot 1:d0dfbce63a89 126 // Does not normally return, however if used with older firmware versions
elmot 1:d0dfbce63a89 127 // that do not support this call it will return -1.
elmot 1:d0dfbce63a89 128 return __semihost(USR_RESET, NULL);
elmot 1:d0dfbce63a89 129 }
elmot 1:d0dfbce63a89 130
elmot 1:d0dfbce63a89 131 int semihost_vbus(void) {
elmot 1:d0dfbce63a89 132 return __semihost(USR_VBUS, NULL);
elmot 1:d0dfbce63a89 133 }
elmot 1:d0dfbce63a89 134
elmot 1:d0dfbce63a89 135 int semihost_powerdown(void) {
elmot 1:d0dfbce63a89 136 return __semihost(USR_POWERDOWN, NULL);
elmot 1:d0dfbce63a89 137 }
elmot 1:d0dfbce63a89 138
elmot 1:d0dfbce63a89 139 #if DEVICE_DEBUG_AWARENESS
elmot 1:d0dfbce63a89 140
elmot 1:d0dfbce63a89 141 int semihost_connected(void) {
elmot 1:d0dfbce63a89 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
elmot 1:d0dfbce63a89 143 }
elmot 1:d0dfbce63a89 144
elmot 1:d0dfbce63a89 145 #else
elmot 1:d0dfbce63a89 146 // These processors cannot know if the interface is connect, assume so:
elmot 1:d0dfbce63a89 147 static int is_debugger_attached = 1;
elmot 1:d0dfbce63a89 148
elmot 1:d0dfbce63a89 149 int semihost_connected(void) {
elmot 1:d0dfbce63a89 150 return is_debugger_attached;
elmot 1:d0dfbce63a89 151 }
elmot 1:d0dfbce63a89 152 #endif
elmot 1:d0dfbce63a89 153
elmot 1:d0dfbce63a89 154 int semihost_disabledebug(void) {
elmot 1:d0dfbce63a89 155 #if !(DEVICE_DEBUG_AWARENESS)
elmot 1:d0dfbce63a89 156 is_debugger_attached = 0;
elmot 1:d0dfbce63a89 157 #endif
elmot 1:d0dfbce63a89 158 return __semihost(USR_DISABLEDEBUG, NULL);
elmot 1:d0dfbce63a89 159 }
elmot 1:d0dfbce63a89 160
elmot 1:d0dfbce63a89 161 #endif
elmot 1:d0dfbce63a89 162