Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

platform/mbed_semihost_api.c@166:33361e55dd8c, 2017-08-23 (annotated)

Committer:
iftaziz
Date:
Wed Aug 23 10:32:38 2017 +0000
Revision:
166:33361e55dd8c
Parent:
162:e13f6fdb2ac4 
r1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 5 * you may not use this file except in compliance with the License.
<> 149:156823d33999 6 * You may obtain a copy of the License at
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 9 *
<> 149:156823d33999 10 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 13 * See the License for the specific language governing permissions and
<> 149:156823d33999 14 * limitations under the License.
<> 149:156823d33999 15 */
<> 149:156823d33999 16 #include "cmsis.h"
<> 160:d5399cc887bb 17 #include "platform/mbed_semihost_api.h"
<> 149:156823d33999 18
<> 149:156823d33999 19 #include <stdint.h>
<> 149:156823d33999 20 #include <string.h>
<> 149:156823d33999 21
<> 149:156823d33999 22 #if DEVICE_SEMIHOST
<> 149:156823d33999 23
<> 149:156823d33999 24 // ARM Semihosting Commands
<> 149:156823d33999 25 #define SYS_OPEN (0x1)
<> 149:156823d33999 26 #define SYS_CLOSE (0x2)
<> 149:156823d33999 27 #define SYS_WRITE (0x5)
<> 149:156823d33999 28 #define SYS_READ (0x6)
<> 149:156823d33999 29 #define SYS_ISTTY (0x9)
<> 149:156823d33999 30 #define SYS_SEEK (0xa)
<> 149:156823d33999 31 #define SYS_ENSURE (0xb)
<> 149:156823d33999 32 #define SYS_FLEN (0xc)
<> 149:156823d33999 33 #define SYS_REMOVE (0xe)
<> 149:156823d33999 34 #define SYS_RENAME (0xf)
<> 149:156823d33999 35 #define SYS_EXIT (0x18)
<> 149:156823d33999 36
<> 149:156823d33999 37 // mbed Semihosting Commands
<> 149:156823d33999 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
<> 149:156823d33999 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
<> 149:156823d33999 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
<> 149:156823d33999 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
<> 149:156823d33999 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
<> 149:156823d33999 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
<> 149:156823d33999 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
<> 149:156823d33999 45
<> 149:156823d33999 46 #if DEVICE_LOCALFILESYSTEM
<> 149:156823d33999 47 FILEHANDLE semihost_open(const char* name, int openmode) {
<> 149:156823d33999 48 uint32_t args[3];
<> 149:156823d33999 49 args[0] = (uint32_t)name;
<> 149:156823d33999 50 args[1] = (uint32_t)openmode;
<> 149:156823d33999 51 args[2] = (uint32_t)strlen(name);
<> 149:156823d33999 52 return __semihost(SYS_OPEN, args);
<> 149:156823d33999 53 }
<> 149:156823d33999 54
<> 149:156823d33999 55 int semihost_close(FILEHANDLE fh) {
<> 149:156823d33999 56 return __semihost(SYS_CLOSE, &fh);
<> 149:156823d33999 57 }
<> 149:156823d33999 58
<> 149:156823d33999 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
<> 149:156823d33999 60 if (length == 0) return 0;
<> 149:156823d33999 61
<> 149:156823d33999 62 uint32_t args[3];
<> 149:156823d33999 63 args[0] = (uint32_t)fh;
<> 149:156823d33999 64 args[1] = (uint32_t)buffer;
<> 149:156823d33999 65 args[2] = (uint32_t)length;
<> 149:156823d33999 66 return __semihost(SYS_WRITE, args);
<> 149:156823d33999 67 }
<> 149:156823d33999 68
<> 149:156823d33999 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
<> 149:156823d33999 70 uint32_t args[3];
<> 149:156823d33999 71 args[0] = (uint32_t)fh;
<> 149:156823d33999 72 args[1] = (uint32_t)buffer;
<> 149:156823d33999 73 args[2] = (uint32_t)length;
<> 149:156823d33999 74 return __semihost(SYS_READ, args);
<> 149:156823d33999 75 }
<> 149:156823d33999 76
<> 149:156823d33999 77 int semihost_istty(FILEHANDLE fh) {
<> 149:156823d33999 78 return __semihost(SYS_ISTTY, &fh);
<> 149:156823d33999 79 }
<> 149:156823d33999 80
<> 149:156823d33999 81 int semihost_seek(FILEHANDLE fh, long position) {
<> 149:156823d33999 82 uint32_t args[2];
<> 149:156823d33999 83 args[0] = (uint32_t)fh;
<> 149:156823d33999 84 args[1] = (uint32_t)position;
<> 149:156823d33999 85 return __semihost(SYS_SEEK, args);
<> 149:156823d33999 86 }
<> 149:156823d33999 87
<> 149:156823d33999 88 int semihost_ensure(FILEHANDLE fh) {
<> 149:156823d33999 89 return __semihost(SYS_ENSURE, &fh);
<> 149:156823d33999 90 }
<> 149:156823d33999 91
<> 149:156823d33999 92 long semihost_flen(FILEHANDLE fh) {
<> 149:156823d33999 93 return __semihost(SYS_FLEN, &fh);
<> 149:156823d33999 94 }
<> 149:156823d33999 95
<> 149:156823d33999 96 int semihost_remove(const char *name) {
<> 149:156823d33999 97 uint32_t args[2];
<> 149:156823d33999 98 args[0] = (uint32_t)name;
<> 149:156823d33999 99 args[1] = (uint32_t)strlen(name);
<> 149:156823d33999 100 return __semihost(SYS_REMOVE, args);
<> 149:156823d33999 101 }
<> 149:156823d33999 102
<> 149:156823d33999 103 int semihost_rename(const char *old_name, const char *new_name) {
<> 149:156823d33999 104 uint32_t args[4];
<> 149:156823d33999 105 args[0] = (uint32_t)old_name;
<> 149:156823d33999 106 args[1] = (uint32_t)strlen(old_name);
<> 149:156823d33999 107 args[0] = (uint32_t)new_name;
<> 149:156823d33999 108 args[1] = (uint32_t)strlen(new_name);
<> 149:156823d33999 109 return __semihost(SYS_RENAME, args);
<> 149:156823d33999 110 }
<> 149:156823d33999 111 #endif
<> 149:156823d33999 112
<> 149:156823d33999 113 int semihost_exit(void) {
<> 149:156823d33999 114 uint32_t args[4];
<> 149:156823d33999 115 return __semihost(SYS_EXIT, args);
<> 149:156823d33999 116 }
<> 149:156823d33999 117
<> 149:156823d33999 118 int semihost_uid(char *uid) {
<> 149:156823d33999 119 uint32_t args[2];
<> 149:156823d33999 120 args[0] = (uint32_t)uid;
<> 149:156823d33999 121 args[1] = DEVICE_ID_LENGTH + 1;
<> 149:156823d33999 122 return __semihost(USR_UID, &args);
<> 149:156823d33999 123 }
<> 149:156823d33999 124
<> 149:156823d33999 125 int semihost_reset(void) {
<> 149:156823d33999 126 // Does not normally return, however if used with older firmware versions
<> 149:156823d33999 127 // that do not support this call it will return -1.
<> 149:156823d33999 128 return __semihost(USR_RESET, NULL);
<> 149:156823d33999 129 }
<> 149:156823d33999 130
<> 149:156823d33999 131 int semihost_vbus(void) {
<> 149:156823d33999 132 return __semihost(USR_VBUS, NULL);
<> 149:156823d33999 133 }
<> 149:156823d33999 134
<> 149:156823d33999 135 int semihost_powerdown(void) {
<> 149:156823d33999 136 return __semihost(USR_POWERDOWN, NULL);
<> 149:156823d33999 137 }
<> 149:156823d33999 138
<> 149:156823d33999 139 #if DEVICE_DEBUG_AWARENESS
<> 149:156823d33999 140
<> 149:156823d33999 141 int semihost_connected(void) {
<> 149:156823d33999 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
<> 149:156823d33999 143 }
<> 149:156823d33999 144
<> 149:156823d33999 145 #else
<> 149:156823d33999 146 // These processors cannot know if the interface is connect, assume so:
<> 149:156823d33999 147 static int is_debugger_attached = 1;
<> 149:156823d33999 148
<> 149:156823d33999 149 int semihost_connected(void) {
<> 149:156823d33999 150 return is_debugger_attached;
<> 149:156823d33999 151 }
<> 149:156823d33999 152 #endif
<> 149:156823d33999 153
<> 149:156823d33999 154 int semihost_disabledebug(void) {
<> 162:e13f6fdb2ac4 155 uint32_t args[1];
<> 149:156823d33999 156 #if !(DEVICE_DEBUG_AWARENESS)
<> 149:156823d33999 157 is_debugger_attached = 0;
<> 149:156823d33999 158 #endif
<> 162:e13f6fdb2ac4 159 return __semihost(USR_DISABLEDEBUG, &args);
<> 149:156823d33999 160 }
<> 149:156823d33999 161
<> 149:156823d33999 162 #endif
<> 149:156823d33999 163