Greg Steiert / pegasus_dev

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Dependents:   blinky_max32630fthr

platform/mbed_semihost_api.c@0:5c4d7b2438d3, 2016-11-11 (annotated)

Committer:
switches
Date:
Fri Nov 11 20:59:50 2016 +0000
Revision:
0:5c4d7b2438d3
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /* mbed Microcontroller Library
switches 0:5c4d7b2438d3 2 * Copyright (c) 2006-2013 ARM Limited
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
switches 0:5c4d7b2438d3 5 * you may not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 6 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 7 *
switches 0:5c4d7b2438d3 8 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 9 *
switches 0:5c4d7b2438d3 10 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
switches 0:5c4d7b2438d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 13 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 14 * limitations under the License.
switches 0:5c4d7b2438d3 15 */
switches 0:5c4d7b2438d3 16 #include "cmsis.h"
switches 0:5c4d7b2438d3 17 #include "platform/semihost_api.h"
switches 0:5c4d7b2438d3 18
switches 0:5c4d7b2438d3 19 #include <stdint.h>
switches 0:5c4d7b2438d3 20 #include <string.h>
switches 0:5c4d7b2438d3 21
switches 0:5c4d7b2438d3 22 #if DEVICE_SEMIHOST
switches 0:5c4d7b2438d3 23
switches 0:5c4d7b2438d3 24 // ARM Semihosting Commands
switches 0:5c4d7b2438d3 25 #define SYS_OPEN (0x1)
switches 0:5c4d7b2438d3 26 #define SYS_CLOSE (0x2)
switches 0:5c4d7b2438d3 27 #define SYS_WRITE (0x5)
switches 0:5c4d7b2438d3 28 #define SYS_READ (0x6)
switches 0:5c4d7b2438d3 29 #define SYS_ISTTY (0x9)
switches 0:5c4d7b2438d3 30 #define SYS_SEEK (0xa)
switches 0:5c4d7b2438d3 31 #define SYS_ENSURE (0xb)
switches 0:5c4d7b2438d3 32 #define SYS_FLEN (0xc)
switches 0:5c4d7b2438d3 33 #define SYS_REMOVE (0xe)
switches 0:5c4d7b2438d3 34 #define SYS_RENAME (0xf)
switches 0:5c4d7b2438d3 35 #define SYS_EXIT (0x18)
switches 0:5c4d7b2438d3 36
switches 0:5c4d7b2438d3 37 // mbed Semihosting Commands
switches 0:5c4d7b2438d3 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
switches 0:5c4d7b2438d3 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
switches 0:5c4d7b2438d3 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
switches 0:5c4d7b2438d3 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
switches 0:5c4d7b2438d3 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
switches 0:5c4d7b2438d3 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
switches 0:5c4d7b2438d3 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
switches 0:5c4d7b2438d3 45
switches 0:5c4d7b2438d3 46 #if DEVICE_LOCALFILESYSTEM
switches 0:5c4d7b2438d3 47 FILEHANDLE semihost_open(const char* name, int openmode) {
switches 0:5c4d7b2438d3 48 uint32_t args[3];
switches 0:5c4d7b2438d3 49 args[0] = (uint32_t)name;
switches 0:5c4d7b2438d3 50 args[1] = (uint32_t)openmode;
switches 0:5c4d7b2438d3 51 args[2] = (uint32_t)strlen(name);
switches 0:5c4d7b2438d3 52 return __semihost(SYS_OPEN, args);
switches 0:5c4d7b2438d3 53 }
switches 0:5c4d7b2438d3 54
switches 0:5c4d7b2438d3 55 int semihost_close(FILEHANDLE fh) {
switches 0:5c4d7b2438d3 56 return __semihost(SYS_CLOSE, &fh);
switches 0:5c4d7b2438d3 57 }
switches 0:5c4d7b2438d3 58
switches 0:5c4d7b2438d3 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
switches 0:5c4d7b2438d3 60 if (length == 0) return 0;
switches 0:5c4d7b2438d3 61
switches 0:5c4d7b2438d3 62 uint32_t args[3];
switches 0:5c4d7b2438d3 63 args[0] = (uint32_t)fh;
switches 0:5c4d7b2438d3 64 args[1] = (uint32_t)buffer;
switches 0:5c4d7b2438d3 65 args[2] = (uint32_t)length;
switches 0:5c4d7b2438d3 66 return __semihost(SYS_WRITE, args);
switches 0:5c4d7b2438d3 67 }
switches 0:5c4d7b2438d3 68
switches 0:5c4d7b2438d3 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
switches 0:5c4d7b2438d3 70 uint32_t args[3];
switches 0:5c4d7b2438d3 71 args[0] = (uint32_t)fh;
switches 0:5c4d7b2438d3 72 args[1] = (uint32_t)buffer;
switches 0:5c4d7b2438d3 73 args[2] = (uint32_t)length;
switches 0:5c4d7b2438d3 74 return __semihost(SYS_READ, args);
switches 0:5c4d7b2438d3 75 }
switches 0:5c4d7b2438d3 76
switches 0:5c4d7b2438d3 77 int semihost_istty(FILEHANDLE fh) {
switches 0:5c4d7b2438d3 78 return __semihost(SYS_ISTTY, &fh);
switches 0:5c4d7b2438d3 79 }
switches 0:5c4d7b2438d3 80
switches 0:5c4d7b2438d3 81 int semihost_seek(FILEHANDLE fh, long position) {
switches 0:5c4d7b2438d3 82 uint32_t args[2];
switches 0:5c4d7b2438d3 83 args[0] = (uint32_t)fh;
switches 0:5c4d7b2438d3 84 args[1] = (uint32_t)position;
switches 0:5c4d7b2438d3 85 return __semihost(SYS_SEEK, args);
switches 0:5c4d7b2438d3 86 }
switches 0:5c4d7b2438d3 87
switches 0:5c4d7b2438d3 88 int semihost_ensure(FILEHANDLE fh) {
switches 0:5c4d7b2438d3 89 return __semihost(SYS_ENSURE, &fh);
switches 0:5c4d7b2438d3 90 }
switches 0:5c4d7b2438d3 91
switches 0:5c4d7b2438d3 92 long semihost_flen(FILEHANDLE fh) {
switches 0:5c4d7b2438d3 93 return __semihost(SYS_FLEN, &fh);
switches 0:5c4d7b2438d3 94 }
switches 0:5c4d7b2438d3 95
switches 0:5c4d7b2438d3 96 int semihost_remove(const char *name) {
switches 0:5c4d7b2438d3 97 uint32_t args[2];
switches 0:5c4d7b2438d3 98 args[0] = (uint32_t)name;
switches 0:5c4d7b2438d3 99 args[1] = (uint32_t)strlen(name);
switches 0:5c4d7b2438d3 100 return __semihost(SYS_REMOVE, args);
switches 0:5c4d7b2438d3 101 }
switches 0:5c4d7b2438d3 102
switches 0:5c4d7b2438d3 103 int semihost_rename(const char *old_name, const char *new_name) {
switches 0:5c4d7b2438d3 104 uint32_t args[4];
switches 0:5c4d7b2438d3 105 args[0] = (uint32_t)old_name;
switches 0:5c4d7b2438d3 106 args[1] = (uint32_t)strlen(old_name);
switches 0:5c4d7b2438d3 107 args[0] = (uint32_t)new_name;
switches 0:5c4d7b2438d3 108 args[1] = (uint32_t)strlen(new_name);
switches 0:5c4d7b2438d3 109 return __semihost(SYS_RENAME, args);
switches 0:5c4d7b2438d3 110 }
switches 0:5c4d7b2438d3 111 #endif
switches 0:5c4d7b2438d3 112
switches 0:5c4d7b2438d3 113 int semihost_exit(void) {
switches 0:5c4d7b2438d3 114 uint32_t args[4];
switches 0:5c4d7b2438d3 115 return __semihost(SYS_EXIT, args);
switches 0:5c4d7b2438d3 116 }
switches 0:5c4d7b2438d3 117
switches 0:5c4d7b2438d3 118 int semihost_uid(char *uid) {
switches 0:5c4d7b2438d3 119 uint32_t args[2];
switches 0:5c4d7b2438d3 120 args[0] = (uint32_t)uid;
switches 0:5c4d7b2438d3 121 args[1] = DEVICE_ID_LENGTH + 1;
switches 0:5c4d7b2438d3 122 return __semihost(USR_UID, &args);
switches 0:5c4d7b2438d3 123 }
switches 0:5c4d7b2438d3 124
switches 0:5c4d7b2438d3 125 int semihost_reset(void) {
switches 0:5c4d7b2438d3 126 // Does not normally return, however if used with older firmware versions
switches 0:5c4d7b2438d3 127 // that do not support this call it will return -1.
switches 0:5c4d7b2438d3 128 return __semihost(USR_RESET, NULL);
switches 0:5c4d7b2438d3 129 }
switches 0:5c4d7b2438d3 130
switches 0:5c4d7b2438d3 131 int semihost_vbus(void) {
switches 0:5c4d7b2438d3 132 return __semihost(USR_VBUS, NULL);
switches 0:5c4d7b2438d3 133 }
switches 0:5c4d7b2438d3 134
switches 0:5c4d7b2438d3 135 int semihost_powerdown(void) {
switches 0:5c4d7b2438d3 136 return __semihost(USR_POWERDOWN, NULL);
switches 0:5c4d7b2438d3 137 }
switches 0:5c4d7b2438d3 138
switches 0:5c4d7b2438d3 139 #if DEVICE_DEBUG_AWARENESS
switches 0:5c4d7b2438d3 140
switches 0:5c4d7b2438d3 141 int semihost_connected(void) {
switches 0:5c4d7b2438d3 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
switches 0:5c4d7b2438d3 143 }
switches 0:5c4d7b2438d3 144
switches 0:5c4d7b2438d3 145 #else
switches 0:5c4d7b2438d3 146 // These processors cannot know if the interface is connect, assume so:
switches 0:5c4d7b2438d3 147 static int is_debugger_attached = 1;
switches 0:5c4d7b2438d3 148
switches 0:5c4d7b2438d3 149 int semihost_connected(void) {
switches 0:5c4d7b2438d3 150 return is_debugger_attached;
switches 0:5c4d7b2438d3 151 }
switches 0:5c4d7b2438d3 152 #endif
switches 0:5c4d7b2438d3 153
switches 0:5c4d7b2438d3 154 int semihost_disabledebug(void) {
switches 0:5c4d7b2438d3 155 #if !(DEVICE_DEBUG_AWARENESS)
switches 0:5c4d7b2438d3 156 is_debugger_attached = 0;
switches 0:5c4d7b2438d3 157 #endif
switches 0:5c4d7b2438d3 158 return __semihost(USR_DISABLEDEBUG, NULL);
switches 0:5c4d7b2438d3 159 }
switches 0:5c4d7b2438d3 160
switches 0:5c4d7b2438d3 161 #endif
switches 0:5c4d7b2438d3 162