Takaaki Numai / mbed-dev

inport from local

Dependents:   Hobbyking_Cheetah_0511

platform/mbed_semihost_api.c@0:85b3fd62ea1a, 2020-03-16 (annotated)

Committer:
NYX
Date:
Mon Mar 16 06:35:48 2020 +0000
Revision:
0:85b3fd62ea1a
reinport to mbed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
NYX 0:85b3fd62ea1a 1 /* mbed Microcontroller Library
NYX 0:85b3fd62ea1a 2 * Copyright (c) 2006-2013 ARM Limited
NYX 0:85b3fd62ea1a 3 *
NYX 0:85b3fd62ea1a 4 * Licensed under the Apache License, Version 2.0 (the "License");
NYX 0:85b3fd62ea1a 5 * you may not use this file except in compliance with the License.
NYX 0:85b3fd62ea1a 6 * You may obtain a copy of the License at
NYX 0:85b3fd62ea1a 7 *
NYX 0:85b3fd62ea1a 8 * http://www.apache.org/licenses/LICENSE-2.0
NYX 0:85b3fd62ea1a 9 *
NYX 0:85b3fd62ea1a 10 * Unless required by applicable law or agreed to in writing, software
NYX 0:85b3fd62ea1a 11 * distributed under the License is distributed on an "AS IS" BASIS,
NYX 0:85b3fd62ea1a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
NYX 0:85b3fd62ea1a 13 * See the License for the specific language governing permissions and
NYX 0:85b3fd62ea1a 14 * limitations under the License.
NYX 0:85b3fd62ea1a 15 */
NYX 0:85b3fd62ea1a 16 #include "cmsis.h"
NYX 0:85b3fd62ea1a 17 #include "platform/mbed_semihost_api.h"
NYX 0:85b3fd62ea1a 18
NYX 0:85b3fd62ea1a 19 #include <stdint.h>
NYX 0:85b3fd62ea1a 20 #include <string.h>
NYX 0:85b3fd62ea1a 21
NYX 0:85b3fd62ea1a 22 #if DEVICE_SEMIHOST
NYX 0:85b3fd62ea1a 23
NYX 0:85b3fd62ea1a 24 // ARM Semihosting Commands
NYX 0:85b3fd62ea1a 25 #define SYS_OPEN (0x1)
NYX 0:85b3fd62ea1a 26 #define SYS_CLOSE (0x2)
NYX 0:85b3fd62ea1a 27 #define SYS_WRITE (0x5)
NYX 0:85b3fd62ea1a 28 #define SYS_READ (0x6)
NYX 0:85b3fd62ea1a 29 #define SYS_ISTTY (0x9)
NYX 0:85b3fd62ea1a 30 #define SYS_SEEK (0xa)
NYX 0:85b3fd62ea1a 31 #define SYS_ENSURE (0xb)
NYX 0:85b3fd62ea1a 32 #define SYS_FLEN (0xc)
NYX 0:85b3fd62ea1a 33 #define SYS_REMOVE (0xe)
NYX 0:85b3fd62ea1a 34 #define SYS_RENAME (0xf)
NYX 0:85b3fd62ea1a 35 #define SYS_EXIT (0x18)
NYX 0:85b3fd62ea1a 36
NYX 0:85b3fd62ea1a 37 // mbed Semihosting Commands
NYX 0:85b3fd62ea1a 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
NYX 0:85b3fd62ea1a 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
NYX 0:85b3fd62ea1a 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
NYX 0:85b3fd62ea1a 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
NYX 0:85b3fd62ea1a 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
NYX 0:85b3fd62ea1a 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
NYX 0:85b3fd62ea1a 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
NYX 0:85b3fd62ea1a 45
NYX 0:85b3fd62ea1a 46 #if DEVICE_LOCALFILESYSTEM
NYX 0:85b3fd62ea1a 47 FILEHANDLE semihost_open(const char* name, int openmode) {
NYX 0:85b3fd62ea1a 48 uint32_t args[3];
NYX 0:85b3fd62ea1a 49 args[0] = (uint32_t)name;
NYX 0:85b3fd62ea1a 50 args[1] = (uint32_t)openmode;
NYX 0:85b3fd62ea1a 51 args[2] = (uint32_t)strlen(name);
NYX 0:85b3fd62ea1a 52 return __semihost(SYS_OPEN, args);
NYX 0:85b3fd62ea1a 53 }
NYX 0:85b3fd62ea1a 54
NYX 0:85b3fd62ea1a 55 int semihost_close(FILEHANDLE fh) {
NYX 0:85b3fd62ea1a 56 return __semihost(SYS_CLOSE, &fh);
NYX 0:85b3fd62ea1a 57 }
NYX 0:85b3fd62ea1a 58
NYX 0:85b3fd62ea1a 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
NYX 0:85b3fd62ea1a 60 if (length == 0) return 0;
NYX 0:85b3fd62ea1a 61
NYX 0:85b3fd62ea1a 62 uint32_t args[3];
NYX 0:85b3fd62ea1a 63 args[0] = (uint32_t)fh;
NYX 0:85b3fd62ea1a 64 args[1] = (uint32_t)buffer;
NYX 0:85b3fd62ea1a 65 args[2] = (uint32_t)length;
NYX 0:85b3fd62ea1a 66 return __semihost(SYS_WRITE, args);
NYX 0:85b3fd62ea1a 67 }
NYX 0:85b3fd62ea1a 68
NYX 0:85b3fd62ea1a 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
NYX 0:85b3fd62ea1a 70 uint32_t args[3];
NYX 0:85b3fd62ea1a 71 args[0] = (uint32_t)fh;
NYX 0:85b3fd62ea1a 72 args[1] = (uint32_t)buffer;
NYX 0:85b3fd62ea1a 73 args[2] = (uint32_t)length;
NYX 0:85b3fd62ea1a 74 return __semihost(SYS_READ, args);
NYX 0:85b3fd62ea1a 75 }
NYX 0:85b3fd62ea1a 76
NYX 0:85b3fd62ea1a 77 int semihost_istty(FILEHANDLE fh) {
NYX 0:85b3fd62ea1a 78 return __semihost(SYS_ISTTY, &fh);
NYX 0:85b3fd62ea1a 79 }
NYX 0:85b3fd62ea1a 80
NYX 0:85b3fd62ea1a 81 int semihost_seek(FILEHANDLE fh, long position) {
NYX 0:85b3fd62ea1a 82 uint32_t args[2];
NYX 0:85b3fd62ea1a 83 args[0] = (uint32_t)fh;
NYX 0:85b3fd62ea1a 84 args[1] = (uint32_t)position;
NYX 0:85b3fd62ea1a 85 return __semihost(SYS_SEEK, args);
NYX 0:85b3fd62ea1a 86 }
NYX 0:85b3fd62ea1a 87
NYX 0:85b3fd62ea1a 88 int semihost_ensure(FILEHANDLE fh) {
NYX 0:85b3fd62ea1a 89 return __semihost(SYS_ENSURE, &fh);
NYX 0:85b3fd62ea1a 90 }
NYX 0:85b3fd62ea1a 91
NYX 0:85b3fd62ea1a 92 long semihost_flen(FILEHANDLE fh) {
NYX 0:85b3fd62ea1a 93 return __semihost(SYS_FLEN, &fh);
NYX 0:85b3fd62ea1a 94 }
NYX 0:85b3fd62ea1a 95
NYX 0:85b3fd62ea1a 96 int semihost_remove(const char *name) {
NYX 0:85b3fd62ea1a 97 uint32_t args[2];
NYX 0:85b3fd62ea1a 98 args[0] = (uint32_t)name;
NYX 0:85b3fd62ea1a 99 args[1] = (uint32_t)strlen(name);
NYX 0:85b3fd62ea1a 100 return __semihost(SYS_REMOVE, args);
NYX 0:85b3fd62ea1a 101 }
NYX 0:85b3fd62ea1a 102
NYX 0:85b3fd62ea1a 103 int semihost_rename(const char *old_name, const char *new_name) {
NYX 0:85b3fd62ea1a 104 uint32_t args[4];
NYX 0:85b3fd62ea1a 105 args[0] = (uint32_t)old_name;
NYX 0:85b3fd62ea1a 106 args[1] = (uint32_t)strlen(old_name);
NYX 0:85b3fd62ea1a 107 args[0] = (uint32_t)new_name;
NYX 0:85b3fd62ea1a 108 args[1] = (uint32_t)strlen(new_name);
NYX 0:85b3fd62ea1a 109 return __semihost(SYS_RENAME, args);
NYX 0:85b3fd62ea1a 110 }
NYX 0:85b3fd62ea1a 111 #endif
NYX 0:85b3fd62ea1a 112
NYX 0:85b3fd62ea1a 113 int semihost_exit(void) {
NYX 0:85b3fd62ea1a 114 uint32_t args[4];
NYX 0:85b3fd62ea1a 115 return __semihost(SYS_EXIT, args);
NYX 0:85b3fd62ea1a 116 }
NYX 0:85b3fd62ea1a 117
NYX 0:85b3fd62ea1a 118 int semihost_uid(char *uid) {
NYX 0:85b3fd62ea1a 119 uint32_t args[2];
NYX 0:85b3fd62ea1a 120 args[0] = (uint32_t)uid;
NYX 0:85b3fd62ea1a 121 args[1] = DEVICE_ID_LENGTH + 1;
NYX 0:85b3fd62ea1a 122 return __semihost(USR_UID, &args);
NYX 0:85b3fd62ea1a 123 }
NYX 0:85b3fd62ea1a 124
NYX 0:85b3fd62ea1a 125 int semihost_reset(void) {
NYX 0:85b3fd62ea1a 126 // Does not normally return, however if used with older firmware versions
NYX 0:85b3fd62ea1a 127 // that do not support this call it will return -1.
NYX 0:85b3fd62ea1a 128 return __semihost(USR_RESET, NULL);
NYX 0:85b3fd62ea1a 129 }
NYX 0:85b3fd62ea1a 130
NYX 0:85b3fd62ea1a 131 int semihost_vbus(void) {
NYX 0:85b3fd62ea1a 132 return __semihost(USR_VBUS, NULL);
NYX 0:85b3fd62ea1a 133 }
NYX 0:85b3fd62ea1a 134
NYX 0:85b3fd62ea1a 135 int semihost_powerdown(void) {
NYX 0:85b3fd62ea1a 136 return __semihost(USR_POWERDOWN, NULL);
NYX 0:85b3fd62ea1a 137 }
NYX 0:85b3fd62ea1a 138
NYX 0:85b3fd62ea1a 139 #if DEVICE_DEBUG_AWARENESS
NYX 0:85b3fd62ea1a 140
NYX 0:85b3fd62ea1a 141 int semihost_connected(void) {
NYX 0:85b3fd62ea1a 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
NYX 0:85b3fd62ea1a 143 }
NYX 0:85b3fd62ea1a 144
NYX 0:85b3fd62ea1a 145 #else
NYX 0:85b3fd62ea1a 146 // These processors cannot know if the interface is connect, assume so:
NYX 0:85b3fd62ea1a 147 static int is_debugger_attached = 1;
NYX 0:85b3fd62ea1a 148
NYX 0:85b3fd62ea1a 149 int semihost_connected(void) {
NYX 0:85b3fd62ea1a 150 return is_debugger_attached;
NYX 0:85b3fd62ea1a 151 }
NYX 0:85b3fd62ea1a 152 #endif
NYX 0:85b3fd62ea1a 153
NYX 0:85b3fd62ea1a 154 int semihost_disabledebug(void) {
NYX 0:85b3fd62ea1a 155 uint32_t args[1];
NYX 0:85b3fd62ea1a 156 #if !(DEVICE_DEBUG_AWARENESS)
NYX 0:85b3fd62ea1a 157 is_debugger_attached = 0;
NYX 0:85b3fd62ea1a 158 #endif
NYX 0:85b3fd62ea1a 159 return __semihost(USR_DISABLEDEBUG, &args);
NYX 0:85b3fd62ea1a 160 }
NYX 0:85b3fd62ea1a 161
NYX 0:85b3fd62ea1a 162 #endif
NYX 0:85b3fd62ea1a 163