Gan likun / mbed-dev

00

platform/mbed_semihost_api.c@0:13413ea9a877, 2022-06-12 (annotated)

Committer:
ganlikun
Date:
Sun Jun 12 14:02:44 2022 +0000
Revision:
0:13413ea9a877
00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:13413ea9a877 1 /* mbed Microcontroller Library
ganlikun 0:13413ea9a877 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:13413ea9a877 3 *
ganlikun 0:13413ea9a877 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:13413ea9a877 5 * you may not use this file except in compliance with the License.
ganlikun 0:13413ea9a877 6 * You may obtain a copy of the License at
ganlikun 0:13413ea9a877 7 *
ganlikun 0:13413ea9a877 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:13413ea9a877 9 *
ganlikun 0:13413ea9a877 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:13413ea9a877 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:13413ea9a877 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:13413ea9a877 13 * See the License for the specific language governing permissions and
ganlikun 0:13413ea9a877 14 * limitations under the License.
ganlikun 0:13413ea9a877 15 */
ganlikun 0:13413ea9a877 16 #include "cmsis.h"
ganlikun 0:13413ea9a877 17 #include "platform/mbed_semihost_api.h"
ganlikun 0:13413ea9a877 18
ganlikun 0:13413ea9a877 19 #include <stdint.h>
ganlikun 0:13413ea9a877 20 #include <string.h>
ganlikun 0:13413ea9a877 21
ganlikun 0:13413ea9a877 22 #if DEVICE_SEMIHOST
ganlikun 0:13413ea9a877 23
ganlikun 0:13413ea9a877 24 // ARM Semihosting Commands
ganlikun 0:13413ea9a877 25 #define SYS_OPEN (0x1)
ganlikun 0:13413ea9a877 26 #define SYS_CLOSE (0x2)
ganlikun 0:13413ea9a877 27 #define SYS_WRITE (0x5)
ganlikun 0:13413ea9a877 28 #define SYS_READ (0x6)
ganlikun 0:13413ea9a877 29 #define SYS_ISTTY (0x9)
ganlikun 0:13413ea9a877 30 #define SYS_SEEK (0xa)
ganlikun 0:13413ea9a877 31 #define SYS_ENSURE (0xb)
ganlikun 0:13413ea9a877 32 #define SYS_FLEN (0xc)
ganlikun 0:13413ea9a877 33 #define SYS_REMOVE (0xe)
ganlikun 0:13413ea9a877 34 #define SYS_RENAME (0xf)
ganlikun 0:13413ea9a877 35 #define SYS_EXIT (0x18)
ganlikun 0:13413ea9a877 36
ganlikun 0:13413ea9a877 37 // mbed Semihosting Commands
ganlikun 0:13413ea9a877 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
ganlikun 0:13413ea9a877 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
ganlikun 0:13413ea9a877 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
ganlikun 0:13413ea9a877 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
ganlikun 0:13413ea9a877 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
ganlikun 0:13413ea9a877 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
ganlikun 0:13413ea9a877 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
ganlikun 0:13413ea9a877 45
ganlikun 0:13413ea9a877 46 #if DEVICE_LOCALFILESYSTEM
ganlikun 0:13413ea9a877 47 FILEHANDLE semihost_open(const char* name, int openmode) {
ganlikun 0:13413ea9a877 48 uint32_t args[3];
ganlikun 0:13413ea9a877 49 args[0] = (uint32_t)name;
ganlikun 0:13413ea9a877 50 args[1] = (uint32_t)openmode;
ganlikun 0:13413ea9a877 51 args[2] = (uint32_t)strlen(name);
ganlikun 0:13413ea9a877 52 return __semihost(SYS_OPEN, args);
ganlikun 0:13413ea9a877 53 }
ganlikun 0:13413ea9a877 54
ganlikun 0:13413ea9a877 55 int semihost_close(FILEHANDLE fh) {
ganlikun 0:13413ea9a877 56 return __semihost(SYS_CLOSE, &fh);
ganlikun 0:13413ea9a877 57 }
ganlikun 0:13413ea9a877 58
ganlikun 0:13413ea9a877 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
ganlikun 0:13413ea9a877 60 if (length == 0) return 0;
ganlikun 0:13413ea9a877 61
ganlikun 0:13413ea9a877 62 uint32_t args[3];
ganlikun 0:13413ea9a877 63 args[0] = (uint32_t)fh;
ganlikun 0:13413ea9a877 64 args[1] = (uint32_t)buffer;
ganlikun 0:13413ea9a877 65 args[2] = (uint32_t)length;
ganlikun 0:13413ea9a877 66 return __semihost(SYS_WRITE, args);
ganlikun 0:13413ea9a877 67 }
ganlikun 0:13413ea9a877 68
ganlikun 0:13413ea9a877 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
ganlikun 0:13413ea9a877 70 uint32_t args[3];
ganlikun 0:13413ea9a877 71 args[0] = (uint32_t)fh;
ganlikun 0:13413ea9a877 72 args[1] = (uint32_t)buffer;
ganlikun 0:13413ea9a877 73 args[2] = (uint32_t)length;
ganlikun 0:13413ea9a877 74 return __semihost(SYS_READ, args);
ganlikun 0:13413ea9a877 75 }
ganlikun 0:13413ea9a877 76
ganlikun 0:13413ea9a877 77 int semihost_istty(FILEHANDLE fh) {
ganlikun 0:13413ea9a877 78 return __semihost(SYS_ISTTY, &fh);
ganlikun 0:13413ea9a877 79 }
ganlikun 0:13413ea9a877 80
ganlikun 0:13413ea9a877 81 int semihost_seek(FILEHANDLE fh, long position) {
ganlikun 0:13413ea9a877 82 uint32_t args[2];
ganlikun 0:13413ea9a877 83 args[0] = (uint32_t)fh;
ganlikun 0:13413ea9a877 84 args[1] = (uint32_t)position;
ganlikun 0:13413ea9a877 85 return __semihost(SYS_SEEK, args);
ganlikun 0:13413ea9a877 86 }
ganlikun 0:13413ea9a877 87
ganlikun 0:13413ea9a877 88 int semihost_ensure(FILEHANDLE fh) {
ganlikun 0:13413ea9a877 89 return __semihost(SYS_ENSURE, &fh);
ganlikun 0:13413ea9a877 90 }
ganlikun 0:13413ea9a877 91
ganlikun 0:13413ea9a877 92 long semihost_flen(FILEHANDLE fh) {
ganlikun 0:13413ea9a877 93 return __semihost(SYS_FLEN, &fh);
ganlikun 0:13413ea9a877 94 }
ganlikun 0:13413ea9a877 95
ganlikun 0:13413ea9a877 96 int semihost_remove(const char *name) {
ganlikun 0:13413ea9a877 97 uint32_t args[2];
ganlikun 0:13413ea9a877 98 args[0] = (uint32_t)name;
ganlikun 0:13413ea9a877 99 args[1] = (uint32_t)strlen(name);
ganlikun 0:13413ea9a877 100 return __semihost(SYS_REMOVE, args);
ganlikun 0:13413ea9a877 101 }
ganlikun 0:13413ea9a877 102
ganlikun 0:13413ea9a877 103 int semihost_rename(const char *old_name, const char *new_name) {
ganlikun 0:13413ea9a877 104 uint32_t args[4];
ganlikun 0:13413ea9a877 105 args[0] = (uint32_t)old_name;
ganlikun 0:13413ea9a877 106 args[1] = (uint32_t)strlen(old_name);
ganlikun 0:13413ea9a877 107 args[0] = (uint32_t)new_name;
ganlikun 0:13413ea9a877 108 args[1] = (uint32_t)strlen(new_name);
ganlikun 0:13413ea9a877 109 return __semihost(SYS_RENAME, args);
ganlikun 0:13413ea9a877 110 }
ganlikun 0:13413ea9a877 111 #endif
ganlikun 0:13413ea9a877 112
ganlikun 0:13413ea9a877 113 int semihost_exit(void) {
ganlikun 0:13413ea9a877 114 uint32_t args[4];
ganlikun 0:13413ea9a877 115 return __semihost(SYS_EXIT, args);
ganlikun 0:13413ea9a877 116 }
ganlikun 0:13413ea9a877 117
ganlikun 0:13413ea9a877 118 int semihost_uid(char *uid) {
ganlikun 0:13413ea9a877 119 uint32_t args[2];
ganlikun 0:13413ea9a877 120 args[0] = (uint32_t)uid;
ganlikun 0:13413ea9a877 121 args[1] = DEVICE_ID_LENGTH + 1;
ganlikun 0:13413ea9a877 122 return __semihost(USR_UID, &args);
ganlikun 0:13413ea9a877 123 }
ganlikun 0:13413ea9a877 124
ganlikun 0:13413ea9a877 125 int semihost_reset(void) {
ganlikun 0:13413ea9a877 126 // Does not normally return, however if used with older firmware versions
ganlikun 0:13413ea9a877 127 // that do not support this call it will return -1.
ganlikun 0:13413ea9a877 128 return __semihost(USR_RESET, NULL);
ganlikun 0:13413ea9a877 129 }
ganlikun 0:13413ea9a877 130
ganlikun 0:13413ea9a877 131 int semihost_vbus(void) {
ganlikun 0:13413ea9a877 132 return __semihost(USR_VBUS, NULL);
ganlikun 0:13413ea9a877 133 }
ganlikun 0:13413ea9a877 134
ganlikun 0:13413ea9a877 135 int semihost_powerdown(void) {
ganlikun 0:13413ea9a877 136 return __semihost(USR_POWERDOWN, NULL);
ganlikun 0:13413ea9a877 137 }
ganlikun 0:13413ea9a877 138
ganlikun 0:13413ea9a877 139 #if DEVICE_DEBUG_AWARENESS
ganlikun 0:13413ea9a877 140
ganlikun 0:13413ea9a877 141 int semihost_connected(void) {
ganlikun 0:13413ea9a877 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
ganlikun 0:13413ea9a877 143 }
ganlikun 0:13413ea9a877 144
ganlikun 0:13413ea9a877 145 #else
ganlikun 0:13413ea9a877 146 // These processors cannot know if the interface is connect, assume so:
ganlikun 0:13413ea9a877 147 static int is_debugger_attached = 1;
ganlikun 0:13413ea9a877 148
ganlikun 0:13413ea9a877 149 int semihost_connected(void) {
ganlikun 0:13413ea9a877 150 return is_debugger_attached;
ganlikun 0:13413ea9a877 151 }
ganlikun 0:13413ea9a877 152 #endif
ganlikun 0:13413ea9a877 153
ganlikun 0:13413ea9a877 154 int semihost_disabledebug(void) {
ganlikun 0:13413ea9a877 155 uint32_t args[1];
ganlikun 0:13413ea9a877 156 #if !(DEVICE_DEBUG_AWARENESS)
ganlikun 0:13413ea9a877 157 is_debugger_attached = 0;
ganlikun 0:13413ea9a877 158 #endif
ganlikun 0:13413ea9a877 159 return __semihost(USR_DISABLEDEBUG, &args);
ganlikun 0:13413ea9a877 160 }
ganlikun 0:13413ea9a877 161
ganlikun 0:13413ea9a877 162 #endif
ganlikun 0:13413ea9a877 163
ganlikun 0:13413ea9a877 164