zhang boie / mbed-dev-f30333

platform/mbed_semihost_api.c@0:bdf663c61a82, 2022-06-14 (annotated)

Committer:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4
Date:
Tue Jun 14 09:21:18 2022 +0000
Revision:
0:bdf663c61a82
lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 1 /* mbed Microcontroller Library
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 2 * Copyright (c) 2006-2013 ARM Limited
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 3 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 4 * Licensed under the Apache License, Version 2.0 (the "License");
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 5 * you may not use this file except in compliance with the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 6 * You may obtain a copy of the License at
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 7 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 8 * http://www.apache.org/licenses/LICENSE-2.0
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 9 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 10 * Unless required by applicable law or agreed to in writing, software
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 11 * distributed under the License is distributed on an "AS IS" BASIS,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 13 * See the License for the specific language governing permissions and
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 14 * limitations under the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 15 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 16 #include "cmsis.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 17 #include "platform/mbed_semihost_api.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 18
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 19 #include <stdint.h>
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 20 #include <string.h>
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 21
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 22 #if DEVICE_SEMIHOST
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 23
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 24 // ARM Semihosting Commands
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 25 #define SYS_OPEN (0x1)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 26 #define SYS_CLOSE (0x2)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 27 #define SYS_WRITE (0x5)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 28 #define SYS_READ (0x6)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 29 #define SYS_ISTTY (0x9)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 30 #define SYS_SEEK (0xa)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 31 #define SYS_ENSURE (0xb)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 32 #define SYS_FLEN (0xc)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 33 #define SYS_REMOVE (0xe)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 34 #define SYS_RENAME (0xf)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 35 #define SYS_EXIT (0x18)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 36
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 37 // mbed Semihosting Commands
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 45
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 46 #if DEVICE_LOCALFILESYSTEM
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 47 FILEHANDLE semihost_open(const char* name, int openmode) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 48 uint32_t args[3];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 49 args[0] = (uint32_t)name;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 50 args[1] = (uint32_t)openmode;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 51 args[2] = (uint32_t)strlen(name);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 52 return __semihost(SYS_OPEN, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 53 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 54
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 55 int semihost_close(FILEHANDLE fh) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 56 return __semihost(SYS_CLOSE, &fh);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 57 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 58
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 60 if (length == 0) return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 61
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 62 uint32_t args[3];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 63 args[0] = (uint32_t)fh;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 64 args[1] = (uint32_t)buffer;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 65 args[2] = (uint32_t)length;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 66 return __semihost(SYS_WRITE, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 67 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 68
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 70 uint32_t args[3];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 71 args[0] = (uint32_t)fh;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 72 args[1] = (uint32_t)buffer;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 73 args[2] = (uint32_t)length;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 74 return __semihost(SYS_READ, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 75 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 76
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 77 int semihost_istty(FILEHANDLE fh) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 78 return __semihost(SYS_ISTTY, &fh);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 79 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 80
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 81 int semihost_seek(FILEHANDLE fh, long position) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 82 uint32_t args[2];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 83 args[0] = (uint32_t)fh;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 84 args[1] = (uint32_t)position;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 85 return __semihost(SYS_SEEK, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 86 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 87
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 88 int semihost_ensure(FILEHANDLE fh) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 89 return __semihost(SYS_ENSURE, &fh);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 90 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 91
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 92 long semihost_flen(FILEHANDLE fh) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 93 return __semihost(SYS_FLEN, &fh);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 94 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 95
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 96 int semihost_remove(const char *name) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 97 uint32_t args[2];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 98 args[0] = (uint32_t)name;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 99 args[1] = (uint32_t)strlen(name);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 100 return __semihost(SYS_REMOVE, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 101 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 102
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 103 int semihost_rename(const char *old_name, const char *new_name) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 104 uint32_t args[4];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 105 args[0] = (uint32_t)old_name;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 106 args[1] = (uint32_t)strlen(old_name);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 107 args[0] = (uint32_t)new_name;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 108 args[1] = (uint32_t)strlen(new_name);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 109 return __semihost(SYS_RENAME, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 110 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 111 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 112
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 113 int semihost_exit(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 114 uint32_t args[4];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 115 return __semihost(SYS_EXIT, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 116 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 117
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 118 int semihost_uid(char *uid) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 119 uint32_t args[2];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 120 args[0] = (uint32_t)uid;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 121 args[1] = DEVICE_ID_LENGTH + 1;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 122 return __semihost(USR_UID, &args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 123 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 124
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 125 int semihost_reset(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 126 // Does not normally return, however if used with older firmware versions
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 127 // that do not support this call it will return -1.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 128 return __semihost(USR_RESET, NULL);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 129 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 130
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 131 int semihost_vbus(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 132 return __semihost(USR_VBUS, NULL);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 133 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 134
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 135 int semihost_powerdown(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 136 return __semihost(USR_POWERDOWN, NULL);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 137 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 138
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 139 #if DEVICE_DEBUG_AWARENESS
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 140
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 141 int semihost_connected(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 143 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 144
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 145 #else
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 146 // These processors cannot know if the interface is connect, assume so:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 147 static int is_debugger_attached = 1;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 148
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 149 int semihost_connected(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 150 return is_debugger_attached;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 151 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 152 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 153
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 154 int semihost_disabledebug(void) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 155 uint32_t args[1];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 156 #if !(DEVICE_DEBUG_AWARENESS)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 157 is_debugger_attached = 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 158 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 159 return __semihost(USR_DISABLEDEBUG, &args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 160 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 161
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 162 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 163
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 164