Elijah Stanger-Jones / mbed-dev-f303

test

platform/mbed_semihost_api.c@2:4364577b5ad8, 2020-11-09 (annotated)

Committer:
elijahsj
Date:
Mon Nov 09 00:33:19 2020 -0500
Revision:
2:4364577b5ad8
Parent:
1:8a094db1347f 
copied mbed library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elijahsj 1:8a094db1347f 1 /* mbed Microcontroller Library
elijahsj 1:8a094db1347f 2 * Copyright (c) 2006-2013 ARM Limited
elijahsj 1:8a094db1347f 3 *
elijahsj 1:8a094db1347f 4 * Licensed under the Apache License, Version 2.0 (the "License");
elijahsj 1:8a094db1347f 5 * you may not use this file except in compliance with the License.
elijahsj 1:8a094db1347f 6 * You may obtain a copy of the License at
elijahsj 1:8a094db1347f 7 *
elijahsj 1:8a094db1347f 8 * http://www.apache.org/licenses/LICENSE-2.0
elijahsj 1:8a094db1347f 9 *
elijahsj 1:8a094db1347f 10 * Unless required by applicable law or agreed to in writing, software
elijahsj 1:8a094db1347f 11 * distributed under the License is distributed on an "AS IS" BASIS,
elijahsj 1:8a094db1347f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elijahsj 1:8a094db1347f 13 * See the License for the specific language governing permissions and
elijahsj 1:8a094db1347f 14 * limitations under the License.
elijahsj 1:8a094db1347f 15 */
elijahsj 1:8a094db1347f 16 #include "cmsis.h"
elijahsj 1:8a094db1347f 17 #include "platform/mbed_semihost_api.h"
elijahsj 1:8a094db1347f 18
elijahsj 1:8a094db1347f 19 #include <stdint.h>
elijahsj 1:8a094db1347f 20 #include <string.h>
elijahsj 1:8a094db1347f 21
elijahsj 1:8a094db1347f 22 #if DEVICE_SEMIHOST
elijahsj 1:8a094db1347f 23
elijahsj 1:8a094db1347f 24 // ARM Semihosting Commands
elijahsj 1:8a094db1347f 25 #define SYS_OPEN (0x1)
elijahsj 1:8a094db1347f 26 #define SYS_CLOSE (0x2)
elijahsj 1:8a094db1347f 27 #define SYS_WRITE (0x5)
elijahsj 1:8a094db1347f 28 #define SYS_READ (0x6)
elijahsj 1:8a094db1347f 29 #define SYS_ISTTY (0x9)
elijahsj 1:8a094db1347f 30 #define SYS_SEEK (0xa)
elijahsj 1:8a094db1347f 31 #define SYS_ENSURE (0xb)
elijahsj 1:8a094db1347f 32 #define SYS_FLEN (0xc)
elijahsj 1:8a094db1347f 33 #define SYS_REMOVE (0xe)
elijahsj 1:8a094db1347f 34 #define SYS_RENAME (0xf)
elijahsj 1:8a094db1347f 35 #define SYS_EXIT (0x18)
elijahsj 1:8a094db1347f 36
elijahsj 1:8a094db1347f 37 // mbed Semihosting Commands
elijahsj 1:8a094db1347f 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
elijahsj 1:8a094db1347f 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
elijahsj 1:8a094db1347f 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
elijahsj 1:8a094db1347f 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
elijahsj 1:8a094db1347f 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
elijahsj 1:8a094db1347f 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
elijahsj 1:8a094db1347f 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
elijahsj 1:8a094db1347f 45
elijahsj 1:8a094db1347f 46 #if DEVICE_LOCALFILESYSTEM
elijahsj 1:8a094db1347f 47 FILEHANDLE semihost_open(const char* name, int openmode) {
elijahsj 1:8a094db1347f 48 uint32_t args[3];
elijahsj 1:8a094db1347f 49 args[0] = (uint32_t)name;
elijahsj 1:8a094db1347f 50 args[1] = (uint32_t)openmode;
elijahsj 1:8a094db1347f 51 args[2] = (uint32_t)strlen(name);
elijahsj 1:8a094db1347f 52 return __semihost(SYS_OPEN, args);
elijahsj 1:8a094db1347f 53 }
elijahsj 1:8a094db1347f 54
elijahsj 1:8a094db1347f 55 int semihost_close(FILEHANDLE fh) {
elijahsj 1:8a094db1347f 56 return __semihost(SYS_CLOSE, &fh);
elijahsj 1:8a094db1347f 57 }
elijahsj 1:8a094db1347f 58
elijahsj 1:8a094db1347f 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
elijahsj 1:8a094db1347f 60 if (length == 0) return 0;
elijahsj 1:8a094db1347f 61
elijahsj 1:8a094db1347f 62 uint32_t args[3];
elijahsj 1:8a094db1347f 63 args[0] = (uint32_t)fh;
elijahsj 1:8a094db1347f 64 args[1] = (uint32_t)buffer;
elijahsj 1:8a094db1347f 65 args[2] = (uint32_t)length;
elijahsj 1:8a094db1347f 66 return __semihost(SYS_WRITE, args);
elijahsj 1:8a094db1347f 67 }
elijahsj 1:8a094db1347f 68
elijahsj 1:8a094db1347f 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
elijahsj 1:8a094db1347f 70 uint32_t args[3];
elijahsj 1:8a094db1347f 71 args[0] = (uint32_t)fh;
elijahsj 1:8a094db1347f 72 args[1] = (uint32_t)buffer;
elijahsj 1:8a094db1347f 73 args[2] = (uint32_t)length;
elijahsj 1:8a094db1347f 74 return __semihost(SYS_READ, args);
elijahsj 1:8a094db1347f 75 }
elijahsj 1:8a094db1347f 76
elijahsj 1:8a094db1347f 77 int semihost_istty(FILEHANDLE fh) {
elijahsj 1:8a094db1347f 78 return __semihost(SYS_ISTTY, &fh);
elijahsj 1:8a094db1347f 79 }
elijahsj 1:8a094db1347f 80
elijahsj 1:8a094db1347f 81 int semihost_seek(FILEHANDLE fh, long position) {
elijahsj 1:8a094db1347f 82 uint32_t args[2];
elijahsj 1:8a094db1347f 83 args[0] = (uint32_t)fh;
elijahsj 1:8a094db1347f 84 args[1] = (uint32_t)position;
elijahsj 1:8a094db1347f 85 return __semihost(SYS_SEEK, args);
elijahsj 1:8a094db1347f 86 }
elijahsj 1:8a094db1347f 87
elijahsj 1:8a094db1347f 88 int semihost_ensure(FILEHANDLE fh) {
elijahsj 1:8a094db1347f 89 return __semihost(SYS_ENSURE, &fh);
elijahsj 1:8a094db1347f 90 }
elijahsj 1:8a094db1347f 91
elijahsj 1:8a094db1347f 92 long semihost_flen(FILEHANDLE fh) {
elijahsj 1:8a094db1347f 93 return __semihost(SYS_FLEN, &fh);
elijahsj 1:8a094db1347f 94 }
elijahsj 1:8a094db1347f 95
elijahsj 1:8a094db1347f 96 int semihost_remove(const char *name) {
elijahsj 1:8a094db1347f 97 uint32_t args[2];
elijahsj 1:8a094db1347f 98 args[0] = (uint32_t)name;
elijahsj 1:8a094db1347f 99 args[1] = (uint32_t)strlen(name);
elijahsj 1:8a094db1347f 100 return __semihost(SYS_REMOVE, args);
elijahsj 1:8a094db1347f 101 }
elijahsj 1:8a094db1347f 102
elijahsj 1:8a094db1347f 103 int semihost_rename(const char *old_name, const char *new_name) {
elijahsj 1:8a094db1347f 104 uint32_t args[4];
elijahsj 1:8a094db1347f 105 args[0] = (uint32_t)old_name;
elijahsj 1:8a094db1347f 106 args[1] = (uint32_t)strlen(old_name);
elijahsj 1:8a094db1347f 107 args[0] = (uint32_t)new_name;
elijahsj 1:8a094db1347f 108 args[1] = (uint32_t)strlen(new_name);
elijahsj 1:8a094db1347f 109 return __semihost(SYS_RENAME, args);
elijahsj 1:8a094db1347f 110 }
elijahsj 1:8a094db1347f 111 #endif
elijahsj 1:8a094db1347f 112
elijahsj 1:8a094db1347f 113 int semihost_exit(void) {
elijahsj 1:8a094db1347f 114 uint32_t args[4];
elijahsj 1:8a094db1347f 115 return __semihost(SYS_EXIT, args);
elijahsj 1:8a094db1347f 116 }
elijahsj 1:8a094db1347f 117
elijahsj 1:8a094db1347f 118 int semihost_uid(char *uid) {
elijahsj 1:8a094db1347f 119 uint32_t args[2];
elijahsj 1:8a094db1347f 120 args[0] = (uint32_t)uid;
elijahsj 1:8a094db1347f 121 args[1] = DEVICE_ID_LENGTH + 1;
elijahsj 1:8a094db1347f 122 return __semihost(USR_UID, &args);
elijahsj 1:8a094db1347f 123 }
elijahsj 1:8a094db1347f 124
elijahsj 1:8a094db1347f 125 int semihost_reset(void) {
elijahsj 1:8a094db1347f 126 // Does not normally return, however if used with older firmware versions
elijahsj 1:8a094db1347f 127 // that do not support this call it will return -1.
elijahsj 1:8a094db1347f 128 return __semihost(USR_RESET, NULL);
elijahsj 1:8a094db1347f 129 }
elijahsj 1:8a094db1347f 130
elijahsj 1:8a094db1347f 131 int semihost_vbus(void) {
elijahsj 1:8a094db1347f 132 return __semihost(USR_VBUS, NULL);
elijahsj 1:8a094db1347f 133 }
elijahsj 1:8a094db1347f 134
elijahsj 1:8a094db1347f 135 int semihost_powerdown(void) {
elijahsj 1:8a094db1347f 136 return __semihost(USR_POWERDOWN, NULL);
elijahsj 1:8a094db1347f 137 }
elijahsj 1:8a094db1347f 138
elijahsj 1:8a094db1347f 139 #if DEVICE_DEBUG_AWARENESS
elijahsj 1:8a094db1347f 140
elijahsj 1:8a094db1347f 141 int semihost_connected(void) {
elijahsj 1:8a094db1347f 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
elijahsj 1:8a094db1347f 143 }
elijahsj 1:8a094db1347f 144
elijahsj 1:8a094db1347f 145 #else
elijahsj 1:8a094db1347f 146 // These processors cannot know if the interface is connect, assume so:
elijahsj 1:8a094db1347f 147 static int is_debugger_attached = 1;
elijahsj 1:8a094db1347f 148
elijahsj 1:8a094db1347f 149 int semihost_connected(void) {
elijahsj 1:8a094db1347f 150 return is_debugger_attached;
elijahsj 1:8a094db1347f 151 }
elijahsj 1:8a094db1347f 152 #endif
elijahsj 1:8a094db1347f 153
elijahsj 1:8a094db1347f 154 int semihost_disabledebug(void) {
elijahsj 1:8a094db1347f 155 uint32_t args[1];
elijahsj 1:8a094db1347f 156 #if !(DEVICE_DEBUG_AWARENESS)
elijahsj 1:8a094db1347f 157 is_debugger_attached = 0;
elijahsj 1:8a094db1347f 158 #endif
elijahsj 1:8a094db1347f 159 return __semihost(USR_DISABLEDEBUG, &args);
elijahsj 1:8a094db1347f 160 }
elijahsj 1:8a094db1347f 161
elijahsj 1:8a094db1347f 162 #endif
elijahsj 1:8a094db1347f 163