Alessandro Angelino / mbed-hal

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Dependencies:   target-freescale

Fork of mbed-hal by Morpheus

common/semihost_api.c@0:9c59db1fbc9e, 2016-03-23 (annotated)

Committer:
screamer
Date:
Wed Mar 23 21:36:09 2016 +0000
Revision:
0:9c59db1fbc9e
Initial revision

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:9c59db1fbc9e 1 /* mbed Microcontroller Library
screamer 0:9c59db1fbc9e 2 * Copyright (c) 2006-2013 ARM Limited
screamer 0:9c59db1fbc9e 3 *
screamer 0:9c59db1fbc9e 4 * Licensed under the Apache License, Version 2.0 (the "License");
screamer 0:9c59db1fbc9e 5 * you may not use this file except in compliance with the License.
screamer 0:9c59db1fbc9e 6 * You may obtain a copy of the License at
screamer 0:9c59db1fbc9e 7 *
screamer 0:9c59db1fbc9e 8 * http://www.apache.org/licenses/LICENSE-2.0
screamer 0:9c59db1fbc9e 9 *
screamer 0:9c59db1fbc9e 10 * Unless required by applicable law or agreed to in writing, software
screamer 0:9c59db1fbc9e 11 * distributed under the License is distributed on an "AS IS" BASIS,
screamer 0:9c59db1fbc9e 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
screamer 0:9c59db1fbc9e 13 * See the License for the specific language governing permissions and
screamer 0:9c59db1fbc9e 14 * limitations under the License.
screamer 0:9c59db1fbc9e 15 */
screamer 0:9c59db1fbc9e 16 #include "cmsis.h"
screamer 0:9c59db1fbc9e 17 #include "semihost_api.h"
screamer 0:9c59db1fbc9e 18
screamer 0:9c59db1fbc9e 19 #include <stdint.h>
screamer 0:9c59db1fbc9e 20 #include <string.h>
screamer 0:9c59db1fbc9e 21
screamer 0:9c59db1fbc9e 22 #if DEVICE_SEMIHOST
screamer 0:9c59db1fbc9e 23
screamer 0:9c59db1fbc9e 24 // ARM Semihosting Commands
screamer 0:9c59db1fbc9e 25 #define SYS_OPEN (0x1)
screamer 0:9c59db1fbc9e 26 #define SYS_CLOSE (0x2)
screamer 0:9c59db1fbc9e 27 #define SYS_WRITE (0x5)
screamer 0:9c59db1fbc9e 28 #define SYS_READ (0x6)
screamer 0:9c59db1fbc9e 29 #define SYS_ISTTY (0x9)
screamer 0:9c59db1fbc9e 30 #define SYS_SEEK (0xa)
screamer 0:9c59db1fbc9e 31 #define SYS_ENSURE (0xb)
screamer 0:9c59db1fbc9e 32 #define SYS_FLEN (0xc)
screamer 0:9c59db1fbc9e 33 #define SYS_REMOVE (0xe)
screamer 0:9c59db1fbc9e 34 #define SYS_RENAME (0xf)
screamer 0:9c59db1fbc9e 35 #define SYS_EXIT (0x18)
screamer 0:9c59db1fbc9e 36
screamer 0:9c59db1fbc9e 37 // mbed Semihosting Commands
screamer 0:9c59db1fbc9e 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
screamer 0:9c59db1fbc9e 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
screamer 0:9c59db1fbc9e 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
screamer 0:9c59db1fbc9e 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
screamer 0:9c59db1fbc9e 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
screamer 0:9c59db1fbc9e 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
screamer 0:9c59db1fbc9e 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
screamer 0:9c59db1fbc9e 45
screamer 0:9c59db1fbc9e 46 #if DEVICE_LOCALFILESYSTEM
screamer 0:9c59db1fbc9e 47 FILEHANDLE semihost_open(const char* name, int openmode) {
screamer 0:9c59db1fbc9e 48 uint32_t args[3];
screamer 0:9c59db1fbc9e 49 args[0] = (uint32_t)name;
screamer 0:9c59db1fbc9e 50 args[1] = (uint32_t)openmode;
screamer 0:9c59db1fbc9e 51 args[2] = (uint32_t)strlen(name);
screamer 0:9c59db1fbc9e 52 return __semihost(SYS_OPEN, args);
screamer 0:9c59db1fbc9e 53 }
screamer 0:9c59db1fbc9e 54
screamer 0:9c59db1fbc9e 55 int semihost_close(FILEHANDLE fh) {
screamer 0:9c59db1fbc9e 56 return __semihost(SYS_CLOSE, &fh);
screamer 0:9c59db1fbc9e 57 }
screamer 0:9c59db1fbc9e 58
screamer 0:9c59db1fbc9e 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
screamer 0:9c59db1fbc9e 60 if (length == 0) return 0;
screamer 0:9c59db1fbc9e 61
screamer 0:9c59db1fbc9e 62 uint32_t args[3];
screamer 0:9c59db1fbc9e 63 args[0] = (uint32_t)fh;
screamer 0:9c59db1fbc9e 64 args[1] = (uint32_t)buffer;
screamer 0:9c59db1fbc9e 65 args[2] = (uint32_t)length;
screamer 0:9c59db1fbc9e 66 return __semihost(SYS_WRITE, args);
screamer 0:9c59db1fbc9e 67 }
screamer 0:9c59db1fbc9e 68
screamer 0:9c59db1fbc9e 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
screamer 0:9c59db1fbc9e 70 uint32_t args[3];
screamer 0:9c59db1fbc9e 71 args[0] = (uint32_t)fh;
screamer 0:9c59db1fbc9e 72 args[1] = (uint32_t)buffer;
screamer 0:9c59db1fbc9e 73 args[2] = (uint32_t)length;
screamer 0:9c59db1fbc9e 74 return __semihost(SYS_READ, args);
screamer 0:9c59db1fbc9e 75 }
screamer 0:9c59db1fbc9e 76
screamer 0:9c59db1fbc9e 77 int semihost_istty(FILEHANDLE fh) {
screamer 0:9c59db1fbc9e 78 return __semihost(SYS_ISTTY, &fh);
screamer 0:9c59db1fbc9e 79 }
screamer 0:9c59db1fbc9e 80
screamer 0:9c59db1fbc9e 81 int semihost_seek(FILEHANDLE fh, long position) {
screamer 0:9c59db1fbc9e 82 uint32_t args[2];
screamer 0:9c59db1fbc9e 83 args[0] = (uint32_t)fh;
screamer 0:9c59db1fbc9e 84 args[1] = (uint32_t)position;
screamer 0:9c59db1fbc9e 85 return __semihost(SYS_SEEK, args);
screamer 0:9c59db1fbc9e 86 }
screamer 0:9c59db1fbc9e 87
screamer 0:9c59db1fbc9e 88 int semihost_ensure(FILEHANDLE fh) {
screamer 0:9c59db1fbc9e 89 return __semihost(SYS_ENSURE, &fh);
screamer 0:9c59db1fbc9e 90 }
screamer 0:9c59db1fbc9e 91
screamer 0:9c59db1fbc9e 92 long semihost_flen(FILEHANDLE fh) {
screamer 0:9c59db1fbc9e 93 return __semihost(SYS_FLEN, &fh);
screamer 0:9c59db1fbc9e 94 }
screamer 0:9c59db1fbc9e 95
screamer 0:9c59db1fbc9e 96 int semihost_remove(const char *name) {
screamer 0:9c59db1fbc9e 97 uint32_t args[2];
screamer 0:9c59db1fbc9e 98 args[0] = (uint32_t)name;
screamer 0:9c59db1fbc9e 99 args[1] = (uint32_t)strlen(name);
screamer 0:9c59db1fbc9e 100 return __semihost(SYS_REMOVE, args);
screamer 0:9c59db1fbc9e 101 }
screamer 0:9c59db1fbc9e 102
screamer 0:9c59db1fbc9e 103 int semihost_rename(const char *old_name, const char *new_name) {
screamer 0:9c59db1fbc9e 104 uint32_t args[4];
screamer 0:9c59db1fbc9e 105 args[0] = (uint32_t)old_name;
screamer 0:9c59db1fbc9e 106 args[1] = (uint32_t)strlen(old_name);
screamer 0:9c59db1fbc9e 107 args[0] = (uint32_t)new_name;
screamer 0:9c59db1fbc9e 108 args[1] = (uint32_t)strlen(new_name);
screamer 0:9c59db1fbc9e 109 return __semihost(SYS_RENAME, args);
screamer 0:9c59db1fbc9e 110 }
screamer 0:9c59db1fbc9e 111 #endif
screamer 0:9c59db1fbc9e 112
screamer 0:9c59db1fbc9e 113 int semihost_exit(void) {
screamer 0:9c59db1fbc9e 114 uint32_t args[4];
screamer 0:9c59db1fbc9e 115 return __semihost(SYS_EXIT, args);
screamer 0:9c59db1fbc9e 116 }
screamer 0:9c59db1fbc9e 117
screamer 0:9c59db1fbc9e 118 int semihost_uid(char *uid) {
screamer 0:9c59db1fbc9e 119 uint32_t args[2];
screamer 0:9c59db1fbc9e 120 args[0] = (uint32_t)uid;
screamer 0:9c59db1fbc9e 121 args[1] = DEVICE_ID_LENGTH + 1;
screamer 0:9c59db1fbc9e 122 return __semihost(USR_UID, &args);
screamer 0:9c59db1fbc9e 123 }
screamer 0:9c59db1fbc9e 124
screamer 0:9c59db1fbc9e 125 int semihost_reset(void) {
screamer 0:9c59db1fbc9e 126 // Does not normally return, however if used with older firmware versions
screamer 0:9c59db1fbc9e 127 // that do not support this call it will return -1.
screamer 0:9c59db1fbc9e 128 return __semihost(USR_RESET, NULL);
screamer 0:9c59db1fbc9e 129 }
screamer 0:9c59db1fbc9e 130
screamer 0:9c59db1fbc9e 131 int semihost_vbus(void) {
screamer 0:9c59db1fbc9e 132 return __semihost(USR_VBUS, NULL);
screamer 0:9c59db1fbc9e 133 }
screamer 0:9c59db1fbc9e 134
screamer 0:9c59db1fbc9e 135 int semihost_powerdown(void) {
screamer 0:9c59db1fbc9e 136 return __semihost(USR_POWERDOWN, NULL);
screamer 0:9c59db1fbc9e 137 }
screamer 0:9c59db1fbc9e 138
screamer 0:9c59db1fbc9e 139 #if DEVICE_DEBUG_AWARENESS
screamer 0:9c59db1fbc9e 140
screamer 0:9c59db1fbc9e 141 int semihost_connected(void) {
screamer 0:9c59db1fbc9e 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
screamer 0:9c59db1fbc9e 143 }
screamer 0:9c59db1fbc9e 144
screamer 0:9c59db1fbc9e 145 #else
screamer 0:9c59db1fbc9e 146 // These processors cannot know if the interface is connect, assume so:
screamer 0:9c59db1fbc9e 147 static int is_debugger_attached = 1;
screamer 0:9c59db1fbc9e 148
screamer 0:9c59db1fbc9e 149 int semihost_connected(void) {
screamer 0:9c59db1fbc9e 150 return is_debugger_attached;
screamer 0:9c59db1fbc9e 151 }
screamer 0:9c59db1fbc9e 152 #endif
screamer 0:9c59db1fbc9e 153
screamer 0:9c59db1fbc9e 154 int semihost_disabledebug(void) {
screamer 0:9c59db1fbc9e 155 #if !(DEVICE_DEBUG_AWARENESS)
screamer 0:9c59db1fbc9e 156 is_debugger_attached = 0;
screamer 0:9c59db1fbc9e 157 #endif
screamer 0:9c59db1fbc9e 158 return __semihost(USR_DISABLEDEBUG, NULL);
screamer 0:9c59db1fbc9e 159 }
screamer 0:9c59db1fbc9e 160
screamer 0:9c59db1fbc9e 161 #endif
screamer 0:9c59db1fbc9e 162
screamer 0:9c59db1fbc9e 163