mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
capi/semihost_api.h
- Committer:
- mbed_official
- Date:
- 2012-11-20
- Revision:
- 0:fd0d7bdfcdc2
- Child:
- 2:143cac498751
File content as of revision 0:fd0d7bdfcdc2:
/* mbed Microcontroller Library * Copyright (c) 2006-2012 ARM Limited * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef MBED_SEMIHOST_H #define MBED_SEMIHOST_H #include "device.h" #include "toolchain.h" #ifdef __cplusplus extern "C" { #endif /* __semihost intrinsic This intrinsic inserts an SVC or BKPT instruction into the instruction stream generated by the compiler. It enables you to make semihosting calls from C or C++ that are independent of the target architecture. */ #ifndef __CC_ARM /* Semihost implementation taken from eLua (MIT license): * git://github.com/elua/elua.git/src/semifs.c */ /* SWI numbers for RDI (Angel) monitors */ #ifdef __thumb__ #define AngelSWI 0xAB #else #define AngelSWI 0x123456 #endif /* For Thumb-2 code use the BKPT instruction instead of SWI */ #ifdef __thumb2__ #define AngelSWIInsn "bkpt" #define AngelSWIAsm bkpt #else #define AngelSWIInsn "swi" #define AngelSWIAsm swi #endif inline int __semihost(int reason, const void *arg) { int value; asm volatile ("mov r0, %1; mov r1, %2; " AngelSWIInsn " %a3; mov %0, r0" : "=r" (value) /* Outputs */ : "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */ : "r0", "r1", "r2", "r3", "ip", "lr", "memory", "cc" /* Clobbers r0 and r1, and lr if in supervisor mode */); /* Accordingly to page 13-77 of ARM DUI 0040D other registers can also be clobbered. Some memory positions may also be changed by a system call, so they should not be kept in registers. Note: we are assuming the manual is right and Angel is respecting the APCS. */ return value; } #endif #if DEVICE_LOCALFILESYSTEM FILEHANDLE semihost_open(const char* name, int openmode); int semihost_close (FILEHANDLE fh); int semihost_read (FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode); int semihost_write (FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode); int semihost_ensure(FILEHANDLE fh); long semihost_flen (FILEHANDLE fh); int semihost_seek (FILEHANDLE fh, long position); int semihost_istty (FILEHANDLE fh); int semihost_remove(const char *name); int semihost_rename(const char *old_name, const char *new_name); #endif int semihost_uid(char *uid); int semihost_reset(void); int semihost_vbus(void); int semihost_powerdown(void); int semihost_exit(void); int semihost_connected(void); int semihost_disabledebug(void); #ifdef __cplusplus } #endif #endif