Emilio Monti / mbed-KL25Z

mbed libraries for KL25Z

Dependents:   FRDM_RGBLED

semihost_api.h@8:c14af7958ef5, 2012-11-09 (annotated)

Committer:
emilmont
Date:
Fri Nov 09 11:33:53 2012 +0000
Revision:
8:c14af7958ef5
Child:
9:663789d7729f
SPI driver; ADC driver; DAC driver; microlib support; general bugfixing

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 8:c14af7958ef5 1 /* mbed Microcontroller Library - semihost_api
emilmont 8:c14af7958ef5 2 * Copyright (c) 2006-2009 ARM Limited. All rights reserved.
emilmont 8:c14af7958ef5 3 */
emilmont 8:c14af7958ef5 4 #ifndef MBED_SEMIHOST_H
emilmont 8:c14af7958ef5 5 #define MBED_SEMIHOST_H
emilmont 8:c14af7958ef5 6
emilmont 8:c14af7958ef5 7 #include "device.h"
emilmont 8:c14af7958ef5 8 #include "toolchain.h"
emilmont 8:c14af7958ef5 9
emilmont 8:c14af7958ef5 10 #ifdef __cplusplus
emilmont 8:c14af7958ef5 11 extern "C" {
emilmont 8:c14af7958ef5 12 #endif
emilmont 8:c14af7958ef5 13
emilmont 8:c14af7958ef5 14 /* __semihost intrinsic
emilmont 8:c14af7958ef5 15 This intrinsic inserts an SVC or BKPT instruction into the instruction stream
emilmont 8:c14af7958ef5 16 generated by the compiler. It enables you to make semihosting calls from C or
emilmont 8:c14af7958ef5 17 C++ that are independent of the target architecture.
emilmont 8:c14af7958ef5 18 */
emilmont 8:c14af7958ef5 19 #ifndef __CC_ARM
emilmont 8:c14af7958ef5 20 /* Semihost implementation taken from:
emilmont 8:c14af7958ef5 21 * git://github.com/elua/elua.git/src/semifs.c
emilmont 8:c14af7958ef5 22 */
emilmont 8:c14af7958ef5 23
emilmont 8:c14af7958ef5 24 /* SWI numbers for RDI (Angel) monitors */
emilmont 8:c14af7958ef5 25 #ifdef __thumb__
emilmont 8:c14af7958ef5 26 #define AngelSWI 0xAB
emilmont 8:c14af7958ef5 27 #else
emilmont 8:c14af7958ef5 28 #define AngelSWI 0x123456
emilmont 8:c14af7958ef5 29 #endif
emilmont 8:c14af7958ef5 30 /* For Thumb-2 code use the BKPT instruction instead of SWI */
emilmont 8:c14af7958ef5 31 #ifdef __thumb2__
emilmont 8:c14af7958ef5 32 #define AngelSWIInsn "bkpt"
emilmont 8:c14af7958ef5 33 #define AngelSWIAsm bkpt
emilmont 8:c14af7958ef5 34 #else
emilmont 8:c14af7958ef5 35 #define AngelSWIInsn "swi"
emilmont 8:c14af7958ef5 36 #define AngelSWIAsm swi
emilmont 8:c14af7958ef5 37 #endif
emilmont 8:c14af7958ef5 38
emilmont 8:c14af7958ef5 39 inline int __semihost(int reason, const void *arg) {
emilmont 8:c14af7958ef5 40 int value;
emilmont 8:c14af7958ef5 41 asm volatile ("mov r0, %1; mov r1, %2; " AngelSWIInsn " %a3; mov %0, r0"
emilmont 8:c14af7958ef5 42 : "=r" (value) /* Outputs */
emilmont 8:c14af7958ef5 43 : "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */
emilmont 8:c14af7958ef5 44 : "r0", "r1", "r2", "r3", "ip", "lr", "memory", "cc"
emilmont 8:c14af7958ef5 45 /* Clobbers r0 and r1, and lr if in supervisor mode */);
emilmont 8:c14af7958ef5 46 /* Accordingly to page 13-77 of ARM DUI 0040D other registers
emilmont 8:c14af7958ef5 47 can also be clobbered. Some memory positions may also be
emilmont 8:c14af7958ef5 48 changed by a system call, so they should not be kept in
emilmont 8:c14af7958ef5 49 registers. Note: we are assuming the manual is right and
emilmont 8:c14af7958ef5 50 Angel is respecting the APCS. */
emilmont 8:c14af7958ef5 51
emilmont 8:c14af7958ef5 52 return value;
emilmont 8:c14af7958ef5 53 }
emilmont 8:c14af7958ef5 54
emilmont 8:c14af7958ef5 55 #endif
emilmont 8:c14af7958ef5 56
emilmont 8:c14af7958ef5 57 #if DEVICE_LOCALFILESYSTEM
emilmont 8:c14af7958ef5 58 FILEHANDLE semihost_open(const char* name, int openmode);
emilmont 8:c14af7958ef5 59 int semihost_close(FILEHANDLE fh);
emilmont 8:c14af7958ef5 60 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode);
emilmont 8:c14af7958ef5 61 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode);
emilmont 8:c14af7958ef5 62 int semihost_ensure(FILEHANDLE fh);
emilmont 8:c14af7958ef5 63 long semihost_flen(FILEHANDLE fh);
emilmont 8:c14af7958ef5 64 int semihost_seek(FILEHANDLE fh, long position);
emilmont 8:c14af7958ef5 65 int semihost_istty(FILEHANDLE fh);
emilmont 8:c14af7958ef5 66
emilmont 8:c14af7958ef5 67 int semihost_remove(const char *name);
emilmont 8:c14af7958ef5 68 int semihost_rename(const char *old_name, const char *new_name);
emilmont 8:c14af7958ef5 69 #endif
emilmont 8:c14af7958ef5 70
emilmont 8:c14af7958ef5 71 int semihost_uid(char *uid);
emilmont 8:c14af7958ef5 72 int semihost_reset(void);
emilmont 8:c14af7958ef5 73 int semihost_vbus(void);
emilmont 8:c14af7958ef5 74 int semihost_powerdown(void);
emilmont 8:c14af7958ef5 75 int semihost_exit(void);
emilmont 8:c14af7958ef5 76
emilmont 8:c14af7958ef5 77 int semihost_connected(void);
emilmont 8:c14af7958ef5 78 int semihost_disabledebug(void);
emilmont 8:c14af7958ef5 79
emilmont 8:c14af7958ef5 80 #ifdef __cplusplus
emilmont 8:c14af7958ef5 81 }
emilmont 8:c14af7958ef5 82 #endif
emilmont 8:c14af7958ef5 83
emilmont 8:c14af7958ef5 84 #endif