deac/osd-contiki
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

The Micro-Executable Format (MEF) support (experimental).

Browse source
This commit is contained in:
matsutsuka 2007-11-28 06:13:24 +00:00
parent bcfc99fa5b
commit fbb8fb409a
4 changed files with 228 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
cpu/z80/Makefile.z80
View file

@ -2,7 +2,7 @@
# Makefile for z80/SDCC
# @author Takahide Matsutsuka <markn@markn.org>
#
# $Id: Makefile.z80,v 1.9 2007/10/01 23:04:02 matsutsuka Exp $
# $Id: Makefile.z80,v 1.10 2007/11/28 06:13:24 matsutsuka Exp $
#
### Compiler definitions
@ -29,12 +29,14 @@ AROPTS = -a
CLEAN += *.lnk *.sym *.lib contiki.ihx
### CPU-dependent directories
CONTIKI_CPU_DIRS = . dev lib
CONTIKI_CPU_DIRS = . dev lib loader
### CPU-dependent source files
CONTIKI_SOURCEFILES += strcasecmp.c mtarch.c uip_arch.c \
libconio_z80.c log-conio.c rs232.c
libconio_z80.c log-conio.c rs232.c \
mef.c
CONTIKI_ASMFILES += uip_arch-asm.S crt0.S
#crt-prg.S
CONTIKI_CASMOBJECTFILES = ${addprefix $(OBJECTDIR)/,$(CONTIKI_CASMFILES:.cS=.o)}
@ -66,3 +68,13 @@ contiki-$(TARGET).lib: $(CONTIKI_OBJECTFILES) $(PROJECT_OBJECTFILES) $(CONTIKI_A
contiki.ihx: contiki-$(TARGET).lib $(OBJECTDIR)/crt0.o
$(CC) $(LDFLAGS) -o $@ $(OBJECTDIR)/crt0.o -lcontiki-$(TARGET).lib
$(LD) -nf contiki
LDPFLAGS = -mz80 --out-fmt-ihx --no-std-crt0 --code-loc 0 --data-loc 0
test.ihx: contiki-$(TARGET).lib $(OBJECTDIR)/crt-prg.o
$(CC) $(LDPFLAGS) -o $@ $(OBJECTDIR)/crt-prg.o -lcontiki-$(TARGET).lib
$(LD) -nf test
%.ihx: contiki-$(TARGET).lib $(OBJECTDIR)/%*.o
$(CC) $(LDPFLAGS) -o $@ $(OBJECTDIR)/$*.o -lcontiki-$(TARGET).lib
$(LD) -nf $*

11
cpu/z80/crt0.S
View file

@ -1,4 +1,13 @@
;; crt0.S for Contiki
;;;
;;;
;;; ctt0.S
;;;
;;; \file
;;; C runtime startup routine
;;;
;;; \author
;;; Takahide Matsutsuka <markn@markn.org>
;;;
.module crt0
.globl _main

107
cpu/z80/loader/mef.c Normal file
View file

@ -0,0 +1,107 @@
/*
* Copyright (c) 2007, Takahide Matsutsuka.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: mef.c,v 1.1 2007/11/28 06:13:24 matsutsuka Exp $
*
*/
/*
* \file
* mef.c
* The Micro Executable Format
* \author
* Takahide Matsutsuka <markn@markn.org>
*/
#ifdef WITH_LOADER_ARCH
#include "contiki.h"
#include "loader/mef.h"
struct Area areas[MEF_AREA_MAX];
void
mef_load(unsigned char* offset)
{
unsigned char* start = offset;
unsigned char areasize = load_byte();
u16_t relocsize;
unsigned int i, j;
u16_t checksum = 0;
unsigned char* buf;
struct Relocation reloc;
for (i = 0; i < areasize; i++) {
buf = (unsigned char *) &areas[i];
for (j = 0; j < sizeof(struct Area); j++) {
*buf++ = load_byte();
}
}
for (i = 0; i < areasize; i++) {
for (j = 0; j < areas[i].size; j++) {
*offset = load_byte();
checksum += *offset;
offset++;
}
if (areas[i].checksum != checksum) {
// Checksum error!
}
}
// relocation information
relocsize = load_byte();
relocsize = (load_byte() << 8) + relocsize;
for (i = 0; i < relocsize; i++) {
buf = (unsigned char *) &reloc;
for (j = 0; j < sizeof(struct Relocation); j++) {
*buf++ = load_byte();
}
mef_reloc(start, &reloc);
}
}
void
mef_reloc(unsigned char* offset, struct Relocation *reloc)
{
if (reloc->mode & MEF_RELOC_ABSOLUTE) {
return;
}
offset += reloc->address;
if (reloc->mode & MEF_RELOC_MSB_BYTE) {
*offset = (unsigned char) ((reloc->data + (u16_t) offset) >> 8);
} else if (reloc->mode & MEF_RELOC_LSB_BYTE) {
*offset = (unsigned char) ((reloc->data + (u16_t) offset) & 0xff);
} else { /* word */
*offset++ = (unsigned char) ((reloc->data + (u16_t) offset) & 0xff);
*offset = (unsigned char) ((reloc->data + (u16_t) offset) >> 8);
}
}
#endif /* WITH_LOADER_ARCH */

95
cpu/z80/loader/mef.h Normal file
View file

@ -0,0 +1,95 @@
/*
* Copyright (c) 2007, Takahide Matsutsuka.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: mef.h,v 1.1 2007/11/28 06:13:24 matsutsuka Exp $
*
*/
/*
* \file
* mef.h
* The Micro Executable Format
* \author
* Takahide Matsutsuka <markn@markn.org>
*/
/*
* MEF file format:
* [AreaDecls]
* BYTE nAreas (0-15)
* struct AreaSize[nAreas]
* [Data]
* binary*
* [Relocation]
* WORD nRelocs
* struct Relocation[nRelocs]
*/
#ifndef __MEF_H__
#define __MEF_H__
/*
* mode
* bit 7: read/write (1) / read only (0)
* bit 3-0: Area index
* checksum
* just a sum of all data of the area
*/
#define MEF_AREA_RW 0x80
#define MEF_AREA_MAX 0x10
struct Area {
unsigned char mode;
u16_t size;
u16_t checksum;
};
/*
* mode
* bit 7: Absolute (1) / Relative (0)
* bit 6: MSB (1) / LSB (0) (in byte mode)
* bit 5: Byte mode (1) / Word mode (0)
*/
#define MEF_RELOC_ABSOLUTE 0x80
#define MEF_RELOC_MSB_BYTE 0x60
#define MEF_RELOC_LSB_BYTE 0x20
struct Relocation {
unsigned char mode;
u16_t address;
u16_t data;
};
unsigned char load_byte();
void mef_load(unsigned char* offset);
unsigned char load_byte();
void mef_reloc(unsigned char* offset, struct Relocation* reloc);
#endif /* __MEF_H__ */