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

cpu/z80/Makefile.z80

@@ -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 \
-CONTIKI_ASMFILES += uip_arch-asm.S crt0.S
+	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 $*

cpu/z80/crt0.S

@@ -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
 

cpu/z80/loader/mef.c

@@ -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 */

cpu/z80/loader/mef.h

@@ -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__ */