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> 
> I added a short version of your description to the flashrom README.

Ok


> I made some more changes to the Makefile. "make dos" is something I'd
> rather avoid because it hardcodes too many assumptions.

I would prefer to have there something like:

make djgpp-dos

because I will tend to forgot how to invoke the make from command line.


> 
>> Index: physmap.c
>> ===================================================================
>> --- physmap.c        (revision 935)
>> +++ physmap.c        (working copy)
>> @@ -4,6 +4,7 @@
>>   * Copyright (C) 2009 Peter Stuge <[email protected]>
>>   * Copyright (C) 2009 coresystems GmbH
>>   * Copyright (C) 2010 Carl-Daniel Hailfinger
>> + * Copyright (C) 2010 Rudolf Marek <[email protected]>
>>   *
>>   * This program is free software; you can redistribute it and/or modify
>>   * it under the terms of the GNU General Public License as published by
>> @@ -27,7 +28,77 @@
>>  #include <errno.h>
>>  #include "flash.h"
>>  
>> -#ifdef __DARWIN__
>> +#ifdef __DJGPP__
>> [...]
>> +#elif __DARWIN__
>>   
> 
> Can you change this to
> #elif defined(__DARWIN)
> to keep the logic as it was? I don't have a Mac OS X machine, so I can't
> test...

yes sorry fixed.

> 
> 
>> +
>>  #include <DirectIO/darwinio.h>
>>  
>>  #define MEM_DEV "DirectIO"
>>   
> 
> If you drop the board_enable.c hunk (and if my latest Makefile+README
> patch is OK for you), this is
> Acked-by: Carl-Daniel Hailfinger <[email protected]>
> 
> I can update the README once your pciutils patch has been merged.
> 

I dont know who can commit this, I'm attaching the fixed patch.

Signed-off-by: Rudolf Marek <[email protected]>

Please check that in, so at least something is there ;)
The libpci fixes etc can wait until Martin shows up.

Thanks,
Rudolf
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Index: hwaccess.c
===================================================================
--- hwaccess.c	(revision 943)
+++ hwaccess.c	(working copy)
@@ -36,7 +36,9 @@
 	if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) {
 #elif defined(__FreeBSD__) || defined (__DragonFly__)
 	if ((io_fd = open("/dev/io", O_RDWR)) < 0) {
-#else
+#elif __DJGPP__
+	if (0) {
+#else 
 	if (iopl(3) != 0) {
 #endif
 		fprintf(stderr, "ERROR: Could not get I/O privileges (%s).\n"
@@ -52,8 +54,46 @@
 #endif
 }
 
+#ifdef __DJGPP__
+
+extern unsigned short  segFS;
+
+#include <sys/farptr.h>
+
 void mmio_writeb(uint8_t val, void *addr)
 {
+	_farpokeb(segFS, (unsigned long) addr, val);
+}
+
+void mmio_writew(uint16_t val, void *addr)
+{
+	_farpokew(segFS, (unsigned long) addr, val);
+}
+
+void mmio_writel(uint32_t val, void *addr)
+{
+	_farpokel(segFS, (unsigned long) addr, val);
+}
+
+uint8_t mmio_readb(void *addr)
+{
+	return _farpeekb(segFS, (unsigned long) addr);
+}
+
+uint16_t mmio_readw(void *addr)
+{
+	return _farpeekw(segFS, (unsigned long) addr);
+}
+
+uint32_t mmio_readl(void *addr)
+{
+	return _farpeekl(segFS, (unsigned long) addr);
+}
+
+#else
+
+void mmio_writeb(uint8_t val, void *addr)
+{
 	*(volatile uint8_t *) addr = val;
 }
 
@@ -81,3 +121,4 @@
 {
 	return *(volatile uint32_t *) addr;
 }
+#endif
Index: hwaccess.h
===================================================================
--- hwaccess.h	(revision 943)
+++ hwaccess.h	(working copy)
@@ -68,14 +68,32 @@
   #define INW  inw
   #define INL  inl
 #else
+
+#ifdef __DJGPP__
+
+#include <pc.h>
+
+  #define OUTB(x,y) outportb(y, x)
+  #define OUTW(x,y) outportw(y, x)
+  #define OUTL(x,y) outportl(y, x)
+
+  #define INB  inportb
+  #define INW  inportw
+  #define INL  inportl
+
+#else 
+
   #define OUTB outb
   #define OUTW outw
   #define OUTL outl
   #define INB  inb
   #define INW  inw
   #define INL  inl
+
 #endif
+
 #endif
+#endif
 
 #if defined(__NetBSD__)
   #define off64_t off_t
Index: physmap.c
===================================================================
--- physmap.c	(revision 943)
+++ physmap.c	(working copy)
@@ -4,6 +4,7 @@
  * Copyright (C) 2009 Peter Stuge <[email protected]>
  * Copyright (C) 2009 coresystems GmbH
  * Copyright (C) 2010 Carl-Daniel Hailfinger
+ * Copyright (C) 2010 Rudolf Marek <[email protected]>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,7 +28,77 @@
 #include <errno.h>
 #include "flash.h"
 
-#ifdef __DARWIN__
+#ifdef __DJGPP__
+#include <dpmi.h>
+
+#define MEM_DEV "dpmi"
+
+unsigned short  segFS = 0;
+
+void *sys_physmap(unsigned long phys_addr, size_t len)
+{
+	int ret;
+	__dpmi_meminfo mi;
+
+	if (segFS == 0)  {
+		segFS = __dpmi_allocate_ldt_descriptors (1);
+		__dpmi_set_segment_base_address (segFS, 0x0);
+		__dpmi_set_segment_limit (segFS, 0xffffffff);
+	}
+
+	mi.address = phys_addr;
+	mi.size = len;
+	ret =  __dpmi_physical_address_mapping (&mi);
+
+	if (ret != 0) {
+		return NULL;
+	}
+
+	return (void *) mi.address;
+}
+
+#define sys_physmap_rw_uncached	sys_physmap
+
+#include <sys/movedata.h>
+#include <sys/segments.h>
+#include <go32.h>
+
+static void *realmem_cpy;
+
+void *sys_physmap_ro_cached(unsigned long phys_addr, size_t len)
+{
+	/* no support for not a 1MB of mem */
+	if ((phys_addr + len) > 1024*1024)
+		return NULL;
+
+	if (realmem_cpy)
+		return realmem_cpy + phys_addr;
+
+	realmem_cpy = valloc(1024*1024);
+
+	if (!realmem_cpy)
+		return NULL;
+
+	movedata(_dos_ds, 0, _my_ds(), (unsigned long) realmem_cpy, 1024*1024);
+	return realmem_cpy + phys_addr;
+}
+
+
+void physunmap(void *virt_addr, size_t len)
+{
+	__dpmi_meminfo mi;
+
+	/* we ignore unmaps for our cheat 1MB copy */
+	if ((virt_addr >= realmem_cpy) && ((virt_addr + len) <= (realmem_cpy + 1024*1024))) {
+		return;
+	}
+
+	mi.address = (unsigned long) virt_addr;
+	__dpmi_free_physical_address_mapping(&mi);
+}
+
+#elif defined(__DARWIN__)
+
 #include <DirectIO/darwinio.h>
 
 #define MEM_DEV "DirectIO"
Index: Makefile
===================================================================
--- Makefile	(revision 943)
+++ Makefile	(working copy)
@@ -2,6 +2,7 @@
 # This file is part of the flashrom project.
 #
 # Copyright (C) 2005 coresystems GmbH <[email protected]>
+# Copyright (C) 2009,2010 Carl-Daniel Hailfinger
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -20,15 +21,22 @@
 PROGRAM = flashrom
 
 CC      ?= gcc
-STRIP   = strip
+STRIP   ?= strip
 INSTALL = install
 DIFF    = diff
 PREFIX  ?= /usr/local
 MANDIR  ?= $(PREFIX)/share/man
-CFLAGS  ?= -Os -Wall -Werror -Wshadow
+CFLAGS  ?= -Os -Wall -Wshadow
 EXPORTDIR ?= .
 
-OS_ARCH	= $(shell uname)
+WARNERROR ?= yes
+
+ifeq ($(WARNERROR), yes)
+CFLAGS += -Werror
+endif
+
+# FIXME We have to differentiate between host and target arch.
+OS_ARCH	?= $(shell uname)
 ifneq ($(OS_ARCH), SunOS)
 STRIP_ARGS = -s
 endif
@@ -40,6 +48,12 @@
 CPPFLAGS += -I/usr/local/include
 LDFLAGS += -L/usr/local/lib
 endif
+ifeq ($(OS_ARCH), DOS)
+CPPFLAGS += -I../libgetopt -I../libpci/include
+# Bus Pirate and Serprog are not supported under DOS.
+CONFIG_BUSPIRATESPI = no
+CONFIG_SERPROG = no
+endif
 
 CHIP_OBJS = jedec.o stm50flw0x0x.o w39v040c.o w39v080fa.o sharplhf00l04.o w29ee011.o \
 	sst28sf040.o m29f400bt.o 82802ab.o pm49fl00x.o \
@@ -188,14 +202,28 @@
 endif
 
 ifeq ($(NEED_PCI), yes)
-LIBS += -lpci
+ifneq ($(OS_ARCH), DOS)
+# FIXME This workaround is needed until libpci detection can handle
+# cross-compiling for DOS.
+CHECK_LIBPCI = yes
+endif
+endif
+
+ifeq ($(NEED_PCI), yes)
 FEATURE_CFLAGS += -D'NEED_PCI=1'
 PROGRAMMER_OBJS += pcidev.o physmap.o hwaccess.o
 ifeq ($(OS_ARCH), NetBSD)
 LIBS += -lpciutils #		The libpci we want.
 LIBS += -l$(shell uname -p) #	For (i386|x86_64)_iopl(2).
+else
+ifeq ($(OS_ARCH), DOS)
+# FIXME There needs to be a better way to do this
+LIBS += ../libpci/lib/libpci.a ../libgetopt/libgetopt.a
+else
+LIBS += -lpci
 endif
 endif
+endif
 
 ifeq ($(CONFIG_PRINT_WIKI), yes)
 FEATURE_CFLAGS += -D'PRINT_WIKI_SUPPORT=1'
@@ -205,7 +233,7 @@
 # We could use PULLED_IN_LIBS, but that would be ugly.
 FEATURE_LIBS += $(shell LC_ALL=C grep -q "NEEDLIBZ := yes" .libdeps && printf "%s" "-lz")
 
-OBJS = $(CHIP_OBJS) $(CLI_OBJS) $(PROGRAMMER_OBJS) $(LIB_OBJS)
+OBJS = $(CHIP_OBJS) $(CLI_OBJS) $(PROGRAMMER_OBJS) $(LIB_OBJS) $(OS_OBJS)
 
 $(PROGRAM): $(OBJS)
 	$(CC) $(LDFLAGS) -o $(PROGRAM) $(OBJS) $(FEATURE_LIBS) $(LIBS)
@@ -239,7 +267,7 @@
 		rm -f .test.c .test; exit 1)
 	@rm -f .test.c .test
 
-ifeq ($(NEED_PCI), yes)
+ifeq ($(CHECK_LIBPCI), yes)
 pciutils: compiler
 	@printf "Checking for libpci headers... "
 	@$(shell ( echo "#include <pci/pci.h>";		   \
@@ -315,6 +343,9 @@
 	@rm -rf $(EXPORTDIR)/flashrom-$(RELEASENAME)
 	@echo Created $(EXPORTDIR)/flashrom-$(RELEASENAME).tar.bz2
 
-.PHONY: all clean distclean dep compiler pciutils features export tarball
+djgpp-dos: clean
+	make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip WARNERROR=no OS_ARCH=DOS
 
+.PHONY: all clean distclean dep compiler pciutils features export tarball dos
+
 -include .dependencies

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