#
# Copyright (c) 1996-2001 University of Utah and the Flux Group.
# All rights reserved.
# 
# This file is part of the Flux OSKit.  The OSKit is free software, also known
# as "open source;" you can redistribute it and/or modify it under the terms
# of the GNU General Public License (GPL), version 2, as published by the Free
# Software Foundation (FSF).  To explore alternate licensing terms, contact
# the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
# 
# The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
# received a copy of the GPL along with the OSKit; see the file COPYING.  If
# not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
#

ifndef _boot_net_makerules_
_boot_net_makerules_ = yes

# For FreeBSD C library to compile correctly.
OSKIT_CFLAGS += -DOSKIT

# Transports to support
OSKIT_CFLAGS += -DFILEOPS_NFS -DFILEOPS_TFTP

# For the Utah testbed version.  Limits the number of device drivers linked
# in, forces it to BOOTP only on the fifth (control) interface, and forces
# it to use the serial line as its console.
# Note: don't need FORCESERIALCONSOLE here if booted via "fored" pxeboot.
OSKIT_CFLAGS += -DUTAHTESTBED #-DBOOTP_IF=4 #-DFORCESERIALCONSOLE

TARGETS = netboot
CLEAN_FILES += $(TARGETS)
# This must come before any includes since make runs the first rule
# found if not explicitly told not to.
all: $(TARGETS)

# Where to look for src files.
SRCDIRS += $(OSKIT_SRCDIR)/boot/net
MOSTLY_SRCDIRS = $(OSKIT_SRCDIR)/boot

INCDIRS +=	$(OSKIT_SRCDIR)/freebsd/libc/include			\
		$(OSKIT_SRCDIR)/freebsd/3.x/src/include			\
		$(OSKIT_SRCDIR)/freebsd/3.x/src/sys			\
		$(OSKIT_SRCDIR)/freebsd/3.x/src/lib/libc/i386		\
		$(OBJDIR)/freebsd/libc/objinclude			\
		$(OSKIT_SRCDIR)/boot/net

# We need this before including the generic rules so it
# doesn't get in there twice.
OBJFILES += version.o

# Include the makefile containing the generic rules.  This must come
# here since it depends on SRCDIRS and sets OBJFILES.  Yuck, I hate
# order dependence.
include $(OSKIT_SRCDIR)/GNUmakerules

# DEPENDLIBS is kind of bogus.  It makes it so we get rebuilt if *any*
# of the LIBS are newer than us.  It doesn't cause any libraries we
# need to be built though.
LIBS = -loskit_startup -loskit_clientos -loskit_memfs -loskit_fsnamespace \
	-loskit_udp -loskit_bootp \
	-loskit_linux_dev \
	-loskit_dev -loskit_exec -loskit_kern -loskit_lmm \
	-loskit_freebsd_c -loskit_com

DEPENDLIBS = $(filter %.a, $(foreach DIR,$(LIBDIRS),$(wildcard $(DIR)/*)))

DEPS = $(OBJDIR)/lib/multiboot.o $(OBJFILES) $(DEPENDLIBS) $(OBJDIR)/lib/crtn.o

version.c: $(filter-out version.o,$(DEPS))
	echo >$@ "char version[] = \"NetBoot metakernel v3.1.0\";"
	echo >>$@ "char build_info[] = \"Built `date +%d-%b-%Y` by `id -nu`@`hostname | sed 's/\..*//'`:`pwd`\";"
CLEAN_FILES += version.c

## Debugging hint: set the -Ttext to 3MB or so so you can run GDB and
## trace through the booted kernel (which presumably loads lower than
## 3MB).  Also, you can use the GDB `symbol-file' command to load the booted
## kernel's symbols once you get inside of it.
netboot: $(DEPS)
	$(OSKIT_QUIET_MAKE_INFORM) "Linking $@"
	$(LD) -o $@ -Ttext 100000 $(LDFLAGS) $(OSKIT_LDFLAGS) \
		$(OBJDIR)/lib/multiboot.o \
		$(OBJFILES) $(LIBS) \
		$(OBJDIR)/lib/crtn.o
	cp $@ $@.debug
	$(STRIP) $@
CLEAN_FILES += netboot.debug

# How to install it.
install: netboot
	-mkdir -p $(INSTALL_LIBDIR)/boot
	$(INSTALL_PROGRAM) netboot $(INSTALL_LIBDIR)/boot/netboot.mb
	$(INSTALL_PROGRAM) netboot.debug $(INSTALL_LIBDIR)/boot/netboot.mb.debug


# Rules to make special netboot binaries with specified drivers.
comma := ,
*-list = $(subst $(comma), ,$(subst -, -,$*))
*-drivers = $(filter-out -%,$(*-list))
*-options = $(subst @,=,$(patsubst -%,%,$(filter -%,$(*-list))))
*-DOs = $(patsubst %,print \"DO(%);\"; ,$(*-drivers))

netboot-%.mb: init-%.o $(DEPS)
	$(OSKIT_QUIET_MAKE_INFORM) "Linking $@"
	$(LD) -o $@ -s -Ttext 100000 $(LDFLAGS) $(OSKIT_LDFLAGS) \
		$(OBJDIR)/lib/multiboot.o \
		$(OBJFILES) $< $(LIBS) \
		$(OBJDIR)/lib/crtn.o

init-all-%.c:
	echo "/* Stub */" > $@

init-%.c: special-init.in drivers_desc.h
	awk '$$1 == "@DRIVERS@" { '"$(*-DOs)"' next } { print }' $< > $@

do-cpp = $(filter-out -MD,$(CC) $(OSKIT_CFLAGS) $(CFLAGS)) -x c -E

drivers_desc.h: drivers_desc.in $(OSKIT_SRCDIR)/oskit/dev/linux_ethernet.h
	$(do-cpp) -E -x c $< > $@

%.img.gz: %.img; gzip -9vc $< > $@
%.mb.gz: %.mb; gzip -9vc $< > $@
%.gz: %; gzip -9vc $< > $@

#%.uue: %; uuencode < $< > $@ $<
%:: %.uue; uudecode < $<

# Make a GRUB floppy with a given netboot on it.
grubnetboot-%.img: $(OSKIT_SRCDIR)/boot/mkdosfloppy \
		netboot-%.mb.gz grubnetboot-%.lst \
		grub-msdos-floppy.img.gz
	$(<D)/$(<F) -img grub-msdos-floppy.img.gz -o $@ \
		grubnetboot-$*.lst:/boot/grub/menu.lst \
		netboot-$*.mb.gz:/netboot.gz

grubnetboot-%.lst:	$(OSKIT_SRCDIR)/boot/net/grubnetboot.lst
	($(foreach o,$(*-options),echo '$o'; )echo ''; cat $<) > $@

grub-msdos-floppy.img.gz: $(OSKIT_SRCDIR)/boot/grub-msdos-floppy.img.gz.uue
	uudecode $< > $@

#
# Build a default set of boot images.
#
etherdrivers: $(OSKIT_SRCDIR)/oskit/dev/linux_ethernet.h \
	      $(OSKIT_SRCDIR)/boot/net/GNUmakerules
	$(OSKIT_QUIET_MAKE_INFORM) "Linking $@"
	(echo "#define driver(n,d,v,a,f,p) FOO n"; echo "#include \"$<\"") \
	| $(do-cpp) - \
	| sed '/^#/d;s/"//g' \
	| (echo 'etherdrivers := \'; awk '/^FOO/ { printf "%s ", $$2; }') >$@
-include etherdrivers

.PHONY: alldrivers
alldrivers: $(etherdrivers:%=%.image.gz)

grubnetboot-default-params = timeout@10-default@0
%.image.gz: grubnetboot-%-$(grubnetboot-default-params).img.gz
	ln -f $< $@

CLEAN_FILES += *.img *.gz drivers_desc.h etherdrivers

prepare:: drivers_desc.h etherdrivers

endif