# Iris: micro-kernel for a capability-based operating system.
# mips/Makefile.arch: mips-specific parts of the build rules
# Copyright 2009 Bas Wijnen <wijnen@debian.org>
#
# 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
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

load = 0x80000000

ARCH_CXXFLAGS = -DNUM_THREADS=1
ARCH_CPPFLAGS = -Imips -Wa,-mips32
CROSS = mipsel-linux-gnu-
OBJDUMP = $(CROSS)objdump
junk = mdebug.abi32 reginfo comment pdr
OBJCOPYFLAGS = $(addprefix --remove-section=.,$(junk))

arch_kernel_sources = mips/interrupts.cc mips/test.cc mips/arch.cc
boot_sources = mips/init.cc
BUILT_SOURCES = $(kernel_sources) $(boot_sources)
arch_headers = mips/arch.hh
boot_threads = keyboard lcd

uimage:

mips/entry.o: $(boot_threads)
mips/init.o: TARGET_FLAGS = -I/usr/include
$(boot_threads): TARGET_FLAGS = -I.
$(boot_threads): mips/jz4730.hh boot-programs/devices.hh

# Transform ':' into ';' so vim doesn't think there are errors.
uimage: kernel.raw.gz Makefile mips/Makefile.arch
	mkimage -A MIPS -O Linux -C gzip -a $(load) -e 0x$(shell /bin/sh -c '$(OBJDUMP) -t kernel | grep __start$$ | cut -b-8') -n "Shevek's kernel" -d $< $@ | sed -e 's/:/;/g'

%.o:%.S Makefile mips/Makefile.arch mips/arch.hh
	$(CC) $(CPPFLAGS) $(TARGET_FLAGS) -DKERNEL_STACK_SIZE=0x2000 -c $< -o $@

# entry.o must be the first file.  boot.o must be the first of the init objects (which can be freed after loading).
kernel: mips/entry.o $(subst .cc,.o,$(kernel_sources)) mips/boot.o $(subst .cc,.o,$(boot_sources))
	$(LD) --omagic -Ttext $(load) $^ -o $@

%.raw: %
	$(OBJCOPY) -S $(addprefix --remove-section=.,$(junk)) -Obinary $< $@

%.gz: %
	gzip < $< > $@

ARCH_CLEAN_FILES = uimage kernel kernel.raw kernel.raw.gz $(boot_threads) mips/*.o