# SeaBIOS build system for ALPHA CPUs
#
# Copyright (C) 2017-2022  Helge Deller <deller@gmx.de> for ALPHA
#
# This file may be distributed under the terms of the GNU LGPLv3 license.

# Output directory
OUT=out/

# Common command definitions
export HOSTCC             := $(CC)
export CONFIG_SHELL       := sh
export KCONFIG_AUTOHEADER := autoconf.h
export KCONFIG_CONFIG     := $(CURDIR)/.config
export LC_ALL             := C
CROSS_PREFIX=alpha-linux-gnu-
ifneq ($(CROSS_PREFIX),)
CC=$(CROSS_PREFIX)gcc
LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
endif
AS=$(CROSS_PREFIX)as
LD=$(CROSS_PREFIX)ld
OBJCOPY=$(CROSS_PREFIX)objcopy
OBJDUMP=$(CROSS_PREFIX)objdump
STRIP=$(CROSS_PREFIX)strip
PYTHON=python
CPP=cpp
IASL:=iasl
LD32BIT_FLAG:=

CORE = typhoon
SYSTEM = clipper

ASFLAGS = -Wa,-m21264 -Wa,--noexecstack
OPT= -O2
CFLAGS = $(OPT) -g1 -Wall -fvisibility=hidden -fno-strict-aliasing \
  -msmall-text -mno-fp-regs -mbuild-constants \
  -Wno-int-to-pointer-cast -Wno-pointer-to-int-cast
CFLAGS += -mcpu=ev67 -DSYSTEM_H='"sys-$(SYSTEM).h"' -DSEABIOS

# Source files
# misc.c stacks.c system.c resume.c pcibios.c hw/timer.c
SRCBOTH=output.c string.c block.c cdrom.c disk.c kbd.c \
    serial.c sercon.c clock.c vgahooks.c \
    apm.c cp437.c \
    hw/pci.c hw/rtc.c hw/dma.c hw/pic.c hw/serialio.c hw/ps2port.c \
    hw/usb.c hw/usb-uhci.c hw/usb-ohci.c hw/usb-ehci.c \
    hw/usb-hid.c hw/usb-msc.c hw/usb-uas.c \
    hw/blockcmd.c hw/floppy.c hw/ata.c hw/ramdisk.c \
    hw/lsi-scsi.c hw/esp-scsi.c hw/megasas.c hw/mpt-scsi.c \
    sha256.c sha512.c
# x86.c fw/smp.c fw/mttr.c malloc.c
SRC32FLAT=$(SRCBOTH) post.c e820map.c romfile.c optionroms.c \
    pmm.c font.c boot.c bootsplash.c jpeg.c bmp.c tcgbios.c sha1.c \
    hw/pcidevice.c hw/ahci.c hw/pvscsi.c hw/usb-xhci.c hw/usb-hub.c hw/sdcard.c \
    fw/coreboot.c fw/lzmadecode.c fw/multiboot.c fw/biostables.c \
    fw/paravirt.c fw/shadow.c fw/pciinit.c fw/smm.c fw/xen.c \
    fw/acpi.c fw/mptable.c fw/pirtable.c fw/smbios.c fw/romfile_loader.c \
    hw/virtio-ring.c hw/virtio-pci.c hw/virtio-blk.c hw/virtio-scsi.c \
    hw/tpm_drivers.c hw/nvme.c \
    version.c \
    alpha/alpha.c alpha/crb.c alpha/timer.c alpha/malloc.c \
    alpha/uart.c alpha/console.c \
    alpha/memset.c alpha/memcpy.c
# fw/csm.c
# alpha/console.c alpha/pci.c alpha/printf.c alpha/ps2port.c alpha/util.c \
# alpha/vgaio.c alpha/vgatables.c alpha/vgafonts.c
DIRS=src src/hw src/fw vgasrc src/alpha

# VGA src files
SRCVGA=vgasrc/vgainit.c vgasrc/vgabios.c vgasrc/vgafb.c vgasrc/swcursor.c \
    vgasrc/vgafonts.c vgasrc/vbe.c \
    vgasrc/stdvga.c vgasrc/stdvgamodes.c vgasrc/stdvgaio.c \
    vgasrc/clext.c vgasrc/bochsvga.c  \
    vgasrc/cbvga.c


# Default compiler flags
cc-option=$(shell if test -z "`$(1) $(2) -S -o /dev/null -xc /dev/null 2>&1`" \
    ; then echo "$(2)"; else echo "$(3)"; fi ;)

EXTRAVERSION=

CPPFLAGS = -P -MD -MT $@

COMMONCFLAGS := -I$(OUT) -Isrc -Ivgasrc -Os -MD -g \
    -Wall -Wno-strict-aliasing -Wold-style-definition \
    $(call cc-option,$(CC),-Wtype-limits,) \
    -fomit-frame-pointer \
    -freg-struct-return -ffreestanding -fno-delete-null-pointer-checks \
    -fdata-sections -fno-common -fno-merge-constants \
    -fno-builtin-printf -fno-ipa-sra
COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
COMMONCFLAGS += $(call cc-option,$(CC),-fno-pie,)
COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
COMMONCFLAGS += $(call cc-option,$(CC),-fstack-check=no,)
COMMONCFLAGS += $(call cc-option,$(CC),-mfast-indirect-calls,)
COMMA := ,

CFLAGS32FLAT := $(COMMONCFLAGS) -DMODE16=0 -DMODESEGMENT=0 $(CFLAGS)
CFLAGS16     := $(CFLAGS32FLAT) -I$(OUT)

# Run with "make V=1" to see the actual compile commands
ifdef V
Q=
else
Q=@
MAKEFLAGS += --no-print-directory
endif

# Default targets
-include $(KCONFIG_CONFIG)

target-y :=
target-$(CONFIG_ALPHA) += $(OUT)alpha-firmware.img

all: $(target-y)

# Make definitions
.PHONY : all clean distclean FORCE
.DELETE_ON_ERROR:


################ Common build rules

# Verify the build environment works.
TESTGCC:=$(shell OUT="$(OUT)" CC="$(CC)" LD="$(LD)" IASL="$(IASL)" scripts/test-build.sh)
ifeq "$(TESTGCC)" "-1"
$(error "Please upgrade the build environment")
endif

ifeq "$(TESTGCC)" "0"
# Use -fwhole-program
CFLAGSWHOLE=-fwhole-program -DWHOLE_PROGRAM
endif

# Do a whole file compile by textually including all C code.
define whole-compile
@echo "  Compiling whole program $3"
$(Q)printf '$(foreach i,$2,#include "$i"\n)' > $3.tmp.c
$(Q)$(CC) -I. $1 $(CFLAGSWHOLE) -c $3.tmp.c -o $3
endef

%.strip.o: %.o
	@echo "  Stripping $@"
	$(Q)$(STRIP) $< -o $@

$(OUT)%.s: %.c
	@echo "  Compiling to assembler $@"
	$(Q)$(CC) $(CFLAGS16) -S -c $< -o $@

$(OUT)%.o: %.c $(OUT)autoconf.h
	@echo "  Compile checking $@"
	$(Q)$(CC) $(CFLAGS32FLAT) -c $< -o $@

$(OUT)%.lds: %.lds.S
	@echo "  Precompiling $@"
	$(Q)$(CPP) $(CPPFLAGS) -D__ASSEMBLY__ $< -o $@

$(OUT)pal.o: src/alpha/pal.S $(OUT)autoconf.h $(OUT)autoversion.h
	@echo "  Compile checking $@"
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -c $< -o $@
$(OUT)console-low.o: src/alpha/console-low.S
	@echo "  Compile checking $@"
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -c $< -o $@
$(OUT)strlen.o: src/alpha/strlen.S
	@echo "  Compile checking $@"
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -c $< -o $@
$(OUT)sys-clipper.o: src/alpha/sys-$(SYSTEM).S
	@echo "  Compile checking $@"
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -c $< -o $@
ALPHA_ASM_LIBS := $(OUT)pal.o $(OUT)console-low.o $(OUT)strlen.o $(OUT)sys-clipper.o

$(OUT)__divqu.o: src/alpha/divide.S
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -DDIV           -c $< -o $@
$(OUT)__remqu.o: src/alpha/divide.S
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -DREM           -c $< -o $@
$(OUT)__divlu.o: src/alpha/divide.S
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -DDIV -DINTSIZE -c $< -o $@
$(OUT)__remlu.o: src/alpha/divide.S
	$(Q)$(CC) $(CFLAGS32FLAT) $(ASFLAGS) -D__ASSEMBLY__ -DREM -DINTSIZE -c $< -o $@
DIVLIBS := $(OUT)__divlu.o $(OUT)__remlu.o $(OUT)__divqu.o $(OUT)__remqu.o


################ Main BIOS build rules

$(OUT)asm-offsets.s: $(OUT)autoconf.h

$(OUT)asm-offsets.h: $(OUT)src/asm-offsets.s
	@echo "  Generating offset file $@"
	$(Q)./scripts/gen-offsets.sh $< $@

$(OUT)ccode32flat.o: $(OUT)autoversion.h $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC32FLAT)) ; $(call whole-compile, $(CFLAGS32FLAT), $(addprefix src/, $(SRC32FLAT)) $(SRCVGA),$@)

$(OUT)autoversion.h:
	$(Q)$(PYTHON) ./scripts/buildversion.py -e "$(EXTRAVERSION)" -t "$(CC);$(AS);$(LD);$(OBJCOPY);$(OBJDUMP);$(STRIP)" $(OUT)autoversion.h

$(OUT)alpha-firmware.img: $(OUT)autoconf.h $(OUT)ccode32flat.o src/version.c $(ALPHA_ASM_LIBS) $(DIVLIBS)
	@echo "  Linking $@"
	# $(Q)$(CPP) $(CPPFLAGS) -Isrc -D__ASSEMBLY__ src/alpha/pafirmware.lds.S -o $(OUT)pafirmware.lds
	$(Q)$(CC) $(CFLAGS32FLAT) -c src/version.c -o $(OUT)version.o
	$(Q)$(LD) -relax -N -T src/alpha/palcode.ld $(OUT)version.o $(ALPHA_ASM_LIBS) $(DIVLIBS) -o $@ -Map $@.map -e __start --as-needed $(OUT)ccode32flat.o $(LIBGCC)

################ Kconfig rules

define do-kconfig
$(Q)mkdir -p $(OUT)/scripts/kconfig/lxdialog
$(Q)mkdir -p $(OUT)/include/config
$(Q)mkdir -p $(addprefix $(OUT), $(DIRS))
$(Q)$(MAKE) -C $(OUT) -f $(CURDIR)/scripts/kconfig/Makefile srctree=$(CURDIR) src=scripts/kconfig obj=scripts/kconfig Q=$(Q) Kconfig=$(CURDIR)/src/Kconfig $1
endef

$(OUT)autoconf.h : $(KCONFIG_CONFIG) ; $(call do-kconfig, silentoldconfig)
$(KCONFIG_CONFIG): src/Kconfig vgasrc/Kconfig ; $(call do-kconfig, olddefconfig)
%onfig: ; $(call do-kconfig, $@)
help: ; $(call do-kconfig, $@)


################ Generic rules

clean:
	$(Q)rm -rf $(OUT)

distclean: clean
	$(Q)rm -f .config .config.old

-include $(OUT)*.d $(patsubst %,$(OUT)%/*.d,$(DIRS))