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Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001# Legacy Bios build system
2#
3# Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4#
5# This file may be distributed under the terms of the GNU GPLv3 license.
6
7# Output directory
8OUT=out/
9
10# Source files
Kevin O'Connore6eb3f52008-04-13 17:37:41 -040011SRCBOTH=output.c util.c floppy.c ata.c kbd.c pci.c boot.c serial.c clock.c
12SRC16=$(SRCBOTH) disk.c system.c mouse.c cdrom.c apm.c pcibios.c
Kevin O'Connor276d4a92008-06-11 22:47:01 -040013SRC32=$(SRCBOTH) post.c shadow.c rombios32.c post_menu.c memmap.c coreboot.c \
14 acpi.c
Kevin O'Connor44c631d2008-03-02 11:24:36 -050015TABLESRC=font.c cbt.c floppy_dbt.c
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050016
Kevin O'Connor786502d2008-02-27 10:41:41 -050017cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \
18 /dev/null 2>&1`"; then echo "$(2)"; else echo "$(3)"; fi ;)
19
Kevin O'Connorbdce35f2008-02-26 21:33:14 -050020# Default compiler flags
Kevin O'Connorba2d0df2008-04-13 16:59:03 -040021COMMONCFLAGS = -Wall -Os -MD -m32 -march=i386 -mregparm=3 \
22 -mpreferred-stack-boundary=2 -mrtd \
Kevin O'Connorbc28a2b2008-03-11 19:32:38 -040023 -ffreestanding -fwhole-program -fomit-frame-pointer \
24 -fno-delete-null-pointer-checks
Kevin O'Connor786502d2008-02-27 10:41:41 -050025COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
26COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
27COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
28
29CFLAGS = $(COMMONCFLAGS) -g
Kevin O'Connora2d16922008-05-12 23:44:57 -040030CFLAGS16INC = $(COMMONCFLAGS) -DMODE16 -fno-jump-tables -fno-defer-pop \
31 $(call cc-option,$(CC),--param large-stack-frame=8,)
Kevin O'Connor410680b2008-03-02 20:48:35 -050032CFLAGS16 = $(CFLAGS16INC) -g
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050033
Kevin O'Connor44c631d2008-03-02 11:24:36 -050034TABLETMP=$(addprefix $(OUT), $(patsubst %.c,%.16.s,$(TABLESRC)))
Kevin O'Connor59fead62008-05-10 15:49:20 -040035all: $(OUT) $(OUT)bios.bin $(TABLETMP)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050036
37# Run with "make V=1" to see the actual compile commands
38ifdef V
39Q=
40else
41Q=@
42endif
43
44.PHONY : all FORCE
45
46vpath %.c src
47vpath %.S src
48
49################ Build rules
Kevin O'Connor410680b2008-03-02 20:48:35 -050050
51# Do a whole file compile - two methods are supported. The first
52# involves including all the content textually via #include
53# directives. The second method uses gcc's "-combine" option.
54ifdef AVOIDCOMBINE
55DEPHACK=
56define whole-compile
57@echo " Compiling whole program $3"
58$(Q)/bin/echo -e '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
59$(Q)$(CC) $1 -c $3.tmp.c -o $3
60endef
61else
62# Ugly way to get gcc to generate .d files correctly.
63DEPHACK=-combine src/null.c
64define whole-compile
65@echo " Compiling whole program $3"
66$(Q)$(CC) $1 -combine -c $2 -o $3
67endef
68endif
69
70
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050071$(OUT)%.proc.16.s: $(OUT)%.16.s
72 @echo " Moving data sections to text in $<"
Kevin O'Connord5f1e842008-02-28 20:01:11 -050073 $(Q)sed 's/\t\.section\t\.rodata.*// ; s/\t\.data//' < $< > $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050074
75$(OUT)%.16.s: %.c
76 @echo " Generating assembler for $<"
Kevin O'Connor410680b2008-03-02 20:48:35 -050077 $(Q)$(CC) $(CFLAGS16INC) $(DEPHACK) -S -c $< -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050078
79$(OUT)%.lds: %.lds.S
80 @echo " Precompiling $<"
81 $(Q)$(CPP) -P $< -o $@
82
83$(OUT)%.bin: $(OUT)%.o
84 @echo " Extracting binary $@"
85 $(Q)objcopy -O binary $< $@
86
87$(OUT)%.offset.auto.h: $(OUT)%.o
88 @echo " Generating symbol offset header $@"
Kevin O'Connor596cf602008-03-01 10:11:55 -050089 $(Q)nm $< | ./tools/defsyms.py $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050090
Kevin O'Connor410680b2008-03-02 20:48:35 -050091$(OUT)blob.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050092
Kevin O'Connor44c631d2008-03-02 11:24:36 -050093TABLEASM=$(addprefix $(OUT), $(patsubst %.c,%.proc.16.s,$(TABLESRC)))
Kevin O'Connor74534532008-05-12 18:28:58 -040094$(OUT)romlayout16.o: romlayout.S $(OUT)blob.16.s $(TABLEASM)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050095 @echo " Generating 16bit layout of $@"
96 $(Q)$(CC) $(CFLAGS16) -c $< -o $@
97
Kevin O'Connor74534532008-05-12 18:28:58 -040098$(OUT)rom16.o: $(OUT)romlayout16.o $(OUT)rombios16.lds
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050099 @echo " Linking $@"
Kevin O'Connor74534532008-05-12 18:28:58 -0400100 $(Q)ld -T $(OUT)rombios16.lds $< -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500101
Kevin O'Connor47baa3c2008-03-08 13:17:16 -0500102$(OUT)romlayout32.o: $(OUT)rom16.offset.auto.h ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500103
104$(OUT)rom32.o: $(OUT)romlayout32.o $(OUT)rombios32.lds
105 @echo " Linking $@"
106 $(Q)ld -T $(OUT)rombios32.lds $< -o $@
107
Kevin O'Connor59fead62008-05-10 15:49:20 -0400108$(OUT)bios.bin: $(OUT)rom16.bin $(OUT)rom32.bin $(OUT)rom16.offset.auto.h $(OUT)rom32.offset.auto.h
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500109 @echo " Building $@"
110 $(Q)./tools/buildrom.py
111
112####### Generic rules
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500113clean:
114 rm -rf $(OUT)
115
116$(OUT):
117 mkdir $@
118
119-include $(OUT)*.d