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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#
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05005# This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connorf076a3e2008-02-25 22:25:15 -05006
7# Output directory
8OUT=out/
9
10# Source files
Kevin O'Connor30853762009-01-17 18:49:20 -050011SRCBOTH=output.c util.c floppy.c ata.c misc.c mouse.c kbd.c pci.c \
Kevin O'Connor0c3068d2008-12-21 17:51:36 -050012 serial.c clock.c pic.c cdrom.c ps2port.c smpdetect.c resume.c \
Kevin O'Connor51358db2008-12-28 21:50:29 -050013 pnpbios.c pirtable.c
Kevin O'Connor30853762009-01-17 18:49:20 -050014SRC16=$(SRCBOTH) system.c disk.c apm.c pcibios.c vgahooks.c font.c
Kevin O'Connor9f4e1d92009-02-08 15:44:08 -050015SRC32=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \
Kevin O'Connor7061eb62009-01-04 21:48:22 -050016 acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050017
Kevin O'Connor786502d2008-02-27 10:41:41 -050018cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \
19 /dev/null 2>&1`"; then echo "$(2)"; else echo "$(3)"; fi ;)
20
Kevin O'Connorbdce35f2008-02-26 21:33:14 -050021# Default compiler flags
Kevin O'Connorba2d0df2008-04-13 16:59:03 -040022COMMONCFLAGS = -Wall -Os -MD -m32 -march=i386 -mregparm=3 \
Kevin O'Connor03f630e2009-03-26 20:45:36 -040023 -mpreferred-stack-boundary=2 -mrtd -freg-struct-return \
Kevin O'Connorbc28a2b2008-03-11 19:32:38 -040024 -ffreestanding -fwhole-program -fomit-frame-pointer \
Kevin O'Connor7bb32532009-01-04 11:15:36 -050025 -fno-delete-null-pointer-checks -Wno-strict-aliasing
Kevin O'Connor786502d2008-02-27 10:41:41 -050026COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
27COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
28COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
29
Kevin O'Connorc43bcba2008-07-30 20:37:13 -040030override CFLAGS = $(COMMONCFLAGS) -g -DMODE16=0
Kevin O'Connor7ab798f2008-07-13 11:08:36 -040031CFLAGS16INC = $(COMMONCFLAGS) -DMODE16=1 -fno-jump-tables -fno-defer-pop \
Kevin O'Connor96462242009-01-01 17:54:16 -050032 $(call cc-option,$(CC),--param large-stack-frame=4,)
Kevin O'Connor202024a2009-01-17 10:41:28 -050033CFLAGS16INC += -ffunction-sections -fdata-sections
Kevin O'Connor410680b2008-03-02 20:48:35 -050034CFLAGS16 = $(CFLAGS16INC) -g
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050035
Kevin O'Connor30853762009-01-17 18:49:20 -050036all: $(OUT) $(OUT)bios.bin
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050037
38# Run with "make V=1" to see the actual compile commands
39ifdef V
40Q=
41else
42Q=@
43endif
44
Kevin O'Connor2fc90bd2008-11-07 21:42:00 -050045OBJCOPY=objcopy
Kevin O'Connor202024a2009-01-17 10:41:28 -050046OBJDUMP=objdump
Kevin O'Connor2fc90bd2008-11-07 21:42:00 -050047NM=nm
48STRIP=strip
49
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050050.PHONY : all FORCE
51
52vpath %.c src
53vpath %.S src
54
55################ Build rules
Kevin O'Connor410680b2008-03-02 20:48:35 -050056
Kevin O'Connor03f630e2009-03-26 20:45:36 -040057TESTGCC:=$(shell CC=$(CC) tools/test-gcc.sh)
58ifeq "$(TESTGCC)" "-1"
59$(error "Please upgrade GCC")
60endif
61
Kevin O'Connor231f7102009-01-25 16:11:27 -050062ifndef AVOIDCOMBINE
Kevin O'Connor03f630e2009-03-26 20:45:36 -040063AVOIDCOMBINE=$(TESTGCC)
Kevin O'Connor231f7102009-01-25 16:11:27 -050064endif
65
Kevin O'Connor410680b2008-03-02 20:48:35 -050066# Do a whole file compile - two methods are supported. The first
67# involves including all the content textually via #include
68# directives. The second method uses gcc's "-combine" option.
Kevin O'Connor231f7102009-01-25 16:11:27 -050069ifeq "$(AVOIDCOMBINE)" "1"
Kevin O'Connor410680b2008-03-02 20:48:35 -050070define whole-compile
71@echo " Compiling whole program $3"
Kevin O'Connor86cebee2008-11-06 18:57:10 -050072$(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
Kevin O'Connor410680b2008-03-02 20:48:35 -050073$(Q)$(CC) $1 -c $3.tmp.c -o $3
74endef
75else
Kevin O'Connor410680b2008-03-02 20:48:35 -050076define whole-compile
77@echo " Compiling whole program $3"
78$(Q)$(CC) $1 -combine -c $2 -o $3
79endef
80endif
81
82
Kevin O'Connor30853762009-01-17 18:49:20 -050083$(OUT)%.s: %.c
Kevin O'Connor9e821222008-12-06 18:56:19 -050084 @echo " Compiling to assembler $@"
Kevin O'Connor30853762009-01-17 18:49:20 -050085 $(Q)$(CC) $(CFLAGS16INC) -S -c $< -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050086
87$(OUT)%.lds: %.lds.S
Kevin O'Connor9e821222008-12-06 18:56:19 -050088 @echo " Precompiling $@"
Kevin O'Connord9a8b2d2008-11-16 09:17:02 -050089 $(Q)$(CPP) -P -D__ASSEMBLY__ $< -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050090
Kevin O'Connor30853762009-01-17 18:49:20 -050091$(OUT)asm-offsets.h: $(OUT)asm-offsets.s
Kevin O'Connor952974e2008-11-16 18:14:33 -050092 @echo " Generating offset file $@"
93 $(Q)./tools/gen-offsets.sh $< $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050094
Kevin O'Connor9e821222008-12-06 18:56:19 -050095$(OUT)ccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050096
Kevin O'Connor30853762009-01-17 18:49:20 -050097$(OUT)romlayout16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h
Kevin O'Connor9e821222008-12-06 18:56:19 -050098 @echo " Compiling (16bit) $@"
99 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500100
Kevin O'Connor9e821222008-12-06 18:56:19 -0500101$(OUT)ccode32.o: ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@)
Kevin O'Connor2fda7cb2008-07-05 20:41:53 -0400102
Kevin O'Connor9e821222008-12-06 18:56:19 -0500103$(OUT)rom32.o: $(OUT)ccode32.o $(OUT)rombios32.lds
Kevin O'Connor2fda7cb2008-07-05 20:41:53 -0400104 @echo " Linking (no relocs) $@"
Kevin O'Connor7cf17f22009-04-08 21:10:08 -0400105 $(Q)$(LD) -r -T $(OUT)rombios32.lds $< -o $@
Kevin O'Connor2fda7cb2008-07-05 20:41:53 -0400106
Kevin O'Connor202024a2009-01-17 10:41:28 -0500107$(OUT)romlayout.lds: $(OUT)romlayout16.o
108 @echo " Building layout information $@"
Kevin O'Connor711ddc62009-01-17 15:17:34 -0500109 $(Q)$(OBJDUMP) -h $< | ./tools/layoutrom.py $@
Kevin O'Connor202024a2009-01-17 10:41:28 -0500110
111$(OUT)rombios16.lds: $(OUT)romlayout.lds
112
Kevin O'Connord2899772008-07-06 09:56:14 -0400113$(OUT)rom16.o: $(OUT)romlayout16.o $(OUT)rom32.o $(OUT)rombios16.lds
Kevin O'Connor9e821222008-12-06 18:56:19 -0500114 @echo " Linking (16bit) $@"
Kevin O'Connor86cebee2008-11-06 18:57:10 -0500115 $(Q)$(OBJCOPY) --prefix-symbols=_code32_ $(OUT)rom32.o $(OUT)rom32.rename.o
116 $(Q)$(LD) -T $(OUT)rombios16.lds -R $(OUT)rom32.rename.o $< -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500117
Kevin O'Connord2899772008-07-06 09:56:14 -0400118$(OUT)rom.o: $(OUT)rom16.o $(OUT)rom32.o $(OUT)rombios.lds
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500119 @echo " Linking $@"
Kevin O'Connor86cebee2008-11-06 18:57:10 -0500120 $(Q)$(LD) -T $(OUT)rombios.lds $(OUT)rom16.o $(OUT)rom32.o -o $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500121
Kevin O'Connord2899772008-07-06 09:56:14 -0400122$(OUT)bios.bin.elf: $(OUT)rom.o
Kevin O'Connor9bcc5272008-07-05 21:08:56 -0400123 @echo " Prepping $@"
Kevin O'Connor86cebee2008-11-06 18:57:10 -0500124 $(Q)$(NM) $< | ./tools/checkrom.py
125 $(Q)$(STRIP) $< -o $@
Kevin O'Connor2fda7cb2008-07-05 20:41:53 -0400126
127$(OUT)bios.bin: $(OUT)bios.bin.elf
128 @echo " Extracting binary $@"
Kevin O'Connor86cebee2008-11-06 18:57:10 -0500129 $(Q)$(OBJCOPY) -O binary $< $@
Kevin O'Connor2fda7cb2008-07-05 20:41:53 -0400130
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500131
132####### Generic rules
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500133clean:
Kevin O'Connor86cebee2008-11-06 18:57:10 -0500134 $(Q)rm -rf $(OUT)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500135
136$(OUT):
Kevin O'Connor86cebee2008-11-06 18:57:10 -0500137 $(Q)mkdir $@
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500138
139-include $(OUT)*.d