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1# SeaBIOS build system
2#
3# Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
4#
5# This file may be distributed under the terms of the GNU LGPLv3 license.
6
7# Program version
8VERSION=0.6.1-$(shell date +"%Y%m%d_%H%M%S")-$(shell hostname)
9
10# Output directory
11OUT=out/
12
13# Source files
14SRCBOTH=misc.c pmm.c stacks.c output.c util.c block.c floppy.c ata.c mouse.c \
15 kbd.c pci.c serial.c clock.c pic.c cdrom.c ps2port.c smp.c resume.c \
16 pnpbios.c pirtable.c vgahooks.c ramdisk.c pcibios.c blockcmd.c \
17 usb.c usb-uhci.c usb-ohci.c usb-ehci.c usb-hid.c usb-msc.c \
18 virtio-ring.c virtio-pci.c virtio-blk.c
19SRC16=$(SRCBOTH) system.c disk.c apm.c font.c
20SRC32FLAT=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \
21 acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \
22 lzmadecode.c bootsplash.c jpeg.c usb-hub.c paravirt.c dev-i440fx.c
23SRC32SEG=util.c output.c pci.c pcibios.c apm.c stacks.c
24
25cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \
26 /dev/null 2>&1`"; then echo "$(2)"; else echo "$(3)"; fi ;)
27
28# Default compiler flags
29COMMONCFLAGS = -Os -MD -Wall -Wno-strict-aliasing -Wold-style-definition \
30 $(call cc-option,$(CC),-Wtype-limits,) \
31 -m32 -march=i386 -mregparm=3 -mpreferred-stack-boundary=2 \
32 -mrtd -minline-all-stringops \
33 -freg-struct-return -ffreestanding -fomit-frame-pointer \
34 -fno-delete-null-pointer-checks \
35 -ffunction-sections -fdata-sections -fno-common
36COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
37COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
38COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
39
40CFLAGS32FLAT = $(COMMONCFLAGS) -g -DMODE16=0 -DMODESEGMENT=0
41CFLAGSSEG = $(COMMONCFLAGS) -DMODESEGMENT=1 -fno-defer-pop \
42 $(call cc-option,$(CC),-fno-jump-tables,-DMANUAL_NO_JUMP_TABLE) \
43 $(call cc-option,$(CC),-fno-tree-switch-conversion,)
44CFLAGS32SEG = $(CFLAGSSEG) -DMODE16=0 -g
45CFLAGS16INC = $(CFLAGSSEG) -DMODE16=1 \
46 $(call cc-option,$(CC),--param large-stack-frame=4,-fno-inline)
47CFLAGS16 = $(CFLAGS16INC) -g
48
49all: $(OUT) $(OUT)bios.bin
50
51# Run with "make V=1" to see the actual compile commands
52ifdef V
53Q=
54else
55Q=@
56endif
57
58OBJCOPY=objcopy
59OBJDUMP=objdump
60STRIP=strip
61
62.PHONY : all FORCE
63
64vpath %.c src vgasrc
65vpath %.S src vgasrc
66
67################ Build rules
68
69# Verify the gcc configuration and test if -fwhole-program works.
70TESTGCC:=$(shell CC=$(CC) tools/test-gcc.sh)
71ifeq "$(TESTGCC)" "-1"
72$(error "Please upgrade GCC")
73endif
74
75ifndef COMPSTRAT
76COMPSTRAT=$(TESTGCC)
77endif
78
79# Do a whole file compile - three methods are supported.
80ifeq "$(COMPSTRAT)" "1"
81# First method - use -fwhole-program without -combine.
82define whole-compile
83@echo " Compiling whole program $3"
84$(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
85$(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -c $3.tmp.c -o $3
86endef
87else
88ifeq "$(COMPSTRAT)" "2"
89# Second menthod - don't use -fwhole-program at all.
90define whole-compile
91@echo " Compiling whole program $3"
92$(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
93$(Q)$(CC) $1 -c $3.tmp.c -o $3
94endef
95else
96# Third (and preferred) method - use -fwhole-program with -combine
97define whole-compile
98@echo " Compiling whole program $3"
99$(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -combine -c $2 -o $3
100endef
101endif
102endif
103
104%.strip.o: %.o
105@echo " Stripping $@"
106$(Q)$(STRIP) $< -o $@
107
108$(OUT)%.s: %.c
109@echo " Compiling to assembler $@"
110$(Q)$(CC) $(CFLAGS16INC) -S -c $< -o $@
111
112$(OUT)%.lds: %.lds.S
113@echo " Precompiling $@"
114$(Q)$(CPP) -P -D__ASSEMBLY__ $< -o $@
115
116$(OUT)asm-offsets.h: $(OUT)asm-offsets.s
117@echo " Generating offset file $@"
118$(Q)./tools/gen-offsets.sh $< $@
119
120
121$(OUT)ccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@)
122
123$(OUT)code32seg.o: ; $(call whole-compile, $(CFLAGS32SEG), $(addprefix src/, $(SRC32SEG)),$@)
124
125$(OUT)ccode32flat.o: ; $(call whole-compile, $(CFLAGS32FLAT), $(addprefix src/, $(SRC32FLAT)),$@)
126
127$(OUT)code16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h
128@echo " Compiling (16bit) $@"
129$(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@
130
131$(OUT)romlayout16.lds $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds $(OUT)code32flat.o: $(OUT)ccode32flat.o $(OUT)code32seg.o $(OUT)code16.o tools/layoutrom.py
132@echo " Building ld scripts (version \"$(VERSION)\")"
133$(Q)echo 'const char VERSION[] = "$(VERSION)";' > $(OUT)version.c
134$(Q)$(CC) $(CFLAGS32FLAT) -c $(OUT)version.c -o $(OUT)version.o
135$(Q)$(LD) -melf_i386 -r $(OUT)ccode32flat.o $(OUT)version.o -o $(OUT)code32flat.o
136$(Q)$(OBJDUMP) -thr $(OUT)code32flat.o > $(OUT)code32flat.o.objdump
137$(Q)$(OBJDUMP) -thr $(OUT)code32seg.o > $(OUT)code32seg.o.objdump
138$(Q)$(OBJDUMP) -thr $(OUT)code16.o > $(OUT)code16.o.objdump
139$(Q)./tools/layoutrom.py $(OUT)code16.o.objdump $(OUT)code32seg.o.objdump $(OUT)code32flat.o.objdump $(OUT)romlayout16.lds $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds
140
141
142$(OUT)rom16.o: $(OUT)code16.o $(OUT)romlayout16.lds
143@echo " Linking $@"
144$(Q)$(LD) -T $(OUT)romlayout16.lds $< -o $@
145
146$(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds
147@echo " Linking $@"
148$(Q)$(LD) -T $(OUT)romlayout32seg.lds $< -o $@
149
150$(OUT)rom.o: $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds
151@echo " Linking $@"
152$(Q)$(LD) -T $(OUT)romlayout32flat.lds $(OUT)rom16.strip.o $(OUT)rom32seg.strip.o $(OUT)code32flat.o -o $@
153
154$(OUT)bios.bin.elf $(OUT)bios.bin: $(OUT)rom.o tools/checkrom.py
155@echo " Prepping $@"
156$(Q)$(OBJDUMP) -thr $< > $<.objdump
157$(Q)$(OBJCOPY) -O binary $< $(OUT)bios.bin.raw
158$(Q)./tools/checkrom.py $<.objdump $(OUT)bios.bin.raw $(OUT)bios.bin
159$(Q)$(STRIP) -R .comment $< -o $(OUT)bios.bin.elf
160
161
162################ VGA build rules
163
164# VGA src files
165SRCVGA=src/output.c src/util.c vgasrc/vga.c vgasrc/vgafb.c vgasrc/vgaio.c \
166 vgasrc/vgatables.c vgasrc/vgafonts.c vgasrc/clext.c
167
168$(OUT)vgaccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S -Isrc, $(SRCVGA),$@)
169
170$(OUT)vgalayout16.o: vgaentry.S $(OUT)vgaccode.16.s $(OUT)asm-offsets.h
171@echo " Compiling (16bit) $@"
172$(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ -Isrc $< -o $@
173
174$(OUT)vgarom.o: $(OUT)vgalayout16.o $(OUT)vgalayout.lds
175@echo " Linking $@"
176$(Q)$(LD) --gc-sections -T $(OUT)vgalayout.lds $(OUT)vgalayout16.o -o $@
177
178$(OUT)vgabios.bin.raw: $(OUT)vgarom.o
179@echo " Extracting binary $@"
180$(Q)$(OBJCOPY) -O binary $< $@
181
182$(OUT)vgabios.bin: $(OUT)vgabios.bin.raw tools/buildrom.py
183@echo " Finalizing rom $@"
184$(Q)./tools/buildrom.py $< $@
185
186####### dsdt build rules
187src/%.hex: src/%.dsl
188@echo "Compiling DSDT"
189$(Q)cpp -P $< > $(OUT)$*.dsl.i
190$(Q)iasl -tc -p $(OUT)$* $(OUT)$*.dsl.i
191$(Q)cp $(OUT)$*.hex $@
192
193$(OUT)ccode32flat.o: src/acpi-dsdt.hex
194
195####### Generic rules
196clean:
197$(Q)rm -rf $(OUT)
198
199$(OUT):
200$(Q)mkdir $@
201
202-include $(OUT)*.d

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