Makefile revision 64189 
1# $FreeBSD: head/sys/boot/i386/boot0/Makefile 64187 2000-08-03 09:14:02Z jhb $
2
3PROG=		boot0
4NOMAN=
5STRIP=
6BINDIR?=	/boot
7BINMODE=	444
8
9M4?=	m4
10
11# The default set of flags compiled into boot0.  This enables update (writing
12# the modified boot0 back to disk after running so that the selection made is
13# saved), packet mode (detect and use the BIOS EDD extensions if we try to
14# boot past the 1024 cylinder liimt), and booting from all valid slices.
15BOOT_BOOT0_FLAGS?=	0x8f
16
17# The number of timer ticks to wait for a keypress before assuming the default
18# selection.  Since there are 18.2 ticks per second, the default value of
19# 0xb6 (182d) corresponds to 10 seconds.
20BOOT_BOOT0_TICKS?=	0xb6
21
22# The base address that we the boot0 code to to run it.  Don't change this
23# unless you are glutton for punishment.
24BOOT_BOOT0_ORG?=	0x600
25
26boot0: boot0.o
27.if ${OBJFORMAT} == aout
28	${LD} -N -s -T ${BOOT_BOOT0_ORG} -o boot0.out boot0.o
29	dd if=boot0.out of=${.TARGET} ibs=32 skip=1
30.else
31	${LD} -N -e start -Ttext ${BOOT_BOOT0_ORG} -o boot0.out boot0.o
32	objcopy -S -O binary boot0.out ${.TARGET}
33.endif
34
35boot0.o: boot0.s
36	${AS} ${AFLAGS} --defsym FLAGS=${BOOT_BOOT0_FLAGS} \
37		--defsym TICKS=${BOOT_BOOT0_TICKS} ${.IMPSRC} -o ${.TARGET}
38
39CLEANFILES+= boot0.out boot0.o
40
41.include <bsd.prog.mk>
42