Makefile revision 123302 
1# $FreeBSD: head/sys/boot/i386/boot0/Makefile 123302 2003-12-08 19:02:06Z obrien $
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?=	0xf
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
26${PROG}: ${PROG}.o
27	${LD} -N -e start -Ttext ${BOOT_BOOT0_ORG} -o ${PROG}.out ${PROG}.o
28	objcopy -S -O binary ${PROG}.out ${.TARGET}
29
30${PROG}.o: ${PROG}.s
31	${AS} ${AFLAGS} --defsym FLAGS=${BOOT_BOOT0_FLAGS} \
32		--defsym TICKS=${BOOT_BOOT0_TICKS} ${.IMPSRC} -o ${.TARGET}
33
34CLEANFILES+= ${PROG}.out ${PROG}.o
35
36.include <bsd.prog.mk>
37