xref: /freebsd-10.0-release/sys/boot/i386/boot0/Makefile

# $FreeBSD: head/sys/boot/i386/boot0/Makefile 124179 2004-01-06 18:46:35Z obrien $

PROG?=		boot0
NOMAN=
STRIP=
BINDIR?=	/boot
BINMODE=	444

M4?=	m4

# The default set of flags compiled into boot0.  This enables update (writing
# the modified boot0 back to disk after running so that the selection made is
# saved), packet mode (detect and use the BIOS EDD extensions if we try to
# boot past the 1024 cylinder liimt), and booting from all valid slices.
BOOT_BOOT0_FLAGS?=	0xf

# The number of timer ticks to wait for a keypress before assuming the default
# selection.  Since there are 18.2 ticks per second, the default value of
# 0xb6 (182d) corresponds to 10 seconds.
BOOT_BOOT0_TICKS?=	0xb6

# The base address that we the boot0 code to to run it.  Don't change this
# unless you are glutton for punishment.
BOOT_BOOT0_ORG?=	0x600

# Comm settings for boot0sio.  0xE3 => 9600 8-N-1
# XXX: We should create a build-tool or something to convert BOOT_CONSOLE_SPEED
# and BOOT_COMCONSOLE_PORT into the correct values to define on the build
# command line
BOOT_BOOT0_COMCONSOLE_SPEED?=	0xE3

${PROG}: ${PROG}.o
	${LD} -N -e start -Ttext ${BOOT_BOOT0_ORG} -o ${PROG}.out ${PROG}.o
	objcopy -S -O binary ${PROG}.out ${.TARGET}

${PROG}.o: ${PROG}.s
	${AS} ${AFLAGS} --defsym FLAGS=${BOOT_BOOT0_FLAGS} \
		--defsym TICKS=${BOOT_BOOT0_TICKS} \
		--defsym COMSPEED=${BOOT_BOOT0_COMCONSOLE_SPEED} \
		${.IMPSRC} -o ${.TARGET}

CLEANFILES+= ${PROG}.out ${PROG}.o

.include <bsd.prog.mk>