xref: /freebsd-10.1-release/sys/boot/i386/boot0/Makefile

# $FreeBSD: head/sys/boot/i386/boot0/Makefile 128651 2004-04-25 20:36:44Z obrien $

PROG=	${BOOT}
INTERNALPROG=
FILES=	${BOOT}
NOMAN=
SRCS=	${BOOT}.s

BOOT?=	boot0

# 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

AFLAGS+=--defsym FLAGS=${BOOT_BOOT0_FLAGS} \
	--defsym TICKS=${BOOT_BOOT0_TICKS} \
	--defsym COMSPEED=${BOOT_BOOT0_COMCONSOLE_SPEED}

LDFLAGS=-N -e start -Ttext ${BOOT_BOOT0_ORG} -Wl,-S,--oformat,binary

.include <bsd.prog.mk>