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# $FreeBSD$
FILES= ${BOOT}
CLEANFILES= ${BOOT} ${BOOT}.out ${BOOT}.o
BOOT?= boot0
# The default set of flags compiled into boot0. This enables update (writing
# the modified boot0 back to disk after running so that the selection made is
# saved), packet mode (detect and use the BIOS EDD extensions if we try to
# boot past the 1024 cylinder liimt), and booting from all valid slices.
BOOT_BOOT0_FLAGS?= 0xf
# The number of timer ticks to wait for a keypress before assuming the default
# selection. Since there are 18.2 ticks per second, the default value of
# 0xb6 (182d) corresponds to 10 seconds.
BOOT_BOOT0_TICKS?= 0xb6
# The base address that we the boot0 code to to run it. Don't change this
# unless you are glutton for punishment.
BOOT_BOOT0_ORG?= 0x600
# Comm settings for boot0sio. 0xE3 => 9600 8-N-1
# XXX: We should create a build-tool or something to convert BOOT_CONSOLE_SPEED
# and BOOT_COMCONSOLE_PORT into the correct values to define on the build
# command line
BOOT_BOOT0_COMCONSOLE_SPEED?= 0xE3
AFLAGS+=--defsym FLAGS=${BOOT_BOOT0_FLAGS} \
--defsym TICKS=${BOOT_BOOT0_TICKS} \
--defsym COMSPEED=${BOOT_BOOT0_COMCONSOLE_SPEED}
${BOOT}: ${BOOT}.out
objcopy -S -O binary ${BOOT}.out ${.TARGET}
${BOOT}.out: ${BOOT}.o
${LD} -N -e start -Ttext ${BOOT_BOOT0_ORG} -o ${.TARGET} ${BOOT}.o
.include <bsd.prog.mk>
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