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# $FreeBSD$
PROG?= boot0
STRIP=
BINMODE=${NOBINMODE}
NO_MAN=
SRCS= ${PROG}.S
# Additional options that you can specify with make OPTS="..."
# (these only apply to boot0.S)
#
# -DVOLUME_SERIAL support volume serial number (NT, XP, Vista)
# -DSIO do I/O using COM1:
# -DPXE fallback to INT18/PXE with F6
# -DCHECK_DRIVE enable checking drive number
# -DONLY_F_KEYS accept only Fx keys in console
# -DTEST print drive number on entry
#
OPTS ?= -DVOLUME_SERIAL -DPXE
CFLAGS += ${OPTS}
# Flags used in the boot0.S code:
# 0x0f all valid partitions enabled.
# 0x80 'packet', use BIOS EDD (LBA) extensions instead of CHS
# to read from disk. boot0.S does not check that the extensions
# are supported, but all modern BIOSes should have them.
# 0x40 'noupdate', disable writing boot0 back to disk so that
# the current selection is not preserved across reboots.
# 0x20 'setdrv', override the drive number supplied by the bios
# with the one in the boot sector.
# Default boot flags:
BOOT_BOOT0_FLAGS?= 0x8f
# 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.
# Bit(s) Description
# 7-5 data rate (110,150,300,600,1200,2400,4800,9600 bps)
# 4-3 parity (00 or 10 = none, 01 = odd, 11 = even)
# 2 stop bits (set = 2, clear = 1)
# 1-0 data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8)
.if !defined(BOOT_BOOT0_COMCONSOLE_SPEED)
BOOT_COMCONSOLE_SPEED?= 9600
.if ${BOOT_COMCONSOLE_SPEED} == 9600
BOOT_BOOT0_COMCONSOLE_SPEED= "7 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 4800
BOOT_BOOT0_COMCONSOLE_SPEED= "6 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 2400
BOOT_BOOT0_COMCONSOLE_SPEED= "5 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 1200
BOOT_BOOT0_COMCONSOLE_SPEED= "4 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 600
BOOT_BOOT0_COMCONSOLE_SPEED= "3 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 300
BOOT_BOOT0_COMCONSOLE_SPEED= "2 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 150
BOOT_BOOT0_COMCONSOLE_SPEED= "1 << 5 + 3"
.elif ${BOOT_COMCONSOLE_SPEED} == 110
BOOT_BOOT0_COMCONSOLE_SPEED= "0 << 5 + 3"
.else
BOOT_BOOT0_COMCONSOLE_SPEED= "7 << 5 + 3"
.endif
.endif
CFLAGS+=-DFLAGS=${BOOT_BOOT0_FLAGS} \
-DTICKS=${BOOT_BOOT0_TICKS} \
-DCOMSPEED=${BOOT_BOOT0_COMCONSOLE_SPEED}
LDFLAGS=-e start -Ttext ${BOOT_BOOT0_ORG} -Wl,-N,-S,--oformat,binary
.include <bsd.prog.mk>
# XXX: clang integrated-as doesn't grok .codeNN directives yet
CFLAGS.boot0.S= ${CLANG_NO_IAS}
CFLAGS.boot0ext.S= ${CLANG_NO_IAS}
CFLAGS+= ${CFLAGS.${.IMPSRC:T}}
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