7ed3228323
And thus has a limited range of supported baud rates. Also add that setting BOOT_BOOT0_COMCONSOLE_SPEED=0 will leave it unchanged which sometimes can give you 115200 if the BIOS initialized things outside of the normal BIOS baud rates (which many x86 enbedded-targetted boards do). Sponsored by: Netflix Reviewed by: emaste, manu (earlier versions) Suggestions by: jhb Differential Revision: https://reviews.freebsd.org/D36300
87 lines
2.9 KiB
Makefile
87 lines
2.9 KiB
Makefile
# $FreeBSD$
|
|
|
|
PROG?= boot0
|
|
STRIP=
|
|
BINMODE=${NOBINMODE}
|
|
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 += ${OPTS}
|
|
|
|
# Flags used in the boot0.S code:
|
|
# 0x0f all valid partitions enabled.
|
|
# 0x80 'packet', use BIOS EDD (LBA) extensions instead of CHS
|
|
# to read from disk. boot0.S does not check that the extensions
|
|
# are supported, but all modern BIOSes should have them.
|
|
# 0x40 'noupdate', disable writing boot0 back to disk so that
|
|
# the current selection is not preserved across reboots.
|
|
# 0x20 'setdrv', override the drive number supplied by the bios
|
|
# with the one in the boot sector.
|
|
|
|
# Default boot flags:
|
|
BOOT_BOOT0_FLAGS?= 0x8f
|
|
|
|
# The number of timer ticks to wait for a keypress before assuming the default
|
|
# selection. Since there are 18.2 ticks per second, the default value of
|
|
# 0xb6 (182d) corresponds to 10 seconds.
|
|
BOOT_BOOT0_TICKS?= 0xb6
|
|
|
|
# The base address that we the boot0 code to to run it. Don't change this
|
|
# unless you are glutton for punishment.
|
|
BOOT_BOOT0_ORG?= 0x600
|
|
ORG=${BOOT_BOOT0_ORG}
|
|
|
|
# Comm settings for boot0sio.
|
|
#
|
|
# boot0sio uses BIOS INT $0x14 for serial ports, we can only support these
|
|
# baudrates due to INT14's limited interface. In addition, if
|
|
# BOOT_BOOT0_COMCONSOLE_SPEED=0, then the baud rate and frame format will remain
|
|
# unchanged. Some BIOSes initialize the serial ports to 115200, and this may
|
|
# allow boot0sio access at that rate if so.
|
|
#
|
|
# 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+=${LDFLAGS_BIN}
|
|
|
|
.include <bsd.prog.mk>
|