1ca987d46SWarner LoshPROG?= boot0 2ca987d46SWarner LoshSTRIP= 3ca987d46SWarner LoshBINMODE=${NOBINMODE} 4ca987d46SWarner LoshSRCS= ${PROG}.S 5ca987d46SWarner Losh 6ca987d46SWarner Losh# Additional options that you can specify with make OPTS="..." 7ca987d46SWarner Losh# (these only apply to boot0.S) 8ca987d46SWarner Losh# 9ca987d46SWarner Losh# -DVOLUME_SERIAL support volume serial number (NT, XP, Vista) 10ca987d46SWarner Losh# -DSIO do I/O using COM1: 11ca987d46SWarner Losh# -DPXE fallback to INT18/PXE with F6 12ca987d46SWarner Losh# -DCHECK_DRIVE enable checking drive number 13ca987d46SWarner Losh# -DONLY_F_KEYS accept only Fx keys in console 14ca987d46SWarner Losh# -DTEST print drive number on entry 15ca987d46SWarner Losh# 16ca987d46SWarner LoshOPTS ?= -DVOLUME_SERIAL -DPXE 17ca987d46SWarner LoshCFLAGS += ${OPTS} 18ca987d46SWarner Losh 19ca987d46SWarner Losh# Flags used in the boot0.S code: 20ca987d46SWarner Losh# 0x0f all valid partitions enabled. 21ca987d46SWarner Losh# 0x80 'packet', use BIOS EDD (LBA) extensions instead of CHS 22ca987d46SWarner Losh# to read from disk. boot0.S does not check that the extensions 23ca987d46SWarner Losh# are supported, but all modern BIOSes should have them. 24ca987d46SWarner Losh# 0x40 'noupdate', disable writing boot0 back to disk so that 25ca987d46SWarner Losh# the current selection is not preserved across reboots. 26ca987d46SWarner Losh# 0x20 'setdrv', override the drive number supplied by the bios 27ca987d46SWarner Losh# with the one in the boot sector. 28ca987d46SWarner Losh 29ca987d46SWarner Losh# Default boot flags: 30ca987d46SWarner LoshBOOT_BOOT0_FLAGS?= 0x8f 31ca987d46SWarner Losh 32ca987d46SWarner Losh# The number of timer ticks to wait for a keypress before assuming the default 33ca987d46SWarner Losh# selection. Since there are 18.2 ticks per second, the default value of 34ca987d46SWarner Losh# 0xb6 (182d) corresponds to 10 seconds. 35ca987d46SWarner LoshBOOT_BOOT0_TICKS?= 0xb6 36ca987d46SWarner Losh 37bd5dc94bSJohn Baldwin# The BIOS loads boot0 to the hardcoded address 0x7c00. boot0 copies 38bd5dc94bSJohn Baldwin# itself to this alternate base address before continuing execution so 39bd5dc94bSJohn Baldwin# that next level boot blocks can be loaded at the 0x7c00 address they 40c7f3674fSJohn Baldwin# expect. 41c7f3674fSJohn BaldwinORG= 0x600 42ca987d46SWarner Losh 43ca987d46SWarner Losh# Comm settings for boot0sio. 447ed32283SWarner Losh# 457ed32283SWarner Losh# boot0sio uses BIOS INT $0x14 for serial ports, we can only support these 467ed32283SWarner Losh# baudrates due to INT14's limited interface. In addition, if 477ed32283SWarner Losh# BOOT_BOOT0_COMCONSOLE_SPEED=0, then the baud rate and frame format will remain 487ed32283SWarner Losh# unchanged. Some BIOSes initialize the serial ports to 115200, and this may 497ed32283SWarner Losh# allow boot0sio access at that rate if so. 507ed32283SWarner Losh# 51ca987d46SWarner Losh# Bit(s) Description 52ca987d46SWarner Losh# 7-5 data rate (110,150,300,600,1200,2400,4800,9600 bps) 53ca987d46SWarner Losh# 4-3 parity (00 or 10 = none, 01 = odd, 11 = even) 54ca987d46SWarner Losh# 2 stop bits (set = 2, clear = 1) 55ca987d46SWarner Losh# 1-0 data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8) 56ca987d46SWarner Losh.if !defined(BOOT_BOOT0_COMCONSOLE_SPEED) 57*34d55be0SEd MasteBOOT_COMCONSOLE_SPEED?= 9600 # BIOS interfaces do not support higher rates. 58ca987d46SWarner Losh.if ${BOOT_COMCONSOLE_SPEED} == 9600 59ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "7 << 5 + 3" 60ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 4800 61ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "6 << 5 + 3" 62ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 2400 63ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "5 << 5 + 3" 64ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 1200 65ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "4 << 5 + 3" 66ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 600 67ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "3 << 5 + 3" 68ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 300 69ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "2 << 5 + 3" 70ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 150 71ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "1 << 5 + 3" 72ca987d46SWarner Losh.elif ${BOOT_COMCONSOLE_SPEED} == 110 73ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "0 << 5 + 3" 74ca987d46SWarner Losh.else 75ca987d46SWarner LoshBOOT_BOOT0_COMCONSOLE_SPEED= "7 << 5 + 3" 76ca987d46SWarner Losh.endif 77ca987d46SWarner Losh.endif 78ca987d46SWarner Losh 79ca987d46SWarner LoshCFLAGS+=-DFLAGS=${BOOT_BOOT0_FLAGS} \ 80ca987d46SWarner Losh -DTICKS=${BOOT_BOOT0_TICKS} \ 81ca987d46SWarner Losh -DCOMSPEED=${BOOT_BOOT0_COMCONSOLE_SPEED} 82ca987d46SWarner Losh 83ca987d46SWarner LoshLDFLAGS+=${LDFLAGS_BIN} 84ca987d46SWarner Losh 85ca987d46SWarner Losh.include <bsd.prog.mk> 86