9 # Additional options that you can specify with make OPTS="..."
10 # (these only apply to boot0.S)
12 # -DVOLUME_SERIAL support volume serial number (NT, XP, Vista)
13 # -DSIO do I/O using COM1:
14 # -DPXE fallback to INT18/PXE with F6
15 # -DCHECK_DRIVE enable checking drive number
16 # -DONLY_F_KEYS accept only Fx keys in console
17 # -DTEST print drive number on entry
19 OPTS ?= -DVOLUME_SERIAL -DPXE
22 # Flags used in the boot0.S code:
23 # 0x0f all valid partitions enabled.
24 # 0x80 'packet', use BIOS EDD (LBA) extensions instead of CHS
25 # to read from disk. boot0.S does not check that the extensions
26 # are supported, but all modern BIOSes should have them.
27 # 0x40 'noupdate', disable writing boot0 back to disk so that
28 # the current selection is not preserved across reboots.
29 # 0x20 'setdrv', override the drive number supplied by the bios
30 # with the one in the boot sector.
33 BOOT_BOOT0_FLAGS?= 0x8f
35 # The number of timer ticks to wait for a keypress before assuming the default
36 # selection. Since there are 18.2 ticks per second, the default value of
37 # 0xb6 (182d) corresponds to 10 seconds.
38 BOOT_BOOT0_TICKS?= 0xb6
40 # The base address that we the boot0 code to to run it. Don't change this
41 # unless you are glutton for punishment.
42 BOOT_BOOT0_ORG?= 0x600
44 # Comm settings for boot0sio.
46 # 7-5 data rate (110,150,300,600,1200,2400,4800,9600 bps)
47 # 4-3 parity (00 or 10 = none, 01 = odd, 11 = even)
48 # 2 stop bits (set = 2, clear = 1)
49 # 1-0 data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8)
50 .if !defined(BOOT_BOOT0_COMCONSOLE_SPEED)
51 BOOT_COMCONSOLE_SPEED?= 9600
52 .if ${BOOT_COMCONSOLE_SPEED} == 9600
53 BOOT_BOOT0_COMCONSOLE_SPEED= "7 << 5 + 3"
54 .elif ${BOOT_COMCONSOLE_SPEED} == 4800
55 BOOT_BOOT0_COMCONSOLE_SPEED= "6 << 5 + 3"
56 .elif ${BOOT_COMCONSOLE_SPEED} == 2400
57 BOOT_BOOT0_COMCONSOLE_SPEED= "5 << 5 + 3"
58 .elif ${BOOT_COMCONSOLE_SPEED} == 1200
59 BOOT_BOOT0_COMCONSOLE_SPEED= "4 << 5 + 3"
60 .elif ${BOOT_COMCONSOLE_SPEED} == 600
61 BOOT_BOOT0_COMCONSOLE_SPEED= "3 << 5 + 3"
62 .elif ${BOOT_COMCONSOLE_SPEED} == 300
63 BOOT_BOOT0_COMCONSOLE_SPEED= "2 << 5 + 3"
64 .elif ${BOOT_COMCONSOLE_SPEED} == 150
65 BOOT_BOOT0_COMCONSOLE_SPEED= "1 << 5 + 3"
66 .elif ${BOOT_COMCONSOLE_SPEED} == 110
67 BOOT_BOOT0_COMCONSOLE_SPEED= "0 << 5 + 3"
69 BOOT_BOOT0_COMCONSOLE_SPEED= "7 << 5 + 3"
73 CFLAGS+=-DFLAGS=${BOOT_BOOT0_FLAGS} \
74 -DTICKS=${BOOT_BOOT0_TICKS} \
75 -DCOMSPEED=${BOOT_BOOT0_COMCONSOLE_SPEED}
77 LDFLAGS=-e start -Ttext ${BOOT_BOOT0_ORG} -Wl,-N,-S,--oformat,binary
79 .include <bsd.prog.mk>
81 # XXX: clang integrated-as doesn't grok .codeNN directives yet
82 CFLAGS.boot0.S= ${CLANG_NO_IAS}
83 CFLAGS.boot0ext.S= ${CLANG_NO_IAS}
84 CFLAGS+= ${CFLAGS.${.IMPSRC:T}}