diff options
Diffstat (limited to 'sys/boot/i386/boot0')
-rw-r--r-- | sys/boot/i386/boot0/Makefile | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/sys/boot/i386/boot0/Makefile b/sys/boot/i386/boot0/Makefile index a40e780..92bba82 100644 --- a/sys/boot/i386/boot0/Makefile +++ b/sys/boot/i386/boot0/Makefile @@ -8,24 +8,33 @@ BINMODE= 444 M4?= m4 -# update, packet mode, and all slices enabled by default -B0FLAGS=0x8f -B0TICKS=0xb6 +# 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?= 0x8f -ORG= 0x600 +# 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 boot0: boot0.o .if ${OBJFORMAT} == aout - ${LD} -N -s -T ${ORG} -o boot0.out boot0.o + ${LD} -N -s -T ${BOOT_BOOT0_ORG} -o boot0.out boot0.o dd if=boot0.out of=${.TARGET} ibs=32 skip=1 .else - ${LD} -N -e start -Ttext ${ORG} -o boot0.out boot0.o + ${LD} -N -e start -Ttext ${BOOT_BOOT0_ORG} -o boot0.out boot0.o objcopy -S -O binary boot0.out ${.TARGET} .endif boot0.o: boot0.s - ${AS} ${AFLAGS} --defsym FLAGS=${B0FLAGS} --defsym TICKS=${B0TICKS} \ - ${.IMPSRC} -o ${.TARGET} + ${AS} ${AFLAGS} --defsym FLAGS=${BOOT_BOOT0_FLAGS} \ + --defsym TICKS=${BOOT_BOOT0_TICKS} ${.IMPSRC} -o ${.TARGET} CLEANFILES+= boot0.out boot0.o |