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# $FreeBSD$
PROG= boot2
NOMAN=
STRIP=
BINDIR?= /boot
BINMODE= 444
CLEANFILES= boot boot1 boot1.out boot1.o \
boot2.ldr boot2.bin boot2.ld boot2.out boot2.o boot2.h \
boot2.s sio.o
NM?= nm
# A value of 0x80 enables LBA support.
B1FLAGS= 0x80
BOOT_COMCONSOLE_PORT?= 0x3f8
BOOT_COMCONSOLE_SPEED?= 9600
B2SIOFMT?= 0x3
.if exists(${.OBJDIR}/../btx)
BTX= ${.OBJDIR}/../btx
.else
BTX= ${.CURDIR}/../btx
.endif
REL1= 0x700
ORG1= 0x7c00
ORG2= 0x2000
# Decide Level of UFS support. UFS1_AND_UFS2 doesn't fit.
# BOOT2_UFS?= UFS2_ONLY
BOOT2_UFS?= UFS1_AND_UFS2
# BOOT2_UFS?= UFS1_ONLY
CFLAGS= -elf -ffreestanding -Os -fno-builtin \
-fno-guess-branch-probability -fomit-frame-pointer\
-mno-align-long-strings \
-mrtd \
-D${BOOT2_UFS} \
-I${.CURDIR}/../../common \
-I${.CURDIR}/../btx/lib -I. \
-Wall -Waggregate-return -Wbad-function-cast -Wcast-align \
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
-Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings
LDFLAGS=-nostdlib -static -N --gc-sections
all: boot1 boot2 boot
boot: boot1 boot2
cat boot1 boot2 > boot
boot1: boot1.out
objcopy -S -O binary boot1.out ${.TARGET}
boot1.out: boot1.o
${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
boot1.o: boot1.s
${CPP} ${CFLAGS} ${.IMPSRC} | \
${AS} ${AFLAGS} --defsym FLAGS=${B1FLAGS} -o ${.TARGET}
boot2.o: boot2.c ${.CURDIR}/../../common/ufsread.c
${CC} ${CFLAGS} -S -o boot2.s.tmp ${.IMPSRC}
sed -e '/align/d' -e '/nop/d' < boot2.s.tmp > boot2.s
rm -f boot2.s.tmp
${AS} ${AFLAGS} -o boot2.o boot2.s
boot2.h: boot1.out
${NM} -t d ${.ALLSRC} | awk '/([0-9])+ T xread/ \
{ x = $$1 - ORG1; \
printf("#define XREADORG %#x\n", REL1 + x) }' \
ORG1=`printf "%d" ${ORG1}` \
REL1=`printf "%d" ${REL1}` > boot2.h
boot2: boot2.ldr boot2.bin ${BTX}/btx/btx
btxld -v -E ${ORG2} -f bin -b ${BTX}/btx/btx -l boot2.ldr \
-o boot2.ld -P 1 boot2.bin
@ls -l boot2.ld | awk '{ x = 7680 - $$5; \
print x " bytes available"; if (x < 0) exit 1 }'
dd if=boot2.ld of=${.TARGET} obs=7680 conv=osync 2>/dev/null
boot2.ldr:
dd if=/dev/zero of=${.TARGET} bs=276 count=1 2>/dev/null
boot2.bin: boot2.out
objcopy -S -O binary boot2.out ${.TARGET}
boot2.out: boot2.o sio.o
${LD} ${LDFLAGS} -Ttext ${ORG2} -o ${.TARGET} \
${BTX}/lib/crt0.o ${.ALLSRC}
boot2.o: boot2.h
sio.o: sio.s
${AS} ${AFLAGS} --defsym SIOPRT=${BOOT_COMCONSOLE_PORT} \
--defsym SIOFMT=${B2SIOFMT} \
--defsym SIOSPD=${BOOT_COMCONSOLE_SPEED} \
${.IMPSRC} -o ${.TARGET}
install:
${INSTALL} -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
boot ${DESTDIR}${BINDIR}/boot
${INSTALL} -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
boot1 ${DESTDIR}${BINDIR}/boot1
${INSTALL} -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
boot2 ${DESTDIR}${BINDIR}/boot2
.include <bsd.prog.mk>
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