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# $FreeBSD$
.include <bsd.init.mk>
FILES= boot boot1 boot2
NM?= nm
# A value of 0x80 enables LBA support.
BOOT_BOOT1_FLAGS?= 0x80
BOOT_COMCONSOLE_PORT?= 0x3f8
BOOT_COMCONSOLE_SPEED?= 9600
B2SIOFMT?= 0x3
REL1= 0x700
ORG1= 0x7c00
ORG2= 0x2000
# Decide level of UFS support.
BOOT2_UFS?= UFS1_AND_UFS2
#BOOT2_UFS?= UFS2_ONLY
#BOOT2_UFS?= UFS1_ONLY
CFLAGS+=-fomit-frame-pointer \
-mrtd \
-mregparm=3 \
-D${BOOT2_UFS} \
-DFLAGS=${BOOT_BOOT1_FLAGS} \
-DSIOPRT=${BOOT_COMCONSOLE_PORT} \
-DSIOFMT=${B2SIOFMT} \
-DSIOSPD=${BOOT_COMCONSOLE_SPEED} \
-I${LDRSRC} \
-I${BTXLIB} -I. \
-Wall -Waggregate-return -Wbad-function-cast -Wno-cast-align \
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
-Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings \
-Winline
CFLAGS.gcc+= -Os \
-fno-asynchronous-unwind-tables \
--param max-inline-insns-single=100
.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} <= 40201
CFLAGS.gcc+= -mno-align-long-strings
.endif
CFLAGS.clang+= -Oz ${CLANG_OPT_SMALL}
LD_FLAGS+=${LD_FLAGS_BIN}
CLEANFILES= boot
boot: boot1 boot2
cat boot1 boot2 > boot
CLEANFILES+= boot1 boot1.out boot1.o
boot1: boot1.out
${OBJCOPY} -S -O binary boot1.out ${.TARGET}
boot1.out: boot1.o
${LD} ${LD_FLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
CLEANFILES+= boot2 boot2.ld boot2.ldr boot2.bin boot2.out boot2.o \
boot2.h sio.o
BOOT2SIZE= 7680
boot2: boot2.ld
@set -- `ls -l ${.ALLSRC}`; x=$$((${BOOT2SIZE}-$$5)); \
echo "$$x bytes available"; test $$x -ge 0
${DD} if=${.ALLSRC} of=${.TARGET} obs=${BOOT2SIZE} conv=osync
boot2.ld: boot2.ldr boot2.bin ${BTXKERN}
btxld -v -E ${ORG2} -f bin -b ${BTXKERN} -l boot2.ldr \
-o ${.TARGET} -P 1 boot2.bin
boot2.ldr:
${DD} if=/dev/zero of=${.TARGET} bs=512 count=1
boot2.bin: boot2.out
${OBJCOPY} -S -O binary boot2.out ${.TARGET}
boot2.out: ${BTXCRT} boot2.o sio.o
${LD} ${LD_FLAGS} -Ttext ${ORG2} -o ${.TARGET} ${.ALLSRC}
SRCS= boot2.c boot2.h
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}` > ${.TARGET}
.if ${MACHINE_CPUARCH} == "amd64"
beforedepend boot2.s: machine
CLEANFILES+= machine
machine: ${SYSDIR}/i386/include .NOMETA
ln -sf ${.ALLSRC} ${.TARGET}
.endif
.include <bsd.prog.mk>
# XXX: clang integrated-as doesn't grok .codeNN directives yet
CFLAGS.boot1.S= ${CLANG_NO_IAS}
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