xref: /freebsd/sys/conf/Makefile.arm (revision d0510c98146f141fcc8f989e8f52625248d7f219)

# Makefile.arm -- with config changes.
# Copyright 1990 W. Jolitz
# Makefile for FreeBSD
#
# This makefile is constructed from a machine description:
#	config machineid
# Most changes should be made in the machine description
#	/sys/arm/conf/``machineid''
# after which you should do
#	 config machineid
# Generic makefile changes should be made in
#	/sys/conf/Makefile.arm
# after which config should be rerun for all machines.
#

# Which version of config(8) is required.
%VERSREQ=	600013

STD8X16FONT?=	iso

.if !defined(S)
.if exists(./@/.)
S=	./@
.else
S=	../../..
.endif
.endif
.include "$S/conf/kern.pre.mk"

INCLUDES+= -I$S/contrib/libfdt -I$S/contrib/device-tree/include -I$S/dts/include

LINUX_DTS_VERSION!=	awk '/freebsd,dts-version/ { sub(/;$$/,"", $$NF); print $$NF }' $S/dts/freebsd-compatible.dts
CFLAGS += -DLINUX_DTS_VERSION=\"${LINUX_DTS_VERSION}\"

.if !defined(DEBUG)
STRIP_FLAGS = -S
.endif

# We don't support gcc's thump interwork stuff, so disable it
CFLAGS.gcc += -mno-thumb-interwork

# We generally don't want fpu instructions in the kernel.
CFLAGS.clang += -mfpu=none

.if !empty(DDB_ENABLED)
CFLAGS += -funwind-tables
.endif

# "makeoptions KERNVIRTADDR=" is now optional, supply the default value.
.if empty(KERNVIRTADDR)
KERNVIRTADDR= 0xc0000000
.endif

# Use a custom SYSTEM_LD command to generate the elf kernel, so we can
# set the text segment start address, and also strip the "arm mapping
# symbols" which have names like $a.0 and $d.2; see the document
# "ELF for the ARM architecture" for more info on the mapping symbols.
SYSTEM_LD= \
	${SYSTEM_LD_BASECMD} \
	    --defsym='text_start=kernbase + SIZEOF_HEADERS' \
	    -o ${.TARGET} ${SYSTEM_OBJS} vers.o; \
	$(OBJCOPY) \
	    --wildcard \
	    --strip-symbol='$$[adt]*' \
	    ${.TARGET}

%BEFORE_DEPEND

%OBJS

%FILES.c

%FILES.s

%FILES.m

%CLEAN

%RULES

.include "$S/conf/kern.post.mk"

# Generate the .bin (no elf headers) kernel
# Copy the kernel to directly executable format (the elf headers are
# stripped and a binary head blob with jump to kernel start address is
# prepended), saving the output in a temp file.
# We also strip arm "marker" symbols which are used only by elf toolchains. Read
# the symbols from kernel.full and pass  them to arm_kernel_boothdr.awk, which
# generates a binary header blob that goes on the front of the stripped kernel.
# Cat the header blob and the temp file together to make the kernel.bin file.
${KERNEL_KO}.bin: ${FULLKERNEL}
	@${OBJCOPY} --wildcard --strip-symbol='$$[adtx]*' \
	    --output-target=binary ${FULLKERNEL} ${.TARGET}.temp
	@{ ${NM} ${FULLKERNEL} | \
	    LC_ALL=C \
	    ${AWK} -f $S/tools/arm_kernel_boothdr.awk -v hdrtype=v7jump && \
	    cat ${.TARGET}.temp; \
	 } > ${.TARGET}
	@rm ${.TARGET}.temp
	@echo "created ${.TARGET} from ${.ALLSRC}"