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

# Which version of config(8) is required.
%VERSREQ=	600012

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

LDSCRIPT_NAME?=ldscript.$M
SYSTEM_LD:= ${SYSTEM_LD:$S/conf/${LDSCRIPT_NAME}=${LDSCRIPT_NAME}}
SYSTEM_DEP:= ${SYSTEM_DEP:$S/conf/${LDSCRIPT_NAME}=${LDSCRIPT_NAME}}

KERNLOADADDR?=0x80001000
# This obscure value is defined by CFE for WR160N
# To be changed later
TRAMPLOADADDR?=0x807963c0

# We default to the MIPS32 ISA for O32 and MIPS64 ISA for N64 and N32
# if none is specified in the kernel configuration file.
.if ${MACHINE_ARCH:Mmips64*} != "" || ${MACHINE_ARCH:Mmipsn32*} != ""
ARCH_FLAGS?=-march=mips64
.else
ARCH_FLAGS?=-march=mips32
.endif
ARCH_FLAGS+=-mabi=${MIPS_ABI}
EXTRA_FLAGS=-fno-pic -mno-abicalls -G0 -DKERNLOADADDR=${KERNLOADADDR}
EXTRA_FLAGS+=-${MIPS_ENDIAN}

# We add the -fno-pic flag to kernels because otherwise performance
# is extremely poor, as well as -mno-abicalls to force no ABI usage.
CFLAGS+=${EXTRA_FLAGS} $(ARCH_FLAGS)
TRAMP_ARCH_FLAGS?=$(ARCH_FLAGS)
TRAMP_EXTRA_FLAGS=${EXTRA_FLAGS} ${TRAMP_ARCH_FLAGS}
# Kernel code is always compiled with soft-float on MIPS
TRAMP_EXTRA_FLAGS+=-msoft-float
.if ${MACHINE_ARCH:Mmips64*} != ""
TRAMP_ELFSIZE=64
.else
TRAMP_ELFSIZE=32
.endif

ASM_CFLAGS+=${CFLAGS} -D_LOCORE -DLOCORE

.if !defined(WITHOUT_KERNEL_TRAMPOLINE)
KERNEL_EXTRA=trampoline
KERNEL_EXTRA_INSTALL=${KERNEL_KO}.tramp.bin
trampoline: ${KERNEL_KO}.tramp.bin
${KERNEL_KO}.tramp.bin: ${KERNEL_KO} $S/$M/$M/elf_trampoline.c \
	$S/$M/$M/inckern.S 
	${OBJCOPY} --strip-symbol '$$d' --strip-symbol '$$a' \
		-g --strip-symbol '$$t' ${FULLKERNEL} ${KERNEL_KO}.tmp
	sed -e s/${KERNLOADADDR}/${TRAMPLOADADDR}/ -e s/" + SIZEOF_HEADERS"// \
		 ${LDSCRIPT_NAME} > ${LDSCRIPT_NAME}.tramp.noheader
	${CC} -O -nostdlib -I. -I$S ${TRAMP_EXTRA_FLAGS} ${TRAMP_LDFLAGS} -Xlinker \
		-T -Xlinker ${LDSCRIPT_NAME}.tramp.noheader \
		-DKERNNAME="\"${KERNEL_KO}.tmp\"" -DELFSIZE=${TRAMP_ELFSIZE} \
		-fno-asynchronous-unwind-tables \
		$S/$M/$M/inckern.S $S/$M/$M/elf_trampoline.c \
		-o ${KERNEL_KO}.tramp.elf
	${OBJCOPY} -S -O binary ${KERNEL_KO}.tramp.elf \
		${KERNEL_KO}.tramp.bin
.endif

%BEFORE_DEPEND

%OBJS

%FILES.c

%FILES.s

%FILES.m

%CLEAN

CLEAN+=	${LDSCRIPT_NAME} ${LDSCRIPT_NAME}.tramp.noheader \
	${KERNEL_KO}.tramp.elf ${KERNEL_KO}.tramp.bin

${LDSCRIPT_NAME}: $S/conf/${LDSCRIPT_NAME}
	sed s/KERNLOADADDR/${KERNLOADADDR}/g $S/conf/${LDSCRIPT_NAME} \
		> ${LDSCRIPT_NAME}
%RULES

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