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UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"
# What CPU vesion are we building for, and crack it open
# as major.minor.rev
CPU_VER=$(subst ",,$(CONFIG_XILINX_MICROBLAZE0_HW_VER) )
CPU_MAJOR=$(shell echo $(CPU_VER) | cut -d '.' -f 1)
CPU_MINOR=$(shell echo $(CPU_VER) | cut -d '.' -f 2)
CPU_REV=$(shell echo $(CPU_VER) | cut -d '.' -f 3)
export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
# Use cpu-related CONFIG_ vars to set compile options.
# Work out HW multipler support. This is icky.
# 1. Spartan2 has no HW multiplers.
# 2. MicroBlaze v3.x always uses them, except in Spartan 2
# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings
ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
ifeq ($(CPU_MAJOR),3)
CPUFLAGS-1 += -mno-xl-soft-mul
else
# USE_HW_MUL can be 0, 1, or 2, defining a heirarchy of HW Mul support.
CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul
endif
endif
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
# The various CONFIG_XILINX cpu features options are integers 0/1/2...
# rather than bools y/n
CFLAGS += $(CPUFLAGS-1)
CFLAGS += $(CPUFLAGS-2)
# r31 holds current when in kernel mode
CFLAGS += -ffixed-r31
LDFLAGS_BLOB := --format binary --oformat elf32-microblaze
LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
head-y := arch/microblaze/kernel/head.o
libs-y += arch/microblaze/lib/ $(LIBGCC)
core-y += arch/microblaze/kernel/ arch/microblaze/mm/ \
arch/microblaze/platform/
boot := arch/$(ARCH)/boot
# defines filename extension depending memory management type
ifeq ($(CONFIG_MMU),)
MMUEXT := -nommu
endif
export MMUEXT
all: linux.bin
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
linux.bin linux.bin.gz: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
define archhelp
echo '* linux.bin - Create raw binary'
echo ' linux.bin.gz - Create compressed raw binary'
endef
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