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Building an allmodconfig kernel fails horribly because of endian mismatch. It turns out that the -mlittle-endian switch was not honored at all as we were using the wrong Kconfig symbol and failing to apply CPUFLAGS to the CFLAGS. Finally, the linker flags did not get set right. This addresses all three of those issues, which now lets me build both big-endian and little-endian kernels for testing. Fixes:428dbf156c("arch: change default endian for microblaze") Fixes:206d3642d8("arch/microblaze: add choice for endianness and update Makefile") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
107 lines
3.4 KiB
Makefile
107 lines
3.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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KBUILD_DEFCONFIG := mmu_defconfig
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ifeq ($(CONFIG_MMU),y)
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UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
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else
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UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"
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endif
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# What CPU vesion are we building for, and crack it open
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# as major.minor.rev
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CPU_VER := $(shell echo $(CONFIG_XILINX_MICROBLAZE0_HW_VER))
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CPU_MAJOR := $(shell echo $(CPU_VER) | cut -d '.' -f 1)
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CPU_MINOR := $(shell echo $(CPU_VER) | cut -d '.' -f 2)
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CPU_REV := $(shell echo $(CPU_VER) | cut -d '.' -f 3)
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export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
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# Use cpu-related CONFIG_ vars to set compile options.
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# The various CONFIG_XILINX cpu features options are integers 0/1/2...
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# rather than bools y/n
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# Work out HW multipler support. This is tricky.
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# 1. Spartan2 has no HW multipliers.
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# 2. MicroBlaze v3.x always uses them, except in Spartan 2
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# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings
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ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
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ifeq ($(CPU_MAJOR),3)
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CPUFLAGS-1 += -mno-xl-soft-mul
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else
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# USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support.
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CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high
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CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul
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endif
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endif
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CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
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CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
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CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
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ifdef CONFIG_CPU_BIG_ENDIAN
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KBUILD_CFLAGS += -mbig-endian
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KBUILD_AFLAGS += -mbig-endian
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LD += -EB
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else
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KBUILD_CFLAGS += -mlittle-endian
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KBUILD_AFLAGS += -mlittle-endian
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LD += -EL
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endif
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CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
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# r31 holds current when in kernel mode
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KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2)
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head-y := arch/microblaze/kernel/head.o
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libs-y += arch/microblaze/lib/
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core-y += arch/microblaze/kernel/
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core-y += arch/microblaze/mm/
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core-$(CONFIG_PCI) += arch/microblaze/pci/
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drivers-$(CONFIG_OPROFILE) += arch/microblaze/oprofile/
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boot := arch/microblaze/boot
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# Are we making a simpleImage.<boardname> target? If so, crack out the boardname
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DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS)))
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ifneq ($(DTB),)
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core-y += $(boot)/dts/
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endif
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# defines filename extension depending memory management type
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ifeq ($(CONFIG_MMU),)
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MMU := -nommu
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endif
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export MMU DTB
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all: linux.bin
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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linux.bin linux.bin.gz linux.bin.ub: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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simpleImage.%: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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define archhelp
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echo '* linux.bin - Create raw binary'
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echo ' linux.bin.gz - Create compressed raw binary'
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echo ' linux.bin.ub - Create U-Boot wrapped raw binary'
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echo ' simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'
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echo ' - stripped elf with fdt blob'
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echo ' simpleImage.<dt>.unstrip - full ELF image with fdt blob'
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echo ' *_defconfig - Select default config from arch/microblaze/configs'
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echo ''
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echo ' Targets with <dt> embed a device tree blob inside the image'
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echo ' These targets support board with firmware that does not'
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echo ' support passing a device tree directly. Replace <dt> with the'
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echo ' name of a dts file from the arch/microblaze/boot/dts/ directory'
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echo ' (minus the .dts extension).'
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endef
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MRPROPER_FILES += $(boot)/simpleImage.*
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