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cf2a5e0bb4
Add support for generating kernel images in the Flattened Image Tree
(.itb) format as supported by U-Boot. This format is essentially a
Flattened Device Tree binary containing images (kernels, DTBs, ramdisks)
and configurations which link those images together. The big advantages
of FIT images over the uImage format are:
- We can include FDTs in the kernel image in a way that the bootloader
can extract it & manipulate it before providing it to the kernel.
Thus we can ship FDTs as part of the kernel giving us the advantages
of being able to develop & maintain the DT within the kernel tree,
but also have the benefits of the bootloader being able to
manipulate the FDT. Example uses for this would be to inject the
kernel command line into the chosen node, or to fill in the correct
memory size.
- We can include multiple configurations in a single kernel image.
This means that a single FIT image can, given appropriate
bootloaders, be booted on different boards with the bootloader
selecting an appropriate configuration & providing the correct FDT
to the kernel.
- We can support a multitude of hashes over the data.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14352/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
160 lines
4.4 KiB
Makefile
160 lines
4.4 KiB
Makefile
#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1995, 1998, 2001, 2002 by Ralf Baechle
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# Copyright (C) 2004 Maciej W. Rozycki
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#
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#
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# Some DECstations need all possible sections of an ECOFF executable
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#
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ifdef CONFIG_MACH_DECSTATION
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e2eflag := -a
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endif
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#
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# Drop some uninteresting sections in the kernel.
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# This is only relevant for ELF kernels but doesn't hurt a.out
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#
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drop-sections := .reginfo .mdebug .comment .note .pdr .options .MIPS.options
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strip-flags := $(addprefix --remove-section=,$(drop-sections))
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hostprogs-y := elf2ecoff
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suffix-y := bin
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suffix-$(CONFIG_KERNEL_BZIP2) := bz2
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suffix-$(CONFIG_KERNEL_GZIP) := gz
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suffix-$(CONFIG_KERNEL_LZMA) := lzma
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suffix-$(CONFIG_KERNEL_LZO) := lzo
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targets := vmlinux.ecoff
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quiet_cmd_ecoff = ECOFF $@
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cmd_ecoff = $(obj)/elf2ecoff $(VMLINUX) $@ $(e2eflag)
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$(obj)/vmlinux.ecoff: $(obj)/elf2ecoff $(VMLINUX) FORCE
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$(call if_changed,ecoff)
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targets += vmlinux.bin
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quiet_cmd_bin = OBJCOPY $@
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cmd_bin = $(OBJCOPY) -O binary $(strip-flags) $(VMLINUX) $@
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$(obj)/vmlinux.bin: $(VMLINUX) FORCE
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$(call if_changed,bin)
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targets += vmlinux.srec
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quiet_cmd_srec = OBJCOPY $@
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cmd_srec = $(OBJCOPY) -S -O srec $(strip-flags) $(VMLINUX) $@
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$(obj)/vmlinux.srec: $(VMLINUX) FORCE
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$(call if_changed,srec)
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UIMAGE_LOADADDR = $(VMLINUX_LOAD_ADDRESS)
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UIMAGE_ENTRYADDR = $(VMLINUX_ENTRY_ADDRESS)
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#
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# Compressed vmlinux images
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#
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extra-y += vmlinux.bin.bz2
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extra-y += vmlinux.bin.gz
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extra-y += vmlinux.bin.lzma
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extra-y += vmlinux.bin.lzo
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$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
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$(call if_changed,bzip2)
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$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,gzip)
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$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
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$(call if_changed,lzma)
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$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
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$(call if_changed,lzo)
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#
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# Compressed u-boot images
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#
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targets += uImage
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targets += uImage.bin
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targets += uImage.bz2
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targets += uImage.gz
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targets += uImage.lzma
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targets += uImage.lzo
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$(obj)/uImage.bin: $(obj)/vmlinux.bin FORCE
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$(call if_changed,uimage,none)
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$(obj)/uImage.bz2: $(obj)/vmlinux.bin.bz2 FORCE
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$(call if_changed,uimage,bzip2)
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$(obj)/uImage.gz: $(obj)/vmlinux.bin.gz FORCE
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$(call if_changed,uimage,gzip)
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$(obj)/uImage.lzma: $(obj)/vmlinux.bin.lzma FORCE
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$(call if_changed,uimage,lzma)
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$(obj)/uImage.lzo: $(obj)/vmlinux.bin.lzo FORCE
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$(call if_changed,uimage,lzo)
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$(obj)/uImage: $(obj)/uImage.$(suffix-y)
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@ln -sf $(notdir $<) $@
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@echo ' Image $@ is ready'
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#
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# Flattened Image Tree (.itb) images
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#
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targets += vmlinux.itb
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targets += vmlinux.gz.itb
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targets += vmlinux.bz2.itb
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targets += vmlinux.lzma.itb
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targets += vmlinux.lzo.itb
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quiet_cmd_cpp_its_S = ITS $@
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cmd_cpp_its_S = $(CPP) $(cpp_flags) -P -C -o $@ $< \
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-DKERNEL_NAME="\"Linux $(KERNELRELEASE)\"" \
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-DVMLINUX_BINARY="\"$(3)\"" \
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-DVMLINUX_COMPRESSION="\"$(2)\"" \
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-DVMLINUX_LOAD_ADDRESS=$(VMLINUX_LOAD_ADDRESS) \
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-DVMLINUX_ENTRY_ADDRESS=$(VMLINUX_ENTRY_ADDRESS)
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$(obj)/vmlinux.its: $(srctree)/arch/mips/$(PLATFORM)/vmlinux.its.S FORCE
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$(call if_changed_dep,cpp_its_S,none,vmlinux.bin)
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$(obj)/vmlinux.gz.its: $(srctree)/arch/mips/$(PLATFORM)/vmlinux.its.S FORCE
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$(call if_changed_dep,cpp_its_S,gzip,vmlinux.bin.gz)
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$(obj)/vmlinux.bz2.its: $(srctree)/arch/mips/$(PLATFORM)/vmlinux.its.S FORCE
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$(call if_changed_dep,cpp_its_S,bzip2,vmlinux.bin.bz2)
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$(obj)/vmlinux.lzma.its: $(srctree)/arch/mips/$(PLATFORM)/vmlinux.its.S FORCE
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$(call if_changed_dep,cpp_its_S,lzma,vmlinux.bin.lzma)
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$(obj)/vmlinux.lzo.its: $(srctree)/arch/mips/$(PLATFORM)/vmlinux.its.S FORCE
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$(call if_changed_dep,cpp_its_S,lzo,vmlinux.bin.lzo)
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quiet_cmd_itb-image = ITB $@
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cmd_itb-image = \
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env PATH="$(objtree)/scripts/dtc:$(PATH)" \
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$(CONFIG_SHELL) $(MKIMAGE) \
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-D "-I dts -O dtb -p 500 \
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--include $(objtree)/arch/mips \
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--warning no-unit_address_vs_reg" \
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-f $(2) $@
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$(obj)/vmlinux.itb: $(obj)/vmlinux.its $(obj)/vmlinux.bin FORCE
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$(call if_changed,itb-image,$<)
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$(obj)/vmlinux.gz.itb: $(obj)/vmlinux.gz.its $(obj)/vmlinux.bin.gz FORCE
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$(call if_changed,itb-image,$<)
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$(obj)/vmlinux.bz2.itb: $(obj)/vmlinux.bz2.its $(obj)/vmlinux.bin.bz2 FORCE
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$(call if_changed,itb-image,$<)
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$(obj)/vmlinux.lzma.itb: $(obj)/vmlinux.lzma.its $(obj)/vmlinux.bin.lzma FORCE
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$(call if_changed,itb-image,$<)
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$(obj)/vmlinux.lzo.itb: $(obj)/vmlinux.lzo.its $(obj)/vmlinux.bin.lzo FORCE
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$(call if_changed,itb-image,$<)
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