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mips: boot: add support for self-extracting FIT images (vmlinuz.itb)

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Commit c3e2ee6574 ("MIPS: generic: Add support for zboot") added
support for self-extracting images to Generic MIPS. However, the
intended way to boot Generic MIPS kernels is using FIT Images and
UHI boot protocol, but currently there's no way to make self-extracting
FIT Image (only legacy uzImages).
Add a target for this named "vmlinuz.itb", which will consist of
vmlinuz.bin and selected DT blobs. It will allow to have the advantages
of both UHI and self-extracting images.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Alexander Lobakin 2020-11-01 15:13:01 +00:00 committed by Thomas Bogendoerfer
parent 9d63bcb871
commit a3fb655027
2 changed files with 49 additions and 0 deletions
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1
arch/mips/Makefile
View File

@ -347,6 +347,7 @@ bootz-y += vmlinuz.srec
ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
bootz-y += uzImage.bin
endif
bootz-y += vmlinuz.itb
#
# Some machines like the Indy need 32-bit ELF binaries for booting purposes.

48
arch/mips/boot/compressed/Makefile
View File

@ -172,3 +172,51 @@ targets += ../uzImage.bin
$(objboot)/uzImage.bin: $(objboot)/vmlinuz.bin FORCE
$(call if_changed,uimage,none)
#
# Flattened Image Tree (.itb) image
#
ifeq ($(ADDR_BITS),32)
itb_addr_cells = 1
endif
ifeq ($(ADDR_BITS),64)
itb_addr_cells = 2
endif
targets += ../vmlinuz.its.S
quiet_cmd_its_cat = CAT $@
cmd_its_cat = cat $(real-prereqs) >$@
$(objboot)/vmlinuz.its.S: $(addprefix $(srctree)/arch/mips/$(PLATFORM)/,$(ITS_INPUTS)) FORCE
$(call if_changed,its_cat)
targets += ../vmlinuz.its
quiet_cmd_cpp_its_S = ITS $@
cmd_cpp_its_S = $(CPP) -P -C -o $@ $< \
-DKERNEL_NAME="\"Linux $(KERNELRELEASE)\"" \
-DVMLINUX_BINARY="\"$(2)\"" \
-DVMLINUX_COMPRESSION="\"none\"" \
-DVMLINUX_LOAD_ADDRESS=$(VMLINUZ_LOAD_ADDRESS) \
-DVMLINUX_ENTRY_ADDRESS=$(VMLINUZ_LOAD_ADDRESS) \
-DADDR_BITS=$(ADDR_BITS) \
-DADDR_CELLS=$(itb_addr_cells)
$(objboot)/vmlinuz.its: $(objboot)/vmlinuz.its.S FORCE
$(call if_changed,cpp_its_S,vmlinuz.bin)
targets += ../vmlinuz.itb
quiet_cmd_itb-image = ITB $@
cmd_itb-image = \
env PATH="$(objtree)/scripts/dtc:$(PATH)" \
$(BASH) $(MKIMAGE) \
-D "-I dts -O dtb -p 500 \
--include $(objtree)/arch/mips \
--warning no-unit_address_vs_reg" \
-f $(2) $@
$(objboot)/vmlinuz.itb: $(objboot)/vmlinuz.its $(objboot)/vmlinuz.bin FORCE
$(call if_changed,itb-image,$<)