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1f6ec4b29e
...and max flash offset
The mtdsplit parser was recently refactored
to allow the kernel to have custom image header magic.
Let's also do this for the lzma-loader
For example:
When implemented together,
this allows the kernel to "appear" to be a rootfs
by OEM software in order to write an image
that is actually kernel + rootfs.
At the same time,
it would boot to openwrt normally
by setting the same magic in DTS.
Both of the variables
have a default value that is unchanged
when not defined in the makefiles
This has no effect on the size of the loader
when lzma compressed.
Signed-off-by: Michael Pratt <mcpratt@pm.me>
(cherry picked from commit 1b8bd17c2d)
73 lines
1.7 KiB
Makefile
73 lines
1.7 KiB
Makefile
#
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# Copyright (C) 2011 OpenWrt.org
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# Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk
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LZMA_TEXT_START := 0x81800000
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LOADADDR := 0x80060000
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LOADER := loader.bin
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LOADER_NAME := $(basename $(notdir $(LOADER)))
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LOADER_DATA :=
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KERNEL_MAGIC :=
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TARGET_DIR :=
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FLASH_OFFS :=
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FLASH_MAX :=
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BOARD :=
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ifeq ($(TARGET_DIR),)
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TARGET_DIR := $(KDIR)
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endif
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LOADER_BIN := $(TARGET_DIR)/$(LOADER_NAME).bin
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LOADER_GZ := $(TARGET_DIR)/$(LOADER_NAME).gz
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LOADER_ELF := $(TARGET_DIR)/$(LOADER_NAME).elf
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PKG_NAME := lzma-loader
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PKG_BUILD_DIR := $(KDIR)/$(PKG_NAME)
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.PHONY : loader-compile loader.bin loader.elf loader.gz
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$(PKG_BUILD_DIR)/.prepared:
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mkdir $(PKG_BUILD_DIR)
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$(CP) ./src/* $(PKG_BUILD_DIR)/
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touch $@
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loader-compile: $(PKG_BUILD_DIR)/.prepared
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$(MAKE) -C $(PKG_BUILD_DIR) CROSS_COMPILE="$(TARGET_CROSS)" \
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LZMA_TEXT_START=$(LZMA_TEXT_START) \
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LOADADDR=$(LOADADDR) \
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LOADER_DATA=$(LOADER_DATA) \
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KERNEL_MAGIC=$(KERNEL_MAGIC) \
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FLASH_OFFS=$(FLASH_OFFS) \
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FLASH_MAX=$(FLASH_MAX) \
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BOARD="$(BOARD)" \
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clean all
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loader.gz: $(PKG_BUILD_DIR)/loader.bin
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# Workaround for buggy bootloaders: Some devices
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# (TP-Link TL-WR1043ND v1) don't work correctly when
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# the uncompressed loader is too small (probably a cache
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# invalidation issue)
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dd if=$< bs=512K conv=sync | gzip -nc9 > $(LOADER_GZ)
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loader.elf: $(PKG_BUILD_DIR)/loader.elf
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$(CP) $< $(LOADER_ELF)
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loader.bin: $(PKG_BUILD_DIR)/loader.bin
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$(CP) $< $(LOADER_BIN)
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download:
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prepare: $(PKG_BUILD_DIR)/.prepared
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compile: loader-compile
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install:
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clean:
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rm -rf $(PKG_BUILD_DIR)
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