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brcm63xx: add working lzma-loader and use it for initramfs

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Add a working lzma loader and use it for generating initramfs kernels
to allow easily netbooting elf kernels on devices with a 4 MiB CFE
size limit.

Based on ar71xx's lzma-loader.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 41940
This commit is contained in:
Jonas Gorski
2014-08-01 21:56:31 +00:00
parent 21845cb45d
commit 701e2a38fe
23 changed files with 1580 additions and 925 deletions
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55
target/linux/brcm63xx/image/lzma-loader/Makefile
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@@ -1,5 +1,6 @@
#
# Copyright (C) 2006 OpenWrt.org
#
# Copyright (C) 2011 OpenWrt.org
# Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@@ -7,27 +8,55 @@
include $(TOPDIR)/rules.mk
LZMA_TEXT_START := 0x80a00000
LOADER := loader.bin
LOADER_NAME := $(basename $(notdir $(LOADER)))
LOADER_DATA :=
TARGET_DIR :=
FLASH_OFFS :=
FLASH_MAX :=
ifeq ($(TARGET_DIR),)
TARGET_DIR := $(KDIR)
endif
LOADER_BIN := $(TARGET_DIR)/$(LOADER_NAME).bin
LOADER_GZ := $(TARGET_DIR)/$(LOADER_NAME).gz
LOADER_ELF := $(TARGET_DIR)/$(LOADER_NAME).elf
PKG_NAME := lzma-loader
PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
PKG_BUILD_DIR := $(KDIR)/$(PKG_NAME)
.PHONY : loader-compile loader.bin loader.elf loader.gz
$(PKG_BUILD_DIR)/.prepared:
mkdir $(PKG_BUILD_DIR)
$(CP) ./src/* $(PKG_BUILD_DIR)/
touch $@
$(PKG_BUILD_DIR)/loader.gz: $(PKG_BUILD_DIR)/.prepared
$(MAKE) -C $(PKG_BUILD_DIR) CC="$(TARGET_CC)" \
LD="$(TARGET_CROSS)ld" CROSS_COMPILE="$(TARGET_CROSS)"
loader-compile: $(PKG_BUILD_DIR)/.prepared
$(MAKE) -C $(PKG_BUILD_DIR) CROSS_COMPILE="$(TARGET_CROSS)" \
LZMA_TEXT_START=$(LZMA_TEXT_START) \
LOADER_DATA=$(LOADER_DATA) \
FLASH_OFFS=$(FLASH_OFFS) \
FLASH_MAX=$(FLASH_MAX) \
clean all
download:
loader.gz: $(PKG_BUILD_DIR)/loader.bin
gzip -nc9 $< > $(LOADER_GZ)
loader.elf: $(PKG_BUILD_DIR)/loader.elf
$(CP) $< $(LOADER_ELF)
loader.bin: $(PKG_BUILD_DIR)/loader.bin
$(CP) $< $(LOADER_BIN)
download:
prepare: $(PKG_BUILD_DIR)/.prepared
compile: $(PKG_BUILD_DIR)/loader.gz
install:
compile: loader-compile
ifneq ($(TARGET),)
install: compile
$(CP) $(PKG_BUILD_DIR)/loader.gz $(PKG_BUILD_DIR)/loader.elf $(TARGET)/
endif
install:
clean:
rm -rf $(PKG_BUILD_DIR)