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-rwxr-xr-xtarget/linux/brcm63xx/image/Makefile43
-rw-r--r--target/linux/brcm63xx/patches-3.18/810-BCM63XX-move-kernel-behind-CFE.patch29
2 files changed, 33 insertions, 39 deletions
diff --git a/target/linux/brcm63xx/image/Makefile b/target/linux/brcm63xx/image/Makefile
index c94d06e9d7..9f5d68204c 100755
--- a/target/linux/brcm63xx/image/Makefile
+++ b/target/linux/brcm63xx/image/Makefile
@@ -7,8 +7,9 @@
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/image.mk
-LOADADDR = 0x80800000 # RAM start + 8MB
+LOADADDR = 0x80010000 # RAM start + 64K
KERNEL_ENTRY = $(LOADADDR) # Newer kernels add a jmp to the kernel_entry at the start of the binary
+LOADER_ENTRY = 0x80a00000 # RAM start + 10M, for relocate
RAMSIZE = 0x02000000 # 32MB
LZMA_TEXT_START = 0x81800000 # 32MB - 8MB
@@ -19,6 +20,12 @@ LOADER_MAKEOPTS= \
RAMSIZE=$(RAMSIZE) \
LZMA_TEXT_START=$(LZMA_TEXT_START) \
+RELOCATE_MAKEOPTS= \
+ CACHELINE_SIZE=16 \
+ KERNEL_ADDR=$(KERNEL_ENTRY) \
+ CROSS_COMPILE=$(TARGET_CROSS) \
+ LZMA_TEXT_START=$(LOADER_ENTRY)
+
define rootfspad/jffs2-128k
--align-rootfs
endef
@@ -42,8 +49,8 @@ define Image/Build/CFEDTB
# Generate the tagged image
$(STAGING_DIR_HOST)/bin/imagetag -i $(KDIR)/vmlinux-$(3).lzma.cfe -f $(KDIR)/root.$(1) \
--output $(BIN_DIR)/openwrt-$(2)-$(1)-cfe.bin \
- --boardid $(4) --chipid $(5) --entry $(KERNEL_ENTRY) \
- --load-addr $(LOADADDR) --info1 "-$(call Image/LimitName16,$(2))" \
+ --boardid $(4) --chipid $(5) --entry $(LOADER_ENTRY) \
+ --load-addr $(LOADER_ENTRY) --info1 "-$(call Image/LimitName16,$(2))" \
$(call rootfspad/$(1)) \
--info2 $(1) $(6)
endef
@@ -51,7 +58,7 @@ endef
define Image/Build/OLDCFEDTB
# Generate the tagged image
$(TOPDIR)/scripts/brcmImage.pl -t -p \
- -b $(4) -c $(5) -e $(KERNEL_ENTRY) -a $(LOADADDR) \
+ -b $(4) -c $(5) -e $(LOADER_ENTRY) -a $(LOADER_ENTRY) \
-k $(KDIR)/vmlinux-$(3).lzma.cfe -r $(KDIR)/root.$(1) \
-o $(BIN_DIR)/openwrt-$(2)-$(1)-cfe.bin $(6)
endef
@@ -60,9 +67,9 @@ define Image/Build/SPW303VCFEDTB
# Generate the tagged image
$(STAGING_DIR_HOST)/bin/imagetag -i $(KDIR)/vmlinux-$(3).lzma.cfe -f $(KDIR)/root.$(1) \
--output $(BIN_DIR)/openwrt-$(2)-$(1).tmp \
- --boardid $(4) --chipid $(5) --entry $(KERNEL_ENTRY) \
+ --boardid $(4) --chipid $(5) --entry $(LOADER_ENTRY) \
$(call rootfspad/$(1)) \
- --load-addr $(LOADADDR) $(6)
+ --load-addr $(LOADER_ENTRY) $(6)
# Fix up header
$(STAGING_DIR_HOST)/bin/spw303v -i $(BIN_DIR)/openwrt-$(2)-$(1).tmp \
-o $(BIN_DIR)/openwrt-$(2)-$(1)-cfe-sysupgrade.bin
@@ -73,10 +80,10 @@ endef
define Image/Build/ZYXCFEDTB
# Generate the tagged image
- $(STAGING_DIR_HOST)/bin/imagetag -i $(KDIR)/vmlinux-$(3).lzma.cfe -f $(KDIR)/root.$(1) \
+ $(STAGING_DIR_HOST)/bin/imagetag -i $(KDIR)/vmlinux-relocate-$(3).lzma.cfe -f $(KDIR)/root.$(1) \
--output $(BIN_DIR)/openwrt-$(2)-$(1).tmp \
- --boardid $(4) --chipid $(5) --entry $(KERNEL_ENTRY) \
- --load-addr $(LOADADDR) --info1 "-$(call Image/LimitName16,$(2))" \
+ --boardid $(4) --chipid $(5) --entry $(LOADER_ENTRY) \
+ --load-addr $(LOADER_ENTRY) --info1 "-$(call Image/LimitName16,$(2))" \
$(call rootfspad/$(1)) \
--info2 $(1) $(6)
# Fix up header
@@ -162,16 +169,27 @@ define Image/PrepareLoaderDTB
endef
define Image/PrepareCFELzmaKernel
+ # CFE only allows ~4 MiB for the uncompressed kernels, but uncompressed
+ # kernel might get larger than that, so let CFE unpack and load at a
+ # higher address and make the kernel relocate itself to the expected
+ # location.
+ ( \
+ dd if=$(KDIR)/relocate/loader.bin bs=32 conv=sync && \
+ perl -e '@s = stat("$(KDIR)/vmlinux$(1)"); print pack("N", @s[7])' && \
+ cat $(KDIR)/vmlinux$(1) \
+ ) > $(KDIR)/vmlinux-relocate$(1)
+
# CFE is a LZMA nazi! It took me hours to find out the parameters!
# Also I think lzma has a bug cause it generates different output depending on
# if you use stdin / stdout or not. Use files instead of stdio here, cause
# otherwise CFE will complain and not boot the image.
- $(STAGING_DIR_HOST)/bin/lzma e -d22 -fb64 -a1 $(KDIR)/vmlinux$(1) $(KDIR)/vmlinux$(1).lzma.tmp
+ $(STAGING_DIR_HOST)/bin/lzma e -d22 -fb64 -a1 $(KDIR)/vmlinux-relocate$(1) $(KDIR)/vmlinux$(1).lzma.tmp
# Strip out the length, CFE doesn't like this
dd if=$(KDIR)/vmlinux$(1).lzma.tmp of=$(KDIR)/vmlinux$(1).lzma.cfe bs=5 count=1
dd if=$(KDIR)/vmlinux$(1).lzma.tmp of=$(KDIR)/vmlinux$(1).lzma.cfe ibs=13 obs=5 skip=1 seek=1 conv=notrunc
rm -f $(KDIR)/vmlinux$(1).lzma.tmp
+ rm -f $(KDIR)/vmlinux-relocate$(1)
endef
define Image/PrepareCFELzmaKernelDTB
@@ -182,6 +200,11 @@ define Image/PrepareCFELzmaKernelDTB
endef
define Image/Prepare
+ # build relocation code first
+ rm -rf $(KDIR)/relocate
+ $(CP) ../../generic/image/relocate $(KDIR)
+ $(MAKE) -C $(KDIR)/relocate $(RELOCATE_MAKEOPTS)
+
$(call Image/PrepareCFELzmaKernel,)
$(foreach board,$(sort $(TARGET_$(PROFILE)_DTBS)), $(call Image/PrepareCFELzmaKernelDTB,$(board)))
diff --git a/target/linux/brcm63xx/patches-3.18/810-BCM63XX-move-kernel-behind-CFE.patch b/target/linux/brcm63xx/patches-3.18/810-BCM63XX-move-kernel-behind-CFE.patch
deleted file mode 100644
index b161edbd72..0000000000
--- a/target/linux/brcm63xx/patches-3.18/810-BCM63XX-move-kernel-behind-CFE.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-From b99815f47828214b298178b0d0e2a9f3aae9f24a Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jogo@openwrt.org>
-Date: Sun, 22 Mar 2015 11:49:16 +0100
-Subject: [PATCH] MIPS: BCM63XX: move kernel behind CFE
-
-CFE will load itself to offset 4 MiB (or 6 MiB) in memory occupying a
-bit over one MiB. Traditionally the kernel will get linked to and loaded
-at offset 64k.
-This will pose a problem if the kernel size reaches 4 MiB - 64 kB, as
-CFE will start overwriting itself. This can easily happen by including a
-ramdisk image in the kernel.
-While for net-booted elf kernels this can be worked around by wrapping
-them in a lzma boot loader, on-flash images require the kernel to be
-lzma compressed. This would cause inefficient double compression.
-
-Luckily we have full control over where the kernel will be extracted to
-and the entry point to be called, so move the kernel to behind CFE.
----
- arch/mips/bcm63xx/Platform | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
---- a/arch/mips/bcm63xx/Platform
-+++ b/arch/mips/bcm63xx/Platform
-@@ -4,4 +4,4 @@
- platform-$(CONFIG_BCM63XX) += bcm63xx/
- cflags-$(CONFIG_BCM63XX) += \
- -I$(srctree)/arch/mips/include/asm/mach-bcm63xx/
--load-$(CONFIG_BCM63XX) := 0xffffffff80010000
-+load-$(CONFIG_BCM63XX) := 0xffffffff80800000