mirror of https://github.com/hak5/openwrt-owl.git
brcm63xx: use relocate to move the kernel back to start of ram
Appearently the kernel only uses kernel above it, so moving it to an higher address causes a lot of unavailable memory (#19327). Also move the on-flash kernel to 0x80a0000, as newer CFEs don't like uncompressing there (net-booting an ELF kernel is fine, though). Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 45164owl
Jonas Gorski
parent
8353a3bd45
commit
d8ba40cfcd
|
|
@ -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)))
|
||||
|
|
|
|||
|
|
@ -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
|
||||
Loading…
Reference in New Issue