Bug#810828: flash-kernel: update kernel address for Linkstation LS-WTGL
On Sun, Jan 24, 2016 at 1:28 AM, Roger Shimizu <rogershimizu@gmail.com> wrote:
> On Sat, Jan 23, 2016 at 7:17 AM, Martin Michlmayr <tbm@cyrius.com> wrote:
>> Your patch sets the kernel load address to 0x00c08000. So u-boot will
>> still load the kernel to 0x00100000 but then (I guess) it's
>> uncompressed at 0x00c08000. The problem is that 0x00c08000 is only 4
>> MB after the start of the ramdisk (0x00800000), which doesn't leave a
>> lot of space for the ramdisk.
>>
>> You can change initramfs-tools from MODULES=dep to MODULES=most,
>> generate and I suspect it wouldn't boot.
>>
>> Can you try if something like 0x01a08000 works?
>>
>> BTW, I assume we need to change this for all Linkstation devices.
>
> I only pathced LS-WTGL because it's the only device I can boot with
> the change to 0x00c08000.
> I don't have other orion5x device, so I tested on a few kirkwood based
> Linkstation but all failed with this kinda of trick.
>
> Now it's cleared, as you said, 0x00c08000 is too low that big initrd
> may over-write to its address.
> I tried 0x01a08000, yes, my kirkwood devices boot okay, but still have
> the following error in dmesg:
>
> [ 0.361974] Unpacking initramfs...
> [ 0.884688] Initramfs unpacking failed: junk in compressed archive
>
> the initrd I used to test is 3.4M initramfs initrd.
> And it's 7.9M after gunzip.
>
> Indeed, I have no clue why initramfs complain there's junk, since
> kernel already set to higher address as 0x01a08000.
Now I know (or partly know) why initramfs complain there's junk, it's
because there's in a kernel param "initrd=0x00800040,12M".
After removing that kernel param, the kernel stops complaining, which
proves change kernel address to 0x01a00000 is fine.
Since the kernel param "initrd=0x00800040,12M" is from stock firmware,
and actually does no harm except the "there's junk" kmsg, I decide to
leave it alone.
So here's the patch to all Linkstation devices.
I've confirmed it's working well on various orion5x and kirkwood based
Linkstation devices, including LS-GL (device tree based), LS-WTGL,
LS-VL and LS-WXL.
I'll push this commit to git repo later. Thank you!
Cheers,
--
Roger Shimizu, GMT +9 Tokyo
PGP/GPG: 17B3ACB1
From 172a0aec5ab9809945a27c1fc17832cfaa6fd1e7 Mon Sep 17 00:00:00 2001
From: Roger Shimizu <rogershimizu@gmail.com>
Date: Wed, 13 Jan 2016 01:45:44 +0900
Subject: [PATCH] Update kernel address for Buffalo Linkstation devices machine
db
For Linkstation LS-WTGL boots fine with linux-image-4.3, but fails with
linux-image-4.4. Deep research reveals that the initrd/initramfs space,
starts from 0x00800000, may be overwritten by kernel extraction by
default configuration.
So the fix is to move the target address of kernel image extraction
address from 0x00008000 to 0x01a00000.
Since initrd/initramfs is firstly placed from 0x00800000 by u-boot,
in this way, 18M space, from 0x00800000 to 0x01a00000, can be used
by initrd/initramfs, which is enough for case like MODULES=most for
initramfs-tools.
This fix has been confirmed working well on various orion5x and kirkwood
based Linkstation devices, including LS-GL (device tree based), LS-WTGL,
LS-VL and LS-WXL. Therefore, I applied to all Linkstation devices.
Signed-off-by: Roger Shimizu <rogershimizu@gmail.com>
---
db/all.db | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/db/all.db b/db/all.db
index 3f1dfcd..6c76653 100644
--- a/db/all.db
+++ b/db/all.db
@@ -49,7 +49,7 @@ Required-Packages: u-boot-tools
Machine: Buffalo Linkstation LiveV3 (LS-CHL)
Kernel-Flavors: orion5x marvell
Machine-Id: 2913
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -60,7 +60,7 @@ Machine: Buffalo Linkstation LS-CHLv2
Kernel-Flavors: kirkwood marvell
DTB-Id: kirkwood-lschlv2.dtb
DTB-Append: yes
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -72,7 +72,7 @@ Machine: Buffalo Linkstation LS-WTGL
Kernel-Flavors: orion5x marvell
DTB-Id: orion5x-linkstation-lswtgl.dtb
DTB-Append: yes
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -83,7 +83,7 @@ Machine: Buffalo Linkstation LS-WVL/VL
Kernel-Flavors: kirkwood marvell
DTB-Id: kirkwood-lswvl.dtb
DTB-Append: yes
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -94,7 +94,7 @@ Machine: Buffalo Linkstation LS-WXL/WSXL
Kernel-Flavors: kirkwood marvell
DTB-Id: kirkwood-lswxl.dtb
DTB-Append: yes
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -105,7 +105,7 @@ Machine: Buffalo Linkstation LS-XHL
Kernel-Flavors: kirkwood marvell
DTB-Id: kirkwood-lsxhl.dtb
DTB-Append: yes
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -119,7 +119,7 @@ Kernel-Flavors: orion5x marvell
DTB-Append-From: 4.3
DTB-Id: orion5x-lswsgl.dtb
Machine-Id: 1858
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -129,7 +129,7 @@ Bootloader-Sets-Incorrect-Root: yes
Machine: Buffalo Linkstation Pro/Live
Kernel-Flavors: orion5x marvell
Machine-Id: 1585
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
@@ -139,7 +139,7 @@ Bootloader-Sets-Incorrect-Root: yes
Machine: Buffalo/Revogear Kurobox Pro
Kernel-Flavors: orion5x marvell
Machine-Id: 1509
-U-Boot-Kernel-Address: 0x00008000
+U-Boot-Kernel-Address: 0x01a00000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage.buffalo
Boot-Initrd-Path: /boot/initrd.buffalo
--
2.1.4
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