Subject: [PATCH RFC RFT 0/2] ARM: Kirkwood: Synology DT files

From: [email-masked] (Andrew Lunn)
Date: Fri, 10 Jan 2014 15:25:48 +0100

On Sat, Jan 11, 2014 at 12:09:11AM +1000, Ben Peddell wrote:
> On 10/01/14 21:28, Russell King - ARM Linux wrote:
> > On Fri, Jan 10, 2014 at 11:01:06AM +1000, Ben Peddell wrote:
> >> It appears the initrd address in the devicetree structure (which is 
> >> filled in from what is passed by the bootloader when 
> >> CONFIG_ARM_ATAG_DTB_COMPAT is set) is processed _after_ the address in 
> >> the initrd= kernel parameter is processed.
> > 
> > That's wrong.  Kernel parameters should always override what's passed by
> > boot loaders etc.
> 
> In that case, what I saw was a bug - note that this only occurs when
> DeviceTree is enabled:
> 
> 
>          __  __                      _ _
>         |  \/  | __ _ _ ____   _____| | |
>         | |\/| |/ _` | '__\ \ / / _ \ | |
>         | |  | | (_| | |   \ V /  __/ | |
>         |_|  |_|\__,_|_|    \_/ \___|_|_|
>  _   _     ____              _
> | | | |   | __ )  ___   ___ | |_
> | | | |___|  _ \ / _ \ / _ \| __|
> | |_| |___| |_) | (_) | (_) | |_
>  \___/    |____/ \___/ \___/ \__|  ** LOADER **
>  ** MARVELL BOARD: Synology Disk Station LE
> 
> U-Boot 1.1.4 (Jul  6 2010 - 19:26:08) Marvell version: 3.4.4
> 
> U-Boot code: 00600000 -> 0067FFF0  BSS: -> 0068B43C
> 
> Soc: 88F6281 A1 (DDR2)
> CPU running @ 1200Mhz L2 running @ 480Mhz
> SysClock = 400Mhz , TClock = 200Mhz
> 
> DRAM CAS Latency = 6 tRP = 6 tRAS = 18 tRCD=6
> DRAM CS[0] base 0x00000000   size 128MB
> DRAM Total size 128MB  16bit width
> [4096kB at f8000000] Flash:  4 MB
> Addresses 8M - 0M are saved for the U-Boot usage.
> Mem malloc Initialization (8M - 7M): Done
> Using default environment
> 
> 
> CPU : Marvell Feroceon (Rev 1)
> 
> Streaming disabled
> Write allocate disabled
> 
> Module 1 is AUDIO
> 
> USB 0: host mode
> 
> Synology Model: DS211j
> Fan Status: Good
> 
> Net:   egiga0 [PRIME]
> Hit any key to stop autoboot:  0
> Marvell>> setenv ipaddr 192.168.200.62
> Marvell>> setenv serverip 192.168.200.16
> Marvell>> tftp 0x01000000 uImage-3.13-rc7-ds211j-git-fdt
> Using egiga0 device
> TFTP from server 192.168.200.16; our IP address is 192.168.200.62
> Filename 'uImage-3.13-rc7-ds211j-git-fdt'.
> Load address: 0x1000000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #########################################################
> done

So here you load the kernel into RAM at 0x0100 0000.

> Bytes transferred = 1954736 (1dd3b0 hex)
> Marvell>> setenv bootargs console=ttyS0,115200 ip=off initrd=0x00800040,0x0013FFC0 root=/dev/md0 rw syno_hw_version=DS211j ihd_num=2 netif_num=1 earlyprintk

I don't see you loading the initrd into RAM at 0x0080 0000.

> Marvell>> bootm 0x01000000 0xf8280000

And here you tell it the initrd is at 0xf8280000.

> ## Booting image at 01000000 ...
> Bad Magic Number
> Marvell>> tftp 0x01000000 uImage-3.13-rc7-ds211j-git-fdt
> Using egiga0 device
> TFTP from server 192.168.200.16; our IP address is 192.168.200.62
> Filename 'uImage-3.13-rc7-ds211j-git-fdt'.
> Load address: 0x1000000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #########################################################
> done
> Bytes transferred = 1954800 (1dd3f0 hex)
> Marvell>> bootm 0x01000000 0xf8280000
> ## Booting image at 01000000 ...
>    Image Name:   linux-3.13-rc7-ds211j+
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    1954736 Bytes =  1.9 MB
>    Load Address: 00008000
>    Entry Point:  00008000
>    Verifying Checksum ... OK
> OK
> ## Loading Ramdisk Image at f8280000 ...
>    Image Name:   altair-boot
>    Image Type:   ARM Linux RAMDisk Image (unknown compression)
>    Data Size:    1022268 Bytes = 998.3 kB
>    Load Address: 00800000
>    Entry Point:  00800000
>    Verifying Checksum ... OK
> 
> Starting kernel ...
> 
> Uncompressing Linux... done, booting the kernel.
> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Linux version 3.13.0-rc7-ds211j+ (root at lurch) (gcc version 4.8.2 (Gentoo 4.8.2 p1.3, pie-0.5.8) ) #2 Thu Jan 9 08:52:24 EST 2014
> [    0.000000] CPU: Feroceon 88FR131 [56251311] revision 1 (ARMv5TE), cr=00053977
> [    0.000000] CPU: VIVT data cache, VIVT instruction cache
> [    0.000000] Machine model: Synology DS210 v10, v20, v30, DS211j
> [    0.000000] bootconsole [earlycon0] enabled
> [    0.000000] INITRD: 0xf8280040+0x000f993c is not a memory region - disabling initrd

The kernel is correct. There is no RAM here. That is in the IOMEM
space.

	Andrew