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

On Sat, Jan 11, 2014 at 12:09:11AM +1000, Ben Peddell wrote:

On 10/01/14 21:28, Russell King - ARM Linux wrote:

quoted

On Fri, Jan 10, 2014 at 11:01:06AM +1000, Ben Peddell wrote:

quoted

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