On 22/01/13 18:23, Tony Lindgren wrote:
> * Mark Jackson <mpfj-list@xxxxxxxxxx> [130122 05:46]:
>> On 22/01/13 13:32, Bedia, Vaibhav wrote:
>>
>> <snip>
>>
>>> Following works for me:
>>>
>>> Kernel
>>> ===
>>> git checkout next-20130122
>>> make distclean
>>> make omap2plus_defconfig
>>> <Enable the appended DTB related options via menuconfig>
>>> make -j7
>>> cat arch/arm/boot/zImage arch/arm/boot/dts/am335x-bone.dtb > arch/arm/boot/zImage-dtb.am335x-bone
>>> mkimage -A arm -O linux -C none -T kernel -a 0x80008000 -e 0x80008000 -n 'Linux' -d arch/arm/boot/zImage-dtb.am335x-bone arch/arm/boot/uImage-dtb.am335x-bone
>>>
>>> U-Boot
>>> ===
>>> Built from v2013.01
>>
>> <snip>
>>
>>> A dumb question... in your case what's the bootargs set? Note that the mainline
>>> kernel for AM335x doesn't have MMC support yet and the default bootargs is set to
>>> rootfs on MMC.
>>
>> Yes ... I'm trying to boot from a rootfs on MMC:-
>>
>> Kernel command line: console=ttyO0,115200n8 earlyprintk debug root=/dev/mmcblk0p2 ro rootfstype=ext2
>> rootwait
>>
>> But I should get *something* from the kernel before it starts trying to access the rootfs ?
>
> Here's something Kevin fixed but did not send it out before going to
> a vacation. Can you give it a try with earlyprintk enabled?
>
> Note that this does not help with no output early on, that sounds
> like a bug configuring the DEBUG_LL port somewhere.
>
> Regards,
>
> Tony
>
>
>
> From: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
> Date: Tue, 15 Jan 2013 14:12:24 -0800
> Subject: [PATCH] Fix omap_serial as module with debug_ll and earlyprintk
>
> Otherwise we can race with the earlyconsole getting turned off
> which can cause a non-booting system with earlyprintk enabled.
>
> [tony@xxxxxxxxxxx: updated description]
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
>
> ---
>
> Kevin, can I add your Signed-off-by to this one?
>
> --- a/arch/arm/mach-omap2/omap_device.c
> +++ b/arch/arm/mach-omap2/omap_device.c
> @@ -1298,4 +1298,4 @@ static int __init omap_device_late_init(void)
> bus_for_each_dev(&platform_bus_type, NULL, NULL, omap_device_late_idle);
> return 0;
> }
> -omap_late_initcall(omap_device_late_init);
> +late_initcall_sync(omap_device_late_init);
>
Sorry ... still no joy:-
U-Boot# askenv bootargs
Please enter 'bootargs':ttyO0,115200n8 earlyprintk root=/dev/mmcblk0p2 ro rootfstype=ext2 rootwait
U-Boot# dhcp 80000000 10.0.0.100:/nanobone/uImage-dtb;bootm 80000000
link up on port 0, speed 100, full duplex
BOOTP broadcast 1
*** Unhandled DHCP Option in OFFER/ACK: 44
*** Unhandled DHCP Option in OFFER/ACK: 46
*** Unhandled DHCP Option in OFFER/ACK: 44
*** Unhandled DHCP Option in OFFER/ACK: 46
DHCP client bound to address 10.0.0.112
Using cpsw device
TFTP from server 10.0.0.100; our IP address is 10.0.0.112
Filename '/nanobone/uImage-dtb'.
Load address: 0x80000000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
###########
625 KiB/s
done
Bytes transferred = 3972199 (3c9c67 hex)
## Booting kernel from Legacy Image at 80000000 ...
Image Name: Linux 3.8.0-rc3-12154-gac00f0e-d
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3972135 Bytes = 3.8 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
My .config can be found at http://pastebin.com/rj5ptt7W
Cheers
Mark J.
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