Re: [XenARM] Problems when booting on OMAP5432 devboard

[Chen Baozi <baozich@xxxxxxxxx>]

On Jul 1, 2013, at 8:43 PM, Chen Baozi <baozich@xxxxxxxxx> wrote:

> On Mon, Jul 01, 2013 at 01:39:02PM +0100, Ian Campbell wrote:
>> On Mon, 2013-07-01 at 20:32 +0800, Chen Baozi wrote:
>>> On Jul 1, 2013, at 8:06 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>>> 
>>>> On Mon, 2013-07-01 at 20:00 +0800, Chen Baozi wrote:
>>>> 
>>>>>> You device has 2GB RAM, what happens if you hack the DTS to say it only
>>>>>> has 1GB?
>>>>> 
>>>>> Bingo! Compared to Arndale board, OMAP5432 uEVM's RAM is not yet 
>>>>> 0x40000000~0xbfffffff, but 0x80000000~0xffffffff. After make the 
>>>>> following change to DTS:
>>>>> 
>>>>>   memory {
>>>>>           device_type = "memory"
>>>>> -         reg = <0x80000000 0x80000000>; /* 2 GB */
>>>>> +         reg = <0x80000000 0x40000000>; /* 1 GB */
>>>>>   };
>>>>> 
>>>>> I can reach the output "Xen heap: 131072 pages  Dom heap: 131072 pages". 
>>>> 
>>>> Excellent!
>>>> 
>>>> So I guess if you keep the 2GB but put it at the right address it will
>>>> also work?
>>> 
>>> I'm afraid no, :-(
>>> 
>>> Here is how I load and boot the image both in 1GB case and 2G case (from 
>>> u-boot):
>>> 
>>> OMAP5430 EVM # fatload mmc 0 0x80000000 xen-uImage
>>> reading xen-uImage
>>> 902572 bytes read in 59 ms (14.6 MiB/s)
>>> OMAP5430 EVM # bootm 0x80000000 -
>>> ## Booting kernel from Legacy Image at 80000000 ...
>>>   Image Name:
>>>   Image Type:   ARM Linux Kernel Image (uncompressed)
>>>   Data Size:    902508 Bytes = 881.4 KiB
>>>   Load Address: 80200000
>>>   Entry Point:  80200000
>>>   Verifying Checksum ... OK
>>>   Loading Kernel Image ... OK
>>> OK
>> 
>>> And I've also tried "fat load mmc 0 0x90000000 xen-uImage" in both
>>> cases. It works for 1GB but fails in 2GB case too.
>> 
>> What is the base address of RAM on the A31 SoC?
> 
> A31 SoC? I use OMAP5432 ES2.0 uEVM (OMAP5 Panda) board.
> 
> The attachment is the dts file which the linux kernel uses on this board by
> default, which the memory line is:
> 
>       reg = <0x80000000 0x80000000>; /* 2 GB */
> 
However, interestingly, in omap5-evm.dts, it writes:

        reg = <0x80000000 0x7F000000>; /* 2032 MB */

And if I use this line, it works!

So I think this might be the point.


_______________________________________________
Xen-arm mailing list
Xen-arm@xxxxxxxxxxxxx
http://lists.xen.org/cgi-bin/mailman/listinfo/xen-arm