[PATCH] ARM: dts: rockchip: Reserve unusable memory region on rk3066
paweljarosz3691 at gmail.com
Thu Oct 13 01:55:17 PDT 2016
W dniu 13.10.2016 o 09:12, Huang, Tao pisze:
> Hi, Paweł:
> On 2016年10月10日 17:11, Paweł Jarosz wrote:
>> W dniu 10.10.2016 o 09:18, Huang, Tao pisze:
>>> Our IC guy need us tell them which master can not access such area, DMA
>>> or EMMC Controller or GPU, etc? Could you tell me how to reproduce such
>>> And we can confirm CPU core can access this memory through /dev/mem and
>>> the test board is 1GB too. Personally, I don't think RK3066 has such
>>> limit because when we verify this chip, we don't found such limit at all.
>>> Huang, Tao
>> I'm getting this on Ubuntu 16.04 with mainline kernel.
>> My board always freezes when i type: "memtester 800M"
> We try run memtest 800M with Linux kernel 4.8, which killed by OOM.
> But if we run:
> # memtester -p 0x9F000000 16K 1
> memtester version 4.3.0 (32-bit)
> Copyright (C) 2001-2012 Charles Cazabon.
> Licensed under the GNU General Public License version 2 (only).
> pagesize is 4096
> pagesizemask is 0xfffff000
> want 0MB (16384 bytes)
> Loop 1/1:
> Stuck Address : ok
> Random Value : ok
> Compare XOR : ok
> Compare SUB : ok
> Compare MUL : ok
> Compare DIV : ok
> Compare OR : ok
> Compare AND : ok
> Sequential Increment: ok
> Solid Bits : ok
> Block Sequential : ok
> Checkerboard : ok
> Bit Spread : ok
> Bit Flip : ok
> Walking Ones : ok
> Walking Zeroes : ok
> 8-bit Writes : ok
> 16-bit Writes : ok
> So these memory should be fine to CPU core. Maybe your system just
> freeze because out of memory.
weird ... memtester -p 0x9F000000 16K 1 gave me the same result.
Could you try one last command:
Values > 200M causing freeze.
If this won't do it, than maybe there is something wrong with my board.
Thanks for your time.
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