BeagleBoard-Xm: memtest return error

[Alexander Aring]

Hi,

On Wed, Jun 03, 2015 at 05:08:31PM +0300, Валерий Ныров wrote:
> Hello everyone! I am a newbie and trying to run the barebox on
> BeagleBoard-Xm rev.C with 512MB DDR on board.
> 
> To support 512MB I did the following:
> 
> 1) file: arm/boards/beagle/board.c, func: beagle_mem_init(), change line 85:
> 
> beagle_mem_init(void)
> {
>     //omap_add_ram0(SZ_128M);
>     omap_add_ram0(SZ_512M);
> }
> 
> 2) file: arm/boards/beagle/lowlevel.c, func: sdrc_init(), change line 127:
> 
> //writel(0x02584099, OMAP3_SDRC_REG(MCFG_0));
> writel(0x02590099, OMAP3_SDRC_REG(MCFG_0)); // to add 512MB support on CS0
> 
> Then launch barebox and send command - memtest, which return error:
> "FAILURE: Address bit stuck high @ 0x90000000: expected 0xaaaaaaaa,
> actual 0x7fffffff",
> but commands "memset" writes data to the address 0x90000000 correct,
> what I did not so?
> 

if memtest failed then the caching will be enabled again. This means I
would not trust the memset and memory display command here.

Maybe you could add some memset argument for disable/enable the caching
on some page (which is memory address space) which you want to write and
read. Just for debugging cases.

Don't know if Sascha likes this idea.

- Alex