BeagleBoard-Xm: memtest return error

[Sascha Hauer]

On Wed, Jun 03, 2015 at 09:42:05PM +0200, Alexander Aring wrote:
> 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.

How about a command to flush caches instead?

Sascha

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