[U-Boot] post_memory_tests

[chi l]

Hello,
 
Thank you for your answer. Yes. the test runs from the NOR flash (post_run function calls the test in arch/arm/lib/board.c before the relocation of U-Boot in the RAM). That is why I'm kind of confuse about why the tests works for 4K regions and not for 8K regions. Maybe, even if the test runs in ROM, are there some regions in the RAM that I should prevent from testing?
 
Regards
 
> To: chi-rong at outlook.com
> CC: u-boot at lists.denx.de
> From: wd at denx.de
> Subject: Re: [U-Boot] post_memory_tests
> Date: Thu, 13 Mar 2014 09:25:35 +0100
> 
> Dear chi l,
> 
> In message <BAY180-W137A35527F40147A2E3FD587760 at phx.gbl> you wrote:
> >
> > What is the purpose of the _POST_WORD_ADDR variable in include/post.h? How
> > should I define the value of that variable?
> 
> See post_word_load() and post_word_store() [both in include/post.h]
> how _POST_WORD_ADDR gets used.  You need a persistent (across resets
> of the CPU) non-RAM memory cell.
> 
> > Also, I try to run the post_memory_test in normal mode, before
> > relocation ( the test verifies only small 4Kb regions of RAM around
> > each 1Mb boundary). That seems to work. But when I tried to change
> > the value of the regionfrom 4K to 8K, it does not work anymore. Does
> > anyone have a clue on that ?
> 
> You are aware that you must not (under no circumstances) be executing
> this code from system RAM?  It can only be run rom a memory device
> that is not currently being tested (parallel NOR flash, SRAM, OCM or
> such).
> 
> Best regards,
> 
> Wolfgang Denk
> 
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