[U-Boot-Users] POST tests without OCM
Stefan Roese
sr at denx.de
Mon Dec 17 07:53:35 CET 2007
On Saturday 15 December 2007, Craig Millen wrote:
> Yes I am using the 440EP. I was referring to all the code in
> cpu/ppc4xx/commproc.c, like this section:
>
> #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
> void post_word_store (ulong a)
> {
> volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR +
> CFG_POST_WORD_ADDR);
> *(volatile ulong *) save_addr = a;
> }
>
> ulong post_word_load (void)
> {
> volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR +
> CFG_POST_WORD_ADDR);
> return *(volatile ulong *) save_addr;
> }
Yes, I was referring to this code too.
> There are a few more functions in there that refer to the OCM.
> What/where is the unused GPT that you are talking about?
GPT == General Purpose Timer. For example the GPT0_COMP6 register. But this is
of course application/OS dependant. Could be that your application (Linux
etc) is using this GPT register. But I doubt it.
BTW: We have an ACK from AMCC that the content of these registers is retained
even during reset.
Best regards,
Stefan
=====================================================================
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de
=====================================================================
More information about the U-Boot
mailing list