* [U-Boot-Users] cache related query for MIPS
@ 2008-03-26 4:42 Chetan Nanda
2008-03-26 11:01 ` Shinya Kuribayashi
0 siblings, 1 reply; 2+ messages in thread
From: Chetan Nanda @ 2008-03-26 4:42 UTC (permalink / raw)
To: u-boot
Hi All,
I am using u-boot for booting Nucleus on our MIPS 4KC processor.
In u-boot code, when we give 'bootelf' command, it load all sections
one by one and then do flus_cache for that section. (though
flush_cache() function is empty).
And in the last before jumping to start location it disable the caches
using dcache_disable().
My question here is why cache is tried to flushed and disabled before
jumping into start location?
And what if new OS do not touches the cache configuration at all?
thanks,
Chetan Nanda
^ permalink raw reply [flat|nested] 2+ messages in thread
* [U-Boot-Users] cache related query for MIPS
2008-03-26 4:42 [U-Boot-Users] cache related query for MIPS Chetan Nanda
@ 2008-03-26 11:01 ` Shinya Kuribayashi
0 siblings, 0 replies; 2+ messages in thread
From: Shinya Kuribayashi @ 2008-03-26 11:01 UTC (permalink / raw)
To: u-boot
Chetan Nanda wrote:
> My question here is why cache is tried to flushed and disabled before
> jumping into start location?
As described in source code, it seems be the QNX requirement.
I don't know much about QNX, but archives probably help you.
http://search.gmane.org/?query=bootelf+dcache_disable&author=&group=gmane.comp.boot-loaders.u-boot
^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-03-26 11:01 ` Shinya Kuribayashi
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