* [U-Boot] powerpc unlock cache difference between e300 and e500
@ 2011-01-06 3:11 YiChao Ma
2011-01-07 11:42 ` Baidu Boy
2011-01-07 21:13 ` Scott Wood
0 siblings, 2 replies; 3+ messages in thread
From: YiChao Ma @ 2011-01-06 3:11 UTC (permalink / raw)
To: u-boot
hi:
My question is why e500 unlock_ram_in_cache in board.c ,and e300 unlock_ram_in_cache in bootm.c?
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] powerpc unlock cache difference between e300 and e500
2011-01-06 3:11 [U-Boot] powerpc unlock cache difference between e300 and e500 YiChao Ma
@ 2011-01-07 11:42 ` Baidu Boy
2011-01-07 21:13 ` Scott Wood
1 sibling, 0 replies; 3+ messages in thread
From: Baidu Boy @ 2011-01-07 11:42 UTC (permalink / raw)
To: u-boot
2011/1/6 YiChao Ma <ycma@mail.ustc.edu.cn>:
> hi:
> ?My question is why e500 unlock_ram_in_cache in board.c ,and e300 unlock_ram_in_cache in bootm.c?
>
>
I also find this weeks ago.Maybe we can conmbine them.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] powerpc unlock cache difference between e300 and e500
2011-01-06 3:11 [U-Boot] powerpc unlock cache difference between e300 and e500 YiChao Ma
2011-01-07 11:42 ` Baidu Boy
@ 2011-01-07 21:13 ` Scott Wood
1 sibling, 0 replies; 3+ messages in thread
From: Scott Wood @ 2011-01-07 21:13 UTC (permalink / raw)
To: u-boot
On Thu, 6 Jan 2011 11:11:21 +0800
YiChao Ma <ycma@mail.ustc.edu.cn> wrote:
> hi:
> My question is why e500 unlock_ram_in_cache in board.c ,and e300 unlock_ram_in_cache in bootm.c?
e500 uses the data cache for normal caching after it's done with
the locked SRAM. e300 doesn't -- mainly as a matter of history and
needing to fixing any bugs that pop up. So it only needs to unlock the
cache sometime before transferring control to the OS.
-Scott
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2011-01-07 21:13 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-01-06 3:11 [U-Boot] powerpc unlock cache difference between e300 and e500 YiChao Ma
2011-01-07 11:42 ` Baidu Boy
2011-01-07 21:13 ` Scott Wood
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.