* [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
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