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From: Davide CASCONE <davide.cascone@st.com>
To: <linux-mtd@lists.infradead.org>
Subject: uboot performances
Date: Fri, 23 Jun 2006 12:55:56 +0200	[thread overview]
Message-ID: <001001c696b3$9aeacf70$253682a4@nap.st.com> (raw)


I'm working with the OMAP5912 OSK platform. I have the boot-loader code and the Linux OS compressed image in a Sibley flash. When I run the system, the boot loader (uBoot) have to copy the Kernel Image (about 700KB) in RAM. It takes about 300ms in order to perform that copy. But I have read some benchmark results in which the copy of the kernel in RAM lasts only 80-100ms. In order to reduce the time of the copy on my platform, the only solution that I found (after checking the memory controller settings) is to modify the copy function memmove (uboot/ lib_generic/string.c). This function performs the copy byte by byte. If I modify this function to perform the copy 4byte by 4byte, the bootloader only takes about 80 ms. Do you think this is a good workaround for this problem? Can you suggest me anything better?

Thanks in advance.
Best Regards,
Davide

             reply	other threads:[~2006-06-23 12:22 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-06-23 10:55 Davide CASCONE [this message]
2006-06-23 12:26 ` uboot performances Josh Boyer
2006-06-23 12:32 ` Gianluca

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