Intel sez: Synchronous Flash and XIP is the future -- thoughts?
wd at denx.de
Mon Dec 16 04:56:47 EST 2002
In message <2466.1040031514 at passion.cambridge.redhat.com> you wrote:
> Also true. Of course we have to distinguish between XIP of file system
> pages and of the kernel -- I was ignoring the latter because it's even less
> sane than the former. If you ever want to write to the chip, you have to
> disable all interrupts and wait while the chip is busy. For up to 20
> seconds, in the case of a slow erase.
Running the kernel XIP is not so insane. It can help to reduce boot
time. We still more than 3 seconds from power-on to application
start, which is not so bad, but still too much in some cases;
avoiding the memcpy() of some 2 MB of data is kind of attractive
Software Engineering: Embedded and Realtime Systems, Embedded Linux
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