ioremap alignment question (kernel 2.2.13)

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Greetings,

In working with a driver, I've discovered that if I ioremap() two
addresses which are not page aligned and within the same 4k block of
memory, doing a writel() to the remapped addresses generates a kernel
"Unable to handle kernel paging request." I'm using kernel 2.2.13 for
ARM, though "slightly" ;) modified.

Questions:
- are there alignment requirements for ioremap()?
- can you ioremap() the same location more than once?

Documentation/IO-mapping.txt didn't address this.

Pointers to documentation, comments, questions, etc. welcomed.

TIA,

Eli

-- 
Eli Carter
eli.carter@inet.com
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