On 12/27/2010 07:21 PM, Shaohua Li wrote: > RCRB is a memory mapped io. In ICH, it's chipset configuration > registers. this range can't be cached. > I thought we should add a check like > if page is E820_RAM or E820_ACPI then > cached_map > else > uncached_map > we have page_is_ram() API which just checks E820_RAM, I thought we can > add a new API to check E820_ACPI. For x86, that is handled by the MTRRs; for ia64, I would assume ioremap() handles that somehow, otherwise it wouldn't be able to handle existing drivers with ioremap() in them. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
