RFC: ARM related fixes - GIC, cache line size, PCI FDT & AHCI

[Zbigniew Bodek]

Hello Everyone.

We would like to submit some new patches recently developed by Semihalf.

You can find them here:
http://people.freebsd.org/~zbb/Semihalf/12.2013/

Detailed description is available in the commit logs but in general:

-- 0001-Resolve-cache-line-size-using-CP15.patch
   - use cache line size acquired in runtime

-- 0002-GIC-polarity-and-level-support.patch
   - suport for setting trigger level and polarity in GIC

-- 0003-Add-PCI-FDT-interrupt-trigger-polarity-parsing.patch
   - trigger and polarity parsing for PCI FDT interrupts

-- 0004-Do-not-attach-to-bridges-in-AHCI-driver.patch
-- 0005-Use-only-mapped-BIOs-on-ARM.patch
   - Two patches enabling the AHCI driver on ARM chips


We will appreciate if you could post your comments and/or remarks by the
end of this week when we plan to commit the changes.

Best regards
zbb