satafis:

- Add function to parse RDH FIS for use in implementing AT_READREG.
- Correct and clean up some structure definitions.
- Sprinkle a bit of const.
- Remove dependency on <dev/ic/wdcreg.h>, WDCTL_4BIT doesn't seem
  to be specified by any recent ATA standard, and it seems to make
  no difference in practice.
- Stop using WDSD_IBM, these bits have been obsolete since before SATA.

siisata:
- Implement AT_READREG.
- Reap now-unneeded <dev/ic/wdcreg.h>.
- Whitespace and slight debug code cleanup.
- Some possibly-uncessary code reordering.

ahcisata:
- Implement AT_READREG.
- Reap now-unneeded <dev/ic/wdcreg.h>.

sys/arch/alpha/conf/GENERIC

@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.331 2010/03/07 09:39:42 plunky Exp $
+# $NetBSD: GENERIC,v 1.332 2010/04/07 17:51:16 jakllsch Exp $
 #
 # This machine description file is used to generate the default NetBSD
 # kernel.
@@ -19,7 +19,7 @@ include 	"arch/alpha/conf/std.alpha"
 
 options 	INCLUDE_CONFIG_FILE	# embed config file in kernel binary
 
-ident		"GENERIC-$Revision: 1.331 $"
+ident		"GENERIC-$Revision: 1.332 $"
 
 maxusers 32
 
@@ -767,3 +767,5 @@ pseudo-device	putter			# for puffs and pud
 options PAX_MPROTECT=0			# PaX mprotect(2) restrictions
 #options PAX_SEGVGUARD=0			# PaX Segmentation fault guard
 options PAX_ASLR=0			# PaX Address Space Layout Randomization
+
+ath* at pci? dev ? function?