Improve sparc64 "mach" descriptions.

share/man/man4/ddb.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: ddb.4,v 1.105 2007/09/23 00:26:03 martin Exp $
+.\"	$NetBSD: ddb.4,v 1.106 2007/09/23 13:11:32 martin Exp $
 .\"
 .\" Copyright (c) 1997 - 2007 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -1105,12 +1105,8 @@ Dump the FPU state.
 Print instruction translation look-aside buffer context information.
 .It Ic itsb
 Display instruction translation storage buffer information.
-.It Ic lock
-Print information about a lock.
 .It Ic lwp
 Display a struct lwp
-.It Ic sir
-Reset the machine and enter prom (do a Software Initiated Reset).
 .It Ic pcb
 Display information about the
 .Dq struct pcb
@@ -1136,6 +1132,8 @@ Enter the OFW PROM.
 Display the
 .Dq struct pv_entry
 pointed to.
+.It Ic sir
+Reset the machine and enter prom (do a Software Initiated Reset).
 .It Ic stack
 Dump the window stack.
 Use the
@@ -1159,12 +1157,23 @@ Dumps the UVM histories.
 Set or clear a physical or virtual hardware watchpoint.
 Pass the address to be watched, or
 .Dq 0
-to clear the watchpoint.
-Append
+(or ommit the address) to clear the watchpoint.
+Optional modifiers are
 .Dq p
-to the watch point to use the physical watchpoint registers.
+for physical address,
+.Dq r
+for trap on read access (default: trap on write access only),
+.Dq b
+for 8 bit width,
+.Dq h
+for 16 bit,
+.Dq l
+for 32 bit or 
+.Dq L
+for 64 bit.
 .It Ic window
-Print register window information about given address.
+Print register window information. Argument is a stack frame number (0 is
+top of stack, which is used when no index is given).
 .El
 .Ss SUN3 and SUN3X
 .Bl -tag -width "intrchain" -compact