PERFORCE change 47906 for review

[Juli Mallett]

http://perforce.freebsd.org/chv.cgi?CH=47906

Change 47906 by jmallett at jmallett_oingo on 2004/03/01 00:52:59

	Do effectively nothing, but stop trying so hard.  I have stuff
	to use a jump table, it neither helps nor hurts.  Coming soon.

Affected files ...

.. //depot/projects/mips/sys/mips/mips/exception.S#14 edit

Differences ...

==== //depot/projects/mips/sys/mips/mips/exception.S#14 (text+ko) ====

@@ -41,45 +41,6 @@
  */
 LEAF(ExceptionVector)
 	.set noat
-	/*
-	 * Interrupts are fast.  Let everything else go through trap().
-	 */
-	mfc0	k0, MIPS_COP_0_CAUSE
-	li	k1, 31 << 2
-	and	k0, k1
-	beq	k0, zero, Interrupt
-	nop
-
-	/*
-	 * If all the bits were set, it's 31, it's VCED, so go there.
-	 */
-	bne	k0, k1, 1f
-	nop
-
-	j	VCED
-	/* No BDSlot, save space by just pulling in the next insn. */
-
-1:
-	/*
-	 * Except stuff the TLB handler really wants.  (TLB exceptions
-	 * that are not TLBMod, that goes through trap() and into pmap.)
-	 * This means that if this is one, or has bits outside of the
-	 * three lowest set, we need to go ahead.  Otherwise, switch to
-	 * the TLB miss handler.
-	 */
-	li	k1, 1 << 2
-	beq	k1, k0, 1f
-	nop
-
-	li	k1, ~(3 << 2)
-	and	k1, k0
-	bne	k1, zero, 1f
-	nop
-
-	j	XTLBMissVector
-	nop
-
-1:
 	dsubu	sp, sp, TF_SIZE
 	dla	k0, 1f
 	j	exception_save_registers
@@ -174,8 +135,8 @@
 LEAF(XTLBMissVector)
 	.set noat
 	dmfc0	k0, MIPS_COP_0_BAD_VADDR
-	li	k1, MIPS_XKSEG_START
-	subu	k0, k1
+	dli	k1, MIPS_XKSEG_START
+	dsubu	k0, k1
 	/*
 	 * Shift right logical to get a page index, but leaving
 	 * enough bits to index an array of 64 bit values, plus