Print EPC address on NMI (i.e. when "DUMP" button is pressed) for debug.

sys/arch/ews4800mips/ews4800mips/locore_machdep.S

@@ -1,4 +1,4 @@
-/*	$NetBSD: locore_machdep.S,v 1.1 2005/12/29 15:20:08 tsutsui Exp $	*/
+/*	$NetBSD: locore_machdep.S,v 1.2 2007/06/27 15:48:16 tsutsui Exp $	*/
 
 /*-
  * Copyright (c) 2004, 2005 The NetBSD Foundation, Inc.
@@ -53,14 +53,27 @@ LEAF_NOPROFILE(ews4800mips_nmi_vec)
 END(ews4800mips_nmi_vec)
 
 LEAF_NOPROFILE(nmi_exception)
-	li	a0, 0		/* x-pos */
-2:	li	a2, 64		/* '@' */
+	li	a0, 0			/* x-pos */
+	li	k0, 32
+1:
+	mfc0	v0, MIPS_COP_0_EXC_PC	/* get EPC */
+	addu	k0, k0, -4
+	srl	v0, v0, k0
+	andi	v1, v0, 0xf
+	sltiu	v0, v1, 10
+	bnez	v0, 2f
+	 nop
+	addi	v1, v1, 'a' - ('9' + 1)
+2:
+	addi	a2, v1, '0'
 	lui	v0, 0xbfc0
 	ori	v0, 0xff60
-	li	a1, 0		/* y-pos */
-	jal	v0
-	 nop
-	b	2b
+	jal	v0			/* ROM_PUTC(x, y, c) */
+	 li	a1, 0			/* y-pos */
+	bne	k0, zero, 1b
 	 addiu	a0, a0, 12
+3:
+	b	3b
+	 nop
 	/* NOTREACHED */
 END(nmi_exception)