From e898bed96b6d4721cc3a184bcb67c0ecb50f680e Mon Sep 17 00:00:00 2001
From: eeh <eeh@NetBSD.org>
Date: Mon, 18 Aug 2003 21:30:51 +0000
Subject: [PATCH] Use the only documented method to get the board data from the
 firmware.

---
 sys/arch/evbppc/walnut/walnut_start.S | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sys/arch/evbppc/walnut/walnut_start.S b/sys/arch/evbppc/walnut/walnut_start.S
index 1a397c34db44..508d156bfe5c 100644
--- a/sys/arch/evbppc/walnut/walnut_start.S
+++ b/sys/arch/evbppc/walnut/walnut_start.S
@@ -1,4 +1,4 @@
-/*	$NetBSD: walnut_start.S,v 1.9 2003/08/03 23:28:45 eeh Exp $	*/
+/*	$NetBSD: walnut_start.S,v 1.10 2003/08/18 21:30:51 eeh Exp $	*/
 /*	$OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $	*/
 
 /*
@@ -90,6 +90,9 @@
 #include <powerpc/ibm4xx/dcr405gp.h>
 #include <powerpc/ibm4xx/pmap.h>
 
+/* Function pointer for requesting board_config_data from openbios*/
+#define BOARD_CFG_FP       0xFFFE0B50
+
 /*
  * Some instructions gas doesn't understand (yet?)
  */
@@ -148,7 +151,14 @@ __start:
 	nop
 
 1:
-	mflr	%r31			/* Save address of PROM info_block */
+	/* Get the board_config_data from openbios */
+	lis	%r3,BOARD_CFG_FP@h
+	ori	%r3,%r3,BOARD_CFG_FP@l
+	lwz     %r0,0x0(%r3)
+	mtctr   %r0
+	bctrl				/* call the xcoff function */
+	mr	%r31,%r3		/* Save value in r31 */
+
 	li	%r0,0
 	mtmsr	%r0			/* Disable FPU/MMU/exceptions */
 	isync