From owner-svn-src-user@FreeBSD.ORG  Thu Feb 23 05:19:35 2012
Return-Path: <owner-svn-src-user@FreeBSD.ORG>
Delivered-To: svn-src-user@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 41D91106566B;
	Thu, 23 Feb 2012 05:19:35 +0000 (UTC)
	(envelope-from jchandra@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 2C97F8FC16;
	Thu, 23 Feb 2012 05:19:35 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q1N5JZ4O085319;
	Thu, 23 Feb 2012 05:19:35 GMT
	(envelope-from jchandra@svn.freebsd.org)
Received: (from jchandra@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q1N5JYse085317;
	Thu, 23 Feb 2012 05:19:34 GMT
	(envelope-from jchandra@svn.freebsd.org)
Message-Id: <201202230519.q1N5JYse085317@svn.freebsd.org>
From: "Jayachandran C." <jchandra@FreeBSD.org>
Date: Thu, 23 Feb 2012 05:19:34 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
X-SVN-Group: user
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r232024 - user/jchandra/xlp-merge/sys/mips/nlm
X-BeenThere: svn-src-user@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the experimental &quot; user&quot;
	src tree" <svn-src-user.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-user>,
	<mailto:svn-src-user-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-user>
List-Post: <mailto:svn-src-user@freebsd.org>
List-Help: <mailto:svn-src-user-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-user>,
	<mailto:svn-src-user-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 23 Feb 2012 05:19:35 -0000

Author: jchandra
Date: Thu Feb 23 05:19:34 2012
New Revision: 232024
URL: http://svn.freebsd.org/changeset/base/232024

Log:
  Update the L1D cache flush sequence when enabling threads
  
  Added more comments. This code is still experimental.

Modified:
  user/jchandra/xlp-merge/sys/mips/nlm/mpreset.S

Modified: user/jchandra/xlp-merge/sys/mips/nlm/mpreset.S
==============================================================================
--- user/jchandra/xlp-merge/sys/mips/nlm/mpreset.S	Thu Feb 23 05:18:05 2012	(r232023)
+++ user/jchandra/xlp-merge/sys/mips/nlm/mpreset.S	Thu Feb 23 05:19:34 2012	(r232024)
@@ -55,24 +55,24 @@
 	.set	noreorder
 	li	$8, LSU_DEBUG_DATA0 /* use register number to handle */
 	li	$9, LSU_DEBUG_ADDR  /* different ABIs */
-	li	t2, 0
-	li	t3, 0x200
+	li	t2, 0		/* index */
+	li	t3, 0x1000	/* loop count, 512 sets * 8 whatever? */
 1:
 	sll	v0, t2, 5
 	MTCR(0, 8)
-	ori	v1, v0, 0x3
+	ori	v1, v0, 0x3	/* way0 | write_enable | write_active */
 	MTCR(3, 9)
 2:
 	MFCR(3, 9)
-	andi	v1, 0x1
+	andi	v1, 0x1		/* wait for write_active == 0 */
 	bnez	v1, 2b
 	nop
 	MTCR(0, 8)
-	ori	v1, v0, 0x7
+	ori	v1, v0, 0x7	/* way1 | write_enable | write_active */
 	MTCR(3, 9)
 3:
 	MFCR(3, 9)
-	andi	v1, 0x1
+	andi	v1, 0x1		/* wait for write_active == 0 */
 	bnez	v1, 3b
 	nop
 	addi	t2, 1
@@ -195,7 +195,7 @@ LEAF(xlp_enable_threads)
 	mfc0	t1, MIPS_COP_0_STATUS
 
 	move	sp, t0		/* Restore the real SP */
-	jr	ra
+	jr.hb	ra
 	nop
 END(xlp_enable_threads)
 #endif