svn commit: r208250 - head/sys/mips/rmi

[Randall Stewart]

Author: rrs
Date: Tue May 18 04:08:58 2010
New Revision: 208250
URL: http://svn.freebsd.org/changeset/base/208250

Log:
  Adds the file I forgot to add... that handles
  the mpwait.S for RMI
  
  Approved by:	JC

Added:
  head/sys/mips/rmi/mpwait.S   (contents, props changed)

Added: head/sys/mips/rmi/mpwait.S
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/mips/rmi/mpwait.S	Tue May 18 04:08:58 2010	(r208250)
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 2010 RMI Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <machine/asm.h>
+#include <machine/cpu.h>
+#include <machine/cpuregs.h>
+
+#include "assym.s"
+
+	.text
+	.set	noat
+	.set	noreorder
+
+/*
+ * On XLR the slave processors and threads will be executing boot
+ * loader code on startup. We need to make them run our code before
+ * blowing away boot loader memory.
+ */
+LEAF(mpwait)
+	PTR_LA  gp, _C_LABEL(_gp)
+	PTR_LA  t1, _C_LABEL(xlr_ap_release)
+	mfc0	t2, $15, 1
+	andi	t2, 0x1f
+	sll	t2, t2, 2
+	add	t1, t2
+
+1:	lw	t0, 0(t1)
+	bnez	t0, 2f
+	nop     /* We should not busy wait in core0 threads */
+	nop     /* on bootup, this will slow the cpu0 thread */
+	nop     /* down - TODO - wait with IPI based wakeup */
+	nop
+	nop
+	nop
+	nop
+	nop
+	j	1b
+	nop
+2:
+	PTR_LA  t1, _C_LABEL(mpentry)
+	jr	t1
+	nop
+END(mpwait)