Date: Tue, 18 May 2010 04:08:58 +0000 (UTC) From: Randall Stewart <rrs@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r208250 - head/sys/mips/rmi Message-ID: <201005180408.o4I48weH034643@svn.freebsd.org>
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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)
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