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/*-
* 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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