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