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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: release/9.1.0/sys/mips/rmi/mpwait.S 208250 2010-05-18 04:08:58Z rrs $ */ #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)