arch/mips/netlogic/xlr/wakeup.c

   1 /*
   2  * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
   3  * reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the NetLogic
   9  * license below:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <linux/init.h>
  36 #include <linux/threads.h>
  37
  38 #include <asm/asm.h>
  39 #include <asm/asm-offsets.h>
  40 #include <asm/mipsregs.h>
  41 #include <asm/addrspace.h>
  42 #include <asm/string.h>
  43
  44 #include <asm/netlogic/haldefs.h>
  45 #include <asm/netlogic/common.h>
  46 #include <asm/netlogic/mips-extns.h>
  47
  48 #include <asm/netlogic/xlr/iomap.h>
  49 #include <asm/netlogic/xlr/pic.h>
  50
  51 int __cpuinit xlr_wakeup_secondary_cpus(void)
  52 {
  53         unsigned int i, boot_cpu;
  54
  55         /*
  56          *  In case of RMI boot, hit with NMI to get the cores
  57          *  from bootloader to linux code.
  58          */
  59         boot_cpu = hard_smp_processor_id();
  60         nlm_set_nmi_handler(nlm_rmiboot_preboot);
  61         for (i = 0; i < NR_CPUS; i++) {
  62                 if (i == boot_cpu || (nlm_cpumask & (1u << i)) == 0)
  63                         continue;
  64                 nlm_pic_send_ipi(nlm_pic_base, i, 1, 1); /* send NMI */
  65         }
  66
  67         return 0;
  68 }