LXR linux/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/delay.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
  51int xlr_wakeup_secondary_cpus(void)
  52{
  53        struct nlm_soc_info *nodep;
  54        unsigned int i, j, boot_cpu;
  55        volatile u32 *cpu_ready = nlm_get_boot_data(BOOT_CPU_READY);
  56
  57        /*
  58         *  In case of RMI boot, hit with NMI to get the cores
  59         *  from bootloader to linux code.
  60         */
  61        nodep = nlm_get_node(0);
  62        boot_cpu = hard_smp_processor_id();
  63        nlm_set_nmi_handler(nlm_rmiboot_preboot);
  64        for (i = 0; i < NR_CPUS; i++) {
  65                if (i == boot_cpu || !cpumask_test_cpu(i, &nlm_cpumask))
  66                        continue;
  67                nlm_pic_send_ipi(nodep->picbase, i, 1, 1); /* send NMI */
  68        }
  69
  70        /* Fill up the coremask early */
  71        nodep->coremask = 1;
  72        for (i = 1; i < nlm_cores_per_node(); i++) {
  73                for (j = 1000000; j > 0; j--) {
  74                        if (cpu_ready[i * NLM_THREADS_PER_CORE])
  75                                break;
  76                        udelay(10);
  77                }
  78                if (j != 0)
  79                        nodep->coremask |= (1u << i);
  80                else
  81                        pr_err("Failed to wakeup core %d\n", i);
  82        }
  83
  84        return 0;
  85}
  86