LXR linux/arch/mips/kernel/smp-up.c

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2006, 07 by Ralf Baechle (ralf@linux-mips.org)
   7 *
   8 * Symmetric Uniprocessor (TM) Support
   9 */
  10#include <linux/kernel.h>
  11#include <linux/sched.h>
  12
  13/*
  14 * Send inter-processor interrupt
  15 */
  16static void up_send_ipi_single(int cpu, unsigned int action)
  17{
  18        panic(KERN_ERR "%s called", __func__);
  19}
  20
  21static inline void up_send_ipi_mask(const struct cpumask *mask,
  22                                    unsigned int action)
  23{
  24        panic(KERN_ERR "%s called", __func__);
  25}
  26
  27/*
  28 *  After we've done initial boot, this function is called to allow the
  29 *  board code to clean up state, if needed
  30 */
  31static void up_init_secondary(void)
  32{
  33}
  34
  35static void up_smp_finish(void)
  36{
  37}
  38
  39/*
  40 * Firmware CPU startup hook
  41 */
  42static int up_boot_secondary(int cpu, struct task_struct *idle)
  43{
  44        return 0;
  45}
  46
  47static void __init up_smp_setup(void)
  48{
  49}
  50
  51static void __init up_prepare_cpus(unsigned int max_cpus)
  52{
  53}
  54
  55#ifdef CONFIG_HOTPLUG_CPU
  56static int up_cpu_disable(void)
  57{
  58        return -ENOSYS;
  59}
  60
  61static void up_cpu_die(unsigned int cpu)
  62{
  63        BUG();
  64}
  65#endif
  66
  67const struct plat_smp_ops up_smp_ops = {
  68        .send_ipi_single        = up_send_ipi_single,
  69        .send_ipi_mask          = up_send_ipi_mask,
  70        .init_secondary         = up_init_secondary,
  71        .smp_finish             = up_smp_finish,
  72        .boot_secondary         = up_boot_secondary,
  73        .smp_setup              = up_smp_setup,
  74        .prepare_cpus           = up_prepare_cpus,
  75#ifdef CONFIG_HOTPLUG_CPU
  76        .cpu_disable            = up_cpu_disable,
  77        .cpu_die                = up_cpu_die,
  78#endif
  79};
  80