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  */
  16 static void up_send_ipi_single(int cpu, unsigned int action)
  17 {
  18         panic(KERN_ERR "%s called", __func__);
  19 }
  20
  21 static 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  */
  31 static void up_init_secondary(void)
  32 {
  33 }
  34
  35 static void up_smp_finish(void)
  36 {
  37 }
  38
  39 /*
  40  * Firmware CPU startup hook
  41  */
  42 static int up_boot_secondary(int cpu, struct task_struct *idle)
  43 {
  44         return 0;
  45 }
  46
  47 static void __init up_smp_setup(void)
  48 {
  49 }
  50
  51 static void __init up_prepare_cpus(unsigned int max_cpus)
  52 {
  53 }
  54
  55 #ifdef CONFIG_HOTPLUG_CPU
  56 static int up_cpu_disable(void)
  57 {
  58         return -ENOSYS;
  59 }
  60
  61 static void up_cpu_die(unsigned int cpu)
  62 {
  63         BUG();
  64 }
  65 #endif
  66
  67 const 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 };