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 void up_boot_secondary(int cpu, struct task_struct *idle)
  43 {
  44 }
  45
  46 static void __init up_smp_setup(void)
  47 {
  48 }
  49
  50 static void __init up_prepare_cpus(unsigned int max_cpus)
  51 {
  52 }
  53
  54 #ifdef CONFIG_HOTPLUG_CPU
  55 static int up_cpu_disable(void)
  56 {
  57         return -ENOSYS;
  58 }
  59
  60 static void up_cpu_die(unsigned int cpu)
  61 {
  62         BUG();
  63 }
  64 #endif
  65
  66 struct plat_smp_ops up_smp_ops = {
  67         .send_ipi_single        = up_send_ipi_single,
  68         .send_ipi_mask          = up_send_ipi_mask,
  69         .init_secondary         = up_init_secondary,
  70         .smp_finish             = up_smp_finish,
  71         .boot_secondary         = up_boot_secondary,
  72         .smp_setup              = up_smp_setup,
  73         .prepare_cpus           = up_prepare_cpus,
  74 #ifdef CONFIG_HOTPLUG_CPU
  75         .cpu_disable            = up_cpu_disable,
  76         .cpu_die                = up_cpu_die,
  77 #endif
  78 };