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(cpumask_t mask, unsigned int action)
  22 {
  23         panic(KERN_ERR "%s called", __func__);
  24 }
  25
  26 /*
  27  *  After we've done initial boot, this function is called to allow the
  28  *  board code to clean up state, if needed
  29  */
  30 static void __cpuinit up_init_secondary(void)
  31 {
  32 }
  33
  34 static void __cpuinit up_smp_finish(void)
  35 {
  36 }
  37
  38 /* Hook for after all CPUs are online */
  39 static void up_cpus_done(void)
  40 {
  41 }
  42
  43 /*
  44  * Firmware CPU startup hook
  45  */
  46 static void __cpuinit up_boot_secondary(int cpu, struct task_struct *idle)
  47 {
  48 }
  49
  50 static void __init up_smp_setup(void)
  51 {
  52 }
  53
  54 static void __init up_prepare_cpus(unsigned int max_cpus)
  55 {
  56 }
  57
  58 #ifdef CONFIG_HOTPLUG_CPU
  59 static int up_cpu_disable(void)
  60 {
  61         return -ENOSYS;
  62 }
  63
  64 static void up_cpu_die(unsigned int cpu)
  65 {
  66         BUG();
  67 }
  68 #endif
  69
  70 struct plat_smp_ops up_smp_ops = {
  71         .send_ipi_single        = up_send_ipi_single,
  72         .send_ipi_mask          = up_send_ipi_mask,
  73         .init_secondary         = up_init_secondary,
  74         .smp_finish             = up_smp_finish,
  75         .cpus_done              = up_cpus_done,
  76         .boot_secondary         = up_boot_secondary,
  77         .smp_setup              = up_smp_setup,
  78         .prepare_cpus           = up_prepare_cpus,
  79 #ifdef CONFIG_HOTPLUG_CPU
  80         .cpu_disable            = up_cpu_disable,
  81         .cpu_die                = up_cpu_die,
  82 #endif
  83 };