linux/arch/powerpc/platforms/chrp/smp.c
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   1/*
   2 * Smp support for CHRP machines.
   3 *
   4 * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
   5 * deal of code from the sparc and intel versions.
   6 *
   7 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   8 *
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/sched.h>
  13#include <linux/smp.h>
  14#include <linux/interrupt.h>
  15#include <linux/kernel_stat.h>
  16#include <linux/delay.h>
  17#include <linux/init.h>
  18#include <linux/spinlock.h>
  19
  20#include <asm/ptrace.h>
  21#include <linux/atomic.h>
  22#include <asm/irq.h>
  23#include <asm/page.h>
  24#include <asm/pgtable.h>
  25#include <asm/sections.h>
  26#include <asm/io.h>
  27#include <asm/prom.h>
  28#include <asm/smp.h>
  29#include <asm/machdep.h>
  30#include <asm/mpic.h>
  31#include <asm/rtas.h>
  32
  33static int __devinit smp_chrp_kick_cpu(int nr)
  34{
  35        *(unsigned long *)KERNELBASE = nr;
  36        asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
  37
  38        return 0;
  39}
  40
  41static void __devinit smp_chrp_setup_cpu(int cpu_nr)
  42{
  43        mpic_setup_this_cpu();
  44}
  45
  46/* CHRP with openpic */
  47struct smp_ops_t chrp_smp_ops = {
  48        .message_pass = smp_mpic_message_pass,
  49        .probe = smp_mpic_probe,
  50        .kick_cpu = smp_chrp_kick_cpu,
  51        .setup_cpu = smp_chrp_setup_cpu,
  52        .give_timebase = rtas_give_timebase,
  53        .take_timebase = rtas_take_timebase,
  54};
  55