Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-5.4 / de300974761d92f71cb583730ac9e1d4eb1b7156 / . / arch / powerpc / platforms / chrp / smp.c
blob: a800122e4dda8aa54c8af184af8e1e2a04540fce [file] [log] [blame]
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]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
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]11#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/smp.h>
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]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 <asm/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>
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]29#include <asm/machdep.h>
Paul Mackerras80579e12005-10-27 22:42:04 +1000[diff] [blame]30#include <asm/mpic.h>
Paul Mackerras44aedfe2005-11-18 15:54:12 +1100[diff] [blame]31#include <asm/rtas.h>
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]32
Michael Ellermande300972011-04-11 21:46:19 +0000[diff] [blame^]33static int __devinit smp_chrp_kick_cpu(int nr)
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]34{
35 *(unsigned long *)KERNELBASE = nr;
36 asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
Michael Ellermande300972011-04-11 21:46:19 +0000[diff] [blame^]37
38 return 0;
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]39}
40
41static void __devinit smp_chrp_setup_cpu(int cpu_nr)
42{
Paul Mackerras80579e12005-10-27 22:42:04 +1000[diff] [blame]43 mpic_setup_this_cpu();
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]44}
45
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]46/* CHRP with openpic */
47struct smp_ops_t chrp_smp_ops = {
Paul Mackerras80579e12005-10-27 22:42:04 +1000[diff] [blame]48 .message_pass = smp_mpic_message_pass,
Paul Mackerras5ad57072005-11-05 10:33:55 +1100[diff] [blame]49 .probe = smp_mpic_probe,
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]50 .kick_cpu = smp_chrp_kick_cpu,
51 .setup_cpu = smp_chrp_setup_cpu,
Benjamin Herrenschmidtc4007a22009-06-16 16:42:50 +0000[diff] [blame]52 .give_timebase = rtas_give_timebase,
53 .take_timebase = rtas_take_timebase,
Paul Mackerrasbbd0abd2005-10-26 21:45:56 +1000[diff] [blame]54};