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/arch/powerpc/platforms/chrp/smp.c

http://github.com/mirrors/linux
C | 55 lines | 38 code | 6 blank | 11 comment | 0 complexity | ad76fd92190e804dc700e1b659cb61aa MD5 | raw file
 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Smp support for CHRP machines.
 4 *
 5 * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
 6 * deal of code from the sparc and intel versions.
 7 *
 8 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
 9 *
10 */
11
12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/smp.h>
15#include <linux/interrupt.h>
16#include <linux/kernel_stat.h>
17#include <linux/delay.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 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 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	.cause_nmi_ipi = NULL,
49	.message_pass = smp_mpic_message_pass,
50	.probe = smp_mpic_probe,
51	.kick_cpu = smp_chrp_kick_cpu,
52	.setup_cpu = smp_chrp_setup_cpu,
53	.give_timebase = rtas_give_timebase,
54	.take_timebase = rtas_take_timebase,
55};