Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / powerpc / platforms / chrp / smp.c
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/spinlock.h>
18
19 #include <asm/ptrace.h>
20 #include <linux/atomic.h>
21 #include <asm/irq.h>
22 #include <asm/page.h>
23 #include <asm/pgtable.h>
24 #include <asm/sections.h>
25 #include <asm/io.h>
26 #include <asm/prom.h>
27 #include <asm/smp.h>
28 #include <asm/machdep.h>
29 #include <asm/mpic.h>
30 #include <asm/rtas.h>
31
32 static int smp_chrp_kick_cpu(int nr)
33 {
34         *(unsigned long *)KERNELBASE = nr;
35         asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
36
37         return 0;
38 }
39
40 static void smp_chrp_setup_cpu(int cpu_nr)
41 {
42         mpic_setup_this_cpu();
43 }
44
45 /* CHRP with openpic */
46 struct smp_ops_t chrp_smp_ops = {
47         .message_pass = smp_mpic_message_pass,
48         .probe = smp_mpic_probe,
49         .kick_cpu = smp_chrp_kick_cpu,
50         .setup_cpu = smp_chrp_setup_cpu,
51         .give_timebase = rtas_give_timebase,
52         .take_timebase = rtas_take_timebase,
53 };