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 <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>
29 #include <asm/machdep.h>
30 #include <asm/mpic.h>
31 #include <asm/rtas.h>
32 
smp_chrp_kick_cpu(int nr)33 static void __devinit smp_chrp_kick_cpu(int nr)
34 {
35 	*(unsigned long *)KERNELBASE = nr;
36 	asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
37 }
38 
smp_chrp_setup_cpu(int cpu_nr)39 static void __devinit smp_chrp_setup_cpu(int cpu_nr)
40 {
41 	mpic_setup_this_cpu();
42 }
43 
44 /* CHRP with openpic */
45 struct smp_ops_t chrp_smp_ops = {
46 	.message_pass = smp_mpic_message_pass,
47 	.probe = smp_mpic_probe,
48 	.kick_cpu = smp_chrp_kick_cpu,
49 	.setup_cpu = smp_chrp_setup_cpu,
50 	.give_timebase = rtas_give_timebase,
51 	.take_timebase = rtas_take_timebase,
52 };
53