aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc/platforms/chrp_smp.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/platforms/chrp_smp.c')
-rw-r--r--arch/ppc/platforms/chrp_smp.c99
1 files changed, 0 insertions, 99 deletions
diff --git a/arch/ppc/platforms/chrp_smp.c b/arch/ppc/platforms/chrp_smp.c
deleted file mode 100644
index 97e539557ecb..000000000000
--- a/arch/ppc/platforms/chrp_smp.c
+++ /dev/null
@@ -1,99 +0,0 @@
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/config.h>
12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/smp.h>
15#include <linux/smp_lock.h>
16#include <linux/interrupt.h>
17#include <linux/kernel_stat.h>
18#include <linux/delay.h>
19#include <linux/init.h>
20#include <linux/spinlock.h>
21
22#include <asm/ptrace.h>
23#include <asm/atomic.h>
24#include <asm/irq.h>
25#include <asm/page.h>
26#include <asm/pgtable.h>
27#include <asm/sections.h>
28#include <asm/io.h>
29#include <asm/prom.h>
30#include <asm/smp.h>
31#include <asm/residual.h>
32#include <asm/time.h>
33#include <asm/open_pic.h>
34#include <asm/machdep.h>
35
36extern unsigned long smp_chrp_cpu_nr;
37
38static int __init
39smp_chrp_probe(void)
40{
41 if (smp_chrp_cpu_nr > 1)
42 openpic_request_IPIs();
43
44 return smp_chrp_cpu_nr;
45}
46
47static void __devinit
48smp_chrp_kick_cpu(int nr)
49{
50 *(unsigned long *)KERNELBASE = nr;
51 asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
52}
53
54static void __devinit
55smp_chrp_setup_cpu(int cpu_nr)
56{
57 if (OpenPIC_Addr)
58 do_openpic_setup_cpu();
59}
60
61static DEFINE_SPINLOCK(timebase_lock);
62static unsigned int timebase_upper = 0, timebase_lower = 0;
63
64void __devinit
65smp_chrp_give_timebase(void)
66{
67 spin_lock(&timebase_lock);
68 call_rtas("freeze-time-base", 0, 1, NULL);
69 timebase_upper = get_tbu();
70 timebase_lower = get_tbl();
71 spin_unlock(&timebase_lock);
72
73 while (timebase_upper || timebase_lower)
74 barrier();
75 call_rtas("thaw-time-base", 0, 1, NULL);
76}
77
78void __devinit
79smp_chrp_take_timebase(void)
80{
81 while (!(timebase_upper || timebase_lower))
82 barrier();
83 spin_lock(&timebase_lock);
84 set_tb(timebase_upper, timebase_lower);
85 timebase_upper = 0;
86 timebase_lower = 0;
87 spin_unlock(&timebase_lock);
88 printk("CPU %i taken timebase\n", smp_processor_id());
89}
90
91/* CHRP with openpic */
92struct smp_ops_t chrp_smp_ops = {
93 .message_pass = smp_openpic_message_pass,
94 .probe = smp_chrp_probe,
95 .kick_cpu = smp_chrp_kick_cpu,
96 .setup_cpu = smp_chrp_setup_cpu,
97 .give_timebase = smp_chrp_give_timebase,
98 .take_timebase = smp_chrp_take_timebase,
99};