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-rw-r--r--arch/mips/sibyte/cfe/smp.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/mips/sibyte/cfe/smp.c b/arch/mips/sibyte/cfe/smp.c
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1/*
2 * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#include <linux/init.h>
20#include <linux/sched.h>
21#include <linux/smp.h>
22#include <asm/processor.h>
23
24#include "cfe_api.h"
25#include "cfe_error.h"
26
27/*
28 * Use CFE to find out how many CPUs are available, setting up
29 * phys_cpu_present_map and the logical/physical mappings.
30 * XXXKW will the boot CPU ever not be physical 0?
31 *
32 * Common setup before any secondaries are started
33 */
34void __init prom_prepare_cpus(unsigned int max_cpus)
35{
36 int i, num;
37
38 cpus_clear(phys_cpu_present_map);
39 cpu_set(0, phys_cpu_present_map);
40 __cpu_number_map[0] = 0;
41 __cpu_logical_map[0] = 0;
42
43 for (i=1, num=0; i<NR_CPUS; i++) {
44 if (cfe_cpu_stop(i) == 0) {
45 cpu_set(i, phys_cpu_present_map);
46 __cpu_number_map[i] = ++num;
47 __cpu_logical_map[num] = i;
48 }
49 }
50 printk("Detected %i available secondary CPU(s)\n", num);
51}
52
53/*
54 * Setup the PC, SP, and GP of a secondary processor and start it
55 * running!
56 */
57void prom_boot_secondary(int cpu, struct task_struct *idle)
58{
59 int retval;
60
61 retval = cfe_cpu_start(cpu_logical_map(cpu), &smp_bootstrap,
62 __KSTK_TOS(idle),
63 (unsigned long)idle->thread_info, 0);
64 if (retval != 0)
65 printk("cfe_start_cpu(%i) returned %i\n" , cpu, retval);
66}
67
68/*
69 * Code to run on secondary just after probing the CPU
70 */
71void prom_init_secondary(void)
72{
73 extern void sb1250_smp_init(void);
74 sb1250_smp_init();
75}
76
77/*
78 * Do any tidying up before marking online and running the idle
79 * loop
80 */
81void prom_smp_finish(void)
82{
83 extern void sb1250_smp_finish(void);
84 sb1250_smp_finish();
85}
86
87/*
88 * Final cleanup after all secondaries booted
89 */
90void prom_cpus_done(void)
91{
92}