1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* Copyright 2010-2011 Calxeda, Inc.
* Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <asm/smp_scu.h>
#include <asm/hardware/gic.h>
#include "core.h"
extern void secondary_startup(void);
static void __cpuinit highbank_secondary_init(unsigned int cpu)
{
gic_secondary_init(0);
}
static int __cpuinit highbank_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
highbank_set_cpu_jump(cpu, secondary_startup);
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
return 0;
}
/*
* Initialise the CPU possible map early - this describes the CPUs
* which may be present or become present in the system.
*/
static void __init highbank_smp_init_cpus(void)
{
unsigned int i, ncores = 4;
/* sanity check */
if (ncores > NR_CPUS) {
printk(KERN_WARNING
"highbank: no. of cores (%d) greater than configured "
"maximum of %d - clipping\n",
ncores, NR_CPUS);
ncores = NR_CPUS;
}
for (i = 0; i < ncores; i++)
set_cpu_possible(i, true);
}
static void __init highbank_smp_prepare_cpus(unsigned int max_cpus)
{
if (scu_base_addr)
scu_enable(scu_base_addr);
}
struct smp_operations highbank_smp_ops __initdata = {
.smp_init_cpus = highbank_smp_init_cpus,
.smp_prepare_cpus = highbank_smp_prepare_cpus,
.smp_secondary_init = highbank_secondary_init,
.smp_boot_secondary = highbank_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = highbank_cpu_die,
#endif
};
|
