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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* SMP support for R-Mobile / SH-Mobile - r8a7779 portion
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 Magnus Damm
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that 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.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include "common.h"
#include "pm-rcar.h"
#include "r8a7779.h"
#define AVECR IOMEM(0xfe700040)
#define R8A7779_SCU_BASE 0xf0000000
static const struct rcar_sysc_ch r8a7779_ch_cpu1 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 1, /* ARM1 */
.isr_bit = 1, /* ARM1 */
};
static const struct rcar_sysc_ch r8a7779_ch_cpu2 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 2, /* ARM2 */
.isr_bit = 2, /* ARM2 */
};
static const struct rcar_sysc_ch r8a7779_ch_cpu3 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 3, /* ARM3 */
.isr_bit = 3, /* ARM3 */
};
static const struct rcar_sysc_ch * const r8a7779_ch_cpu[4] = {
[1] = &r8a7779_ch_cpu1,
[2] = &r8a7779_ch_cpu2,
[3] = &r8a7779_ch_cpu3,
};
static int r8a7779_platform_cpu_kill(unsigned int cpu)
{
const struct rcar_sysc_ch *ch = NULL;
int ret = -EIO;
cpu = cpu_logical_map(cpu);
if (cpu < ARRAY_SIZE(r8a7779_ch_cpu))
ch = r8a7779_ch_cpu[cpu];
if (ch)
ret = rcar_sysc_power_down(ch);
return ret ? ret : 1;
}
static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
const struct rcar_sysc_ch *ch = NULL;
unsigned int lcpu = cpu_logical_map(cpu);
int ret;
if (lcpu < ARRAY_SIZE(r8a7779_ch_cpu))
ch = r8a7779_ch_cpu[lcpu];
if (ch)
ret = rcar_sysc_power_up(ch);
else
ret = -EIO;
return ret;
}
static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
{
/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
__raw_writel(__pa(shmobile_boot_vector), AVECR);
/* setup r8a7779 specific SCU bits */
shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus);
r8a7779_pm_init();
/* power off secondary CPUs */
r8a7779_platform_cpu_kill(1);
r8a7779_platform_cpu_kill(2);
r8a7779_platform_cpu_kill(3);
}
#ifdef CONFIG_HOTPLUG_CPU
static int r8a7779_cpu_kill(unsigned int cpu)
{
if (shmobile_smp_scu_cpu_kill(cpu))
return r8a7779_platform_cpu_kill(cpu);
return 0;
}
#endif /* CONFIG_HOTPLUG_CPU */
const struct smp_operations r8a7779_smp_ops __initconst = {
.smp_prepare_cpus = r8a7779_smp_prepare_cpus,
.smp_boot_secondary = r8a7779_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = shmobile_smp_scu_cpu_die,
.cpu_kill = r8a7779_cpu_kill,
#endif
};
|
