1 /*
2 * SMP support for r8a7790
3 *
4 * Copyright (C) 2012-2013 Renesas Solutions Corp.
5 * Copyright (C) 2012 Takashi Yoshii <takashi.yoshii.ze@renesas.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/smp.h>
19 #include <linux/io.h>
20
21 #include <asm/smp_plat.h>
22
23 #include "common.h"
24 #include "platsmp-apmu.h"
25 #include "pm-rcar.h"
26 #include "rcar-gen2.h"
27 #include "r8a7790.h"
28
29 static const struct rcar_sysc_ch r8a7790_ca15_scu = {
30 .chan_offs = 0x180, /* PWRSR5 .. PWRER5 */
31 .isr_bit = 12, /* CA15-SCU */
32 };
33
34 static const struct rcar_sysc_ch r8a7790_ca7_scu = {
35 .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
36 .isr_bit = 21, /* CA7-SCU */
37 };
38
39 static struct rcar_apmu_config r8a7790_apmu_config[] = {
40 {
41 .iomem = DEFINE_RES_MEM(0xe6152000, 0x188),
42 .cpus = { 0, 1, 2, 3 },
43 },
44 {
45 .iomem = DEFINE_RES_MEM(0xe6151000, 0x188),
46 .cpus = { 0x100, 0x0101, 0x102, 0x103 },
47 }
48 };
49
r8a7790_smp_prepare_cpus(unsigned int max_cpus)50 static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
51 {
52 /* let APMU code install data related to shmobile_boot_vector */
53 shmobile_smp_apmu_prepare_cpus(max_cpus,
54 r8a7790_apmu_config,
55 ARRAY_SIZE(r8a7790_apmu_config));
56
57 /* turn on power to SCU */
58 rcar_gen2_pm_init();
59 rcar_sysc_power_up(&r8a7790_ca15_scu);
60 rcar_sysc_power_up(&r8a7790_ca7_scu);
61 }
62
63 struct smp_operations r8a7790_smp_ops __initdata = {
64 .smp_prepare_cpus = r8a7790_smp_prepare_cpus,
65 .smp_boot_secondary = shmobile_smp_apmu_boot_secondary,
66 #ifdef CONFIG_HOTPLUG_CPU
67 .cpu_can_disable = shmobile_smp_cpu_can_disable,
68 .cpu_die = shmobile_smp_apmu_cpu_die,
69 .cpu_kill = shmobile_smp_apmu_cpu_kill,
70 #endif
71 };
72