2 * SMP support for r8a7790
4 * Copyright (C) 2012-2013 Renesas Solutions Corp.
5 * Copyright (C) 2012 Takashi Yoshii <takashi.yoshii.ze@renesas.com>
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.
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.
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/smp.h>
21 #include <asm/smp_plat.h>
27 #define RST 0xe6160000
28 #define CA15BAR 0x0020
30 #define CA15RESCNT 0x0040
31 #define CA7RESCNT 0x0044
32 #define MERAM 0xe8080000
34 static struct rcar_sysc_ch r8a7790_ca15_scu = {
35 .chan_offs = 0x180, /* PWRSR5 .. PWRER5 */
36 .isr_bit = 12, /* CA15-SCU */
39 static struct rcar_sysc_ch r8a7790_ca7_scu = {
40 .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
41 .isr_bit = 21, /* CA7-SCU */
44 static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
49 /* let APMU code install data related to shmobile_boot_vector */
50 shmobile_smp_apmu_prepare_cpus(max_cpus);
52 /* MERAM for jump stub, because BAR requires 256KB aligned address */
53 p = ioremap_nocache(MERAM, shmobile_boot_size);
54 memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
57 /* setup reset vectors */
58 p = ioremap_nocache(RST, 0x63);
59 bar = (MERAM >> 8) & 0xfffffc00;
60 writel_relaxed(bar, p + CA15BAR);
61 writel_relaxed(bar, p + CA7BAR);
62 writel_relaxed(bar | 0x10, p + CA15BAR);
63 writel_relaxed(bar | 0x10, p + CA7BAR);
65 /* enable clocks to all CPUs */
66 writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
68 writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
72 /* turn on power to SCU */
74 shmobile_smp_apmu_suspend_init();
75 rcar_sysc_power_up(&r8a7790_ca15_scu);
76 rcar_sysc_power_up(&r8a7790_ca7_scu);
79 struct smp_operations r8a7790_smp_ops __initdata = {
80 .smp_prepare_cpus = r8a7790_smp_prepare_cpus,
81 .smp_boot_secondary = shmobile_smp_apmu_boot_secondary,
82 #ifdef CONFIG_HOTPLUG_CPU
83 .cpu_disable = shmobile_smp_cpu_disable,
84 .cpu_die = shmobile_smp_apmu_cpu_die,
85 .cpu_kill = shmobile_smp_apmu_cpu_kill,