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>
20 #include <asm/smp_plat.h>
21 #include <mach/common.h>
22 #include <mach/pm-rcar.h>
23 #include <mach/r8a7790.h>
25 #define RST 0xe6160000
26 #define CA15BAR 0x0020
28 #define CA15RESCNT 0x0040
29 #define CA7RESCNT 0x0044
30 #define MERAM 0xe8080000
32 static struct rcar_sysc_ch r8a7790_ca15_scu = {
33 .chan_offs = 0x180, /* PWRSR5 .. PWRER5 */
34 .isr_bit = 12, /* CA15-SCU */
37 static struct rcar_sysc_ch r8a7790_ca7_scu = {
38 .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */
39 .isr_bit = 21, /* CA7-SCU */
42 static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
47 /* let APMU code install data related to shmobile_boot_vector */
48 shmobile_smp_apmu_prepare_cpus(max_cpus);
50 /* MERAM for jump stub, because BAR requires 256KB aligned address */
51 p = ioremap_nocache(MERAM, shmobile_boot_size);
52 memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
55 /* setup reset vectors */
56 p = ioremap_nocache(RST, 0x63);
57 bar = (MERAM >> 8) & 0xfffffc00;
58 writel_relaxed(bar, p + CA15BAR);
59 writel_relaxed(bar, p + CA7BAR);
60 writel_relaxed(bar | 0x10, p + CA15BAR);
61 writel_relaxed(bar | 0x10, p + CA7BAR);
63 /* enable clocks to all CPUs */
64 writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
66 writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
70 /* turn on power to SCU */
72 rcar_sysc_power_up(&r8a7790_ca15_scu);
73 rcar_sysc_power_up(&r8a7790_ca7_scu);
76 struct smp_operations r8a7790_smp_ops __initdata = {
77 .smp_prepare_cpus = r8a7790_smp_prepare_cpus,
78 .smp_boot_secondary = shmobile_smp_apmu_boot_secondary,
79 #ifdef CONFIG_HOTPLUG_CPU
80 .cpu_disable = shmobile_smp_cpu_disable,
81 .cpu_die = shmobile_smp_apmu_cpu_die,
82 .cpu_kill = shmobile_smp_apmu_cpu_kill,