2 * SMP support for r8a7791
4 * Copyright (C) 2013 Renesas Solutions Corp.
5 * Copyright (C) 2013 Magnus Damm
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>
24 #include "platsmp-apmu.h"
26 #include "rcar-gen2.h"
28 static struct rcar_apmu_config r8a7791_apmu_config[] = {
30 .iomem = DEFINE_RES_MEM(0xe6152000, 0x88),
31 .cpus = { 0, 1, 2, 3 },
34 .iomem = DEFINE_RES_MEM(0xe6151000, 0x88),
35 .cpus = { 0x100, 0x0101, 0x102, 0x103 },
39 static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus)
41 /* let APMU code install data related to shmobile_boot_vector */
42 shmobile_smp_apmu_prepare_cpus(max_cpus,
44 ARRAY_SIZE(r8a7791_apmu_config));
49 static int r8a7791_smp_boot_secondary(unsigned int cpu,
50 struct task_struct *idle)
52 /* Error out when hardware debug mode is enabled */
53 if (rcar_gen2_read_mode_pins() & BIT(21)) {
54 pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu);
58 return shmobile_smp_apmu_boot_secondary(cpu, idle);
61 struct smp_operations r8a7791_smp_ops __initdata = {
62 .smp_prepare_cpus = r8a7791_smp_prepare_cpus,
63 .smp_boot_secondary = r8a7791_smp_boot_secondary,
64 #ifdef CONFIG_HOTPLUG_CPU
65 .cpu_disable = shmobile_smp_cpu_disable,
66 .cpu_die = shmobile_smp_apmu_cpu_die,
67 .cpu_kill = shmobile_smp_apmu_cpu_kill,