1 // SPDX-License-Identifier: GPL-2.0
3 * SMP support for R-Mobile / SH-Mobile - r8a7779 portion
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Copyright (C) 2011 Magnus Damm
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/smp.h>
11 #include <linux/spinlock.h>
13 #include <linux/delay.h>
14 #include <linux/soc/renesas/rcar-sysc.h>
16 #include <asm/cacheflush.h>
17 #include <asm/smp_plat.h>
18 #include <asm/smp_scu.h>
23 #define AVECR IOMEM(0xfe700040)
24 #define R8A7779_SCU_BASE 0xf0000000
26 static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
30 cpu = cpu_logical_map(cpu);
32 ret = rcar_sysc_power_up_cpu(cpu);
37 static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
39 /* Map the reset vector (in headsmp-scu.S, headsmp.S) */
40 __raw_writel(__pa(shmobile_boot_vector), AVECR);
42 /* setup r8a7779 specific SCU bits */
43 shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus);
46 #ifdef CONFIG_HOTPLUG_CPU
47 static int r8a7779_platform_cpu_kill(unsigned int cpu)
51 cpu = cpu_logical_map(cpu);
53 ret = rcar_sysc_power_down_cpu(cpu);
58 static int r8a7779_cpu_kill(unsigned int cpu)
60 if (shmobile_smp_scu_cpu_kill(cpu))
61 return r8a7779_platform_cpu_kill(cpu);
65 #endif /* CONFIG_HOTPLUG_CPU */
67 const struct smp_operations r8a7779_smp_ops __initconst = {
68 .smp_prepare_cpus = r8a7779_smp_prepare_cpus,
69 .smp_boot_secondary = r8a7779_boot_secondary,
70 #ifdef CONFIG_HOTPLUG_CPU
71 .cpu_die = shmobile_smp_scu_cpu_die,
72 .cpu_kill = r8a7779_cpu_kill,