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// SPDX-License-Identifier: GPL-2.0
/*
* SMP support for R-Mobile / SH-Mobile - r8a7779 portion
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 Magnus Damm
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/soc/renesas/rcar-sysc.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include "common.h"
#include "r8a7779.h"
#define HPBREG_BASE 0xfe700000
#define AVECR 0x0040 /* ARM Reset Vector Address Register */
#define R8A7779_SCU_BASE 0xf0000000
static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
int ret = -EIO;
cpu = cpu_logical_map(cpu);
if (cpu)
ret = rcar_sysc_power_up_cpu(cpu);
return ret;
}
static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
{
void __iomem *base;
if (!request_mem_region(0, SZ_4K, "Boot Area")) {
pr_err("Failed to request boot area\n");
return;
}
base = ioremap(HPBREG_BASE, 0x1000);
/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
writel(__pa(shmobile_boot_vector), base + AVECR);
/* setup r8a7779 specific SCU bits */
shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus);
iounmap(base);
}
#ifdef CONFIG_HOTPLUG_CPU
static int r8a7779_platform_cpu_kill(unsigned int cpu)
{
int ret = -EIO;
cpu = cpu_logical_map(cpu);
if (cpu)
ret = rcar_sysc_power_down_cpu(cpu);
return ret ? ret : 1;
}
static int r8a7779_cpu_kill(unsigned int cpu)
{
if (shmobile_smp_scu_cpu_kill(cpu))
return r8a7779_platform_cpu_kill(cpu);
return 0;
}
#endif /* CONFIG_HOTPLUG_CPU */
const struct smp_operations r8a7779_smp_ops __initconst = {
.smp_prepare_cpus = r8a7779_smp_prepare_cpus,
.smp_boot_secondary = r8a7779_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = shmobile_smp_scu_cpu_die,
.cpu_kill = r8a7779_cpu_kill,
#endif
};
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