mirror of https://gitee.com/openkylin/linux.git
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
|
|
* SMP support for r8a7791
|
|
*
|
|
* Copyright (C) 2013 Renesas Solutions Corp.
|
|
* Copyright (C) 2013 Magnus Damm
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/smp_plat.h>
|
|
|
|
#include "common.h"
|
|
#include "platsmp-apmu.h"
|
|
#include "r8a7791.h"
|
|
#include "rcar-gen2.h"
|
|
|
|
static struct rcar_apmu_config r8a7791_apmu_config[] = {
|
|
{
|
|
.iomem = DEFINE_RES_MEM(0xe6152000, 0x188),
|
|
.cpus = { 0, 1 },
|
|
}
|
|
};
|
|
|
|
static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
/* let APMU code install data related to shmobile_boot_vector */
|
|
shmobile_smp_apmu_prepare_cpus(max_cpus,
|
|
r8a7791_apmu_config,
|
|
ARRAY_SIZE(r8a7791_apmu_config));
|
|
|
|
rcar_gen2_pm_init();
|
|
}
|
|
|
|
static int r8a7791_smp_boot_secondary(unsigned int cpu,
|
|
struct task_struct *idle)
|
|
{
|
|
/* Error out when hardware debug mode is enabled */
|
|
if (rcar_gen2_read_mode_pins() & BIT(21)) {
|
|
pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
return shmobile_smp_apmu_boot_secondary(cpu, idle);
|
|
}
|
|
|
|
const struct smp_operations r8a7791_smp_ops __initconst = {
|
|
.smp_prepare_cpus = r8a7791_smp_prepare_cpus,
|
|
.smp_boot_secondary = r8a7791_smp_boot_secondary,
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
.cpu_can_disable = shmobile_smp_cpu_can_disable,
|
|
.cpu_die = shmobile_smp_apmu_cpu_die,
|
|
.cpu_kill = shmobile_smp_apmu_cpu_kill,
|
|
#endif
|
|
};
|