49 строки
1.2 KiB
C
49 строки
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* SMP support for Emma Mobile EV2
|
|
*
|
|
* Copyright (C) 2012 Renesas Solutions Corp.
|
|
* Copyright (C) 2012 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 <asm/smp_plat.h>
|
|
#include <asm/smp_scu.h>
|
|
|
|
#include "common.h"
|
|
#include "emev2.h"
|
|
|
|
#define EMEV2_SCU_BASE 0x1e000000
|
|
#define EMEV2_SMU_BASE 0xe0110000
|
|
#define SMU_GENERAL_REG0 0x7c0
|
|
|
|
static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle)
|
|
{
|
|
arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu)));
|
|
return 0;
|
|
}
|
|
|
|
static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
void __iomem *smu;
|
|
|
|
/* Tell ROM loader about our vector (in headsmp.S) */
|
|
smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE);
|
|
if (smu) {
|
|
iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0);
|
|
iounmap(smu);
|
|
}
|
|
|
|
/* setup EMEV2 specific SCU bits */
|
|
shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus);
|
|
}
|
|
|
|
const struct smp_operations emev2_smp_ops __initconst = {
|
|
.smp_prepare_cpus = emev2_smp_prepare_cpus,
|
|
.smp_boot_secondary = emev2_boot_secondary,
|
|
};
|