https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 09688c0166e76ce2fb85e86b9d99be8b0084cdf9 authored by Linus Torvalds on 13 March 2022, 20:23:37 UTC
Linux 5.17-rc8
Linux 5.17-rc8
Tip revision: 09688c0
smp-emev2.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,
};