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: fb33c6510d5595144d585aa194d377cf74d31911 authored by Linus Torvalds on 15 March 2020, 22:01:23 UTC
Linux 5.6-rc6
Linux 5.6-rc6
Tip revision: fb33c65
smp-sh73a0.c
// SPDX-License-Identifier: GPL-2.0
/*
* SMP support for R-Mobile / SH-Mobile - sh73a0 portion
*
* Copyright (C) 2010 Magnus Damm
* Copyright (C) 2010 Takashi Yoshii
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <asm/smp_plat.h>
#include "common.h"
#include "sh73a0.h"
#define WUPCR IOMEM(0xe6151010)
#define SRESCR IOMEM(0xe6151018)
#define PSTR IOMEM(0xe6151040)
#define SBAR IOMEM(0xe6180020)
#define APARMBAREA IOMEM(0xe6f10020)
#define SH73A0_SCU_BASE 0xf0000000
static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned int lcpu = cpu_logical_map(cpu);
if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3)
__raw_writel(1 << lcpu, WUPCR); /* wake up */
else
__raw_writel(1 << lcpu, SRESCR); /* reset */
return 0;
}
static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
{
/* Map the reset vector (in headsmp.S) */
__raw_writel(0, APARMBAREA); /* 4k */
__raw_writel(__pa(shmobile_boot_vector), SBAR);
/* setup sh73a0 specific SCU bits */
shmobile_smp_scu_prepare_cpus(SH73A0_SCU_BASE, max_cpus);
}
const struct smp_operations sh73a0_smp_ops __initconst = {
.smp_prepare_cpus = sh73a0_smp_prepare_cpus,
.smp_boot_secondary = sh73a0_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_can_disable = shmobile_smp_cpu_can_disable,
.cpu_die = shmobile_smp_scu_cpu_die,
.cpu_kill = shmobile_smp_scu_cpu_kill,
#endif
};