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: 32c1431eea4881a6b17bd7c639315010aeefa452 authored by Linus Torvalds on 11 June 2017, 23:48:20 UTC
Linux 4.12-rc5
Linux 4.12-rc5
Tip revision: 32c1431
hotplug.c
/*
* Copyright (C) 2002 ARM Ltd.
* All Rights Reserved
* Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk/tegra.h>
#include <linux/kernel.h>
#include <linux/smp.h>
#include <soc/tegra/common.h>
#include <soc/tegra/fuse.h>
#include <asm/smp_plat.h>
#include "common.h"
#include "sleep.h"
static void (*tegra_hotplug_shutdown)(void);
int tegra_cpu_kill(unsigned cpu)
{
cpu = cpu_logical_map(cpu);
/* Clock gate the CPU */
tegra_wait_cpu_in_reset(cpu);
tegra_disable_cpu_clock(cpu);
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void tegra_cpu_die(unsigned int cpu)
{
if (!tegra_hotplug_shutdown) {
WARN(1, "hotplug is not yet initialized\n");
return;
}
/* Clean L1 data cache */
tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
/* Shut down the current CPU. */
tegra_hotplug_shutdown();
/* Should never return here. */
BUG();
}
static int __init tegra_hotplug_init(void)
{
if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
return 0;
if (!soc_is_tegra())
return 0;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20)
tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30)
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114)
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124)
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
return 0;
}
pure_initcall(tegra_hotplug_init);