mirror of
https://github.com/FEX-Emu/linux.git
synced 2025-02-07 20:09:05 +00:00
33d5c01915
The Tegra114 is a quad cores SoC. Each core can be hotplugged including CPU0. The hotplug sequence can be controlled by setting event trigger in flow controller. Then the flow controller will take care all the power sequence that include CPU up and down. Signed-off-by: Joseph Lo <josephl@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
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/kernel.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/clk/tegra.h>
|
|
|
|
#include <asm/smp_plat.h>
|
|
|
|
#include "fuse.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 __ref tegra_cpu_die(unsigned int cpu)
|
|
{
|
|
/* Clean L1 data cache */
|
|
tegra_disable_clean_inv_dcache();
|
|
|
|
/* Shut down the current CPU. */
|
|
tegra_hotplug_shutdown();
|
|
|
|
/* Should never return here. */
|
|
BUG();
|
|
}
|
|
|
|
void __init tegra_hotplug_init(void)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
|
|
return;
|
|
|
|
if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_chip_id == TEGRA20)
|
|
tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
|
|
if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30)
|
|
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
|
|
if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114)
|
|
tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
|
|
}
|