1/*
2 *  Copyright (C) 2002 ARM Ltd.
3 *  All Rights Reserved
4 *  Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/clk/tegra.h>
12#include <linux/kernel.h>
13#include <linux/smp.h>
14
15#include <soc/tegra/common.h>
16#include <soc/tegra/fuse.h>
17
18#include <asm/smp_plat.h>
19
20#include "sleep.h"
21
22static void (*tegra_hotplug_shutdown)(void);
23
24int tegra_cpu_kill(unsigned cpu)
25{
26	cpu = cpu_logical_map(cpu);
27
28	/* Clock gate the CPU */
29	tegra_wait_cpu_in_reset(cpu);
30	tegra_disable_cpu_clock(cpu);
31
32	return 1;
33}
34
35/*
36 * platform-specific code to shutdown a CPU
37 *
38 * Called with IRQs disabled
39 */
40void tegra_cpu_die(unsigned int cpu)
41{
42	if (!tegra_hotplug_shutdown) {
43		WARN(1, "hotplug is not yet initialized\n");
44		return;
45	}
46
47	/* Clean L1 data cache */
48	tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
49
50	/* Shut down the current CPU. */
51	tegra_hotplug_shutdown();
52
53	/* Should never return here. */
54	BUG();
55}
56
57static int __init tegra_hotplug_init(void)
58{
59	if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
60		return 0;
61
62	if (!soc_is_tegra())
63		return 0;
64
65	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20)
66		tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
67	if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30)
68		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
69	if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114)
70		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
71	if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124)
72		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
73
74	return 0;
75}
76pure_initcall(tegra_hotplug_init);
77