1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *  Copyright (C) 2002 ARM Ltd.
4 *  All Rights Reserved
5 *  Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved.
6 */
7
8#include <linux/clk/tegra.h>
9#include <linux/kernel.h>
10#include <linux/smp.h>
11
12#include <soc/tegra/common.h>
13#include <soc/tegra/fuse.h>
14
15#include <asm/smp_plat.h>
16
17#include "common.h"
18#include "sleep.h"
19
20static void (*tegra_hotplug_shutdown)(void);
21
22int tegra_cpu_kill(unsigned cpu)
23{
24	cpu = cpu_logical_map(cpu);
25
26	/* Clock gate the CPU */
27	tegra_wait_cpu_in_reset(cpu);
28	tegra_disable_cpu_clock(cpu);
29
30	return 1;
31}
32
33/*
34 * platform-specific code to shutdown a CPU
35 *
36 * Called with IRQs disabled
37 */
38void tegra_cpu_die(unsigned int cpu)
39{
40	if (!tegra_hotplug_shutdown) {
41		WARN(1, "hotplug is not yet initialized\n");
42		return;
43	}
44
45	/* Clean L1 data cache */
46	tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
47
48	/* Shut down the current CPU. */
49	tegra_hotplug_shutdown();
50
51	/* Should never return here. */
52	BUG();
53}
54
55static int __init tegra_hotplug_init(void)
56{
57	if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
58		return 0;
59
60	if (!soc_is_tegra())
61		return 0;
62
63	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20)
64		tegra_hotplug_shutdown = tegra20_hotplug_shutdown;
65	if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30)
66		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
67	if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114)
68		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
69	if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124)
70		tegra_hotplug_shutdown = tegra30_hotplug_shutdown;
71
72	return 0;
73}
74pure_initcall(tegra_hotplug_init);
75