| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | |
| 20 | static void (*tegra_hotplug_shutdown)(void); |
| 21 | |
| 22 | int 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 | */ |
| 38 | void 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 | |
| 55 | static 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 | } |
| 74 | pure_initcall(tegra_hotplug_init); |