projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1cea7326 | 1 | /* |
| 1cea7326 CC |
2 | * Copyright (C) 2002 ARM Ltd. |
| 3 | * All Rights Reserved | |
| 7469688e | 4 | * Copyright (c) 2010, 2012-2013, NVIDIA Corporation. All rights reserved. |
| 1cea7326 CC |
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 | */ | |
| a0524acc TR |
10 | |
| 11 | #include <linux/clk/tegra.h> | |
| 1cea7326 | 12 | #include <linux/kernel.h> |
| 1cea7326 | 13 | #include <linux/smp.h> |
| 1cea7326 | 14 | |
| 05ccf196 | 15 | #include <soc/tegra/common.h> |
| 304664ea TR |
16 | #include <soc/tegra/fuse.h> |
| 17 | ||
| 59b0f682 | 18 | #include <asm/smp_plat.h> |
| 1cea7326 | 19 | |
| 5c753e04 | 20 | #include "common.h" |
| 59b0f682 | 21 | #include "sleep.h" |
| 1cea7326 | 22 | |
| 59b0f682 | 23 | static void (*tegra_hotplug_shutdown)(void); |
| 1cea7326 | 24 | |
| b8119431 JL |
25 | int tegra_cpu_kill(unsigned cpu) |
| 26 | { | |
| 27 | cpu = cpu_logical_map(cpu); | |
| 28 | ||
| 29 | /* Clock gate the CPU */ | |
| 30 | tegra_wait_cpu_in_reset(cpu); | |
| 31 | tegra_disable_cpu_clock(cpu); | |
| 32 | ||
| 33 | return 1; | |
| 34 | } | |
| 35 | ||
| 1cea7326 CC |
36 | /* |
| 37 | * platform-specific code to shutdown a CPU | |
| 38 | * | |
| 39 | * Called with IRQs disabled | |
| 40 | */ | |
| b96fc2f3 | 41 | void tegra_cpu_die(unsigned int cpu) |
| 1cea7326 | 42 | { |
| 05ccf196 TR |
43 | if (!tegra_hotplug_shutdown) { |
| 44 | WARN(1, "hotplug is not yet initialized\n"); | |
| 45 | return; | |
| 46 | } | |
| 47 | ||
| 57886616 | 48 | /* Clean L1 data cache */ |
| ac2527bf | 49 | tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS); |
| 1cea7326 | 50 | |
| 59b0f682 JL |
51 | /* Shut down the current CPU. */ |
| 52 | tegra_hotplug_shutdown(); | |
| 53 | ||
| 59b0f682 JL |
54 | /* Should never return here. */ |
| 55 | BUG(); | |
| 1cea7326 CC |
56 | } |
| 57 | ||
| 05ccf196 | 58 | static int __init tegra_hotplug_init(void) |
| 453689e4 | 59 | { |
| 7469688e | 60 | if (!IS_ENABLED(CONFIG_HOTPLUG_CPU)) |
| 05ccf196 TR |
61 | return 0; |
| 62 | ||
| 63 | if (!soc_is_tegra()) | |
| 64 | return 0; | |
| 453689e4 | 65 | |
| 304664ea | 66 | if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && tegra_get_chip_id() == TEGRA20) |
| 7469688e | 67 | tegra_hotplug_shutdown = tegra20_hotplug_shutdown; |
| 304664ea | 68 | if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_get_chip_id() == TEGRA30) |
| 7469688e | 69 | tegra_hotplug_shutdown = tegra30_hotplug_shutdown; |
| 304664ea | 70 | if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_get_chip_id() == TEGRA114) |
| 33d5c019 | 71 | tegra_hotplug_shutdown = tegra30_hotplug_shutdown; |
| 304664ea | 72 | if (IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC) && tegra_get_chip_id() == TEGRA124) |
| 9997e626 | 73 | tegra_hotplug_shutdown = tegra30_hotplug_shutdown; |
| 05ccf196 TR |
74 | |
| 75 | return 0; | |
| 59b0f682 | 76 | } |
| 05ccf196 | 77 | pure_initcall(tegra_hotplug_init); |