| /* |
| * Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved. |
| * Copyright (c) 2011, Google, Inc. |
| * |
| * Author: Colin Cross <ccross@android.com> |
| * Gary King <gking@nvidia.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/linkage.h> |
| |
| #include <asm/assembler.h> |
| |
| #include <mach/iomap.h> |
| |
| #include "sleep.h" |
| #include "flowctrl.h" |
| |
| #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_SLEEP) |
| /* |
| * tegra20_hotplug_shutdown(void) |
| * |
| * puts the current cpu in reset |
| * should never return |
| */ |
| ENTRY(tegra20_hotplug_shutdown) |
| /* Turn off SMP coherency */ |
| exit_smp r4, r5 |
| |
| /* Put this CPU down */ |
| cpu_id r0 |
| bl tegra20_cpu_shutdown |
| mov pc, lr @ should never get here |
| ENDPROC(tegra20_hotplug_shutdown) |
| |
| /* |
| * tegra20_cpu_shutdown(int cpu) |
| * |
| * r0 is cpu to reset |
| * |
| * puts the specified CPU in wait-for-event mode on the flow controller |
| * and puts the CPU in reset |
| * can be called on the current cpu or another cpu |
| * if called on the current cpu, does not return |
| * MUST NOT BE CALLED FOR CPU 0. |
| * |
| * corrupts r0-r3, r12 |
| */ |
| ENTRY(tegra20_cpu_shutdown) |
| cmp r0, #0 |
| moveq pc, lr @ must not be called for CPU 0 |
| |
| cpu_to_halt_reg r1, r0 |
| ldr r3, =TEGRA_FLOW_CTRL_VIRT |
| mov r2, #FLOW_CTRL_WAITEVENT | FLOW_CTRL_JTAG_RESUME |
| str r2, [r3, r1] @ put flow controller in wait event mode |
| ldr r2, [r3, r1] |
| isb |
| dsb |
| movw r1, 0x1011 |
| mov r1, r1, lsl r0 |
| ldr r3, =TEGRA_CLK_RESET_VIRT |
| str r1, [r3, #0x340] @ put slave CPU in reset |
| isb |
| dsb |
| cpu_id r3 |
| cmp r3, r0 |
| beq . |
| mov pc, lr |
| ENDPROC(tegra20_cpu_shutdown) |
| #endif |
