mirror of https://gitee.com/openkylin/linux.git
83 lines
2.1 KiB
ArmAsm
83 lines
2.1 KiB
ArmAsm
/*
|
|
* 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
|