5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
45 lines
915 B
C
45 lines
915 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright 2011 Freescale Semiconductor, Inc.
|
|
* Copyright 2011 Linaro Ltd.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/jiffies.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/cp15.h>
|
|
#include <asm/proc-fns.h>
|
|
|
|
#include "common.h"
|
|
|
|
/*
|
|
* platform-specific code to shutdown a CPU
|
|
*
|
|
* Called with IRQs disabled
|
|
*/
|
|
void imx_cpu_die(unsigned int cpu)
|
|
{
|
|
v7_exit_coherency_flush(louis);
|
|
/*
|
|
* We use the cpu jumping argument register to sync with
|
|
* imx_cpu_kill() which is running on cpu0 and waiting for
|
|
* the register being cleared to kill the cpu.
|
|
*/
|
|
imx_set_cpu_arg(cpu, ~0);
|
|
|
|
while (1)
|
|
cpu_do_idle();
|
|
}
|
|
|
|
int imx_cpu_kill(unsigned int cpu)
|
|
{
|
|
unsigned long timeout = jiffies + msecs_to_jiffies(50);
|
|
|
|
while (imx_get_cpu_arg(cpu) == 0)
|
|
if (time_after(jiffies, timeout))
|
|
return 0;
|
|
imx_enable_cpu(cpu, false);
|
|
imx_set_cpu_arg(cpu, 0);
|
|
return 1;
|
|
}
|