1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright 2011 Freescale Semiconductor, Inc.
 4 * Copyright 2011 Linaro Ltd.
 5 */
 6
 7#include <linux/errno.h>
 8#include <linux/jiffies.h>
 9#include <asm/cacheflush.h>
10#include <asm/cp15.h>
11#include <asm/proc-fns.h>
12
13#include "common.h"
14#include "hardware.h"
15
16/*
17 * platform-specific code to shutdown a CPU
18 *
19 * Called with IRQs disabled
20 */
21void imx_cpu_die(unsigned int cpu)
22{
23	v7_exit_coherency_flush(louis);
24	/*
25	 * We use the cpu jumping argument register to sync with
26	 * imx_cpu_kill() which is running on cpu0 and waiting for
27	 * the register being cleared to kill the cpu.
28	 */
29	imx_set_cpu_arg(cpu, ~0);
30
31	while (1)
32		cpu_do_idle();
33}
34
35int imx_cpu_kill(unsigned int cpu)
36{
37	unsigned long timeout = jiffies + msecs_to_jiffies(50);
38
39	while (imx_get_cpu_arg(cpu) == 0)
40		if (time_after(jiffies, timeout))
41			return 0;
42	imx_enable_cpu(cpu, false);
43	imx_set_cpu_arg(cpu, 0);
44	if (cpu_is_imx7d())
45		imx_gpcv2_set_core1_pdn_pup_by_software(true);
46	return 1;
47}

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright 2011 Freescale Semiconductor, Inc.
 4 * Copyright 2011 Linaro Ltd.
 5 */
 6
 7#include <linux/errno.h>
 8#include <linux/jiffies.h>
 9#include <asm/cacheflush.h>
10#include <asm/cp15.h>
11#include <asm/proc-fns.h>
12
13#include "common.h"
 
14
15/*
16 * platform-specific code to shutdown a CPU
17 *
18 * Called with IRQs disabled
19 */
20void imx_cpu_die(unsigned int cpu)
21{
22	v7_exit_coherency_flush(louis);
23	/*
24	 * We use the cpu jumping argument register to sync with
25	 * imx_cpu_kill() which is running on cpu0 and waiting for
26	 * the register being cleared to kill the cpu.
27	 */
28	imx_set_cpu_arg(cpu, ~0);
29
30	while (1)
31		cpu_do_idle();
32}
33
34int imx_cpu_kill(unsigned int cpu)
35{
36	unsigned long timeout = jiffies + msecs_to_jiffies(50);
37
38	while (imx_get_cpu_arg(cpu) == 0)
39		if (time_after(jiffies, timeout))
40			return 0;
41	imx_enable_cpu(cpu, false);
42	imx_set_cpu_arg(cpu, 0);
 
 
43	return 1;
44}