1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright 2011 Freescale Semiconductor, Inc.
4 * Copyright 2011 Linaro Ltd.
7 #include <linux/errno.h>
8 #include <linux/jiffies.h>
9 #include <asm/cacheflush.h>
11 #include <asm/proc-fns.h>
16 * platform-specific code to shutdown a CPU
18 * Called with IRQs disabled
20 void imx_cpu_die(unsigned int cpu)
22 v7_exit_coherency_flush(louis);
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.
28 imx_set_cpu_arg(cpu, ~0);
34 int imx_cpu_kill(unsigned int cpu)
36 unsigned long timeout = jiffies + msecs_to_jiffies(50);
38 while (imx_get_cpu_arg(cpu) == 0)
39 if (time_after(jiffies, timeout))
41 imx_enable_cpu(cpu, false);
42 imx_set_cpu_arg(cpu, 0);