Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright 2011 Freescale Semiconductor, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright 2011 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/cp15.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/proc-fns.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * platform-specific code to shutdown a CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * Called with IRQs disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) void imx_cpu_die(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	v7_exit_coherency_flush(louis);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 * We use the cpu jumping argument register to sync with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 * imx_cpu_kill() which is running on cpu0 and waiting for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 * the register being cleared to kill the cpu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	imx_set_cpu_arg(cpu, ~0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	while (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		cpu_do_idle();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int imx_cpu_kill(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	unsigned long timeout = jiffies + msecs_to_jiffies(50);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	while (imx_get_cpu_arg(cpu) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		if (time_after(jiffies, timeout))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	imx_enable_cpu(cpu, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	imx_set_cpu_arg(cpu, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }