Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * The idle loop for all SuperH platforms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  Copyright (C) 2002 - 2009  Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/tick.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/preempt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/irqflags.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/bl_bit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static void (*sh_idle)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) void default_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	set_bl_bit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	raw_local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	/* Isn't this racy ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	cpu_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	clear_bl_bit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) void arch_cpu_idle_dead(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	play_dead();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) void arch_cpu_idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	sh_idle();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void __init select_idle_routine(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	 * If a platform has set its own idle routine, leave it alone.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	if (!sh_idle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		sh_idle = default_idle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) void stop_this_cpu(void *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	set_cpu_online(smp_processor_id(), false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	for (;;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		cpu_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }