Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2007-2009 PetaLogix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (C) 2006 Atmark Techno, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/hardirq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/irqflags.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/irqchip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static u32 concurrent_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) void __irq_entry do_IRQ(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	unsigned int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	struct pt_regs *old_regs = set_irq_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	trace_hardirqs_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	irq_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	irq = xintc_get_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) next_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	BUG_ON(!irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	generic_handle_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	irq = xintc_get_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	if (irq != -1U) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		pr_debug("next irq: %d\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		++concurrent_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		goto next_irq;
^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) 	irq_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	set_irq_regs(old_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	trace_hardirqs_on();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) void __init init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	/* process the entire interrupt tree in one go */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	irqchip_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }