| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> |
| 3 | * Copyright (C) 2007-2009 PetaLogix |
| 4 | * Copyright (C) 2006 Atmark Techno, Inc. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/ftrace.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/hardirq.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/irqflags.h> |
| 17 | #include <linux/seq_file.h> |
| 18 | #include <linux/kernel_stat.h> |
| 19 | #include <linux/irq.h> |
| 20 | #include <linux/irqchip.h> |
| 21 | #include <linux/of_irq.h> |
| 22 | |
| 23 | static u32 concurrent_irq; |
| 24 | |
| 25 | void __irq_entry do_IRQ(struct pt_regs *regs) |
| 26 | { |
| 27 | unsigned int irq; |
| 28 | struct pt_regs *old_regs = set_irq_regs(regs); |
| 29 | trace_hardirqs_off(); |
| 30 | |
| 31 | irq_enter(); |
| 32 | irq = xintc_get_irq(); |
| 33 | next_irq: |
| 34 | BUG_ON(!irq); |
| 35 | generic_handle_irq(irq); |
| 36 | |
| 37 | irq = xintc_get_irq(); |
| 38 | if (irq != -1U) { |
| 39 | pr_debug("next irq: %d\n", irq); |
| 40 | ++concurrent_irq; |
| 41 | goto next_irq; |
| 42 | } |
| 43 | |
| 44 | irq_exit(); |
| 45 | set_irq_regs(old_regs); |
| 46 | trace_hardirqs_on(); |
| 47 | } |
| 48 | |
| 49 | void __init init_IRQ(void) |
| 50 | { |
| 51 | /* process the entire interrupt tree in one go */ |
| 52 | irqchip_init(); |
| 53 | } |