| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /* |
| 3 | * Chained IRQ handlers support. |
| 4 | * |
| 5 | * Copyright (C) 2011 ARM Ltd. |
| 6 | */ |
| 7 | #ifndef __IRQCHIP_CHAINED_IRQ_H |
| 8 | #define __IRQCHIP_CHAINED_IRQ_H |
| 9 | |
| 10 | #include <linux/irq.h> |
| 11 | |
| 12 | /* |
| 13 | * Entry/exit functions for chained handlers where the primary IRQ chip |
| 14 | * may implement either fasteoi or level-trigger flow control. |
| 15 | */ |
| 16 | static inline void chained_irq_enter(struct irq_chip *chip, |
| 17 | struct irq_desc *desc) |
| 18 | { |
| 19 | /* FastEOI controllers require no action on entry. */ |
| 20 | if (chip->irq_eoi) |
| 21 | return; |
| 22 | |
| 23 | if (chip->irq_mask_ack) { |
| 24 | chip->irq_mask_ack(&desc->irq_data); |
| 25 | } else { |
| 26 | chip->irq_mask(&desc->irq_data); |
| 27 | if (chip->irq_ack) |
| 28 | chip->irq_ack(&desc->irq_data); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | static inline void chained_irq_exit(struct irq_chip *chip, |
| 33 | struct irq_desc *desc) |
| 34 | { |
| 35 | if (chip->irq_eoi) |
| 36 | chip->irq_eoi(&desc->irq_data); |
| 37 | else |
| 38 | chip->irq_unmask(&desc->irq_data); |
| 39 | } |
| 40 | |
| 41 | #endif /* __IRQCHIP_CHAINED_IRQ_H */ |
| 42 |