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https://github.com/projectacrn/acrn-hypervisor.git
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2c044e0c4e
This commit refactors vector allocation/free codes, two functions are
defined to help alloc/free vectors for an irq:
- uint32_t alloc_irq_vector(uint32_t irq)
- alloc a free vector (0x20 ~ 0xDF), and bind it to irq, for legacy irqs
and static mapped irqs, vector has been allocated and bind, so just
check the mapping correctness;
- return: valid vector on success, VECTOR_INVALID on failure.
- void free_irq_vector(uint32_t irq)
- free vector allocated via alloc_irq_vector(), for legacy irqs and static
mapped irqs, nothing need to do.
Signed-off-by: Yan, Like <like.yan@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef COMMON_IRQ_H
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#define COMMON_IRQ_H
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enum irq_mode {
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IRQ_PULSE,
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IRQ_ASSERT,
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IRQ_DEASSERT,
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};
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enum irq_use_state {
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IRQ_NOT_ASSIGNED = 0,
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IRQ_ASSIGNED,
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};
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typedef int (*irq_action_t)(uint32_t irq, void *priv_data);
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/* any field change in below required irq_lock protection with irqsave */
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struct irq_desc {
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uint32_t irq; /* index to irq_desc_base */
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enum irq_use_state used; /* this irq have assigned to device */
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uint32_t vector; /* assigned vector */
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int (*irq_handler)(struct irq_desc *irq_desc, void *handler_data);
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/* callback for irq flow handling */
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irq_action_t action; /* callback registered from component */
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void *priv_data; /* irq_action private data */
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spinlock_t lock;
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};
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int32_t request_irq(uint32_t irq,
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irq_action_t action_fn,
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void *priv_data);
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void free_irq(uint32_t irq);
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typedef int (*irq_handler_t)(struct irq_desc *desc, void *handler_data);
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void update_irq_handler(uint32_t irq, irq_handler_t func);
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#endif /* COMMON_IRQ_H */
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