38ab13441c
Now that the genirq code provides an IRQ bitmap of its own and the necessary API to manipulate it, there's no need to keep our own version around anymore. In the process we kill off some unused IRQ reservation code, with future users now having to tie in to the genirq API as normal. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/*
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* Dynamic IRQ management
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*
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* Copyright (C) 2010 Paul Mundt
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*
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* Modelled after arch/x86/kernel/apic/io_apic.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#define pr_fmt(fmt) "intc: " fmt
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#include <linux/irq.h>
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#include <linux/bitmap.h>
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#include <linux/spinlock.h>
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#include "internals.h" /* only for activate_irq() damage.. */
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/*
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* The IRQ bitmap provides a global map of bound IRQ vectors for a
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* given platform. Allocation of IRQs are either static through the CPU
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* vector map, or dynamic in the case of board mux vectors or MSI.
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*
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* As this is a central point for all IRQ controllers on the system,
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* each of the available sources are mapped out here. This combined with
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* sparseirq makes it quite trivial to keep the vector map tightly packed
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* when dynamically creating IRQs, as well as tying in to otherwise
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* unused irq_desc positions in the sparse array.
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*/
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/*
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* Dynamic IRQ allocation and deallocation
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*/
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unsigned int create_irq_nr(unsigned int irq_want, int node)
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{
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int irq = irq_alloc_desc_at(irq_want, node);
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if (irq < 0)
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return 0;
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activate_irq(irq);
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return irq;
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}
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int create_irq(void)
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{
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int irq = irq_alloc_desc(numa_node_id());
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if (irq >= 0)
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activate_irq(irq);
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return irq;
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}
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void destroy_irq(unsigned int irq)
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{
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irq_free_desc(irq);
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}
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void reserve_intc_vectors(struct intc_vect *vectors, unsigned int nr_vecs)
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{
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int i;
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for (i = 0; i < nr_vecs; i++)
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irq_reserve_irqs(evt2irq(vectors[i].vect), 1);
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}
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