118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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Copyright 2025 Kamil Kowalczyk
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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“AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <libk/types.h>
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#include <libk/list.h>
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#include <mm/liballoc.h>
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#include <irq/irqhandler.h>
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#include <sync/spinlock.h>
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#include <config.h>
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#if defined(__i386__)
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#include <sys/pic.h>
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#endif
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static struct irqhandlers irqhandlers = { .handlers = NULL };
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void irqhandlers_init(void) {
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sl_init(&irqhandlers.sl, "irqhandlers");
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}
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void irqhandler_register(int irq, irqhandler_func_t func) {
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struct irqhandler *irqhandler = malloc(sizeof(*irqhandler));
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if (irqhandler == NULL)
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goto done;
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irqhandler->irq = irq;
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irqhandler->func = func;
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sl_lock(&irqhandlers.sl);
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linklist_append(struct irqhandler *, irqhandlers.handlers, irqhandler);
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sl_unlock(&irqhandlers.sl);
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done:
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return;
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}
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void irqhandler_unregister(int irq) {
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struct irqhandler *irqhandler = NULL;
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sl_lock(&irqhandlers.sl);
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linklist_find(struct irqhandler *, irqhandlers.handlers, irqhandler, irq, irq);
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if (irqhandler == NULL)
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goto done;
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linklist_remove(struct irqhandler *, irqhandlers.handlers, irqhandler);
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sl_unlock(&irqhandlers.sl);
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free(irqhandler);
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return;
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done:
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sl_unlock(&irqhandlers.sl);
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return;
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}
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irqhandler_func_t irqhandler_find(int irq) {
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struct irqhandler *irqhandler = NULL;
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irqhandler_func_t func = NULL;
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sl_lock(&irqhandlers.sl);
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linklist_find(struct irqhandler *, irqhandlers.handlers, irqhandler, irq, irq);
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if (irqhandler == NULL) {
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goto done;
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}
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func = irqhandler->func;
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done:
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sl_unlock(&irqhandlers.sl);
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return func;
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}
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void irqhandler_enable(int irq) {
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#if defined(__i386__)
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pic_unmask_irq(irq);
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#endif
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}
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void irqhandler_disable(int irq) {
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#if defined(__i386__)
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pic_mask_irq(irq);
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#endif
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}
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