0ebfc997d2
Signed-off-by: Zongyuan Li <zongyuan.li@smartx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20220324181557.203805-5-zongyuan.li@smartx.com Resolves: https://gitlab.com/qemu-project/qemu/-/issues/811 Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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* QEMU IRQ/GPIO common code.
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*
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* Copyright (c) 2007 CodeSourcery.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "hw/irq.h"
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#include "qom/object.h"
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DECLARE_INSTANCE_CHECKER(struct IRQState, IRQ,
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TYPE_IRQ)
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struct IRQState {
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Object parent_obj;
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qemu_irq_handler handler;
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void *opaque;
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int n;
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};
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void qemu_set_irq(qemu_irq irq, int level)
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{
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if (!irq)
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return;
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irq->handler(irq->opaque, irq->n, level);
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}
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qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
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void *opaque, int n)
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{
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qemu_irq *s;
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int i;
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if (!old) {
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n_old = 0;
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}
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s = old ? g_renew(qemu_irq, old, n + n_old) : g_new(qemu_irq, n);
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for (i = n_old; i < n + n_old; i++) {
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s[i] = qemu_allocate_irq(handler, opaque, i);
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}
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return s;
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}
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qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
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{
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return qemu_extend_irqs(NULL, 0, handler, opaque, n);
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}
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qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n)
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{
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struct IRQState *irq;
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irq = IRQ(object_new(TYPE_IRQ));
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irq->handler = handler;
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irq->opaque = opaque;
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irq->n = n;
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return irq;
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}
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void qemu_free_irqs(qemu_irq *s, int n)
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{
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int i;
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for (i = 0; i < n; i++) {
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qemu_free_irq(s[i]);
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}
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g_free(s);
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}
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void qemu_free_irq(qemu_irq irq)
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{
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object_unref(OBJECT(irq));
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}
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static void qemu_notirq(void *opaque, int line, int level)
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{
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struct IRQState *irq = opaque;
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irq->handler(irq->opaque, irq->n, !level);
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}
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qemu_irq qemu_irq_invert(qemu_irq irq)
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{
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/* The default state for IRQs is low, so raise the output now. */
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qemu_irq_raise(irq);
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return qemu_allocate_irq(qemu_notirq, irq, 0);
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}
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void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n)
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{
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int i;
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qemu_irq *old_irqs = qemu_allocate_irqs(NULL, NULL, n);
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for (i = 0; i < n; i++) {
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*old_irqs[i] = *gpio_in[i];
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gpio_in[i]->handler = handler;
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gpio_in[i]->opaque = &old_irqs[i];
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}
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}
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static const TypeInfo irq_type_info = {
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.name = TYPE_IRQ,
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.parent = TYPE_OBJECT,
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.instance_size = sizeof(struct IRQState),
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};
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static void irq_register_types(void)
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{
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type_register_static(&irq_type_info);
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}
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type_init(irq_register_types)
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