/* * QEMU IRQ/GPIO common code. * * Copyright (c) 2007 CodeSourcery. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu-common.h" #include "hw/irq.h" struct IRQState { qemu_irq_handler handler; void *opaque; int n; }; void qemu_set_irq(qemu_irq irq, int level) { if (!irq) return; irq->handler(irq->opaque, irq->n, level); } qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n) { qemu_irq *s; struct IRQState *p; int i; s = (qemu_irq *)g_malloc0(sizeof(qemu_irq) * n); p = (struct IRQState *)g_malloc0(sizeof(struct IRQState) * n); for (i = 0; i < n; i++) { p->handler = handler; p->opaque = opaque; p->n = i; s[i] = p; p++; } return s; } void qemu_free_irqs(qemu_irq *s) { g_free(s[0]); g_free(s); } static void qemu_notirq(void *opaque, int line, int level) { struct IRQState *irq = opaque; irq->handler(irq->opaque, irq->n, !level); } qemu_irq qemu_irq_invert(qemu_irq irq) { /* The default state for IRQs is low, so raise the output now. */ qemu_irq_raise(irq); return qemu_allocate_irqs(qemu_notirq, irq, 1)[0]; }