1 /* 2 * QEMU IRQ/GPIO common code. 3 * 4 * Copyright (c) 2007 CodeSourcery. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qemu/osdep.h" 25 #include "qemu/main-loop.h" 26 #include "hw/irq.h" 27 #include "qom/object.h" 28 29 void qemu_set_irq(qemu_irq irq, int level) 30 { 31 if (!irq) 32 return; 33 34 irq->handler(irq->opaque, irq->n, level); 35 } 36 37 static void init_irq_fields(IRQState *irq, qemu_irq_handler handler, 38 void *opaque, int n) 39 { 40 irq->handler = handler; 41 irq->opaque = opaque; 42 irq->n = n; 43 } 44 45 void qemu_init_irq(IRQState *irq, qemu_irq_handler handler, void *opaque, 46 int n) 47 { 48 object_initialize(irq, sizeof(*irq), TYPE_IRQ); 49 init_irq_fields(irq, handler, opaque, n); 50 } 51 52 void qemu_init_irqs(IRQState irq[], size_t count, 53 qemu_irq_handler handler, void *opaque) 54 { 55 for (size_t i = 0; i < count; i++) { 56 qemu_init_irq(&irq[i], handler, opaque, i); 57 } 58 } 59 60 qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler, 61 void *opaque, int n) 62 { 63 qemu_irq *s; 64 int i; 65 66 if (!old) { 67 n_old = 0; 68 } 69 s = old ? g_renew(qemu_irq, old, n + n_old) : g_new(qemu_irq, n); 70 for (i = n_old; i < n + n_old; i++) { 71 s[i] = qemu_allocate_irq(handler, opaque, i); 72 } 73 return s; 74 } 75 76 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n) 77 { 78 return qemu_extend_irqs(NULL, 0, handler, opaque, n); 79 } 80 81 qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n) 82 { 83 IRQState *irq = IRQ(object_new(TYPE_IRQ)); 84 init_irq_fields(irq, handler, opaque, n); 85 return irq; 86 } 87 88 void qemu_free_irqs(qemu_irq *s, int n) 89 { 90 int i; 91 for (i = 0; i < n; i++) { 92 qemu_free_irq(s[i]); 93 } 94 g_free(s); 95 } 96 97 void qemu_free_irq(qemu_irq irq) 98 { 99 object_unref(OBJECT(irq)); 100 } 101 102 static void qemu_notirq(void *opaque, int line, int level) 103 { 104 IRQState *irq = opaque; 105 106 irq->handler(irq->opaque, irq->n, !level); 107 } 108 109 qemu_irq qemu_irq_invert(qemu_irq irq) 110 { 111 /* The default state for IRQs is low, so raise the output now. */ 112 qemu_irq_raise(irq); 113 return qemu_allocate_irq(qemu_notirq, irq, 0); 114 } 115 116 void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n) 117 { 118 int i; 119 qemu_irq *old_irqs = qemu_allocate_irqs(NULL, NULL, n); 120 for (i = 0; i < n; i++) { 121 *old_irqs[i] = *gpio_in[i]; 122 gpio_in[i]->handler = handler; 123 gpio_in[i]->opaque = &old_irqs[i]; 124 } 125 } 126 127 static const TypeInfo irq_type_info = { 128 .name = TYPE_IRQ, 129 .parent = TYPE_OBJECT, 130 .instance_size = sizeof(IRQState), 131 }; 132 133 static void irq_register_types(void) 134 { 135 type_register_static(&irq_type_info); 136 } 137 138 type_init(irq_register_types) 139