1 /* 2 * QEMU Macintosh Nubus Virtio MMIO card 3 * 4 * Copyright (c) 2024 Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qapi/error.h" 11 #include "hw/nubus/nubus-virtio-mmio.h" 12 13 14 #define NUBUS_VIRTIO_MMIO_PIC_OFFSET 0 15 #define NUBUS_VIRTIO_MMIO_DEV_OFFSET 0x200 16 17 18 static void nubus_virtio_mmio_set_input_irq(void *opaque, int n, int level) 19 { 20 NubusDevice *nd = NUBUS_DEVICE(opaque); 21 22 nubus_set_irq(nd, level); 23 } 24 25 static void nubus_virtio_mmio_realize(DeviceState *dev, Error **errp) 26 { 27 ERRP_GUARD(); 28 NubusVirtioMMIODeviceClass *nvmdc = NUBUS_VIRTIO_MMIO_GET_CLASS(dev); 29 NubusVirtioMMIO *s = NUBUS_VIRTIO_MMIO(dev); 30 NubusDevice *nd = NUBUS_DEVICE(dev); 31 SysBusDevice *sbd; 32 int i, offset; 33 34 nvmdc->parent_realize(dev, errp); 35 if (*errp) { 36 return; 37 } 38 39 /* Goldfish PIC */ 40 sbd = SYS_BUS_DEVICE(&s->pic); 41 if (!sysbus_realize(sbd, errp)) { 42 return; 43 } 44 memory_region_add_subregion(&nd->slot_mem, NUBUS_VIRTIO_MMIO_PIC_OFFSET, 45 sysbus_mmio_get_region(sbd, 0)); 46 sysbus_connect_irq(sbd, 0, 47 qdev_get_gpio_in_named(dev, "pic-input-irq", 0)); 48 49 /* virtio-mmio devices */ 50 offset = NUBUS_VIRTIO_MMIO_DEV_OFFSET; 51 for (i = 0; i < NUBUS_VIRTIO_MMIO_NUM_DEVICES; i++) { 52 sbd = SYS_BUS_DEVICE(&s->virtio_mmio[i]); 53 qdev_prop_set_bit(DEVICE(sbd), "force-legacy", false); 54 if (!sysbus_realize_and_unref(sbd, errp)) { 55 return; 56 } 57 58 memory_region_add_subregion(&nd->slot_mem, offset, 59 sysbus_mmio_get_region(sbd, 0)); 60 offset += 0x200; 61 62 sysbus_connect_irq(sbd, 0, qdev_get_gpio_in(DEVICE(&s->pic), i)); 63 } 64 } 65 66 static void nubus_virtio_mmio_init(Object *obj) 67 { 68 NubusVirtioMMIO *s = NUBUS_VIRTIO_MMIO(obj); 69 int i; 70 71 object_initialize_child(obj, "pic", &s->pic, TYPE_GOLDFISH_PIC); 72 for (i = 0; i < NUBUS_VIRTIO_MMIO_NUM_DEVICES; i++) { 73 char *name = g_strdup_printf("virtio-mmio[%d]", i); 74 object_initialize_child(obj, name, &s->virtio_mmio[i], 75 TYPE_VIRTIO_MMIO); 76 g_free(name); 77 } 78 79 /* Input from goldfish PIC */ 80 qdev_init_gpio_in_named(DEVICE(obj), nubus_virtio_mmio_set_input_irq, 81 "pic-input-irq", 1); 82 } 83 84 static void nubus_virtio_mmio_class_init(ObjectClass *oc, void *data) 85 { 86 DeviceClass *dc = DEVICE_CLASS(oc); 87 NubusVirtioMMIODeviceClass *nvmdc = NUBUS_VIRTIO_MMIO_CLASS(oc); 88 89 device_class_set_parent_realize(dc, nubus_virtio_mmio_realize, 90 &nvmdc->parent_realize); 91 } 92 93 static const TypeInfo nubus_virtio_mmio_types[] = { 94 { 95 .name = TYPE_NUBUS_VIRTIO_MMIO, 96 .parent = TYPE_NUBUS_DEVICE, 97 .instance_init = nubus_virtio_mmio_init, 98 .instance_size = sizeof(NubusVirtioMMIO), 99 .class_init = nubus_virtio_mmio_class_init, 100 .class_size = sizeof(NubusVirtioMMIODeviceClass), 101 }, 102 }; 103 104 DEFINE_TYPES(nubus_virtio_mmio_types) 105