| 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, const 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) |