Laurent Vivier | 0791bc0 | 2021-03-12 22:41:44 +0100 | [diff] [blame] | 1 | /* |
Philippe Mathieu-Daudé | 65b4c8c | 2021-11-03 11:53:11 +0100 | [diff] [blame] | 2 | * SPDX-License-Identifier: GPL-2.0-or-later |
Laurent Vivier | 0791bc0 | 2021-03-12 22:41:44 +0100 | [diff] [blame] | 3 | * |
| 4 | * Virt system Controller |
| 5 | */ |
| 6 | |
| 7 | #include "qemu/osdep.h" |
Laurent Vivier | 0791bc0 | 2021-03-12 22:41:44 +0100 | [diff] [blame] | 8 | #include "hw/qdev-properties.h" |
| 9 | #include "hw/sysbus.h" |
| 10 | #include "migration/vmstate.h" |
| 11 | #include "qemu/log.h" |
| 12 | #include "trace.h" |
| 13 | #include "sysemu/runstate.h" |
| 14 | #include "hw/misc/virt_ctrl.h" |
| 15 | |
| 16 | enum { |
| 17 | REG_FEATURES = 0x00, |
| 18 | REG_CMD = 0x04, |
| 19 | }; |
| 20 | |
| 21 | #define FEAT_POWER_CTRL 0x00000001 |
| 22 | |
| 23 | enum { |
| 24 | CMD_NOOP, |
| 25 | CMD_RESET, |
| 26 | CMD_HALT, |
| 27 | CMD_PANIC, |
| 28 | }; |
| 29 | |
| 30 | static uint64_t virt_ctrl_read(void *opaque, hwaddr addr, unsigned size) |
| 31 | { |
| 32 | VirtCtrlState *s = opaque; |
| 33 | uint64_t value = 0; |
| 34 | |
| 35 | switch (addr) { |
| 36 | case REG_FEATURES: |
| 37 | value = FEAT_POWER_CTRL; |
| 38 | break; |
| 39 | default: |
| 40 | qemu_log_mask(LOG_UNIMP, |
| 41 | "%s: unimplemented register read 0x%02"HWADDR_PRIx"\n", |
| 42 | __func__, addr); |
| 43 | break; |
| 44 | } |
| 45 | |
| 46 | trace_virt_ctrl_write(s, addr, size, value); |
| 47 | |
| 48 | return value; |
| 49 | } |
| 50 | |
| 51 | static void virt_ctrl_write(void *opaque, hwaddr addr, uint64_t value, |
| 52 | unsigned size) |
| 53 | { |
| 54 | VirtCtrlState *s = opaque; |
| 55 | |
| 56 | trace_virt_ctrl_write(s, addr, size, value); |
| 57 | |
| 58 | switch (addr) { |
| 59 | case REG_CMD: |
| 60 | switch (value) { |
| 61 | case CMD_NOOP: |
| 62 | break; |
| 63 | case CMD_RESET: |
| 64 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
| 65 | break; |
| 66 | case CMD_HALT: |
| 67 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
| 68 | break; |
| 69 | case CMD_PANIC: |
| 70 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC); |
| 71 | break; |
| 72 | } |
| 73 | break; |
| 74 | default: |
| 75 | qemu_log_mask(LOG_UNIMP, |
| 76 | "%s: unimplemented register write 0x%02"HWADDR_PRIx"\n", |
| 77 | __func__, addr); |
| 78 | break; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | static const MemoryRegionOps virt_ctrl_ops = { |
| 83 | .read = virt_ctrl_read, |
| 84 | .write = virt_ctrl_write, |
| 85 | .endianness = DEVICE_NATIVE_ENDIAN, |
| 86 | .valid.max_access_size = 4, |
| 87 | .impl.max_access_size = 4, |
| 88 | }; |
| 89 | |
| 90 | static void virt_ctrl_reset(DeviceState *dev) |
| 91 | { |
| 92 | VirtCtrlState *s = VIRT_CTRL(dev); |
| 93 | |
| 94 | trace_virt_ctrl_reset(s); |
| 95 | } |
| 96 | |
| 97 | static void virt_ctrl_realize(DeviceState *dev, Error **errp) |
| 98 | { |
| 99 | VirtCtrlState *s = VIRT_CTRL(dev); |
| 100 | |
| 101 | trace_virt_ctrl_instance_init(s); |
| 102 | |
| 103 | memory_region_init_io(&s->iomem, OBJECT(s), &virt_ctrl_ops, s, |
| 104 | "virt-ctrl", 0x100); |
| 105 | } |
| 106 | |
| 107 | static const VMStateDescription vmstate_virt_ctrl = { |
| 108 | .name = "virt-ctrl", |
| 109 | .version_id = 1, |
| 110 | .minimum_version_id = 1, |
Richard Henderson | e4ea952 | 2023-12-21 14:16:21 +1100 | [diff] [blame] | 111 | .fields = (const VMStateField[]) { |
Laurent Vivier | 0791bc0 | 2021-03-12 22:41:44 +0100 | [diff] [blame] | 112 | VMSTATE_UINT32(irq_enabled, VirtCtrlState), |
| 113 | VMSTATE_END_OF_LIST() |
| 114 | } |
| 115 | }; |
| 116 | |
| 117 | static void virt_ctrl_instance_init(Object *obj) |
| 118 | { |
| 119 | SysBusDevice *dev = SYS_BUS_DEVICE(obj); |
| 120 | VirtCtrlState *s = VIRT_CTRL(obj); |
| 121 | |
| 122 | trace_virt_ctrl_instance_init(s); |
| 123 | |
| 124 | sysbus_init_mmio(dev, &s->iomem); |
| 125 | sysbus_init_irq(dev, &s->irq); |
| 126 | } |
| 127 | |
| 128 | static void virt_ctrl_class_init(ObjectClass *oc, void *data) |
| 129 | { |
| 130 | DeviceClass *dc = DEVICE_CLASS(oc); |
| 131 | |
Peter Maydell | e3d0814 | 2024-09-13 15:31:44 +0100 | [diff] [blame] | 132 | device_class_set_legacy_reset(dc, virt_ctrl_reset); |
Laurent Vivier | 0791bc0 | 2021-03-12 22:41:44 +0100 | [diff] [blame] | 133 | dc->realize = virt_ctrl_realize; |
| 134 | dc->vmsd = &vmstate_virt_ctrl; |
| 135 | } |
| 136 | |
| 137 | static const TypeInfo virt_ctrl_info = { |
| 138 | .name = TYPE_VIRT_CTRL, |
| 139 | .parent = TYPE_SYS_BUS_DEVICE, |
| 140 | .class_init = virt_ctrl_class_init, |
| 141 | .instance_init = virt_ctrl_instance_init, |
| 142 | .instance_size = sizeof(VirtCtrlState), |
| 143 | }; |
| 144 | |
| 145 | static void virt_ctrl_register_types(void) |
| 146 | { |
| 147 | type_register_static(&virt_ctrl_info); |
| 148 | } |
| 149 | |
| 150 | type_init(virt_ctrl_register_types) |