main: switch qemu_set_fd_handler to g_io_add_watch
[qemu.git] / hw / sysbus.c
blobc365d39d24804186d397cbc78496e04fa4957da2
1 /*
2 * System (CPU) Bus device support code
4 * Copyright (c) 2009 CodeSourcery
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "sysbus.h"
21 #include "monitor.h"
22 #include "exec-memory.h"
24 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
25 static char *sysbus_get_fw_dev_path(DeviceState *dev);
27 struct BusInfo system_bus_info = {
28 .name = "System",
29 .size = sizeof(BusState),
30 .print_dev = sysbus_dev_print,
31 .get_fw_dev_path = sysbus_get_fw_dev_path,
34 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
36 assert(n >= 0 && n < dev->num_irq);
37 dev->irqs[n] = NULL;
38 if (dev->irqp[n]) {
39 *dev->irqp[n] = irq;
43 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
45 assert(n >= 0 && n < dev->num_mmio);
47 if (dev->mmio[n].addr == addr) {
48 /* ??? region already mapped here. */
49 return;
51 if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
52 /* Unregister previous mapping. */
53 if (dev->mmio[n].memory) {
54 memory_region_del_subregion(get_system_memory(),
55 dev->mmio[n].memory);
56 } else if (dev->mmio[n].unmap) {
57 dev->mmio[n].unmap(dev, dev->mmio[n].addr);
58 } else {
59 cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
60 IO_MEM_UNASSIGNED);
63 dev->mmio[n].addr = addr;
64 if (dev->mmio[n].memory) {
65 memory_region_add_subregion(get_system_memory(),
66 addr,
67 dev->mmio[n].memory);
68 } else if (dev->mmio[n].cb) {
69 dev->mmio[n].cb(dev, addr);
70 } else {
71 cpu_register_physical_memory(addr, dev->mmio[n].size,
72 dev->mmio[n].iofunc);
77 /* Request an IRQ source. The actual IRQ object may be populated later. */
78 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
80 int n;
82 assert(dev->num_irq < QDEV_MAX_IRQ);
83 n = dev->num_irq++;
84 dev->irqp[n] = p;
87 /* Pass IRQs from a target device. */
88 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
90 int i;
91 assert(dev->num_irq == 0);
92 dev->num_irq = target->num_irq;
93 for (i = 0; i < dev->num_irq; i++) {
94 dev->irqp[i] = target->irqp[i];
98 void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size,
99 ram_addr_t iofunc)
101 int n;
103 assert(dev->num_mmio < QDEV_MAX_MMIO);
104 n = dev->num_mmio++;
105 dev->mmio[n].addr = -1;
106 dev->mmio[n].size = size;
107 dev->mmio[n].iofunc = iofunc;
110 void sysbus_init_mmio_cb2(SysBusDevice *dev,
111 mmio_mapfunc cb, mmio_mapfunc unmap)
113 int n;
115 assert(dev->num_mmio < QDEV_MAX_MMIO);
116 n = dev->num_mmio++;
117 dev->mmio[n].addr = -1;
118 dev->mmio[n].size = 0;
119 dev->mmio[n].cb = cb;
120 dev->mmio[n].unmap = unmap;
123 void sysbus_init_mmio_region(SysBusDevice *dev, MemoryRegion *memory)
125 int n;
127 assert(dev->num_mmio < QDEV_MAX_MMIO);
128 n = dev->num_mmio++;
129 dev->mmio[n].addr = -1;
130 dev->mmio[n].size = memory_region_size(memory);
131 dev->mmio[n].memory = memory;
134 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
136 return dev->mmio[n].memory;
139 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
141 pio_addr_t i;
143 for (i = 0; i < size; i++) {
144 assert(dev->num_pio < QDEV_MAX_PIO);
145 dev->pio[dev->num_pio++] = ioport++;
149 static int sysbus_device_init(DeviceState *dev, DeviceInfo *base)
151 SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
153 return info->init(sysbus_from_qdev(dev));
156 void sysbus_register_withprop(SysBusDeviceInfo *info)
158 info->qdev.init = sysbus_device_init;
159 info->qdev.bus_info = &system_bus_info;
161 assert(info->qdev.size >= sizeof(SysBusDevice));
162 qdev_register(&info->qdev);
165 void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
167 SysBusDeviceInfo *info;
169 info = g_malloc0(sizeof(*info));
170 info->qdev.name = g_strdup(name);
171 info->qdev.size = size;
172 info->init = init;
173 sysbus_register_withprop(info);
176 DeviceState *sysbus_create_varargs(const char *name,
177 target_phys_addr_t addr, ...)
179 DeviceState *dev;
180 SysBusDevice *s;
181 va_list va;
182 qemu_irq irq;
183 int n;
185 dev = qdev_create(NULL, name);
186 s = sysbus_from_qdev(dev);
187 qdev_init_nofail(dev);
188 if (addr != (target_phys_addr_t)-1) {
189 sysbus_mmio_map(s, 0, addr);
191 va_start(va, addr);
192 n = 0;
193 while (1) {
194 irq = va_arg(va, qemu_irq);
195 if (!irq) {
196 break;
198 sysbus_connect_irq(s, n, irq);
199 n++;
201 return dev;
204 DeviceState *sysbus_try_create_varargs(const char *name,
205 target_phys_addr_t addr, ...)
207 DeviceState *dev;
208 SysBusDevice *s;
209 va_list va;
210 qemu_irq irq;
211 int n;
213 dev = qdev_try_create(NULL, name);
214 if (!dev) {
215 return NULL;
217 s = sysbus_from_qdev(dev);
218 qdev_init_nofail(dev);
219 if (addr != (target_phys_addr_t)-1) {
220 sysbus_mmio_map(s, 0, addr);
222 va_start(va, addr);
223 n = 0;
224 while (1) {
225 irq = va_arg(va, qemu_irq);
226 if (!irq) {
227 break;
229 sysbus_connect_irq(s, n, irq);
230 n++;
232 return dev;
235 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
237 SysBusDevice *s = sysbus_from_qdev(dev);
238 int i;
240 monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
241 for (i = 0; i < s->num_mmio; i++) {
242 monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
243 indent, "", s->mmio[i].addr, s->mmio[i].size);
247 static char *sysbus_get_fw_dev_path(DeviceState *dev)
249 SysBusDevice *s = sysbus_from_qdev(dev);
250 char path[40];
251 int off;
253 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
255 if (s->num_mmio) {
256 snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
257 s->mmio[0].addr);
258 } else if (s->num_pio) {
259 snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
262 return strdup(path);