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1 | /* | |
2 | * System (CPU) Bus device support code | |
3 | * | |
4 | * Copyright (c) 2009 CodeSourcery | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include "sysbus.h" | |
21 | #include "monitor.h" | |
22 | ||
23 | static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent); | |
24 | static char *sysbus_get_fw_dev_path(DeviceState *dev); | |
25 | ||
26 | struct BusInfo system_bus_info = { | |
27 | .name = "System", | |
28 | .size = sizeof(BusState), | |
29 | .print_dev = sysbus_dev_print, | |
30 | .get_fw_dev_path = sysbus_get_fw_dev_path, | |
31 | }; | |
32 | ||
33 | void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq) | |
34 | { | |
35 | assert(n >= 0 && n < dev->num_irq); | |
36 | dev->irqs[n] = NULL; | |
37 | if (dev->irqp[n]) { | |
38 | *dev->irqp[n] = irq; | |
39 | } | |
40 | } | |
41 | ||
42 | void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr) | |
43 | { | |
44 | assert(n >= 0 && n < dev->num_mmio); | |
45 | ||
46 | if (dev->mmio[n].addr == addr) { | |
47 | /* ??? region already mapped here. */ | |
48 | return; | |
49 | } | |
50 | if (dev->mmio[n].addr != (target_phys_addr_t)-1) { | |
51 | /* Unregister previous mapping. */ | |
52 | cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size, | |
53 | IO_MEM_UNASSIGNED); | |
54 | } | |
55 | dev->mmio[n].addr = addr; | |
56 | if (dev->mmio[n].cb) { | |
57 | dev->mmio[n].cb(dev, addr); | |
58 | } else { | |
59 | cpu_register_physical_memory(addr, dev->mmio[n].size, | |
60 | dev->mmio[n].iofunc); | |
61 | } | |
62 | } | |
63 | ||
64 | ||
65 | /* Request an IRQ source. The actual IRQ object may be populated later. */ | |
66 | void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p) | |
67 | { | |
68 | int n; | |
69 | ||
70 | assert(dev->num_irq < QDEV_MAX_IRQ); | |
71 | n = dev->num_irq++; | |
72 | dev->irqp[n] = p; | |
73 | } | |
74 | ||
75 | /* Pass IRQs from a target device. */ | |
76 | void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target) | |
77 | { | |
78 | int i; | |
79 | assert(dev->num_irq == 0); | |
80 | dev->num_irq = target->num_irq; | |
81 | for (i = 0; i < dev->num_irq; i++) { | |
82 | dev->irqp[i] = target->irqp[i]; | |
83 | } | |
84 | } | |
85 | ||
86 | void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size, | |
87 | ram_addr_t iofunc) | |
88 | { | |
89 | int n; | |
90 | ||
91 | assert(dev->num_mmio < QDEV_MAX_MMIO); | |
92 | n = dev->num_mmio++; | |
93 | dev->mmio[n].addr = -1; | |
94 | dev->mmio[n].size = size; | |
95 | dev->mmio[n].iofunc = iofunc; | |
96 | } | |
97 | ||
98 | void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size, | |
99 | mmio_mapfunc cb) | |
100 | { | |
101 | int n; | |
102 | ||
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].cb = cb; | |
108 | } | |
109 | ||
110 | void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size) | |
111 | { | |
112 | pio_addr_t i; | |
113 | ||
114 | for (i = 0; i < size; i++) { | |
115 | assert(dev->num_pio < QDEV_MAX_PIO); | |
116 | dev->pio[dev->num_pio++] = ioport++; | |
117 | } | |
118 | } | |
119 | ||
120 | static int sysbus_device_init(DeviceState *dev, DeviceInfo *base) | |
121 | { | |
122 | SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev); | |
123 | ||
124 | return info->init(sysbus_from_qdev(dev)); | |
125 | } | |
126 | ||
127 | void sysbus_register_withprop(SysBusDeviceInfo *info) | |
128 | { | |
129 | info->qdev.init = sysbus_device_init; | |
130 | info->qdev.bus_info = &system_bus_info; | |
131 | ||
132 | assert(info->qdev.size >= sizeof(SysBusDevice)); | |
133 | qdev_register(&info->qdev); | |
134 | } | |
135 | ||
136 | void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init) | |
137 | { | |
138 | SysBusDeviceInfo *info; | |
139 | ||
140 | info = qemu_mallocz(sizeof(*info)); | |
141 | info->qdev.name = qemu_strdup(name); | |
142 | info->qdev.size = size; | |
143 | info->init = init; | |
144 | sysbus_register_withprop(info); | |
145 | } | |
146 | ||
147 | DeviceState *sysbus_create_varargs(const char *name, | |
148 | target_phys_addr_t addr, ...) | |
149 | { | |
150 | DeviceState *dev; | |
151 | SysBusDevice *s; | |
152 | va_list va; | |
153 | qemu_irq irq; | |
154 | int n; | |
155 | ||
156 | dev = qdev_create(NULL, name); | |
157 | s = sysbus_from_qdev(dev); | |
158 | qdev_init_nofail(dev); | |
159 | if (addr != (target_phys_addr_t)-1) { | |
160 | sysbus_mmio_map(s, 0, addr); | |
161 | } | |
162 | va_start(va, addr); | |
163 | n = 0; | |
164 | while (1) { | |
165 | irq = va_arg(va, qemu_irq); | |
166 | if (!irq) { | |
167 | break; | |
168 | } | |
169 | sysbus_connect_irq(s, n, irq); | |
170 | n++; | |
171 | } | |
172 | return dev; | |
173 | } | |
174 | ||
175 | DeviceState *sysbus_try_create_varargs(const char *name, | |
176 | target_phys_addr_t addr, ...) | |
177 | { | |
178 | DeviceState *dev; | |
179 | SysBusDevice *s; | |
180 | va_list va; | |
181 | qemu_irq irq; | |
182 | int n; | |
183 | ||
184 | dev = qdev_try_create(NULL, name); | |
185 | if (!dev) { | |
186 | return NULL; | |
187 | } | |
188 | s = sysbus_from_qdev(dev); | |
189 | qdev_init_nofail(dev); | |
190 | if (addr != (target_phys_addr_t)-1) { | |
191 | sysbus_mmio_map(s, 0, addr); | |
192 | } | |
193 | va_start(va, addr); | |
194 | n = 0; | |
195 | while (1) { | |
196 | irq = va_arg(va, qemu_irq); | |
197 | if (!irq) { | |
198 | break; | |
199 | } | |
200 | sysbus_connect_irq(s, n, irq); | |
201 | n++; | |
202 | } | |
203 | return dev; | |
204 | } | |
205 | ||
206 | static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent) | |
207 | { | |
208 | SysBusDevice *s = sysbus_from_qdev(dev); | |
209 | int i; | |
210 | ||
211 | monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq); | |
212 | for (i = 0; i < s->num_mmio; i++) { | |
213 | monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n", | |
214 | indent, "", s->mmio[i].addr, s->mmio[i].size); | |
215 | } | |
216 | } | |
217 | ||
218 | static char *sysbus_get_fw_dev_path(DeviceState *dev) | |
219 | { | |
220 | SysBusDevice *s = sysbus_from_qdev(dev); | |
221 | char path[40]; | |
222 | int off; | |
223 | ||
224 | off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); | |
225 | ||
226 | if (s->num_mmio) { | |
227 | snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx, | |
228 | s->mmio[0].addr); | |
229 | } else if (s->num_pio) { | |
230 | snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]); | |
231 | } | |
232 | ||
233 | return strdup(path); | |
234 | } |