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, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
19 */
20
21 #include "sysbus.h"
22 #include "sysemu.h"
23 #include "monitor.h"
24
sysbus_connect_irq(SysBusDevice * dev,int n,qemu_irq irq)25 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
26 {
27 assert(n >= 0 && n < dev->num_irq);
28 dev->irqs[n] = 0;
29 if (dev->irqp[n]) {
30 *dev->irqp[n] = irq;
31 }
32 }
33
sysbus_mmio_map(SysBusDevice * dev,int n,target_phys_addr_t addr)34 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
35 {
36 assert(n >= 0 && n < dev->num_mmio);
37
38 if (dev->mmio[n].addr == addr) {
39 /* ??? region already mapped here. */
40 return;
41 }
42 if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
43 /* Unregister previous mapping. */
44 cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
45 IO_MEM_UNASSIGNED);
46 }
47 dev->mmio[n].addr = addr;
48 if (dev->mmio[n].cb) {
49 dev->mmio[n].cb(dev, addr);
50 } else {
51 cpu_register_physical_memory(addr, dev->mmio[n].size,
52 dev->mmio[n].iofunc);
53 }
54 }
55
56
57 /* Request an IRQ source. The actual IRQ object may be populated later. */
sysbus_init_irq(SysBusDevice * dev,qemu_irq * p)58 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
59 {
60 int n;
61
62 assert(dev->num_irq < QDEV_MAX_IRQ);
63 n = dev->num_irq++;
64 dev->irqp[n] = p;
65 }
66
67 /* Pass IRQs from a target device. */
sysbus_pass_irq(SysBusDevice * dev,SysBusDevice * target)68 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
69 {
70 int i;
71 assert(dev->num_irq == 0);
72 dev->num_irq = target->num_irq;
73 for (i = 0; i < dev->num_irq; i++) {
74 dev->irqp[i] = target->irqp[i];
75 }
76 }
77
sysbus_init_mmio(SysBusDevice * dev,target_phys_addr_t size,int iofunc)78 void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size, int iofunc)
79 {
80 int n;
81
82 assert(dev->num_mmio < QDEV_MAX_MMIO);
83 n = dev->num_mmio++;
84 dev->mmio[n].addr = -1;
85 dev->mmio[n].size = size;
86 dev->mmio[n].iofunc = iofunc;
87 }
88
sysbus_init_mmio_cb(SysBusDevice * dev,target_phys_addr_t size,mmio_mapfunc cb)89 void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
90 mmio_mapfunc cb)
91 {
92 int n;
93
94 assert(dev->num_mmio < QDEV_MAX_MMIO);
95 n = dev->num_mmio++;
96 dev->mmio[n].addr = -1;
97 dev->mmio[n].size = size;
98 dev->mmio[n].cb = cb;
99 }
100
sysbus_device_init(DeviceState * dev,DeviceInfo * base)101 static void sysbus_device_init(DeviceState *dev, DeviceInfo *base)
102 {
103 SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
104
105 info->init(sysbus_from_qdev(dev));
106 }
107
sysbus_register_withprop(SysBusDeviceInfo * info)108 void sysbus_register_withprop(SysBusDeviceInfo *info)
109 {
110 info->qdev.init = sysbus_device_init;
111 info->qdev.bus_type = BUS_TYPE_SYSTEM;
112
113 assert(info->qdev.size >= sizeof(SysBusDevice));
114 qdev_register(&info->qdev);
115 }
116
sysbus_register_dev(const char * name,size_t size,sysbus_initfn init)117 void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
118 {
119 SysBusDeviceInfo *info;
120
121 info = qemu_mallocz(sizeof(*info));
122 info->qdev.name = qemu_strdup(name);
123 info->qdev.size = size;
124 info->init = init;
125 sysbus_register_withprop(info);
126 }
127
sysbus_create_varargs(const char * name,target_phys_addr_t addr,...)128 DeviceState *sysbus_create_varargs(const char *name,
129 target_phys_addr_t addr, ...)
130 {
131 DeviceState *dev;
132 SysBusDevice *s;
133 va_list va;
134 qemu_irq irq;
135 int n;
136
137 dev = qdev_create(NULL, name);
138 s = sysbus_from_qdev(dev);
139 qdev_init(dev);
140 if (addr != (target_phys_addr_t)-1) {
141 sysbus_mmio_map(s, 0, addr);
142 }
143 va_start(va, addr);
144 n = 0;
145 while (1) {
146 irq = va_arg(va, qemu_irq);
147 if (!irq) {
148 break;
149 }
150 sysbus_connect_irq(s, n, irq);
151 n++;
152 }
153 return dev;
154 }
155
sysbus_dev_print(Monitor * mon,DeviceState * dev,int indent)156 void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
157 {
158 SysBusDevice *s = sysbus_from_qdev(dev);
159 int i;
160
161 for (i = 0; i < s->num_mmio; i++) {
162 monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
163 indent, "", s->mmio[i].addr, s->mmio[i].size);
164 }
165 }
166