These changes are the raw update to qemu-2.6.
[kvmfornfv.git] / qemu / hw / sh4 / sh_pci.c
1 /*
2  * SuperH on-chip PCIC emulation.
3  *
4  * Copyright (c) 2008 Takashi YOSHII
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 #include "qemu/osdep.h"
25 #include "hw/sysbus.h"
26 #include "hw/sh4/sh.h"
27 #include "hw/pci/pci.h"
28 #include "hw/pci/pci_host.h"
29 #include "qemu/bswap.h"
30 #include "exec/address-spaces.h"
31
32 #define TYPE_SH_PCI_HOST_BRIDGE "sh_pci"
33
34 #define SH_PCI_HOST_BRIDGE(obj) \
35     OBJECT_CHECK(SHPCIState, (obj), TYPE_SH_PCI_HOST_BRIDGE)
36
37 typedef struct SHPCIState {
38     PCIHostState parent_obj;
39
40     PCIDevice *dev;
41     qemu_irq irq[4];
42     MemoryRegion memconfig_p4;
43     MemoryRegion memconfig_a7;
44     MemoryRegion isa;
45     uint32_t par;
46     uint32_t mbr;
47     uint32_t iobr;
48 } SHPCIState;
49
50 static void sh_pci_reg_write (void *p, hwaddr addr, uint64_t val,
51                               unsigned size)
52 {
53     SHPCIState *pcic = p;
54     PCIHostState *phb = PCI_HOST_BRIDGE(pcic);
55
56     switch(addr) {
57     case 0 ... 0xfc:
58         cpu_to_le32w((uint32_t*)(pcic->dev->config + addr), val);
59         break;
60     case 0x1c0:
61         pcic->par = val;
62         break;
63     case 0x1c4:
64         pcic->mbr = val & 0xff000001;
65         break;
66     case 0x1c8:
67         if ((val & 0xfffc0000) != (pcic->iobr & 0xfffc0000)) {
68             memory_region_del_subregion(get_system_memory(), &pcic->isa);
69             pcic->iobr = val & 0xfffc0001;
70             memory_region_add_subregion(get_system_memory(),
71                                         pcic->iobr & 0xfffc0000, &pcic->isa);
72         }
73         break;
74     case 0x220:
75         pci_data_write(phb->bus, pcic->par, val, 4);
76         break;
77     }
78 }
79
80 static uint64_t sh_pci_reg_read (void *p, hwaddr addr,
81                                  unsigned size)
82 {
83     SHPCIState *pcic = p;
84     PCIHostState *phb = PCI_HOST_BRIDGE(pcic);
85
86     switch(addr) {
87     case 0 ... 0xfc:
88         return le32_to_cpup((uint32_t*)(pcic->dev->config + addr));
89     case 0x1c0:
90         return pcic->par;
91     case 0x1c4:
92         return pcic->mbr;
93     case 0x1c8:
94         return pcic->iobr;
95     case 0x220:
96         return pci_data_read(phb->bus, pcic->par, 4);
97     }
98     return 0;
99 }
100
101 static const MemoryRegionOps sh_pci_reg_ops = {
102     .read = sh_pci_reg_read,
103     .write = sh_pci_reg_write,
104     .endianness = DEVICE_NATIVE_ENDIAN,
105     .valid = {
106         .min_access_size = 4,
107         .max_access_size = 4,
108     },
109 };
110
111 static int sh_pci_map_irq(PCIDevice *d, int irq_num)
112 {
113     return (d->devfn >> 3);
114 }
115
116 static void sh_pci_set_irq(void *opaque, int irq_num, int level)
117 {
118     qemu_irq *pic = opaque;
119
120     qemu_set_irq(pic[irq_num], level);
121 }
122
123 static int sh_pci_device_init(SysBusDevice *dev)
124 {
125     PCIHostState *phb;
126     SHPCIState *s;
127     int i;
128
129     s = SH_PCI_HOST_BRIDGE(dev);
130     phb = PCI_HOST_BRIDGE(s);
131     for (i = 0; i < 4; i++) {
132         sysbus_init_irq(dev, &s->irq[i]);
133     }
134     phb->bus = pci_register_bus(DEVICE(dev), "pci",
135                                 sh_pci_set_irq, sh_pci_map_irq,
136                                 s->irq,
137                                 get_system_memory(),
138                                 get_system_io(),
139                                 PCI_DEVFN(0, 0), 4, TYPE_PCI_BUS);
140     memory_region_init_io(&s->memconfig_p4, OBJECT(s), &sh_pci_reg_ops, s,
141                           "sh_pci", 0x224);
142     memory_region_init_alias(&s->memconfig_a7, OBJECT(s), "sh_pci.2",
143                              &s->memconfig_p4, 0, 0x224);
144     memory_region_init_alias(&s->isa, OBJECT(s), "sh_pci.isa",
145                              get_system_io(), 0, 0x40000);
146     sysbus_init_mmio(dev, &s->memconfig_p4);
147     sysbus_init_mmio(dev, &s->memconfig_a7);
148     s->iobr = 0xfe240000;
149     memory_region_add_subregion(get_system_memory(), s->iobr, &s->isa);
150
151     s->dev = pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "sh_pci_host");
152     return 0;
153 }
154
155 static void sh_pci_host_realize(PCIDevice *d, Error **errp)
156 {
157     pci_set_word(d->config + PCI_COMMAND, PCI_COMMAND_WAIT);
158     pci_set_word(d->config + PCI_STATUS, PCI_STATUS_CAP_LIST |
159                  PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
160 }
161
162 static void sh_pci_host_class_init(ObjectClass *klass, void *data)
163 {
164     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
165     DeviceClass *dc = DEVICE_CLASS(klass);
166
167     k->realize = sh_pci_host_realize;
168     k->vendor_id = PCI_VENDOR_ID_HITACHI;
169     k->device_id = PCI_DEVICE_ID_HITACHI_SH7751R;
170     /*
171      * PCI-facing part of the host bridge, not usable without the
172      * host-facing part, which can't be device_add'ed, yet.
173      */
174     dc->cannot_instantiate_with_device_add_yet = true;
175 }
176
177 static const TypeInfo sh_pci_host_info = {
178     .name          = "sh_pci_host",
179     .parent        = TYPE_PCI_DEVICE,
180     .instance_size = sizeof(PCIDevice),
181     .class_init    = sh_pci_host_class_init,
182 };
183
184 static void sh_pci_device_class_init(ObjectClass *klass, void *data)
185 {
186     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
187
188     sdc->init = sh_pci_device_init;
189 }
190
191 static const TypeInfo sh_pci_device_info = {
192     .name          = TYPE_SH_PCI_HOST_BRIDGE,
193     .parent        = TYPE_PCI_HOST_BRIDGE,
194     .instance_size = sizeof(SHPCIState),
195     .class_init    = sh_pci_device_class_init,
196 };
197
198 static void sh_pci_register_types(void)
199 {
200     type_register_static(&sh_pci_device_info);
201     type_register_static(&sh_pci_host_info);
202 }
203
204 type_init(sh_pci_register_types)