1 /*
2 * QEMU Simba PCI bridge
3 *
4 * Copyright (c) 2006 Fabrice Bellard
5 * Copyright (c) 2012,2013 Artyom Tarasenko
6 * Copyright (c) 2018 Mark Cave-Ayland
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27 #include "qemu/osdep.h"
28 #include "hw/pci/pci.h"
29 #include "hw/pci/pci_bridge.h"
30 #include "hw/pci/pci_bus.h"
31 #include "qemu/module.h"
32 #include "hw/pci-bridge/simba.h"
33
34 /*
35 * Chipset docs:
36 * APB: "Advanced PCI Bridge (APB) User's Manual",
37 * http://www.sun.com/processors/manuals/805-1251.pdf
38 */
39
simba_pci_bridge_realize(PCIDevice * dev,Error ** errp)40 static void simba_pci_bridge_realize(PCIDevice *dev, Error **errp)
41 {
42 /*
43 * command register:
44 * According to PCI bridge spec, after reset
45 * bus master bit is off
46 * memory space enable bit is off
47 * According to manual (805-1251.pdf).
48 * the reset value should be zero unless the boot pin is tied high
49 * (which is true) and thus it should be PCI_COMMAND_MEMORY.
50 */
51 SimbaPCIBridge *br = SIMBA_PCI_BRIDGE(dev);
52
53 pci_bridge_initfn(dev, TYPE_PCI_BUS);
54
55 pci_set_word(dev->config + PCI_COMMAND, PCI_COMMAND_MEMORY);
56 pci_set_word(dev->config + PCI_STATUS,
57 PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
58 PCI_STATUS_DEVSEL_MEDIUM);
59
60 /* Allow 32-bit IO addresses */
61 pci_set_word(dev->config + PCI_IO_BASE, PCI_IO_RANGE_TYPE_32);
62 pci_set_word(dev->config + PCI_IO_LIMIT, PCI_IO_RANGE_TYPE_32);
63 pci_set_word(dev->wmask + PCI_IO_BASE_UPPER16, 0xffff);
64 pci_set_word(dev->wmask + PCI_IO_LIMIT_UPPER16, 0xffff);
65
66 pci_bridge_update_mappings(PCI_BRIDGE(br));
67 }
68
simba_pci_bridge_class_init(ObjectClass * klass,void * data)69 static void simba_pci_bridge_class_init(ObjectClass *klass, void *data)
70 {
71 DeviceClass *dc = DEVICE_CLASS(klass);
72 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
73
74 k->realize = simba_pci_bridge_realize;
75 k->exit = pci_bridge_exitfn;
76 k->vendor_id = PCI_VENDOR_ID_SUN;
77 k->device_id = PCI_DEVICE_ID_SUN_SIMBA;
78 k->revision = 0x11;
79 k->config_write = pci_bridge_write_config;
80 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
81 device_class_set_legacy_reset(dc, pci_bridge_reset);
82 dc->vmsd = &vmstate_pci_device;
83 }
84
85 static const TypeInfo simba_pci_bridge_info = {
86 .name = TYPE_SIMBA_PCI_BRIDGE,
87 .parent = TYPE_PCI_BRIDGE,
88 .class_init = simba_pci_bridge_class_init,
89 .instance_size = sizeof(SimbaPCIBridge),
90 .interfaces = (InterfaceInfo[]) {
91 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
92 { },
93 },
94 };
95
simba_register_types(void)96 static void simba_register_types(void)
97 {
98 type_register_static(&simba_pci_bridge_info);
99 }
100
101 type_init(simba_register_types)
102