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1 /*
2  * QEMU Grackle PCI host (heathrow OldWorld PowerMac)
3  *
4  * Copyright (c) 2006-2007 Fabrice Bellard
5  * Copyright (c) 2007 Jocelyn Mayer
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a copy
8  * of this software and associated documentation files (the "Software"), to deal
9  * in the Software without restriction, including without limitation the rights
10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11  * copies of the Software, and to permit persons to whom the Software is
12  * furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23  * THE SOFTWARE.
24  */
25
26 #include "sysbus.h"
27 #include "ppc_mac.h"
28 #include "pci.h"
29 #include "pci_host.h"
30
31 /* debug Grackle */
32 //#define DEBUG_GRACKLE
33
34 #ifdef DEBUG_GRACKLE
35 #define GRACKLE_DPRINTF(fmt, ...)                               \
36     do { printf("GRACKLE: " fmt , ## __VA_ARGS__); } while (0)
37 #else
38 #define GRACKLE_DPRINTF(fmt, ...)
39 #endif
40
41 typedef struct GrackleState {
42     SysBusDevice busdev;
43     PCIHostState host_state;
44 } GrackleState;
45
46 /* Don't know if this matches real hardware, but it agrees with OHW.  */
47 static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)
48 {
49     return (irq_num + (pci_dev->devfn >> 3)) & 3;
50 }
51
52 static void pci_grackle_set_irq(void *opaque, int irq_num, int level)
53 {
54     qemu_irq *pic = opaque;
55
56     GRACKLE_DPRINTF("set_irq num %d level %d\n", irq_num, level);
57     qemu_set_irq(pic[irq_num + 0x15], level);
58 }
59
60 static void pci_grackle_reset(void *opaque)
61 {
62 }
63
64 PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic,
65                          MemoryRegion *address_space_mem,
66                          MemoryRegion *address_space_io)
67 {
68     DeviceState *dev;
69     SysBusDevice *s;
70     GrackleState *d;
71
72     dev = qdev_create(NULL, "grackle");
73     qdev_init_nofail(dev);
74     s = sysbus_from_qdev(dev);
75     d = FROM_SYSBUS(GrackleState, s);
76     d->host_state.bus = pci_register_bus(&d->busdev.qdev, "pci",
77                                          pci_grackle_set_irq,
78                                          pci_grackle_map_irq,
79                                          pic,
80                                          address_space_mem,
81                                          address_space_io,
82                                          0, 4);
83
84     pci_create_simple(d->host_state.bus, 0, "grackle");
85
86     sysbus_mmio_map(s, 0, base);
87     sysbus_mmio_map(s, 1, base + 0x00200000);
88
89     return d->host_state.bus;
90 }
91
92 static int pci_grackle_init_device(SysBusDevice *dev)
93 {
94     GrackleState *s;
95     int pci_mem_config, pci_mem_data;
96
97     s = FROM_SYSBUS(GrackleState, dev);
98
99     pci_mem_config = pci_host_conf_register_mmio(&s->host_state,
100                                                  DEVICE_LITTLE_ENDIAN);
101     pci_mem_data = pci_host_data_register_mmio(&s->host_state,
102                                                DEVICE_LITTLE_ENDIAN);
103     sysbus_init_mmio(dev, 0x1000, pci_mem_config);
104     sysbus_init_mmio(dev, 0x1000, pci_mem_data);
105
106     qemu_register_reset(pci_grackle_reset, &s->host_state);
107     return 0;
108 }
109
110 static int grackle_pci_host_init(PCIDevice *d)
111 {
112     d->config[0x09] = 0x01;
113     return 0;
114 }
115
116 static PCIDeviceInfo grackle_pci_host_info = {
117     .qdev.name = "grackle",
118     .qdev.size = sizeof(PCIDevice),
119     .init      = grackle_pci_host_init,
120     .vendor_id = PCI_VENDOR_ID_MOTOROLA,
121     .device_id = PCI_DEVICE_ID_MOTOROLA_MPC106,
122     .revision  = 0x00,
123     .class_id  = PCI_CLASS_BRIDGE_HOST,
124 };
125
126 static void grackle_register_devices(void)
127 {
128     sysbus_register_dev("grackle", sizeof(GrackleState),
129                         pci_grackle_init_device);
130     pci_qdev_register(&grackle_pci_host_info);
131 }
132
133 device_init(grackle_register_devices)
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