root / hw / pci / pci_host.c @ ddf5636d
History | View | Annotate | Download (5.6 kB)
1 |
/*
|
---|---|
2 |
* pci_host.c
|
3 |
*
|
4 |
* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
|
5 |
* VA Linux Systems Japan K.K.
|
6 |
*
|
7 |
* This program is free software; you can redistribute it and/or modify
|
8 |
* it under the terms of the GNU General Public License as published by
|
9 |
* the Free Software Foundation; either version 2 of the License, or
|
10 |
* (at your option) any later version.
|
11 |
|
12 |
* This program is distributed in the hope that it will be useful,
|
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
15 |
* GNU General Public License for more details.
|
16 |
|
17 |
* You should have received a copy of the GNU General Public License along
|
18 |
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
19 |
*/
|
20 |
|
21 |
#include "hw/pci/pci.h" |
22 |
#include "hw/pci/pci_host.h" |
23 |
#include "trace.h" |
24 |
|
25 |
/* debug PCI */
|
26 |
//#define DEBUG_PCI
|
27 |
|
28 |
#ifdef DEBUG_PCI
|
29 |
#define PCI_DPRINTF(fmt, ...) \
|
30 |
do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0) |
31 |
#else
|
32 |
#define PCI_DPRINTF(fmt, ...)
|
33 |
#endif
|
34 |
|
35 |
/*
|
36 |
* PCI address
|
37 |
* bit 16 - 24: bus number
|
38 |
* bit 8 - 15: devfun number
|
39 |
* bit 0 - 7: offset in configuration space of a given pci device
|
40 |
*/
|
41 |
|
42 |
/* the helper function to get a PCIDevice* for a given pci address */
|
43 |
static inline PCIDevice *pci_dev_find_by_addr(PCIBus *bus, uint32_t addr) |
44 |
{ |
45 |
uint8_t bus_num = addr >> 16;
|
46 |
uint8_t devfn = addr >> 8;
|
47 |
|
48 |
return pci_find_device(bus, bus_num, devfn);
|
49 |
} |
50 |
|
51 |
void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr,
|
52 |
uint32_t limit, uint32_t val, uint32_t len) |
53 |
{ |
54 |
assert(len <= 4);
|
55 |
trace_pci_cfg_write(pci_dev->name, PCI_SLOT(pci_dev->devfn), |
56 |
PCI_FUNC(pci_dev->devfn), addr, val); |
57 |
pci_dev->config_write(pci_dev, addr, val, MIN(len, limit - addr)); |
58 |
} |
59 |
|
60 |
uint32_t pci_host_config_read_common(PCIDevice *pci_dev, uint32_t addr, |
61 |
uint32_t limit, uint32_t len) |
62 |
{ |
63 |
uint32_t ret; |
64 |
|
65 |
assert(len <= 4);
|
66 |
ret = pci_dev->config_read(pci_dev, addr, MIN(len, limit - addr)); |
67 |
trace_pci_cfg_read(pci_dev->name, PCI_SLOT(pci_dev->devfn), |
68 |
PCI_FUNC(pci_dev->devfn), addr, ret); |
69 |
|
70 |
return ret;
|
71 |
} |
72 |
|
73 |
void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len) |
74 |
{ |
75 |
PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr); |
76 |
uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
|
77 |
|
78 |
if (!pci_dev) {
|
79 |
return;
|
80 |
} |
81 |
|
82 |
PCI_DPRINTF("%s: %s: addr=%02" PRIx32 " val=%08" PRIx32 " len=%d\n", |
83 |
__func__, pci_dev->name, config_addr, val, len); |
84 |
pci_host_config_write_common(pci_dev, config_addr, PCI_CONFIG_SPACE_SIZE, |
85 |
val, len); |
86 |
} |
87 |
|
88 |
uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len)
|
89 |
{ |
90 |
PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr); |
91 |
uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
|
92 |
uint32_t val; |
93 |
|
94 |
if (!pci_dev) {
|
95 |
return ~0x0; |
96 |
} |
97 |
|
98 |
val = pci_host_config_read_common(pci_dev, config_addr, |
99 |
PCI_CONFIG_SPACE_SIZE, len); |
100 |
PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRIx32" len=%d\n", |
101 |
__func__, pci_dev->name, config_addr, val, len); |
102 |
|
103 |
return val;
|
104 |
} |
105 |
|
106 |
static void pci_host_config_write(void *opaque, hwaddr addr, |
107 |
uint64_t val, unsigned len)
|
108 |
{ |
109 |
PCIHostState *s = opaque; |
110 |
|
111 |
PCI_DPRINTF("%s addr " TARGET_FMT_plx " len %d val %"PRIx64"\n", |
112 |
__func__, addr, len, val); |
113 |
if (addr != 0 || len != 4) { |
114 |
return;
|
115 |
} |
116 |
s->config_reg = val; |
117 |
} |
118 |
|
119 |
static uint64_t pci_host_config_read(void *opaque, hwaddr addr, |
120 |
unsigned len)
|
121 |
{ |
122 |
PCIHostState *s = opaque; |
123 |
uint32_t val = s->config_reg; |
124 |
|
125 |
PCI_DPRINTF("%s addr " TARGET_FMT_plx " len %d val %"PRIx32"\n", |
126 |
__func__, addr, len, val); |
127 |
return val;
|
128 |
} |
129 |
|
130 |
static void pci_host_data_write(void *opaque, hwaddr addr, |
131 |
uint64_t val, unsigned len)
|
132 |
{ |
133 |
PCIHostState *s = opaque; |
134 |
PCI_DPRINTF("write addr " TARGET_FMT_plx " len %d val %x\n", |
135 |
addr, len, (unsigned)val);
|
136 |
if (s->config_reg & (1u << 31)) |
137 |
pci_data_write(s->bus, s->config_reg | (addr & 3), val, len);
|
138 |
} |
139 |
|
140 |
static uint64_t pci_host_data_read(void *opaque, |
141 |
hwaddr addr, unsigned len)
|
142 |
{ |
143 |
PCIHostState *s = opaque; |
144 |
uint32_t val; |
145 |
if (!(s->config_reg & (1 << 31))) |
146 |
return 0xffffffff; |
147 |
val = pci_data_read(s->bus, s->config_reg | (addr & 3), len);
|
148 |
PCI_DPRINTF("read addr " TARGET_FMT_plx " len %d val %x\n", |
149 |
addr, len, val); |
150 |
return val;
|
151 |
} |
152 |
|
153 |
const MemoryRegionOps pci_host_conf_le_ops = {
|
154 |
.read = pci_host_config_read, |
155 |
.write = pci_host_config_write, |
156 |
.endianness = DEVICE_LITTLE_ENDIAN, |
157 |
}; |
158 |
|
159 |
const MemoryRegionOps pci_host_conf_be_ops = {
|
160 |
.read = pci_host_config_read, |
161 |
.write = pci_host_config_write, |
162 |
.endianness = DEVICE_BIG_ENDIAN, |
163 |
}; |
164 |
|
165 |
const MemoryRegionOps pci_host_data_le_ops = {
|
166 |
.read = pci_host_data_read, |
167 |
.write = pci_host_data_write, |
168 |
.endianness = DEVICE_LITTLE_ENDIAN, |
169 |
}; |
170 |
|
171 |
const MemoryRegionOps pci_host_data_be_ops = {
|
172 |
.read = pci_host_data_read, |
173 |
.write = pci_host_data_write, |
174 |
.endianness = DEVICE_BIG_ENDIAN, |
175 |
}; |
176 |
|
177 |
static const TypeInfo pci_host_type_info = { |
178 |
.name = TYPE_PCI_HOST_BRIDGE, |
179 |
.parent = TYPE_SYS_BUS_DEVICE, |
180 |
.abstract = true,
|
181 |
.class_size = sizeof(PCIHostBridgeClass),
|
182 |
.instance_size = sizeof(PCIHostState),
|
183 |
}; |
184 |
|
185 |
static void pci_host_register_types(void) |
186 |
{ |
187 |
type_register_static(&pci_host_type_info); |
188 |
} |
189 |
|
190 |
type_init(pci_host_register_types) |