1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <device/mmio.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#if (CONFIG_MMCONF_BASE_ADDRESS == 0)
#error "CONFIG_MMCONF_BASE_ADDRESS needs to be non-zero!"
#endif
/*
* Functions for accessing PCI configuration space with mmconf accesses
*/
#define PCI_MMIO_ADDR(dev, where, mask) \
((void *)(((uintptr_t)CONFIG_MMCONF_BASE_ADDRESS |\
(((dev)->bus->secondary & 0xFFF) << 20) |\
(((dev)->path.pci.devfn & 0xFF) << 12) |\
((where) & 0xFFF)) & ~mask))
static uint8_t pci_mmconf_read_config8(struct device *dev, int where)
{
return read8(PCI_MMIO_ADDR(dev, where, 0));
}
static uint16_t pci_mmconf_read_config16(struct device *dev, int where)
{
return read16(PCI_MMIO_ADDR(dev, where, 1));
}
static uint32_t pci_mmconf_read_config32(struct device *dev, int where)
{
return read32(PCI_MMIO_ADDR(dev, where, 3));
}
static void pci_mmconf_write_config8(struct device *dev, int where,
uint8_t value)
{
write8(PCI_MMIO_ADDR(dev, where, 0), value);
}
static void pci_mmconf_write_config16(struct device *dev, int where,
uint16_t value)
{
write16(PCI_MMIO_ADDR(dev, where, 1), value);
}
static void pci_mmconf_write_config32(struct device *dev, int where,
uint32_t value)
{
write32(PCI_MMIO_ADDR(dev, where, 3), value);
}
static const struct pci_bus_operations pci_ops_mmconf = {
.read8 = pci_mmconf_read_config8,
.read16 = pci_mmconf_read_config16,
.read32 = pci_mmconf_read_config32,
.write8 = pci_mmconf_write_config8,
.write16 = pci_mmconf_write_config16,
.write32 = pci_mmconf_write_config32,
};
const struct pci_bus_operations *pci_bus_default_ops(void)
{
return &pci_ops_mmconf;
}
|
