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
|
#include "pci.h"
#include "def.h"
#include "io.h"
#include "font.h"
#define PCI_CONFIG_ADDRESS 0xCF8
#define PCI_CONFIG_DATA 0xCFC
void pci_enumerate()
{
typedef struct __attribute__((packed)) {
u8 offset;
unsigned int func : 3;
unsigned int dev : 5;
u8 bus;
unsigned int reserved : 7;
bool enable : 1;
} pci_config_addr;
for (int bus = 0; bus < 256; bus++)
for (int dev = 0; dev < 32; dev++) {
pci_config_addr addr = {
.offset = 0,
.func = 0,
.dev = dev,
.bus = bus,
.enable = true,
};
outl(PCI_CONFIG_ADDRESS, BITCAST(addr, pci_config_addr, u32));
u32 x = inl(PCI_CONFIG_DATA);
if (x != 0xFFFFFFFF) {
print(S("bus: ")); print_num_pad(bus, 16, 2, ' ');
print(S(" dev: ")); print_num_pad(dev, 16, 1, ' ');
print(S(" vendor: ")); print_num_pad(x & 0xFFFF, 16, 4, ' ');
print(S(" id: ")); print_num_pad((x >> 16) & 0xFFFF, 16, 4, ' ');
print(S("\n"));
}
}
}
|
