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#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("bus: "); print_num(bus, 16, 2);
print(" dev: "); print_num(dev, 16, 1);
print(" vendor: "); print_num(x & 0xFFFF, 16, 4);
print(" id: "); print_num((x >> 16) & 0xFFFF, 16, 4);
print("\n");
}
}
}
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