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Assign PCI header fields to named variables

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This commit is contained in:
Josh Holtrop 2023-02-24 20:53:46 -05:00
parent f5e5c40c12
commit cc891f6d4d
1 changed files with 15 additions and 12 deletions
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27
src/hulk/pci.d
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@ -11,25 +11,28 @@ struct Pci
/* IO address for PCI configuration data. */
enum IO_ADDR_CONFIG_DATA = 0xCFCu;
private static ulong read_config_register(ulong bus_id, ulong device_id, ulong register_id)
private static ulong read_config_register(ulong bus_id, ulong device_idx, ulong register_id)
{
ulong addr = 0x8000_0000u | (bus_id << 16u) | (device_id << 11u) | (register_id << 2u);
ulong addr = 0x8000_0000u | (bus_id << 16u) | (device_idx << 11u) | (register_id << 2u);
out32(IO_ADDR_CONFIG_ADDRESS, addr);
return in32(IO_ADDR_CONFIG_DATA);
}
private static void scan(ulong bus_id, ulong device_id)
private static void scan(ulong bus_id, ulong device_idx)
{
ulong reg0 = read_config_register(bus_id, device_id, 0u);
ulong reg0 = read_config_register(bus_id, device_idx, 0u);
if (reg0 != 0xFFFFFFFFu)
{
ulong reg2 = read_config_register(bus_id, device_id, 2u);
ulong reg2 = read_config_register(bus_id, device_idx, 2u);
ushort vendor_id = reg0 & 0xFFFFu;
ushort device_id = (reg0 >> 16u) & 0xFFFFu;
ubyte class_code = (reg2 >> 24u) & 0xFFu;
ubyte subclass = (reg2 >> 16u) & 0xFFu;
ubyte prog_if = (reg2 >> 8u) & 0xFFu;
Klog.writefln("Found PCI device %04x:%04x (%02x:%02x:%02x) at %02u:%02u",
(reg0 & 0xFFFFu), (reg0 >> 16u),
(reg2 >> 24u) & 0xFFu,
(reg2 >> 16u) & 0xFFu,
(reg2 >> 8u) & 0xFFu,
bus_id, device_id);
vendor_id, device_id,
class_code, subclass, prog_if,
bus_id, device_idx);
}
}
@ -38,9 +41,9 @@ struct Pci
Klog.writefln("Scanning PCI devices...");
for (ulong bus_id = 0u; bus_id < 256u; bus_id++)
{
for (ulong device_id = 0u; device_id < 32u; device_id++)
for (ulong device_idx = 0u; device_idx < 32u; device_idx++)
{
scan(bus_id, device_id);
scan(bus_id, device_idx);
}
}
Klog.writefln("PCI scan complete.");