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Add Pci.init_device() skeleton

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This commit is contained in:
Josh Holtrop 2023-06-07 16:49:54 -04:00
parent f6fde01b06
commit 8de86dd647
1 changed files with 46 additions and 4 deletions
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50
src/hulk/pci.d
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@ -11,6 +11,21 @@ struct Pci
/* IO address for PCI configuration data. */
enum IO_ADDR_CONFIG_DATA = 0xCFCu;
struct SerialBusController
{
enum ID = 0x0Cu;
struct USBController
{
enum ID = 0x03u;
struct XHCIController
{
enum ID = 0x30u;
}
}
}
private static ulong read_config_register(ulong bus_id, ulong device_idx, ulong register_id)
{
ulong addr = 0x8000_0000u | (bus_id << 16u) | (device_idx << 11u) | (register_id << 2u);
@ -18,6 +33,32 @@ struct Pci
return in32(IO_ADDR_CONFIG_DATA);
}
private static void init_device(ubyte class_id, ubyte subclass_id, ubyte if_id)
{
switch (class_id)
{
case SerialBusController.ID:
switch (subclass_id)
{
case SerialBusController.USBController.ID:
switch (if_id)
{
case SerialBusController.USBController.XHCIController.ID:
/* TODO */
break;
default: break;
}
break;
default: break;
}
break;
default: break;
}
}
private static void scan(ulong bus_id, ulong device_idx)
{
ulong reg0 = read_config_register(bus_id, device_idx, 0u);
@ -26,13 +67,14 @@ struct Pci
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;
ubyte class_id = (reg2 >> 24u) & 0xFFu;
ubyte subclass_id = (reg2 >> 16u) & 0xFFu;
ubyte if_id = (reg2 >> 8u) & 0xFFu;
Klog.writefln("Found PCI device %04x:%04x (%02x:%02x:%02x) at %02u:%02u",
vendor_id, device_id,
class_code, subclass, prog_if,
class_id, subclass_id, if_id,
bus_id, device_idx);
init_device(class_id, subclass_id, if_id);
}
}