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Read PCI device header type

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This commit is contained in:
Josh Holtrop 2023-06-10 12:01:06 -04:00
parent a0c62937ff
commit 5179b5881b
1 changed files with 4 additions and 5 deletions
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7
src/hulk/pci.d
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@ -33,6 +33,7 @@ struct Pci
ubyte subclass_id;
ubyte if_id;
bool multifunction;
ubyte header_type;
void initialize(Address address, ushort vendor_id, ushort device_id)
{
@ -46,11 +47,9 @@ struct Pci
vendor_id, device_id,
class_id, subclass_id, if_id,
address.bus_nr, address.device_nr, address.function_nr);
if (address.function_nr == 0u)
{
uint reg3 = read_config_register(address, 3u);
multifunction = (reg3 & (1u << 23u)) != 0u;
}
header_type = (reg3 >> 16u) & 0x7Fu;
multifunction = (address.function_nr == 0u) && ((reg3 & (1u << 23u)) != 0u);
}
}