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Kernel: Create support for PCI ECAM

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The new PCI subsystem is initialized during runtime.
PCI::Initializer is supposed to be called during early boot, to
perform a few tests, and initialize the proper configuration space
access mechanism. Kernel boot parameters can be specified by a user to
determine what tests will occur, to aid debugging on problematic
machines.
After that, PCI::Initializer should be dismissed.

PCI::IOAccess is a class that is derived from PCI::Access
class and implements PCI configuration space access mechanism via x86
IO ports.
PCI::MMIOAccess is a class that is derived from PCI::Access
and implements PCI configurtaion space access mechanism via memory
access.

The new PCI subsystem also supports determination of IO/MMIO space
needed by a device by checking a given BAR.
In addition, Every device or component that use the PCI subsystem has
changed to match the last changes.
This commit is contained in:
Liav A 2019-12-31 13:04:30 +02:00 • committed by Andreas Kling
parent d85874be4b
commit e5ffa960d7
20 changed files with 878 additions and 16 deletions
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6
Userland/lspci.cpp
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@ -24,7 +24,7 @@ int main(int argc, char** argv)
auto json = JsonValue::from_string(file_contents).as_array();
json.for_each([db](auto& value) {
auto dev = value.as_object();
auto seg = dev.get("seg").to_u32();
auto bus = dev.get("bus").to_u32();
auto slot = dev.get("slot").to_u32();
auto function = dev.get("function").to_u32();
@ -48,8 +48,8 @@ int main(int argc, char** argv)
if (class_ptr != "")
class_name = class_ptr;
printf("%02x:%02x.%d %s: %s %s (rev %02x)\n",
bus, slot, function,
printf("%04x:%02x:%02x.%d %s: %s %s (rev %02x)\n",
seg, bus, slot, function,
class_name.characters(), vendor_name.characters(),
device_name.characters(), revision_id);
});