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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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3
Kernel/FileSystem/ProcFS.cpp
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@ -22,7 +22,7 @@
#include <Kernel/Net/Routing.h>
#include <Kernel/Net/TCPSocket.h>
#include <Kernel/Net/UDPSocket.h>
#include <Kernel/PCI.h>
#include <Kernel/PCI/Access.h>
#include <Kernel/Profiling.h>
#include <Kernel/VM/MemoryManager.h>
#include <Kernel/VM/PurgeableVMObject.h>
@ -289,6 +289,7 @@ Optional<KBuffer> procfs$pci(InodeIdentifier)
JsonArraySerializer array { builder };
PCI::enumerate_all([&array](PCI::Address address, PCI::ID id) {
auto obj = array.add_object();
obj.add("seg", address.seg());
obj.add("bus", address.bus());
obj.add("slot", address.slot());
obj.add("function", address.function());