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Kernel: Create support for PCI ECAM
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.
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20 changed files with 878 additions and 16 deletions
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@ -22,7 +22,7 @@
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#include <Kernel/Net/Routing.h>
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#include <Kernel/Net/TCPSocket.h>
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#include <Kernel/Net/UDPSocket.h>
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#include <Kernel/PCI.h>
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#include <Kernel/PCI/Access.h>
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#include <Kernel/Profiling.h>
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#include <Kernel/VM/MemoryManager.h>
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#include <Kernel/VM/PurgeableVMObject.h>
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@ -289,6 +289,7 @@ Optional<KBuffer> procfs$pci(InodeIdentifier)
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JsonArraySerializer array { builder };
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PCI::enumerate_all([&array](PCI::Address address, PCI::ID id) {
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auto obj = array.add_object();
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obj.add("seg", address.seg());
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obj.add("bus", address.bus());
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obj.add("slot", address.slot());
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obj.add("function", address.function());
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