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/* ========================================
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
======================================== */
#pragma once
#include <NeKit/Defines.h>
namespace Kernel::PCI {
enum class PciConfigKind : UShort {
ConfigAddress = 0xCF8,
ConfigData = 0xCFC,
CommandReg = 0x0004,
Invalid = 0xFFFF,
};
/// @brief Device interface class
class Device final {
public:
Device() = default;
public:
Device(UShort bus, UShort device, UShort function, UInt32 bar);
Device& operator=(const Device&) = default;
Device(const Device&) = default;
~Device();
public:
UInt Read(UInt bar, Size szData);
void Write(UInt bar, UIntPtr data, Size szData);
public:
operator bool();
public:
template <typename T>
UInt Read(UInt bar) {
static_assert(sizeof(T) <= sizeof(UInt32), "64-bit PCI addressing is unsupported");
return Read(bar, sizeof(T));
}
template <typename T>
void Write(UInt bar, UIntPtr data) {
static_assert(sizeof(T) <= sizeof(UInt32), "64-bit PCI addressing is unsupported");
Write(bar, data, sizeof(T));
}
public:
UShort DeviceId();
UShort VendorId();
UShort InterfaceId();
UChar Class();
UChar Subclass();
UChar ProgIf();
UChar HeaderType();
UIntPtr Bar(UInt32 bar_in);
public:
void EnableMmio();
void BecomeBusMaster(); // for PCI-DMA, PC-DMA does not need that.
UShort Vendor();
private:
UShort fBus;
UShort fDevice;
UShort fFunction;
UInt32 fBar;
};
} // namespace Kernel::PCI
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