From 83d870e58457a1d335a1d9b9966a6a1887cc297b Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal@nekernel.org>
Date: Mon, 24 Nov 2025 03:02:43 +0100
Subject: feat! breaking changes on kernel sources.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>
---
 src/kernel/KernelKit/PCI/Device.h | 73 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 src/kernel/KernelKit/PCI/Device.h

(limited to 'src/kernel/KernelKit/PCI/Device.h')

diff --git a/src/kernel/KernelKit/PCI/Device.h b/src/kernel/KernelKit/PCI/Device.h
new file mode 100644
index 00000000..f2111e40
--- /dev/null
+++ b/src/kernel/KernelKit/PCI/Device.h
@@ -0,0 +1,73 @@
+/* ========================================
+
+  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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