1 files changed, 144 insertions, 0 deletions
diff --git a/src/kernel/HALKit/AMD64/Network/Generic+Basic+BNID.cpp b/src/kernel/HALKit/AMD64/Network/Generic+Basic+BNID.cpp
new file mode 100644
index 00000000..4c1d0f1f
--- /dev/null
+++ b/src/kernel/HALKit/AMD64/Network/Generic+Basic+BNID.cpp
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright 2024-2026, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/ne-foss-org/nekernel
+
+#include <DmaKit/DmaPool.h>
+#include <HALKit/AMD64/Processor.h>
+#include <KernelKit/PCI/Iterator.h>
+#include <modules/ACPI/ACPIFactoryInterface.h>
+
+/// @note BNID (RTL8139' Basic Network Interface) driver
+
+#define kNetDevID (0x8139)
+#define kNetSubClass (0x10EC)
+
+using namespace Kernel;
+using namespace Kernel::HAL;
+
+STATIC UInt16 kRTLIOBase = 0xFFFF;
+
+STATIC UInt32                 kRXOffset     = 0UL;
+STATIC constexpr CONST UInt32 kRXBufferSize = 8192 + 16 + 1500;
+
+STATIC UInt8* kRXUpperLayer = nullptr;
+STATIC UInt8* kRXBuffer     = nullptr;
+
+STATIC PCI::Device kNetDev;
+
+/***********************************************************************************/
+///@brief BNID Init routine.
+/***********************************************************************************/
+
+EXTERN_C BOOL rtl_init_nic_rtl8139() {
+  STATIC BOOL kTXRXEnabled = NO;
+  if (kTXRXEnabled) return NO;
+
+  PCI::Iterator iterator(Types::PciDeviceKind::NetworkController, 0x00);
+
+  for (SizeT device_index = 0; device_index < NE_BUS_COUNT; ++device_index) {
+    kNetDev = iterator[device_index].Leak();  // Leak device.
+
+    if (kNetDev.VendorId() == kNetSubClass && kNetDev.DeviceId() == kNetDevID) {
+      kNetDev.EnableMmio();
+      kNetDev.BecomeBusMaster();
+
+      break;
+    }
+  }
+
+  kRTLIOBase = kNetDev.Bar(0);
+
+  MUST_PASS(kRTLIOBase != 0xFFFF);
+
+  kRXBuffer = reinterpret_cast<UInt8*>(rtl_dma_alloc(sizeof(UInt8) * kRXBufferSize, 0));
+
+  /// Reset first.
+
+  rt_out8(kRTLIOBase + 0x37, 0x10);
+
+  UInt16 timeout = 0U;
+
+  while (rt_in8(kRTLIOBase + 0x37) & 0x10) {
+    ++timeout;
+    if (timeout > 0x1000) break;
+  }
+
+  rt_out32(kRTLIOBase + 0x30, (UInt32) (UIntPtr) kRXBuffer);
+
+  rt_out8(kRTLIOBase + 0x37, 0x0C);
+
+  rt_out32(kRTLIOBase + 0x44, 0xF | (1 << 7));
+
+  rt_out16(kRTLIOBase + 0x3C, 0x0005);
+
+  kTXRXEnabled = YES;
+
+  kout << "The Basic Network Interface Driver (BNID) has been initialized.\r";
+
+  return YES;
+}
+
+/***********************************************************************************/
+/// @brief BNID I/O interrupt handler.
+/// @param rsp stack pointer.
+/// @note This function is called when the device interrupts to retrieve network data.
+/***********************************************************************************/
+
+EXTERN_C Void rtl_rtl8139_interrupt_handler(UIntPtr rsp) {
+  if (kRTLIOBase == 0xFFFF || kRTLIOBase == 0) return;
+
+  NE_UNUSED(rsp);
+
+  UInt16 status = rt_in16(kRTLIOBase + 0x3E);
+  rt_out16(kRTLIOBase + 0x3E, status);
+
+  if (status & 0x01) {
+    // While we receive data.
+    while ((rt_in8(kRTLIOBase + 0x37) & 0x01) == 0) {
+      // We grab an offset from the RX buffer.
+      UInt32 offset = kRXOffset % kRXBufferSize;
+
+      // If the offset is too high, we reset it.
+      if (offset >= (kRXBufferSize - 16)) {
+        kRXOffset = 0UL;
+        offset    = 0UL;
+      }
+
+      volatile UInt8* packet = kRXBuffer + offset + 4;
+      UInt16          len    = *(UInt16*) (kRXBuffer + offset + 2);
+
+      kRXUpperLayer[(offset + 4)] = *packet;
+      kRXOffset += (len + 4);
+
+      rt_out16(kRTLIOBase + 0x38, (UInt16) (kRXOffset - 16));
+    }
+  }
+
+  if (!(status & 0x04)) {
+    err_global_get() = kErrorNoNetwork;
+  }
+}
+
+/***********************************************************************************/
+/// @brief BNID get upper layer function
+/// @return the upper layer.
+/// @retval nullptr if no upper layer is set.
+/// @retval pointer to the upper layer if set.
+/***********************************************************************************/
+
+EXTERN_C UInt8* rtl_rtl8139_get_upper_layer() {
+  return kRXUpperLayer;
+}
+
+/***********************************************************************************/
+/// @brief BNID set upper layer function
+/// @param layer the upper layer.
+/***********************************************************************************/
+
+EXTERN_C BOOL rtl_rtl8139_set_upper_layer(UInt8* layer) {
+  if (!layer) return NO;
+  kRXUpperLayer = layer;
+
+  return YES;
+}