kernel: lots of tweaks and improvements, WIP: ASN, FileMgr support for OpenHeFS.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

1 files changed, 164 insertions, 0 deletions

diff --git a/src/kernel/HALKit/AMD64/HalKernelMain.cpp b/src/kernel/HALKit/AMD64/HalKernelMain.cpp
new file mode 100644
index 00000000..7e6579de
--- /dev/null
+++ b/src/kernel/HALKit/AMD64/HalKernelMain.cpp
@@ -0,0 +1,164 @@
+// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/nekernel-org/nekernel
+
+#include <ArchKit/ArchKit.h>
+#include <CFKit/Property.h>
+#include <FirmwareKit/EFI/API.h>
+#include <FirmwareKit/EFI/EFI.h>
+#include <KernelKit/CodeMgr.h>
+#include <KernelKit/HardwareThreadScheduler.h>
+#include <KernelKit/PEFCodeMgr.h>
+#include <KernelKit/ProcessScheduler.h>
+#include <KernelKit/Timer.h>
+#include <NetworkKit/IPC.h>
+#include <StorageKit/AHCI.h>
+#include <misc/BenchKit/HWChronometer.h>
+#include <modules/ACPI/ACPIFactoryInterface.h>
+#include <modules/CoreGfx/TextGfx.h>
+
+#ifndef __NE_MODULAR_KERNEL_COMPONENTS__
+EXTERN_C Kernel::VoidPtr kInterruptVectorTable[];
+
+/// @brief Kernel init function.
+/// @param handover_hdr Handover boot header.
+EXTERN_C Kernel::Int32 hal_init_platform(Kernel::HEL::BootInfoHeader* handover_hdr) {
+  using namespace Kernel;
+
+  if (handover_hdr->f_Magic != kHandoverMagic && handover_hdr->f_Version != kHandoverVersion) {
+    return kEfiFail;
+  }
+
+  HAL::rt_sti();
+
+  fw_init_efi((EfiSystemTable*) handover_hdr->f_FirmwareCustomTables[1]);
+
+  Boot::ExitBootServices(handover_hdr->f_HardwareTables.f_ImageKey,
+                         handover_hdr->f_HardwareTables.f_ImageHandle);
+
+  kHandoverHeader = handover_hdr;
+
+  kKernelVM = kHandoverHeader->f_PageStart;
+
+  if (!kKernelVM) {
+    MUST_PASS(kKernelVM);
+    return kEfiFail;
+  }
+
+  hal_write_cr3(kKernelVM);
+
+  /************************************** */
+  /*     INITIALIZE BIT MAP.              */
+  /************************************** */
+
+  kBitMapCursor    = 0UL;
+  kKernelBitMpSize = kHandoverHeader->f_BitMapSize;
+  kKernelBitMpStart =
+      reinterpret_cast<VoidPtr>(reinterpret_cast<UIntPtr>(kHandoverHeader->f_BitMapStart));
+
+  /************************************** */
+  /*     INITIALIZE GDT AND SEGMENTS. */
+  /************************************** */
+
+  STATIC CONST auto kGDTEntriesCount = 8;
+
+  STATIC HAL::Detail::NE_TSS kKernelTSS{};
+
+  kKernelTSS.fRsp0 = (UInt64) kHandoverHeader->f_StackTop;
+  kKernelTSS.fIopb = sizeof(HAL::Detail::NE_TSS);
+
+  /* The GDT, mostly descriptors for user and kernel segments. */
+  STATIC HAL::Detail::NE_GDT_ENTRY ALIGN(0x08) kGDTArray[kGDTEntriesCount] = {
+      {.fLimitLow   = 0,
+       .fBaseLow    = 0,
+       .fBaseMid    = 0,
+       .fAccessByte = 0x00,
+       .fFlags      = 0x00,
+       .fBaseHigh   = 0},  // Null entry
+      {.fLimitLow   = 0x0,
+       .fBaseLow    = 0,
+       .fBaseMid    = 0,
+       .fAccessByte = 0x9A,
+       .fFlags      = 0xAF,
+       .fBaseHigh   = 0},  // Kernel code
+      {.fLimitLow   = 0x0,
+       .fBaseLow    = 0,
+       .fBaseMid    = 0,
+       .fAccessByte = 0x92,
+       .fFlags      = 0xCF,
+       .fBaseHigh   = 0},  // Kernel data
+      {},                // TSS data low
+      {},                // TSS data high
+      {.fLimitLow   = 0x0,
+       .fBaseLow    = 0,
+       .fBaseMid    = 0,
+       .fAccessByte = 0xFA,
+       .fFlags      = 0xAF,
+       .fBaseHigh   = 0},  // User code
+      {.fLimitLow   = 0x0,
+       .fBaseLow    = 0,
+       .fBaseMid    = 0,
+       .fAccessByte = 0xF2,
+       .fFlags      = 0xCF,
+       .fBaseHigh   = 0},  // User data
+  };
+
+  kGDTArray[3].fLimitLow   = sizeof(HAL::Detail::NE_TSS) - 1;
+  kGDTArray[3].fBaseLow    = ((UIntPtr) &kKernelTSS) & 0xFFFF;
+  kGDTArray[3].fBaseMid    = (((UIntPtr) &kKernelTSS) >> 16) & 0xFF;
+  kGDTArray[3].fAccessByte = 0x89;  // Present, type 9 = 64-bit available TSS
+  kGDTArray[3].fFlags      = 0x20 | ((((UIntPtr) &kKernelTSS) >> 24) & 0x0F);
+  kGDTArray[3].fBaseHigh   = (((UIntPtr) &kKernelTSS) >> 24) & 0xFF;
+
+  kGDTArray[4].fLimitLow   = ((UIntPtr) &kKernelTSS >> 32) & 0xFFFF;
+  kGDTArray[4].fBaseLow    = 0;
+  kGDTArray[4].fBaseMid    = 0;
+  kGDTArray[4].fAccessByte = 0;
+  kGDTArray[4].fFlags      = 0;
+  kGDTArray[4].fBaseHigh   = 0;
+
+  FB::cg_clear_video();
+
+  // Load memory descriptors.
+  HAL::Register64 gdt_reg;
+
+  gdt_reg.Base  = reinterpret_cast<UIntPtr>(kGDTArray);
+  gdt_reg.Limit = (sizeof(HAL::Detail::NE_GDT_ENTRY) * kGDTEntriesCount) - 1;
+
+  //! GDT will load hal_read_init after it successfully loads the segments.
+  HAL::GDTLoader gdt_loader;
+  gdt_loader.Load(gdt_reg);
+
+  return kEfiFail;
+}
+
+EXTERN_C Kernel::Void hal_real_init(Kernel::Void) {
+  HAL::mp_init_cores(kHandoverHeader->f_HardwareTables.f_VendorPtr);
+
+  HAL::Register64 idt_reg;
+  idt_reg.Base = reinterpret_cast<UIntPtr>(kInterruptVectorTable);
+
+  HAL::IDTLoader idt_loader;
+  idt_loader.Load(idt_reg);
+
+#ifdef __FSKIT_INCLUDES_OPENHEFS__
+  OpenHeFS::fs_init_openhefs();
+  HeFileSystemMgr::Mount(new HeFileSystemMgr());
+#endif
+
+#ifdef __FSKIT_INCLUDES_NEFS__
+  NeFS::fs_init_nefs();
+  NeFileSystemMgr::Mount(new NeFileSystemMgr());
+#endif
+
+  UserProcessScheduler::The().SwitchTeam(kRTUserTeam);
+
+  PEFLoader ldr("/system/init.out");
+
+  if (ldr.IsLoaded()) rtl_create_user_process(ldr, UserProcess::ExecutableKind::kExecutableKind);
+
+  UserProcessScheduler::The().SwitchTeam(kMidUserTeam);
+
+  while (YES);
+}
+#endif  // ifndef __NE_MODULAR_KERNEL_COMPONENTS__