From 55059428bfd6a18451bc1ed3ee64e7bb04c395cd Mon Sep 17 00:00:00 2001
From: amlal <amlal@el-mahrouss-logic.com>
Date: Sat, 16 Mar 2024 14:22:21 +0100
Subject: HCR-14: See below.

- Pretty big modifications, add kernel mouse.

Signed-off-by: amlal <amlal@el-mahrouss-logic.com>
---
 Private/HALKit/AMD64/HalDescriptorLoader.cpp | 91 ++++++++++++++++------------
 1 file changed, 53 insertions(+), 38 deletions(-)

(limited to 'Private/HALKit/AMD64/HalDescriptorLoader.cpp')

diff --git a/Private/HALKit/AMD64/HalDescriptorLoader.cpp b/Private/HALKit/AMD64/HalDescriptorLoader.cpp
index 1dbe8e9e..595d52e4 100644
--- a/Private/HALKit/AMD64/HalDescriptorLoader.cpp
+++ b/Private/HALKit/AMD64/HalDescriptorLoader.cpp
@@ -7,63 +7,35 @@
 #include <ArchKit/ArchKit.hpp>
 
 namespace HCore::HAL {
+namespace Detail {
 STATIC RegisterGDT kRegGdt;
-
-void GDTLoader::Load(RegisterGDT &gdt) {
-  MUST_PASS(gdt.Base != 0);
-
-  kRegGdt.Base = gdt.Base;
-  kRegGdt.Limit = gdt.Limit;
-
-  rt_load_gdt(kRegGdt);
-}
-
 STATIC HAL::Register64 kRegIdt;
 
 STATIC ::HCore::Detail::AMD64::InterruptDescriptorAMD64
     kInterruptVectorTable[kKernelIdtSize];
 
-void IDTLoader::Load(Register64 &idt) {
-  volatile ::HCore::UIntPtr **baseIdt = (volatile ::HCore::UIntPtr **)idt.Base;
-  
-  MUST_PASS(baseIdt);
-  
-  for (UInt16 i = 0; i < kKernelIdtSize; i++) {
-    MUST_PASS(baseIdt[i]);
-
-    kInterruptVectorTable[i].Selector = kGdtCodeSelector;
-    kInterruptVectorTable[i].Ist = 0x0;
-    kInterruptVectorTable[i].TypeAttributes = kInterruptGate;
-    kInterruptVectorTable[i].OffsetLow = ((UIntPtr)baseIdt[i] & 0xFFFF);
-    kInterruptVectorTable[i].OffsetMid = (((UIntPtr)baseIdt[i] >> 16) & 0xFFFF);
-    kInterruptVectorTable[i].OffsetHigh =
-        (((UIntPtr)baseIdt[i] >> 32) & 0xFFFFFFFF);
-    kInterruptVectorTable[i].Zero = 0x0;
-  }
-
-  kRegIdt.Base = reinterpret_cast<UIntPtr>(kInterruptVectorTable);
-  kRegIdt.Limit = sizeof(::HCore::Detail::AMD64::InterruptDescriptorAMD64) *
-                  (kKernelIdtSize - 1);
-
-  rt_load_idt(kRegIdt);
-
+STATIC Void RemapPIC(Void) noexcept {
   UInt8 a1, a2;
 
   a1 = HAL::In8(0x21);  // save masks
   a2 = HAL::In8(0xA1);
 
   // Remap PIC.
-  HAL::Out8(0x20, 0x11);
+  HAL::Out8(0x20, 0x10 | 0x01);
   HAL::rt_wait_400ns();
-  HAL::Out8(0xA0, 0x11);
+  HAL::Out8(0xA0, 0x10 | 0x01);
   HAL::rt_wait_400ns();
-  HAL::Out8(0x21, 0x20);
+
+  HAL::Out8(0x21, 0x28);
   HAL::rt_wait_400ns();
-  HAL::Out8(0xA1, 0x28);
+  HAL::Out8(0xA1, 0x30);
+
   HAL::rt_wait_400ns();
+
   HAL::Out8(0x21, 0x04);
   HAL::rt_wait_400ns();
   HAL::Out8(0xA1, 0x02);
+
   HAL::rt_wait_400ns();
   HAL::Out8(0x21, 0x01);
   HAL::rt_wait_400ns();
@@ -72,6 +44,49 @@ void IDTLoader::Load(Register64 &idt) {
   HAL::Out8(0x21, a1);
   HAL::rt_wait_400ns();
   HAL::Out8(0xA1, a2);
+
+  HAL::Out8(0x21, 0xfd);
+  HAL::Out8(0xa1, 0xff);
+}
+} // namespace Detail
+
+/// @brief Loads the provided Global Descriptor Table.
+/// @param gdt 
+/// @return 
+Void GDTLoader::Load(RegisterGDT &gdt) {
+  MUST_PASS(gdt.Base != 0);
+
+  Detail::kRegGdt.Base = gdt.Base;
+  Detail::kRegGdt.Limit = gdt.Limit;
+
+  hal_load_gdt(Detail::kRegGdt);
+}
+
+Void IDTLoader::Load(Register64 &idt) {
+  volatile ::HCore::UIntPtr **baseIdt = (volatile ::HCore::UIntPtr **)idt.Base;
+
+  MUST_PASS(baseIdt);
+
+  for (UInt16 i = 0; i < kKernelIdtSize; i++) {
+    MUST_PASS(baseIdt[i]);
+
+    Detail::kInterruptVectorTable[i].Selector = kGdtCodeSelector;
+    Detail::kInterruptVectorTable[i].Ist = 0x0;
+    Detail::kInterruptVectorTable[i].TypeAttributes = kInterruptGate;
+    Detail::kInterruptVectorTable[i].OffsetLow = ((UIntPtr)baseIdt[i] & 0xFFFF);
+    Detail::kInterruptVectorTable[i].OffsetMid = (((UIntPtr)baseIdt[i] >> 16) & 0xFFFF);
+    Detail::kInterruptVectorTable[i].OffsetHigh =
+        (((UIntPtr)baseIdt[i] >> 32) & 0xFFFFFFFF);
+    Detail::kInterruptVectorTable[i].Zero = 0x0;
+  }
+
+  Detail::kRegIdt.Base = reinterpret_cast<UIntPtr>(Detail::kInterruptVectorTable);
+  Detail::kRegIdt.Limit = sizeof(::HCore::Detail::AMD64::InterruptDescriptorAMD64) *
+                  (kKernelIdtSize - 1);
+
+  hal_load_idt(Detail::kRegIdt);
+
+  Detail::RemapPIC();
 }
 
 void GDTLoader::Load(Ref<RegisterGDT> &gdt) { GDTLoader::Load(gdt.Leak()); }
-- 
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