From 3e607e871b1b20e14527845a511ae2a6739fcaac Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal@el-mahrouss-logic.com>
Date: Sat, 9 Mar 2024 08:37:29 +0100
Subject: See below.

- HCoreKrnl:
	- Improve interrupt handler for AMD64 targets.
	- Wrapped AHCI and PE types into a namespace.
	- Replace L0 with the label MainLoop.
	- Reworked C++Kit and NetBoot modules.
	- Put INewFSIterator constructor as explicit.

Signed-off-by: Amlal El Mahrouss <amlal@el-mahrouss-logic.com>
---
 Private/HALKit/AMD64/HalDescriptorLoader.cpp      | 12 +++++-----
 Private/HALKit/AMD64/HalInterruptHandlerAMD64.cxx | 29 +++++++++++++----------
 Private/HALKit/AMD64/HalNewBoot.asm               |  2 +-
 Private/HALKit/AMD64/Processor.hpp                |  4 ++--
 4 files changed, 26 insertions(+), 21 deletions(-)

(limited to 'Private/HALKit')

diff --git a/Private/HALKit/AMD64/HalDescriptorLoader.cpp b/Private/HALKit/AMD64/HalDescriptorLoader.cpp
index a68fb54a..1dbe8e9e 100644
--- a/Private/HALKit/AMD64/HalDescriptorLoader.cpp
+++ b/Private/HALKit/AMD64/HalDescriptorLoader.cpp
@@ -25,11 +25,12 @@ STATIC ::HCore::Detail::AMD64::InterruptDescriptorAMD64
 
 void IDTLoader::Load(Register64 &idt) {
   volatile ::HCore::UIntPtr **baseIdt = (volatile ::HCore::UIntPtr **)idt.Base;
+  
   MUST_PASS(baseIdt);
-
-  MUST_PASS(baseIdt[0]);
-
+  
   for (UInt16 i = 0; i < kKernelIdtSize; i++) {
+    MUST_PASS(baseIdt[i]);
+
     kInterruptVectorTable[i].Selector = kGdtCodeSelector;
     kInterruptVectorTable[i].Ist = 0x0;
     kInterruptVectorTable[i].TypeAttributes = kInterruptGate;
@@ -40,10 +41,9 @@ void IDTLoader::Load(Register64 &idt) {
     kInterruptVectorTable[i].Zero = 0x0;
   }
 
-  kRegIdt.Base = (UIntPtr)kInterruptVectorTable;
+  kRegIdt.Base = reinterpret_cast<UIntPtr>(kInterruptVectorTable);
   kRegIdt.Limit = sizeof(::HCore::Detail::AMD64::InterruptDescriptorAMD64) *
-                      kKernelIdtSize -
-                  1;
+                  (kKernelIdtSize - 1);
 
   rt_load_idt(kRegIdt);
 
diff --git a/Private/HALKit/AMD64/HalInterruptHandlerAMD64.cxx b/Private/HALKit/AMD64/HalInterruptHandlerAMD64.cxx
index be0932bd..34cf049e 100644
--- a/Private/HALKit/AMD64/HalInterruptHandlerAMD64.cxx
+++ b/Private/HALKit/AMD64/HalInterruptHandlerAMD64.cxx
@@ -9,21 +9,26 @@
 
 #include <ArchKit/ArchKit.hpp>
 
-/// @brief Interrupt handler 21h, 10h 
-/// @param rsp stack pointer.
-
-#define kInterruptIdAlt 0x10
 #define kInterruptId    0x21
 
-EXTERN_C ATTRIBUTE(naked) HCore::UIntPtr rt_handle_interrupts(HCore::UIntPtr rsp)
+/// @brief Runtime interrupt handler
+/// @param sf The stack frame pushed by the isr.
+/// @return the stackframe pointer.
+EXTERN_C ATTRIBUTE(naked) HCore::UIntPtr rt_handle_interrupts(HCore::UIntPtr sf)
 {
-    HCore::HAL::StackFramePtr stackPtr = reinterpret_cast<HCore::HAL::StackFramePtr>(rsp);
-
-    if (stackPtr->IntNum == kInterruptId ||
-        stackPtr->IntNum == kInterruptIdAlt) {
-        /// Do system call TODO
-        
+    volatile HCore::HAL::StackFramePtr stackPtr = reinterpret_cast<volatile HCore::HAL::StackFramePtr>(sf);
+    MUST_PASS(stackPtr);
+
+    switch (stackPtr->IntNum)
+    {
+    case kInterruptId:
+    {
+        /* TODO: HcOpenDevice and such syscalls. */
+        break;
+    }
+    default:
+        break;
     }
 
-    return rsp;
+    return sf;
 }
\ No newline at end of file
diff --git a/Private/HALKit/AMD64/HalNewBoot.asm b/Private/HALKit/AMD64/HalNewBoot.asm
index a18b6814..881c1728 100644
--- a/Private/HALKit/AMD64/HalNewBoot.asm
+++ b/Private/HALKit/AMD64/HalNewBoot.asm
@@ -34,7 +34,7 @@ Main:
     push rcx
     call RuntimeMain
     pop rcx
-L0:
+MainLoop:
     cli
     hlt
     jmp $
diff --git a/Private/HALKit/AMD64/Processor.hpp b/Private/HALKit/AMD64/Processor.hpp
index e5e35f20..c69e35d0 100644
--- a/Private/HALKit/AMD64/Processor.hpp
+++ b/Private/HALKit/AMD64/Processor.hpp
@@ -23,8 +23,8 @@
 
 #define kCPUBackendName "AMD64"
 
-#define IsActiveLow(flag) (flag & 2)
-#define IsLevelTriggered(flag) (flag & 8)
+#define IsActiveLow(FLG) (FLG & 2)
+#define IsLevelTriggered(FLG) (FLG & 8)
 
 #define kInterruptGate 0x8E
 #define kTrapGate 0xEF
-- 
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