From dd7b72379108c10cd68853d2a8a0332784ebb8cb Mon Sep 17 00:00:00 2001
From: Amlal EL Mahrouss <amlal@softwarelabs.com>
Date: Fri, 14 Jun 2024 09:58:11 +0200
Subject: Kernel: Scheduler: ProcessHeader::New: do not get the pointer before
 allocating it!

Kernel: HAL: AMD64: Two things.

- Switching to an ARM HAL for our Zeta platform.
- Fix return register when sending acknowledge on APIC, which was using
  the 32-bit eax instead of rax.

Kernel: Boot: Update uname for Windows.

Kernel: GDT: move as global (HalKenelMain.cxx)

Signed-off-by: Amlal EL Mahrouss <amlal@softwarelabs.com>
---
 Kernel/HALKit/AMD64/HalInterruptAPI.asm |  4 ++--
 Kernel/HALKit/AMD64/HalKernelMain.cxx   | 37 +++++++++++++++------------------
 2 files changed, 19 insertions(+), 22 deletions(-)

(limited to 'Kernel/HALKit')

diff --git a/Kernel/HALKit/AMD64/HalInterruptAPI.asm b/Kernel/HALKit/AMD64/HalInterruptAPI.asm
index 150cfc10..4832ecf3 100644
--- a/Kernel/HALKit/AMD64/HalInterruptAPI.asm
+++ b/Kernel/HALKit/AMD64/HalInterruptAPI.asm
@@ -157,10 +157,10 @@ __NEW_INT_32:
     pop rcx
     pop rax
 
-    mov eax, 0
+    mov rax, 0
 
     ;; tell there local apic that we're done.
-    mov dword [0xFEE00000 + 0xB0], eax ; LAPIC_EOI
+    mov [0xFEE00000 + 0xB0], rax ; LAPIC_EOI
 
     iretq
 
diff --git a/Kernel/HALKit/AMD64/HalKernelMain.cxx b/Kernel/HALKit/AMD64/HalKernelMain.cxx
index 9b605e1a..cafa6388 100644
--- a/Kernel/HALKit/AMD64/HalKernelMain.cxx
+++ b/Kernel/HALKit/AMD64/HalKernelMain.cxx
@@ -28,9 +28,21 @@ namespace NewOS::HAL
 	extern void hal_system_get_cores(NewOS::voidPtr rsdPtr);
 } // namespace NewOS::HAL
 
+/* GDT constant. */
+STATIC NewOS::HAL::Detail::NewOSGDT cGdt = {
+	{0, 0, 0, 0x00, 0x00, 0}, // null entry
+	{0, 0, 0, 0x9a, 0xaf, 0}, // kernel code
+	{0, 0, 0, 0x92, 0xaf, 0}, // kernel data
+	{0, 0, 0, 0x00, 0x00, 0}, // null entry
+	{0, 0, 0, 0x9a, 0xaf, 0}, // user code
+	{0, 0, 0, 0x92, 0xaf, 0}, // user data
+};
+
 EXTERN_C void hal_init_platform(
 	NewOS::HEL::HandoverInformationHeader* HandoverHeader)
 {
+	/* Setup globals. */
+	
 	kHandoverHeader = HandoverHeader;
 
 	if (kHandoverHeader->f_Magic != kHandoverMagic &&
@@ -39,29 +51,17 @@ EXTERN_C void hal_init_platform(
 		return;
 	}
 
-	/// Setup kernel globals.
 	kKernelVirtualSize	= HandoverHeader->f_VirtualSize;
 	kKernelVirtualStart = reinterpret_cast<NewOS::VoidPtr>(
 		reinterpret_cast<NewOS::UIntPtr>(HandoverHeader->f_VirtualStart) + kVirtualAddressStartOffset);
 
 	kKernelPhysicalStart = HandoverHeader->f_PhysicalStart;
 
-	STATIC NewOS::HAL::Detail::NewOSGDT GDT = {
-		{0, 0, 0, 0x00, 0x00, 0}, // null entry
-		{0, 0, 0, 0x9a, 0xaf, 0}, // kernel code
-		{0, 0, 0, 0x92, 0xaf, 0}, // kernel data
-		{0, 0, 0, 0x00, 0x00, 0}, // null entry
-		{0, 0, 0, 0x9a, 0xaf, 0}, // user code
-		{0, 0, 0, 0x92, 0xaf, 0}, // user data
-	};
-
 	NewOS::HAL::RegisterGDT gdtBase;
 
-	gdtBase.Base  = reinterpret_cast<NewOS::UIntPtr>(&GDT);
+	gdtBase.Base  = reinterpret_cast<NewOS::UIntPtr>(&cGdt);
 	gdtBase.Limit = sizeof(NewOS::HAL::Detail::NewOSGDT) - 1;
 
-	/// Load GDT.
-
 	NewOS::HAL::GDTLoader gdt;
 	gdt.Load(gdtBase);
 
@@ -74,7 +74,7 @@ EXTERN_C void hal_init_platform(
 	NewOS::HAL::IDTLoader idt;
 	idt.Load(idtBase);
 
-	/// START POST
+	/* install basic hooks. */
 
 	constexpr auto cDummyInterrupt = 0x10; // 16
 
@@ -87,12 +87,9 @@ EXTERN_C void hal_init_platform(
 
 	NewOS::HAL::Detail::_ke_power_on_self_test();
 
-	auto cLoaderName = "LaunchDevil";
-	NewOS::execute_from_image(KeMain, cLoaderName);
+	/* Call generic kernel entrypoint. */
 
-	NewOS::HAL::hal_system_get_cores(kHandoverHeader->f_HardwareTables.f_RsdPtr);
+	KeMain();
 
-	while (true)
-	{
-	}
+	NewOS::ke_stop(RUNTIME_CHECK_BOOTSTRAP);
 }
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