ADD: Fix kernel build and bootloader build on aarch64, add syschk for

aarch64.
WIP: aarch64 on CoreBoot (EFI is unpractical)

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>

12 files changed, 242 insertions, 167 deletions

diff --git a/dev/Kernel/HALKit/AMD64/HalCoreScheduler.cc b/dev/Kernel/HALKit/AMD64/HalApplicationProcessor.cc
index 5d314aa7..bd14253f 100644
--- a/dev/Kernel/HALKit/AMD64/HalCoreScheduler.cc
+++ b/dev/Kernel/HALKit/AMD64/HalApplicationProcessor.cc
@@ -13,13 +13,11 @@
 #include <KernelKit/Timer.h>
 #include <Mod/GfxMgr/TextMgr.h>
 #include <NewKit/KernelPanic.h>
-
-// Needed for SMP.
 #include <KernelKit/HardwareThreadScheduler.h>
 
 #define kApicSignature "APIC"
 
-#define kApicBaseAddress        (0xFEE00000)
+#define kApicBaseAddress (0xFEE00000)
 
 #define kAPIC_ICR_Low	  0x300
 #define kAPIC_ICR_High	  0x310
@@ -140,12 +138,12 @@ namespace Kernel::HAL
 		Kernel::ke_dma_write(targetAddress, kAPIC_ICR_Low, kAPIC_EIPI_Vector | vector);
 	}
 
-	STATIC struct PROCESS_CONTROL_BLOCK final
+	struct PROCESS_CONTROL_BLOCK final
 	{
 		HAL::StackFramePtr f_Frame;
-		UInt8*			   f_Stack;
-		VoidPtr			   f_Image;
-	} kProcessBlocks[kSchedProcessLimitPerTeam] = {0};
+	};
+
+	STATIC PROCESS_CONTROL_BLOCK kProcessBlocks[kSchedProcessLimitPerTeam] = {0};
 
 	EXTERN_C HAL::StackFramePtr mp_get_current_context(Int64 pid)
 	{
@@ -160,37 +158,6 @@ namespace Kernel::HAL
 		const auto process_index = pid % kSchedProcessLimitPerTeam;
 
 		kProcessBlocks[process_index].f_Frame = stack_frame;
-		kProcessBlocks[process_index].f_Stack = stack_ptr;
-		kProcessBlocks[process_index].f_Image = image;
-
-		if (!mp_is_smp())
-		{
-			ke_panic(RUNTIME_CHECK_PROCESS, "The Kernel does not support non-SMP profiles as of now. We are unable to process this context switch.");
-		}
-		else
-		{
-			for (SizeT smpi = 0UL; smpi < kSMPMax; ++smpi)
-			{
-				if (!kAPICAddresses[smpi].mUsed)
-				{
-					kAPICAddresses[smpi].mUsed = YES;
-
-					hal_send_start_ipi(kAPICLocales[smpi], ((UIntPtr)image) >> 12, kApicBaseAddress);
-
-					for (SizeT i = 0; i < 1000000; ++i)
-						;
-
-					hal_send_sipi(kAPICLocales[smpi], ((UIntPtr)image) >> 12, kApicBaseAddress);
-
-					for (SizeT i = 0; i < 1000000; ++i)
-						;
-
-					hal_send_sipi(kAPICLocales[smpi], ((UIntPtr)image) >> 12, kApicBaseAddress);
-
-					kAPICAddresses[smpi].mUsed = NO;
-				}
-			}
-		}
 
 		return YES;
 	}
diff --git a/dev/Kernel/HALKit/AMD64/HalKernelMain.cc b/dev/Kernel/HALKit/AMD64/HalKernelMain.cc
index 16571373..7b3e2345 100644
--- a/dev/Kernel/HALKit/AMD64/HalKernelMain.cc
+++ b/dev/Kernel/HALKit/AMD64/HalKernelMain.cc
@@ -93,27 +93,6 @@ EXTERN_C Kernel::Void hal_real_init(Kernel::Void) noexcept
 {
 	rtl_kernel_main(0, nullptr, nullptr, 0);
 
-	auto id = Kernel::rtl_create_process([] (const Kernel::SizeT argc, Kernel::Char** argv, Kernel::Char** envp, const Kernel::SizeT envp_len) -> void {
-		while (YES);
-	}, "SMP Process #1");
-
-	Kernel::UserProcessScheduler::The().CurrentTeam().mProcessList[id].PTime = 0;
-	Kernel::UserProcessScheduler::The().CurrentTeam().mProcessList[id].Status = Kernel::ProcessStatusKind::kRunning;
-
-	id = Kernel::rtl_create_process([] (const Kernel::SizeT argc, Kernel::Char** argv, Kernel::Char** envp, const Kernel::SizeT envp_len) -> void {
-		while (YES);
-	}, "SMP Process #2");
-
-	Kernel::UserProcessScheduler::The().CurrentTeam().mProcessList[id].PTime = 0;
-	Kernel::UserProcessScheduler::The().CurrentTeam().mProcessList[id].Status = Kernel::ProcessStatusKind::kRunning;
-
-	id = Kernel::rtl_create_process([] (const Kernel::SizeT argc, Kernel::Char** argv, Kernel::Char** envp, const Kernel::SizeT envp_len) -> void {
-		while (YES);
-	}, "SMP Process #3");
-
-	Kernel::UserProcessScheduler::The().CurrentTeam().mProcessList[id].PTime = 0;
-	Kernel::UserProcessScheduler::The().CurrentTeam().mProcessList[id].Status = Kernel::ProcessStatusKind::kRunning;
-
 	Kernel::HAL::mp_get_cores(kHandoverHeader->f_HardwareTables.f_VendorPtr);
 
 	Kernel::HAL::Register64 idt_reg;
diff --git a/dev/Kernel/HALKit/AMD64/Processor.h b/dev/Kernel/HALKit/AMD64/Processor.h
index 26256baf..def26fa9 100644
--- a/dev/Kernel/HALKit/AMD64/Processor.h
+++ b/dev/Kernel/HALKit/AMD64/Processor.h
@@ -177,10 +177,12 @@ namespace Kernel::HAL
 		static Void Load(Register64& idt);
 		static Void Load(Ref<Register64>& idt);
 	};
+	
 	/***********************************************************************************/
 	/// @brief Is the current config SMP aware?
 	/// @return True if YES, False if not.
 	/***********************************************************************************/
+
 	Bool mp_is_smp(Void) noexcept;
 
 	/***********************************************************************************/
@@ -192,6 +194,9 @@ namespace Kernel::HAL
 	/***********************************************************************************/
 
 	Void hal_send_start_ipi(UInt32 apicId, UInt8 vector, UInt32 targetAddress);
+
+	/***********************************************************************************/
+
 	Void hal_send_end_ipi(UInt32 apicId, UInt8 vector, UInt32 targetAddress);
 
 	/***********************************************************************************/
diff --git a/dev/Kernel/HALKit/ARM64/AP.h b/dev/Kernel/HALKit/ARM64/AP.h
deleted file mode 100644
index 8cebfeca..00000000
--- a/dev/Kernel/HALKit/ARM64/AP.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/* -------------------------------------------
-
-	Copyright (C) 2024, Theater Quality Corp, all rights reserved.
-
-	File: AP.h
-	Purpose: RISC-V hardware threads.
-
-	Revision History:
-
-	30/01/24: Added file (amlel)
-
-------------------------------------------- */
-
-#pragma once
-
-#include <NewKit/Defines.h>
-
-namespace Kernel
-{
-	typedef Int64 hal_ap_kind;
-
-	typedef struct HAL_HARDWARE_THREAD
-	{
-		Kernel::UIntPtr fStartAddress;
-		Kernel::UInt8	fPrivleged : 1;
-		Kernel::UInt32	fPageMemoryFlags;
-		hal_ap_kind		fIdentNumber;
-	} HAL_HARDWARE_THREAD;
-
-	/// @brief Set PC to specific hart.
-	/// @param hart the hart
-	/// @param epc the pc.
-	/// @return
-	EXTERN_C Kernel::Void hal_set_pc_to_hart(HAL_HARDWARE_THREAD* hart, Kernel::VoidPtr epc);
-
-} // namespace Kernel
diff --git a/dev/Kernel/HALKit/ARM64/ApplicationProcessor.h b/dev/Kernel/HALKit/ARM64/ApplicationProcessor.h
new file mode 100644
index 00000000..25d948d5
--- /dev/null
+++ b/dev/Kernel/HALKit/ARM64/ApplicationProcessor.h
@@ -0,0 +1,19 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024, Theater Quality Corp, all rights reserved.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <NewKit/Defines.h>
+#include <HALKit/ARM64/Processor.h>
+
+/************************************************** */
+/*     INITIALIZE THE GIC ON CPU.              */
+/************************************************** */
+
+namespace Kernel
+{
+	BOOL mp_initialize_gic(Kernel::Void);
+}
\ No newline at end of file
diff --git a/dev/Kernel/HALKit/ARM64/HalApplicationProcessor.cc b/dev/Kernel/HALKit/ARM64/HalApplicationProcessor.cc
index fa62cf20..91252455 100644
--- a/dev/Kernel/HALKit/ARM64/HalApplicationProcessor.cc
+++ b/dev/Kernel/HALKit/ARM64/HalApplicationProcessor.cc
@@ -6,35 +6,129 @@
 

 #include <HALKit/ARM64/Processor.h>

 #include <KernelKit/DebugOutput.h>

-#include <HALKit/ARM64/AP.h>

+#include <HALKit/ARM64/ApplicationProcessor.h>

+#include <KernelKit/UserProcessScheduler.h>

 

-using namespace Kernel;

+#define GICD_BASE 0x08000000 // Distributor base address

+#define GICC_BASE 0x08010000 // CPU interface base address

 

-namespace Kernel::Detail

+#define GICD_CTLR		0x000 // Distributor Control Register

+#define GICD_ISENABLER	0x100 // Interrupt Set-Enable Registers

+#define GICD_ICENABLER	0x180 // Interrupt Clear-Enable Registers

+#define GICD_ISPENDR	0x200 // Interrupt Set-Pending Registers

+#define GICD_ICPENDR	0x280 // Interrupt Clear-Pending Registers

+#define GICD_IPRIORITYR 0x400 // Interrupt Priority Registers

+#define GICD_ITARGETSR	0x800 // Interrupt Processor Targets Registers

+#define GICD_ICFGR		0xC00 // Interrupt Configuration Registers

+

+#define GICC_CTLR 0x000 // CPU Interface Control Register

+#define GICC_PMR  0x004 // Interrupt Priority Mask Register

+#define GICC_IAR  0x00C // Interrupt Acknowledge Register

+#define GICC_EOIR 0x010 // End of Interrupt Register

+

+// ================================================================= //

+

+namespace Kernel

 {

-	STATIC void mp_hang_fn(void)

+	struct PROCESS_CONTROL_BLOCK final

+	{

+		HAL::StackFramePtr f_Frame;

+	};

+

+	STATIC PROCESS_CONTROL_BLOCK kProcessBlocks[kSchedProcessLimitPerTeam] = {0};

+

+	namespace Detail

+	{

+		STATIC BOOL kGICEnabled = NO;

+

+		STATIC void mp_hang_fn(void)

+		{

+			while (YES)

+				;

+		}

+

+		Void mp_setup_gic_el0(Void)

+		{

+			// enable distributor.

+			HAL::hal_mmio_write(GICD_BASE + GICD_CTLR, 0x1);

+

+			UInt32 gicc_ctlr = HAL::hal_mmio_read<UInt32>(GICC_BASE + GICC_CTLR);

+

+			gicc_ctlr |= 0x1;	   // Enable signaling of interrupts

+			gicc_ctlr |= (1 << 1); // Allow Group 1 interrupts in EL0

+

+			HAL::hal_mmio_write(GICC_BASE + GICC_CTLR, gicc_ctlr);

+

+			// Set priority mask (accept all priorities)

+			HAL::hal_mmio_write(GICC_BASE + GICC_PMR, 0xFF);

+

+			UInt32 icfgr = HAL::hal_mmio_read<UInt32>(GICD_BASE + GICD_ICFGR + (32 / 16) * 4);

+

+			icfgr |= (0x2 << ((32 % 16) * 2)); // Edge-triggered

+			HAL::hal_mmio_write(GICD_BASE + GICD_ICFGR + (32 / 16) * 4, icfgr);

+

+			// Target interrupt 32 to CPU 1

+			HAL::hal_mmio_write(GICD_BASE + GICD_ITARGETSR + (32 / 4) * 4, 0x2 << ((32 % 4) * 8));

+

+			// Set interrupt 32 priority to lowest (0xFF)

+			HAL::hal_mmio_write(GICD_BASE + GICD_IPRIORITYR + (32 / 4) * 4, 0xFF << ((32 % 4) * 8));

+

+			// Enable interrupt 32 for AP.

+			HAL::hal_mmio_write(GICD_BASE + GICD_ISENABLER + (32 / 32) * 4, 0x01 << (32 % 32));

+

+			kcout << "AP's GIC configured for interrupt 32." << endl;

+		}

+

+		BOOL mp_handle_gic_interrupt_el0(Void)

+		{

+			// Read the interrupt ID

+			UInt32 interrupt_id = HAL::hal_mmio_read<UInt32>(GICC_BASE + GICC_IAR);

+

+			// Check if it's a valid interrupt (not spurious)

+			if ((interrupt_id & 0x3FF) < 1020)

+			{

+				kcout << "Handling interrupt for AP: " << (interrupt_id & 0x3FF) << endl;

+

+				// TODO: Handle code here.

+

+				// End the interrupt

+

+				HAL::hal_mmio_write(GICC_BASE + GICC_EOIR, interrupt_id);

+

+				return YES;

+			}

+

+			// spurious interrupt

+			return NO;

+		}

+	} // namespace Detail

+

+	EXTERN_C HAL::StackFramePtr mp_get_current_context(ProcessID pid)

 	{

-		while (YES)

-			;

+		return kProcessBlocks[pid % kSchedProcessLimitPerTeam].f_Frame;

 	}

-} // namespace Kernel::Detail

 

-/// @brief wakes up thread from it's hang state.

-/// wakes up thread from hang.

-Void mp_wakeup_thread(HAL::StackFramePtr stack)

-{

-	if (!stack)

-		return;

+	EXTERN_C Bool mp_register_process(VoidPtr image, UInt8* stack_ptr, HAL::StackFramePtr stack_frame, ProcessID pid)

+	{

+		MUST_PASS(image && stack_ptr && stack_frame);

 

-	hal_set_pc_to_hart(reinterpret_cast<HAL_HARDWARE_THREAD*>(stack->R15), reinterpret_cast<VoidPtr>(stack->BP));

-}

+		const auto process_index = pid % kSchedProcessLimitPerTeam;

 

-/// @brief makes thread go to hang state.

-/// hooks and hangs thread to prevent code from executing.

-Void mp_hang_thread(HAL::StackFramePtr stack)

-{

-	if (!stack)

-		return;

+		kProcessBlocks[process_index].f_Frame = stack_frame;

+

+		return YES;

+	}

 

-	hal_set_pc_to_hart(reinterpret_cast<HAL_HARDWARE_THREAD*>(stack->R15), reinterpret_cast<VoidPtr>(Kernel::Detail::mp_hang_fn));

-}

+	BOOL mp_initialize_gic(Void)

+	{

+		if (!Detail::kGICEnabled)

+		{

+			Detail::kGICEnabled = YES;

+			Detail::mp_setup_gic_el0();

+

+			return YES;

+		}

+

+		return NO;

+	}

+} // namespace Kernel
\ No newline at end of file
diff --git a/dev/Kernel/HALKit/ARM64/HalCoreMPScheduler.cc b/dev/Kernel/HALKit/ARM64/HalCoreMPScheduler.cc
deleted file mode 100644
index fe055db8..00000000
--- a/dev/Kernel/HALKit/ARM64/HalCoreMPScheduler.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-/* -------------------------------------------
-
-	Copyright (C) 2024, Theater Quality Corp, all rights reserved.
-
-------------------------------------------- */
-
-#include <Mod/ACPI/ACPIFactoryInterface.h>
-#include <KernelKit/UserProcessScheduler.h>
-
-using namespace Kernel;
-
-STATIC struct PROCESS_CONTROL_BLOCK final
-{
-	HAL::StackFramePtr f_Frame;
-	UInt8*			   f_Stack;
-	VoidPtr			   f_Image;
-} kProcessBlocks[kSchedProcessLimitPerTeam] = {0};
-
-EXTERN_C HAL::StackFramePtr mp_get_current_context(ProcessID pid)
-{
-	return kProcessBlocks[pid % kSchedProcessLimitPerTeam].f_Frame;
-}
-
-EXTERN_C Bool mp_register_process(VoidPtr image, UInt8* stack_ptr, HAL::StackFramePtr stack_frame, ProcessID pid)
-{
-	MUST_PASS(image && stack_ptr && stack_frame);
-	return No;
-}
diff --git a/dev/Kernel/HALKit/ARM64/HalKernelMain.cc b/dev/Kernel/HALKit/ARM64/HalKernelMain.cc
index 692c6be2..1869d97b 100644
--- a/dev/Kernel/HALKit/ARM64/HalKernelMain.cc
+++ b/dev/Kernel/HALKit/ARM64/HalKernelMain.cc
@@ -4,6 +4,7 @@
 
 ------------------------------------------- */
 
+#include "HALKit/ARM64/ApplicationProcessor.h"
 #include <ArchKit/ArchKit.h>
 #include <Mod/GfxMgr/FBMgr.h>
 #include <FirmwareKit/Handover.h>
@@ -15,10 +16,9 @@
 #include <KernelKit/CodeMgr.h>
 #include <Mod/ACPI/ACPIFactoryInterface.h>
 #include <NetworkKit/IPC.h>
+#include <HALKit/ARM64/Processor.h>
 #include <CFKit/Property.h>
 
-Kernel::Void hal_real_init(Kernel::Void) noexcept;
-EXTERN_C Kernel::Void rtl_kernel_main(Kernel::SizeT argc, char** argv, char** envp, Kernel::SizeT envp_len);
 
 EXTERN_C void hal_init_platform(
 	Kernel::HEL::BootInfoHeader* handover_hdr)
@@ -46,7 +46,7 @@ EXTERN_C void hal_init_platform(
 
 	/// @note do initialize the interrupts after it.
 
-	rtl_kernel_main(0, nullptr, nullptr, 0);
+	Kernel::mp_initialize_gic();
 
 	while (YES)
 	{
diff --git a/dev/Kernel/HALKit/ARM64/HalKernelPanic.cc b/dev/Kernel/HALKit/ARM64/HalKernelPanic.cc
new file mode 100644
index 00000000..4cd61aff
--- /dev/null
+++ b/dev/Kernel/HALKit/ARM64/HalKernelPanic.cc
@@ -0,0 +1,80 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024, Theater Quality Corp, all rights reserved.
+
+------------------------------------------- */
+
+#include <NewKit/KernelPanic.h>
+#include <ArchKit/ArchKit.h>
+#include <KernelKit/Timer.h>
+#include <KernelKit/DebugOutput.h>
+#include <NewKit/KString.h>
+#include <FirmwareKit/Handover.h>
+#include <KernelKit/FileMgr.h>
+#include <Mod/GfxMgr/FBMgr.h>
+#include <Mod/GfxMgr/TextMgr.h>
+#include <NewKit/Utils.h>
+
+/* Each error code is attributed with an ID, which will prompt a string onto the
+ * screen. Wait for debugger... */
+
+namespace Kernel
+{
+	/// @brief Dumping factory class.
+	class RecoveryFactory final
+	{
+	public:
+		STATIC Void Recover() noexcept;
+	};
+
+	/***********************************************************************************/
+	/// @brief Stops execution of the kernel.
+	/// @param id kernel stop ID.
+	/***********************************************************************************/
+	Void ke_panic(const Kernel::Int32& id, const Char* message)
+	{
+		fb_init();
+
+		auto panic_text = RGB(0xff, 0xff, 0xff);
+
+		auto y = 10;
+		auto x = 10;
+
+		Char* message_apicid = new Char[128];
+		rt_set_memory(message_apicid, 0, 128);
+
+		rt_copy_memory((VoidPtr) "panic id: ", message_apicid, rt_string_len("panic id: "));
+		rt_to_string(message_apicid + rt_string_len("panic id: "), (UIntPtr)id, 10);
+
+		fb_render_string(message_apicid, y, x, panic_text);
+
+		y += 10;
+
+		fb_render_string((message ? message : "message: panic raised, going nowhere after this!"), y, x, panic_text);
+
+		y += 10;
+
+		fb_clear();
+
+		RecoveryFactory::Recover();
+	}
+
+	Void RecoveryFactory::Recover() noexcept
+	{
+		while (YES)
+		{
+			HAL::rt_halt();
+		}
+	}
+
+	void ke_runtime_check(bool expr, const Char* file, const Char* line)
+	{
+		if (!expr)
+		{
+			kcout << "FAILED: FILE: " << file << endl;
+			kcout << "FAILED: LINE: " << line << endl;
+
+			ke_panic(RUNTIME_CHECK_FAILED, file); // Runtime Check failed
+		}
+	}
+} // namespace Kernel
diff --git a/dev/Kernel/HALKit/ARM64/HalSchedulerCoreARM64.cc b/dev/Kernel/HALKit/ARM64/HalSchedulerCoreARM64.cc
index b015f001..e0a21c2f 100644
--- a/dev/Kernel/HALKit/ARM64/HalSchedulerCoreARM64.cc
+++ b/dev/Kernel/HALKit/ARM64/HalSchedulerCoreARM64.cc
@@ -8,22 +8,6 @@
 
 namespace Kernel
 {
-	EXTERN_C Void __zka_pure_call(void)
-	{
-		UserProcessScheduler::The().GetCurrentProcess().Leak().Crash();
-	}
-
-	bool hal_check_stack(HAL::StackFramePtr stackPtr)
-	{
-		if (!stackPtr)
-			return No;
-
-		if (stackPtr->BP == 0 || stackPtr->SP == 0)
-			return No;
-
-		return Yes;
-	}
-
 	/// @brief Wakes up thread.
 	/// Wakes up thread from the hang state.
 	Void mp_wakeup_thread(HAL::StackFrame* stack)
diff --git a/dev/Kernel/HALKit/ARM64/HalSchedulerCore.cc b/dev/Kernel/HALKit/ARM64/HalSchedulerCorePrimitivesARM64.cc
index c6585cb8..941fdf7a 100644
--- a/dev/Kernel/HALKit/ARM64/HalSchedulerCore.cc
+++ b/dev/Kernel/HALKit/ARM64/HalSchedulerCorePrimitivesARM64.cc
@@ -4,7 +4,7 @@
 

 ------------------------------------------- */

 

-#include <HALKit/AMD64/Processor.h>

+#include <HALKit/ARM64/Processor.h>

 #include <KernelKit/UserProcessScheduler.h>

 

 namespace Kernel

diff --git a/dev/Kernel/HALKit/ARM64/Processor.h b/dev/Kernel/HALKit/ARM64/Processor.h
index 422fafe1..bdf3272a 100644
--- a/dev/Kernel/HALKit/ARM64/Processor.h
+++ b/dev/Kernel/HALKit/ARM64/Processor.h
@@ -58,13 +58,24 @@ namespace Kernel::HAL
 
 	typedef StackFrame* StackFramePtr;
 
-	inline Void rt_halt()
+	inline Void rt_halt() noexcept
 	{
 		while (Yes)
 		{
 		}
 	}
 
+	template <typename DataKind>
+	inline void hal_mmio_write(UIntPtr address, DataKind value)
+	{
+		*reinterpret_cast<volatile DataKind*>(address) = value;
+	}
+
+	template <typename DataKind>
+	inline DataKind hal_mmio_read(UIntPtr address)
+	{
+		return *reinterpret_cast<volatile DataKind*>(address);
+	}
 } // namespace Kernel::HAL
 
 inline Kernel::VoidPtr kKernelBitMpStart = nullptr;