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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <StorageKit/AHCI.h>
#include <ArchKit/ArchKit.h>
#include <KernelKit/UserProcessScheduler.h>
#include <KernelKit/HardwareThreadScheduler.h>
#include <KernelKit/CodeMgr.h>
#include <modules/ACPI/ACPIFactoryInterface.h>
#include <NetworkKit/IPC.h>
#include <CFKit/Property.h>
#include <modules/CoreGfx/TextMgr.h>
EXTERN_C NeOS::VoidPtr kInterruptVectorTable[];
EXTERN_C NeOS::VoidPtr mp_user_switch_proc;
EXTERN_C NeOS::Char mp_user_switch_proc_stack_begin[];
STATIC NeOS::Void hal_init_scheduler_team()
{
for (NeOS::SizeT i = 0U; i < NeOS::UserProcessScheduler::The().CurrentTeam().AsArray().Count(); ++i)
{
NeOS::UserProcessScheduler::The().CurrentTeam().AsArray()[i] = NeOS::UserProcess();
NeOS::UserProcessScheduler::The().CurrentTeam().AsArray()[i].Status = NeOS::ProcessStatusKind::kKilled;
}
}
STATIC NeOS::UInt64 hal_rdtsc_fn()
{
NeOS::UInt32 lo, hi;
__asm__ volatile("rdtsc"
: "=a"(lo), "=d"(hi));
return ((NeOS::UInt64)hi << 32) | lo;
}
STATIC NeOS::UInt64 kStartTim, kEndTim;
/// @brief Kernel init procedure.
EXTERN_C void hal_init_platform(
NeOS::HEL::BootInfoHeader* handover_hdr)
{
kStartTim = hal_rdtsc_fn();
kHandoverHeader = handover_hdr;
if (kHandoverHeader->f_Magic != kHandoverMagic &&
kHandoverHeader->f_Version != kHandoverVersion)
{
return;
}
hal_init_scheduler_team();
/************************************** */
/* INITIALIZE BIT MAP. */
/************************************** */
kKernelBitMpSize = kHandoverHeader->f_BitMapSize;
kKernelBitMpStart = reinterpret_cast<NeOS::VoidPtr>(
reinterpret_cast<NeOS::UIntPtr>(kHandoverHeader->f_BitMapStart));
/************************************** */
/* INITIALIZE GDT AND SEGMENTS. */
/************************************** */
STATIC CONST auto kGDTEntriesCount = 6;
/* GDT, mostly descriptors for user and kernel segments. */
STATIC NeOS::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
{.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
};
// Load memory descriptors.
NeOS::HAL::RegisterGDT gdt_reg;
gdt_reg.Base = reinterpret_cast<NeOS::UIntPtr>(kGDTArray);
gdt_reg.Limit = (sizeof(NeOS::HAL::Detail::NE_GDT_ENTRY) * kGDTEntriesCount) - 1;
FB::fb_clear_video();
//! GDT will load hal_read_init after it successfully loads the segments.
NeOS::HAL::GDTLoader gdt_loader;
gdt_loader.Load(gdt_reg);
NeOS::ke_panic(RUNTIME_CHECK_BOOTSTRAP);
}
EXTERN_C NeOS::Void hal_real_init(NeOS::Void) noexcept
{
NeOS::NeFS::fs_init_nefs();
NeOS::HAL::mp_get_cores(kHandoverHeader->f_HardwareTables.f_VendorPtr);
NeOS::HAL::Register64 idt_reg;
idt_reg.Base = (NeOS::UIntPtr)kInterruptVectorTable;
NeOS::HAL::IDTLoader idt_loader;
kEndTim = hal_rdtsc_fn();
kout << "Cycles Spent Before Userland: " << NeOS::number(kEndTim - kStartTim) << kendl;
idt_loader.Load(idt_reg);
while (YES)
{
continue;
}
}
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