80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
/*
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Copyright © Nigel Barink 2023
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*/
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extern "C"{
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#include "../lib/include/string.h"
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}
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#include "memory/memory.h"
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#include "memory/KernelHeap.h"
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#include "memory/gdt/gdtc.h"
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#include "memory/TaskStateSegment.h"
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#include "supervisorterminal/superVisorTerminal.h"
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#include "drivers/vga/VBE.h"
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#include "drivers/pci/pci.h"
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#include "drivers/pit/pit.h"
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#include "drivers/acpi/acpi.h"
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#include "drivers/ide/ide.h"
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#include "i386/processor.h"
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#include "terminal/kterm.h"
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#include "interrupts/idt.h"
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#include "serial.h"
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extern "C" void LoadGlobalDescriptorTable();
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extern "C" void jump_usermode();
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void set_protected_bit()
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{
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// Set the protected bit of control register 0
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// this will put the CPU into protected mode
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// NOTE: This should really be a assembly procedure
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// We cant directly write to control register 0
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// therefor we copy the value of control register 0 into eax
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// once we are done manipulating the value we write the value in
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// eax back to control register 0
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asm volatile("mov %cr0, %eax ");
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asm volatile("or $1, %eax");
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asm volatile("mov %eax, %cr0");
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}
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extern "C" void kernel ()
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{
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init_serial();
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kterm_init();
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setup_tss();
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initGDT();
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initidt();
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LoadGlobalDescriptorTable();
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flush_tss();
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printf("Memory setup complete!\n");
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// Enable interrupts
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asm volatile("STI");
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initHeap();
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pit_initialise();
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// ACPI::initialize();
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PCI::Scan();
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//TestIDEController();
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processor::initialize();
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printf("Enable Protected mode and jump to kernel main\n");
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set_protected_bit();
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#ifdef USERMODE_RELEASE
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// Lets jump into user mode
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jump_usermode();
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#else
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startSuperVisorTerminal();
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#endif
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} |