Nigel
520104a43a
- Updated gdt assembly - Updated Interrupt service request handlers - Improved virtual memory manager - NOTE: we're dependent on identity mappings for the heap to work
91 lines
1.7 KiB
C++
91 lines
1.7 KiB
C++
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extern "C"
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{
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#include "../lib/include/string.h"
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}
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#include "prekernel/bootstructure.h"
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#include "memory/memory.h"
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#include "memory/memoryinfo.h"
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#include "memory/memory.h"
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#include "memory/VirtualMemoryManager.h"
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#include "memory/KernelHeap.h"
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#include "memory/gdt/gdtc.h"
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#include "supervisorterminal/superVisorTerminal.h"
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#include "drivers/io/io.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 "terminal/kterm.h"
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#include "prekernel/multiboot.h"
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#include "bootinfo.h"
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#include "bootcheck.h"
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#include "interrupts/idt/idt.h"
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#include "time.h"
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#include "cpu.h"
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#include "serial.h"
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#include "time.h"
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#include "definitions.h"
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/*
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Copyright © Nigel Barink 2023
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*/
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extern "C" void kernel_main ()
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{
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/*
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* Show a little banner for cuteness
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*/
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printf("|=== BarinkOS ===|\n");
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startSuperVisorTerminal();
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}
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extern "C" void early_main()
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{
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init_serial();
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kterm_init();
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printf("Allocated blocks: 0x%x \n", GetUsedBlocks());
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initGDT();
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init_idt();
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// Enable interrupts
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asm volatile("STI");
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initHeap();
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printf("Enable Protected mode and jump to kernel main\n");
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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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pit_initialise();
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kernel_main();
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}
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