Nigel
01fcb0aa15
* Moved tests to a different folder * Adjusted the memory map address locations * Improved readability of `kernel.cpp`
108 lines
2.2 KiB
C++
108 lines
2.2 KiB
C++
#include "lib/string.h"
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#include "definitions.h"
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#include "prekernel/bootstructure.h"
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#include "drivers/vga/VBE.h"
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#include "drivers/pit/pit.h"
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#include "memory/PhysicalMemoryManager.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 "interrupts/idt/idt.h"
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#include "io.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 "terminal/kterm.h"
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#include "supervisorterminal/superVisorTerminal.h"
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extern "C" void kernel_main ();
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void ProcessBootInfo();
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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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print_serial("Hello Higher half kernel!\n");
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kterm_init();
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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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ProcessBootInfo();
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initHeap();
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// test heap allocation
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/*
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struct KernelInfo {
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int bar;
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bool foo;
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};
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KernelInfo* MyInfo = (KernelInfo*) malloc(sizeof(KernelInfo));
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MyInfo->bar = 6;
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MyInfo->foo = false;
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free(MyInfo);
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*/
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printf("Enable Protected mode and jump to kernel main\n");
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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"); // re-enable protected mode ?
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pit_initialise();
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kernel_main();
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}
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void ProcessBootInfo(){
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uint32_t BootInfoStruct = BootInfoBlock_pptr + 0xC0000000;
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BootInfoBlock* BootInfo = (BootInfoBlock*) ( BootInfoBlock_pptr + 0xC0000000 );
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if( BootInfo->ValidELFHeader )
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{
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// NOTE: Do something with it.. (Store it , process it etc...)
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}
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if(BootInfo->EnabledVBE)
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{
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// NOTE: Do something with it.. (Store it , process it etc...)
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}
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if(BootInfo->ValidSymbolTable)
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{
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// NOTE: Do something with it.. (Store it , process it etc...)
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// printf("- Valid Symbol Table available at 0x%x.\n Tab Size: %d, str Size: %d\n", BootInfo->SymbolTableAddr, BootInfo->SymbolTabSize, BootInfo->SymbolStrSize);
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}
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if(BootInfo->PhysicalMemoryMapAvailable)
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{
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SetupPhysicalMemoryManager(BootInfo);
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}
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}
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