#include <string.h>
#include <system.h>
#include <conio.h>
//#include <hal.h>
//#include "hal/floppy/floppy.h"
#include "drivers/drivers.h"
#include <time.h>
#include <bootinfo.h>
#include "memory/mmngr_ph.h"
#include "memory/mmngr_vi.h"
#include "video/vga03h.h"

#include <stdlib.h>

// format of a memory region
typedef struct {
	unsigned	startLo;
	unsigned	startHi;
	unsigned	sizeLo;
	unsigned	sizeHi;
	unsigned	type;
	unsigned	acpi_3_0;
} memory_region ;

// different memory regions (in memory_region.type)
/*char* strMemoryTypes[] = {
      "",
	"Available",			//memory_region.type==0
      "Reserved",			//memory_region.type==1
	"ACPI Reclaim",		//memory_region.type==2
	"ACPI NVS Memory"		//memory_region.type==3
};*/

extern void _code, _data, _bss, _end;

void k_init(multiboot_info* bootinfo)
{
      memset(&_bss, 0, &_end - &_bss);                // zero the bss
      unsigned int i;

      // Start phyiscal memory manager
      unsigned memSize = bootinfo->Memory;
      
      memory_region* memMap = bootinfo->MemoryMapAddress;
      pmmngr_init (memSize, (unsigned)&_end);

      // Initialize graphics & HAL
      //graphics_init();
      DriversInstall();

      // Initialize memory
      for (i=0; (memMap[i].sizeHi != 0 || memMap[i].sizeLo != 0) && i<15; ++i) 
		if (memMap[i].type==1) 
                  pmmngr_init_region (memMap[i].startLo, memMap[i].sizeLo);
                  
      // Protect kernel, bios data area etc
      pmmngr_deinit_region (0x100000, 4096+(unsigned)((&_end) + (memSize / 4)*3) - 0xC0000000);
      pmmngr_deinit_region (0x0, 0x500);                    // IVT, Bios Data Area

      // Initialize virtual mem manager
      vmmngr_initialize();
}
      

extern void shell();
void k_main(unsigned kernel_size, multiboot_info* bootinfo)
{
    k_init(bootinfo);
    vga03h_install();

    shell();
    for(;;);
}