#define FOOLOS_MODULE_NAME "kernel"

#include "x86.h"
#include "../lib/logger/log.h"	// logger facilities

// TODO: WHHYY can i compile it without the includes!???

///////
// interrupt handler prototypes
// todo: move somewhere else!?
void int_clock_handler();
void int_kb_handler();
void int_floppy_handler();

uint32_t read_eip();


//
// KERNEL MAIN 
//
// this is the very heart of our operating system!
//

void kernel_main(uint32_t initial_stack, int mp)
{


    volatile static uint32_t cpu1_counter=0;

    // catch the APs (Application Processors)
    /*
    if(mp==1)
    {
	//while(1) { static uint16_t c=0; PutString("cpu2: %03d", 200,560,0b1111100000000000, (c++)/100); }
	while(1) { static uint16_t c=0; PutString("cpu1counter: %d", 200,560,0b1111100000000000, (cpu1_counter)); }
    }
    */


    // 
    // We want to get output to the screen as fast as possible!
    //
    // Our Fool-Boot-Loader did set up VESA already for us.
    // The desired VESA mode is hardcoded in [boot/mbr.asm].
    //
    // The [vesa_init(...)] function requires:
    //
    //	* the addresses of the vbeinfo struct
    //	* the address of the vbemodeinfo struct (for selected mode).
    //	* the address of our Fool-Font binary data.
    //
    //	The first two paramters are hardcoded in [boot/mbr.asm],
    //	while the last one is set in the Makefile. The font binary
    //	is integrated in the kernel image.
    //
    //  this function returns the physical base address of 
    //  our video memory 
    //

    uint32_t vesa_physbase=vesa_init(0x8300,0x8400,0x7200);


    //
    // Print initial address of the esp stack pointer
    //

    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"initial esp: 0x%08X",initial_stack);

    //
    // Initialize other processors
    //
    //	This currently uses the MP Floating Pointer Struct.
    //	Should support APCI in future too.
    //
    

    if(!init_mp()) panic(FOOLOS_MODULE_NAME,"Can not Find _MP_");


    //
    //	Memory Init
    //

    // we know that here, the bootloader placed the mamory map!
    mem_init(0x7c00+0x400,*((uint16_t *)(0x7c00+0x600)));

    
    // paging  (pass the vesa physbase address for identity mapping)
    vmem_init(vesa_physbase);

    while(1) { 
	PutString("cpu1counter: %d", 10,560,0b1111100000000000, (cpu1_counter));
	cpu1_counter++;
    }
    //
    //  Setup PIC
    //
    //  Do we nee this when using APIC?
    //

    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"setting up PIC.");
    pic_setup();

    //while(1);

    //
    // Configuring the PIT timer.
    //
    
    timer_init();


    //
    // Interrupts
    //

    // init and interrupt decriptor table 
    int_init(0x08);

    // set default interrupts
    int_install();

    // setup some custom interrupts
    // remember that we shifted all interrupts with the pic by 32

    // install PIT interrupt handler (irq 0 => 32)
    int_install_ir(32, 0b10001110, 0x08,&int_clock_handler);

    // install keyboard interrupt handler (irq 1 => 33)
    int_install_ir(33, 0b10001110, 0x08,&int_kb_handler);

    // install floppy interrupt handler (irq 6 => 38)
    int_install_ir(38, 0b10001110, 0x08,&int_floppy_handler);

    // now we can enable interrupts back again
//    int_enable();

    while(1) { 
	cpu1_counter++;
	/*
	static uint16_t c=0; 
	PutString("cpu1: A",20,560,0xffffff,0); 
	for(int c2=0;c2<0xffff;c2++);
	PutString("cpu1: B",20,560,0xffffff,0); 
	for(int c2=0;c2<0xffff;c2++);
	//PutString("cpu1: %03d", 20,560,0b1111100000000000, (c++)/100); 
	*/
    }

    //
    // Scan the PCI Bus
    // 
    // We are interested in the E1000 Network Adapter in particular
    // Its driver will be hopefully implemented one day ;)
    //

    pci_init();

    //
    // Initialize Floppy Disk
    //
    
    // floppy_init();


    // 
    // "Shell"
    //
    // Will process input from the keyboard but will be completely
    // redesigned soon.
    //
    
    shell_init();


    //
    // Initialize Multitasking
    //
    // For now this starts two tasks which are scheduled 
    // round robin style.
    //

    task_init();

    
    //
    // Just hang here. 
    //
   
    while(1);

 
}