#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();

/*
void test_a20()
{
    uint16_t *test=0x7dfe;
    test+=1024*1024;
//    *test=0x69;
//    test=0x8abcd;
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"A20 test: 0x%02X ",*test);

}
*/
////////// KERNEL MAIN///// /////
// this is the very heart of our operating system!
void kernel_main(uint32_t initial_stack)
{

    // 
    // 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);

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

    // multiprocessing / apic stuff
    if(!find_mp())
	panic(FOOLOS_MODULE_NAME,"Can not Find _MP_");

    //  pic 
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"setup PIC");
    pic_setup();

    // PIT config (timer)
    timer_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);

    // 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
    // so clock = 32 (irq 0)
    // keyboard = 33 (irq 1)
    // floppy = 38 (irq 6)
    // etc..

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

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

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

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

    // pci
    pci_init();

    // floppy
    // floppy_init();

    //init shell
    shell_init();

    // multitasking
    task_init();

    while(1)
    {
	
    }

 
}