#define FOOLOS_MODULE_NAME "kernel"

#ifdef __linux__
#error "Watchout! this is not Linux but FoolOS. Use a cross-compiler"
#endif

#include "kernel.h"

#include <stdint.h>
#include "config.h"
#include "types.h"
#include "lib/logger/log.h"

#include "timer.h"
#include "mem.h"
#include "vmem.h"
#include "mp.h"
#include "interrupts.h"
#include "multiboot.h"


#include <stddef.h> 

// for built-in shell
#include "task.h"
#include "multiboot.h"

#include "terminal/vt52.h"
#include "driver/console.h"

#include "fs/fifo.h"

// 
// The Foolish structure of Fool OS!
//
static fool_os foolos; 

fool_os *get_fool()
{
    return &foolos;
}
//
//
//



// stdio init : TODO: move away!
static vt52_tty tty1;

static void put_kb(uint8_t c)
{
    vt52_kb(&tty1,c);
}

static void stdin_put_char(uint8_t c)
{
    vt52_kb(&tty1,c);
}


static void init_stdio()
{
    fifo in=fifo_init(1);
    fifo out=fifo_init(1);

    //
    // Setup terminal output / input
    //
    term_out screen;
    screen.put_char=console_put_char;
    screen.update_cursor=update_cursor;

    term_in input;
    input.put_char=stdin_put_char;

    tty1=vt52_init(&screen,&input);

    keyboard_init(put_kb);
}




void kernel_main(uint32_t eax,uint32_t ebx)
{

    init_stdio();

    //
    // PR
    //
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%s - compiled on %s at %s",KERNEL_VERSION,__DATE__,__TIME__);


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

    //
    // GDT
    //
    gdt_setup();

    //
    // Setup Interrupts (code segment: 0x08)
    //
    int_init(0x08);


    // 
    // Process Multiboot Header
    //
    multiboot_information *info=get_multiboot(eax, ebx);


    //
    // Gather Info about other processors. (APs = application processors)
    // ACPI or MP
    //
    smp_processors procdata;    

    if(!acpi_find(&procdata))
	if(!mp_find(&procdata))
	    panic(FOOLOS_MODULE_NAME,"ACPI and MP search failed! I do not want to continue!");

    //
    //	Memory Init
    //
    //  after this is set up we will be able to allocate and deallocate 
    //  blocks of physical memory :)
    //
    uint32_t kernel_blocks=mem_init(info);

    //
    // Mount Root EXT2 ramimage (needs to be done before other processors started, because of /boot/mp.bin)
    // 
    fs_mount(info);

    // 
    // Start the other Processors (before paging because apic addr etc..?)
    //
    //TODO: !!! Check commented out sleep ()!!!
    smp_log_procdata(&procdata);
    smp_start_aps(&procdata,"/boot/mp.bin"); //will be copied over mbr



    //
    // Activate Virtual Memory (paging)
    //
    pdirectory *dir=vmem_init(kernel_blocks);

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


    //
    // Initialize Multitasking
    //
    task_init(dir); 


    //
    // Abvoe should never returon
    //
    panic(FOOLOS_MODULE_NAME,"reached end of kernel.c !!");
 
}