{ ************************************************
  * Asuro
  * Unit: Kernel
  * Description: Main Entry Point for Asuro
  ************************************************
  * Author: K Morris
  * Contributors: A Hance
  ************************************************ }

unit kernel;
 
interface
 
uses
     multiboot,
     util,
     gdt,
     idt,
     isr,
     irq,
     isr32,
     console,
     bios_data_area,
     keyboard,
     mouse,
     vmemorymanager,
     pmemorymanager,
     lmemorymanager,
     tracer,
     drivermanagement,
     tss,
     scheduler,
     PCI,
     Terminal,
     strings,
     USB,
     testdriver,
     E1000,
     IDE,
     storagemanagement,
     lists,
     net;
 
procedure kmain(mbinfo: Pmultiboot_info_t; mbmagic: uint32); stdcall;
 
implementation

procedure temphook(ignored : TKeyInfo);
begin
   Terminal.run;
end;

procedure terminal_command_meminfo(params : PParamList);
begin
    push_trace('kernel.terminal_command_meminfo');

    console.writestring('Lower Memory = ');
    console.writeint(multibootinfo^.mem_lower);
    console.writestringln('KB');
    console.writestring('Higher Memory = ');
    console.writeint(multibootinfo^.mem_upper);
    console.writestringln('KB');
    console.writestring('Total Memory = ');
    console.writeint(((multibootinfo^.mem_upper + 1000) div 1024) + 1);
    console.writestringln('MB');

    pop_trace;
end;

procedure terminal_command_bsod(params : PParamList);
begin
    push_trace('kernel.terminal_command_bsod');

    if ParamCount(params) > 1 then begin
      bsod(getparam(0, params), getparam(1, params));
    end else begin
        console.writestringln('Invalid number of params.');
        console.writestringln('Usage: bsod <error> <info>');
    end;  

    pop_trace; 
end;

procedure kmain(mbinfo: Pmultiboot_info_t; mbmagic: uint32); stdcall; [public, alias: 'kmain'];   
var
   c               : uint8;
   z               : uint32;
   dds             : uint32;
   pint            : puint32;
   pint2           : puint32;
   keyboard_layout : array [0..1] of TKeyInfo;
   i               : uint32;
   cEIP            : uint32;
   temp            : uint32;
   atmp            : puint32;
   test            : puint8;

   
begin
     multibootinfo:= mbinfo;
     multibootmagic:= mbmagic;

     tracer.freeze();

     { Console Init }
     console.init();

     { Terminal Init }
     terminal.init();
     terminal.registerCommand('MEMINFO', @terminal_command_meminfo, 'Print Simple Memory Information.');
     terminal.registerCommand('BSOD', @terminal_command_bsod, 'Force a Panic Screen.');

     console.writestringln('Booting Asuro...');

     { Check for Multiboot }
     if (multibootmagic <> MULTIBOOT_BOOTLOADER_MAGIC) then begin
        console.setdefaultattribute(console.combinecolors(Red, Black));
        console.outputln('KERNEL', 'Multiboot Compliant Boot-Loader Needed!');
        console.outputln('KERNEL', 'HALTING.');
        BSOD('Multiboot Error', 'Multiboot Compliant Boot-Loader Needed!');
        util.halt_and_catch_fire;
     end;

     { GDT Init }
     gdt.init();
     asm
        MOV dds, CS
     end;
     if dds = $08 then begin
        console.outputln('KERNEL', 'GDT: LOAD SUCCESS.');
     end else begin
        console.outputln('KERNEL', 'GDT: LOAD FAIL.');
        console.outputln('KERNEL', 'HALTING.');
        BSOD('GDT', 'Failed to load the GDT correctly.');
     end;

     { Memory/CPU Init }
     idt.init();
     isr.init();
     irq.init();
     pmemorymanager.init();
     vmemorymanager.init();
     lmemorymanager.init();
     tss.init();
     scheduler.init();

     { Management Interfaces }
     tracer.init();
     drivermanagement.init();
     storagemanagement.init();

     { Hook Timer for Ticks }
     STI;
     isr32.hook(uint32(@bios_data_area.tick_update));

     { Device Drivers }
     console.outputln('KERNEL', 'DEVICE DRIVERS: INIT BEGIN.');
     keyboard.init(keyboard_layout);
     mouse.init();
     testdriver.init();
     E1000.init();
     IDE.init();
     console.outputln('KERNEL', 'DEVICE DRIVERS: INIT END.');

     { Bus Drivers }
     console.outputln('KERNEL', 'BUS DRIVERS: INIT BEGIN.');
     USB.init();
     pci.init();
     console.outputln('KERNEL', 'BUS DRIVERS: INIT END.');
     
     { Network Stack }
     net.init;

     { End of Boot }
     console.writestringln('');
     console.setdefaultattribute(console.combinecolors(Green, Black));
     console.writestringln('Asuro Booted Correctly!');
     console.setdefaultattribute(console.combinecolors(White, Black));
     console.writestringln('');
     console.writestringln('Press any key to boot in to Asuro Terminal...');

     keyboard.hook(@temphook);

     util.halt_and_dont_catch_fire;
end;
 
end.