kernel/init/init32b.asm

   1 ;----------------------------------------------------------;
   2 ; BOS kernel                Christoffer Bubach, 2003-2005. ;
   3 ;----------------------------------------------------------;
   4 ;                                                          ;
   5 ;     Initiation function for BOS                          ;
   6 ;                                                          ;
   7 ;----------------------------------------------------------;
   8
   9
  10 bos_init:
  11
  12     ;----------------------;
  13     ;  we are in pmode..   ;
  14     ;----------------------;
  15         mov    bx, 0x0193
  16         call   setcursor
  17         mov    esi, pmode_load
  18         mov    bl, 0x07
  19         call   print
  20
  21         mov    bx, 0x01C5
  22         call   setcursor
  23         mov    esi, pmode_load_ok
  24         mov    bl, 0x02
  25         call   print
  26
  27     ;----------------------;
  28     ;   kernel loaded..    ;
  29     ;----------------------;
  30         mov    bx, 0x01E3
  31         call   setcursor
  32         mov    esi, kernel_load
  33         mov    bl, 0x07
  34         call   print
  35
  36         mov    bx, 0x0215
  37         call   setcursor
  38         mov    esi, kernel_load_ok
  39         mov    bl, 0x02
  40         call   print
  41
  42     ;----------------;
  43     ;  remap PICs    ;
  44     ;----------------;
  45         mov    cl, 0x20                               ; PIC 1, irq0-irq7 -> int 0x20-27.
  46         mov    ch, 0x28                               ; PIC 2, irq8-irq15 -> int 0x28-30.
  47         call   remap_pics
  48         call   disable_irqs
  49
  50         mov    bx, 0x0233
  51         call   setcursor
  52         mov    esi, pic_irq
  53         mov    bl, 0x07
  54         call   print
  55
  56         mov    bx, 0x0265
  57         call   setcursor
  58         mov    esi, pic_irq_ok
  59         mov    bl, 0x02
  60         call   print
  61
  62     ;--------------;
  63     ;  setup IDT   ;
  64     ;--------------;
  65         mov    esi, u_isr                             ; isr.inc
  66         call   init_idt                               ; idt.inc
  67         mov    esi, idt_list                          ; idt.inc
  68         call   set_idt_list                           ; idt.inc
  69
  70         sti                                           ; Interrupts back.
  71
  72         mov    bx, 0x0283
  73         call   setcursor
  74         mov    esi, idt_mess
  75         mov    bl, 0x07
  76         call   print
  77
  78         mov    bx, 0x02B5
  79         call   setcursor
  80         mov    esi, idt_ok
  81         mov    bl, 0x02
  82         call   print
  83
  84
  85     ;---------------------------------------------;
  86     ;  enable IRQs (one after one as i code it)   ;
  87     ;---------------------------------------------;
  88         mov    cl, 1
  89         call   enable_irq                             ; Enable IRQ 1.
  90
  91         mov    bx, 0x02D3
  92         call   setcursor
  93         mov    esi, kbd_load
  94         mov    bl, 0x07
  95         call   print
  96
  97         mov    bx, 0x0305
  98         call   setcursor
  99         mov    esi, kbd_ok
 100         mov    bl, 0x02
 101         call   print
 102
 103     ;------------------------------------;
 104     ;  get CMOS data, set PIT to 100Hz   ;
 105     ;                 and start timer.   ;
 106     ;------------------------------------;
 107         call   get_cmos_data                          ; cmos.inc
 108         call   set_pit_freq                           ; timer.inc
 109         mov    cl, 0
 110         call   enable_irq                             ; Enable IRQ 0.
 111
 112     ;-------------------;
 113     ;  init simple MM   ;
 114     ;-------------------;
 115         mov    ebx, 0x100000                          ; address of first free
 116         mov    ecx, [ram_amount]                      ; RAM. everything before
 117         call   init_mem                               ; that is reserved.
 118
 119     ;--------------------;
 120     ;  init fdc driver   ;
 121     ;--------------------;
 122         call   fdc_init                               ; fdc.inc
 123
 124
 125     ;-------------------------;
 126     ;  return to kernel.asm   ;
 127     ;-------------------------;
 128         ret