kernel/krl_incs/bos_init.inc

   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     edi, 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