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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 7129 | dunkaist | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 2 | ;; ;; |
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| 3 | ;; 16 BIT ENTRY FROM BOOTSECTOR ;; |
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| 4 | ;; ;; |
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| 5 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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| 6 | |||
| 7 | include 'macros.inc' |
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| 8 | include 'struct.inc' |
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| 7140 | clevermous | 9 | include 'lang.inc' |
| 7129 | dunkaist | 10 | include 'encoding.inc' |
| 11 | include 'const.inc' |
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| 12 | |||
| 13 | os_code = code_l - tmp_gdt |
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| 9249 | Boppan | 14 | if defined pretest_build |
| 15 | PREBOOT_TIMEOUT = 0 ; seconds |
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| 16 | else |
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| 17 | PREBOOT_TIMEOUT = 5 |
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| 18 | end if |
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| 7129 | dunkaist | 19 | |
| 20 | use16 |
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| 21 | org 0x0 |
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| 22 | jmp start_of_code |
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| 23 | |||
| 24 | if lang eq sp |
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| 25 | include "kernelsp.inc" ; spanish kernel messages |
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| 26 | else if lang eq et |
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| 27 | version db 'Kolibri OS versioon 0.7.7.0+ ',13,10,13,10,0 |
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| 28 | else |
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| 29 | version db 'Kolibri OS version 0.7.7.0+ ',13,10,13,10,0 |
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| 30 | end if |
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| 31 | |||
| 32 | include "boot/bootstr.inc" ; language-independent boot messages |
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| 33 | include "boot/preboot.inc" |
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| 34 | |||
| 35 | if lang eq ge |
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| 36 | include "boot/bootge.inc" ; german system boot messages |
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| 37 | else if lang eq sp |
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| 38 | include "boot/bootsp.inc" ; spanish system boot messages |
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| 39 | else if lang eq ru |
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| 40 | include "boot/bootru.inc" ; russian system boot messages |
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| 41 | include "boot/ru.inc" ; Russian font |
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| 42 | else if lang eq et |
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| 43 | include "boot/bootet.inc" ; estonian system boot messages |
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| 44 | include "boot/et.inc" ; Estonian font |
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| 45 | else |
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| 46 | include "boot/booten.inc" ; english system boot messages |
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| 47 | end if |
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| 48 | |||
| 49 | include "boot/bootcode.inc" ; 16 bit system boot code |
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| 50 | include "bus/pci/pci16.inc" |
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| 51 | include "detect/biosdisk.inc" |
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| 52 | |||
| 53 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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| 54 | ;; ;; |
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| 55 | ;; SWITCH TO 32 BIT PROTECTED MODE ;; |
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| 56 | ;; ;; |
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| 57 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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| 58 | |||
| 59 | |||
| 60 | ; CR0 Flags - Protected mode and Paging |
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| 61 | |||
| 62 | mov ecx, CR0_PE+CR0_AM |
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| 63 | |||
| 64 | ; Enabling 32 bit protected mode |
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| 65 | |||
| 66 | sidt [cs:old_ints_h] |
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| 67 | |||
| 68 | cli ; disable all irqs |
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| 69 | cld |
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| 70 | mov al, 255 ; mask all irqs |
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| 71 | out 0xa1, al |
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| 72 | out 0x21, al |
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| 73 | l.5: |
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| 74 | in al, 0x64 ; Enable A20 |
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| 75 | test al, 2 |
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| 76 | jnz l.5 |
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| 77 | mov al, 0xD1 |
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| 78 | out 0x64, al |
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| 79 | l.6: |
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| 80 | in al, 0x64 |
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| 81 | test al, 2 |
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| 82 | jnz l.6 |
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| 83 | mov al, 0xDF |
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| 84 | out 0x60, al |
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| 85 | l.7: |
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| 86 | in al, 0x64 |
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| 87 | test al, 2 |
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| 88 | jnz l.7 |
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| 89 | mov al, 0xFF |
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| 90 | out 0x64, al |
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| 91 | |||
| 92 | lgdt [cs:tmp_gdt] ; Load GDT |
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| 93 | mov eax, cr0 ; protected mode |
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| 94 | or eax, ecx |
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| 95 | and eax, 10011111b *65536*256 + 0xffffff ; caching enabled |
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| 96 | mov cr0, eax |
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| 97 | jmp pword os_code:B32 ; jmp to enable 32 bit mode |
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| 98 | |||
| 99 | align 8 |
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| 100 | tmp_gdt: |
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| 101 | |||
| 102 | dw 23 |
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| 103 | dd tmp_gdt+0x10000 |
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| 104 | dw 0 |
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| 105 | code_l: |
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| 106 | dw 0xffff |
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| 107 | dw 0x0000 |
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| 108 | db 0x00 |
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| 109 | dw 11011111b *256 +10011010b |
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| 110 | db 0x00 |
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| 111 | |||
| 112 | dw 0xffff |
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| 113 | dw 0x0000 |
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| 114 | db 0x00 |
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| 115 | dw 11011111b *256 +10010010b |
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| 116 | db 0x00 |
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| 117 | |||
| 118 | include "data16.inc" |
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| 119 | |||
| 120 | if ~ lang eq sp |
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| 121 | diff16 "end of bootcode",0,$+0x10000 |
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| 122 | end if |
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| 123 | |||
| 124 | use32 |
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| 125 | org $+0x10000 |
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| 126 | |||
| 127 | align 4 |
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| 128 | B32: |