forked from KolibriOS/kolibrios
91 lines
2.1 KiB
PHP
91 lines
2.1 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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align 4
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pic_delay:
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jmp pdl1
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pdl1: ret
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align 4
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rerouteirqs:
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cli
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mov al,0x11 ; icw4, edge triggered
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out 0x20,al
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call pic_delay
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out 0xA0,al
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call pic_delay
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mov al,0x20 ; generate 0x20 +
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out 0x21,al
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call pic_delay
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mov al,0x28 ; generate 0x28 +
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out 0xA1,al
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call pic_delay
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mov al,0x04 ; slave at irq2
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out 0x21,al
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call pic_delay
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mov al,0x02 ; at irq9
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out 0xA1,al
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call pic_delay
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mov al,0x01 ; 8086 mode
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out 0x21,al
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call pic_delay
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out 0xA1,al
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call pic_delay
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mov al,255 ; mask all irq's
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out 0xA1,al
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call pic_delay
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out 0x21,al
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call pic_delay
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mov ecx,0x1000
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cld
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picl1: call pic_delay
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loop picl1
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mov al,255 ; mask all irq's
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out 0xA1,al
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call pic_delay
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out 0x21,al
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call pic_delay
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ret
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align 4
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;proc enable_irq stdcall, irq_line:dword
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enable_irq: ; FIXME make fastcall
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mov ebx, [esp+4] ;irq_line
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mov edx, 0x21
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cmp ebx, 8
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jb @F
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mov edx, 0xA1
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sub ebx,8
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@@:
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in al,dx
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btr eax, ebx
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out dx, al
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ret 4
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align 4
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;proc irq_eoi fastcall, irq_line:dword
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irq_eoi:
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cmp cl, 8
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mov al, 0x20
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jb @f
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out 0xa0, al
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@@:
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out 0x20, al
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ret
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