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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 593 | mikedld | 2 | ;; ;; |
| 431 | serge | 3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
| 4 | ;; Distributed under terms of the GNU General Public License ;; |
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| 5 | ;; ;; |
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| 593 | mikedld | 6 | ;; PCI16.INC ;; |
| 7 | ;; ;; |
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| 8 | ;; 16 bit PCI driver code ;; |
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| 9 | ;; ;; |
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| 10 | ;; Version 0.2 December 21st, 2002 ;; |
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| 11 | ;; ;; |
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| 12 | ;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
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| 13 | ;; ;; |
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| 14 | ;; See file COPYING for details ;; |
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| 15 | ;; ;; |
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| 431 | serge | 16 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 1 | ha | 17 | |
| 593 | mikedld | 18 | $Revision: 593 $ |
| 1 | ha | 19 | |
| 593 | mikedld | 20 | |
| 1 | ha | 21 | init_pci_16: |
| 22 | |||
| 23 | pushad |
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| 24 | |||
| 25 | xor ax,ax |
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| 26 | mov es,ax |
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| 27 | mov byte [es:0x9020],1 ;default mechanism:1 |
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| 28 | mov ax,0xb101 |
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| 29 | int 0x1a |
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| 30 | or ah,ah |
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| 31 | jnz pci16skip |
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| 32 | |||
| 33 | mov [es:0x9021],cl ;last PCI bus in system |
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| 34 | mov [es:0x9022],bx |
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| 35 | mov [es:0x9024],edi |
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| 36 | |||
| 37 | ; we have a PCI BIOS, so check which configuration mechanism(s) |
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| 38 | ; it supports |
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| 39 | ; AL = PCI hardware characteristics (bit0 => mechanism1, bit1 => mechanism2) |
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| 40 | test al,1 |
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| 41 | jnz pci16skip |
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| 42 | test al,2 |
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| 43 | jz pci16skip |
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| 44 | mov byte [es:0x9020],2 ; if (al&3)==2 => mechanism 2 |
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| 45 | |||
| 46 | pci16skip: |
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| 47 | |||
| 48 | mov ax,0x1000 |
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| 49 | mov es,ax |
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| 50 | |||
| 431 | serge | 51 | popad |