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| 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 2 | ;; ;; |
2 | ;; ;; |
| 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
| 4 | ;; Distributed under terms of the GNU General Public License ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
| 5 | ;; ;; |
5 | ;; ;; |
| 6 | ;; PCI16.INC ;; |
6 | ;; PCI16.INC ;; |
| 7 | ;; ;; |
7 | ;; ;; |
| 8 | ;; 16 bit PCI driver code ;; |
8 | ;; 16 bit PCI driver code ;; |
| 9 | ;; ;; |
9 | ;; ;; |
| 10 | ;; Version 0.2 December 21st, 2002 ;; |
10 | ;; Version 0.2 December 21st, 2002 ;; |
| 11 | ;; ;; |
11 | ;; ;; |
| 12 | ;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
12 | ;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
| 13 | ;; ;; |
13 | ;; ;; |
| 14 | ;; See file COPYING for details ;; |
14 | ;; See file COPYING for details ;; |
| 15 | ;; ;; |
15 | ;; ;; |
| 16 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
16 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| 17 | 17 | ||
| 18 | $Revision: 5363 $ |
18 | $Revision: 7122 $ |
| 19 | 19 | ||
| 20 | 20 | ||
| 21 | init_pci_16: |
21 | init_pci_16: |
| 22 | 22 | ||
| 23 | pushad |
23 | pushad |
| 24 | 24 | ||
| 25 | xor ax, ax |
25 | xor ax, ax |
| 26 | mov es, ax |
26 | mov es, ax |
| 27 | mov byte [es:0x9020], 1;default mechanism:1 |
27 | mov byte [es:BOOT_PCI_DATA], 1;default mechanism:1 |
| 28 | mov ax, 0xb101 |
28 | mov ax, 0xb101 |
| 29 | int 0x1a |
29 | int 0x1a |
| 30 | or ah, ah |
30 | or ah, ah |
| 31 | jnz pci16skip |
31 | jnz pci16skip |
| 32 | 32 | ||
| 33 | mov [es:0x9021], cl;last PCI bus in system |
33 | mov [es:BOOT_PCI_DATA+1], cl;last PCI bus in system |
| 34 | mov [es:0x9022], bx |
34 | mov [es:BOOT_PCI_DATA+2], bx |
| 35 | mov [es:0x9024], edi |
35 | mov [es:BOOT_PCI_DATA+4], edi |
| 36 | 36 | ||
| 37 | ; we have a PCI BIOS, so check which configuration mechanism(s) |
37 | ; we have a PCI BIOS, so check which configuration mechanism(s) |
| 38 | ; it supports |
38 | ; it supports |
| 39 | ; AL = PCI hardware characteristics (bit0 => mechanism1, bit1 => mechanism2) |
39 | ; AL = PCI hardware characteristics (bit0 => mechanism1, bit1 => mechanism2) |
| 40 | test al, 1 |
40 | test al, 1 |
| 41 | jnz pci16skip |
41 | jnz pci16skip |
| 42 | test al, 2 |
42 | test al, 2 |
| 43 | jz pci16skip |
43 | jz pci16skip |
| 44 | mov byte [es:0x9020], 2; if (al&3)==2 => mechanism 2 |
44 | mov byte [es:BOOT_PCI_DATA], 2; if (al&3)==2 => mechanism 2 |
| 45 | 45 | ||
| 46 | pci16skip: |
46 | pci16skip: |
| 47 | 47 | ||
| 48 | mov ax, 0x1000 |
48 | mov ax, 0x1000 |
| 49 | mov es, ax |
49 | mov es, ax |
| 50 | 50 | ||
| 51 | popad |
51 | popad |