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Rev 2465 Rev 3500
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;;                                                              ;;
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;;                                                              ;;
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;;  See file COPYING for details                                ;;
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;;  See file COPYING for details                                ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 2465 $
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$Revision: 3500 $
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 25 
 
26 
;***************************************************************************
 26 
;***************************************************************************
27 
;   Function
 27 
;   Function
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;***************************************************************************
 153 
;***************************************************************************
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 154 
 
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align 4
 155 
align 4
- 
 
 156 
 
156 
 
 157 
pci_read_reg:
157 
pci_read_reg:
 158 
        push    ebx esi
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        cmp     byte [BOOT_VAR+0x9020], 2;what mechanism will we use?
 159 
        cmp     byte [BOOT_VAR+0x9020], 2;what mechanism will we use?
159 
        je      pci_read_reg_2
 160 
        je      pci_read_reg_2
160 
 
 - 
 
161 
                ; mechanism 1
 161 
 
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        push    esi   ; save register size into ESI
 162 
                ; mechanism 1
163 
        mov     esi, eax
 163 
        mov     esi, eax ; save register size into ESI
164 
        and     esi, 3
 164 
        and     esi, 3
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        xchg    eax, [esp]
 200 
        xchg    eax, [esp]
201 
        mov     dx, 0xcf8
 201 
        mov     dx, 0xcf8
202 
        out     dx, eax
 202 
        out     dx, eax
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 203 
 
204 
        pop     eax
 204 
        pop     eax
205 
        pop     esi
 205 
        pop     esi ebx
206 
        ret
 206 
        ret
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pci_read_reg_2:
 207 
pci_read_reg_2:
208 
 
 208 
 
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209 
        test    bh, 128 ;mech#2 only supports 16 devices per bus
 209 
        test    bh, 128 ;mech#2 only supports 16 devices per bus
210 
        jnz     pci_read_reg_err
 - 
 
211 
 
 210 
        jnz     pci_read_reg_err
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        push    esi; save register size into ESI
 211 
 
213 
        mov     esi, eax
 212 
        mov     esi, eax ; save register size into ESI
214 
        and     esi, 3
 213 
        and     esi, 3
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        mov     dl, 0xf8
 259 
        mov     dl, 0xf8
261 
        mov     al, ah
 260 
        mov     al, ah
262 
        out     dx, al
 261 
        out     dx, al
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 262 
 
264 
        pop     eax
 263 
        pop     eax
265 
        pop     esi
 264 
        pop     esi ebx
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        ret
 265 
        ret
267 
 
 266 
 
268 
pci_read_reg_err:
 267 
pci_read_reg_err:
- 
 
 268 
        xor     eax, eax
269 
        xor     eax, eax
 269 
        dec     eax
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        dec     eax
 270 
        pop     esi ebx
271 
        ret
 271 
        ret
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;***************************************************************************
 284 
;***************************************************************************
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 285 
 
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286 
align 4
 286 
align 4
- 
 
 287 
 
287 
 
 288 
pci_write_reg:
288 
pci_write_reg:
 289 
        push    esi ebx
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        cmp     byte [BOOT_VAR+0x9020], 2;what mechanism will we use?
 290 
        cmp     byte [BOOT_VAR+0x9020], 2;what mechanism will we use?
290 
        je      pci_write_reg_2
 291 
        je      pci_write_reg_2
291 
 
 - 
 
292 
                ; mechanism 1
 292 
 
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        push    esi   ; save register size into ESI
 293 
                ; mechanism 1
294 
        mov     esi, eax
 294 
        mov     esi, eax ; save register size into ESI
295 
        and     esi, 3
 295 
        and     esi, 3
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        pop     eax
 333 
        pop     eax
334 
        mov     dl, 0xf8
 334 
        mov     dl, 0xf8
335 
        out     dx, eax
 335 
        out     dx, eax
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 336 
 
337 
        xor     eax, eax
 337 
        xor     eax, eax
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        pop     esi
 338 
        pop     ebx esi
339 
 
 339 
 
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        ret
 340 
        ret
341 
pci_write_reg_2:
 341 
pci_write_reg_2:
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 342 
 
343 
        test    bh, 128 ;mech#2 only supports 16 devices per bus
 - 
 
344 
        jnz     pci_write_reg_err
 343 
        test    bh, 128 ;mech#2 only supports 16 devices per bus
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345 
 
 344 
        jnz     pci_write_reg_err
346 
 
 345 
 
347 
        push    esi; save register size into ESI
 346 
 
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395 
        mov     dl, 0xf8
 394 
        mov     dl, 0xf8
396 
        mov     al, ah
 395 
        mov     al, ah
397 
        out     dx, al
 396 
        out     dx, al
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 397 
 
399 
        xor     eax, eax
 398 
        xor     eax, eax
400 
        pop     esi
 399 
        pop     ebx esi
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        ret
 400 
        ret
402 
 
 401 
 
403 
pci_write_reg_err:
 402 
pci_write_reg_err:
- 
 
 403 
        xor     eax, eax
404 
        xor     eax, eax
 404 
        dec     eax
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        dec     eax
 405 
        pop     ebx esi
406 
        ret
 406 
        ret
407 
 
 407 
 
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.return_ab:
 656 
.return_ab:
657 
        mov     dword[esp + 20], ebx
 657 
        mov     dword[esp + 20], ebx
658 
.return_a:
 658 
.return_a:
659 
        mov     dword[esp + 32], eax
 659 
        mov     dword[esp + 32], eax
660 
        ret
 660 
        ret
- 
 
 661 
 
- 
 
 662 
proc pci_enum
- 
 
 663 
        push    ebp
- 
 
 664 
        mov     ebp, esp
- 
 
 665 
        push    0
- 
 
 666 
virtual at ebp-4
- 
 
 667 
.devfn          db      ?
- 
 
 668 
.bus            db      ?
- 
 
 669 
end virtual
- 
 
 670 
.loop:
- 
 
 671 
        mov     ah, [.bus]
- 
 
 672 
        mov     al, 2
- 
 
 673 
        mov     bh, [.devfn]
- 
 
 674 
        mov     bl, 0
- 
 
 675 
        call    pci_read_reg
- 
 
 676 
        cmp     eax, 0xFFFFFFFF
- 
 
 677 
        jnz     .has_device
- 
 
 678 
        test    byte [.devfn], 7
- 
 
 679 
        jnz     .next_func
- 
 
 680 
        jmp     .no_device
- 
 
 681 
.has_device:
- 
 
 682 
        push    eax
- 
 
 683 
        push    sizeof.PCIDEV
- 
 
 684 
        pop     eax
- 
 
 685 
        call    malloc
- 
 
 686 
        pop     ecx
- 
 
 687 
        test    eax, eax
- 
 
 688 
        jz      .nomemory
- 
 
 689 
        mov     edi, eax
- 
 
 690 
        mov     [edi+PCIDEV.vendor_device_id], ecx
- 
 
 691 
        mov     eax, pcidev_list
- 
 
 692 
        mov     ecx, [eax+PCIDEV.bk]
- 
 
 693 
        mov     [edi+PCIDEV.bk], ecx
- 
 
 694 
        mov     [edi+PCIDEV.fd], eax
- 
 
 695 
        mov     [ecx+PCIDEV.fd], edi
- 
 
 696 
        mov     [eax+PCIDEV.bk], edi
- 
 
 697 
        mov     eax, dword [.devfn]
- 
 
 698 
        mov     word [edi+PCIDEV.devfn], ax
- 
 
 699 
        mov     bh, al
- 
 
 700 
        mov     al, 2
- 
 
 701 
        mov     bl, 8
- 
 
 702 
        call    pci_read_reg
- 
 
 703 
        shr     eax, 8
- 
 
 704 
        mov     [edi+PCIDEV.class], eax
- 
 
 705 
        test    byte [.devfn], 7
- 
 
 706 
        jnz     .next_func
- 
 
 707 
        mov     ah, [.bus]
- 
 
 708 
        mov     al, 0
- 
 
 709 
        mov     bh, [.devfn]
- 
 
 710 
        mov     bl, 0Eh
- 
 
 711 
        call    pci_read_reg
- 
 
 712 
        test    al, al
- 
 
 713 
        js      .next_func
- 
 
 714 
.no_device:
- 
 
 715 
        or      byte [.devfn], 7
- 
 
 716 
.next_func:
- 
 
 717 
        inc     dword [.devfn]
- 
 
 718 
        mov     ah, [.bus]
- 
 
 719 
        cmp     ah, [BOOT_VAR+0x9021]
- 
 
 720 
        jbe     .loop
- 
 
 721 
.nomemory:
- 
 
 722 
        leave
- 
 
 723 
        ret
- 
 
 724 
endp