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Rev 3598 Rev 3732
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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: 3598 $
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$Revision: 3732 $
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;***************************************************************************
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;***************************************************************************
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;   Function
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;   Function
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;; ============================================
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;; ============================================
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pci_fn_0:
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pci_fn_0:
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; PCI function 0: get pci version (AH.AL)
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; PCI function 0: get pci version (AH.AL)
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        movzx   eax, word [BOOT_VAR+0x9022]
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        movzx   eax, word [BOOT_VARS+0x9022]
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        ret
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        ret
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pci_fn_1:
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pci_fn_1:
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; PCI function 1: get last bus in AL
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; PCI function 1: get last bus in AL
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        mov     al, [BOOT_VAR+0x9021]
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        mov     al, [BOOT_VARS+0x9021]
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        ret
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        ret
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pci_fn_2:
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pci_fn_2:
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; PCI function 2: get pci access mechanism
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; PCI function 2: get pci access mechanism
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        mov     al, [BOOT_VAR+0x9020]
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        mov     al, [BOOT_VARS+0x9020]
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align 4
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align 4
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pci_read_reg:
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pci_read_reg:
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        push    ebx esi
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        push    ebx esi
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        cmp     byte [BOOT_VAR+0x9020], 2;what mechanism will we use?
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        cmp     byte [BOOT_VARS+0x9020], 2;what mechanism will we use?
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        je      pci_read_reg_2
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        je      pci_read_reg_2
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align 4
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align 4
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pci_write_reg:
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pci_write_reg:
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        push    esi ebx
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        push    esi ebx
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        cmp     byte [BOOT_VAR+0x9020], 2;what mechanism will we use?
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        cmp     byte [BOOT_VARS+0x9020], 2;what mechanism will we use?
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        je      pci_write_reg_2
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        je      pci_write_reg_2
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        ;-=-=-=-=-=-=-=-=
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        ;-=-=-=-=-=-=-=-=
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.emulate_bios:
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.emulate_bios:
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        cmp     ebp, 1                  ; PCI_FUNCTION_ID
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        cmp     ebp, 1                  ; PCI_FUNCTION_ID
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        jnz     .not_PCI_BIOS_PRESENT
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        jnz     .not_PCI_BIOS_PRESENT
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        mov     edx, 'PCI '
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        mov     edx, 'PCI '
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        mov     al, [BOOT_VAR + 0x9020]
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        mov     al, [BOOT_VARS + 0x9020]
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        mov     bx, [BOOT_VAR + 0x9022]
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        mov     bx, [BOOT_VARS + 0x9022]
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        mov     cl, [BOOT_VAR + 0x9021]
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        mov     cl, [BOOT_VARS + 0x9021]
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        xor     ah, ah
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        xor     ah, ah
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        jmp     .return_abcd
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        jmp     .return_abcd
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.not_PCI_BIOS_PRESENT:
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.not_PCI_BIOS_PRESENT:
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.no_device:
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.no_device:
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        or      byte [.devfn], 7
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        or      byte [.devfn], 7
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.next_func:
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.next_func:
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        inc     dword [.devfn]
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        inc     dword [.devfn]
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        mov     ah, [.bus]
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        mov     ah, [.bus]
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        cmp     ah, [BOOT_VAR+0x9021]
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        cmp     ah, [BOOT_VARS+0x9021]
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        jbe     .loop
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        jbe     .loop
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.nomemory:
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.nomemory:
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        leave
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        leave
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        ret
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        ret
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endp
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endp