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40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
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* PROJECT: ReactOS PCI Bus Driver
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: drivers/bus/pci/pci/busno.c
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* PURPOSE: Bus Number Management
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include <pci.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ******************************************************************/
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BOOLEAN
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NTAPI
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PciAreBusNumbersConfigured(IN PPCI_PDO_EXTENSION PdoExtension)
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{
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UCHAR PrimaryBus, BaseBus, SecondaryBus, SubordinateBus;
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PAGED_CODE();
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/* Get all relevant bus number details */
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PrimaryBus = PdoExtension->Dependent.type1.PrimaryBus;
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BaseBus = PdoExtension->ParentFdoExtension->BaseBus;
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SecondaryBus = PdoExtension->Dependent.type1.SecondaryBus;
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SubordinateBus = PdoExtension->Dependent.type1.SubordinateBus;
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/* The primary bus should be the base bus of the parent */
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if ((PrimaryBus != BaseBus) || (SecondaryBus <= PrimaryBus)) return FALSE;
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/* The subordinate should be a higher bus number than the secondary */
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return SubordinateBus >= SecondaryBus;
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}
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/* EOF */
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