hal/halx86/isa.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/hal/isa.c
   6  * PURPOSE:         Interfaces to the ISA bus
   7  * PROGRAMMER:      David Welch (welch@mcmail.com)
   8  * UPDATE HISTORY:
   9  *               05/06/98: Created
  10  */
  11
  12 /* INCLUDES ***************************************************************/
  13
  14 #include <roscfg.h>
  15 #include <ddk/ntddk.h>
  16 #include <bus.h>
  17 #ifdef MP
  18 #include <mps.h>
  19 #endif
  20
  21
  22 /* FUNCTIONS *****************************************************************/
  23
  24 BOOL HalIsaProbe(VOID)
  25 /*
  26  * FUNCTION: Probes for an ISA bus
  27  * RETURNS: True if detected
  28  * NOTE: Since ISA is the default we are called last and always return
  29  * true
  30  */
  31 {
  32    DbgPrint("Assuming ISA bus\n");
  33
  34    /*
  35     * Probe for plug and play support
  36     */
  37    return(TRUE);
  38 }
  39
  40
  41 BOOLEAN STDCALL
  42 HalpTranslateIsaBusAddress(PBUS_HANDLER BusHandler,
  43                            ULONG BusNumber,
  44                            PHYSICAL_ADDRESS BusAddress,
  45                            PULONG AddressSpace,
  46                            PPHYSICAL_ADDRESS TranslatedAddress)
  47 {
  48    BOOLEAN Result;
  49
  50    Result = HalTranslateBusAddress(PCIBus,
  51                                    BusNumber,
  52                                    BusAddress,
  53                                    AddressSpace,
  54                                    TranslatedAddress);
  55    if (Result != FALSE)
  56      return Result;
  57
  58    Result = HalTranslateBusAddress(Internal,
  59                                    BusNumber,
  60                                    BusAddress,
  61                                    AddressSpace,
  62                                    TranslatedAddress);
  63    return Result;
  64 }
  65
  66 ULONG STDCALL
  67 HalpGetIsaInterruptVector(PVOID BusHandler,
  68                           ULONG BusNumber,
  69                           ULONG BusInterruptLevel,
  70                           ULONG BusInterruptVector,
  71                           PKIRQL Irql,
  72                           PKAFFINITY Affinity)
  73 {
  74 #ifdef MP
  75   *Irql = PROFILE_LEVEL - BusInterruptVector;
  76   *Affinity = 0xFFFFFFFF;
  77   return IRQ2VECTOR(BusInterruptVector);
  78 #else
  79   *Irql = PROFILE_LEVEL - BusInterruptVector;
  80   *Affinity = 0xFFFFFFFF;
  81   return BusInterruptVector;
  82 #endif
  83 }
  84 /* EOF */