1 files changed, 188 insertions, 0 deletions

diff --git a/private/ntos/nthals/halx86/i386/ixsysbus.c b/private/ntos/nthals/halx86/i386/ixsysbus.c
new file mode 100644
index 000000000..a5463cb31
--- /dev/null
+++ b/private/ntos/nthals/halx86/i386/ixsysbus.c
@@ -0,0 +1,188 @@
+/*++
+
+
+Copyright (c) 1989  Microsoft Corporation
+
+Module Name:
+
+    ixsysbus.c
+
+Abstract:
+
+Author:
+
+Environment:
+
+Revision History:
+
+
+--*/
+
+#include "halp.h"
+
+ULONG HalpDefaultInterruptAffinity;
+
+BOOLEAN
+HalpTranslateSystemBusAddress(
+    IN PBUS_HANDLER BusHandler,
+    IN PBUS_HANDLER RootHandler,
+    IN PHYSICAL_ADDRESS BusAddress,
+    IN OUT PULONG AddressSpace,
+    OUT PPHYSICAL_ADDRESS TranslatedAddress
+    );
+
+ULONG
+HalpGetSystemInterruptVector(
+    IN PBUS_HANDLER BusHandler,
+    IN PBUS_HANDLER RootHandler,
+    IN ULONG BusInterruptLevel,
+    IN ULONG BusInterruptVector,
+    OUT PKIRQL Irql,
+    OUT PKAFFINITY Affinity
+    );
+
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE,HalpGetSystemInterruptVector)
+#endif
+
+
+BOOLEAN
+HalpTranslateSystemBusAddress(
+    IN PBUS_HANDLER BusHandler,
+    IN PBUS_HANDLER RootHandler,
+    IN PHYSICAL_ADDRESS BusAddress,
+    IN OUT PULONG AddressSpace,
+    OUT PPHYSICAL_ADDRESS TranslatedAddress
+    )
+
+/*++
+
+Routine Description:
+
+    This function translates a bus-relative address space and address into
+    a system physical address.
+
+Arguments:
+
+    BusAddress        - Supplies the bus-relative address
+
+    AddressSpace      -  Supplies the address space number.
+                         Returns the host address space number.
+
+                         AddressSpace == 0 => memory space
+                         AddressSpace == 1 => I/O space
+
+    TranslatedAddress - Supplies a pointer to return the translated address
+
+Return Value:
+
+    A return value of TRUE indicates that a system physical address
+    corresponding to the supplied bus relative address and bus address
+    number has been returned in TranslatedAddress.
+
+    A return value of FALSE occurs if the translation for the address was
+    not possible
+
+--*/
+
+{
+    PSUPPORTED_RANGE    pRange;
+
+    pRange = NULL;
+    switch (*AddressSpace) {
+        case 0:
+            // verify memory address is within buses memory limits
+            for (pRange = &BusHandler->BusAddresses->PrefetchMemory; pRange; pRange = pRange->Next) {
+                if (BusAddress.QuadPart >= pRange->Base &&
+                    BusAddress.QuadPart <= pRange->Limit) {
+                        break;
+                }
+            }
+
+            if (!pRange) {
+                for (pRange = &BusHandler->BusAddresses->Memory; pRange; pRange = pRange->Next) {
+                    if (BusAddress.QuadPart >= pRange->Base &&
+                        BusAddress.QuadPart <= pRange->Limit) {
+                            break;
+                    }
+                }
+            }
+
+            break;
+
+        case 1:
+            // verify IO address is within buses IO limits
+            for (pRange = &BusHandler->BusAddresses->IO; pRange; pRange = pRange->Next) {
+                if (BusAddress.QuadPart >= pRange->Base &&
+                    BusAddress.QuadPart <= pRange->Limit) {
+                        break;
+                }
+            }
+            break;
+    }
+
+    if (pRange) {
+        TranslatedAddress->QuadPart = BusAddress.QuadPart + pRange->SystemBase;
+        *AddressSpace = pRange->SystemAddressSpace;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+
+ULONG
+HalpGetSystemInterruptVector(
+    IN PBUS_HANDLER BusHandler,
+    IN PBUS_HANDLER RootHandler,
+    IN ULONG BusInterruptLevel,
+    IN ULONG BusInterruptVector,
+    OUT PKIRQL Irql,
+    OUT PKAFFINITY Affinity
+    )
+
+/*++
+
+Routine Description:
+
+Arguments:
+
+    BusInterruptLevel - Supplies the bus specific interrupt level.
+
+    BusInterruptVector - Supplies the bus specific interrupt vector.
+
+    Irql - Returns the system request priority.
+
+    Affinity - Returns the system wide irq affinity.
+
+Return Value:
+
+    Returns the system interrupt vector corresponding to the specified device.
+
+--*/
+{
+    ULONG SystemVector;
+
+    UNREFERENCED_PARAMETER( BusHandler );
+    UNREFERENCED_PARAMETER( RootHandler );
+    UNREFERENCED_PARAMETER( BusInterruptVector );
+
+    SystemVector = BusInterruptLevel + PRIMARY_VECTOR_BASE;
+    if (SystemVector < PRIMARY_VECTOR_BASE                           ||
+        SystemVector > PRIMARY_VECTOR_BASE + HIGHEST_LEVEL_FOR_8259  ||
+        HalpIDTUsage[SystemVector].Flags & IDTOwned ) {
+
+        //
+        // This is an illegal BusInterruptVector and cannot be connected.
+        //
+
+        return(0);
+    }
+
+    *Irql = (KIRQL)(HIGHEST_LEVEL_FOR_8259 + PRIMARY_VECTOR_BASE - SystemVector);
+    *Affinity = HalpDefaultInterruptAffinity;
+    ASSERT(HalpDefaultInterruptAffinity);
+    return SystemVector;
+}
+