1 files changed, 153 insertions, 0 deletions
diff --git a/private/ntos/nthals/halavant/alpha/ebmapio.c b/private/ntos/nthals/halavant/alpha/ebmapio.c
new file mode 100644
index 000000000..850894769
--- /dev/null
+++ b/private/ntos/nthals/halavant/alpha/ebmapio.c
@@ -0,0 +1,153 @@
+/*++
+
+Copyright (c) 1993  Digital Equipment Corporation
+
+Module Name:
+
+    ebmapio.c
+
+Abstract:
+
+    This module contains the functions to map HAL-accessed I/O addresses
+    on the Avanti system.
+
+Author:
+
+    Joe Notarangelo  25-Oct-1993
+
+Environment:
+
+    Kernel mode
+
+Revision History:
+
+
+--*/
+
+#include "halp.h"
+#include "avantdef.h"
+
+//
+// Define global data used to locate the EISA control space.
+//
+
+PVOID HalpEisaControlBase;
+PVOID HalpEisaIntAckBase;
+PVOID HalpCMOSRamBase;
+
+
+BOOLEAN
+HalpMapIoSpace (
+    VOID
+    )
+
+/*++
+
+Routine Description:
+
+    This routine maps the HAL I/O space for an Avanti
+    system using the Quasi VA.
+
+Arguments:
+
+    None.
+
+Return Value:
+
+    If the initialization is successfully completed, than a value of TRUE
+    is returned. Otherwise, a value of FALSE is returned.
+
+--*/
+
+{
+    PVOID PciIoSpaceBase;
+
+    //
+    // CMOS ram addresses encoded in nvram.c - kept for commonality 
+    // in environ.c
+    //
+
+    HalpCMOSRamBase = (PVOID) 0;
+
+    //
+    // Map base addresses in QVA space.
+    //
+
+    PciIoSpaceBase = HAL_MAKE_QVA( APECS_PCI_IO_BASE_PHYSICAL );
+
+    HalpEisaControlBase = PciIoSpaceBase;
+    HalpEisaIntAckBase = HAL_MAKE_QVA( APECS_PCI_INTACK_BASE_PHYSICAL );
+
+    //
+    // Map the real-time clock registers.
+    //
+
+    HalpRtcAddressPort = (PVOID)((ULONG)PciIoSpaceBase + RTC_ISA_ADDRESS_PORT);
+    HalpRtcDataPort = (PVOID)((ULONG)PciIoSpaceBase + RTC_ISA_DATA_PORT);
+
+    return TRUE;
+
+}
+
+ULONG
+HalpMapDebugPort(
+    IN ULONG ComPort,
+    OUT PULONG ReadQva,
+    OUT PULONG WriteQva
+    )
+/*++
+
+Routine Description:
+
+    This routine maps the debug com port so that the kernel debugger
+    may function - if called it is called very earlier in the boot sequence.
+
+Arguments:
+
+    ComPort - Supplies the number of the com port to use as the debug port.
+
+    ReadQva - Receives the QVA used to access the read registers of the debug
+              port.
+
+    WriteQva - Receives the QVA used to access the write registers of the
+               debug port.
+
+Return Value:
+
+    Returns the base bus address of the device used as the debug port.
+
+--*/
+{
+    ULONG ComPortAddress;
+    ULONG PortQva;
+
+    //
+    // Compute the port address, based on the desired com port.
+    //
+
+    switch( ComPort ){
+
+    case 1:
+
+        ComPortAddress = COM1_ISA_PORT_ADDRESS;
+	break;
+
+    case 2:
+    default:
+
+        ComPortAddress = COM2_ISA_PORT_ADDRESS;
+
+    }
+
+    //
+    // Return the QVAs for read and write access.
+    //
+
+    PortQva = (ULONG)HAL_MAKE_QVA(APECS_PCI_IO_BASE_PHYSICAL) + ComPortAddress;
+
+    *ReadQva = PortQva;
+    *WriteQva = PortQva;
+
+    return ComPortAddress;
+
+}