1 files changed, 143 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/ntdrv/irq.c b/board/MAI/bios_emulator/scitech/src/pm/ntdrv/irq.c
new file mode 100644
index 0000000000..bc6b4274df
--- /dev/null
+++ b/board/MAI/bios_emulator/scitech/src/pm/ntdrv/irq.c
@@ -0,0 +1,143 @@
+/****************************************************************************
+*
+*                   SciTech OS Portability Manager Library
+*																																			
+*  ========================================================================
+*
+*    The contents of this file are subject to the SciTech MGL Public
+*    License Version 1.0 (the "License"); you may not use this file
+*    except in compliance with the License. You may obtain a copy of
+*    the License at http://www.scitechsoft.com/mgl-license.txt
+*
+*    Software distributed under the License is distributed on an
+*    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+*    implied. See the License for the specific language governing
+*    rights and limitations under the License.
+*
+*    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
+*
+*    The Initial Developer of the Original Code is SciTech Software, Inc.
+*    All Rights Reserved.
+*
+*  ========================================================================
+*
+* Language:     ANSI C
+* Environment:  32-bit Windows NT device drivers.
+*
+* Description:  Implementation for the NT driver IRQ management functions
+*               for the PM library.
+*
+****************************************************************************/
+
+#include "pmapi.h"
+#include "pmint.h"
+#include "drvlib/os/os.h"
+#include "sdd/sddhelp.h"
+#include "mtrr.h"
+#include "oshdr.h"
+
+/*--------------------------- Global variables ----------------------------*/
+
+static int          globalDataStart;
+static uchar        _PM_oldCMOSRegA;
+static uchar        _PM_oldCMOSRegB;
+static uchar        _PM_oldRTCPIC2;
+static ulong        RTC_idtEntry;
+PM_intHandler       _PM_rtcHandler = NULL;
+PMFARPTR    _VARAPI _PM_prevRTC = PMNULL;
+
+/*----------------------------- Implementation ----------------------------*/
+
+/* Functions to read and write CMOS registers */
+
+uchar   _ASMAPI _PM_readCMOS(int index);
+void    _ASMAPI _PM_writeCMOS(int index,uchar value);
+void    _ASMAPI _PM_rtcISR(void);
+void    _ASMAPI _PM_getISR(int irq,PMFARPTR *handler);
+void    _ASMAPI _PM_setISR(int irq,void *handler);
+void    _ASMAPI _PM_restoreISR(int irq,PMFARPTR *handler);
+void    _ASMAPI _PM_irqCodeStart(void);
+void    _ASMAPI _PM_irqCodeEnd(void);
+
+/****************************************************************************
+REMARKS:
+Set the real time clock frequency (for stereo modes).
+****************************************************************************/
+void PMAPI PM_setRealTimeClockFrequency(
+    int frequency)
+{
+    static short convert[] = {
+        8192,
+        4096,
+        2048,
+        1024,
+        512,
+        256,
+        128,
+        64,
+        32,
+        16,
+        8,
+        4,
+        2,
+        -1,
+        };
+    int i;
+
+    /* First clear any pending RTC timeout if not cleared */
+    _PM_readCMOS(0x0C);
+    if (frequency == 0) {
+        /* Disable RTC timout */
+        _PM_writeCMOS(0x0A,(uchar)_PM_oldCMOSRegA);
+        _PM_writeCMOS(0x0B,(uchar)(_PM_oldCMOSRegB & 0x0F));
+        }
+    else {
+        /* Convert frequency value to RTC clock indexes */
+        for (i = 0; convert[i] != -1; i++) {
+            if (convert[i] == frequency)
+                break;
+            }
+
+        /* Set RTC timout value and enable timeout */
+        _PM_writeCMOS(0x0A,(uchar)(0x20 | (i+3)));
+        _PM_writeCMOS(0x0B,(uchar)((_PM_oldCMOSRegB & 0x0F) | 0x40));
+        }
+}
+
+ibool PMAPI PM_setRealTimeClockHandler(PM_intHandler th,int frequency)
+{
+    static ibool    locked = false;
+
+    /* Save the old CMOS real time clock values */
+    _PM_oldCMOSRegA = _PM_readCMOS(0x0A);
+    _PM_oldCMOSRegB = _PM_readCMOS(0x0B);
+
+    /* Install the interrupt handler */
+    RTC_idtEntry = 0x38;
+    _PM_getISR(RTC_idtEntry, &_PM_prevRTC);
+    _PM_rtcHandler = th;
+    _PM_setISR(RTC_idtEntry, _PM_rtcISR);
+
+    /* Program the real time clock default frequency */
+    PM_setRealTimeClockFrequency(frequency);
+
+    /* Unmask IRQ8 in the PIC2 */
+    _PM_oldRTCPIC2 = PM_inpb(0xA1);
+    PM_outpb(0xA1,(uchar)(_PM_oldRTCPIC2 & 0xFE));
+    return true;
+}
+
+void PMAPI PM_restoreRealTimeClockHandler(void)
+{
+    if (_PM_rtcHandler) {
+        /* Restore CMOS registers and mask RTC clock */
+        _PM_writeCMOS(0x0A,_PM_oldCMOSRegA);
+        _PM_writeCMOS(0x0B,_PM_oldCMOSRegB);
+        PM_outpb(0xA1,(uchar)((PM_inpb(0xA1) & 0xFE) | (_PM_oldRTCPIC2 & ~0xFE)));
+
+        /* Restore the interrupt vector */
+        _PM_restoreISR(RTC_idtEntry, &_PM_prevRTC);
+        _PM_rtcHandler = NULL;
+        }
+}
+