update to acpica-unix2-20130927
acpica-unix2-20130823
PANKOVs restructure

@@ -1,14 +1,13 @@
-
 /******************************************************************************
  *
  * Name: hwtimer.c - ACPI Power Management Timer Interface
  *
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2011, Intel Corp.
+ * Copyright (C) 2000 - 2013, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:

@@ -40,17 +39,20 @@
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGES.
  */
 
+#define EXPORT_ACPI_INTERFACES
+
 #include "acpi.h"
 #include "accommon.h"
 
 #define _COMPONENT          ACPI_HARDWARE
         ACPI_MODULE_NAME    ("hwtimer")
 
 
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
 /******************************************************************************
  *
  * FUNCTION:    AcpiGetTimerResolution
  *
  * PARAMETERS:  Resolution          - Where the resolution is returned

@@ -113,12 +115,18 @@
     if (!Ticks)
     {
         return_ACPI_STATUS (AE_BAD_PARAMETER);
     }
 
-    Status = AcpiHwRead (Ticks, &AcpiGbl_FADT.XPmTimerBlock);
+    /* ACPI 5.0A: PM Timer is optional */
 
+    if (!AcpiGbl_FADT.XPmTimerBlock.Address)
+    {
+        return_ACPI_STATUS (AE_SUPPORT);
+    }
+
+    Status = AcpiHwRead (Ticks, &AcpiGbl_FADT.XPmTimerBlock);
     return_ACPI_STATUS (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiGetTimer)
 

@@ -169,10 +177,17 @@
     if (!TimeElapsed)
     {
         return_ACPI_STATUS (AE_BAD_PARAMETER);
     }
 
+    /* ACPI 5.0A: PM Timer is optional */
+
+    if (!AcpiGbl_FADT.XPmTimerBlock.Address)
+    {
+        return_ACPI_STATUS (AE_SUPPORT);
+    }
+
     /*
      * Compute Tick Delta:
      * Handle (max one) timer rollovers on 24-bit versus 32-bit timers.
      */
     if (StartTicks < EndTicks)

@@ -201,16 +216,18 @@
     }
 
     /*
      * Compute Duration (Requires a 64-bit multiply and divide):
      *
-     * TimeElapsed = (DeltaTicks * 1000000) / PM_TIMER_FREQUENCY;
+     * TimeElapsed (microseconds) =
+     *  (DeltaTicks * ACPI_USEC_PER_SEC) / ACPI_PM_TIMER_FREQUENCY;
      */
-    Status = AcpiUtShortDivide (((UINT64) DeltaTicks) * 1000000,
-                PM_TIMER_FREQUENCY, &Quotient, NULL);
+    Status = AcpiUtShortDivide (((UINT64) DeltaTicks) * ACPI_USEC_PER_SEC,
+                ACPI_PM_TIMER_FREQUENCY, &Quotient, NULL);
 
     *TimeElapsed = (UINT32) Quotient;
     return_ACPI_STATUS (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiGetTimerDuration)
 
+#endif /* !ACPI_REDUCED_HARDWARE */