Tables: Fix an issue that FACS initialization is performed twice.

This patch adds a new FACS initialization flag for AcpiTbInitialize().
AcpiEnableSubsystem() might be invoked several times in OS bootup process,
and we don't want FACS initialization to be invoked twice. Lv Zheng.

Signed-off-by: Lv Zheng <[email protected]>

Author: Lv Zheng

source/components/utilities/utxfinit.c

@@ -266,11 +266,14 @@ AcpiEnableSubsystem (
      * Obtain a permanent mapping for the FACS. This is required for the
      * Global Lock and the Firmware Waking Vector
      */
-    Status = AcpiTbInitializeFacs ();
-    if (ACPI_FAILURE (Status))
+    if (!(Flags & ACPI_NO_FACS_INIT))
     {
-        ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
-        return_ACPI_STATUS (Status);
+        Status = AcpiTbInitializeFacs ();
+        if (ACPI_FAILURE (Status))
+        {
+            ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
+            return_ACPI_STATUS (Status);
+        }
     }
 
 #endif /* !ACPI_REDUCED_HARDWARE */

source/include/actypes.h

@@ -654,6 +654,7 @@ typedef UINT64                          ACPI_INTEGER;
 #define ACPI_NO_ACPI_ENABLE             0x10
 #define ACPI_NO_DEVICE_INIT             0x20
 #define ACPI_NO_OBJECT_INIT             0x40
+#define ACPI_NO_FACS_INIT               0x80
 
 /*
  * Initialization state