Add new exception code, AE_IO_ERROR

The intent for this exception is for low-level I/O operations,
especially Clib functions.

Author: acpibob

source/include/acexcep.h

@@ -200,8 +200,9 @@ typedef struct acpi_exception_info
 #define AE_OWNER_ID_LIMIT               EXCEP_ENV (0x001B)
 #define AE_NOT_CONFIGURED               EXCEP_ENV (0x001C)
 #define AE_ACCESS                       EXCEP_ENV (0x001D)
+#define AE_IO_ERROR                     EXCEP_ENV (0x001E)
 
-#define AE_CODE_ENV_MAX                 0x001D
+#define AE_CODE_ENV_MAX                 0x001E
 
 
 /*
@@ -334,7 +335,8 @@ static const ACPI_EXCEPTION_INFO    AcpiGbl_ExceptionNames_Env[] =
     EXCEP_TXT ("AE_NO_HANDLER",                 "A handler for the operation is not installed"),
     EXCEP_TXT ("AE_OWNER_ID_LIMIT",             "There are no more Owner IDs available for ACPI tables or control methods"),
     EXCEP_TXT ("AE_NOT_CONFIGURED",             "The interface is not part of the current subsystem configuration"),
-    EXCEP_TXT ("AE_ACCESS",                     "Permission denied for the requested operation")
+    EXCEP_TXT ("AE_ACCESS",                     "Permission denied for the requested operation"),
+    EXCEP_TXT ("AE_IO_ERROR",                   "An I/O error occurred")
 };
 
 static const ACPI_EXCEPTION_INFO    AcpiGbl_ExceptionNames_Pgm[] =