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-rw-r--r--drivers/acpi/acpica/utxface.c40
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
index 420ebfe08c7..644e8c8ebc4 100644
--- a/drivers/acpi/acpica/utxface.c
+++ b/drivers/acpi/acpica/utxface.c
@@ -5,7 +5,7 @@
*****************************************************************************/
/*
- * Copyright (C) 2000 - 2011, Intel Corp.
+ * Copyright (C) 2000 - 2012, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -48,6 +48,7 @@
#include "acnamesp.h"
#include "acdebug.h"
#include "actables.h"
+#include "acinterp.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utxface")
@@ -640,4 +641,41 @@ acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
}
ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_check_address_range
+ *
+ * PARAMETERS: space_id - Address space ID
+ * Address - Start address
+ * Length - Length
+ * Warn - TRUE if warning on overlap desired
+ *
+ * RETURN: Count of the number of conflicts detected.
+ *
+ * DESCRIPTION: Check if the input address range overlaps any of the
+ * ASL operation region address ranges.
+ *
+ ****************************************************************************/
+u32
+acpi_check_address_range(acpi_adr_space_type space_id,
+ acpi_physical_address address,
+ acpi_size length, u8 warn)
+{
+ u32 overlaps;
+ acpi_status status;
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return (0);
+ }
+
+ overlaps = acpi_ut_check_address_range(space_id, address,
+ (u32)length, warn);
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return (overlaps);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_check_address_range)
#endif /* !ACPI_ASL_COMPILER */