From 4a5720e5f30ea6a8d31e75f94046c76ace845126 Mon Sep 17 00:00:00 2001
From: jkim <jkim@FreeBSD.org>
Date: Mon, 29 Sep 2014 19:53:38 +0000
Subject: Import ACPICA 20140926.

---
 source/components/tables/tbxfroot.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'source/components/tables/tbxfroot.c')

diff --git a/source/components/tables/tbxfroot.c b/source/components/tables/tbxfroot.c
index b3b3ed6..04500aa 100644
--- a/source/components/tables/tbxfroot.c
+++ b/source/components/tables/tbxfroot.c
@@ -54,6 +54,43 @@
 
 /*******************************************************************************
  *
+ * FUNCTION:    AcpiTbGetRsdpLength
+ *
+ * PARAMETERS:  Rsdp                - Pointer to RSDP
+ *
+ * RETURN:      Table length
+ *
+ * DESCRIPTION: Get the length of the RSDP
+ *
+ ******************************************************************************/
+
+UINT32
+AcpiTbGetRsdpLength (
+    ACPI_TABLE_RSDP         *Rsdp)
+{
+
+    if (!ACPI_VALIDATE_RSDP_SIG (Rsdp->Signature))
+    {
+        /* BAD Signature */
+
+        return (0);
+    }
+
+    /* "Length" field is available if table version >= 2 */
+
+    if (Rsdp->Revision >= 2)
+    {
+        return (Rsdp->Length);
+    }
+    else
+    {
+        return (ACPI_RSDP_CHECKSUM_LENGTH);
+    }
+}
+
+
+/*******************************************************************************
+ *
  * FUNCTION:    AcpiTbValidateRsdp
  *
  * PARAMETERS:  Rsdp                - Pointer to unvalidated RSDP
-- 
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