---

yaml
---
r: 193490
b: refs/heads/master
c: 69ec87e
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 729df0f848daf2f17d02107199fa92efe909d995
+refs/heads/master: 69ec87efa815d69140423014bb5f91e034faac22

trunk/drivers/acpi/acpica/acglobal.h

@@ -117,6 +117,14 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_use_default_register_widths, TRUE);
  */
 u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
 
+/*
+ * Optionally copy the entire DSDT to local memory (instead of simply
+ * mapping it.) There are some BIOSs that corrupt or replace the original
+ * DSDT, creating the need for this option. Default is FALSE, do not copy
+ * the DSDT.
+ */
+u8 ACPI_INIT_GLOBAL(acpi_gbl_copy_dsdt_locally, FALSE);
+
 /* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */
 
 struct acpi_table_fadt acpi_gbl_FADT;

trunk/drivers/acpi/acpica/actables.h

@@ -109,6 +109,8 @@ acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length);
 
 void acpi_tb_check_dsdt_header(void);
 
+void acpi_tb_copy_dsdt(struct acpi_table_desc *table_desc);
+
 void
 acpi_tb_install_table(acpi_physical_address address,
 		      char *signature, u32 table_index);

trunk/drivers/acpi/acpica/psxface.c

@@ -46,6 +46,7 @@
 #include "acparser.h"
 #include "acdispat.h"
 #include "acinterp.h"
+#include "actables.h"
 #include "amlcode.h"
 
 #define _COMPONENT          ACPI_PARSER

trunk/drivers/acpi/acpica/tbutils.c

@@ -385,6 +385,41 @@ void acpi_tb_check_dsdt_header(void)
 	}
 }
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_copy_dsdt
+ *
+ * PARAMETERS:  table_desc          - Installed table to copy
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory.
+ *              Some very bad BIOSs are known to either corrupt the DSDT or
+ *              install a new, bad DSDT. This copy works around the problem.
+ *
+ ******************************************************************************/
+
+void acpi_tb_copy_dsdt(struct acpi_table_desc *table_desc)
+{
+	struct acpi_table_header *new_table;
+
+	new_table = ACPI_ALLOCATE(table_desc->length);
+	if (!new_table) {
+		ACPI_ERROR((AE_INFO, "Could not copy DSDT of length 0x%X",
+			    table_desc->length));
+		return;
+	}
+
+	ACPI_MEMCPY(new_table, table_desc->pointer, table_desc->length);
+	acpi_tb_delete_table(table_desc);
+	table_desc->pointer = new_table;
+	table_desc->flags = ACPI_TABLE_ORIGIN_ALLOCATED;
+
+	ACPI_INFO((AE_INFO,
+		   "Forced DSDT copy: length 0x%05X copied locally, original unmapped",
+		   new_table->length));
+}
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_tb_install_table

trunk/drivers/acpi/acpica/tbxface.c

@@ -531,6 +531,16 @@ static acpi_status acpi_tb_load_namespace(void)
 		goto unlock_and_exit;
 	}
 
+	/*
+	 * Optionally copy the entire DSDT to local memory (instead of simply
+	 * mapping it.) There are some BIOSs that corrupt or replace the original
+	 * DSDT, creating the need for this option. Default is FALSE, do not copy
+	 * the DSDT.
+	 */
+	if (acpi_gbl_copy_dsdt_locally) {
+		acpi_tb_copy_dsdt(acpi_gbl_DSDT);
+	}
+
 	/*
 	 * Save the original DSDT header for detection of table corruption
 	 * and/or replacement of the DSDT from outside the OS.

trunk/include/acpi/acpixf.h

@@ -68,6 +68,7 @@ extern u8 acpi_gbl_use_default_register_widths;
 extern acpi_name acpi_gbl_trace_method_name;
 extern u32 acpi_gbl_trace_flags;
 extern u8 acpi_gbl_enable_aml_debug_object;
+extern u8 acpi_gbl_copy_dsdt_locally;
 
 extern u32 acpi_current_gpe_count;
 extern struct acpi_table_fadt acpi_gbl_FADT;