Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

9 files changed, 3549 insertions, 0 deletions

diff --git a/drivers/acpi/tables/Makefile b/drivers/acpi/tables/Makefile
new file mode 100644
index 00000000000..aa4c69594d9
--- /dev/null
+++ b/drivers/acpi/tables/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for all Linux ACPI interpreter subdirectories
+#
+
+obj-y := tbconvrt.o  tbget.o     tbrsdt.o   tbxface.o  \
+	 tbgetall.o  tbinstal.o  tbutils.o  tbxfroot.o
+
+EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c
new file mode 100644
index 00000000000..334327c1f66
--- /dev/null
+++ b/drivers/acpi/tables/tbconvrt.c
@@ -0,0 +1,564 @@
+/******************************************************************************
+ *
+ * Module Name: tbconvrt - ACPI Table conversion utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbconvrt")
+
+
+u8 acpi_fadt_is_v1;
+EXPORT_SYMBOL(acpi_fadt_is_v1);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table_count
+ *
+ * PARAMETERS:  RSDP            - Pointer to the RSDP
+ *              RSDT            - Pointer to the RSDT/XSDT
+ *
+ * RETURN:      The number of tables pointed to by the RSDT or XSDT.
+ *
+ * DESCRIPTION: Calculate the number of tables.  Automatically handles either
+ *              an RSDT or XSDT.
+ *
+ ******************************************************************************/
+
+u32
+acpi_tb_get_table_count (
+	struct rsdp_descriptor          *RSDP,
+	struct acpi_table_header        *RSDT)
+{
+	u32                             pointer_size;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	if (RSDP->revision < 2) {
+		pointer_size = sizeof (u32);
+	}
+	else {
+		pointer_size = sizeof (u64);
+	}
+
+	/*
+	 * Determine the number of tables pointed to by the RSDT/XSDT.
+	 * This is defined by the ACPI Specification to be the number of
+	 * pointers contained within the RSDT/XSDT.  The size of the pointers
+	 * is architecture-dependent.
+	 */
+	return ((RSDT->length - sizeof (struct acpi_table_header)) / pointer_size);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_to_xsdt
+ *
+ * PARAMETERS:  table_info      - Info about the RSDT
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_convert_to_xsdt (
+	struct acpi_table_desc          *table_info)
+{
+	acpi_size                       table_size;
+	u32                             i;
+	XSDT_DESCRIPTOR         *new_table;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/* Compute size of the converted XSDT */
+
+	table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof (u64)) +
+			  sizeof (struct acpi_table_header);
+
+	/* Allocate an XSDT */
+
+	new_table = ACPI_MEM_CALLOCATE (table_size);
+	if (!new_table) {
+		return (AE_NO_MEMORY);
+	}
+
+	/* Copy the header and set the length */
+
+	ACPI_MEMCPY (new_table, table_info->pointer, sizeof (struct acpi_table_header));
+	new_table->length = (u32) table_size;
+
+	/* Copy the table pointers */
+
+	for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
+		if (acpi_gbl_RSDP->revision < 2) {
+			ACPI_STORE_ADDRESS (new_table->table_offset_entry[i],
+				(ACPI_CAST_PTR (struct rsdt_descriptor_rev1, table_info->pointer))->table_offset_entry[i]);
+		}
+		else {
+			new_table->table_offset_entry[i] =
+				(ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info->pointer))->table_offset_entry[i];
+		}
+	}
+
+	/* Delete the original table (either mapped or in a buffer) */
+
+	acpi_tb_delete_single_table (table_info);
+
+	/* Point the table descriptor to the new table */
+
+	table_info->pointer     = ACPI_CAST_PTR (struct acpi_table_header, new_table);
+	table_info->length      = table_size;
+	table_info->allocation  = ACPI_MEM_ALLOCATED;
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_init_generic_address
+ *
+ * PARAMETERS:  new_gas_struct      - GAS struct to be initialized
+ *              register_bit_width  - Width of this register
+ *              Address             - Address of the register
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Initialize a GAS structure.
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_init_generic_address (
+	struct acpi_generic_address     *new_gas_struct,
+	u8                              register_bit_width,
+	acpi_physical_address           address)
+{
+
+	ACPI_STORE_ADDRESS (new_gas_struct->address, address);
+
+	new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
+	new_gas_struct->register_bit_width = register_bit_width;
+	new_gas_struct->register_bit_offset = 0;
+	new_gas_struct->access_width    = 0;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_fadt1
+ *
+ * PARAMETERS:  local_fadt      - Pointer to new FADT
+ *              original_fadt   - Pointer to old FADT
+ *
+ * RETURN:      Populates local_fadt
+ *
+ * DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_convert_fadt1 (
+	struct fadt_descriptor_rev2    *local_fadt,
+	struct fadt_descriptor_rev1    *original_fadt)
+{
+
+
+	/* ACPI 1.0 FACS */
+	/* The BIOS stored FADT should agree with Revision 1.0 */
+	acpi_fadt_is_v1 = 1;
+
+	/*
+	 * Copy the table header and the common part of the tables.
+	 *
+	 * The 2.0 table is an extension of the 1.0 table, so the entire 1.0
+	 * table can be copied first, then expand some fields to 64 bits.
+	 */
+	ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev1));
+
+	/* Convert table pointers to 64-bit fields */
+
+	ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
+	ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
+
+	/*
+	 * System Interrupt Model isn't used in ACPI 2.0 (local_fadt->Reserved1 = 0;)
+	 */
+
+	/*
+	 * This field is set by the OEM to convey the preferred power management
+	 * profile to OSPM. It doesn't have any 1.0 equivalence.  Since we don't
+	 * know what kind of 32-bit system this is, we will use "unspecified".
+	 */
+	local_fadt->prefer_PM_profile = PM_UNSPECIFIED;
+
+	/*
+	 * Processor Performance State Control. This is the value OSPM writes to
+	 * the SMI_CMD register to assume processor performance state control
+	 * responsibility. There isn't any equivalence in 1.0, but as many 1.x
+	 * ACPI tables contain _PCT and _PSS we also keep this value, unless
+	 * acpi_strict is set.
+	 */
+	if (acpi_strict)
+		local_fadt->pstate_cnt = 0;
+
+	/*
+	 * Support for the _CST object and C States change notification.
+	 * This data item hasn't any 1.0 equivalence so leave it zero.
+	 */
+	local_fadt->cst_cnt = 0;
+
+	/*
+	 * FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0.
+	 * It primarily adds the FADT reset mechanism.
+	 */
+	if ((original_fadt->revision == 2) &&
+		(original_fadt->length == sizeof (struct fadt_descriptor_rev2_minus))) {
+		/*
+		 * Grab the entire generic address struct, plus the 1-byte reset value
+		 * that immediately follows.
+		 */
+		ACPI_MEMCPY (&local_fadt->reset_register,
+			&(ACPI_CAST_PTR (struct fadt_descriptor_rev2_minus, original_fadt))->reset_register,
+  			sizeof (struct acpi_generic_address) + 1);
+	}
+	else {
+		/*
+		 * Since there isn't any equivalence in 1.0 and since it is highly
+		 * likely that a 1.0 system has legacy support.
+		 */
+		local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
+	}
+
+	/*
+	 * Convert the V1.0 block addresses to V2.0 GAS structures
+	 */
+	acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len,
+			  (acpi_physical_address)   local_fadt->V1_pm1a_evt_blk);
+	acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len,
+			  (acpi_physical_address)   local_fadt->V1_pm1b_evt_blk);
+	acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len,
+			  (acpi_physical_address)   local_fadt->V1_pm1a_cnt_blk);
+	acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len,
+			  (acpi_physical_address)   local_fadt->V1_pm1b_cnt_blk);
+	acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len,
+			  (acpi_physical_address)   local_fadt->V1_pm2_cnt_blk);
+	acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len,
+			  (acpi_physical_address)   local_fadt->V1_pm_tmr_blk);
+	acpi_tb_init_generic_address (&local_fadt->xgpe0_blk, 0,
+			  (acpi_physical_address)   local_fadt->V1_gpe0_blk);
+	acpi_tb_init_generic_address (&local_fadt->xgpe1_blk, 0,
+			  (acpi_physical_address)   local_fadt->V1_gpe1_blk);
+
+	/* Create separate GAS structs for the PM1 Enable registers */
+
+	acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
+		 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+		 (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
+			ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+
+	/* PM1B is optional; leave null if not present */
+
+	if (local_fadt->xpm1b_evt_blk.address) {
+		acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
+			 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+			 (acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
+				ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_fadt2
+ *
+ * PARAMETERS:  local_fadt      - Pointer to new FADT
+ *              original_fadt   - Pointer to old FADT
+ *
+ * RETURN:      Populates local_fadt
+ *
+ * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
+ *              Handles optional "X" fields.
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_convert_fadt2 (
+	struct fadt_descriptor_rev2    *local_fadt,
+	struct fadt_descriptor_rev2    *original_fadt)
+{
+
+	/* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
+
+	ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev2));
+
+	/*
+	 * "X" fields are optional extensions to the original V1.0 fields, so
+	 * we must selectively expand V1.0 fields if the corresponding X field
+	 * is zero.
+	 */
+	if (!(local_fadt->xfirmware_ctrl)) {
+		ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
+	}
+
+	if (!(local_fadt->Xdsdt)) {
+		ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
+	}
+
+	if (!(local_fadt->xpm1a_evt_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk,
+			local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1a_evt_blk);
+	}
+
+	if (!(local_fadt->xpm1b_evt_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk,
+			local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1b_evt_blk);
+	}
+
+	if (!(local_fadt->xpm1a_cnt_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk,
+			local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk);
+	}
+
+	if (!(local_fadt->xpm1b_cnt_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk,
+			local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk);
+	}
+
+	if (!(local_fadt->xpm2_cnt_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk,
+			local_fadt->pm2_cnt_len, (acpi_physical_address) local_fadt->V1_pm2_cnt_blk);
+	}
+
+	if (!(local_fadt->xpm_tmr_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk,
+			local_fadt->pm_tm_len, (acpi_physical_address) local_fadt->V1_pm_tmr_blk);
+	}
+
+	if (!(local_fadt->xgpe0_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xgpe0_blk,
+			0, (acpi_physical_address) local_fadt->V1_gpe0_blk);
+	}
+
+	if (!(local_fadt->xgpe1_blk.address)) {
+		acpi_tb_init_generic_address (&local_fadt->xgpe1_blk,
+			0, (acpi_physical_address) local_fadt->V1_gpe1_blk);
+	}
+
+	/* Create separate GAS structs for the PM1 Enable registers */
+
+	acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
+		(u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+		(acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
+			ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+	acpi_gbl_xpm1a_enable.address_space_id = local_fadt->xpm1a_evt_blk.address_space_id;
+
+	/* PM1B is optional; leave null if not present */
+
+	if (local_fadt->xpm1b_evt_blk.address) {
+		acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
+			(u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+			(acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
+				ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+		acpi_gbl_xpm1b_enable.address_space_id = local_fadt->xpm1b_evt_blk.address_space_id;
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_table_fadt
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
+ *              ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
+ *              copied to the local FADT.  The ACPI CA software uses this
+ *              local FADT. Thus a significant amount of special #ifdef
+ *              type codeing is saved.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_convert_table_fadt (void)
+{
+	struct fadt_descriptor_rev2    *local_fadt;
+	struct acpi_table_desc         *table_desc;
+
+
+	ACPI_FUNCTION_TRACE ("tb_convert_table_fadt");
+
+
+	/*
+	 * acpi_gbl_FADT is valid. Validate the FADT length. The table must be
+	 * at least as long as the version 1.0 FADT
+	 */
+	if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev1)) {
+		ACPI_REPORT_ERROR (("FADT is invalid, too short: 0x%X\n", acpi_gbl_FADT->length));
+		return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
+	}
+
+	/* Allocate buffer for the ACPI 2.0(+) FADT */
+
+	local_fadt = ACPI_MEM_CALLOCATE (sizeof (struct fadt_descriptor_rev2));
+	if (!local_fadt) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
+		if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev2)) {
+			/* Length is too short to be a V2.0 table */
+
+			ACPI_REPORT_WARNING (("Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n",
+					 acpi_gbl_FADT->length, acpi_gbl_FADT->revision));
+
+			acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
+		}
+		else {
+			/* Valid V2.0 table */
+
+			acpi_tb_convert_fadt2 (local_fadt, acpi_gbl_FADT);
+		}
+	}
+	else {
+		/* Valid V1.0 table */
+
+		acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
+	}
+
+	/*
+	 * Global FADT pointer will point to the new common V2.0 FADT
+	 */
+	acpi_gbl_FADT = local_fadt;
+	acpi_gbl_FADT->length = sizeof (FADT_DESCRIPTOR);
+
+	/* Free the original table */
+
+	table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next;
+	acpi_tb_delete_single_table (table_desc);
+
+	/* Install the new table */
+
+	table_desc->pointer     = ACPI_CAST_PTR (struct acpi_table_header, acpi_gbl_FADT);
+	table_desc->allocation  = ACPI_MEM_ALLOCATED;
+	table_desc->length      = sizeof (struct fadt_descriptor_rev2);
+
+	/* Dump the entire FADT */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
+		"Hex dump of common internal FADT, size %d (%X)\n",
+		acpi_gbl_FADT->length, acpi_gbl_FADT->length));
+	ACPI_DUMP_BUFFER ((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_table_facs
+ *
+ * PARAMETERS:  table_info      - Info for currently installed FACS
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
+ *              table format.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_build_common_facs (
+	struct acpi_table_desc          *table_info)
+{
+
+	ACPI_FUNCTION_TRACE ("tb_build_common_facs");
+
+
+	/* Absolute minimum length is 24, but the ACPI spec says 64 */
+
+	if (acpi_gbl_FACS->length < 24) {
+		ACPI_REPORT_ERROR (("Invalid FACS table length: 0x%X\n", acpi_gbl_FACS->length));
+		return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
+	}
+
+	if (acpi_gbl_FACS->length < 64) {
+		ACPI_REPORT_WARNING (("FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n",
+			acpi_gbl_FACS->length));
+	}
+
+	/* Copy fields to the new FACS */
+
+	acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);
+
+	if ((acpi_gbl_RSDP->revision < 2) ||
+		(acpi_gbl_FACS->length < 32) ||
+		(!(acpi_gbl_FACS->xfirmware_waking_vector))) {
+		/* ACPI 1.0 FACS or short table or optional X_ field is zero */
+
+		acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR (u64, &(acpi_gbl_FACS->firmware_waking_vector));
+		acpi_gbl_common_fACS.vector_width = 32;
+	}
+	else {
+		/* ACPI 2.0 FACS with valid X_ field */
+
+		acpi_gbl_common_fACS.firmware_waking_vector = &acpi_gbl_FACS->xfirmware_waking_vector;
+		acpi_gbl_common_fACS.vector_width = 64;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
diff --git a/drivers/acpi/tables/tbget.c b/drivers/acpi/tables/tbget.c
new file mode 100644
index 00000000000..896f3ddda62
--- /dev/null
+++ b/drivers/acpi/tables/tbget.c
@@ -0,0 +1,493 @@
+/******************************************************************************
+ *
+ * Module Name: tbget - ACPI Table get* routines
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbget")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table
+ *
+ * PARAMETERS:  Address             - Address of table to retrieve.  Can be
+ *                                    Logical or Physical
+ *              table_info          - Where table info is returned
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Get entire table of unknown size.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_table (
+	struct acpi_pointer             *address,
+	struct acpi_table_desc          *table_info)
+{
+	acpi_status                     status;
+	struct acpi_table_header        header;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_table");
+
+
+	/*
+	 * Get the header in order to get signature and table size
+	 */
+	status = acpi_tb_get_table_header (address, &header);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Get the entire table */
+
+	status = acpi_tb_get_table_body (address, &header, table_info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not get ACPI table (size %X), %s\n",
+			header.length, acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table_header
+ *
+ * PARAMETERS:  Address             - Address of table to retrieve.  Can be
+ *                                    Logical or Physical
+ *              return_header       - Where the table header is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get an ACPI table header.  Works in both physical or virtual
+ *              addressing mode.  Works with both physical or logical pointers.
+ *              Table is either copied or mapped, depending on the pointer
+ *              type and mode of the processor.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_table_header (
+	struct acpi_pointer             *address,
+	struct acpi_table_header        *return_header)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_table_header        *header = NULL;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_table_header");
+
+
+	/*
+	 * Flags contains the current processor mode (Virtual or Physical addressing)
+	 * The pointer_type is either Logical or Physical
+	 */
+	switch (address->pointer_type) {
+	case ACPI_PHYSMODE_PHYSPTR:
+	case ACPI_LOGMODE_LOGPTR:
+
+		/* Pointer matches processor mode, copy the header */
+
+		ACPI_MEMCPY (return_header, address->pointer.logical, sizeof (struct acpi_table_header));
+		break;
+
+
+	case ACPI_LOGMODE_PHYSPTR:
+
+		/* Create a logical address for the physical pointer*/
+
+		status = acpi_os_map_memory (address->pointer.physical, sizeof (struct acpi_table_header),
+				  (void *) &header);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR (("Could not map memory at %8.8X%8.8X for length %X\n",
+				ACPI_FORMAT_UINT64 (address->pointer.physical),
+				sizeof (struct acpi_table_header)));
+			return_ACPI_STATUS (status);
+		}
+
+		/* Copy header and delete mapping */
+
+		ACPI_MEMCPY (return_header, header, sizeof (struct acpi_table_header));
+		acpi_os_unmap_memory (header, sizeof (struct acpi_table_header));
+		break;
+
+
+	default:
+
+		ACPI_REPORT_ERROR (("Invalid address flags %X\n",
+			address->pointer_type));
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Table Signature: [%4.4s]\n",
+		return_header->signature));
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table_body
+ *
+ * PARAMETERS:  Address             - Address of table to retrieve.  Can be
+ *                                    Logical or Physical
+ *              Header              - Header of the table to retrieve
+ *              table_info          - Where the table info is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get an entire ACPI table with support to allow the host OS to
+ *              replace the table with a newer version (table override.)
+ *              Works in both physical or virtual
+ *              addressing mode.  Works with both physical or logical pointers.
+ *              Table is either copied or mapped, depending on the pointer
+ *              type and mode of the processor.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_table_body (
+	struct acpi_pointer             *address,
+	struct acpi_table_header        *header,
+	struct acpi_table_desc          *table_info)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_table_body");
+
+
+	if (!table_info || !address) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Attempt table override.
+	 */
+	status = acpi_tb_table_override (header, table_info);
+	if (ACPI_SUCCESS (status)) {
+		/* Table was overridden by the host OS */
+
+		return_ACPI_STATUS (status);
+	}
+
+	/* No override, get the original table */
+
+	status = acpi_tb_get_this_table (address, header, table_info);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_table_override
+ *
+ * PARAMETERS:  Header              - Pointer to table header
+ *              table_info          - Return info if table is overridden
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Attempts override of current table with a new one if provided
+ *              by the host OS.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_table_override (
+	struct acpi_table_header        *header,
+	struct acpi_table_desc          *table_info)
+{
+	struct acpi_table_header        *new_table;
+	acpi_status                     status;
+	struct acpi_pointer             address;
+
+
+	ACPI_FUNCTION_TRACE ("tb_table_override");
+
+
+	/*
+	 * The OSL will examine the header and decide whether to override this
+	 * table.  If it decides to override, a table will be returned in new_table,
+	 * which we will then copy.
+	 */
+	status = acpi_os_table_override (header, &new_table);
+	if (ACPI_FAILURE (status)) {
+		/* Some severe error from the OSL, but we basically ignore it */
+
+		ACPI_REPORT_ERROR (("Could not override ACPI table, %s\n",
+			acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	if (!new_table) {
+		/* No table override */
+
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	/*
+	 * We have a new table to override the old one.  Get a copy of
+	 * the new one.  We know that the new table has a logical pointer.
+	 */
+	address.pointer_type    = ACPI_LOGICAL_POINTER | ACPI_LOGICAL_ADDRESSING;
+	address.pointer.logical = new_table;
+
+	status = acpi_tb_get_this_table (&address, new_table, table_info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not copy override ACPI table, %s\n",
+			acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	/* Copy the table info */
+
+	ACPI_REPORT_INFO (("Table [%4.4s] replaced by host OS\n",
+		table_info->pointer->signature));
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_this_table
+ *
+ * PARAMETERS:  Address             - Address of table to retrieve.  Can be
+ *                                    Logical or Physical
+ *              Header              - Header of the table to retrieve
+ *              table_info          - Where the table info is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get an entire ACPI table.  Works in both physical or virtual
+ *              addressing mode.  Works with both physical or logical pointers.
+ *              Table is either copied or mapped, depending on the pointer
+ *              type and mode of the processor.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_this_table (
+	struct acpi_pointer             *address,
+	struct acpi_table_header        *header,
+	struct acpi_table_desc          *table_info)
+{
+	struct acpi_table_header        *full_table = NULL;
+	u8                              allocation;
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_this_table");
+
+
+	/*
+	 * Flags contains the current processor mode (Virtual or Physical addressing)
+	 * The pointer_type is either Logical or Physical
+	 */
+	switch (address->pointer_type) {
+	case ACPI_PHYSMODE_PHYSPTR:
+	case ACPI_LOGMODE_LOGPTR:
+
+		/* Pointer matches processor mode, copy the table to a new buffer */
+
+		full_table = ACPI_MEM_ALLOCATE (header->length);
+		if (!full_table) {
+			ACPI_REPORT_ERROR (("Could not allocate table memory for [%4.4s] length %X\n",
+				header->signature, header->length));
+			return_ACPI_STATUS (AE_NO_MEMORY);
+		}
+
+		/* Copy the entire table (including header) to the local buffer */
+
+		ACPI_MEMCPY (full_table, address->pointer.logical, header->length);
+
+		/* Save allocation type */
+
+		allocation = ACPI_MEM_ALLOCATED;
+		break;
+
+
+	case ACPI_LOGMODE_PHYSPTR:
+
+		/*
+		 * Just map the table's physical memory
+		 * into our address space.
+		 */
+		status = acpi_os_map_memory (address->pointer.physical, (acpi_size) header->length,
+				  (void *) &full_table);
+		if (ACPI_FAILURE (status)) {
+			ACPI_REPORT_ERROR (("Could not map memory for table [%4.4s] at %8.8X%8.8X for length %X\n",
+				header->signature,
+				ACPI_FORMAT_UINT64 (address->pointer.physical), header->length));
+			return (status);
+		}
+
+		/* Save allocation type */
+
+		allocation = ACPI_MEM_MAPPED;
+		break;
+
+
+	default:
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid address flags %X\n",
+			address->pointer_type));
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Validate checksum for _most_ tables,
+	 * even the ones whose signature we don't recognize
+	 */
+	if (table_info->type != ACPI_TABLE_FACS) {
+		status = acpi_tb_verify_table_checksum (full_table);
+
+#if (!ACPI_CHECKSUM_ABORT)
+		if (ACPI_FAILURE (status)) {
+			/* Ignore the error if configuration says so */
+
+			status = AE_OK;
+		}
+#endif
+	}
+
+	/* Return values */
+
+	table_info->pointer     = full_table;
+	table_info->length      = (acpi_size) header->length;
+	table_info->allocation  = allocation;
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+		"Found table [%4.4s] at %8.8X%8.8X, mapped/copied to %p\n",
+		full_table->signature,
+		ACPI_FORMAT_UINT64 (address->pointer.physical), full_table));
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table_ptr
+ *
+ * PARAMETERS:  table_type      - one of the defined table types
+ *              Instance        - Which table of this type
+ *              table_ptr_loc   - pointer to location to place the pointer for
+ *                                return
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to get the pointer to an ACPI table.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_table_ptr (
+	acpi_table_type                 table_type,
+	u32                             instance,
+	struct acpi_table_header        **table_ptr_loc)
+{
+	struct acpi_table_desc          *table_desc;
+	u32                             i;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_table_ptr");
+
+
+	if (!acpi_gbl_DSDT) {
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	if (table_type > ACPI_TABLE_MAX) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * For all table types (Single/Multiple), the first
+	 * instance is always in the list head.
+	 */
+	if (instance == 1) {
+		/* Get the first */
+
+		*table_ptr_loc = NULL;
+		if (acpi_gbl_table_lists[table_type].next) {
+			*table_ptr_loc = acpi_gbl_table_lists[table_type].next->pointer;
+		}
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/*
+	 * Check for instance out of range
+	 */
+	if (instance > acpi_gbl_table_lists[table_type].count) {
+		return_ACPI_STATUS (AE_NOT_EXIST);
+	}
+
+	/* Walk the list to get the desired table
+	 * Since the if (Instance == 1) check above checked for the
+	 * first table, setting table_desc equal to the .Next member
+	 * is actually pointing to the second table.  Therefore, we
+	 * need to walk from the 2nd table until we reach the Instance
+	 * that the user is looking for and return its table pointer.
+	 */
+	table_desc = acpi_gbl_table_lists[table_type].next;
+	for (i = 2; i < instance; i++) {
+		table_desc = table_desc->next;
+	}
+
+	/* We are now pointing to the requested table's descriptor */
+
+	*table_ptr_loc = table_desc->pointer;
+
+	return_ACPI_STATUS (AE_OK);
+}
+
diff --git a/drivers/acpi/tables/tbgetall.c b/drivers/acpi/tables/tbgetall.c
new file mode 100644
index 00000000000..adc4270988b
--- /dev/null
+++ b/drivers/acpi/tables/tbgetall.c
@@ -0,0 +1,313 @@
+/******************************************************************************
+ *
+ * Module Name: tbgetall - Get all required ACPI tables
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbgetall")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_primary_table
+ *
+ * PARAMETERS:  Address             - Physical address of table to retrieve
+ *              *table_info         - Where the table info is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Maps the physical address of table into a logical address
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_primary_table (
+	struct acpi_pointer             *address,
+	struct acpi_table_desc          *table_info)
+{
+	acpi_status                     status;
+	struct acpi_table_header        header;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_primary_table");
+
+
+	/* Ignore a NULL address in the RSDT */
+
+	if (!address->pointer.value) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/*
+	 * Get the header in order to get signature and table size
+	 */
+	status = acpi_tb_get_table_header (address, &header);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Clear the table_info */
+
+	ACPI_MEMSET (table_info, 0, sizeof (struct acpi_table_desc));
+
+	/*
+	 * Check the table signature and make sure it is recognized.
+	 * Also checks the header checksum
+	 */
+	table_info->pointer = &header;
+	status = acpi_tb_recognize_table (table_info, ACPI_TABLE_PRIMARY);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Get the entire table */
+
+	status = acpi_tb_get_table_body (address, &header, table_info);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Install the table */
+
+	status = acpi_tb_install_table (table_info);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_secondary_table
+ *
+ * PARAMETERS:  Address             - Physical address of table to retrieve
+ *              *table_info         - Where the table info is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Maps the physical address of table into a logical address
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_secondary_table (
+	struct acpi_pointer             *address,
+	acpi_string                     signature,
+	struct acpi_table_desc          *table_info)
+{
+	acpi_status                     status;
+	struct acpi_table_header        header;
+
+
+	ACPI_FUNCTION_TRACE_STR ("tb_get_secondary_table", signature);
+
+
+	/* Get the header in order to match the signature */
+
+	status = acpi_tb_get_table_header (address, &header);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Signature must match request */
+
+	if (ACPI_STRNCMP (header.signature, signature, ACPI_NAME_SIZE)) {
+		ACPI_REPORT_ERROR (("Incorrect table signature - wanted [%s] found [%4.4s]\n",
+			signature, header.signature));
+		return_ACPI_STATUS (AE_BAD_SIGNATURE);
+	}
+
+	/*
+	 * Check the table signature and make sure it is recognized.
+	 * Also checks the header checksum
+	 */
+	table_info->pointer = &header;
+	status = acpi_tb_recognize_table (table_info, ACPI_TABLE_SECONDARY);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Get the entire table */
+
+	status = acpi_tb_get_table_body (address, &header, table_info);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Install the table */
+
+	status = acpi_tb_install_table (table_info);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_required_tables
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load and validate tables other than the RSDT.  The RSDT must
+ *              already be loaded and validated.
+ *
+ *              Get the minimum set of ACPI tables, namely:
+ *
+ *              1) FADT (via RSDT in loop below)
+ *              2) FACS (via FADT)
+ *              3) DSDT (via FADT)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_required_tables (
+	void)
+{
+	acpi_status                     status = AE_OK;
+	u32                             i;
+	struct acpi_table_desc          table_info;
+	struct acpi_pointer             address;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_required_tables");
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%d ACPI tables in RSDT\n",
+		acpi_gbl_rsdt_table_count));
+
+
+	address.pointer_type  = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING;
+
+	/*
+	 * Loop through all table pointers found in RSDT.
+	 * This will NOT include the FACS and DSDT - we must get
+	 * them after the loop.
+	 *
+	 * The only tables we are interested in getting here is the FADT and
+	 * any SSDTs.
+	 */
+	for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
+		/* Get the table address from the common internal XSDT */
+
+		address.pointer.value = acpi_gbl_XSDT->table_offset_entry[i];
+
+		/*
+		 * Get the tables needed by this subsystem (FADT and any SSDTs).
+		 * NOTE: All other tables are completely ignored at this time.
+		 */
+		status = acpi_tb_get_primary_table (&address, &table_info);
+		if ((status != AE_OK) && (status != AE_TABLE_NOT_SUPPORTED)) {
+			ACPI_REPORT_WARNING (("%s, while getting table at %8.8X%8.8X\n",
+				acpi_format_exception (status),
+				ACPI_FORMAT_UINT64 (address.pointer.value)));
+		}
+	}
+
+	/* We must have a FADT to continue */
+
+	if (!acpi_gbl_FADT) {
+		ACPI_REPORT_ERROR (("No FADT present in RSDT/XSDT\n"));
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	/*
+	 * Convert the FADT to a common format.  This allows earlier revisions of the
+	 * table to coexist with newer versions, using common access code.
+	 */
+	status = acpi_tb_convert_table_fadt ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not convert FADT to internal common format\n"));
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * Get the FACS (Pointed to by the FADT)
+	 */
+	address.pointer.value = acpi_gbl_FADT->xfirmware_ctrl;
+
+	status = acpi_tb_get_secondary_table (&address, FACS_SIG, &table_info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not get/install the FACS, %s\n",
+			acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * Create the common FACS pointer table
+	 * (Contains pointers to the original table)
+	 */
+	status = acpi_tb_build_common_facs (&table_info);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * Get/install the DSDT (Pointed to by the FADT)
+	 */
+	address.pointer.value = acpi_gbl_FADT->Xdsdt;
+
+	status = acpi_tb_get_secondary_table (&address, DSDT_SIG, &table_info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not get/install the DSDT\n"));
+		return_ACPI_STATUS (status);
+	}
+
+	/* Set Integer Width (32/64) based upon DSDT revision */
+
+	acpi_ut_set_integer_width (acpi_gbl_DSDT->revision);
+
+	/* Dump the entire DSDT */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
+		"Hex dump of entire DSDT, size %d (0x%X), Integer width = %d\n",
+		acpi_gbl_DSDT->length, acpi_gbl_DSDT->length, acpi_gbl_integer_bit_width));
+	ACPI_DUMP_BUFFER ((u8 *) acpi_gbl_DSDT, acpi_gbl_DSDT->length);
+
+	/* Always delete the RSDP mapping, we are done with it */
+
+	acpi_tb_delete_tables_by_type (ACPI_TABLE_RSDP);
+	return_ACPI_STATUS (status);
+}
+
+
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
new file mode 100644
index 00000000000..85d5bb01022
--- /dev/null
+++ b/drivers/acpi/tables/tbinstal.c
@@ -0,0 +1,553 @@
+/******************************************************************************
+ *
+ * Module Name: tbinstal - ACPI table installation and removal
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbinstal")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_match_signature
+ *
+ * PARAMETERS:  Signature           - Table signature to match
+ *              table_info          - Return data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned"
+ *              tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_match_signature (
+	char                            *signature,
+	struct acpi_table_desc          *table_info,
+	u8                              search_type)
+{
+	acpi_native_uint                i;
+
+
+	ACPI_FUNCTION_TRACE ("tb_match_signature");
+
+
+	/*
+	 * Search for a signature match among the known table types
+	 */
+	for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
+		if (!(acpi_gbl_table_data[i].flags & search_type)) {
+			continue;
+		}
+
+		if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature,
+				   acpi_gbl_table_data[i].sig_length)) {
+			/* Found a signature match, return index if requested */
+
+			if (table_info) {
+				table_info->type = (u8) i;
+			}
+
+			ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+				"Table [%4.4s] is an ACPI table consumed by the core subsystem\n",
+				(char *) acpi_gbl_table_data[i].signature));
+
+			return_ACPI_STATUS (AE_OK);
+		}
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+		"Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n",
+		(char *) signature));
+
+	return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_install_table
+ *
+ * PARAMETERS:  table_info          - Return value from acpi_tb_get_table_body
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load and validate all tables other than the RSDT.  The RSDT must
+ *              already be loaded and validated.
+ *              Install the table into the global data structs.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_install_table (
+	struct acpi_table_desc          *table_info)
+{
+	acpi_status                     status;
+
+	ACPI_FUNCTION_TRACE ("tb_install_table");
+
+
+	/* Lock tables while installing */
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n",
+			table_info->pointer->signature, acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	/* Install the table into the global data structure */
+
+	status = acpi_tb_init_table_descriptor (table_info->type, table_info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n",
+			table_info->pointer->signature, acpi_format_exception (status)));
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n",
+		acpi_gbl_table_data[table_info->type].name, table_info->pointer));
+
+	(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_recognize_table
+ *
+ * PARAMETERS:  table_info          - Return value from acpi_tb_get_table_body
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check a table signature for a match against known table types
+ *
+ * NOTE:  All table pointers are validated as follows:
+ *          1) Table pointer must point to valid physical memory
+ *          2) Signature must be 4 ASCII chars, even if we don't recognize the
+ *             name
+ *          3) Table must be readable for length specified in the header
+ *          4) Table checksum must be valid (with the exception of the FACS
+ *             which has no checksum for some odd reason)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_recognize_table (
+	struct acpi_table_desc          *table_info,
+	u8                              search_type)
+{
+	struct acpi_table_header        *table_header;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("tb_recognize_table");
+
+
+	/* Ensure that we have a valid table pointer */
+
+	table_header = (struct acpi_table_header *) table_info->pointer;
+	if (!table_header) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * We only "recognize" a limited number of ACPI tables -- namely, the
+	 * ones that are used by the subsystem (DSDT, FADT, etc.)
+	 *
+	 * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
+	 * This can be any one of many valid ACPI tables, it just isn't one of
+	 * the tables that is consumed by the core subsystem
+	 */
+	status = acpi_tb_match_signature (table_header->signature, table_info, search_type);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_tb_validate_table_header (table_header);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Return the table type and length via the info struct */
+
+	table_info->length = (acpi_size) table_header->length;
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_init_table_descriptor
+ *
+ * PARAMETERS:  table_type          - The type of the table
+ *              table_info          - A table info struct
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Install a table into the global data structs.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_init_table_descriptor (
+	acpi_table_type                 table_type,
+	struct acpi_table_desc          *table_info)
+{
+	struct acpi_table_list          *list_head;
+	struct acpi_table_desc          *table_desc;
+
+
+	ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type);
+
+
+	/* Allocate a descriptor for this table */
+
+	table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
+	if (!table_desc) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	/*
+	 * Install the table into the global data structure
+	 */
+	list_head = &acpi_gbl_table_lists[table_type];
+
+	/*
+	 * Two major types of tables:  1) Only one instance is allowed.  This
+	 * includes most ACPI tables such as the DSDT.  2) Multiple instances of
+	 * the table are allowed.  This includes SSDT and PSDTs.
+	 */
+	if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) {
+		/*
+		 * Only one table allowed, and a table has alread been installed
+		 * at this location, so return an error.
+		 */
+		if (list_head->next) {
+			ACPI_MEM_FREE (table_desc);
+			return_ACPI_STATUS (AE_ALREADY_EXISTS);
+		}
+
+		table_desc->next = list_head->next;
+		list_head->next = table_desc;
+
+		if (table_desc->next) {
+			table_desc->next->prev = table_desc;
+		}
+
+		list_head->count++;
+	}
+	else {
+		/*
+		 * Link the new table in to the list of tables of this type.
+		 * Insert at the end of the list, order IS IMPORTANT.
+		 *
+		 * table_desc->Prev & Next are already NULL from calloc()
+		 */
+		list_head->count++;
+
+		if (!list_head->next) {
+			list_head->next = table_desc;
+		}
+		else {
+			table_desc->next = list_head->next;
+
+			while (table_desc->next->next) {
+				table_desc->next = table_desc->next->next;
+			}
+
+			table_desc->next->next = table_desc;
+			table_desc->prev = table_desc->next;
+			table_desc->next = NULL;
+		}
+	}
+
+	/* Finish initialization of the table descriptor */
+
+	table_desc->type                = (u8) table_type;
+	table_desc->pointer             = table_info->pointer;
+	table_desc->length              = table_info->length;
+	table_desc->allocation          = table_info->allocation;
+	table_desc->aml_start           = (u8 *) (table_desc->pointer + 1),
+	table_desc->aml_length          = (u32) (table_desc->length -
+			 (u32) sizeof (struct acpi_table_header));
+	table_desc->table_id            = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_TABLE);
+	table_desc->loaded_into_namespace = FALSE;
+
+	/*
+	 * Set the appropriate global pointer (if there is one) to point to the
+	 * newly installed table
+	 */
+	if (acpi_gbl_table_data[table_type].global_ptr) {
+		*(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer;
+	}
+
+	/* Return Data */
+
+	table_info->table_id        = table_desc->table_id;
+	table_info->installed_desc  = table_desc;
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_all_tables
+ *
+ * PARAMETERS:  None.
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Delete all internal ACPI tables
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_delete_all_tables (void)
+{
+	acpi_table_type                 type;
+
+
+	/*
+	 * Free memory allocated for ACPI tables
+	 * Memory can either be mapped or allocated
+	 */
+	for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) {
+		acpi_tb_delete_tables_by_type (type);
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_tables_by_type
+ *
+ * PARAMETERS:  Type                - The table type to be deleted
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Delete an internal ACPI table
+ *              Locks the ACPI table mutex
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_delete_tables_by_type (
+	acpi_table_type                 type)
+{
+	struct acpi_table_desc          *table_desc;
+	u32                             count;
+	u32                             i;
+
+
+	ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type);
+
+
+	if (type > ACPI_TABLE_MAX) {
+		return_VOID;
+	}
+
+	if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) {
+		return;
+	}
+
+	/* Clear the appropriate "typed" global table pointer */
+
+	switch (type) {
+	case ACPI_TABLE_RSDP:
+		acpi_gbl_RSDP = NULL;
+		break;
+
+	case ACPI_TABLE_DSDT:
+		acpi_gbl_DSDT = NULL;
+		break;
+
+	case ACPI_TABLE_FADT:
+		acpi_gbl_FADT = NULL;
+		break;
+
+	case ACPI_TABLE_FACS:
+		acpi_gbl_FACS = NULL;
+		break;
+
+	case ACPI_TABLE_XSDT:
+		acpi_gbl_XSDT = NULL;
+		break;
+
+	case ACPI_TABLE_SSDT:
+	case ACPI_TABLE_PSDT:
+	default:
+		break;
+	}
+
+	/*
+	 * Free the table
+	 * 1) Get the head of the list
+	 */
+	table_desc = acpi_gbl_table_lists[type].next;
+	count     = acpi_gbl_table_lists[type].count;
+
+	/*
+	 * 2) Walk the entire list, deleting both the allocated tables
+	 *    and the table descriptors
+	 */
+	for (i = 0; i < count; i++) {
+		table_desc = acpi_tb_uninstall_table (table_desc);
+	}
+
+	(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
+	return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_single_table
+ *
+ * PARAMETERS:  table_info          - A table info struct
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Low-level free for a single ACPI table.  Handles cases where
+ *              the table was allocated a buffer or was mapped.
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_delete_single_table (
+	struct acpi_table_desc          *table_desc)
+{
+
+	/* Must have a valid table descriptor and pointer */
+
+	if ((!table_desc) ||
+		 (!table_desc->pointer)) {
+		return;
+	}
+
+	/* Valid table, determine type of memory allocation */
+
+	switch (table_desc->allocation) {
+	case ACPI_MEM_NOT_ALLOCATED:
+		break;
+
+	case ACPI_MEM_ALLOCATED:
+
+		ACPI_MEM_FREE (table_desc->pointer);
+		break;
+
+	case ACPI_MEM_MAPPED:
+
+		acpi_os_unmap_memory (table_desc->pointer, table_desc->length);
+		break;
+
+	default:
+		break;
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_uninstall_table
+ *
+ * PARAMETERS:  table_info          - A table info struct
+ *
+ * RETURN:      Pointer to the next table in the list (of same type)
+ *
+ * DESCRIPTION: Free the memory associated with an internal ACPI table that
+ *              is either installed or has never been installed.
+ *              Table mutex should be locked.
+ *
+ ******************************************************************************/
+
+struct acpi_table_desc *
+acpi_tb_uninstall_table (
+	struct acpi_table_desc          *table_desc)
+{
+	struct acpi_table_desc          *next_desc;
+
+
+	ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc);
+
+
+	if (!table_desc) {
+		return_PTR (NULL);
+	}
+
+	/* Unlink the descriptor from the doubly linked list */
+
+	if (table_desc->prev) {
+		table_desc->prev->next = table_desc->next;
+	}
+	else {
+		/* Is first on list, update list head */
+
+		acpi_gbl_table_lists[table_desc->type].next = table_desc->next;
+	}
+
+	if (table_desc->next) {
+		table_desc->next->prev = table_desc->prev;
+	}
+
+	/* Free the memory allocated for the table itself */
+
+	acpi_tb_delete_single_table (table_desc);
+
+	/* Free the table descriptor */
+
+	next_desc = table_desc->next;
+	ACPI_MEM_FREE (table_desc);
+
+	/* Return pointer to the next descriptor */
+
+	return_PTR (next_desc);
+}
+
+
diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c
new file mode 100644
index 00000000000..9c6913238d5
--- /dev/null
+++ b/drivers/acpi/tables/tbrsdt.c
@@ -0,0 +1,324 @@
+/******************************************************************************
+ *
+ * Module Name: tbrsdt - ACPI RSDT table utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbrsdt")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_verify_rsdp
+ *
+ * PARAMETERS:  Address         - RSDP (Pointer to RSDT)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_verify_rsdp (
+	struct acpi_pointer             *address)
+{
+	struct acpi_table_desc          table_info;
+	acpi_status                     status;
+	struct rsdp_descriptor          *rsdp;
+
+
+	ACPI_FUNCTION_TRACE ("tb_verify_rsdp");
+
+
+	switch (address->pointer_type) {
+	case ACPI_LOGICAL_POINTER:
+
+		rsdp = address->pointer.logical;
+		break;
+
+	case ACPI_PHYSICAL_POINTER:
+		/*
+		 * Obtain access to the RSDP structure
+		 */
+		status = acpi_os_map_memory (address->pointer.physical, sizeof (struct rsdp_descriptor),
+				  (void *) &rsdp);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 *  The signature and checksum must both be correct
+	 */
+	if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+		/* Nope, BAD Signature */
+
+		status = AE_BAD_SIGNATURE;
+		goto cleanup;
+	}
+
+	/* Check the standard checksum */
+
+	if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
+		status = AE_BAD_CHECKSUM;
+		goto cleanup;
+	}
+
+	/* Check extended checksum if table version >= 2 */
+
+	if (rsdp->revision >= 2) {
+		if (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) {
+			status = AE_BAD_CHECKSUM;
+			goto cleanup;
+		}
+	}
+
+	/* The RSDP supplied is OK */
+
+	table_info.pointer     = ACPI_CAST_PTR (struct acpi_table_header, rsdp);
+	table_info.length      = sizeof (struct rsdp_descriptor);
+	table_info.allocation  = ACPI_MEM_MAPPED;
+
+	/* Save the table pointers and allocation info */
+
+	status = acpi_tb_init_table_descriptor (ACPI_TABLE_RSDP, &table_info);
+	if (ACPI_FAILURE (status)) {
+		goto cleanup;
+	}
+
+	/* Save the RSDP in a global for easy access */
+
+	acpi_gbl_RSDP = ACPI_CAST_PTR (struct rsdp_descriptor, table_info.pointer);
+	return_ACPI_STATUS (status);
+
+
+	/* Error exit */
+cleanup:
+
+	if (acpi_gbl_table_flags & ACPI_PHYSICAL_POINTER) {
+		acpi_os_unmap_memory (rsdp, sizeof (struct rsdp_descriptor));
+	}
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_rsdt_address
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      RSDT physical address
+ *
+ * DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
+ *              version of the RSDP
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_get_rsdt_address (
+	struct acpi_pointer             *out_address)
+{
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	out_address->pointer_type = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING;
+
+	/*
+	 * For RSDP revision 0 or 1, we use the RSDT.
+	 * For RSDP revision 2 (and above), we use the XSDT
+	 */
+	if (acpi_gbl_RSDP->revision < 2) {
+		out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address;
+	}
+	else {
+		out_address->pointer.value = acpi_gbl_RSDP->xsdt_physical_address;
+	}
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_validate_rsdt
+ *
+ * PARAMETERS:  table_ptr       - Addressable pointer to the RSDT.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Validate signature for the RSDT or XSDT
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_validate_rsdt (
+	struct acpi_table_header        *table_ptr)
+{
+	int                             no_match;
+
+
+	ACPI_FUNCTION_NAME ("tb_validate_rsdt");
+
+
+	/*
+	 * For RSDP revision 0 or 1, we use the RSDT.
+	 * For RSDP revision 2 and above, we use the XSDT
+	 */
+	if (acpi_gbl_RSDP->revision < 2) {
+		no_match = ACPI_STRNCMP ((char *) table_ptr, RSDT_SIG,
+				  sizeof (RSDT_SIG) -1);
+	}
+	else {
+		no_match = ACPI_STRNCMP ((char *) table_ptr, XSDT_SIG,
+				  sizeof (XSDT_SIG) -1);
+	}
+
+	if (no_match) {
+		/* Invalid RSDT or XSDT signature */
+
+		ACPI_REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
+
+		ACPI_DUMP_BUFFER (acpi_gbl_RSDP, 20);
+
+		ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
+			"RSDT/XSDT signature at %X (%p) is invalid\n",
+			acpi_gbl_RSDP->rsdt_physical_address,
+			(void *) (acpi_native_uint) acpi_gbl_RSDP->rsdt_physical_address));
+
+		if (acpi_gbl_RSDP->revision < 2) {
+			ACPI_REPORT_ERROR (("Looking for RSDT (RSDP->Rev < 2)\n"))
+		}
+		else {
+			ACPI_REPORT_ERROR (("Looking for XSDT (RSDP->Rev >= 2)\n"))
+		}
+
+		ACPI_DUMP_BUFFER ((char *) table_ptr, 48);
+
+		return (AE_BAD_SIGNATURE);
+	}
+
+	return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table_rsdt
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_table_rsdt (
+	void)
+{
+	struct acpi_table_desc          table_info;
+	acpi_status                     status;
+	struct acpi_pointer             address;
+
+
+	ACPI_FUNCTION_TRACE ("tb_get_table_rsdt");
+
+
+	/* Get the RSDT/XSDT via the RSDP */
+
+	acpi_tb_get_rsdt_address (&address);
+
+	table_info.type = ACPI_TABLE_XSDT;
+	status = acpi_tb_get_table (&address, &table_info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n",
+			acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+		"RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n",
+		acpi_gbl_RSDP,
+		ACPI_FORMAT_UINT64 (address.pointer.value)));
+
+	/* Check the RSDT or XSDT signature */
+
+	status = acpi_tb_validate_rsdt (table_info.pointer);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Get the number of tables defined in the RSDT or XSDT */
+
+	acpi_gbl_rsdt_table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, table_info.pointer);
+
+	/* Convert and/or copy to an XSDT structure */
+
+	status = acpi_tb_convert_to_xsdt (&table_info);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Save the table pointers and allocation info */
+
+	status = acpi_tb_init_table_descriptor (ACPI_TABLE_XSDT, &table_info);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	acpi_gbl_XSDT = ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info.pointer);
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", acpi_gbl_XSDT));
+	return_ACPI_STATUS (status);
+}
+
+
diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c
new file mode 100644
index 00000000000..fede5804c78
--- /dev/null
+++ b/drivers/acpi/tables/tbutils.c
@@ -0,0 +1,240 @@
+/******************************************************************************
+ *
+ * Module Name: tbutils - Table manipulation utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbutils")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_handle_to_object
+ *
+ * PARAMETERS:  table_id            - Id for which the function is searching
+ *              table_desc          - Pointer to return the matching table
+ *                                      descriptor.
+ *
+ * RETURN:      Search the tables to find one with a matching table_id and
+ *              return a pointer to that table descriptor.
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_tb_handle_to_object (
+	u16                             table_id,
+	struct acpi_table_desc          **return_table_desc)
+{
+	u32                             i;
+	struct acpi_table_desc          *table_desc;
+
+
+	ACPI_FUNCTION_NAME ("tb_handle_to_object");
+
+
+	for (i = 0; i < ACPI_TABLE_MAX; i++) {
+		table_desc = acpi_gbl_table_lists[i].next;
+		while (table_desc) {
+			if (table_desc->table_id == table_id) {
+				*return_table_desc = table_desc;
+				return (AE_OK);
+			}
+
+			table_desc = table_desc->next;
+		}
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "table_id=%X does not exist\n", table_id));
+	return (AE_BAD_PARAMETER);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_validate_table_header
+ *
+ * PARAMETERS:  table_header        - Logical pointer to the table
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check an ACPI table header for validity
+ *
+ * NOTE:  Table pointers are validated as follows:
+ *          1) Table pointer must point to valid physical memory
+ *          2) Signature must be 4 ASCII chars, even if we don't recognize the
+ *             name
+ *          3) Table must be readable for length specified in the header
+ *          4) Table checksum must be valid (with the exception of the FACS
+ *              which has no checksum because it contains variable fields)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_validate_table_header (
+	struct acpi_table_header        *table_header)
+{
+	acpi_name                       signature;
+
+
+	ACPI_FUNCTION_NAME ("tb_validate_table_header");
+
+
+	/* Verify that this is a valid address */
+
+	if (!acpi_os_readable (table_header, sizeof (struct acpi_table_header))) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Cannot read table header at %p\n", table_header));
+		return (AE_BAD_ADDRESS);
+	}
+
+	/* Ensure that the signature is 4 ASCII characters */
+
+	ACPI_MOVE_32_TO_32 (&signature, table_header->signature);
+	if (!acpi_ut_valid_acpi_name (signature)) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Table signature at %p [%p] has invalid characters\n",
+			table_header, &signature));
+
+		ACPI_REPORT_WARNING (("Invalid table signature found: [%4.4s]\n",
+			(char *) &signature));
+		ACPI_DUMP_BUFFER (table_header, sizeof (struct acpi_table_header));
+		return (AE_BAD_SIGNATURE);
+	}
+
+	/* Validate the table length */
+
+	if (table_header->length < sizeof (struct acpi_table_header)) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Invalid length in table header %p name %4.4s\n",
+			table_header, (char *) &signature));
+
+		ACPI_REPORT_WARNING (("Invalid table header length (0x%X) found\n",
+			(u32) table_header->length));
+		ACPI_DUMP_BUFFER (table_header, sizeof (struct acpi_table_header));
+		return (AE_BAD_HEADER);
+	}
+
+	return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_verify_table_checksum
+ *
+ * PARAMETERS:  *table_header           - ACPI table to verify
+ *
+ * RETURN:      8 bit checksum of table
+ *
+ * DESCRIPTION: Does an 8 bit checksum of table and returns status.  A correct
+ *              table should have a checksum of 0.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_verify_table_checksum (
+	struct acpi_table_header        *table_header)
+{
+	u8                              checksum;
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("tb_verify_table_checksum");
+
+
+	/* Compute the checksum on the table */
+
+	checksum = acpi_tb_checksum (table_header, table_header->length);
+
+	/* Return the appropriate exception */
+
+	if (checksum) {
+		ACPI_REPORT_WARNING (("Invalid checksum in table [%4.4s] (%02X, sum %02X is not zero)\n",
+			table_header->signature, (u32) table_header->checksum, (u32) checksum));
+
+		status = AE_BAD_CHECKSUM;
+	}
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_checksum
+ *
+ * PARAMETERS:  Buffer              - Buffer to checksum
+ *              Length              - Size of the buffer
+ *
+ * RETURNS      8 bit checksum of buffer
+ *
+ * DESCRIPTION: Computes an 8 bit checksum of the buffer(length) and returns it.
+ *
+ ******************************************************************************/
+
+u8
+acpi_tb_checksum (
+	void                            *buffer,
+	u32                             length)
+{
+	const u8                        *limit;
+	const u8                        *rover;
+	u8                              sum = 0;
+
+
+	if (buffer && length) {
+		/*  Buffer and Length are valid   */
+
+		limit = (u8 *) buffer + length;
+
+		for (rover = buffer; rover < limit; rover++) {
+			sum = (u8) (sum + *rover);
+		}
+	}
+	return (sum);
+}
+
+
diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
new file mode 100644
index 00000000000..7715043461c
--- /dev/null
+++ b/drivers/acpi/tables/tbxface.c
@@ -0,0 +1,448 @@
+/******************************************************************************
+ *
+ * Module Name: tbxface - Public interfaces to the ACPI subsystem
+ *                         ACPI table oriented interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbxface")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_load_tables
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to load the ACPI tables from the
+ *              provided RSDT
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_load_tables (void)
+{
+	struct acpi_pointer             rsdp_address;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_load_tables");
+
+
+	/* Get the RSDP */
+
+	status = acpi_os_get_root_pointer (ACPI_LOGICAL_ADDRESSING,
+			  &rsdp_address);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("acpi_load_tables: Could not get RSDP, %s\n",
+				  acpi_format_exception (status)));
+		goto error_exit;
+	}
+
+	/* Map and validate the RSDP */
+
+	acpi_gbl_table_flags = rsdp_address.pointer_type;
+
+	status = acpi_tb_verify_rsdp (&rsdp_address);
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("acpi_load_tables: RSDP Failed validation: %s\n",
+				  acpi_format_exception (status)));
+		goto error_exit;
+	}
+
+	/* Get the RSDT via the RSDP */
+
+	status = acpi_tb_get_table_rsdt ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("acpi_load_tables: Could not load RSDT: %s\n",
+				  acpi_format_exception (status)));
+		goto error_exit;
+	}
+
+	/* Now get the tables needed by this subsystem (FADT, DSDT, etc.) */
+
+	status = acpi_tb_get_required_tables ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("acpi_load_tables: Error getting required tables (DSDT/FADT/FACS): %s\n",
+				  acpi_format_exception (status)));
+		goto error_exit;
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
+
+
+	/* Load the namespace from the tables */
+
+	status = acpi_ns_load_namespace ();
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("acpi_load_tables: Could not load namespace: %s\n",
+				  acpi_format_exception (status)));
+		goto error_exit;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+
+
+error_exit:
+	ACPI_REPORT_ERROR (("acpi_load_tables: Could not load tables: %s\n",
+			  acpi_format_exception (status)));
+
+	return_ACPI_STATUS (status);
+}
+
+
+#ifdef ACPI_FUTURE_USAGE
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_load_table
+ *
+ * PARAMETERS:  table_ptr       - pointer to a buffer containing the entire
+ *                                table to be loaded
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to load a table from the caller's
+ *              buffer.  The buffer must contain an entire ACPI Table including
+ *              a valid header.  The header fields will be verified, and if it
+ *              is determined that the table is invalid, the call will fail.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_load_table (
+	struct acpi_table_header        *table_ptr)
+{
+	acpi_status                     status;
+	struct acpi_table_desc          table_info;
+	struct acpi_pointer             address;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_load_table");
+
+
+	if (!table_ptr) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Copy the table to a local buffer */
+
+	address.pointer_type    = ACPI_LOGICAL_POINTER | ACPI_LOGICAL_ADDRESSING;
+	address.pointer.logical = table_ptr;
+
+	status = acpi_tb_get_table_body (&address, table_ptr, &table_info);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Install the new table into the local data structures */
+
+	status = acpi_tb_install_table (&table_info);
+	if (ACPI_FAILURE (status)) {
+		/* Free table allocated by acpi_tb_get_table_body */
+
+		acpi_tb_delete_single_table (&table_info);
+		return_ACPI_STATUS (status);
+	}
+
+	/* Convert the table to common format if necessary */
+
+	switch (table_info.type) {
+	case ACPI_TABLE_FADT:
+
+		status = acpi_tb_convert_table_fadt ();
+		break;
+
+	case ACPI_TABLE_FACS:
+
+		status = acpi_tb_build_common_facs (&table_info);
+		break;
+
+	default:
+		/* Load table into namespace if it contains executable AML */
+
+		status = acpi_ns_load_table (table_info.installed_desc, acpi_gbl_root_node);
+		break;
+	}
+
+	if (ACPI_FAILURE (status)) {
+		/* Uninstall table and free the buffer */
+
+		(void) acpi_tb_uninstall_table (table_info.installed_desc);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_unload_table
+ *
+ * PARAMETERS:  table_type    - Type of table to be unloaded
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This routine is used to force the unload of a table
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_unload_table (
+	acpi_table_type                 table_type)
+{
+	struct acpi_table_desc          *table_desc;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_unload_table");
+
+
+	/* Parameter validation */
+
+	if (table_type > ACPI_TABLE_MAX) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+
+	/* Find all tables of the requested type */
+
+	table_desc = acpi_gbl_table_lists[table_type].next;
+	while (table_desc) {
+		/*
+		 * Delete all namespace entries owned by this table.  Note that these
+		 * entries can appear anywhere in the namespace by virtue of the AML
+		 * "Scope" operator.  Thus, we need to track ownership by an ID, not
+		 * simply a position within the hierarchy
+		 */
+		acpi_ns_delete_namespace_by_owner (table_desc->table_id);
+
+		table_desc = table_desc->next;
+	}
+
+	/* Delete (or unmap) all tables of this type */
+
+	acpi_tb_delete_tables_by_type (table_type);
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_table_header
+ *
+ * PARAMETERS:  table_type      - one of the defined table types
+ *              Instance        - the non zero instance of the table, allows
+ *                                support for multiple tables of the same type
+ *                                see acpi_gbl_acpi_table_flag
+ *              out_table_header - pointer to the struct acpi_table_header if successful
+ *
+ * DESCRIPTION: This function is called to get an ACPI table header.  The caller
+ *              supplies an pointer to a data area sufficient to contain an ACPI
+ *              struct acpi_table_header structure.
+ *
+ *              The header contains a length field that can be used to determine
+ *              the size of the buffer needed to contain the entire table.  This
+ *              function is not valid for the RSD PTR table since it does not
+ *              have a standard header and is fixed length.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_table_header (
+	acpi_table_type                 table_type,
+	u32                             instance,
+	struct acpi_table_header        *out_table_header)
+{
+	struct acpi_table_header        *tbl_ptr;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_table_header");
+
+
+	if ((instance == 0)                 ||
+		(table_type == ACPI_TABLE_RSDP) ||
+		(!out_table_header)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Check the table type and instance */
+
+	if ((table_type > ACPI_TABLE_MAX)   ||
+		(ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags) &&
+		 instance > 1)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+
+	/* Get a pointer to the entire table */
+
+	status = acpi_tb_get_table_ptr (table_type, instance, &tbl_ptr);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * The function will return a NULL pointer if the table is not loaded
+	 */
+	if (tbl_ptr == NULL) {
+		return_ACPI_STATUS (AE_NOT_EXIST);
+	}
+
+	/*
+	 * Copy the header to the caller's buffer
+	 */
+	ACPI_MEMCPY ((void *) out_table_header, (void *) tbl_ptr,
+			 sizeof (struct acpi_table_header));
+
+	return_ACPI_STATUS (status);
+}
+
+
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_table
+ *
+ * PARAMETERS:  table_type      - one of the defined table types
+ *              Instance        - the non zero instance of the table, allows
+ *                                support for multiple tables of the same type
+ *                                see acpi_gbl_acpi_table_flag
+ *              ret_buffer      - pointer to a structure containing a buffer to
+ *                                receive the table
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to get an ACPI table.  The caller
+ *              supplies an out_buffer large enough to contain the entire ACPI
+ *              table.  The caller should call the acpi_get_table_header function
+ *              first to determine the buffer size needed.  Upon completion
+ *              the out_buffer->Length field will indicate the number of bytes
+ *              copied into the out_buffer->buf_ptr buffer. This table will be
+ *              a complete table including the header.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_table (
+	acpi_table_type                 table_type,
+	u32                             instance,
+	struct acpi_buffer              *ret_buffer)
+{
+	struct acpi_table_header        *tbl_ptr;
+	acpi_status                     status;
+	acpi_size                       table_length;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_table");
+
+
+	/* Parameter validation */
+
+	if (instance == 0) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_validate_buffer (ret_buffer);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Check the table type and instance */
+
+	if ((table_type > ACPI_TABLE_MAX)   ||
+		(ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags) &&
+		 instance > 1)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+
+	/* Get a pointer to the entire table */
+
+	status = acpi_tb_get_table_ptr (table_type, instance, &tbl_ptr);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * acpi_tb_get_table_ptr will return a NULL pointer if the
+	 * table is not loaded.
+	 */
+	if (tbl_ptr == NULL) {
+		return_ACPI_STATUS (AE_NOT_EXIST);
+	}
+
+	/* Get the table length */
+
+	if (table_type == ACPI_TABLE_RSDP) {
+		/*
+		 *  RSD PTR is the only "table" without a header
+		 */
+		table_length = sizeof (struct rsdp_descriptor);
+	}
+	else {
+		table_length = (acpi_size) tbl_ptr->length;
+	}
+
+	/* Validate/Allocate/Clear caller buffer */
+
+	status = acpi_ut_initialize_buffer (ret_buffer, table_length);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Copy the table to the buffer */
+
+	ACPI_MEMCPY ((void *) ret_buffer->pointer, (void *) tbl_ptr, table_length);
+	return_ACPI_STATUS (AE_OK);
+}
+EXPORT_SYMBOL(acpi_get_table);
+
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
new file mode 100644
index 00000000000..6e8072ebbac
--- /dev/null
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -0,0 +1,606 @@
+/******************************************************************************
+ *
+ * Module Name: tbxfroot - Find the root ACPI table (RSDT)
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+	 ACPI_MODULE_NAME    ("tbxfroot")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_find_table
+ *
+ * PARAMETERS:  Signature           - String with ACPI table signature
+ *              oem_id              - String with the table OEM ID
+ *              oem_table_id        - String with the OEM Table ID.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
+ *              Signature, OEM ID and OEM Table ID.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_find_table (
+	char                            *signature,
+	char                            *oem_id,
+	char                            *oem_table_id,
+	struct acpi_table_header        **table_ptr)
+{
+	acpi_status                     status;
+	struct acpi_table_header        *table;
+
+
+	ACPI_FUNCTION_TRACE ("tb_find_table");
+
+
+	/* Validate string lengths */
+
+	if ((ACPI_STRLEN (signature)  > ACPI_NAME_SIZE) ||
+		(ACPI_STRLEN (oem_id)     > sizeof (table->oem_id)) ||
+		(ACPI_STRLEN (oem_table_id) > sizeof (table->oem_table_id))) {
+		return_ACPI_STATUS (AE_AML_STRING_LIMIT);
+	}
+
+	if (!ACPI_STRNCMP (signature, DSDT_SIG, ACPI_NAME_SIZE)) {
+		/*
+		 * The DSDT pointer is contained in the FADT, not the RSDT.
+		 * This code should suffice, because the only code that would perform
+		 * a "find" on the DSDT is the data_table_region() AML opcode -- in
+		 * which case, the DSDT is guaranteed to be already loaded.
+		 * If this becomes insufficient, the FADT will have to be found first.
+		 */
+		if (!acpi_gbl_DSDT) {
+			return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+		}
+
+		table = acpi_gbl_DSDT;
+	}
+	else {
+		/* Find the table */
+
+		status = acpi_get_firmware_table (signature, 1,
+				   ACPI_LOGICAL_ADDRESSING, &table);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Check oem_id and oem_table_id */
+
+	if ((oem_id[0]     && ACPI_STRNCMP (
+			 oem_id, table->oem_id, sizeof (table->oem_id))) ||
+		(oem_table_id[0] && ACPI_STRNCMP (
+				   oem_table_id, table->oem_table_id, sizeof (table->oem_table_id)))) {
+		return_ACPI_STATUS (AE_AML_NAME_NOT_FOUND);
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n", table->signature));
+	*table_ptr = table;
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_firmware_table
+ *
+ * PARAMETERS:  Signature       - Any ACPI table signature
+ *              Instance        - the non zero instance of the table, allows
+ *                                support for multiple tables of the same type
+ *              Flags           - Physical/Virtual support
+ *              table_pointer   - Where a buffer containing the table is
+ *                                returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to get an ACPI table. A buffer is
+ *              allocated for the table and returned in table_pointer.
+ *              This table will be a complete table including the header.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_firmware_table (
+	acpi_string                     signature,
+	u32                             instance,
+	u32                             flags,
+	struct acpi_table_header        **table_pointer)
+{
+	acpi_status                     status;
+	struct acpi_pointer             address;
+	struct acpi_table_header        *header = NULL;
+	struct acpi_table_desc          *table_info = NULL;
+	struct acpi_table_desc          *rsdt_info;
+	u32                             table_count;
+	u32                             i;
+	u32                             j;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_firmware_table");
+
+
+	/*
+	 * Ensure that at least the table manager is initialized.  We don't
+	 * require that the entire ACPI subsystem is up for this interface.
+	 * If we have a buffer, we must have a length too
+	 */
+	if ((instance == 0)     ||
+		(!signature)        ||
+		(!table_pointer)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Ensure that we have a RSDP */
+
+	if (!acpi_gbl_RSDP) {
+		/* Get the RSDP */
+
+		status = acpi_os_get_root_pointer (flags, &address);
+		if (ACPI_FAILURE (status)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP not found\n"));
+			return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+		}
+
+		/* Map and validate the RSDP */
+
+		if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
+			status = acpi_os_map_memory (address.pointer.physical, sizeof (struct rsdp_descriptor),
+					  (void *) &acpi_gbl_RSDP);
+			if (ACPI_FAILURE (status)) {
+				return_ACPI_STATUS (status);
+			}
+		}
+		else {
+			acpi_gbl_RSDP = address.pointer.logical;
+		}
+
+		/* The signature and checksum must both be correct */
+
+		if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+			/* Nope, BAD Signature */
+
+			return_ACPI_STATUS (AE_BAD_SIGNATURE);
+		}
+
+		if (acpi_tb_checksum (acpi_gbl_RSDP, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
+			/* Nope, BAD Checksum */
+
+			return_ACPI_STATUS (AE_BAD_CHECKSUM);
+		}
+	}
+
+	/* Get the RSDT address via the RSDP */
+
+	acpi_tb_get_rsdt_address (&address);
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+		"RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
+		acpi_gbl_RSDP,
+		ACPI_FORMAT_UINT64 (address.pointer.value)));
+
+	/* Insert processor_mode flags */
+
+	address.pointer_type |= flags;
+
+	/* Get and validate the RSDT */
+
+	rsdt_info = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
+	if (!rsdt_info) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	status = acpi_tb_get_table (&address, rsdt_info);
+	if (ACPI_FAILURE (status)) {
+		goto cleanup;
+	}
+
+	status = acpi_tb_validate_rsdt (rsdt_info->pointer);
+	if (ACPI_FAILURE (status)) {
+		goto cleanup;
+	}
+
+	/* Allocate a scratch table header and table descriptor */
+
+	header = ACPI_MEM_ALLOCATE (sizeof (struct acpi_table_header));
+	if (!header) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	table_info = ACPI_MEM_ALLOCATE (sizeof (struct acpi_table_desc));
+	if (!table_info) {
+		status = AE_NO_MEMORY;
+		goto cleanup;
+	}
+
+	/* Get the number of table pointers within the RSDT */
+
+	table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, rsdt_info->pointer);
+	address.pointer_type = acpi_gbl_table_flags | flags;
+
+	/*
+	 * Search the RSDT/XSDT for the correct instance of the
+	 * requested table
+	 */
+	for (i = 0, j = 0; i < table_count; i++) {
+		/* Get the next table pointer, handle RSDT vs. XSDT */
+
+		if (acpi_gbl_RSDP->revision < 2) {
+			address.pointer.value = (ACPI_CAST_PTR (
+				RSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
+		}
+		else {
+			address.pointer.value = (ACPI_CAST_PTR (
+				XSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
+		}
+
+		/* Get the table header */
+
+		status = acpi_tb_get_table_header (&address, header);
+		if (ACPI_FAILURE (status)) {
+			goto cleanup;
+		}
+
+		/* Compare table signatures and table instance */
+
+		if (!ACPI_STRNCMP (header->signature, signature, ACPI_NAME_SIZE)) {
+			/* An instance of the table was found */
+
+			j++;
+			if (j >= instance) {
+				/* Found the correct instance, get the entire table */
+
+				status = acpi_tb_get_table_body (&address, header, table_info);
+				if (ACPI_FAILURE (status)) {
+					goto cleanup;
+				}
+
+				*table_pointer = table_info->pointer;
+				goto cleanup;
+			}
+		}
+	}
+
+	/* Did not find the table */
+
+	status = AE_NOT_EXIST;
+
+
+cleanup:
+	acpi_os_unmap_memory (rsdt_info->pointer, (acpi_size) rsdt_info->pointer->length);
+	ACPI_MEM_FREE (rsdt_info);
+
+	if (header) {
+		ACPI_MEM_FREE (header);
+	}
+	if (table_info) {
+		ACPI_MEM_FREE (table_info);
+	}
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_firmware_table);
+
+
+/* TBD: Move to a new file */
+
+#if ACPI_MACHINE_WIDTH != 16
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_find_root_pointer
+ *
+ * PARAMETERS:  **rsdp_address          - Where to place the RSDP address
+ *              Flags                   - Logical/Physical addressing
+ *
+ * RETURN:      Status, Physical address of the RSDP
+ *
+ * DESCRIPTION: Find the RSDP
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_find_root_pointer (
+	u32                             flags,
+	struct acpi_pointer             *rsdp_address)
+{
+	struct acpi_table_desc          table_info;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_find_root_pointer");
+
+
+	/* Get the RSDP */
+
+	status = acpi_tb_find_rsdp (&table_info, flags);
+	if (ACPI_FAILURE (status)) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"RSDP structure not found, %s Flags=%X\n",
+			acpi_format_exception (status), flags));
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	rsdp_address->pointer_type = ACPI_PHYSICAL_POINTER;
+	rsdp_address->pointer.physical = table_info.physical_address;
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_scan_memory_for_rsdp
+ *
+ * PARAMETERS:  start_address       - Starting pointer for search
+ *              Length              - Maximum length to search
+ *
+ * RETURN:      Pointer to the RSDP if found, otherwise NULL.
+ *
+ * DESCRIPTION: Search a block of memory for the RSDP signature
+ *
+ ******************************************************************************/
+
+u8 *
+acpi_tb_scan_memory_for_rsdp (
+	u8                              *start_address,
+	u32                             length)
+{
+	u8                              *mem_rover;
+	u8                              *end_address;
+	u8                              checksum;
+
+
+	ACPI_FUNCTION_TRACE ("tb_scan_memory_for_rsdp");
+
+
+	end_address = start_address + length;
+
+	/* Search from given start address for the requested length */
+
+	for (mem_rover = start_address; mem_rover < end_address;
+		 mem_rover += ACPI_RSDP_SCAN_STEP) {
+		/* The signature and checksum must both be correct */
+
+		if (ACPI_STRNCMP ((char *) mem_rover, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+			/* No signature match, keep looking */
+
+			continue;
+		}
+
+		/* Signature matches, check the appropriate checksum */
+
+		if ((ACPI_CAST_PTR (struct rsdp_descriptor, mem_rover))->revision < 2) {
+			/* ACPI version 1.0 */
+
+			checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_CHECKSUM_LENGTH);
+		}
+		else {
+			/* Post ACPI 1.0, use extended_checksum */
+
+			checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_XCHECKSUM_LENGTH);
+		}
+
+		if (checksum == 0) {
+			/* Checksum valid, we have found a valid RSDP */
+
+			ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+				"RSDP located at physical address %p\n", mem_rover));
+			return_PTR (mem_rover);
+		}
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+			"Found an RSDP at physical address %p, but it has a bad checksum\n",
+			mem_rover));
+	}
+
+	/* Searched entire block, no RSDP was found */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+		"Searched entire block, no valid RSDP was found.\n"));
+	return_PTR (NULL);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_find_rsdp
+ *
+ * PARAMETERS:  *table_info             - Where the table info is returned
+ *              Flags                   - Current memory mode (logical vs.
+ *                                        physical addressing)
+ *
+ * RETURN:      Status, RSDP physical address
+ *
+ * DESCRIPTION: search lower 1_mbyte of memory for the root system descriptor
+ *              pointer structure.  If it is found, set *RSDP to point to it.
+ *
+ *              NOTE1: The RSDp must be either in the first 1_k of the Extended
+ *              BIOS Data Area or between E0000 and FFFFF (From ACPI Spec.)
+ *              Only a 32-bit physical address is necessary.
+ *
+ *              NOTE2: This function is always available, regardless of the
+ *              initialization state of the rest of ACPI.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_find_rsdp (
+	struct acpi_table_desc          *table_info,
+	u32                             flags)
+{
+	u8                              *table_ptr;
+	u8                              *mem_rover;
+	u32                             physical_address;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("tb_find_rsdp");
+
+
+	/*
+	 * Scan supports either 1) Logical addressing or 2) Physical addressing
+	 */
+	if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
+		/*
+		 * 1a) Get the location of the EBDA
+		 */
+		status = acpi_os_map_memory ((acpi_physical_address) ACPI_EBDA_PTR_LOCATION,
+				  ACPI_EBDA_PTR_LENGTH,
+				  (void *) &table_ptr);
+		if (ACPI_FAILURE (status)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+				"Could not map memory at %8.8X for length %X\n",
+				ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
+			return_ACPI_STATUS (status);
+		}
+
+		ACPI_MOVE_16_TO_32 (&physical_address, table_ptr);
+		physical_address <<= 4;                 /* Convert segment to physical address */
+		acpi_os_unmap_memory (table_ptr, ACPI_EBDA_PTR_LENGTH);
+
+		/* EBDA present? */
+
+		if (physical_address > 0x400) {
+			/*
+			 * 1b) Search EBDA paragraphs (EBDa is required to be a minimum of 1_k length)
+			 */
+			status = acpi_os_map_memory ((acpi_physical_address) physical_address,
+					  ACPI_EBDA_WINDOW_SIZE,
+					  (void *) &table_ptr);
+			if (ACPI_FAILURE (status)) {
+				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+					"Could not map memory at %8.8X for length %X\n",
+					physical_address, ACPI_EBDA_WINDOW_SIZE));
+				return_ACPI_STATUS (status);
+			}
+
+			mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_EBDA_WINDOW_SIZE);
+			acpi_os_unmap_memory (table_ptr, ACPI_EBDA_WINDOW_SIZE);
+
+			if (mem_rover) {
+				/* Found it, return the physical address */
+
+				physical_address += ACPI_PTR_DIFF (mem_rover, table_ptr);
+
+				table_info->physical_address = (acpi_physical_address) physical_address;
+				return_ACPI_STATUS (AE_OK);
+			}
+		}
+
+		/*
+		 * 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
+		 */
+		status = acpi_os_map_memory ((acpi_physical_address) ACPI_HI_RSDP_WINDOW_BASE,
+				  ACPI_HI_RSDP_WINDOW_SIZE,
+				  (void *) &table_ptr);
+		if (ACPI_FAILURE (status)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+				"Could not map memory at %8.8X for length %X\n",
+				ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
+			return_ACPI_STATUS (status);
+		}
+
+		mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
+		acpi_os_unmap_memory (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
+
+		if (mem_rover) {
+			/* Found it, return the physical address */
+
+			physical_address = ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr);
+
+			table_info->physical_address = (acpi_physical_address) physical_address;
+			return_ACPI_STATUS (AE_OK);
+		}
+	}
+
+	/*
+	 * Physical addressing
+	 */
+	else {
+		/*
+		 * 1a) Get the location of the EBDA
+		 */
+		ACPI_MOVE_16_TO_32 (&physical_address, ACPI_EBDA_PTR_LOCATION);
+		physical_address <<= 4;     /* Convert segment to physical address */
+
+		/* EBDA present? */
+
+		if (physical_address > 0x400) {
+			/*
+			 * 1b) Search EBDA paragraphs (EBDa is required to be a minimum of 1_k length)
+			 */
+			mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (physical_address),
+					  ACPI_EBDA_WINDOW_SIZE);
+			if (mem_rover) {
+				/* Found it, return the physical address */
+
+				table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
+				return_ACPI_STATUS (AE_OK);
+			}
+		}
+
+		/*
+		 * 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
+		 */
+		mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (ACPI_HI_RSDP_WINDOW_BASE),
+				  ACPI_HI_RSDP_WINDOW_SIZE);
+		if (mem_rover) {
+			/* Found it, return the physical address */
+
+			table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
+			return_ACPI_STATUS (AE_OK);
+		}
+	}
+
+	/* RSDP signature was not found */
+
+	return_ACPI_STATUS (AE_NOT_FOUND);
+}
+
+#endif
+