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!

6 files changed, 2318 insertions, 0 deletions

diff --git a/drivers/acpi/hardware/Makefile b/drivers/acpi/hardware/Makefile
new file mode 100644
index 00000000000..438ad373b9a
--- /dev/null
+++ b/drivers/acpi/hardware/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for all Linux ACPI interpreter subdirectories
+#
+
+obj-y := hwacpi.o  hwgpe.o  hwregs.o  hwsleep.o
+
+obj-$(ACPI_FUTURE_USAGE) += hwtimer.o
+
+EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/hardware/hwacpi.c b/drivers/acpi/hardware/hwacpi.c
new file mode 100644
index 00000000000..529e922bdc8
--- /dev/null
+++ b/drivers/acpi/hardware/hwacpi.c
@@ -0,0 +1,230 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface
+ *
+ *****************************************************************************/
+
+/*
+ * 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>
+
+
+#define _COMPONENT          ACPI_HARDWARE
+	 ACPI_MODULE_NAME    ("hwacpi")
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_initialize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize and validate various ACPI registers
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_initialize (
+	void)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_initialize");
+
+
+	/* We must have the ACPI tables by the time we get here */
+
+	if (!acpi_gbl_FADT) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "A FADT is not loaded\n"));
+
+		return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+	}
+
+	/* Sanity check the FADT for valid values */
+
+	status = acpi_ut_validate_fadt ();
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_set_mode
+ *
+ * PARAMETERS:  Mode            - SYS_MODE_ACPI or SYS_MODE_LEGACY
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transitions the system into the requested mode.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_set_mode (
+	u32                             mode)
+{
+
+	acpi_status                     status;
+	u32                             retry;
+
+
+	ACPI_FUNCTION_TRACE ("hw_set_mode");
+
+	/*
+	 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+	 * system does not support mode transition.
+	 */
+	if (!acpi_gbl_FADT->smi_cmd) {
+		ACPI_REPORT_ERROR (("No SMI_CMD in FADT, mode transition failed.\n"));
+		return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+	}
+
+	/*
+	 * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE
+	 * in FADT: If it is zero, enabling or disabling is not supported.
+	 * As old systems may have used zero for mode transition,
+	 * we make sure both the numbers are zero to determine these
+	 * transitions are not supported.
+	 */
+	if (!acpi_gbl_FADT->acpi_enable && !acpi_gbl_FADT->acpi_disable) {
+		ACPI_REPORT_ERROR (("No ACPI mode transition supported in this system (enable/disable both zero)\n"));
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	switch (mode) {
+	case ACPI_SYS_MODE_ACPI:
+
+		/* BIOS should have disabled ALL fixed and GP events */
+
+		status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd,
+				  (u32) acpi_gbl_FADT->acpi_enable, 8);
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n"));
+		break;
+
+	case ACPI_SYS_MODE_LEGACY:
+
+		/*
+		 * BIOS should clear all fixed status bits and restore fixed event
+		 * enable bits to default
+		 */
+		status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd,
+				 (u32) acpi_gbl_FADT->acpi_disable, 8);
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+				 "Attempting to enable Legacy (non-ACPI) mode\n"));
+		break;
+
+	default:
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	if (ACPI_FAILURE (status)) {
+		ACPI_REPORT_ERROR (("Could not write mode change, %s\n", acpi_format_exception (status)));
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * Some hardware takes a LONG time to switch modes. Give them 3 sec to
+	 * do so, but allow faster systems to proceed more quickly.
+	 */
+	retry = 3000;
+	while (retry) {
+		if (acpi_hw_get_mode() == mode) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", mode));
+			return_ACPI_STATUS (AE_OK);
+		}
+		acpi_os_stall(1000);
+		retry--;
+	}
+
+	ACPI_REPORT_ERROR (("Hardware never changed modes\n"));
+	return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_get_mode
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      SYS_MODE_ACPI or SYS_MODE_LEGACY
+ *
+ * DESCRIPTION: Return current operating state of system.  Determined by
+ *              querying the SCI_EN bit.
+ *
+ ******************************************************************************/
+
+u32
+acpi_hw_get_mode (void)
+{
+	acpi_status                     status;
+	u32                             value;
+
+
+	ACPI_FUNCTION_TRACE ("hw_get_mode");
+
+
+	/*
+	 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+	 * system does not support mode transition.
+	 */
+	if (!acpi_gbl_FADT->smi_cmd) {
+		return_VALUE (ACPI_SYS_MODE_ACPI);
+	}
+
+	status = acpi_get_register (ACPI_BITREG_SCI_ENABLE, &value, ACPI_MTX_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_VALUE (ACPI_SYS_MODE_LEGACY);
+	}
+
+	if (value) {
+		return_VALUE (ACPI_SYS_MODE_ACPI);
+	}
+	else {
+		return_VALUE (ACPI_SYS_MODE_LEGACY);
+	}
+}
diff --git a/drivers/acpi/hardware/hwgpe.c b/drivers/acpi/hardware/hwgpe.c
new file mode 100644
index 00000000000..9ac1d639bf5
--- /dev/null
+++ b/drivers/acpi/hardware/hwgpe.c
@@ -0,0 +1,444 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwgpe - Low level GPE enable/disable/clear functions
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acevents.h>
+
+#define _COMPONENT          ACPI_HARDWARE
+	 ACPI_MODULE_NAME    ("hwgpe")
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_write_gpe_enable_reg
+ *
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be enabled
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write a GPE enable register.  Note: The bit for this GPE must
+ *              already be cleared or set in the parent register
+ *              enable_for_run mask.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_write_gpe_enable_reg (
+	struct acpi_gpe_event_info      *gpe_event_info)
+{
+	struct acpi_gpe_register_info   *gpe_register_info;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/* Get the info block for the entire GPE register */
+
+	gpe_register_info = gpe_event_info->register_info;
+	if (!gpe_register_info) {
+		return (AE_NOT_EXIST);
+	}
+
+	/* Write the entire GPE (runtime) enable register */
+
+	status = acpi_hw_low_level_write (8, gpe_register_info->enable_for_run,
+			  &gpe_register_info->enable_address);
+
+	return (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_clear_gpe
+ *
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be cleared
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear the status bit for a single GPE.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_clear_gpe (
+	struct acpi_gpe_event_info      *gpe_event_info)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/*
+	 * Write a one to the appropriate bit in the status register to
+	 * clear this GPE.
+	 */
+	status = acpi_hw_low_level_write (8, gpe_event_info->register_bit,
+			  &gpe_event_info->register_info->status_address);
+
+	return (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_get_gpe_status
+ *
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to queried
+ *              event_status        - Where the GPE status is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the status of a single GPE.
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_hw_get_gpe_status (
+	struct acpi_gpe_event_info      *gpe_event_info,
+	acpi_event_status               *event_status)
+{
+	u32                             in_byte;
+	u8                              register_bit;
+	struct acpi_gpe_register_info   *gpe_register_info;
+	acpi_status                     status;
+	acpi_event_status               local_event_status = 0;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	if (!event_status) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Get the info block for the entire GPE register */
+
+	gpe_register_info = gpe_event_info->register_info;
+
+	/* Get the register bitmask for this GPE */
+
+	register_bit = gpe_event_info->register_bit;
+
+	/* GPE currently enabled? (enabled for runtime?) */
+
+	if (register_bit & gpe_register_info->enable_for_run) {
+		local_event_status |= ACPI_EVENT_FLAG_ENABLED;
+	}
+
+	/* GPE enabled for wake? */
+
+	if (register_bit & gpe_register_info->enable_for_wake) {
+		local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
+	}
+
+	/* GPE currently active (status bit == 1)? */
+
+	status = acpi_hw_low_level_read (8, &in_byte, &gpe_register_info->status_address);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	if (register_bit & in_byte) {
+		local_event_status |= ACPI_EVENT_FLAG_SET;
+	}
+
+	/* Set return value */
+
+	(*event_status) = local_event_status;
+
+
+unlock_and_exit:
+	return (status);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_disable_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable all GPEs within a GPE block
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_disable_gpe_block (
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
+	struct acpi_gpe_block_info      *gpe_block)
+{
+	u32                             i;
+	acpi_status                     status;
+
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+		/* Disable all GPEs in this register */
+
+		status = acpi_hw_low_level_write (8, 0x00,
+				 &gpe_block->register_info[i].enable_address);
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_clear_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear status bits for all GPEs within a GPE block
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_clear_gpe_block (
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
+	struct acpi_gpe_block_info      *gpe_block)
+{
+	u32                             i;
+	acpi_status                     status;
+
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+		/* Clear status on all GPEs in this register */
+
+		status = acpi_hw_low_level_write (8, 0xFF,
+				 &gpe_block->register_info[i].status_address);
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_runtime_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "runtime" GPEs within a GPE block. (Includes
+ *              combination wake/run GPEs.)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_enable_runtime_gpe_block (
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
+	struct acpi_gpe_block_info      *gpe_block)
+{
+	u32                             i;
+	acpi_status                     status;
+
+
+	/* NOTE: assumes that all GPEs are currently disabled */
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+		if (!gpe_block->register_info[i].enable_for_run) {
+			continue;
+		}
+
+		/* Enable all "runtime" GPEs in this register */
+
+		status = acpi_hw_low_level_write (8, gpe_block->register_info[i].enable_for_run,
+				 &gpe_block->register_info[i].enable_address);
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_wakeup_gpe_block
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all "wake" GPEs within a GPE block.  (Includes
+ *              combination wake/run GPEs.)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_enable_wakeup_gpe_block (
+	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
+	struct acpi_gpe_block_info      *gpe_block)
+{
+	u32                             i;
+	acpi_status                     status;
+
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+		if (!gpe_block->register_info[i].enable_for_wake) {
+			continue;
+		}
+
+		/* Enable all "wake" GPEs in this register */
+
+		status = acpi_hw_low_level_write (8, gpe_block->register_info[i].enable_for_wake,
+				 &gpe_block->register_info[i].enable_address);
+		if (ACPI_FAILURE (status)) {
+			return (status);
+		}
+	}
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_disable_all_gpes
+ *
+ * PARAMETERS:  Flags           - ACPI_NOT_ISR or ACPI_ISR
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable and clear all GPEs
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_disable_all_gpes (
+	u32                             flags)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_disable_all_gpes");
+
+
+	status = acpi_ev_walk_gpe_list (acpi_hw_disable_gpe_block, flags);
+	status = acpi_ev_walk_gpe_list (acpi_hw_clear_gpe_block, flags);
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_all_runtime_gpes
+ *
+ * PARAMETERS:  Flags           - ACPI_NOT_ISR or ACPI_ISR
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all GPEs of the given type
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_enable_all_runtime_gpes (
+	u32                             flags)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_enable_all_runtime_gpes");
+
+
+	status = acpi_ev_walk_gpe_list (acpi_hw_enable_runtime_gpe_block, flags);
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_enable_all_wakeup_gpes
+ *
+ * PARAMETERS:  Flags           - ACPI_NOT_ISR or ACPI_ISR
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable all GPEs of the given type
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_enable_all_wakeup_gpes (
+	u32                             flags)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_enable_all_wakeup_gpes");
+
+
+	status = acpi_ev_walk_gpe_list (acpi_hw_enable_wakeup_gpe_block, flags);
+	return_ACPI_STATUS (status);
+}
+
diff --git a/drivers/acpi/hardware/hwregs.c b/drivers/acpi/hardware/hwregs.c
new file mode 100644
index 00000000000..91af0c2ddcf
--- /dev/null
+++ b/drivers/acpi/hardware/hwregs.c
@@ -0,0 +1,850 @@
+
+/*******************************************************************************
+ *
+ * Module Name: hwregs - Read/write access functions for the various ACPI
+ *                       control and status registers.
+ *
+ ******************************************************************************/
+
+/*
+ * 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/acevents.h>
+
+#define _COMPONENT          ACPI_HARDWARE
+	 ACPI_MODULE_NAME    ("hwregs")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_clear_acpi_status
+ *
+ * PARAMETERS:  Flags           - Lock the hardware or not
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Clears all fixed and general purpose status bits
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_clear_acpi_status (
+	u32                             flags)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_clear_acpi_status");
+
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %04X\n",
+		ACPI_BITMASK_ALL_FIXED_STATUS,
+		(u16) acpi_gbl_FADT->xpm1a_evt_blk.address));
+
+	if (flags & ACPI_MTX_LOCK) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_HARDWARE);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS,
+			  ACPI_BITMASK_ALL_FIXED_STATUS);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	/* Clear the fixed events */
+
+	if (acpi_gbl_FADT->xpm1b_evt_blk.address) {
+		status = acpi_hw_low_level_write (16, ACPI_BITMASK_ALL_FIXED_STATUS,
+				 &acpi_gbl_FADT->xpm1b_evt_blk);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+	}
+
+	/* Clear the GPE Bits in all GPE registers in all GPE blocks */
+
+	status = acpi_ev_walk_gpe_list (acpi_hw_clear_gpe_block, ACPI_ISR);
+
+unlock_and_exit:
+	if (flags & ACPI_MTX_LOCK) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_HARDWARE);
+	}
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_sleep_type_data
+ *
+ * PARAMETERS:  sleep_state         - Numeric sleep state
+ *              *sleep_type_a        - Where SLP_TYPa is returned
+ *              *sleep_type_b        - Where SLP_TYPb is returned
+ *
+ * RETURN:      Status - ACPI status
+ *
+ * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
+ *              state.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_sleep_type_data (
+	u8                              sleep_state,
+	u8                              *sleep_type_a,
+	u8                              *sleep_type_b)
+{
+	acpi_status                     status = AE_OK;
+	struct acpi_parameter_info      info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_sleep_type_data");
+
+
+	/*
+	 * Validate parameters
+	 */
+	if ((sleep_state > ACPI_S_STATES_MAX) ||
+		!sleep_type_a || !sleep_type_b) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Evaluate the namespace object containing the values for this state
+	 */
+	info.parameters = NULL;
+	status = acpi_ns_evaluate_by_name ((char *) acpi_gbl_sleep_state_names[sleep_state],
+			  &info);
+	if (ACPI_FAILURE (status)) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s while evaluating sleep_state [%s]\n",
+			acpi_format_exception (status), acpi_gbl_sleep_state_names[sleep_state]));
+
+		return_ACPI_STATUS (status);
+	}
+
+	/* Must have a return object */
+
+	if (!info.return_object) {
+		ACPI_REPORT_ERROR (("Missing Sleep State object\n"));
+		status = AE_NOT_EXIST;
+	}
+
+	/* It must be of type Package */
+
+	else if (ACPI_GET_OBJECT_TYPE (info.return_object) != ACPI_TYPE_PACKAGE) {
+		ACPI_REPORT_ERROR (("Sleep State object not a Package\n"));
+		status = AE_AML_OPERAND_TYPE;
+	}
+
+	/* The package must have at least two elements */
+
+	else if (info.return_object->package.count < 2) {
+		ACPI_REPORT_ERROR (("Sleep State package does not have at least two elements\n"));
+		status = AE_AML_NO_OPERAND;
+	}
+
+	/* The first two elements must both be of type Integer */
+
+	else if ((ACPI_GET_OBJECT_TYPE (info.return_object->package.elements[0]) != ACPI_TYPE_INTEGER) ||
+			 (ACPI_GET_OBJECT_TYPE (info.return_object->package.elements[1]) != ACPI_TYPE_INTEGER)) {
+		ACPI_REPORT_ERROR (("Sleep State package elements are not both Integers (%s, %s)\n",
+			acpi_ut_get_object_type_name (info.return_object->package.elements[0]),
+			acpi_ut_get_object_type_name (info.return_object->package.elements[1])));
+		status = AE_AML_OPERAND_TYPE;
+	}
+	else {
+		/*
+		 * Valid _Sx_ package size, type, and value
+		 */
+		*sleep_type_a = (u8) (info.return_object->package.elements[0])->integer.value;
+		*sleep_type_b = (u8) (info.return_object->package.elements[1])->integer.value;
+	}
+
+	if (ACPI_FAILURE (status)) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"While evaluating sleep_state [%s], bad Sleep object %p type %s\n",
+			acpi_gbl_sleep_state_names[sleep_state], info.return_object,
+			acpi_ut_get_object_type_name (info.return_object)));
+	}
+
+	acpi_ut_remove_reference (info.return_object);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_sleep_type_data);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_get_register_bit_mask
+ *
+ * PARAMETERS:  register_id         - Index of ACPI Register to access
+ *
+ * RETURN:      The bit mask to be used when accessing the register
+ *
+ * DESCRIPTION: Map register_id into a register bit mask.
+ *
+ ******************************************************************************/
+
+struct acpi_bit_register_info *
+acpi_hw_get_bit_register_info (
+	u32                             register_id)
+{
+	ACPI_FUNCTION_NAME ("hw_get_bit_register_info");
+
+
+	if (register_id > ACPI_BITREG_MAX) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid bit_register ID: %X\n", register_id));
+		return (NULL);
+	}
+
+	return (&acpi_gbl_bit_register_info[register_id]);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_register
+ *
+ * PARAMETERS:  register_id     - ID of ACPI bit_register to access
+ *              return_value    - Value that was read from the register
+ *              Flags           - Lock the hardware or not
+ *
+ * RETURN:      Status and the value read from specified Register.  Value
+ *              returned is normalized to bit0 (is shifted all the way right)
+ *
+ * DESCRIPTION: ACPI bit_register read function.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_register (
+	u32                             register_id,
+	u32                             *return_value,
+	u32                             flags)
+{
+	u32                             register_value = 0;
+	struct acpi_bit_register_info   *bit_reg_info;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_register");
+
+
+	/* Get the info structure corresponding to the requested ACPI Register */
+
+	bit_reg_info = acpi_hw_get_bit_register_info (register_id);
+	if (!bit_reg_info) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	if (flags & ACPI_MTX_LOCK) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_HARDWARE);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Read from the register */
+
+	status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK,
+			  bit_reg_info->parent_register, &register_value);
+
+	if (flags & ACPI_MTX_LOCK) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_HARDWARE);
+	}
+
+	if (ACPI_SUCCESS (status)) {
+		/* Normalize the value that was read */
+
+		register_value = ((register_value & bit_reg_info->access_bit_mask)
+				   >> bit_reg_info->bit_position);
+
+		*return_value = register_value;
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read value %8.8X register %X\n",
+				register_value, bit_reg_info->parent_register));
+	}
+
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_register);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_register
+ *
+ * PARAMETERS:  register_id     - ID of ACPI bit_register to access
+ *              Value           - (only used on write) value to write to the
+ *                                Register, NOT pre-normalized to the bit pos
+ *              Flags           - Lock the hardware or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: ACPI Bit Register write function.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_set_register (
+	u32                             register_id,
+	u32                             value,
+	u32                             flags)
+{
+	u32                             register_value = 0;
+	struct acpi_bit_register_info   *bit_reg_info;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE_U32 ("acpi_set_register", register_id);
+
+
+	/* Get the info structure corresponding to the requested ACPI Register */
+
+	bit_reg_info = acpi_hw_get_bit_register_info (register_id);
+	if (!bit_reg_info) {
+		ACPI_REPORT_ERROR (("Bad ACPI HW register_id: %X\n", register_id));
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	if (flags & ACPI_MTX_LOCK) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_HARDWARE);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Always do a register read first so we can insert the new bits  */
+
+	status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK,
+			  bit_reg_info->parent_register, &register_value);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
+	/*
+	 * Decode the Register ID
+	 * Register ID = [Register block ID] | [bit ID]
+	 *
+	 * Check bit ID to fine locate Register offset.
+	 * Check Mask to determine Register offset, and then read-write.
+	 */
+	switch (bit_reg_info->parent_register) {
+	case ACPI_REGISTER_PM1_STATUS:
+
+		/*
+		 * Status Registers are different from the rest.  Clear by
+		 * writing 1, and writing 0 has no effect.  So, the only relevant
+		 * information is the single bit we're interested in, all others should
+		 * be written as 0 so they will be left unchanged.
+		 */
+		value = ACPI_REGISTER_PREPARE_BITS (value,
+				 bit_reg_info->bit_position, bit_reg_info->access_bit_mask);
+		if (value) {
+			status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
+					 ACPI_REGISTER_PM1_STATUS, (u16) value);
+			register_value = 0;
+		}
+		break;
+
+
+	case ACPI_REGISTER_PM1_ENABLE:
+
+		ACPI_REGISTER_INSERT_VALUE (register_value, bit_reg_info->bit_position,
+				bit_reg_info->access_bit_mask, value);
+
+		status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
+				  ACPI_REGISTER_PM1_ENABLE, (u16) register_value);
+		break;
+
+
+	case ACPI_REGISTER_PM1_CONTROL:
+
+		/*
+		 * Write the PM1 Control register.
+		 * Note that at this level, the fact that there are actually TWO
+		 * registers (A and B - and B may not exist) is abstracted.
+		 */
+		ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", register_value));
+
+		ACPI_REGISTER_INSERT_VALUE (register_value, bit_reg_info->bit_position,
+				bit_reg_info->access_bit_mask, value);
+
+		status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
+				  ACPI_REGISTER_PM1_CONTROL, (u16) register_value);
+		break;
+
+
+	case ACPI_REGISTER_PM2_CONTROL:
+
+		status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK,
+				 ACPI_REGISTER_PM2_CONTROL, &register_value);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n",
+			register_value,
+			ACPI_FORMAT_UINT64 (acpi_gbl_FADT->xpm2_cnt_blk.address)));
+
+		ACPI_REGISTER_INSERT_VALUE (register_value, bit_reg_info->bit_position,
+				bit_reg_info->access_bit_mask, value);
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %4.4X to %8.8X%8.8X\n",
+			register_value,
+			ACPI_FORMAT_UINT64 (acpi_gbl_FADT->xpm2_cnt_blk.address)));
+
+		status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
+				   ACPI_REGISTER_PM2_CONTROL, (u8) (register_value));
+		break;
+
+
+	default:
+		break;
+	}
+
+
+unlock_and_exit:
+
+	if (flags & ACPI_MTX_LOCK) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_HARDWARE);
+	}
+
+	/* Normalize the value that was read */
+
+	ACPI_DEBUG_EXEC (register_value = ((register_value & bit_reg_info->access_bit_mask) >> bit_reg_info->bit_position));
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Set bits: %8.8X actual %8.8X register %X\n",
+			value, register_value, bit_reg_info->parent_register));
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_set_register);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_register_read
+ *
+ * PARAMETERS:  use_lock            - Mutex hw access
+ *              register_id         - register_iD + Offset
+ *              return_value        - Value that was read from the register
+ *
+ * RETURN:      Status and the value read.
+ *
+ * DESCRIPTION: Acpi register read function.  Registers are read at the
+ *              given offset.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_register_read (
+	u8                              use_lock,
+	u32                             register_id,
+	u32                             *return_value)
+{
+	u32                             value1 = 0;
+	u32                             value2 = 0;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_register_read");
+
+
+	if (ACPI_MTX_LOCK == use_lock) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_HARDWARE);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	switch (register_id) {
+	case ACPI_REGISTER_PM1_STATUS:           /* 16-bit access */
+
+		status = acpi_hw_low_level_read (16, &value1, &acpi_gbl_FADT->xpm1a_evt_blk);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		/* PM1B is optional */
+
+		status = acpi_hw_low_level_read (16, &value2, &acpi_gbl_FADT->xpm1b_evt_blk);
+		value1 |= value2;
+		break;
+
+
+	case ACPI_REGISTER_PM1_ENABLE:           /* 16-bit access */
+
+		status = acpi_hw_low_level_read (16, &value1, &acpi_gbl_xpm1a_enable);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		/* PM1B is optional */
+
+		status = acpi_hw_low_level_read (16, &value2, &acpi_gbl_xpm1b_enable);
+		value1 |= value2;
+		break;
+
+
+	case ACPI_REGISTER_PM1_CONTROL:          /* 16-bit access */
+
+		status = acpi_hw_low_level_read (16, &value1, &acpi_gbl_FADT->xpm1a_cnt_blk);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		status = acpi_hw_low_level_read (16, &value2, &acpi_gbl_FADT->xpm1b_cnt_blk);
+		value1 |= value2;
+		break;
+
+
+	case ACPI_REGISTER_PM2_CONTROL:          /* 8-bit access */
+
+		status = acpi_hw_low_level_read (8, &value1, &acpi_gbl_FADT->xpm2_cnt_blk);
+		break;
+
+
+	case ACPI_REGISTER_PM_TIMER:             /* 32-bit access */
+
+		status = acpi_hw_low_level_read (32, &value1, &acpi_gbl_FADT->xpm_tmr_blk);
+		break;
+
+	case ACPI_REGISTER_SMI_COMMAND_BLOCK:    /* 8-bit access */
+
+		status = acpi_os_read_port (acpi_gbl_FADT->smi_cmd, &value1, 8);
+		break;
+
+	default:
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Register ID: %X\n", register_id));
+		status = AE_BAD_PARAMETER;
+		break;
+	}
+
+unlock_and_exit:
+	if (ACPI_MTX_LOCK == use_lock) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_HARDWARE);
+	}
+
+	if (ACPI_SUCCESS (status)) {
+		*return_value = value1;
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_register_write
+ *
+ * PARAMETERS:  use_lock            - Mutex hw access
+ *              register_id         - register_iD + Offset
+ *              Value               - The value to write
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Acpi register Write function.  Registers are written at the
+ *              given offset.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_register_write (
+	u8                              use_lock,
+	u32                             register_id,
+	u32                             value)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("hw_register_write");
+
+
+	if (ACPI_MTX_LOCK == use_lock) {
+		status = acpi_ut_acquire_mutex (ACPI_MTX_HARDWARE);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	switch (register_id) {
+	case ACPI_REGISTER_PM1_STATUS:           /* 16-bit access */
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_FADT->xpm1a_evt_blk);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		/* PM1B is optional */
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_FADT->xpm1b_evt_blk);
+		break;
+
+
+	case ACPI_REGISTER_PM1_ENABLE:           /* 16-bit access*/
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_xpm1a_enable);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		/* PM1B is optional */
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_xpm1b_enable);
+		break;
+
+
+	case ACPI_REGISTER_PM1_CONTROL:          /* 16-bit access */
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_FADT->xpm1a_cnt_blk);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_FADT->xpm1b_cnt_blk);
+		break;
+
+
+	case ACPI_REGISTER_PM1A_CONTROL:         /* 16-bit access */
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_FADT->xpm1a_cnt_blk);
+		break;
+
+
+	case ACPI_REGISTER_PM1B_CONTROL:         /* 16-bit access */
+
+		status = acpi_hw_low_level_write (16, value, &acpi_gbl_FADT->xpm1b_cnt_blk);
+		break;
+
+
+	case ACPI_REGISTER_PM2_CONTROL:          /* 8-bit access */
+
+		status = acpi_hw_low_level_write (8, value, &acpi_gbl_FADT->xpm2_cnt_blk);
+		break;
+
+
+	case ACPI_REGISTER_PM_TIMER:             /* 32-bit access */
+
+		status = acpi_hw_low_level_write (32, value, &acpi_gbl_FADT->xpm_tmr_blk);
+		break;
+
+
+	case ACPI_REGISTER_SMI_COMMAND_BLOCK:    /* 8-bit access */
+
+		/* SMI_CMD is currently always in IO space */
+
+		status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd, value, 8);
+		break;
+
+
+	default:
+		status = AE_BAD_PARAMETER;
+		break;
+	}
+
+unlock_and_exit:
+	if (ACPI_MTX_LOCK == use_lock) {
+		(void) acpi_ut_release_mutex (ACPI_MTX_HARDWARE);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_low_level_read
+ *
+ * PARAMETERS:  Width               - 8, 16, or 32
+ *              Value               - Where the value is returned
+ *              Reg                 - GAS register structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Read from either memory or IO space.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_low_level_read (
+	u32                             width,
+	u32                             *value,
+	struct acpi_generic_address     *reg)
+{
+	u64                             address;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_NAME ("hw_low_level_read");
+
+
+	/*
+	 * Must have a valid pointer to a GAS structure, and
+	 * a non-zero address within. However, don't return an error
+	 * because the PM1A/B code must not fail if B isn't present.
+	 */
+	if (!reg) {
+		return (AE_OK);
+	}
+
+	/* Get a local copy of the address.  Handles possible alignment issues */
+
+	ACPI_MOVE_64_TO_64 (&address, &reg->address);
+	if (!address) {
+		return (AE_OK);
+	}
+	*value = 0;
+
+	/*
+	 * Two address spaces supported: Memory or IO.
+	 * PCI_Config is not supported here because the GAS struct is insufficient
+	 */
+	switch (reg->address_space_id) {
+	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+
+		status = acpi_os_read_memory (
+				 (acpi_physical_address) address,
+				 value, width);
+		break;
+
+
+	case ACPI_ADR_SPACE_SYSTEM_IO:
+
+		status = acpi_os_read_port ((acpi_io_address) address,
+				 value, width);
+		break;
+
+
+	default:
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Unsupported address space: %X\n", reg->address_space_id));
+		return (AE_BAD_PARAMETER);
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read:  %8.8X width %2d from %8.8X%8.8X (%s)\n",
+			*value, width,
+			ACPI_FORMAT_UINT64 (address),
+			acpi_ut_get_region_name (reg->address_space_id)));
+
+	return (status);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_low_level_write
+ *
+ * PARAMETERS:  Width               - 8, 16, or 32
+ *              Value               - To be written
+ *              Reg                 - GAS register structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write to either memory or IO space.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_hw_low_level_write (
+	u32                             width,
+	u32                             value,
+	struct acpi_generic_address     *reg)
+{
+	u64                             address;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_NAME ("hw_low_level_write");
+
+
+	/*
+	 * Must have a valid pointer to a GAS structure, and
+	 * a non-zero address within. However, don't return an error
+	 * because the PM1A/B code must not fail if B isn't present.
+	 */
+	if (!reg) {
+		return (AE_OK);
+	}
+
+	/* Get a local copy of the address.  Handles possible alignment issues */
+
+	ACPI_MOVE_64_TO_64 (&address, &reg->address);
+	if (!address) {
+		return (AE_OK);
+	}
+
+	/*
+	 * Two address spaces supported: Memory or IO.
+	 * PCI_Config is not supported here because the GAS struct is insufficient
+	 */
+	switch (reg->address_space_id) {
+	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+
+		status = acpi_os_write_memory (
+				 (acpi_physical_address) address,
+				 value, width);
+		break;
+
+
+	case ACPI_ADR_SPACE_SYSTEM_IO:
+
+		status = acpi_os_write_port ((acpi_io_address) address,
+				 value, width);
+		break;
+
+
+	default:
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"Unsupported address space: %X\n", reg->address_space_id));
+		return (AE_BAD_PARAMETER);
+	}
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Wrote: %8.8X width %2d   to %8.8X%8.8X (%s)\n",
+			value, width,
+			ACPI_FORMAT_UINT64 (address),
+			acpi_ut_get_region_name (reg->address_space_id)));
+
+	return (status);
+}
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
new file mode 100644
index 00000000000..77b3e9a8550
--- /dev/null
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -0,0 +1,582 @@
+
+/******************************************************************************
+ *
+ * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
+ *
+ *****************************************************************************/
+
+/*
+ * 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>
+
+#define _COMPONENT          ACPI_HARDWARE
+	 ACPI_MODULE_NAME    ("hwsleep")
+
+
+#define METHOD_NAME__BFS        "\\_BFS"
+#define METHOD_NAME__GTS        "\\_GTS"
+#define METHOD_NAME__PTS        "\\_PTS"
+#define METHOD_NAME__SST        "\\_SI._SST"
+#define METHOD_NAME__WAK        "\\_WAK"
+
+#define ACPI_SST_INDICATOR_OFF  0
+#define ACPI_SST_WORKING        1
+#define ACPI_SST_WAKING         2
+#define ACPI_SST_SLEEPING       3
+#define ACPI_SST_SLEEP_CONTEXT  4
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_set_firmware_waking_vector
+ *
+ * PARAMETERS:  physical_address    - Physical address of ACPI real mode
+ *                                    entry point.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: access function for d_firmware_waking_vector field in FACS
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_set_firmware_waking_vector (
+	acpi_physical_address physical_address)
+{
+
+	ACPI_FUNCTION_TRACE ("acpi_set_firmware_waking_vector");
+
+
+	/* Set the vector */
+
+	if (acpi_gbl_common_fACS.vector_width == 32) {
+		*(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector))
+				= (u32) physical_address;
+	}
+	else {
+		*acpi_gbl_common_fACS.firmware_waking_vector
+				= physical_address;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_firmware_waking_vector
+ *
+ * PARAMETERS:  *physical_address   - Output buffer where contents of
+ *                                    the firmware_waking_vector field of
+ *                                    the FACS will be stored.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Access function for firmware_waking_vector field in FACS
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_get_firmware_waking_vector (
+	acpi_physical_address *physical_address)
+{
+
+	ACPI_FUNCTION_TRACE ("acpi_get_firmware_waking_vector");
+
+
+	if (!physical_address) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/* Get the vector */
+
+	if (acpi_gbl_common_fACS.vector_width == 32) {
+		*physical_address = (acpi_physical_address)
+			*(ACPI_CAST_PTR (u32, acpi_gbl_common_fACS.firmware_waking_vector));
+	}
+	else {
+		*physical_address =
+			*acpi_gbl_common_fACS.firmware_waking_vector;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+#endif
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state_prep
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
+ *              This function must execute with interrupts enabled.
+ *              We break sleeping into 2 stages so that OSPM can handle
+ *              various OS-specific tasks between the two steps.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enter_sleep_state_prep (
+	u8                          sleep_state)
+{
+	acpi_status                 status;
+	struct acpi_object_list     arg_list;
+	union acpi_object           arg;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_enter_sleep_state_prep");
+
+
+	/*
+	 * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
+	 */
+	status = acpi_get_sleep_type_data (sleep_state,
+			  &acpi_gbl_sleep_type_a, &acpi_gbl_sleep_type_b);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Setup parameter object */
+
+	arg_list.count = 1;
+	arg_list.pointer = &arg;
+
+	arg.type = ACPI_TYPE_INTEGER;
+	arg.integer.value = sleep_state;
+
+	/* Run the _PTS and _GTS methods */
+
+	status = acpi_evaluate_object (NULL, METHOD_NAME__PTS, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_evaluate_object (NULL, METHOD_NAME__GTS, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Setup the argument to _SST */
+
+	switch (sleep_state) {
+	case ACPI_STATE_S0:
+		arg.integer.value = ACPI_SST_WORKING;
+		break;
+
+	case ACPI_STATE_S1:
+	case ACPI_STATE_S2:
+	case ACPI_STATE_S3:
+		arg.integer.value = ACPI_SST_SLEEPING;
+		break;
+
+	case ACPI_STATE_S4:
+		arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
+		break;
+
+	default:
+		arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is indicator off */
+		break;
+	}
+
+	/* Set the system indicators to show the desired sleep state. */
+
+	status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		 ACPI_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status)));
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+acpi_status asmlinkage
+acpi_enter_sleep_state (
+	u8                              sleep_state)
+{
+	u32                             PM1Acontrol;
+	u32                             PM1Bcontrol;
+	struct acpi_bit_register_info   *sleep_type_reg_info;
+	struct acpi_bit_register_info   *sleep_enable_reg_info;
+	u32                             in_value;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_enter_sleep_state");
+
+
+	if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
+		(acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
+		ACPI_REPORT_ERROR (("Sleep values out of range: A=%X B=%X\n",
+			acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
+		return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
+	}
+
+	sleep_type_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A);
+	sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE);
+
+	/* Clear wake status */
+
+	status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Clear all fixed and general purpose status bits */
+
+	status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * 1) Disable/Clear all GPEs
+	 * 2) Enable all wakeup GPEs
+	 */
+	status = acpi_hw_disable_all_gpes (ACPI_ISR);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+	acpi_gbl_system_awake_and_running = FALSE;
+
+	status = acpi_hw_enable_all_wakeup_gpes (ACPI_ISR);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Get current value of PM1A control */
+
+	status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+	ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Entering sleep state [S%d]\n", sleep_state));
+
+	/* Clear SLP_EN and SLP_TYP fields */
+
+	PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | sleep_enable_reg_info->access_bit_mask);
+	PM1Bcontrol = PM1Acontrol;
+
+	/* Insert SLP_TYP bits */
+
+	PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
+	PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
+
+	/*
+	 * We split the writes of SLP_TYP and SLP_EN to workaround
+	 * poorly implemented hardware.
+	 */
+
+	/* Write #1: fill in SLP_TYP data */
+
+	status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Insert SLP_ENABLE bit */
+
+	PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
+	PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
+
+	/* Write #2: SLP_TYP + SLP_EN */
+
+	ACPI_FLUSH_CPU_CACHE ();
+
+	status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	if (sleep_state > ACPI_STATE_S3) {
+		/*
+		 * We wanted to sleep > S3, but it didn't happen (by virtue of the fact that
+		 * we are still executing!)
+		 *
+		 * Wait ten seconds, then try again. This is to get S4/S5 to work on all machines.
+		 *
+		 * We wait so long to allow chipsets that poll this reg very slowly to
+		 * still read the right value. Ideally, this block would go
+		 * away entirely.
+		 */
+		acpi_os_stall (10000000);
+
+		status = acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_CONTROL,
+				 sleep_enable_reg_info->access_bit_mask);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	}
+
+	/* Wait until we enter sleep state */
+
+	do {
+		status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+
+		/* Spin until we wake */
+
+	} while (!in_value);
+
+	return_ACPI_STATUS (AE_OK);
+}
+EXPORT_SYMBOL(acpi_enter_sleep_state);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_enter_sleep_state_s4bios
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform a S4 bios request.
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+acpi_status asmlinkage
+acpi_enter_sleep_state_s4bios (
+	void)
+{
+	u32                             in_value;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_enter_sleep_state_s4bios");
+
+
+	status = acpi_set_register (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * 1) Disable/Clear all GPEs
+	 * 2) Enable all wakeup GPEs
+	 */
+	status = acpi_hw_disable_all_gpes (ACPI_ISR);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+	acpi_gbl_system_awake_and_running = FALSE;
+
+	status = acpi_hw_enable_all_wakeup_gpes (ACPI_ISR);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	ACPI_FLUSH_CPU_CACHE ();
+
+	status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd, (u32) acpi_gbl_FADT->S4bios_req, 8);
+
+	do {
+		acpi_os_stall(1000);
+		status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK);
+		if (ACPI_FAILURE (status)) {
+			return_ACPI_STATUS (status);
+		}
+	} while (!in_value);
+
+	return_ACPI_STATUS (AE_OK);
+}
+EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_leave_sleep_state
+ *
+ * PARAMETERS:  sleep_state         - Which sleep state we just exited
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ *              Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_leave_sleep_state (
+	u8                              sleep_state)
+{
+	struct acpi_object_list         arg_list;
+	union acpi_object               arg;
+	acpi_status                     status;
+	struct acpi_bit_register_info   *sleep_type_reg_info;
+	struct acpi_bit_register_info   *sleep_enable_reg_info;
+	u32                             PM1Acontrol;
+	u32                             PM1Bcontrol;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_leave_sleep_state");
+
+
+	/*
+	 * Set SLP_TYPE and SLP_EN to state S0.
+	 * This is unclear from the ACPI Spec, but it is required
+	 * by some machines.
+	 */
+	status = acpi_get_sleep_type_data (ACPI_STATE_S0,
+			  &acpi_gbl_sleep_type_a, &acpi_gbl_sleep_type_b);
+	if (ACPI_SUCCESS (status)) {
+		sleep_type_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_TYPE_A);
+		sleep_enable_reg_info = acpi_hw_get_bit_register_info (ACPI_BITREG_SLEEP_ENABLE);
+
+		/* Get current value of PM1A control */
+
+		status = acpi_hw_register_read (ACPI_MTX_DO_NOT_LOCK,
+				 ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
+		if (ACPI_SUCCESS (status)) {
+			/* Clear SLP_EN and SLP_TYP fields */
+
+			PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
+					   sleep_enable_reg_info->access_bit_mask);
+			PM1Bcontrol = PM1Acontrol;
+
+			/* Insert SLP_TYP bits */
+
+			PM1Acontrol |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
+			PM1Bcontrol |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
+
+			/* Just ignore any errors */
+
+			(void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
+					  ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol);
+			(void) acpi_hw_register_write (ACPI_MTX_DO_NOT_LOCK,
+					  ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol);
+		}
+	}
+
+	/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
+
+	acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
+
+	/* Setup parameter object */
+
+	arg_list.count = 1;
+	arg_list.pointer = &arg;
+	arg.type = ACPI_TYPE_INTEGER;
+
+	/* Ignore any errors from these methods */
+
+	arg.integer.value = ACPI_SST_WAKING;
+	status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		ACPI_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status)));
+	}
+
+	arg.integer.value = sleep_state;
+	status = acpi_evaluate_object (NULL, METHOD_NAME__BFS, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		ACPI_REPORT_ERROR (("Method _BFS failed, %s\n", acpi_format_exception (status)));
+	}
+
+	status = acpi_evaluate_object (NULL, METHOD_NAME__WAK, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		ACPI_REPORT_ERROR (("Method _WAK failed, %s\n", acpi_format_exception (status)));
+	}
+	/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
+
+	/*
+	 * Restore the GPEs:
+	 * 1) Disable/Clear all GPEs
+	 * 2) Enable all runtime GPEs
+	 */
+	status = acpi_hw_disable_all_gpes (ACPI_NOT_ISR);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+	acpi_gbl_system_awake_and_running = TRUE;
+
+	status = acpi_hw_enable_all_runtime_gpes (ACPI_NOT_ISR);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Enable power button */
+
+	(void) acpi_set_register(acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].enable_register_id,
+			1, ACPI_MTX_DO_NOT_LOCK);
+	(void) acpi_set_register(acpi_gbl_fixed_event_info[ACPI_EVENT_POWER_BUTTON].status_register_id,
+			1, ACPI_MTX_DO_NOT_LOCK);
+
+	arg.integer.value = ACPI_SST_WORKING;
+	status = acpi_evaluate_object (NULL, METHOD_NAME__SST, &arg_list, NULL);
+	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
+		ACPI_REPORT_ERROR (("Method _SST failed, %s\n", acpi_format_exception (status)));
+	}
+
+	return_ACPI_STATUS (status);
+}
diff --git a/drivers/acpi/hardware/hwtimer.c b/drivers/acpi/hardware/hwtimer.c
new file mode 100644
index 00000000000..1906167d729
--- /dev/null
+++ b/drivers/acpi/hardware/hwtimer.c
@@ -0,0 +1,203 @@
+
+/******************************************************************************
+ *
+ * Name: hwtimer.c - ACPI Power Management Timer Interface
+ *
+ *****************************************************************************/
+
+/*
+ * 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>
+
+#define _COMPONENT          ACPI_HARDWARE
+	 ACPI_MODULE_NAME    ("hwtimer")
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_timer_resolution
+ *
+ * PARAMETERS:  Resolution          - Where the resolution is returned
+ *
+ * RETURN:      Status and timer resolution
+ *
+ * DESCRIPTION: Obtains resolution of the ACPI PM Timer (24 or 32 bits).
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_timer_resolution (
+	u32                             *resolution)
+{
+	ACPI_FUNCTION_TRACE ("acpi_get_timer_resolution");
+
+
+	if (!resolution) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	if (0 == acpi_gbl_FADT->tmr_val_ext) {
+		*resolution = 24;
+	}
+	else {
+		*resolution = 32;
+	}
+
+	return_ACPI_STATUS (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_timer
+ *
+ * PARAMETERS:  Ticks               - Where the timer value is returned
+ *
+ * RETURN:      Status and current ticks
+ *
+ * DESCRIPTION: Obtains current value of ACPI PM Timer (in ticks).
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_timer (
+	u32                             *ticks)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_timer");
+
+
+	if (!ticks) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_hw_low_level_read (32, ticks, &acpi_gbl_FADT->xpm_tmr_blk);
+
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_timer);
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_get_timer_duration
+ *
+ * PARAMETERS:  start_ticks         - Starting timestamp
+ *              end_ticks           - End timestamp
+ *              time_elapsed        - Where the elapsed time is returned
+ *
+ * RETURN:      Status and time_elapsed
+ *
+ * DESCRIPTION: Computes the time elapsed (in microseconds) between two
+ *              PM Timer time stamps, taking into account the possibility of
+ *              rollovers, the timer resolution, and timer frequency.
+ *
+ *              The PM Timer's clock ticks at roughly 3.6 times per
+ *              _microsecond_, and its clock continues through Cx state
+ *              transitions (unlike many CPU timestamp counters) -- making it
+ *              a versatile and accurate timer.
+ *
+ *              Note that this function accommodates only a single timer
+ *              rollover.  Thus for 24-bit timers, this function should only
+ *              be used for calculating durations less than ~4.6 seconds
+ *              (~20 minutes for 32-bit timers) -- calculations below:
+ *
+ *              2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec
+ *              2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_timer_duration (
+	u32                             start_ticks,
+	u32                             end_ticks,
+	u32                             *time_elapsed)
+{
+	acpi_status                     status;
+	u32                             delta_ticks;
+	acpi_integer                    quotient;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_timer_duration");
+
+
+	if (!time_elapsed) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Compute Tick Delta:
+	 * Handle (max one) timer rollovers on 24-bit versus 32-bit timers.
+	 */
+	if (start_ticks < end_ticks) {
+		delta_ticks = end_ticks - start_ticks;
+	}
+	else if (start_ticks > end_ticks) {
+		if (0 == acpi_gbl_FADT->tmr_val_ext) {
+			/* 24-bit Timer */
+
+			delta_ticks = (((0x00FFFFFF - start_ticks) + end_ticks) & 0x00FFFFFF);
+		}
+		else {
+			/* 32-bit Timer */
+
+			delta_ticks = (0xFFFFFFFF - start_ticks) + end_ticks;
+		}
+	}
+	else /* start_ticks == end_ticks */ {
+		*time_elapsed = 0;
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/*
+	 * Compute Duration (Requires a 64-bit multiply and divide):
+	 *
+	 * time_elapsed = (delta_ticks * 1000000) / PM_TIMER_FREQUENCY;
+	 */
+	status = acpi_ut_short_divide (((u64) delta_ticks) * 1000000,
+			 PM_TIMER_FREQUENCY, &quotient, NULL);
+
+	*time_elapsed = (u32) quotient;
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_timer_duration);
+