diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
new file mode 100644
index 0000000..968eb32
--- /dev/null
+++ b/drivers/pci/pci-acpi.c
@@ -0,0 +1,209 @@
+/*
+ * File:	pci-acpi.c
+ * Purpose:	Provide PCI supports in ACPI
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acresrc.h>
+#include <acpi/acpi_bus.h>
+
+#include <linux/pci-acpi.h>
+
+static u32 ctrlset_buf[3] = {0, 0, 0};
+static u32 global_ctrlsets = 0;
+u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
+
+static acpi_status  
+acpi_query_osc (
+	acpi_handle	handle,
+	u32		level,
+	void		*context,
+	void		**retval )
+{
+	acpi_status		status;
+	struct acpi_object_list	input;
+	union acpi_object 	in_params[4];
+	struct acpi_buffer	output;
+	union acpi_object 	out_obj;	
+	u32			osc_dw0;
+
+	/* Setting up output buffer */
+	output.length = sizeof(out_obj) + 3*sizeof(u32);  
+	output.pointer = &out_obj;
+	
+	/* Setting up input parameters */
+	input.count = 4;
+	input.pointer = in_params;
+	in_params[0].type 		= ACPI_TYPE_BUFFER;
+	in_params[0].buffer.length 	= 16;
+	in_params[0].buffer.pointer	= OSC_UUID;
+	in_params[1].type 		= ACPI_TYPE_INTEGER;
+	in_params[1].integer.value 	= 1;
+	in_params[2].type 		= ACPI_TYPE_INTEGER;
+	in_params[2].integer.value	= 3;
+	in_params[3].type		= ACPI_TYPE_BUFFER;
+	in_params[3].buffer.length 	= 12;
+	in_params[3].buffer.pointer 	= (u8 *)context;
+
+	status = acpi_evaluate_object(handle, "_OSC", &input, &output);
+	if (ACPI_FAILURE (status)) {
+		printk(KERN_DEBUG  
+			"Evaluate _OSC Set fails. Status = 0x%04x\n", status);
+		return status;
+	}
+	if (out_obj.type != ACPI_TYPE_BUFFER) {
+		printk(KERN_DEBUG  
+			"Evaluate _OSC returns wrong type\n");
+		return AE_TYPE;
+	}
+	osc_dw0 = *((u32 *) out_obj.buffer.pointer);
+	if (osc_dw0) {
+		if (osc_dw0 & OSC_REQUEST_ERROR)
+			printk(KERN_DEBUG "_OSC request fails\n"); 
+		if (osc_dw0 & OSC_INVALID_UUID_ERROR)
+			printk(KERN_DEBUG "_OSC invalid UUID\n"); 
+		if (osc_dw0 & OSC_INVALID_REVISION_ERROR)
+			printk(KERN_DEBUG "_OSC invalid revision\n"); 
+		if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
+			/* Update Global Control Set */
+			global_ctrlsets = *((u32 *)(out_obj.buffer.pointer+8));
+			return AE_OK;
+		}
+		return AE_ERROR;
+	}
+
+	/* Update Global Control Set */
+	global_ctrlsets = *((u32 *)(out_obj.buffer.pointer + 8));
+	return AE_OK;
+}
+
+
+static acpi_status  
+acpi_run_osc (
+	acpi_handle	handle,
+	u32		level,
+	void		*context,
+	void		**retval )
+{
+	acpi_status		status;
+	struct acpi_object_list	input;
+	union acpi_object 	in_params[4];
+	struct acpi_buffer	output;
+	union acpi_object 	out_obj;	
+	u32			osc_dw0;
+
+	/* Setting up output buffer */
+	output.length = sizeof(out_obj) + 3*sizeof(u32);  
+	output.pointer = &out_obj;
+	
+	/* Setting up input parameters */
+	input.count = 4;
+	input.pointer = in_params;
+	in_params[0].type 		= ACPI_TYPE_BUFFER;
+	in_params[0].buffer.length 	= 16;
+	in_params[0].buffer.pointer	= OSC_UUID;
+	in_params[1].type 		= ACPI_TYPE_INTEGER;
+	in_params[1].integer.value 	= 1;
+	in_params[2].type 		= ACPI_TYPE_INTEGER;
+	in_params[2].integer.value	= 3;
+	in_params[3].type		= ACPI_TYPE_BUFFER;
+	in_params[3].buffer.length 	= 12;
+	in_params[3].buffer.pointer 	= (u8 *)context;
+
+	status = acpi_evaluate_object(handle, "_OSC", &input, &output);
+	if (ACPI_FAILURE (status)) {
+		printk(KERN_DEBUG  
+			"Evaluate _OSC Set fails. Status = 0x%04x\n", status);
+		return status;
+	}
+	if (out_obj.type != ACPI_TYPE_BUFFER) {
+		printk(KERN_DEBUG  
+			"Evaluate _OSC returns wrong type\n");
+		return AE_TYPE;
+	}
+	osc_dw0 = *((u32 *) out_obj.buffer.pointer);
+	if (osc_dw0) {
+		if (osc_dw0 & OSC_REQUEST_ERROR)
+			printk(KERN_DEBUG "_OSC request fails\n"); 
+		if (osc_dw0 & OSC_INVALID_UUID_ERROR)
+			printk(KERN_DEBUG "_OSC invalid UUID\n"); 
+		if (osc_dw0 & OSC_INVALID_REVISION_ERROR)
+			printk(KERN_DEBUG "_OSC invalid revision\n"); 
+		if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
+			printk(KERN_DEBUG "_OSC FW not grant req. control\n");
+			return AE_SUPPORT;
+		}
+		return AE_ERROR;
+	}
+	return AE_OK;
+}
+
+/**
+ * pci_osc_support_set - register OS support to Firmware
+ * @flags: OS support bits
+ *
+ * Update OS support fields and doing a _OSC Query to obtain an update
+ * from Firmware on supported control bits.
+ **/
+acpi_status pci_osc_support_set(u32 flags)
+{
+	u32 temp;
+
+	if (!(flags & OSC_SUPPORT_MASKS)) {
+		return AE_TYPE;
+	}
+	ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
+
+	/* do _OSC query for all possible controls */
+	temp = ctrlset_buf[OSC_CONTROL_TYPE];
+	ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
+	ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
+	acpi_get_devices ( PCI_ROOT_HID_STRING,
+			acpi_query_osc,
+			ctrlset_buf,
+			NULL );
+	ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
+	ctrlset_buf[OSC_CONTROL_TYPE] = temp;
+	return AE_OK;
+}
+EXPORT_SYMBOL(pci_osc_support_set);
+
+/**
+ * pci_osc_control_set - commit requested control to Firmware
+ * @flags: driver's requested control bits
+ *
+ * Attempt to take control from Firmware on requested control bits.
+ **/
+acpi_status pci_osc_control_set(u32 flags)
+{
+	acpi_status	status;
+	u32		ctrlset;
+
+	ctrlset = (flags & OSC_CONTROL_MASKS);
+	if (!ctrlset) {
+		return AE_TYPE;
+	}
+	if (ctrlset_buf[OSC_SUPPORT_TYPE] && 
+	 	((global_ctrlsets & ctrlset) != ctrlset)) {
+		return AE_SUPPORT;
+	}
+	ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
+	status = acpi_get_devices ( PCI_ROOT_HID_STRING,
+				acpi_run_osc,
+				ctrlset_buf,
+				NULL );
+	if (ACPI_FAILURE (status)) {
+		ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
+	}
+	
+	return status;
+}
+EXPORT_SYMBOL(pci_osc_control_set);