Initial import

1 files changed, 706 insertions, 0 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
new file mode 100644
index 000000000..513e7230e
--- /dev/null
+++ b/drivers/acpi/bus.c
@@ -0,0 +1,706 @@
+/*
+ *  acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
+ *
+ *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or (at
+ *  your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/proc_fs.h>
+#include <linux/acpi.h>
+#include <linux/slab.h>
+#include <linux/regulator/machine.h>
+#ifdef CONFIG_X86
+#include <asm/mpspec.h>
+#endif
+#include <linux/pci.h>
+#include <acpi/apei.h>
+#include <linux/dmi.h>
+#include <linux/suspend.h>
+
+#include "internal.h"
+
+#define _COMPONENT		ACPI_BUS_COMPONENT
+ACPI_MODULE_NAME("bus");
+
+struct acpi_device *acpi_root;
+struct proc_dir_entry *acpi_root_dir;
+EXPORT_SYMBOL(acpi_root_dir);
+
+#ifdef CONFIG_X86
+#ifdef CONFIG_ACPI_CUSTOM_DSDT
+static inline int set_copy_dsdt(const struct dmi_system_id *id)
+{
+	return 0;
+}
+#else
+static int set_copy_dsdt(const struct dmi_system_id *id)
+{
+	printk(KERN_NOTICE "%s detected - "
+		"force copy of DSDT to local memory\n", id->ident);
+	acpi_gbl_copy_dsdt_locally = 1;
+	return 0;
+}
+#endif
+
+static struct dmi_system_id dsdt_dmi_table[] __initdata = {
+	/*
+	 * Invoke DSDT corruption work-around on all Toshiba Satellite.
+	 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
+	 */
+	{
+	 .callback = set_copy_dsdt,
+	 .ident = "TOSHIBA Satellite",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
+		},
+	},
+	{}
+};
+#else
+static struct dmi_system_id dsdt_dmi_table[] __initdata = {
+	{}
+};
+#endif
+
+/* --------------------------------------------------------------------------
+                                Device Management
+   -------------------------------------------------------------------------- */
+
+acpi_status acpi_bus_get_status_handle(acpi_handle handle,
+				       unsigned long long *sta)
+{
+	acpi_status status;
+
+	status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
+	if (ACPI_SUCCESS(status))
+		return AE_OK;
+
+	if (status == AE_NOT_FOUND) {
+		*sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
+		       ACPI_STA_DEVICE_UI      | ACPI_STA_DEVICE_FUNCTIONING;
+		return AE_OK;
+	}
+	return status;
+}
+
+int acpi_bus_get_status(struct acpi_device *device)
+{
+	acpi_status status;
+	unsigned long long sta;
+
+	status = acpi_bus_get_status_handle(device->handle, &sta);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	acpi_set_device_status(device, sta);
+
+	if (device->status.functional && !device->status.present) {
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
+		       "functional but not present;\n",
+			device->pnp.bus_id, (u32)sta));
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
+			  device->pnp.bus_id, (u32)sta));
+	return 0;
+}
+EXPORT_SYMBOL(acpi_bus_get_status);
+
+void acpi_bus_private_data_handler(acpi_handle handle,
+				   void *context)
+{
+	return;
+}
+EXPORT_SYMBOL(acpi_bus_private_data_handler);
+
+int acpi_bus_attach_private_data(acpi_handle handle, void *data)
+{
+	acpi_status status;
+
+	status = acpi_attach_data(handle,
+			acpi_bus_private_data_handler, data);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_debug(handle, "Error attaching device data\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
+
+int acpi_bus_get_private_data(acpi_handle handle, void **data)
+{
+	acpi_status status;
+
+	if (!*data)
+		return -EINVAL;
+
+	status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_debug(handle, "No context for object\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
+
+void acpi_bus_detach_private_data(acpi_handle handle)
+{
+	acpi_detach_data(handle, acpi_bus_private_data_handler);
+}
+EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
+
+static void acpi_print_osc_error(acpi_handle handle,
+	struct acpi_osc_context *context, char *error)
+{
+	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
+	int i;
+
+	if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
+		printk(KERN_DEBUG "%s\n", error);
+	else {
+		printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
+		kfree(buffer.pointer);
+	}
+	printk(KERN_DEBUG"_OSC request data:");
+	for (i = 0; i < context->cap.length; i += sizeof(u32))
+		printk("%x ", *((u32 *)(context->cap.pointer + i)));
+	printk("\n");
+}
+
+acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
+{
+	int i;
+	static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
+		24, 26, 28, 30, 32, 34};
+
+	if (strlen(str) != 36)
+		return AE_BAD_PARAMETER;
+	for (i = 0; i < 36; i++) {
+		if (i == 8 || i == 13 || i == 18 || i == 23) {
+			if (str[i] != '-')
+				return AE_BAD_PARAMETER;
+		} else if (!isxdigit(str[i]))
+			return AE_BAD_PARAMETER;
+	}
+	for (i = 0; i < 16; i++) {
+		uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
+		uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
+	}
+	return AE_OK;
+}
+EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
+
+acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
+{
+	acpi_status status;
+	struct acpi_object_list input;
+	union acpi_object in_params[4];
+	union acpi_object *out_obj;
+	u8 uuid[16];
+	u32 errors;
+	struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
+
+	if (!context)
+		return AE_ERROR;
+	if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
+		return AE_ERROR;
+	context->ret.length = ACPI_ALLOCATE_BUFFER;
+	context->ret.pointer = NULL;
+
+	/* 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	= uuid;
+	in_params[1].type 		= ACPI_TYPE_INTEGER;
+	in_params[1].integer.value 	= context->rev;
+	in_params[2].type 		= ACPI_TYPE_INTEGER;
+	in_params[2].integer.value	= context->cap.length/sizeof(u32);
+	in_params[3].type		= ACPI_TYPE_BUFFER;
+	in_params[3].buffer.length 	= context->cap.length;
+	in_params[3].buffer.pointer 	= context->cap.pointer;
+
+	status = acpi_evaluate_object(handle, "_OSC", &input, &output);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	if (!output.length)
+		return AE_NULL_OBJECT;
+
+	out_obj = output.pointer;
+	if (out_obj->type != ACPI_TYPE_BUFFER
+		|| out_obj->buffer.length != context->cap.length) {
+		acpi_print_osc_error(handle, context,
+			"_OSC evaluation returned wrong type");
+		status = AE_TYPE;
+		goto out_kfree;
+	}
+	/* Need to ignore the bit0 in result code */
+	errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
+	if (errors) {
+		if (errors & OSC_REQUEST_ERROR)
+			acpi_print_osc_error(handle, context,
+				"_OSC request failed");
+		if (errors & OSC_INVALID_UUID_ERROR)
+			acpi_print_osc_error(handle, context,
+				"_OSC invalid UUID");
+		if (errors & OSC_INVALID_REVISION_ERROR)
+			acpi_print_osc_error(handle, context,
+				"_OSC invalid revision");
+		if (errors & OSC_CAPABILITIES_MASK_ERROR) {
+			if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
+			    & OSC_QUERY_ENABLE)
+				goto out_success;
+			status = AE_SUPPORT;
+			goto out_kfree;
+		}
+		status = AE_ERROR;
+		goto out_kfree;
+	}
+out_success:
+	context->ret.length = out_obj->buffer.length;
+	context->ret.pointer = kmemdup(out_obj->buffer.pointer,
+				       context->ret.length, GFP_KERNEL);
+	if (!context->ret.pointer) {
+		status =  AE_NO_MEMORY;
+		goto out_kfree;
+	}
+	status =  AE_OK;
+
+out_kfree:
+	kfree(output.pointer);
+	if (status != AE_OK)
+		context->ret.pointer = NULL;
+	return status;
+}
+EXPORT_SYMBOL(acpi_run_osc);
+
+bool osc_sb_apei_support_acked;
+static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
+static void acpi_bus_osc_support(void)
+{
+	u32 capbuf[2];
+	struct acpi_osc_context context = {
+		.uuid_str = sb_uuid_str,
+		.rev = 1,
+		.cap.length = 8,
+		.cap.pointer = capbuf,
+	};
+	acpi_handle handle;
+
+	capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
+	capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
+#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
+			defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
+	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
+#endif
+
+#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
+	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
+#endif
+
+	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
+
+	if (!ghes_disable)
+		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
+	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
+		return;
+	if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
+		u32 *capbuf_ret = context.ret.pointer;
+		if (context.ret.length > OSC_SUPPORT_DWORD)
+			osc_sb_apei_support_acked =
+				capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
+		kfree(context.ret.pointer);
+	}
+	/* do we need to check other returned cap? Sounds no */
+}
+
+/* --------------------------------------------------------------------------
+                             Notification Handling
+   -------------------------------------------------------------------------- */
+
+/**
+ * acpi_bus_notify
+ * ---------------
+ * Callback for all 'system-level' device notifications (values 0x00-0x7F).
+ */
+static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
+{
+	struct acpi_device *adev;
+	struct acpi_driver *driver;
+	u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
+	bool hotplug_event = false;
+
+	switch (type) {
+	case ACPI_NOTIFY_BUS_CHECK:
+		acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
+		hotplug_event = true;
+		break;
+
+	case ACPI_NOTIFY_DEVICE_CHECK:
+		acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
+		hotplug_event = true;
+		break;
+
+	case ACPI_NOTIFY_DEVICE_WAKE:
+		acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
+		break;
+
+	case ACPI_NOTIFY_EJECT_REQUEST:
+		acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
+		hotplug_event = true;
+		break;
+
+	case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
+		acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
+		/* TBD: Exactly what does 'light' mean? */
+		break;
+
+	case ACPI_NOTIFY_FREQUENCY_MISMATCH:
+		acpi_handle_err(handle, "Device cannot be configured due "
+				"to a frequency mismatch\n");
+		break;
+
+	case ACPI_NOTIFY_BUS_MODE_MISMATCH:
+		acpi_handle_err(handle, "Device cannot be configured due "
+				"to a bus mode mismatch\n");
+		break;
+
+	case ACPI_NOTIFY_POWER_FAULT:
+		acpi_handle_err(handle, "Device has suffered a power fault\n");
+		break;
+
+	default:
+		acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
+		break;
+	}
+
+	adev = acpi_bus_get_acpi_device(handle);
+	if (!adev)
+		goto err;
+
+	driver = adev->driver;
+	if (driver && driver->ops.notify &&
+	    (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
+		driver->ops.notify(adev, type);
+
+	if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
+		return;
+
+	acpi_bus_put_acpi_device(adev);
+	return;
+
+ err:
+	acpi_evaluate_ost(handle, type, ost_code, NULL);
+}
+
+/* --------------------------------------------------------------------------
+                             Initialization/Cleanup
+   -------------------------------------------------------------------------- */
+
+static int __init acpi_bus_init_irq(void)
+{
+	acpi_status status;
+	char *message = NULL;
+
+
+	/*
+	 * Let the system know what interrupt model we are using by
+	 * evaluating the \_PIC object, if exists.
+	 */
+
+	switch (acpi_irq_model) {
+	case ACPI_IRQ_MODEL_PIC:
+		message = "PIC";
+		break;
+	case ACPI_IRQ_MODEL_IOAPIC:
+		message = "IOAPIC";
+		break;
+	case ACPI_IRQ_MODEL_IOSAPIC:
+		message = "IOSAPIC";
+		break;
+	case ACPI_IRQ_MODEL_GIC:
+		message = "GIC";
+		break;
+	case ACPI_IRQ_MODEL_PLATFORM:
+		message = "platform specific model";
+		break;
+	default:
+		printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
+		return -ENODEV;
+	}
+
+	printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
+
+	status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
+	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
+		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/**
+ * acpi_early_init - Initialize ACPICA and populate the ACPI namespace.
+ *
+ * The ACPI tables are accessible after this, but the handling of events has not
+ * been initialized and the global lock is not available yet, so AML should not
+ * be executed at this point.
+ *
+ * Doing this before switching the EFI runtime services to virtual mode allows
+ * the EfiBootServices memory to be freed slightly earlier on boot.
+ */
+void __init acpi_early_init(void)
+{
+	acpi_status status;
+
+	if (acpi_disabled)
+		return;
+
+	printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
+
+	/* It's safe to verify table checksums during late stage */
+	acpi_gbl_verify_table_checksum = TRUE;
+
+	/* enable workarounds, unless strict ACPI spec. compliance */
+	if (!acpi_strict)
+		acpi_gbl_enable_interpreter_slack = TRUE;
+
+	acpi_gbl_permanent_mmap = 1;
+
+	/*
+	 * If the machine falls into the DMI check table,
+	 * DSDT will be copied to memory
+	 */
+	dmi_check_system(dsdt_dmi_table);
+
+	status = acpi_reallocate_root_table();
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX
+		       "Unable to reallocate ACPI tables\n");
+		goto error0;
+	}
+
+	status = acpi_initialize_subsystem();
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX
+		       "Unable to initialize the ACPI Interpreter\n");
+		goto error0;
+	}
+
+	status = acpi_load_tables();
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX
+		       "Unable to load the System Description Tables\n");
+		goto error0;
+	}
+
+#ifdef CONFIG_X86
+	if (!acpi_ioapic) {
+		/* compatible (0) means level (3) */
+		if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
+			acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
+			acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
+		}
+		/* Set PIC-mode SCI trigger type */
+		acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
+					 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
+	} else {
+		/*
+		 * now that acpi_gbl_FADT is initialized,
+		 * update it with result from INT_SRC_OVR parsing
+		 */
+		acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
+	}
+#endif
+	return;
+
+ error0:
+	disable_acpi();
+}
+
+/**
+ * acpi_subsystem_init - Finalize the early initialization of ACPI.
+ *
+ * Switch over the platform to the ACPI mode (if possible), initialize the
+ * handling of ACPI events, install the interrupt and global lock handlers.
+ *
+ * Doing this too early is generally unsafe, but at the same time it needs to be
+ * done before all things that really depend on ACPI.  The right spot appears to
+ * be before finalizing the EFI initialization.
+ */
+void __init acpi_subsystem_init(void)
+{
+	acpi_status status;
+
+	if (acpi_disabled)
+		return;
+
+	status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
+		disable_acpi();
+	} else {
+		/*
+		 * If the system is using ACPI then we can be reasonably
+		 * confident that any regulators are managed by the firmware
+		 * so tell the regulator core it has everything it needs to
+		 * know.
+		 */
+		regulator_has_full_constraints();
+	}
+}
+
+static int __init acpi_bus_init(void)
+{
+	int result;
+	acpi_status status;
+
+	acpi_os_initialize1();
+
+	status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX
+		       "Unable to start the ACPI Interpreter\n");
+		goto error1;
+	}
+
+	/*
+	 * ACPI 2.0 requires the EC driver to be loaded and work before
+	 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
+	 * is called).
+	 *
+	 * This is accomplished by looking for the ECDT table, and getting
+	 * the EC parameters out of that.
+	 */
+	status = acpi_ec_ecdt_probe();
+	/* Ignore result. Not having an ECDT is not fatal. */
+
+	status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
+		goto error1;
+	}
+
+	/*
+	 * _OSC method may exist in module level code,
+	 * so it must be run after ACPI_FULL_INITIALIZATION
+	 */
+	acpi_bus_osc_support();
+
+	/*
+	 * _PDC control method may load dynamic SSDT tables,
+	 * and we need to install the table handler before that.
+	 */
+	acpi_sysfs_init();
+
+	acpi_early_processor_set_pdc();
+
+	/*
+	 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
+	 * is necessary to enable it as early as possible.
+	 */
+	acpi_boot_ec_enable();
+
+	printk(KERN_INFO PREFIX "Interpreter enabled\n");
+
+	/* Initialize sleep structures */
+	acpi_sleep_init();
+
+	/*
+	 * Get the system interrupt model and evaluate \_PIC.
+	 */
+	result = acpi_bus_init_irq();
+	if (result)
+		goto error1;
+
+	/*
+	 * Register the for all standard device notifications.
+	 */
+	status =
+	    acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
+					&acpi_bus_notify, NULL);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX
+		       "Unable to register for device notifications\n");
+		goto error1;
+	}
+
+	/*
+	 * Create the top ACPI proc directory
+	 */
+	acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
+
+	return 0;
+
+	/* Mimic structured exception handling */
+      error1:
+	acpi_terminate();
+	return -ENODEV;
+}
+
+struct kobject *acpi_kobj;
+EXPORT_SYMBOL_GPL(acpi_kobj);
+
+static int __init acpi_init(void)
+{
+	int result;
+
+	if (acpi_disabled) {
+		printk(KERN_INFO PREFIX "Interpreter disabled.\n");
+		return -ENODEV;
+	}
+
+	acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
+	if (!acpi_kobj) {
+		printk(KERN_WARNING "%s: kset create error\n", __func__);
+		acpi_kobj = NULL;
+	}
+
+	init_acpi_device_notify();
+	result = acpi_bus_init();
+	if (result) {
+		disable_acpi();
+		return result;
+	}
+
+	pci_mmcfg_late_init();
+	acpi_scan_init();
+	acpi_ec_init();
+	acpi_debugfs_init();
+	acpi_sleep_proc_init();
+	acpi_wakeup_device_init();
+	return 0;
+}
+
+subsys_initcall(acpi_init);