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!
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
new file mode 100644
index 0000000..4edff17
--- /dev/null
+++ b/drivers/acpi/bus.c
@@ -0,0 +1,775 @@
+/*
+ * 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/list.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/proc_fs.h>
+#ifdef CONFIG_X86
+#include <asm/mpspec.h>
+#endif
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+
+#define _COMPONENT ACPI_BUS_COMPONENT
+ACPI_MODULE_NAME ("acpi_bus")
+
+#ifdef CONFIG_X86
+extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger);
+#endif
+
+FADT_DESCRIPTOR acpi_fadt;
+EXPORT_SYMBOL(acpi_fadt);
+
+struct acpi_device *acpi_root;
+struct proc_dir_entry *acpi_root_dir;
+EXPORT_SYMBOL(acpi_root_dir);
+
+#define STRUCT_TO_INT(s) (*((int*)&s))
+
+/* --------------------------------------------------------------------------
+ Device Management
+ -------------------------------------------------------------------------- */
+
+int
+acpi_bus_get_device (
+ acpi_handle handle,
+ struct acpi_device **device)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_get_device");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ /* TBD: Support fixed-feature devices */
+
+ status = acpi_get_data(handle, acpi_bus_data_handler, (void**) device);
+ if (ACPI_FAILURE(status) || !*device) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "No context for object [%p]\n",
+ handle));
+ return_VALUE(-ENODEV);
+ }
+
+ return_VALUE(0);
+}
+EXPORT_SYMBOL(acpi_bus_get_device);
+
+int
+acpi_bus_get_status (
+ struct acpi_device *device)
+{
+ acpi_status status = AE_OK;
+ unsigned long sta = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_get_status");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ /*
+ * Evaluate _STA if present.
+ */
+ if (device->flags.dynamic_status) {
+ status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+ STRUCT_TO_INT(device->status) = (int) sta;
+ }
+
+ /*
+ * Otherwise we assume the status of our parent (unless we don't
+ * have one, in which case status is implied).
+ */
+ else if (device->parent)
+ device->status = device->parent->status;
+ else
+ STRUCT_TO_INT(device->status) = 0x0F;
+
+ if (device->status.functional && !device->status.present) {
+ printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: "
+ "functional but not present; setting present\n",
+ device->pnp.bus_id,
+ (u32) STRUCT_TO_INT(device->status));
+ device->status.present = 1;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
+ device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)));
+
+ return_VALUE(0);
+}
+EXPORT_SYMBOL(acpi_bus_get_status);
+
+
+/* --------------------------------------------------------------------------
+ Power Management
+ -------------------------------------------------------------------------- */
+
+int
+acpi_bus_get_power (
+ acpi_handle handle,
+ int *state)
+{
+ int result = 0;
+ acpi_status status = 0;
+ struct acpi_device *device = NULL;
+ unsigned long psc = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_get_power");
+
+ result = acpi_bus_get_device(handle, &device);
+ if (result)
+ return_VALUE(result);
+
+ *state = ACPI_STATE_UNKNOWN;
+
+ if (!device->flags.power_manageable) {
+ /* TBD: Non-recursive algorithm for walking up hierarchy */
+ if (device->parent)
+ *state = device->parent->power.state;
+ else
+ *state = ACPI_STATE_D0;
+ }
+ else {
+ /*
+ * Get the device's power state either directly (via _PSC) or
+ * indirectly (via power resources).
+ */
+ if (device->power.flags.explicit_get) {
+ status = acpi_evaluate_integer(device->handle, "_PSC",
+ NULL, &psc);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+ device->power.state = (int) psc;
+ }
+ else if (device->power.flags.power_resources) {
+ result = acpi_power_get_inferred_state(device);
+ if (result)
+ return_VALUE(result);
+ }
+
+ *state = device->power.state;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
+ device->pnp.bus_id, device->power.state));
+
+ return_VALUE(0);
+}
+EXPORT_SYMBOL(acpi_bus_get_power);
+
+
+int
+acpi_bus_set_power (
+ acpi_handle handle,
+ int state)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_device *device = NULL;
+ char object_name[5] = {'_','P','S','0'+state,'\0'};
+
+ ACPI_FUNCTION_TRACE("acpi_bus_set_power");
+
+ result = acpi_bus_get_device(handle, &device);
+ if (result)
+ return_VALUE(result);
+
+ if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
+ return_VALUE(-EINVAL);
+
+ /* Make sure this is a valid target state */
+
+ if (!device->flags.power_manageable) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device is not power manageable\n"));
+ return_VALUE(-ENODEV);
+ }
+ if (state == device->power.state) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state));
+ return_VALUE(0);
+ }
+ if (!device->power.states[state].flags.valid) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device does not support D%d\n", state));
+ return_VALUE(-ENODEV);
+ }
+ if (device->parent && (state < device->parent->power.state)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Cannot set device to a higher-powered state than parent\n"));
+ return_VALUE(-ENODEV);
+ }
+
+ /*
+ * Transition Power
+ * ----------------
+ * On transitions to a high-powered state we first apply power (via
+ * power resources) then evalute _PSx. Conversly for transitions to
+ * a lower-powered state.
+ */
+ if (state < device->power.state) {
+ if (device->power.flags.power_resources) {
+ result = acpi_power_transition(device, state);
+ if (result)
+ goto end;
+ }
+ if (device->power.states[state].flags.explicit_set) {
+ status = acpi_evaluate_object(device->handle,
+ object_name, NULL, NULL);
+ if (ACPI_FAILURE(status)) {
+ result = -ENODEV;
+ goto end;
+ }
+ }
+ }
+ else {
+ if (device->power.states[state].flags.explicit_set) {
+ status = acpi_evaluate_object(device->handle,
+ object_name, NULL, NULL);
+ if (ACPI_FAILURE(status)) {
+ result = -ENODEV;
+ goto end;
+ }
+ }
+ if (device->power.flags.power_resources) {
+ result = acpi_power_transition(device, state);
+ if (result)
+ goto end;
+ }
+ }
+
+end:
+ if (result)
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Error transitioning device [%s] to D%d\n",
+ device->pnp.bus_id, state));
+ else
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] transitioned to D%d\n",
+ device->pnp.bus_id, state));
+
+ return_VALUE(result);
+}
+EXPORT_SYMBOL(acpi_bus_set_power);
+
+
+
+/* --------------------------------------------------------------------------
+ Event Management
+ -------------------------------------------------------------------------- */
+
+static DEFINE_SPINLOCK(acpi_bus_event_lock);
+
+LIST_HEAD(acpi_bus_event_list);
+DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
+
+extern int event_is_open;
+
+int
+acpi_bus_generate_event (
+ struct acpi_device *device,
+ u8 type,
+ int data)
+{
+ struct acpi_bus_event *event = NULL;
+ unsigned long flags = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_generate_event");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ /* drop event on the floor if no one's listening */
+ if (!event_is_open)
+ return_VALUE(0);
+
+ event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
+ if (!event)
+ return_VALUE(-ENOMEM);
+
+ strcpy(event->device_class, device->pnp.device_class);
+ strcpy(event->bus_id, device->pnp.bus_id);
+ event->type = type;
+ event->data = data;
+
+ spin_lock_irqsave(&acpi_bus_event_lock, flags);
+ list_add_tail(&event->node, &acpi_bus_event_list);
+ spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
+
+ wake_up_interruptible(&acpi_bus_event_queue);
+
+ return_VALUE(0);
+}
+EXPORT_SYMBOL(acpi_bus_generate_event);
+
+int
+acpi_bus_receive_event (
+ struct acpi_bus_event *event)
+{
+ unsigned long flags = 0;
+ struct acpi_bus_event *entry = NULL;
+
+ DECLARE_WAITQUEUE(wait, current);
+
+ ACPI_FUNCTION_TRACE("acpi_bus_receive_event");
+
+ if (!event)
+ return_VALUE(-EINVAL);
+
+ if (list_empty(&acpi_bus_event_list)) {
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&acpi_bus_event_queue, &wait);
+
+ if (list_empty(&acpi_bus_event_list))
+ schedule();
+
+ remove_wait_queue(&acpi_bus_event_queue, &wait);
+ set_current_state(TASK_RUNNING);
+
+ if (signal_pending(current))
+ return_VALUE(-ERESTARTSYS);
+ }
+
+ spin_lock_irqsave(&acpi_bus_event_lock, flags);
+ entry = list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node);
+ if (entry)
+ list_del(&entry->node);
+ spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
+
+ if (!entry)
+ return_VALUE(-ENODEV);
+
+ memcpy(event, entry, sizeof(struct acpi_bus_event));
+
+ kfree(entry);
+
+ return_VALUE(0);
+}
+EXPORT_SYMBOL(acpi_bus_receive_event);
+
+
+/* --------------------------------------------------------------------------
+ Notification Handling
+ -------------------------------------------------------------------------- */
+
+static int
+acpi_bus_check_device (
+ struct acpi_device *device,
+ int *status_changed)
+{
+ acpi_status status = 0;
+ struct acpi_device_status old_status;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_check_device");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ if (status_changed)
+ *status_changed = 0;
+
+ old_status = device->status;
+
+ /*
+ * Make sure this device's parent is present before we go about
+ * messing with the device.
+ */
+ if (device->parent && !device->parent->status.present) {
+ device->status = device->parent->status;
+ if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) {
+ if (status_changed)
+ *status_changed = 1;
+ }
+ return_VALUE(0);
+ }
+
+ status = acpi_bus_get_status(device);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
+ return_VALUE(0);
+
+ if (status_changed)
+ *status_changed = 1;
+
+ /*
+ * Device Insertion/Removal
+ */
+ if ((device->status.present) && !(old_status.present)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
+ /* TBD: Handle device insertion */
+ }
+ else if (!(device->status.present) && (old_status.present)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
+ /* TBD: Handle device removal */
+ }
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_bus_check_scope (
+ struct acpi_device *device)
+{
+ int result = 0;
+ int status_changed = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_check_scope");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ /* Status Change? */
+ result = acpi_bus_check_device(device, &status_changed);
+ if (result)
+ return_VALUE(result);
+
+ if (!status_changed)
+ return_VALUE(0);
+
+ /*
+ * TBD: Enumerate child devices within this device's scope and
+ * run acpi_bus_check_device()'s on them.
+ */
+
+ return_VALUE(0);
+}
+
+
+/**
+ * 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)
+{
+ int result = 0;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_notify");
+
+ if (acpi_bus_get_device(handle, &device))
+ return_VOID;
+
+ switch (type) {
+
+ case ACPI_NOTIFY_BUS_CHECK:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received BUS CHECK notification for device [%s]\n",
+ device->pnp.bus_id));
+ result = acpi_bus_check_scope(device);
+ /*
+ * TBD: We'll need to outsource certain events to non-ACPI
+ * drivers via the device manager (device.c).
+ */
+ break;
+
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received DEVICE CHECK notification for device [%s]\n",
+ device->pnp.bus_id));
+ result = acpi_bus_check_device(device, NULL);
+ /*
+ * TBD: We'll need to outsource certain events to non-ACPI
+ * drivers via the device manager (device.c).
+ */
+ break;
+
+ case ACPI_NOTIFY_DEVICE_WAKE:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received DEVICE WAKE notification for device [%s]\n",
+ device->pnp.bus_id));
+ /* TBD */
+ break;
+
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received EJECT REQUEST notification for device [%s]\n",
+ device->pnp.bus_id));
+ /* TBD */
+ break;
+
+ case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received DEVICE CHECK LIGHT notification for device [%s]\n",
+ device->pnp.bus_id));
+ /* TBD: Exactly what does 'light' mean? */
+ break;
+
+ case ACPI_NOTIFY_FREQUENCY_MISMATCH:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received FREQUENCY MISMATCH notification for device [%s]\n",
+ device->pnp.bus_id));
+ /* TBD */
+ break;
+
+ case ACPI_NOTIFY_BUS_MODE_MISMATCH:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received BUS MODE MISMATCH notification for device [%s]\n",
+ device->pnp.bus_id));
+ /* TBD */
+ break;
+
+ case ACPI_NOTIFY_POWER_FAULT:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received POWER FAULT notification for device [%s]\n",
+ device->pnp.bus_id));
+ /* TBD */
+ break;
+
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received unknown/unsupported notification [%08x]\n",
+ type));
+ break;
+ }
+
+ return_VOID;
+}
+
+/* --------------------------------------------------------------------------
+ Initialization/Cleanup
+ -------------------------------------------------------------------------- */
+
+static int __init
+acpi_bus_init_irq (void)
+{
+ acpi_status status = AE_OK;
+ union acpi_object arg = {ACPI_TYPE_INTEGER};
+ struct acpi_object_list arg_list = {1, &arg};
+ char *message = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_init_irq");
+
+ /*
+ * 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;
+ default:
+ printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
+ return_VALUE(-ENODEV);
+ }
+
+ printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
+
+ arg.integer.value = acpi_irq_model;
+
+ status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
+ if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _PIC\n"));
+ return_VALUE(-ENODEV);
+ }
+
+ return_VALUE(0);
+}
+
+
+void __init
+acpi_early_init (void)
+{
+ acpi_status status = AE_OK;
+ struct acpi_buffer buffer = {sizeof(acpi_fadt), &acpi_fadt};
+
+ ACPI_FUNCTION_TRACE("acpi_early_init");
+
+ if (acpi_disabled)
+ return_VOID;
+
+ /* enable workarounds, unless strict ACPI spec. compliance */
+ if (!acpi_strict)
+ acpi_gbl_enable_interpreter_slack = TRUE;
+
+ 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;
+ }
+
+ /*
+ * Get a separate copy of the FADT for use by other drivers.
+ */
+ status = acpi_get_table(ACPI_TABLE_FADT, 1, &buffer);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Unable to get the FADT\n");
+ goto error0;
+ }
+
+#ifdef CONFIG_X86
+ if (!acpi_ioapic) {
+ extern acpi_interrupt_flags acpi_sci_flags;
+
+ /* compatible (0) means level (3) */
+ if (acpi_sci_flags.trigger == 0)
+ acpi_sci_flags.trigger = 3;
+
+ /* Set PIC-mode SCI trigger type */
+ acpi_pic_sci_set_trigger(acpi_fadt.sci_int, acpi_sci_flags.trigger);
+ } else {
+ extern int acpi_sci_override_gsi;
+ /*
+ * now that acpi_fadt is initialized,
+ * update it with result from INT_SRC_OVR parsing
+ */
+ acpi_fadt.sci_int = acpi_sci_override_gsi;
+ }
+#endif
+
+ status = acpi_enable_subsystem(~(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE));
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
+ goto error0;
+ }
+
+ return_VOID;
+
+error0:
+ disable_acpi();
+ return_VOID;
+}
+
+static int __init
+acpi_bus_init (void)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ extern acpi_status acpi_os_initialize1(void);
+
+ ACPI_FUNCTION_TRACE("acpi_bus_init");
+
+ status = acpi_os_initialize1();
+
+ status = acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Unable to start the ACPI Interpreter\n");
+ goto error1;
+ }
+
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Unable to initialize ACPI OS objects\n");
+ goto error1;
+ }
+#ifdef CONFIG_ACPI_EC
+ /*
+ * 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. */
+#endif
+
+ status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
+ goto error1;
+ }
+
+ printk(KERN_INFO PREFIX "Interpreter enabled\n");
+
+ /*
+ * 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_VALUE(0);
+
+ /* Mimic structured exception handling */
+error1:
+ acpi_terminate();
+ return_VALUE(-ENODEV);
+}
+
+decl_subsys(acpi,NULL,NULL);
+
+static int __init acpi_init (void)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_init");
+
+ printk(KERN_INFO PREFIX "Subsystem revision %08x\n",
+ ACPI_CA_VERSION);
+
+ if (acpi_disabled) {
+ printk(KERN_INFO PREFIX "Interpreter disabled.\n");
+ return_VALUE(-ENODEV);
+ }
+
+ firmware_register(&acpi_subsys);
+
+ result = acpi_bus_init();
+
+ if (!result) {
+#ifdef CONFIG_PM
+ if (!PM_IS_ACTIVE())
+ pm_active = 1;
+ else {
+ printk(KERN_INFO PREFIX "APM is already active, exiting\n");
+ disable_acpi();
+ result = -ENODEV;
+ }
+#endif
+ } else
+ disable_acpi();
+
+ return_VALUE(result);
+}
+
+subsys_initcall(acpi_init);