1 files changed, 378 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exsystem.c b/drivers/acpi/executer/exsystem.c
new file mode 100644
index 00000000000..f92efc51289
--- /dev/null
+++ b/drivers/acpi/executer/exsystem.c
@@ -0,0 +1,378 @@
+
+/******************************************************************************
+ *
+ * Module Name: exsystem - Interface to OS services
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acinterp.h>
+#include <acpi/acevents.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+	 ACPI_MODULE_NAME    ("exsystem")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_wait_semaphore
+ *
+ * PARAMETERS:  Semaphore           - OSD semaphore to wait on
+ *              Timeout             - Max time to wait
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Implements a semaphore wait with a check to see if the
+ *              semaphore is available immediately.  If it is not, the
+ *              interpreter is released.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_wait_semaphore (
+	acpi_handle                     semaphore,
+	u16                             timeout)
+{
+	acpi_status                     status;
+	acpi_status                     status2;
+
+
+	ACPI_FUNCTION_TRACE ("ex_system_wait_semaphore");
+
+
+	status = acpi_os_wait_semaphore (semaphore, 1, 0);
+	if (ACPI_SUCCESS (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	if (status == AE_TIME) {
+		/* We must wait, so unlock the interpreter */
+
+		acpi_ex_exit_interpreter ();
+
+		status = acpi_os_wait_semaphore (semaphore, 1, timeout);
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "*** Thread awake after blocking, %s\n",
+			acpi_format_exception (status)));
+
+		/* Reacquire the interpreter */
+
+		status2 = acpi_ex_enter_interpreter ();
+		if (ACPI_FAILURE (status2)) {
+			/* Report fatal error, could not acquire interpreter */
+
+			return_ACPI_STATUS (status2);
+		}
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_do_stall
+ *
+ * PARAMETERS:  how_long            - The amount of time to stall,
+ *                                    in microseconds
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Suspend running thread for specified amount of time.
+ *              Note: ACPI specification requires that Stall() does not
+ *              relinquish the processor, and delays longer than 100 usec
+ *              should use Sleep() instead.  We allow stalls up to 255 usec
+ *              for compatibility with other interpreters and existing BIOSs.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_do_stall (
+	u32                             how_long)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	if (how_long > 255) /* 255 microseconds */ {
+		/*
+		 * Longer than 255 usec, this is an error
+		 *
+		 * (ACPI specifies 100 usec as max, but this gives some slack in
+		 * order to support existing BIOSs)
+		 */
+		ACPI_REPORT_ERROR (("Stall: Time parameter is too large (%d)\n", how_long));
+		status = AE_AML_OPERAND_VALUE;
+	}
+	else {
+		acpi_os_stall (how_long);
+	}
+
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_do_suspend
+ *
+ * PARAMETERS:  how_long            - The amount of time to suspend,
+ *                                    in milliseconds
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Suspend running thread for specified amount of time.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_do_suspend (
+	acpi_integer                    how_long)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/* Since this thread will sleep, we must release the interpreter */
+
+	acpi_ex_exit_interpreter ();
+
+	acpi_os_sleep (how_long);
+
+	/* And now we must get the interpreter again */
+
+	status = acpi_ex_enter_interpreter ();
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_acquire_mutex
+ *
+ * PARAMETERS:  *time_desc          - The 'time to delay' object descriptor
+ *              *obj_desc           - The object descriptor for this op
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Provides an access point to perform synchronization operations
+ *              within the AML.  This function will cause a lock to be generated
+ *              for the Mutex pointed to by obj_desc.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_acquire_mutex (
+	union acpi_operand_object       *time_desc,
+	union acpi_operand_object       *obj_desc)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE_PTR ("ex_system_acquire_mutex", obj_desc);
+
+
+	if (!obj_desc) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Support for the _GL_ Mutex object -- go get the global lock
+	 */
+	if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) {
+		status = acpi_ev_acquire_global_lock ((u16) time_desc->integer.value);
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_ex_system_wait_semaphore (obj_desc->mutex.semaphore,
+			  (u16) time_desc->integer.value);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_release_mutex
+ *
+ * PARAMETERS:  *obj_desc           - The object descriptor for this op
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Provides an access point to perform synchronization operations
+ *              within the AML.  This operation is a request to release a
+ *              previously acquired Mutex.  If the Mutex variable is set then
+ *              it will be decremented.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_release_mutex (
+	union acpi_operand_object       *obj_desc)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("ex_system_release_mutex");
+
+
+	if (!obj_desc) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Support for the _GL_ Mutex object -- release the global lock
+	 */
+	if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) {
+		status = acpi_ev_release_global_lock ();
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_os_signal_semaphore (obj_desc->mutex.semaphore, 1);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_signal_event
+ *
+ * PARAMETERS:  *obj_desc           - The object descriptor for this op
+ *
+ * RETURN:      AE_OK
+ *
+ * DESCRIPTION: Provides an access point to perform synchronization operations
+ *              within the AML.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_signal_event (
+	union acpi_operand_object       *obj_desc)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("ex_system_signal_event");
+
+
+	if (obj_desc) {
+		status = acpi_os_signal_semaphore (obj_desc->event.semaphore, 1);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_wait_event
+ *
+ * PARAMETERS:  *time_desc          - The 'time to delay' object descriptor
+ *              *obj_desc           - The object descriptor for this op
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Provides an access point to perform synchronization operations
+ *              within the AML.  This operation is a request to wait for an
+ *              event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_wait_event (
+	union acpi_operand_object       *time_desc,
+	union acpi_operand_object       *obj_desc)
+{
+	acpi_status                     status = AE_OK;
+
+
+	ACPI_FUNCTION_TRACE ("ex_system_wait_event");
+
+
+	if (obj_desc) {
+		status = acpi_ex_system_wait_semaphore (obj_desc->event.semaphore,
+				  (u16) time_desc->integer.value);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_reset_event
+ *
+ * PARAMETERS:  *obj_desc           - The object descriptor for this op
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Reset an event to a known state.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_reset_event (
+	union acpi_operand_object       *obj_desc)
+{
+	acpi_status                     status = AE_OK;
+	void                            *temp_semaphore;
+
+
+	ACPI_FUNCTION_ENTRY ();
+
+
+	/*
+	 * We are going to simply delete the existing semaphore and
+	 * create a new one!
+	 */
+	status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT, 0, &temp_semaphore);
+	if (ACPI_SUCCESS (status)) {
+		(void) acpi_os_delete_semaphore (obj_desc->event.semaphore);
+		obj_desc->event.semaphore = temp_semaphore;
+	}
+
+	return (status);
+}
+