Merge branch 'linus' into x86/setup-lzma

Conflicts:
	init/do_mounts_rd.c

1 files changed, 313 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c
new file mode 100644
index 000000000000..803edd9e3f6a
--- /dev/null
+++ b/drivers/acpi/acpica/evevent.c
@@ -0,0 +1,313 @@
+/******************************************************************************
+ *
+ * Module Name: evevent - Fixed Event handling and dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * 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 "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evevent")
+
+/* Local prototypes */
+static acpi_status acpi_ev_fixed_event_initialize(void);
+
+static u32 acpi_ev_fixed_event_dispatch(u32 event);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_events
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize global data structures for ACPI events (Fixed, GPE)
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_initialize_events(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_initialize_events);
+
+	/*
+	 * Initialize the Fixed and General Purpose Events. This is done prior to
+	 * enabling SCIs to prevent interrupts from occurring before the handlers
+	 * are installed.
+	 */
+	status = acpi_ev_fixed_event_initialize();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Unable to initialize fixed events"));
+		return_ACPI_STATUS(status);
+	}
+
+	status = acpi_ev_gpe_initialize();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Unable to initialize general purpose events"));
+		return_ACPI_STATUS(status);
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_fadt_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
+ *              (0 and 1). This causes the _PRW methods to be run, so the HW
+ *              must be fully initialized at this point, including global lock
+ *              support.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_install_fadt_gpes(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_install_fadt_gpes);
+
+	/* Namespace must be locked */
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/* FADT GPE Block 0 */
+
+	(void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
+					   acpi_gbl_gpe_fadt_blocks[0]);
+
+	/* FADT GPE Block 1 */
+
+	(void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
+					   acpi_gbl_gpe_fadt_blocks[1]);
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_xrupt_handlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install interrupt handlers for the SCI and Global Lock
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_install_xrupt_handlers(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_install_xrupt_handlers);
+
+	/* Install the SCI handler */
+
+	status = acpi_ev_install_sci_handler();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Unable to install System Control Interrupt handler"));
+		return_ACPI_STATUS(status);
+	}
+
+	/* Install the handler for the Global Lock */
+
+	status = acpi_ev_init_global_lock_handler();
+	if (ACPI_FAILURE(status)) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Unable to initialize Global Lock handler"));
+		return_ACPI_STATUS(status);
+	}
+
+	acpi_gbl_events_initialized = TRUE;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_fixed_event_initialize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install the fixed event handlers and enable the fixed events.
+ *
+ ******************************************************************************/
+
+static acpi_status acpi_ev_fixed_event_initialize(void)
+{
+	u32 i;
+	acpi_status status;
+
+	/*
+	 * Initialize the structure that keeps track of fixed event handlers and
+	 * enable the fixed events.
+	 */
+	for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+		acpi_gbl_fixed_event_handlers[i].handler = NULL;
+		acpi_gbl_fixed_event_handlers[i].context = NULL;
+
+		/* Enable the fixed event */
+
+		if (acpi_gbl_fixed_event_info[i].enable_register_id != 0xFF) {
+			status =
+			    acpi_set_register(acpi_gbl_fixed_event_info[i].
+					      enable_register_id, 0);
+			if (ACPI_FAILURE(status)) {
+				return (status);
+			}
+		}
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_fixed_event_detect
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Checks the PM status register for active fixed events
+ *
+ ******************************************************************************/
+
+u32 acpi_ev_fixed_event_detect(void)
+{
+	u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
+	u32 fixed_status;
+	u32 fixed_enable;
+	u32 i;
+
+	ACPI_FUNCTION_NAME(ev_fixed_event_detect);
+
+	/*
+	 * Read the fixed feature status and enable registers, as all the cases
+	 * depend on their values. Ignore errors here.
+	 */
+	(void)acpi_hw_register_read(ACPI_REGISTER_PM1_STATUS, &fixed_status);
+	(void)acpi_hw_register_read(ACPI_REGISTER_PM1_ENABLE, &fixed_enable);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
+			  "Fixed Event Block: Enable %08X Status %08X\n",
+			  fixed_enable, fixed_status));
+
+	/*
+	 * Check for all possible Fixed Events and dispatch those that are active
+	 */
+	for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
+
+		/* Both the status and enable bits must be on for this event */
+
+		if ((fixed_status & acpi_gbl_fixed_event_info[i].
+		     status_bit_mask)
+		    && (fixed_enable & acpi_gbl_fixed_event_info[i].
+			enable_bit_mask)) {
+
+			/* Found an active (signalled) event */
+			acpi_os_fixed_event_count(i);
+			int_status |= acpi_ev_fixed_event_dispatch(i);
+		}
+	}
+
+	return (int_status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_fixed_event_dispatch
+ *
+ * PARAMETERS:  Event               - Event type
+ *
+ * RETURN:      INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
+ *
+ * DESCRIPTION: Clears the status bit for the requested event, calls the
+ *              handler that previously registered for the event.
+ *
+ ******************************************************************************/
+
+static u32 acpi_ev_fixed_event_dispatch(u32 event)
+{
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Clear the status bit */
+
+	(void)acpi_set_register(acpi_gbl_fixed_event_info[event].
+				status_register_id, 1);
+
+	/*
+	 * Make sure we've got a handler. If not, report an error. The event is
+	 * disabled to prevent further interrupts.
+	 */
+	if (NULL == acpi_gbl_fixed_event_handlers[event].handler) {
+		(void)acpi_set_register(acpi_gbl_fixed_event_info[event].
+					enable_register_id, 0);
+
+		ACPI_ERROR((AE_INFO,
+			    "No installed handler for fixed event [%08X]",
+			    event));
+
+		return (ACPI_INTERRUPT_NOT_HANDLED);
+	}
+
+	/* Invoke the Fixed Event handler */
+
+	return ((acpi_gbl_fixed_event_handlers[event].
+		 handler) (acpi_gbl_fixed_event_handlers[event].context));
+}