Import ACPICA 20120215.vendor/acpica/20120215

1 files changed, 263 insertions, 0 deletions

diff --git a/source/components/hardware/hwesleep.c b/source/components/hardware/hwesleep.c
new file mode 100644
index 000000000000..e95647e5cd19
--- /dev/null
+++ b/source/components/hardware/hwesleep.c
@@ -0,0 +1,263 @@
+/******************************************************************************
+ *
+ * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the
+ *                    extended FADT-V5 sleep registers.
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, 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.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwesleep")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwExecuteSleepMethod
+ *
+ * PARAMETERS:  MethodName          - Pathname of method to execute
+ *              IntegerArgument     - Argument to pass to the method
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Execute a sleep/wake related method with one integer argument
+ *              and no return value.
+ *
+ ******************************************************************************/
+
+void
+AcpiHwExecuteSleepMethod (
+    char                    *MethodName,
+    UINT32                  IntegerArgument)
+{
+    ACPI_OBJECT_LIST        ArgList;
+    ACPI_OBJECT             Arg;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (HwExecuteSleepMethod);
+
+
+    /* One argument, IntegerArgument; No return value expected */
+
+    ArgList.Count = 1;
+    ArgList.Pointer = &Arg;
+    Arg.Type = ACPI_TYPE_INTEGER;
+    Arg.Integer.Value = (UINT64) IntegerArgument;
+
+    Status = AcpiEvaluateObject (NULL, MethodName, &ArgList, NULL);
+    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status, "While executing method %s",
+            MethodName));
+    }
+
+    return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwExtendedSleep
+ *
+ * PARAMETERS:  SleepState          - Which sleep state to enter
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enter a system sleep state via the extended FADT sleep
+ *              registers (V5 FADT).
+ *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwExtendedSleep (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+    UINT8                   SleepTypeValue;
+    UINT64                  SleepStatus;
+
+
+    ACPI_FUNCTION_TRACE (HwExtendedSleep);
+
+
+    /* Extended sleep registers must be valid */
+
+    if (!AcpiGbl_FADT.SleepControl.Address ||
+        !AcpiGbl_FADT.SleepStatus.Address)
+    {
+        return_ACPI_STATUS (AE_NOT_EXIST);
+    }
+
+    /* Clear wake status (WAK_STS) */
+
+    Status = AcpiWrite (ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    AcpiGbl_SystemAwakeAndRunning = FALSE;
+
+    /* Execute the _GTS method (Going To Sleep) */
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__GTS, SleepState);
+
+    /* Flush caches, as per ACPI specification */
+
+    ACPI_FLUSH_CPU_CACHE ();
+
+    /*
+     * Set the SLP_TYP and SLP_EN bits.
+     *
+     * Note: We only use the first value returned by the \_Sx method
+     * (AcpiGbl_SleepTypeA) - As per ACPI specification.
+     */
+    ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
+        "Entering sleep state [S%u]\n", SleepState));
+
+    SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
+        ACPI_X_SLEEP_TYPE_MASK);
+
+    Status = AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE),
+        &AcpiGbl_FADT.SleepControl);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Wait for transition back to Working State */
+
+    do
+    {
+        Status = AcpiRead (&SleepStatus, &AcpiGbl_FADT.SleepStatus);
+        if (ACPI_FAILURE (Status))
+        {
+            return_ACPI_STATUS (Status);
+        }
+
+    } while (!(((UINT8) SleepStatus) & ACPI_X_WAKE_STATUS));
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwExtendedWakePrep
+ *
+ * PARAMETERS:  SleepState          - Which sleep state we just exited
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after
+ *              a sleep. Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwExtendedWakePrep (
+    UINT8                   SleepState)
+{
+    ACPI_STATUS             Status;
+    UINT8                   SleepTypeValue;
+
+
+    ACPI_FUNCTION_TRACE (HwExtendedWakePrep);
+
+
+    Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
+                    &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
+    if (ACPI_SUCCESS (Status))
+    {
+        SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
+            ACPI_X_SLEEP_TYPE_MASK);
+
+        (void) AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE),
+            &AcpiGbl_FADT.SleepControl);
+    }
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__BFS, SleepState);
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwExtendedWake
+ *
+ * PARAMETERS:  SleepState          - Which sleep state we just exited
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ *              Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwExtendedWake (
+    UINT8                   SleepState)
+{
+    ACPI_FUNCTION_TRACE (HwExtendedWake);
+
+
+    /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
+
+    AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
+
+    /* Execute the wake methods */
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WAKING);
+    AcpiHwExecuteSleepMethod (METHOD_NAME__WAK, SleepState);
+
+    /*
+     * Some BIOS code assumes that WAK_STS will be cleared on resume
+     * and use it to determine whether the system is rebooting or
+     * resuming. Clear WAK_STS for compatibility.
+     */
+    (void) AcpiWrite (ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
+    AcpiGbl_SystemAwakeAndRunning = TRUE;
+
+    AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WORKING);
+    return_ACPI_STATUS (AE_OK);
+}