MFV: ACPICA 20090521

1 files changed, 278 insertions, 0 deletions

diff --git a/sys/contrib/dev/acpica/hardware/hwacpi.c b/sys/contrib/dev/acpica/hardware/hwacpi.c
new file mode 100644
index 000000000000..6b6d90ee02e7
--- /dev/null
+++ b/sys/contrib/dev/acpica/hardware/hwacpi.c
@@ -0,0 +1,278 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
+ * All rights reserved.
+ *
+ * 2. License
+ *
+ * 2.1. This is your license from Intel Corp. under its intellectual property
+ * rights.  You may have additional license terms from the party that provided
+ * you this software, covering your right to use that party's intellectual
+ * property rights.
+ *
+ * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
+ * copy of the source code appearing in this file ("Covered Code") an
+ * irrevocable, perpetual, worldwide license under Intel's copyrights in the
+ * base code distributed originally by Intel ("Original Intel Code") to copy,
+ * make derivatives, distribute, use and display any portion of the Covered
+ * Code in any form, with the right to sublicense such rights; and
+ *
+ * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
+ * license (with the right to sublicense), under only those claims of Intel
+ * patents that are infringed by the Original Intel Code, to make, use, sell,
+ * offer to sell, and import the Covered Code and derivative works thereof
+ * solely to the minimum extent necessary to exercise the above copyright
+ * license, and in no event shall the patent license extend to any additions
+ * to or modifications of the Original Intel Code.  No other license or right
+ * is granted directly or by implication, estoppel or otherwise;
+ *
+ * The above copyright and patent license is granted only if the following
+ * conditions are met:
+ *
+ * 3. Conditions
+ *
+ * 3.1. Redistribution of Source with Rights to Further Distribute Source.
+ * Redistribution of source code of any substantial portion of the Covered
+ * Code or modification with rights to further distribute source must include
+ * the above Copyright Notice, the above License, this list of Conditions,
+ * and the following Disclaimer and Export Compliance provision.  In addition,
+ * Licensee must cause all Covered Code to which Licensee contributes to
+ * contain a file documenting the changes Licensee made to create that Covered
+ * Code and the date of any change.  Licensee must include in that file the
+ * documentation of any changes made by any predecessor Licensee.  Licensee
+ * must include a prominent statement that the modification is derived,
+ * directly or indirectly, from Original Intel Code.
+ *
+ * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
+ * Redistribution of source code of any substantial portion of the Covered
+ * Code or modification without rights to further distribute source must
+ * include the following Disclaimer and Export Compliance provision in the
+ * documentation and/or other materials provided with distribution.  In
+ * addition, Licensee may not authorize further sublicense of source of any
+ * portion of the Covered Code, and must include terms to the effect that the
+ * license from Licensee to its licensee is limited to the intellectual
+ * property embodied in the software Licensee provides to its licensee, and
+ * not to intellectual property embodied in modifications its licensee may
+ * make.
+ *
+ * 3.3. Redistribution of Executable. Redistribution in executable form of any
+ * substantial portion of the Covered Code or modification must reproduce the
+ * above Copyright Notice, and the following Disclaimer and Export Compliance
+ * provision in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3.4. Intel retains all right, title, and interest in and to the Original
+ * Intel Code.
+ *
+ * 3.5. Neither the name Intel nor any other trademark owned or controlled by
+ * Intel shall be used in advertising or otherwise to promote the sale, use or
+ * other dealings in products derived from or relating to the Covered Code
+ * without prior written authorization from Intel.
+ *
+ * 4. Disclaimer and Export Compliance
+ *
+ * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
+ * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
+ * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
+ * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
+ * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
+ * PARTICULAR PURPOSE.
+ *
+ * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
+ * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
+ * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
+ * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
+ * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
+ * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
+ * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
+ * LIMITED REMEDY.
+ *
+ * 4.3. Licensee shall not export, either directly or indirectly, any of this
+ * software or system incorporating such software without first obtaining any
+ * required license or other approval from the U. S. Department of Commerce or
+ * any other agency or department of the United States Government.  In the
+ * event Licensee exports any such software from the United States or
+ * re-exports any such software from a foreign destination, Licensee shall
+ * ensure that the distribution and export/re-export of the software is in
+ * compliance with all laws, regulations, orders, or other restrictions of the
+ * U.S. Export Administration Regulations. Licensee agrees that neither it nor
+ * any of its subsidiaries will export/re-export any technical data, process,
+ * software, or service, directly or indirectly, to any country for which the
+ * United States government or any agency thereof requires an export license,
+ * other governmental approval, or letter of assurance, without first obtaining
+ * such license, approval or letter.
+ *
+ *****************************************************************************/
+
+#define __HWACPI_C__
+
+#include "acpi.h"
+#include "accommon.h"
+
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwacpi")
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiHwSetMode
+ *
+ * PARAMETERS:  Mode            - SYS_MODE_ACPI or SYS_MODE_LEGACY
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transitions the system into the requested mode.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiHwSetMode (
+    UINT32                  Mode)
+{
+
+    ACPI_STATUS             Status;
+    UINT32                  Retry;
+
+
+    ACPI_FUNCTION_TRACE (HwSetMode);
+
+    /*
+     * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+     * system does not support mode transition.
+     */
+    if (!AcpiGbl_FADT.SmiCommand)
+    {
+        ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed"));
+        return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+    }
+
+    /*
+     * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE
+     * in FADT: If it is zero, enabling or disabling is not supported.
+     * As old systems may have used zero for mode transition,
+     * we make sure both the numbers are zero to determine these
+     * transitions are not supported.
+     */
+    if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable)
+    {
+        ACPI_ERROR ((AE_INFO,
+            "No ACPI mode transition supported in this system "
+            "(enable/disable both zero)"));
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    switch (Mode)
+    {
+    case ACPI_SYS_MODE_ACPI:
+
+        /* BIOS should have disabled ALL fixed and GP events */
+
+        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
+                        (UINT32) AcpiGbl_FADT.AcpiEnable, 8);
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n"));
+        break;
+
+    case ACPI_SYS_MODE_LEGACY:
+
+        /*
+         * BIOS should clear all fixed status bits and restore fixed event
+         * enable bits to default
+         */
+        Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
+                    (UINT32) AcpiGbl_FADT.AcpiDisable, 8);
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                    "Attempting to enable Legacy (non-ACPI) mode\n"));
+        break;
+
+    default:
+        return_ACPI_STATUS (AE_BAD_PARAMETER);
+    }
+
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status,
+            "Could not write ACPI mode change"));
+        return_ACPI_STATUS (Status);
+    }
+
+    /*
+     * Some hardware takes a LONG time to switch modes. Give them 3 sec to
+     * do so, but allow faster systems to proceed more quickly.
+     */
+    Retry = 3000;
+    while (Retry)
+    {
+        if (AcpiHwGetMode() == Mode)
+        {
+            ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n",
+                Mode));
+            return_ACPI_STATUS (AE_OK);
+        }
+        AcpiOsStall(1000);
+        Retry--;
+    }
+
+    ACPI_ERROR ((AE_INFO, "Hardware did not change modes"));
+    return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiHwGetMode
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      SYS_MODE_ACPI or SYS_MODE_LEGACY
+ *
+ * DESCRIPTION: Return current operating state of system.  Determined by
+ *              querying the SCI_EN bit.
+ *
+ ******************************************************************************/
+
+UINT32
+AcpiHwGetMode (
+    void)
+{
+    ACPI_STATUS             Status;
+    UINT32                  Value;
+
+
+    ACPI_FUNCTION_TRACE (HwGetMode);
+
+
+    /*
+     * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+     * system does not support mode transition.
+     */
+    if (!AcpiGbl_FADT.SmiCommand)
+    {
+        return_UINT32 (ACPI_SYS_MODE_ACPI);
+    }
+
+    Status = AcpiReadBitRegister (ACPI_BITREG_SCI_ENABLE, &Value);
+    if (ACPI_FAILURE (Status))
+    {
+        return_UINT32 (ACPI_SYS_MODE_LEGACY);
+    }
+
+    if (Value)
+    {
+        return_UINT32 (ACPI_SYS_MODE_ACPI);
+    }
+    else
+    {
+        return_UINT32 (ACPI_SYS_MODE_LEGACY);
+    }
+}