Merge ACPICA 20120215.

1 files changed, 209 insertions, 0 deletions

diff --git a/sys/contrib/dev/acpica/components/hardware/hwacpi.c b/sys/contrib/dev/acpica/components/hardware/hwacpi.c
new file mode 100644
index 0000000..a7bc6b8
--- /dev/null
+++ b/sys/contrib/dev/acpica/components/hardware/hwacpi.c
@@ -0,0 +1,209 @@
+
+/******************************************************************************
+ *
+ * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface
+ *
+ *****************************************************************************/
+
+/*
+ * 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.
+ */
+
+#define __HWACPI_C__
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+
+
+#define _COMPONENT          ACPI_HARDWARE
+        ACPI_MODULE_NAME    ("hwacpi")
+
+
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
+/******************************************************************************
+ *
+ * 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);
+    }
+}
+
+#endif /* !ACPI_REDUCED_HARDWARE */