1 files changed, 378 insertions, 0 deletions

diff --git a/drivers/acpi/executer/exutils.c b/drivers/acpi/executer/exutils.c
new file mode 100644
index 000000000000..40c6abb8b49a
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+++ b/drivers/acpi/executer/exutils.c
@@ -0,0 +1,378 @@
+
+/******************************************************************************
+ *
+ * Module Name: exutils - interpreter/scanner utilities
+ *
+ *****************************************************************************/
+
+/*
+ * 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.
+ */
+
+
+/*
+ * DEFINE_AML_GLOBALS is tested in amlcode.h
+ * to determine whether certain global names should be "defined" or only
+ * "declared" in the current compilation.  This enhances maintainability
+ * by enabling a single header file to embody all knowledge of the names
+ * in question.
+ *
+ * Exactly one module of any executable should #define DEFINE_GLOBALS
+ * before #including the header files which use this convention.  The
+ * names in question will be defined and initialized in that module,
+ * and declared as extern in all other modules which #include those
+ * header files.
+ */
+
+#define DEFINE_AML_GLOBALS
+
+#include <acpi/acpi.h>
+#include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
+#include <acpi/acevents.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+         ACPI_MODULE_NAME    ("exutils")
+
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_enter_interpreter
+ *
+ * PARAMETERS:  None
+ *
+ * DESCRIPTION: Enter the interpreter execution region.  Failure to enter
+ *              the interpreter region is a fatal system error
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_enter_interpreter (void)
+{
+        acpi_status                     status;
+
+        ACPI_FUNCTION_TRACE ("ex_enter_interpreter");
+
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_EXECUTE);
+        if (ACPI_FAILURE (status)) {
+                ACPI_REPORT_ERROR (("Could not acquire interpreter mutex\n"));
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_exit_interpreter
+ *
+ * PARAMETERS:  None
+ *
+ * DESCRIPTION: Exit the interpreter execution region
+ *
+ * Cases where the interpreter is unlocked:
+ *      1) Completion of the execution of a control method
+ *      2) Method blocked on a Sleep() AML opcode
+ *      3) Method blocked on an Acquire() AML opcode
+ *      4) Method blocked on a Wait() AML opcode
+ *      5) Method blocked to acquire the global lock
+ *      6) Method blocked to execute a serialized control method that is
+ *          already executing
+ *      7) About to invoke a user-installed opregion handler
+ *
+ ******************************************************************************/
+
+void
+acpi_ex_exit_interpreter (void)
+{
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("ex_exit_interpreter");
+
+
+        status = acpi_ut_release_mutex (ACPI_MTX_EXECUTE);
+        if (ACPI_FAILURE (status)) {
+                ACPI_REPORT_ERROR (("Could not release interpreter mutex\n"));
+        }
+
+        return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_truncate_for32bit_table
+ *
+ * PARAMETERS:  obj_desc        - Object to be truncated
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Truncate a number to 32-bits if the currently executing method
+ *              belongs to a 32-bit ACPI table.
+ *
+ ******************************************************************************/
+
+void
+acpi_ex_truncate_for32bit_table (
+        union acpi_operand_object       *obj_desc)
+{
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        /*
+         * Object must be a valid number and we must be executing
+         * a control method
+         */
+        if ((!obj_desc) ||
+                (ACPI_GET_OBJECT_TYPE (obj_desc) != ACPI_TYPE_INTEGER)) {
+                return;
+        }
+
+        if (acpi_gbl_integer_byte_width == 4) {
+                /*
+                 * We are running a method that exists in a 32-bit ACPI table.
+                 * Truncate the value to 32 bits by zeroing out the upper 32-bit field
+                 */
+                obj_desc->integer.value &= (acpi_integer) ACPI_UINT32_MAX;
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_acquire_global_lock
+ *
+ * PARAMETERS:  field_flags           - Flags with Lock rule:
+ *                                      always_lock or never_lock
+ *
+ * RETURN:      TRUE/FALSE indicating whether the lock was actually acquired
+ *
+ * DESCRIPTION: Obtain the global lock and keep track of this fact via two
+ *              methods.  A global variable keeps the state of the lock, and
+ *              the state is returned to the caller.
+ *
+ ******************************************************************************/
+
+u8
+acpi_ex_acquire_global_lock (
+        u32                             field_flags)
+{
+        u8                              locked = FALSE;
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("ex_acquire_global_lock");
+
+
+        /* Only attempt lock if the always_lock bit is set */
+
+        if (field_flags & AML_FIELD_LOCK_RULE_MASK) {
+                /* We should attempt to get the lock, wait forever */
+
+                status = acpi_ev_acquire_global_lock (ACPI_WAIT_FOREVER);
+                if (ACPI_SUCCESS (status)) {
+                        locked = TRUE;
+                }
+                else {
+                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not acquire Global Lock, %s\n",
+                                acpi_format_exception (status)));
+                }
+        }
+
+        return_VALUE (locked);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_release_global_lock
+ *
+ * PARAMETERS:  locked_by_me    - Return value from corresponding call to
+ *                                acquire_global_lock.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Release the global lock if it is locked.
+ *
+ ******************************************************************************/
+
+void
+acpi_ex_release_global_lock (
+        u8                              locked_by_me)
+{
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("ex_release_global_lock");
+
+
+        /* Only attempt unlock if the caller locked it */
+
+        if (locked_by_me) {
+                /* OK, now release the lock */
+
+                status = acpi_ev_release_global_lock ();
+                if (ACPI_FAILURE (status)) {
+                        /* Report the error, but there isn't much else we can do */
+
+                        ACPI_REPORT_ERROR (("Could not release ACPI Global Lock, %s\n",
+                                acpi_format_exception (status)));
+                }
+        }
+
+        return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_digits_needed
+ *
+ * PARAMETERS:  Value           - Value to be represented
+ *              Base            - Base of representation
+ *
+ * RETURN:      the number of digits needed to represent Value in Base
+ *
+ ******************************************************************************/
+
+u32
+acpi_ex_digits_needed (
+        acpi_integer                    value,
+        u32                             base)
+{
+        u32                             num_digits;
+        acpi_integer                    current_value;
+
+
+        ACPI_FUNCTION_TRACE ("ex_digits_needed");
+
+
+        /* acpi_integer is unsigned, so we don't worry about a '-' prefix */
+
+        if (value == 0) {
+                return_VALUE (1);
+        }
+
+        current_value = value;
+        num_digits = 0;
+
+        /* Count the digits in the requested base */
+
+        while (current_value) {
+                (void) acpi_ut_short_divide (current_value, base, &current_value, NULL);
+                num_digits++;
+        }
+
+        return_VALUE (num_digits);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_eisa_id_to_string
+ *
+ * PARAMETERS:  numeric_id      - EISA ID to be converted
+ *              out_string      - Where to put the converted string (8 bytes)
+ *
+ * DESCRIPTION: Convert a numeric EISA ID to string representation
+ *
+ ******************************************************************************/
+
+void
+acpi_ex_eisa_id_to_string (
+        u32                             numeric_id,
+        char                            *out_string)
+{
+        u32                             eisa_id;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        /* Swap ID to big-endian to get contiguous bits */
+
+        eisa_id = acpi_ut_dword_byte_swap (numeric_id);
+
+        out_string[0] = (char) ('@' + (((unsigned long) eisa_id >> 26) & 0x1f));
+        out_string[1] = (char) ('@' + ((eisa_id >> 21) & 0x1f));
+        out_string[2] = (char) ('@' + ((eisa_id >> 16) & 0x1f));
+        out_string[3] = acpi_ut_hex_to_ascii_char ((acpi_integer) eisa_id, 12);
+        out_string[4] = acpi_ut_hex_to_ascii_char ((acpi_integer) eisa_id, 8);
+        out_string[5] = acpi_ut_hex_to_ascii_char ((acpi_integer) eisa_id, 4);
+        out_string[6] = acpi_ut_hex_to_ascii_char ((acpi_integer) eisa_id, 0);
+        out_string[7] = 0;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_unsigned_integer_to_string
+ *
+ * PARAMETERS:  Value           - Value to be converted
+ *              out_string      - Where to put the converted string (8 bytes)
+ *
+ * RETURN:      Convert a number to string representation
+ *
+ ******************************************************************************/
+
+void
+acpi_ex_unsigned_integer_to_string (
+        acpi_integer                    value,
+        char                            *out_string)
+{
+        u32                             count;
+        u32                             digits_needed;
+        u32                             remainder;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        digits_needed = acpi_ex_digits_needed (value, 10);
+        out_string[digits_needed] = 0;
+
+        for (count = digits_needed; count > 0; count--) {
+                (void) acpi_ut_short_divide (value, 10, &value, &remainder);
+                out_string[count-1] = (char) ('0' + remainder);\
+        }
+}
+
+#endif