1 files changed, 708 insertions, 0 deletions

diff --git a/drivers/acpi/executer/exconvrt.c b/drivers/acpi/executer/exconvrt.c
new file mode 100644
index 000000000000..df7ba1219bf6
--- /dev/null
+++ b/drivers/acpi/executer/exconvrt.c
@@ -0,0 +1,708 @@
+/******************************************************************************
+ *
+ * Module Name: exconvrt - Object conversion routines
+ *
+ *****************************************************************************/
+
+/*
+ * 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.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
+
+
+#define _COMPONENT          ACPI_EXECUTER
+         ACPI_MODULE_NAME    ("exconvrt")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_convert_to_integer
+ *
+ * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
+ *                                Integer, Buffer, or String
+ *              result_desc     - Where the new Integer object is returned
+ *              Flags           - Used for string conversion
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an ACPI Object to an integer.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_convert_to_integer (
+        union acpi_operand_object       *obj_desc,
+        union acpi_operand_object       **result_desc,
+        u32                             flags)
+{
+        union acpi_operand_object       *return_desc;
+        u8                              *pointer;
+        acpi_integer                    result;
+        u32                             i;
+        u32                             count;
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_integer", obj_desc);
+
+
+        switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
+        case ACPI_TYPE_INTEGER:
+
+                /* No conversion necessary */
+
+                *result_desc = obj_desc;
+                return_ACPI_STATUS (AE_OK);
+
+        case ACPI_TYPE_BUFFER:
+        case ACPI_TYPE_STRING:
+
+                /* Note: Takes advantage of common buffer/string fields */
+
+                pointer = obj_desc->buffer.pointer;
+                count   = obj_desc->buffer.length;
+                break;
+
+        default:
+                return_ACPI_STATUS (AE_TYPE);
+        }
+
+        /*
+         * Convert the buffer/string to an integer.  Note that both buffers and
+         * strings are treated as raw data - we don't convert ascii to hex for
+         * strings.
+         *
+         * There are two terminating conditions for the loop:
+         * 1) The size of an integer has been reached, or
+         * 2) The end of the buffer or string has been reached
+         */
+        result = 0;
+
+        /*
+         * String conversion is different than Buffer conversion
+         */
+        switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
+        case ACPI_TYPE_STRING:
+
+                /*
+                 * Convert string to an integer - for most cases, the string must be
+                 * hexadecimal as per the ACPI specification.  The only exception (as
+                 * of ACPI 3.0) is that the to_integer() operator allows both decimal
+                 * and hexadecimal strings (hex prefixed with "0x").
+                 */
+                status = acpi_ut_strtoul64 ((char *) pointer, flags, &result);
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+                break;
+
+
+        case ACPI_TYPE_BUFFER:
+
+                /* Check for zero-length buffer */
+
+                if (!count) {
+                        return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
+                }
+
+                /* Transfer no more than an integer's worth of data */
+
+                if (count > acpi_gbl_integer_byte_width) {
+                        count = acpi_gbl_integer_byte_width;
+                }
+
+                /*
+                 * Convert buffer to an integer - we simply grab enough raw data
+                 * from the buffer to fill an integer
+                 */
+                for (i = 0; i < count; i++) {
+                        /*
+                         * Get next byte and shift it into the Result.
+                         * Little endian is used, meaning that the first byte of the buffer
+                         * is the LSB of the integer
+                         */
+                        result |= (((acpi_integer) pointer[i]) << (i * 8));
+                }
+                break;
+
+
+        default:
+                /* No other types can get here */
+                break;
+        }
+
+        /*
+         * Create a new integer
+         */
+        return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+        if (!return_desc) {
+                return_ACPI_STATUS (AE_NO_MEMORY);
+        }
+
+        /* Save the Result */
+
+        return_desc->integer.value = result;
+        acpi_ex_truncate_for32bit_table (return_desc);
+        *result_desc = return_desc;
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_convert_to_buffer
+ *
+ * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
+ *                                Integer, Buffer, or String
+ *              result_desc     - Where the new buffer object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an ACPI Object to a Buffer
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_convert_to_buffer (
+        union acpi_operand_object       *obj_desc,
+        union acpi_operand_object       **result_desc)
+{
+        union acpi_operand_object       *return_desc;
+        u8                              *new_buf;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_buffer", obj_desc);
+
+
+        switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
+        case ACPI_TYPE_BUFFER:
+
+                /* No conversion necessary */
+
+                *result_desc = obj_desc;
+                return_ACPI_STATUS (AE_OK);
+
+
+        case ACPI_TYPE_INTEGER:
+
+                /*
+                 * Create a new Buffer object.
+                 * Need enough space for one integer
+                 */
+                return_desc = acpi_ut_create_buffer_object (acpi_gbl_integer_byte_width);
+                if (!return_desc) {
+                        return_ACPI_STATUS (AE_NO_MEMORY);
+                }
+
+                /* Copy the integer to the buffer, LSB first */
+
+                new_buf = return_desc->buffer.pointer;
+                ACPI_MEMCPY (new_buf,
+                                  &obj_desc->integer.value,
+                                  acpi_gbl_integer_byte_width);
+                break;
+
+
+        case ACPI_TYPE_STRING:
+
+                /*
+                 * Create a new Buffer object
+                 * Size will be the string length
+                 *
+                 * NOTE: Add one to the string length to include the null terminator.
+                 * The ACPI spec is unclear on this subject, but there is existing
+                 * ASL/AML code that depends on the null being transferred to the new
+                 * buffer.
+                 */
+                return_desc = acpi_ut_create_buffer_object ((acpi_size) obj_desc->string.length + 1);
+                if (!return_desc) {
+                        return_ACPI_STATUS (AE_NO_MEMORY);
+                }
+
+                /* Copy the string to the buffer */
+
+                new_buf = return_desc->buffer.pointer;
+                ACPI_STRNCPY ((char *) new_buf, (char *) obj_desc->string.pointer,
+                        obj_desc->string.length);
+                break;
+
+
+        default:
+                return_ACPI_STATUS (AE_TYPE);
+        }
+
+        /* Mark buffer initialized */
+
+        return_desc->common.flags |= AOPOBJ_DATA_VALID;
+        *result_desc = return_desc;
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_convert_to_ascii
+ *
+ * PARAMETERS:  Integer         - Value to be converted
+ *              Base            - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
+ *              String          - Where the string is returned
+ *              data_width      - Size of data item to be converted, in bytes
+ *
+ * RETURN:      Actual string length
+ *
+ * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
+ *
+ ******************************************************************************/
+
+u32
+acpi_ex_convert_to_ascii (
+        acpi_integer                    integer,
+        u16                             base,
+        u8                              *string,
+        u8                              data_width)
+{
+        acpi_integer                    digit;
+        acpi_native_uint                i;
+        acpi_native_uint                j;
+        acpi_native_uint                k = 0;
+        acpi_native_uint                hex_length;
+        acpi_native_uint                decimal_length;
+        u32                             remainder;
+        u8                              supress_zeros;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        switch (base) {
+        case 10:
+
+                /* Setup max length for the decimal number */
+
+                switch (data_width) {
+                case 1:
+                        decimal_length = ACPI_MAX8_DECIMAL_DIGITS;
+                        break;
+
+                case 4:
+                        decimal_length = ACPI_MAX32_DECIMAL_DIGITS;
+                        break;
+
+                case 8:
+                default:
+                        decimal_length = ACPI_MAX64_DECIMAL_DIGITS;
+                        break;
+                }
+
+                supress_zeros = TRUE;    /* No leading zeros */
+                remainder = 0;
+
+                for (i = decimal_length; i > 0; i--) {
+                        /* Divide by nth factor of 10 */
+
+                        digit = integer;
+                        for (j = 0; j < i; j++) {
+                                (void) acpi_ut_short_divide (digit, 10, &digit, &remainder);
+                        }
+
+                        /* Handle leading zeros */
+
+                        if (remainder != 0) {
+                                supress_zeros = FALSE;
+                        }
+
+                        if (!supress_zeros) {
+                                string[k] = (u8) (ACPI_ASCII_ZERO + remainder);
+                                k++;
+                        }
+                }
+                break;
+
+        case 16:
+
+                hex_length = ACPI_MUL_2 (data_width); /* 2 ascii hex chars per data byte */
+
+                for (i = 0, j = (hex_length-1); i < hex_length; i++, j--) {
+                        /* Get one hex digit, most significant digits first */
+
+                        string[k] = (u8) acpi_ut_hex_to_ascii_char (integer, ACPI_MUL_4 (j));
+                        k++;
+                }
+                break;
+
+        default:
+                return (0);
+        }
+
+        /*
+         * Since leading zeros are supressed, we must check for the case where
+         * the integer equals 0
+         *
+         * Finally, null terminate the string and return the length
+         */
+        if (!k) {
+                string [0] = ACPI_ASCII_ZERO;
+                k = 1;
+        }
+
+        string [k] = 0;
+        return ((u32) k);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_convert_to_string
+ *
+ * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
+ *                                Integer, Buffer, or String
+ *              result_desc     - Where the string object is returned
+ *              Type            - String flags (base and conversion type)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an ACPI Object to a string
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_convert_to_string (
+        union acpi_operand_object       *obj_desc,
+        union acpi_operand_object       **result_desc,
+        u32                             type)
+{
+        union acpi_operand_object       *return_desc;
+        u8                              *new_buf;
+        u32                             i;
+        u32                             string_length = 0;
+        u16                             base = 16;
+        u8                              separator = ',';
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_string", obj_desc);
+
+
+        switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
+        case ACPI_TYPE_STRING:
+
+                /* No conversion necessary */
+
+                *result_desc = obj_desc;
+                return_ACPI_STATUS (AE_OK);
+
+
+        case ACPI_TYPE_INTEGER:
+
+                switch (type) {
+                case ACPI_EXPLICIT_CONVERT_DECIMAL:
+
+                        /* Make room for maximum decimal number */
+
+                        string_length = ACPI_MAX_DECIMAL_DIGITS;
+                        base = 10;
+                        break;
+
+                default:
+
+                        /* Two hex string characters for each integer byte */
+
+                        string_length = ACPI_MUL_2 (acpi_gbl_integer_byte_width);
+                        break;
+                }
+
+                /*
+                 * Create a new String
+                 * Need enough space for one ASCII integer (plus null terminator)
+                 */
+                return_desc = acpi_ut_create_string_object ((acpi_size) string_length);
+                if (!return_desc) {
+                        return_ACPI_STATUS (AE_NO_MEMORY);
+                }
+
+                new_buf = return_desc->buffer.pointer;
+
+                /* Convert integer to string */
+
+                string_length = acpi_ex_convert_to_ascii (obj_desc->integer.value, base,
+                                   new_buf, acpi_gbl_integer_byte_width);
+
+                /* Null terminate at the correct place */
+
+                return_desc->string.length = string_length;
+                new_buf [string_length] = 0;
+                break;
+
+
+        case ACPI_TYPE_BUFFER:
+
+                /* Setup string length, base, and separator */
+
+                switch (type) {
+                case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by to_decimal_string operator */
+                        /*
+                         * From ACPI: "If Data is a buffer, it is converted to a string of
+                         * decimal values separated by commas."
+                         */
+                        base = 10;
+
+                        /*
+                         * Calculate the final string length.  Individual string values
+                         * are variable length (include separator for each)
+                         */
+                        for (i = 0; i < obj_desc->buffer.length; i++) {
+                                if (obj_desc->buffer.pointer[i] >= 100) {
+                                        string_length += 4;
+                                }
+                                else if (obj_desc->buffer.pointer[i] >= 10) {
+                                        string_length += 3;
+                                }
+                                else {
+                                        string_length += 2;
+                                }
+                        }
+                        break;
+
+                case ACPI_IMPLICIT_CONVERT_HEX:
+                        /*
+                         * From the ACPI spec:
+                         *"The entire contents of the buffer are converted to a string of
+                         * two-character hexadecimal numbers, each separated by a space."
+                         */
+                        separator = ' ';
+                        string_length = (obj_desc->buffer.length * 3);
+                        break;
+
+                case ACPI_EXPLICIT_CONVERT_HEX:     /* Used by to_hex_string operator */
+                        /*
+                         * From ACPI: "If Data is a buffer, it is converted to a string of
+                         * hexadecimal values separated by commas."
+                         */
+                        string_length = (obj_desc->buffer.length * 3);
+                        break;
+
+                default:
+                        return_ACPI_STATUS (AE_BAD_PARAMETER);
+                }
+
+                /*
+                 * Perform the conversion.
+                 * (-1 because of extra separator included in string_length from above)
+                 */
+                string_length--;
+                if (string_length > ACPI_MAX_STRING_CONVERSION) /* ACPI limit */ {
+                        return_ACPI_STATUS (AE_AML_STRING_LIMIT);
+                }
+
+                /*
+                 * Create a new string object and string buffer
+                 */
+                return_desc = acpi_ut_create_string_object ((acpi_size) string_length);
+                if (!return_desc) {
+                        return_ACPI_STATUS (AE_NO_MEMORY);
+                }
+
+                new_buf = return_desc->buffer.pointer;
+
+                /*
+                 * Convert buffer bytes to hex or decimal values
+                 * (separated by commas or spaces)
+                 */
+                for (i = 0; i < obj_desc->buffer.length; i++) {
+                        new_buf += acpi_ex_convert_to_ascii (
+                                         (acpi_integer) obj_desc->buffer.pointer[i], base,
+                                         new_buf, 1);
+                        *new_buf++ = separator; /* each separated by a comma or space */
+                }
+
+                /* Null terminate the string (overwrites final comma/space from above) */
+
+                new_buf--;
+                *new_buf = 0;
+                break;
+
+        default:
+                return_ACPI_STATUS (AE_TYPE);
+        }
+
+        *result_desc = return_desc;
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_convert_to_target_type
+ *
+ * PARAMETERS:  destination_type    - Current type of the destination
+ *              source_desc         - Source object to be converted.
+ *              result_desc         - Where the converted object is returned
+ *              walk_state          - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Implements "implicit conversion" rules for storing an object.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_convert_to_target_type (
+        acpi_object_type                destination_type,
+        union acpi_operand_object       *source_desc,
+        union acpi_operand_object       **result_desc,
+        struct acpi_walk_state          *walk_state)
+{
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE ("ex_convert_to_target_type");
+
+
+        /* Default behavior */
+
+        *result_desc = source_desc;
+
+        /*
+         * If required by the target,
+         * perform implicit conversion on the source before we store it.
+         */
+        switch (GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args)) {
+        case ARGI_SIMPLE_TARGET:
+        case ARGI_FIXED_TARGET:
+        case ARGI_INTEGER_REF:      /* Handles Increment, Decrement cases */
+
+                switch (destination_type) {
+                case ACPI_TYPE_LOCAL_REGION_FIELD:
+                        /*
+                         * Named field can always handle conversions
+                         */
+                        break;
+
+                default:
+                        /* No conversion allowed for these types */
+
+                        if (destination_type != ACPI_GET_OBJECT_TYPE (source_desc)) {
+                                ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                                        "Explicit operator, will store (%s) over existing type (%s)\n",
+                                        acpi_ut_get_object_type_name (source_desc),
+                                        acpi_ut_get_type_name (destination_type)));
+                                status = AE_TYPE;
+                        }
+                }
+                break;
+
+
+        case ARGI_TARGETREF:
+
+                switch (destination_type) {
+                case ACPI_TYPE_INTEGER:
+                case ACPI_TYPE_BUFFER_FIELD:
+                case ACPI_TYPE_LOCAL_BANK_FIELD:
+                case ACPI_TYPE_LOCAL_INDEX_FIELD:
+                        /*
+                         * These types require an Integer operand.  We can convert
+                         * a Buffer or a String to an Integer if necessary.
+                         */
+                        status = acpi_ex_convert_to_integer (source_desc, result_desc,
+                                         16);
+                        break;
+
+
+                case ACPI_TYPE_STRING:
+
+                        /*
+                         * The operand must be a String.  We can convert an
+                         * Integer or Buffer if necessary
+                         */
+                        status = acpi_ex_convert_to_string (source_desc, result_desc,
+                                         ACPI_IMPLICIT_CONVERT_HEX);
+                        break;
+
+
+                case ACPI_TYPE_BUFFER:
+
+                        /*
+                         * The operand must be a Buffer.  We can convert an
+                         * Integer or String if necessary
+                         */
+                        status = acpi_ex_convert_to_buffer (source_desc, result_desc);
+                        break;
+
+
+                default:
+                        ACPI_REPORT_ERROR (("Bad destination type during conversion: %X\n",
+                                destination_type));
+                        status = AE_AML_INTERNAL;
+                        break;
+                }
+                break;
+
+
+        case ARGI_REFERENCE:
+                /*
+                 * create_xxxx_field cases - we are storing the field object into the name
+                 */
+                break;
+
+
+        default:
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+                        "Unknown Target type ID 0x%X Op %s dest_type %s\n",
+                        GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args),
+                        walk_state->op_info->name, acpi_ut_get_type_name (destination_type)));
+
+                ACPI_REPORT_ERROR (("Bad Target Type (ARGI): %X\n",
+                        GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args)))
+                status = AE_AML_INTERNAL;
+        }
+
+        /*
+         * Source-to-Target conversion semantics:
+         *
+         * If conversion to the target type cannot be performed, then simply
+         * overwrite the target with the new object and type.
+         */
+        if (status == AE_TYPE) {
+                status = AE_OK;
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+