1 files changed, 692 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exconvrt.c b/drivers/acpi/acpica/exconvrt.c
new file mode 100644
index 000000000000..caeead439e8c
--- /dev/null
+++ b/drivers/acpi/acpica/exconvrt.c
@@ -0,0 +1,692 @@
+/******************************************************************************
+ *
+ * Module Name: exconvrt - Object conversion routines
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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/acpi.h>
+#include <acpi/accommon.h>
+#include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exconvrt")
+
+/* Local prototypes */
+static u32
+acpi_ex_convert_to_ascii(acpi_integer integer,
+                         u16 base, u8 * string, u8 max_length);
+
+/*******************************************************************************
+ *
+ * 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);
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
+                          ACPI_FORMAT_UINT64(result)));
+
+        /* 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
+ *
+ ******************************************************************************/
+
+static u32
+acpi_ex_convert_to_ascii(acpi_integer integer,
+                         u16 base, u8 * string, u8 data_width)
+{
+        acpi_integer digit;
+        u32 i;
+        u32 j;
+        u32 k = 0;
+        u32 hex_length;
+        u32 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: 2 ascii hex chars per data byte */
+
+                hex_length = ACPI_MUL_2(data_width);
+                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 suppressed, 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 */
+                        /*
+                         * 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 */
+                        /*
+                         * 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);
+                }
+
+                /*
+                 * Create a new string object and string buffer
+                 * (-1 because of extra separator included in string_length from above)
+                 * Allow creation of zero-length strings from zero-length buffers.
+                 */
+                if (string_length) {
+                        string_length--;
+                }
+
+                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)
+                 */
+                if (obj_desc->buffer.length) {
+                        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_ERROR((AE_INFO,
+                                    "Bad destination type during conversion: %X",
+                                    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_ERROR((AE_INFO,
+                            "Unknown Target type ID 0x%X AmlOpcode %X DestType %s",
+                            GET_CURRENT_ARG_TYPE(walk_state->op_info->
+                                                 runtime_args),
+                            walk_state->opcode,
+                            acpi_ut_get_type_name(destination_type)));
+                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);
+}