ACPICA: create acpica/ directory

also, delete sleep/ and delete ACPI_CFLAGS from Makefile

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 1050 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exoparg1.c b/drivers/acpi/acpica/exoparg1.c
new file mode 100644
index 000000000000..52d78b8622be
--- /dev/null
+++ b/drivers/acpi/acpica/exoparg1.c
@@ -0,0 +1,1050 @@
+
+/******************************************************************************
+ *
+ * Module Name: exoparg1 - AML execution - opcodes with 1 argument
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acparser.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exoparg1")
+
+/*!
+ * Naming convention for AML interpreter execution routines.
+ *
+ * The routines that begin execution of AML opcodes are named with a common
+ * convention based upon the number of arguments, the number of target operands,
+ * and whether or not a value is returned:
+ *
+ *      AcpiExOpcode_xA_yT_zR
+ *
+ * Where:
+ *
+ * xA - ARGUMENTS:    The number of arguments (input operands) that are
+ *                    required for this opcode type (0 through 6 args).
+ * yT - TARGETS:      The number of targets (output operands) that are required
+ *                    for this opcode type (0, 1, or 2 targets).
+ * zR - RETURN VALUE: Indicates whether this opcode type returns a value
+ *                    as the function return (0 or 1).
+ *
+ * The AcpiExOpcode* functions are called via the Dispatcher component with
+ * fully resolved operands.
+!*/
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_opcode_0A_0T_1R
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute operator with no operands, one return value
+ *
+ ******************************************************************************/
+acpi_status acpi_ex_opcode_0A_0T_1R(struct acpi_walk_state *walk_state)
+{
+        acpi_status status = AE_OK;
+        union acpi_operand_object *return_desc = NULL;
+
+        ACPI_FUNCTION_TRACE_STR(ex_opcode_0A_0T_1R,
+                                acpi_ps_get_opcode_name(walk_state->opcode));
+
+        /* Examine the AML opcode */
+
+        switch (walk_state->opcode) {
+        case AML_TIMER_OP:      /*  Timer () */
+
+                /* Create a return object of type Integer */
+
+                return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+                return_desc->integer.value = acpi_os_get_timer();
+                break;
+
+        default:                /*  Unknown opcode  */
+
+                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+                            walk_state->opcode));
+                status = AE_AML_BAD_OPCODE;
+                break;
+        }
+
+      cleanup:
+
+        /* Delete return object on error */
+
+        if ((ACPI_FAILURE(status)) || walk_state->result_obj) {
+                acpi_ut_remove_reference(return_desc);
+                walk_state->result_obj = NULL;
+        } else {
+                /* Save the return value */
+
+                walk_state->result_obj = return_desc;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_opcode_1A_0T_0R
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
+ *              object stack
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_opcode_1A_0T_0R(struct acpi_walk_state *walk_state)
+{
+        union acpi_operand_object **operand = &walk_state->operands[0];
+        acpi_status status = AE_OK;
+
+        ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_0T_0R,
+                                acpi_ps_get_opcode_name(walk_state->opcode));
+
+        /* Examine the AML opcode */
+
+        switch (walk_state->opcode) {
+        case AML_RELEASE_OP:    /*  Release (mutex_object) */
+
+                status = acpi_ex_release_mutex(operand[0], walk_state);
+                break;
+
+        case AML_RESET_OP:      /*  Reset (event_object) */
+
+                status = acpi_ex_system_reset_event(operand[0]);
+                break;
+
+        case AML_SIGNAL_OP:     /*  Signal (event_object) */
+
+                status = acpi_ex_system_signal_event(operand[0]);
+                break;
+
+        case AML_SLEEP_OP:      /*  Sleep (msec_time) */
+
+                status = acpi_ex_system_do_suspend(operand[0]->integer.value);
+                break;
+
+        case AML_STALL_OP:      /*  Stall (usec_time) */
+
+                status =
+                    acpi_ex_system_do_stall((u32) operand[0]->integer.value);
+                break;
+
+        case AML_UNLOAD_OP:     /*  Unload (Handle) */
+
+                status = acpi_ex_unload_table(operand[0]);
+                break;
+
+        default:                /*  Unknown opcode  */
+
+                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+                            walk_state->opcode));
+                status = AE_AML_BAD_OPCODE;
+                break;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_opcode_1A_1T_0R
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute opcode with one argument, one target, and no
+ *              return value.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_opcode_1A_1T_0R(struct acpi_walk_state *walk_state)
+{
+        acpi_status status = AE_OK;
+        union acpi_operand_object **operand = &walk_state->operands[0];
+
+        ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_1T_0R,
+                                acpi_ps_get_opcode_name(walk_state->opcode));
+
+        /* Examine the AML opcode */
+
+        switch (walk_state->opcode) {
+        case AML_LOAD_OP:
+
+                status = acpi_ex_load_op(operand[0], operand[1], walk_state);
+                break;
+
+        default:                /* Unknown opcode */
+
+                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+                            walk_state->opcode));
+                status = AE_AML_BAD_OPCODE;
+                goto cleanup;
+        }
+
+      cleanup:
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_opcode_1A_1T_1R
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute opcode with one argument, one target, and a
+ *              return value.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_opcode_1A_1T_1R(struct acpi_walk_state *walk_state)
+{
+        acpi_status status = AE_OK;
+        union acpi_operand_object **operand = &walk_state->operands[0];
+        union acpi_operand_object *return_desc = NULL;
+        union acpi_operand_object *return_desc2 = NULL;
+        u32 temp32;
+        u32 i;
+        acpi_integer power_of_ten;
+        acpi_integer digit;
+
+        ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_1T_1R,
+                                acpi_ps_get_opcode_name(walk_state->opcode));
+
+        /* Examine the AML opcode */
+
+        switch (walk_state->opcode) {
+        case AML_BIT_NOT_OP:
+        case AML_FIND_SET_LEFT_BIT_OP:
+        case AML_FIND_SET_RIGHT_BIT_OP:
+        case AML_FROM_BCD_OP:
+        case AML_TO_BCD_OP:
+        case AML_COND_REF_OF_OP:
+
+                /* Create a return object of type Integer for these opcodes */
+
+                return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                switch (walk_state->opcode) {
+                case AML_BIT_NOT_OP:    /* Not (Operand, Result)  */
+
+                        return_desc->integer.value = ~operand[0]->integer.value;
+                        break;
+
+                case AML_FIND_SET_LEFT_BIT_OP:  /* find_set_left_bit (Operand, Result) */
+
+                        return_desc->integer.value = operand[0]->integer.value;
+
+                        /*
+                         * Acpi specification describes Integer type as a little
+                         * endian unsigned value, so this boundary condition is valid.
+                         */
+                        for (temp32 = 0; return_desc->integer.value &&
+                             temp32 < ACPI_INTEGER_BIT_SIZE; ++temp32) {
+                                return_desc->integer.value >>= 1;
+                        }
+
+                        return_desc->integer.value = temp32;
+                        break;
+
+                case AML_FIND_SET_RIGHT_BIT_OP: /* find_set_right_bit (Operand, Result) */
+
+                        return_desc->integer.value = operand[0]->integer.value;
+
+                        /*
+                         * The Acpi specification describes Integer type as a little
+                         * endian unsigned value, so this boundary condition is valid.
+                         */
+                        for (temp32 = 0; return_desc->integer.value &&
+                             temp32 < ACPI_INTEGER_BIT_SIZE; ++temp32) {
+                                return_desc->integer.value <<= 1;
+                        }
+
+                        /* Since the bit position is one-based, subtract from 33 (65) */
+
+                        return_desc->integer.value =
+                            temp32 ==
+                            0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - temp32;
+                        break;
+
+                case AML_FROM_BCD_OP:   /* from_bcd (BCDValue, Result) */
+
+                        /*
+                         * The 64-bit ACPI integer can hold 16 4-bit BCD characters
+                         * (if table is 32-bit, integer can hold 8 BCD characters)
+                         * Convert each 4-bit BCD value
+                         */
+                        power_of_ten = 1;
+                        return_desc->integer.value = 0;
+                        digit = operand[0]->integer.value;
+
+                        /* Convert each BCD digit (each is one nybble wide) */
+
+                        for (i = 0;
+                             (i < acpi_gbl_integer_nybble_width) && (digit > 0);
+                             i++) {
+
+                                /* Get the least significant 4-bit BCD digit */
+
+                                temp32 = ((u32) digit) & 0xF;
+
+                                /* Check the range of the digit */
+
+                                if (temp32 > 9) {
+                                        ACPI_ERROR((AE_INFO,
+                                                    "BCD digit too large (not decimal): 0x%X",
+                                                    temp32));
+
+                                        status = AE_AML_NUMERIC_OVERFLOW;
+                                        goto cleanup;
+                                }
+
+                                /* Sum the digit into the result with the current power of 10 */
+
+                                return_desc->integer.value +=
+                                    (((acpi_integer) temp32) * power_of_ten);
+
+                                /* Shift to next BCD digit */
+
+                                digit >>= 4;
+
+                                /* Next power of 10 */
+
+                                power_of_ten *= 10;
+                        }
+                        break;
+
+                case AML_TO_BCD_OP:     /* to_bcd (Operand, Result) */
+
+                        return_desc->integer.value = 0;
+                        digit = operand[0]->integer.value;
+
+                        /* Each BCD digit is one nybble wide */
+
+                        for (i = 0;
+                             (i < acpi_gbl_integer_nybble_width) && (digit > 0);
+                             i++) {
+                                (void)acpi_ut_short_divide(digit, 10, &digit,
+                                                           &temp32);
+
+                                /*
+                                 * Insert the BCD digit that resides in the
+                                 * remainder from above
+                                 */
+                                return_desc->integer.value |=
+                                    (((acpi_integer) temp32) << ACPI_MUL_4(i));
+                        }
+
+                        /* Overflow if there is any data left in Digit */
+
+                        if (digit > 0) {
+                                ACPI_ERROR((AE_INFO,
+                                            "Integer too large to convert to BCD: %8.8X%8.8X",
+                                            ACPI_FORMAT_UINT64(operand[0]->
+                                                               integer.value)));
+                                status = AE_AML_NUMERIC_OVERFLOW;
+                                goto cleanup;
+                        }
+                        break;
+
+                case AML_COND_REF_OF_OP:        /* cond_ref_of (source_object, Result) */
+
+                        /*
+                         * This op is a little strange because the internal return value is
+                         * different than the return value stored in the result descriptor
+                         * (There are really two return values)
+                         */
+                        if ((struct acpi_namespace_node *)operand[0] ==
+                            acpi_gbl_root_node) {
+                                /*
+                                 * This means that the object does not exist in the namespace,
+                                 * return FALSE
+                                 */
+                                return_desc->integer.value = 0;
+                                goto cleanup;
+                        }
+
+                        /* Get the object reference, store it, and remove our reference */
+
+                        status = acpi_ex_get_object_reference(operand[0],
+                                                              &return_desc2,
+                                                              walk_state);
+                        if (ACPI_FAILURE(status)) {
+                                goto cleanup;
+                        }
+
+                        status =
+                            acpi_ex_store(return_desc2, operand[1], walk_state);
+                        acpi_ut_remove_reference(return_desc2);
+
+                        /* The object exists in the namespace, return TRUE */
+
+                        return_desc->integer.value = ACPI_INTEGER_MAX;
+                        goto cleanup;
+
+                default:
+                        /* No other opcodes get here */
+                        break;
+                }
+                break;
+
+        case AML_STORE_OP:      /* Store (Source, Target) */
+
+                /*
+                 * A store operand is typically a number, string, buffer or lvalue
+                 * Be careful about deleting the source object,
+                 * since the object itself may have been stored.
+                 */
+                status = acpi_ex_store(operand[0], operand[1], walk_state);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+
+                /* It is possible that the Store already produced a return object */
+
+                if (!walk_state->result_obj) {
+                        /*
+                         * Normally, we would remove a reference on the Operand[0]
+                         * parameter; But since it is being used as the internal return
+                         * object (meaning we would normally increment it), the two
+                         * cancel out, and we simply don't do anything.
+                         */
+                        walk_state->result_obj = operand[0];
+                        walk_state->operands[0] = NULL; /* Prevent deletion */
+                }
+                return_ACPI_STATUS(status);
+
+                /*
+                 * ACPI 2.0 Opcodes
+                 */
+        case AML_COPY_OP:       /* Copy (Source, Target) */
+
+                status =
+                    acpi_ut_copy_iobject_to_iobject(operand[0], &return_desc,
+                                                    walk_state);
+                break;
+
+        case AML_TO_DECSTRING_OP:       /* to_decimal_string (Data, Result) */
+
+                status = acpi_ex_convert_to_string(operand[0], &return_desc,
+                                                   ACPI_EXPLICIT_CONVERT_DECIMAL);
+                if (return_desc == operand[0]) {
+
+                        /* No conversion performed, add ref to handle return value */
+                        acpi_ut_add_reference(return_desc);
+                }
+                break;
+
+        case AML_TO_HEXSTRING_OP:       /* to_hex_string (Data, Result) */
+
+                status = acpi_ex_convert_to_string(operand[0], &return_desc,
+                                                   ACPI_EXPLICIT_CONVERT_HEX);
+                if (return_desc == operand[0]) {
+
+                        /* No conversion performed, add ref to handle return value */
+                        acpi_ut_add_reference(return_desc);
+                }
+                break;
+
+        case AML_TO_BUFFER_OP:  /* to_buffer (Data, Result) */
+
+                status = acpi_ex_convert_to_buffer(operand[0], &return_desc);
+                if (return_desc == operand[0]) {
+
+                        /* No conversion performed, add ref to handle return value */
+                        acpi_ut_add_reference(return_desc);
+                }
+                break;
+
+        case AML_TO_INTEGER_OP: /* to_integer (Data, Result) */
+
+                status = acpi_ex_convert_to_integer(operand[0], &return_desc,
+                                                    ACPI_ANY_BASE);
+                if (return_desc == operand[0]) {
+
+                        /* No conversion performed, add ref to handle return value */
+                        acpi_ut_add_reference(return_desc);
+                }
+                break;
+
+        case AML_SHIFT_LEFT_BIT_OP:     /* shift_left_bit (Source, bit_num) */
+        case AML_SHIFT_RIGHT_BIT_OP:    /* shift_right_bit (Source, bit_num) */
+
+                /* These are two obsolete opcodes */
+
+                ACPI_ERROR((AE_INFO,
+                            "%s is obsolete and not implemented",
+                            acpi_ps_get_opcode_name(walk_state->opcode)));
+                status = AE_SUPPORT;
+                goto cleanup;
+
+        default:                /* Unknown opcode */
+
+                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+                            walk_state->opcode));
+                status = AE_AML_BAD_OPCODE;
+                goto cleanup;
+        }
+
+        if (ACPI_SUCCESS(status)) {
+
+                /* Store the return value computed above into the target object */
+
+                status = acpi_ex_store(return_desc, operand[1], walk_state);
+        }
+
+      cleanup:
+
+        /* Delete return object on error */
+
+        if (ACPI_FAILURE(status)) {
+                acpi_ut_remove_reference(return_desc);
+        }
+
+        /* Save return object on success */
+
+        else if (!walk_state->result_obj) {
+                walk_state->result_obj = return_desc;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_opcode_1A_0T_1R
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute opcode with one argument, no target, and a return value
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
+{
+        union acpi_operand_object **operand = &walk_state->operands[0];
+        union acpi_operand_object *temp_desc;
+        union acpi_operand_object *return_desc = NULL;
+        acpi_status status = AE_OK;
+        u32 type;
+        acpi_integer value;
+
+        ACPI_FUNCTION_TRACE_STR(ex_opcode_1A_0T_1R,
+                                acpi_ps_get_opcode_name(walk_state->opcode));
+
+        /* Examine the AML opcode */
+
+        switch (walk_state->opcode) {
+        case AML_LNOT_OP:       /* LNot (Operand) */
+
+                return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                /*
+                 * Set result to ONES (TRUE) if Value == 0.  Note:
+                 * return_desc->Integer.Value is initially == 0 (FALSE) from above.
+                 */
+                if (!operand[0]->integer.value) {
+                        return_desc->integer.value = ACPI_INTEGER_MAX;
+                }
+                break;
+
+        case AML_DECREMENT_OP:  /* Decrement (Operand)  */
+        case AML_INCREMENT_OP:  /* Increment (Operand)  */
+
+                /*
+                 * Create a new integer.  Can't just get the base integer and
+                 * increment it because it may be an Arg or Field.
+                 */
+                return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                /*
+                 * Since we are expecting a Reference operand, it can be either a
+                 * NS Node or an internal object.
+                 */
+                temp_desc = operand[0];
+                if (ACPI_GET_DESCRIPTOR_TYPE(temp_desc) ==
+                    ACPI_DESC_TYPE_OPERAND) {
+
+                        /* Internal reference object - prevent deletion */
+
+                        acpi_ut_add_reference(temp_desc);
+                }
+
+                /*
+                 * Convert the Reference operand to an Integer (This removes a
+                 * reference on the Operand[0] object)
+                 *
+                 * NOTE:  We use LNOT_OP here in order to force resolution of the
+                 * reference operand to an actual integer.
+                 */
+                status =
+                    acpi_ex_resolve_operands(AML_LNOT_OP, &temp_desc,
+                                             walk_state);
+                if (ACPI_FAILURE(status)) {
+                        ACPI_EXCEPTION((AE_INFO, status,
+                                        "While resolving operands for [%s]",
+                                        acpi_ps_get_opcode_name(walk_state->
+                                                                opcode)));
+
+                        goto cleanup;
+                }
+
+                /*
+                 * temp_desc is now guaranteed to be an Integer object --
+                 * Perform the actual increment or decrement
+                 */
+                if (walk_state->opcode == AML_INCREMENT_OP) {
+                        return_desc->integer.value =
+                            temp_desc->integer.value + 1;
+                } else {
+                        return_desc->integer.value =
+                            temp_desc->integer.value - 1;
+                }
+
+                /* Finished with this Integer object */
+
+                acpi_ut_remove_reference(temp_desc);
+
+                /*
+                 * Store the result back (indirectly) through the original
+                 * Reference object
+                 */
+                status = acpi_ex_store(return_desc, operand[0], walk_state);
+                break;
+
+        case AML_TYPE_OP:       /* object_type (source_object) */
+
+                /*
+                 * Note: The operand is not resolved at this point because we want to
+                 * get the associated object, not its value.  For example, we don't
+                 * want to resolve a field_unit to its value, we want the actual
+                 * field_unit object.
+                 */
+
+                /* Get the type of the base object */
+
+                status =
+                    acpi_ex_resolve_multiple(walk_state, operand[0], &type,
+                                             NULL);
+                if (ACPI_FAILURE(status)) {
+                        goto cleanup;
+                }
+
+                /* Allocate a descriptor to hold the type. */
+
+                return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                return_desc->integer.value = type;
+                break;
+
+        case AML_SIZE_OF_OP:    /* size_of (source_object) */
+
+                /*
+                 * Note: The operand is not resolved at this point because we want to
+                 * get the associated object, not its value.
+                 */
+
+                /* Get the base object */
+
+                status = acpi_ex_resolve_multiple(walk_state,
+                                                  operand[0], &type,
+                                                  &temp_desc);
+                if (ACPI_FAILURE(status)) {
+                        goto cleanup;
+                }
+
+                /*
+                 * The type of the base object must be integer, buffer, string, or
+                 * package.  All others are not supported.
+                 *
+                 * NOTE: Integer is not specifically supported by the ACPI spec,
+                 * but is supported implicitly via implicit operand conversion.
+                 * rather than bother with conversion, we just use the byte width
+                 * global (4 or 8 bytes).
+                 */
+                switch (type) {
+                case ACPI_TYPE_INTEGER:
+                        value = acpi_gbl_integer_byte_width;
+                        break;
+
+                case ACPI_TYPE_STRING:
+                        value = temp_desc->string.length;
+                        break;
+
+                case ACPI_TYPE_BUFFER:
+
+                        /* Buffer arguments may not be evaluated at this point */
+
+                        status = acpi_ds_get_buffer_arguments(temp_desc);
+                        value = temp_desc->buffer.length;
+                        break;
+
+                case ACPI_TYPE_PACKAGE:
+
+                        /* Package arguments may not be evaluated at this point */
+
+                        status = acpi_ds_get_package_arguments(temp_desc);
+                        value = temp_desc->package.count;
+                        break;
+
+                default:
+                        ACPI_ERROR((AE_INFO,
+                                    "Operand must be Buffer/Integer/String/Package - found type %s",
+                                    acpi_ut_get_type_name(type)));
+                        status = AE_AML_OPERAND_TYPE;
+                        goto cleanup;
+                }
+
+                if (ACPI_FAILURE(status)) {
+                        goto cleanup;
+                }
+
+                /*
+                 * Now that we have the size of the object, create a result
+                 * object to hold the value
+                 */
+                return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                return_desc->integer.value = value;
+                break;
+
+        case AML_REF_OF_OP:     /* ref_of (source_object) */
+
+                status =
+                    acpi_ex_get_object_reference(operand[0], &return_desc,
+                                                 walk_state);
+                if (ACPI_FAILURE(status)) {
+                        goto cleanup;
+                }
+                break;
+
+        case AML_DEREF_OF_OP:   /* deref_of (obj_reference | String) */
+
+                /* Check for a method local or argument, or standalone String */
+
+                if (ACPI_GET_DESCRIPTOR_TYPE(operand[0]) ==
+                    ACPI_DESC_TYPE_NAMED) {
+                        temp_desc =
+                            acpi_ns_get_attached_object((struct
+                                                         acpi_namespace_node *)
+                                                        operand[0]);
+                        if (temp_desc
+                            &&
+                            ((ACPI_GET_OBJECT_TYPE(temp_desc) ==
+                              ACPI_TYPE_STRING)
+                             || (ACPI_GET_OBJECT_TYPE(temp_desc) ==
+                                 ACPI_TYPE_LOCAL_REFERENCE))) {
+                                operand[0] = temp_desc;
+                                acpi_ut_add_reference(temp_desc);
+                        } else {
+                                status = AE_AML_OPERAND_TYPE;
+                                goto cleanup;
+                        }
+                } else {
+                        switch (ACPI_GET_OBJECT_TYPE(operand[0])) {
+                        case ACPI_TYPE_LOCAL_REFERENCE:
+                                /*
+                                 * This is a deref_of (local_x | arg_x)
+                                 *
+                                 * Must resolve/dereference the local/arg reference first
+                                 */
+                                switch (operand[0]->reference.class) {
+                                case ACPI_REFCLASS_LOCAL:
+                                case ACPI_REFCLASS_ARG:
+
+                                        /* Set Operand[0] to the value of the local/arg */
+
+                                        status =
+                                            acpi_ds_method_data_get_value
+                                            (operand[0]->reference.class,
+                                             operand[0]->reference.value,
+                                             walk_state, &temp_desc);
+                                        if (ACPI_FAILURE(status)) {
+                                                goto cleanup;
+                                        }
+
+                                        /*
+                                         * Delete our reference to the input object and
+                                         * point to the object just retrieved
+                                         */
+                                        acpi_ut_remove_reference(operand[0]);
+                                        operand[0] = temp_desc;
+                                        break;
+
+                                case ACPI_REFCLASS_REFOF:
+
+                                        /* Get the object to which the reference refers */
+
+                                        temp_desc =
+                                            operand[0]->reference.object;
+                                        acpi_ut_remove_reference(operand[0]);
+                                        operand[0] = temp_desc;
+                                        break;
+
+                                default:
+
+                                        /* Must be an Index op - handled below */
+                                        break;
+                                }
+                                break;
+
+                        case ACPI_TYPE_STRING:
+                                break;
+
+                        default:
+                                status = AE_AML_OPERAND_TYPE;
+                                goto cleanup;
+                        }
+                }
+
+                if (ACPI_GET_DESCRIPTOR_TYPE(operand[0]) !=
+                    ACPI_DESC_TYPE_NAMED) {
+                        if (ACPI_GET_OBJECT_TYPE(operand[0]) ==
+                            ACPI_TYPE_STRING) {
+                                /*
+                                 * This is a deref_of (String). The string is a reference
+                                 * to a named ACPI object.
+                                 *
+                                 * 1) Find the owning Node
+                                 * 2) Dereference the node to an actual object. Could be a
+                                 *    Field, so we need to resolve the node to a value.
+                                 */
+                                status =
+                                    acpi_ns_get_node(walk_state->scope_info->
+                                                     scope.node,
+                                                     operand[0]->string.pointer,
+                                                     ACPI_NS_SEARCH_PARENT,
+                                                     ACPI_CAST_INDIRECT_PTR
+                                                     (struct
+                                                      acpi_namespace_node,
+                                                      &return_desc));
+                                if (ACPI_FAILURE(status)) {
+                                        goto cleanup;
+                                }
+
+                                status =
+                                    acpi_ex_resolve_node_to_value
+                                    (ACPI_CAST_INDIRECT_PTR
+                                     (struct acpi_namespace_node, &return_desc),
+                                     walk_state);
+                                goto cleanup;
+                        }
+                }
+
+                /* Operand[0] may have changed from the code above */
+
+                if (ACPI_GET_DESCRIPTOR_TYPE(operand[0]) ==
+                    ACPI_DESC_TYPE_NAMED) {
+                        /*
+                         * This is a deref_of (object_reference)
+                         * Get the actual object from the Node (This is the dereference).
+                         * This case may only happen when a local_x or arg_x is
+                         * dereferenced above.
+                         */
+                        return_desc = acpi_ns_get_attached_object((struct
+                                                                   acpi_namespace_node
+                                                                   *)
+                                                                  operand[0]);
+                        acpi_ut_add_reference(return_desc);
+                } else {
+                        /*
+                         * This must be a reference object produced by either the
+                         * Index() or ref_of() operator
+                         */
+                        switch (operand[0]->reference.class) {
+                        case ACPI_REFCLASS_INDEX:
+
+                                /*
+                                 * The target type for the Index operator must be
+                                 * either a Buffer or a Package
+                                 */
+                                switch (operand[0]->reference.target_type) {
+                                case ACPI_TYPE_BUFFER_FIELD:
+
+                                        temp_desc =
+                                            operand[0]->reference.object;
+
+                                        /*
+                                         * Create a new object that contains one element of the
+                                         * buffer -- the element pointed to by the index.
+                                         *
+                                         * NOTE: index into a buffer is NOT a pointer to a
+                                         * sub-buffer of the main buffer, it is only a pointer to a
+                                         * single element (byte) of the buffer!
+                                         */
+                                        return_desc =
+                                            acpi_ut_create_internal_object
+                                            (ACPI_TYPE_INTEGER);
+                                        if (!return_desc) {
+                                                status = AE_NO_MEMORY;
+                                                goto cleanup;
+                                        }
+
+                                        /*
+                                         * Since we are returning the value of the buffer at the
+                                         * indexed location, we don't need to add an additional
+                                         * reference to the buffer itself.
+                                         */
+                                        return_desc->integer.value =
+                                            temp_desc->buffer.
+                                            pointer[operand[0]->reference.
+                                                    value];
+                                        break;
+
+                                case ACPI_TYPE_PACKAGE:
+
+                                        /*
+                                         * Return the referenced element of the package.  We must
+                                         * add another reference to the referenced object, however.
+                                         */
+                                        return_desc =
+                                            *(operand[0]->reference.where);
+                                        if (return_desc) {
+                                                acpi_ut_add_reference
+                                                    (return_desc);
+                                        }
+                                        break;
+
+                                default:
+
+                                        ACPI_ERROR((AE_INFO,
+                                                    "Unknown Index TargetType %X in reference object %p",
+                                                    operand[0]->reference.
+                                                    target_type, operand[0]));
+                                        status = AE_AML_OPERAND_TYPE;
+                                        goto cleanup;
+                                }
+                                break;
+
+                        case ACPI_REFCLASS_REFOF:
+
+                                return_desc = operand[0]->reference.object;
+
+                                if (ACPI_GET_DESCRIPTOR_TYPE(return_desc) ==
+                                    ACPI_DESC_TYPE_NAMED) {
+                                        return_desc =
+                                            acpi_ns_get_attached_object((struct
+                                                                         acpi_namespace_node
+                                                                         *)
+                                                                        return_desc);
+                                }
+
+                                /* Add another reference to the object! */
+
+                                acpi_ut_add_reference(return_desc);
+                                break;
+
+                        default:
+                                ACPI_ERROR((AE_INFO,
+                                            "Unknown class in reference(%p) - %2.2X",
+                                            operand[0],
+                                            operand[0]->reference.class));
+
+                                status = AE_TYPE;
+                                goto cleanup;
+                        }
+                }
+                break;
+
+        default:
+
+                ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+                            walk_state->opcode));
+                status = AE_AML_BAD_OPCODE;
+                goto cleanup;
+        }
+
+      cleanup:
+
+        /* Delete return object on error */
+
+        if (ACPI_FAILURE(status)) {
+                acpi_ut_remove_reference(return_desc);
+        }
+
+        /* Save return object on success */
+
+        else {
+                walk_state->result_obj = return_desc;
+        }
+
+        return_ACPI_STATUS(status);
+}