diff options
Diffstat (limited to 'drivers/acpi/executer/exoparg1.c')
| -rw-r--r-- | drivers/acpi/executer/exoparg1.c | 1049 |
1 files changed, 0 insertions, 1049 deletions
diff --git a/drivers/acpi/executer/exoparg1.c b/drivers/acpi/executer/exoparg1.c deleted file mode 100644 index f622f9e..0000000 --- a/drivers/acpi/executer/exoparg1.c +++ /dev/null @@ -1,1049 +0,0 @@ - -/****************************************************************************** - * - * 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/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); -} |