--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: exoparg1 - AML execution - opcodes with 1 argument
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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 "accommon.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "amlcode.h"
+#include "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_integer_object(acpi_os_get_timer());
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+ break;
+
+ default: /* Unknown opcode */
+
+ ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%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_sleep(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 0x%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 0x%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;
+ u64 power_of_ten;
+ u64 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 +=
+ (((u64) 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 |=
+ (((u64) 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: 0x%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_UINT64_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 0x%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;
+ u64 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_integer_object((u64) 0);
+ 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_UINT64_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_integer_object((u64) type);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+ 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_integer_object(value);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+ 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
+ && ((temp_desc->common.type == ACPI_TYPE_STRING)
+ || (temp_desc->common.type ==
+ ACPI_TYPE_LOCAL_REFERENCE))) {
+ operand[0] = temp_desc;
+ acpi_ut_add_reference(temp_desc);
+ } else {
+ status = AE_AML_OPERAND_TYPE;
+ goto cleanup;
+ }
+ } else {
+ switch ((operand[0])->common.type) {
+ 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 ((operand[0])->common.type == 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!
+ *
+ * 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 =
+ acpi_ut_create_integer_object((u64)
+ temp_desc->buffer.pointer[operand[0]->reference.value]);
+ if (!return_desc) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+ 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) {
+ /*
+ * Element is NULL, do not allow the dereference.
+ * This provides compatibility with other ACPI
+ * implementations.
+ */
+ return_ACPI_STATUS
+ (AE_AML_UNINITIALIZED_ELEMENT);
+ }
+
+ acpi_ut_add_reference(return_desc);
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO,
+ "Unknown Index TargetType 0x%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);
+ if (!return_desc) {
+ break;
+ }
+
+ /*
+ * June 2013:
+ * buffer_fields/field_units require additional resolution
+ */
+ switch (return_desc->common.type) {
+ case ACPI_TYPE_BUFFER_FIELD:
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+ case ACPI_TYPE_LOCAL_BANK_FIELD:
+ case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+ status =
+ acpi_ex_read_data_from_field
+ (walk_state, return_desc,
+ &temp_desc);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+
+ return_desc = temp_desc;
+ break;
+
+ default:
+
+ /* Add another reference to the object */
+
+ acpi_ut_add_reference
+ (return_desc);
+ break;
+ }
+ }
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO,
+ "Unknown class in reference(%p) - 0x%2.2X",
+ operand[0],
+ operand[0]->reference.class));
+
+ status = AE_TYPE;
+ goto cleanup;
+ }
+ }
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%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);
+}
Code Review / kvmfornfv.git / blobdiff