| |
| /****************************************************************************** |
| * |
| * Module Name: exoparg1 - AML execution - opcodes with 1 argument |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2010, 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 %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_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_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_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) { |
| 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); |
| } |