0,0 → 1,1072 |
/****************************************************************************** |
* |
* 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); |
} |