diff options
Diffstat (limited to 'drivers/acpi/executer/exresop.c')
| -rw-r--r-- | drivers/acpi/executer/exresop.c | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exresop.c b/drivers/acpi/executer/exresop.c new file mode 100644 index 000000000000..c92890220c32 --- /dev/null +++ b/drivers/acpi/executer/exresop.c @@ -0,0 +1,661 @@ + +/****************************************************************************** + * + * Module Name: exresop - AML Interpreter operand/object resolution + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * 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/amlcode.h> +#include <acpi/acparser.h> +#include <acpi/acinterp.h> + + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exresop") + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_check_object_type + * + * PARAMETERS: type_needed Object type needed + * this_type Actual object type + * Object Object pointer + * + * RETURN: Status + * + * DESCRIPTION: Check required type against actual type + * + ******************************************************************************/ + +acpi_status +acpi_ex_check_object_type ( + acpi_object_type type_needed, + acpi_object_type this_type, + void *object) +{ + ACPI_FUNCTION_NAME ("ex_check_object_type"); + + + if (type_needed == ACPI_TYPE_ANY) { + /* All types OK, so we don't perform any typechecks */ + + return (AE_OK); + } + + if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) { + /* + * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference + * objects and thus allow them to be targets. (As per the ACPI + * specification, a store to a constant is a noop.) + */ + if ((this_type == ACPI_TYPE_INTEGER) && + (((union acpi_operand_object *) object)->common.flags & AOPOBJ_AML_CONSTANT)) { + return (AE_OK); + } + } + + if (type_needed != this_type) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [%s], found [%s] %p\n", + acpi_ut_get_type_name (type_needed), + acpi_ut_get_type_name (this_type), object)); + + return (AE_AML_OPERAND_TYPE); + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_resolve_operands + * + * PARAMETERS: Opcode - Opcode being interpreted + * stack_ptr - Pointer to the operand stack to be + * resolved + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Convert multiple input operands to the types required by the + * target operator. + * + * Each 5-bit group in arg_types represents one required + * operand and indicates the required Type. The corresponding operand + * will be converted to the required type if possible, otherwise we + * abort with an exception. + * + ******************************************************************************/ + +acpi_status +acpi_ex_resolve_operands ( + u16 opcode, + union acpi_operand_object **stack_ptr, + struct acpi_walk_state *walk_state) +{ + union acpi_operand_object *obj_desc; + acpi_status status = AE_OK; + u8 object_type; + void *temp_node; + u32 arg_types; + const struct acpi_opcode_info *op_info; + u32 this_arg_type; + acpi_object_type type_needed; + + + ACPI_FUNCTION_TRACE_U32 ("ex_resolve_operands", opcode); + + + op_info = acpi_ps_get_opcode_info (opcode); + if (op_info->class == AML_CLASS_UNKNOWN) { + return_ACPI_STATUS (AE_AML_BAD_OPCODE); + } + + arg_types = op_info->runtime_args; + if (arg_types == ARGI_INVALID_OPCODE) { + ACPI_REPORT_ERROR (("resolve_operands: %X is not a valid AML opcode\n", + opcode)); + + return_ACPI_STATUS (AE_AML_INTERNAL); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Opcode %X [%s] required_operand_types=%8.8X \n", + opcode, op_info->name, arg_types)); + + /* + * Normal exit is with (arg_types == 0) at end of argument list. + * Function will return an exception from within the loop upon + * finding an entry which is not (or cannot be converted + * to) the required type; if stack underflows; or upon + * finding a NULL stack entry (which should not happen). + */ + while (GET_CURRENT_ARG_TYPE (arg_types)) { + if (!stack_ptr || !*stack_ptr) { + ACPI_REPORT_ERROR (("resolve_operands: Null stack entry at %p\n", + stack_ptr)); + + return_ACPI_STATUS (AE_AML_INTERNAL); + } + + /* Extract useful items */ + + obj_desc = *stack_ptr; + + /* Decode the descriptor type */ + + switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) { + case ACPI_DESC_TYPE_NAMED: + + /* Node */ + + object_type = ((struct acpi_namespace_node *) obj_desc)->type; + break; + + + case ACPI_DESC_TYPE_OPERAND: + + /* ACPI internal object */ + + object_type = ACPI_GET_OBJECT_TYPE (obj_desc); + + /* Check for bad acpi_object_type */ + + if (!acpi_ut_valid_object_type (object_type)) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad operand object type [%X]\n", + object_type)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) { + /* + * Decode the Reference + */ + op_info = acpi_ps_get_opcode_info (opcode); + if (op_info->class == AML_CLASS_UNKNOWN) { + return_ACPI_STATUS (AE_AML_BAD_OPCODE); + } + + switch (obj_desc->reference.opcode) { + case AML_DEBUG_OP: + case AML_NAME_OP: + case AML_INDEX_OP: + case AML_REF_OF_OP: + case AML_ARG_OP: + case AML_LOCAL_OP: + case AML_LOAD_OP: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */ + + ACPI_DEBUG_ONLY_MEMBERS (ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Operand is a Reference, ref_opcode [%s]\n", + (acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name))); + break; + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Operand is a Reference, Unknown Reference Opcode %X [%s]\n", + obj_desc->reference.opcode, + (acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + } + break; + + + default: + + /* Invalid descriptor */ + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Invalid descriptor %p [%s]\n", + obj_desc, acpi_ut_get_descriptor_name (obj_desc))); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + + /* + * Get one argument type, point to the next + */ + this_arg_type = GET_CURRENT_ARG_TYPE (arg_types); + INCREMENT_ARG_LIST (arg_types); + + /* + * Handle cases where the object does not need to be + * resolved to a value + */ + switch (this_arg_type) { + case ARGI_REF_OR_STRING: /* Can be a String or Reference */ + + if ((ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_OPERAND) && + (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_STRING)) { + /* + * String found - the string references a named object and must be + * resolved to a node + */ + goto next_operand; + } + + /* Else not a string - fall through to the normal Reference case below */ + /*lint -fallthrough */ + + case ARGI_REFERENCE: /* References: */ + case ARGI_INTEGER_REF: + case ARGI_OBJECT_REF: + case ARGI_DEVICE_REF: + case ARGI_TARGETREF: /* Allows implicit conversion rules before store */ + case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */ + case ARGI_SIMPLE_TARGET: /* Name, Local, or Arg - no implicit conversion */ + + /* Need an operand of type ACPI_TYPE_LOCAL_REFERENCE */ + + if (ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_NAMED) /* Node (name) ptr OK as-is */ { + goto next_operand; + } + + status = acpi_ex_check_object_type (ACPI_TYPE_LOCAL_REFERENCE, + object_type, obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + if (AML_NAME_OP == obj_desc->reference.opcode) { + /* + * Convert an indirect name ptr to direct name ptr and put + * it on the stack + */ + temp_node = obj_desc->reference.object; + acpi_ut_remove_reference (obj_desc); + (*stack_ptr) = temp_node; + } + goto next_operand; + + + case ARGI_DATAREFOBJ: /* Store operator only */ + + /* + * We don't want to resolve index_op reference objects during + * a store because this would be an implicit de_ref_of operation. + * Instead, we just want to store the reference object. + * -- All others must be resolved below. + */ + if ((opcode == AML_STORE_OP) && + (ACPI_GET_OBJECT_TYPE (*stack_ptr) == ACPI_TYPE_LOCAL_REFERENCE) && + ((*stack_ptr)->reference.opcode == AML_INDEX_OP)) { + goto next_operand; + } + break; + + default: + /* All cases covered above */ + break; + } + + + /* + * Resolve this object to a value + */ + status = acpi_ex_resolve_to_value (stack_ptr, walk_state); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Get the resolved object */ + + obj_desc = *stack_ptr; + + /* + * Check the resulting object (value) type + */ + switch (this_arg_type) { + /* + * For the simple cases, only one type of resolved object + * is allowed + */ + case ARGI_MUTEX: + + /* Need an operand of type ACPI_TYPE_MUTEX */ + + type_needed = ACPI_TYPE_MUTEX; + break; + + case ARGI_EVENT: + + /* Need an operand of type ACPI_TYPE_EVENT */ + + type_needed = ACPI_TYPE_EVENT; + break; + + case ARGI_PACKAGE: /* Package */ + + /* Need an operand of type ACPI_TYPE_PACKAGE */ + + type_needed = ACPI_TYPE_PACKAGE; + break; + + case ARGI_ANYTYPE: + + /* Any operand type will do */ + + type_needed = ACPI_TYPE_ANY; + break; + + case ARGI_DDBHANDLE: + + /* Need an operand of type ACPI_TYPE_DDB_HANDLE */ + + type_needed = ACPI_TYPE_LOCAL_REFERENCE; + break; + + + /* + * The more complex cases allow multiple resolved object types + */ + case ARGI_INTEGER: /* Number */ + + /* + * Need an operand of type ACPI_TYPE_INTEGER, + * But we can implicitly convert from a STRING or BUFFER + * Aka - "Implicit Source Operand Conversion" + */ + status = acpi_ex_convert_to_integer (obj_desc, stack_ptr, 16); + if (ACPI_FAILURE (status)) { + if (status == AE_TYPE) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Integer/String/Buffer], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + return_ACPI_STATUS (status); + } + goto next_operand; + + + case ARGI_BUFFER: + + /* + * Need an operand of type ACPI_TYPE_BUFFER, + * But we can implicitly convert from a STRING or INTEGER + * Aka - "Implicit Source Operand Conversion" + */ + status = acpi_ex_convert_to_buffer (obj_desc, stack_ptr); + if (ACPI_FAILURE (status)) { + if (status == AE_TYPE) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Integer/String/Buffer], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + return_ACPI_STATUS (status); + } + goto next_operand; + + + case ARGI_STRING: + + /* + * Need an operand of type ACPI_TYPE_STRING, + * But we can implicitly convert from a BUFFER or INTEGER + * Aka - "Implicit Source Operand Conversion" + */ + status = acpi_ex_convert_to_string (obj_desc, stack_ptr, + ACPI_IMPLICIT_CONVERT_HEX); + if (ACPI_FAILURE (status)) { + if (status == AE_TYPE) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Integer/String/Buffer], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + return_ACPI_STATUS (status); + } + goto next_operand; + + + case ARGI_COMPUTEDATA: + + /* Need an operand of type INTEGER, STRING or BUFFER */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + + /* Valid operand */ + break; + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Integer/String/Buffer], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + goto next_operand; + + + case ARGI_BUFFER_OR_STRING: + + /* Need an operand of type STRING or BUFFER */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + + /* Valid operand */ + break; + + case ACPI_TYPE_INTEGER: + + /* Highest priority conversion is to type Buffer */ + + status = acpi_ex_convert_to_buffer (obj_desc, stack_ptr); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + break; + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Integer/String/Buffer], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + goto next_operand; + + + case ARGI_DATAOBJECT: + /* + * ARGI_DATAOBJECT is only used by the size_of operator. + * Need a buffer, string, package, or ref_of reference. + * + * The only reference allowed here is a direct reference to + * a namespace node. + */ + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_PACKAGE: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + case ACPI_TYPE_LOCAL_REFERENCE: + + /* Valid operand */ + break; + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Buffer/String/Package/Reference], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + goto next_operand; + + + case ARGI_COMPLEXOBJ: + + /* Need a buffer or package or (ACPI 2.0) String */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_PACKAGE: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + + /* Valid operand */ + break; + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Buffer/String/Package], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + goto next_operand; + + + case ARGI_REGION_OR_FIELD: + + /* Need an operand of type ACPI_TYPE_REGION or a FIELD in a region */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_REGION: + case ACPI_TYPE_LOCAL_REGION_FIELD: + case ACPI_TYPE_LOCAL_BANK_FIELD: + case ACPI_TYPE_LOCAL_INDEX_FIELD: + + /* Valid operand */ + break; + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed [Region/region_field], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + goto next_operand; + + + case ARGI_DATAREFOBJ: + + /* Used by the Store() operator only */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_PACKAGE: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + case ACPI_TYPE_BUFFER_FIELD: + case ACPI_TYPE_LOCAL_REFERENCE: + case ACPI_TYPE_LOCAL_REGION_FIELD: + case ACPI_TYPE_LOCAL_BANK_FIELD: + case ACPI_TYPE_LOCAL_INDEX_FIELD: + case ACPI_TYPE_DDB_HANDLE: + + /* Valid operand */ + break; + + default: + + if (acpi_gbl_enable_interpreter_slack) { + /* + * Enable original behavior of Store(), allowing any and all + * objects as the source operand. The ACPI spec does not + * allow this, however. + */ + break; + } + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n", + acpi_ut_get_object_type_name (obj_desc), obj_desc)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + goto next_operand; + + + default: + + /* Unknown type */ + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Internal - Unknown ARGI (required operand) type %X\n", + this_arg_type)); + + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * Make sure that the original object was resolved to the + * required object type (Simple cases only). + */ + status = acpi_ex_check_object_type (type_needed, + ACPI_GET_OBJECT_TYPE (*stack_ptr), *stack_ptr); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + +next_operand: + /* + * If more operands needed, decrement stack_ptr to point + * to next operand on stack + */ + if (GET_CURRENT_ARG_TYPE (arg_types)) { + stack_ptr--; + } + + } /* while (*Types) */ + + return_ACPI_STATUS (status); +} + + |