patch-2.4.6 linux/drivers/acpi/executer/exresop.c
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- Lines: 481
- Date:
Wed Jun 20 17:47:40 2001
- Orig file:
v2.4.5/linux/drivers/acpi/executer/exresop.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/executer/exresop.c linux/drivers/acpi/executer/exresop.c
@@ -0,0 +1,480 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresop - AML Interpreter operand/object resolution
+ * $Revision: 29 $
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000, 2001 R. Byron Moore
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include "acpi.h"
+#include "amlcode.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+#include "actables.h"
+#include "acevents.h"
+
+
+#define _COMPONENT ACPI_EXECUTER
+ 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)
+{
+
+
+ if (type_needed == ACPI_TYPE_ANY) {
+ /* All types OK, so we don't perform any typechecks */
+
+ return (AE_OK);
+ }
+
+ if (type_needed != this_type) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: Acpi_ex_resolve_operands
+ *
+ * PARAMETERS: Opcode Opcode being interpreted
+ * Stack_ptr Top of operand stack
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Convert stack entries to required types
+ *
+ * Each nibble in Arg_types represents one required operand
+ * and indicates the required Type:
+ *
+ * The corresponding stack entry will be converted to the
+ * required type if possible, else return an exception
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ex_resolve_operands (
+ u16 opcode,
+ ACPI_OPERAND_OBJECT **stack_ptr,
+ ACPI_WALK_STATE *walk_state)
+{
+ ACPI_OPERAND_OBJECT *obj_desc;
+ ACPI_STATUS status = AE_OK;
+ u8 object_type;
+ void *temp_node;
+ u32 arg_types;
+ ACPI_OPCODE_INFO *op_info;
+ u32 this_arg_type;
+ ACPI_OBJECT_TYPE type_needed;
+
+
+ op_info = acpi_ps_get_opcode_info (opcode);
+ if (ACPI_GET_OP_TYPE (op_info) != ACPI_OP_TYPE_OPCODE) {
+ return (AE_AML_BAD_OPCODE);
+ }
+
+
+ arg_types = op_info->runtime_args;
+ if (arg_types == ARGI_INVALID_OPCODE) {
+ return (AE_AML_INTERNAL);
+ }
+
+
+ /*
+ * 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) {
+ return (AE_AML_INTERNAL);
+ }
+
+ /* Extract useful items */
+
+ obj_desc = *stack_ptr;
+
+ /* Decode the descriptor type */
+
+ if (VALID_DESCRIPTOR_TYPE (obj_desc, ACPI_DESC_TYPE_NAMED)) {
+ /* Node */
+
+ object_type = ((ACPI_NAMESPACE_NODE *) obj_desc)->type;
+ }
+
+ else if (VALID_DESCRIPTOR_TYPE (obj_desc, ACPI_DESC_TYPE_INTERNAL)) {
+ /* ACPI internal object */
+
+ object_type = obj_desc->common.type;
+
+ /* Check for bad ACPI_OBJECT_TYPE */
+
+ if (!acpi_ex_validate_object_type (object_type)) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ if (object_type == (u8) INTERNAL_TYPE_REFERENCE) {
+ /*
+ * Decode the Reference
+ */
+
+ op_info = acpi_ps_get_opcode_info (opcode);
+ if (ACPI_GET_OP_TYPE (op_info) != ACPI_OP_TYPE_OPCODE) {
+ return (AE_AML_BAD_OPCODE);
+ }
+
+
+ switch (obj_desc->reference.opcode) {
+ case AML_ZERO_OP:
+ case AML_ONE_OP:
+ case AML_ONES_OP:
+ case AML_DEBUG_OP:
+ case AML_NAME_OP:
+ case AML_INDEX_OP:
+ case AML_ARG_OP:
+ case AML_LOCAL_OP:
+
+ break;
+
+ default:
+ return (AE_AML_OPERAND_TYPE);
+ break;
+ }
+ }
+ }
+
+ else {
+ /* Invalid descriptor */
+
+ return (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_REFERENCE: /* References */
+ case ARGI_INTEGER_REF:
+ case ARGI_OBJECT_REF:
+ case ARGI_DEVICE_REF:
+ case ARGI_TARGETREF: /* TBD: must implement 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 INTERNAL_TYPE_REFERENCE */
+
+ if (VALID_DESCRIPTOR_TYPE (obj_desc, ACPI_DESC_TYPE_NAMED)) /* direct name ptr OK as-is */ {
+ goto next_operand;
+ }
+
+ status = acpi_ex_check_object_type (INTERNAL_TYPE_REFERENCE,
+ object_type, obj_desc);
+ if (ACPI_FAILURE (status)) {
+ return (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;
+ break;
+
+
+ case ARGI_ANYTYPE:
+
+ /*
+ * 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) &&
+ ((*stack_ptr)->common.type == INTERNAL_TYPE_REFERENCE) &&
+ ((*stack_ptr)->reference.opcode == AML_INDEX_OP)) {
+ goto next_operand;
+ }
+ break;
+ }
+
+
+ /*
+ * Resolve this object to a value
+ */
+
+ status = acpi_ex_resolve_to_value (stack_ptr, walk_state);
+ if (ACPI_FAILURE (status)) {
+ return (status);
+ }
+
+
+ /*
+ * 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_REGION:
+
+ /* Need an operand of type ACPI_TYPE_REGION */
+
+ type_needed = ACPI_TYPE_REGION;
+ break;
+
+ case ARGI_IF: /* If */
+
+ /* Need an operand of type INTERNAL_TYPE_IF */
+
+ type_needed = INTERNAL_TYPE_IF;
+ 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;
+
+
+ /*
+ * 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
+ */
+ status = acpi_ex_convert_to_integer (stack_ptr, walk_state);
+ if (ACPI_FAILURE (status)) {
+ if (status == AE_TYPE) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ return (status);
+ }
+
+ goto next_operand;
+ break;
+
+
+ case ARGI_BUFFER:
+
+ /*
+ * Need an operand of type ACPI_TYPE_BUFFER,
+ * But we can implicitly convert from a STRING or INTEGER
+ */
+ status = acpi_ex_convert_to_buffer (stack_ptr, walk_state);
+ if (ACPI_FAILURE (status)) {
+ if (status == AE_TYPE) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ return (status);
+ }
+
+ goto next_operand;
+ break;
+
+
+ case ARGI_STRING:
+
+ /*
+ * Need an operand of type ACPI_TYPE_STRING,
+ * But we can implicitly convert from a BUFFER or INTEGER
+ */
+ status = acpi_ex_convert_to_string (stack_ptr, walk_state);
+ if (ACPI_FAILURE (status)) {
+ if (status == AE_TYPE) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ return (status);
+ }
+
+ goto next_operand;
+ break;
+
+
+ case ARGI_COMPUTEDATA:
+
+ /* Need an operand of type INTEGER, STRING or BUFFER */
+
+ if ((ACPI_TYPE_INTEGER != (*stack_ptr)->common.type) &&
+ (ACPI_TYPE_STRING != (*stack_ptr)->common.type) &&
+ (ACPI_TYPE_BUFFER != (*stack_ptr)->common.type)) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+ goto next_operand;
+ break;
+
+
+ case ARGI_DATAOBJECT:
+ /*
+ * ARGI_DATAOBJECT is only used by the Size_of operator.
+ *
+ * The ACPI specification allows Size_of to return the size of
+ * a Buffer, String or Package. However, the MS ACPI.SYS AML
+ * Interpreter also allows an Node reference to return without
+ * error with a size of 4.
+ */
+
+ /* Need a buffer, string, package or Node reference */
+
+ if (((*stack_ptr)->common.type != ACPI_TYPE_BUFFER) &&
+ ((*stack_ptr)->common.type != ACPI_TYPE_STRING) &&
+ ((*stack_ptr)->common.type != ACPI_TYPE_PACKAGE) &&
+ ((*stack_ptr)->common.type != INTERNAL_TYPE_REFERENCE)) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+
+ /*
+ * If this is a reference, only allow a reference to an Node.
+ */
+ if ((*stack_ptr)->common.type == INTERNAL_TYPE_REFERENCE) {
+ if (!(*stack_ptr)->reference.node) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+ }
+ goto next_operand;
+ break;
+
+
+ case ARGI_COMPLEXOBJ:
+
+ /* Need a buffer or package or (ACPI 2.0) String */
+
+ if (((*stack_ptr)->common.type != ACPI_TYPE_BUFFER) &&
+ ((*stack_ptr)->common.type != ACPI_TYPE_STRING) &&
+ ((*stack_ptr)->common.type != ACPI_TYPE_PACKAGE)) {
+ return (AE_AML_OPERAND_TYPE);
+ }
+ goto next_operand;
+ break;
+
+
+ default:
+
+ /* Unknown type */
+
+ return (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,
+ (*stack_ptr)->common.type, *stack_ptr);
+ if (ACPI_FAILURE (status)) {
+ return (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 (status);
+}
+
+
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