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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [acpi/] [dispatcher/] [dsopcode.c] - Blame information for rev 62

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/******************************************************************************
 *
 * Module Name: dsopcode - Dispatcher Op Region support and handling of
 *                         "control" opcodes
 *
 *****************************************************************************/
 
/*
 * Copyright (C) 2000 - 2007, 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/acparser.h>
#include <acpi/amlcode.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>
 
#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dsopcode")
 
/* Local prototypes */
static acpi_status
acpi_ds_execute_arguments(struct acpi_namespace_node *node,
                          struct acpi_namespace_node *scope_node,
                          u32 aml_length, u8 * aml_start);
 
static acpi_status
acpi_ds_init_buffer_field(u16 aml_opcode,
                          union acpi_operand_object *obj_desc,
                          union acpi_operand_object *buffer_desc,
                          union acpi_operand_object *offset_desc,
                          union acpi_operand_object *length_desc,
                          union acpi_operand_object *result_desc);
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_execute_arguments
 *
 * PARAMETERS:  Node                - Object NS node
 *              scope_node          - Parent NS node
 *              aml_length          - Length of executable AML
 *              aml_start           - Pointer to the AML
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Late (deferred) execution of region or field arguments
 *
 ******************************************************************************/
 
static acpi_status
acpi_ds_execute_arguments(struct acpi_namespace_node *node,
                          struct acpi_namespace_node *scope_node,
                          u32 aml_length, u8 * aml_start)
{
        acpi_status status;
        union acpi_parse_object *op;
        struct acpi_walk_state *walk_state;
 
        ACPI_FUNCTION_TRACE(ds_execute_arguments);
 
        /*
         * Allocate a new parser op to be the root of the parsed tree
         */
        op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
        if (!op) {
                return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        /* Save the Node for use in acpi_ps_parse_aml */
 
        op->common.node = scope_node;
 
        /* Create and initialize a new parser state */
 
        walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
        if (!walk_state) {
                status = AE_NO_MEMORY;
                goto cleanup;
        }
 
        status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
                                       aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
        if (ACPI_FAILURE(status)) {
                acpi_ds_delete_walk_state(walk_state);
                goto cleanup;
        }
 
        /* Mark this parse as a deferred opcode */
 
        walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
        walk_state->deferred_node = node;
 
        /* Pass1: Parse the entire declaration */
 
        status = acpi_ps_parse_aml(walk_state);
        if (ACPI_FAILURE(status)) {
                goto cleanup;
        }
 
        /* Get and init the Op created above */
 
        op->common.node = node;
        acpi_ps_delete_parse_tree(op);
 
        /* Evaluate the deferred arguments */
 
        op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
        if (!op) {
                return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        op->common.node = scope_node;
 
        /* Create and initialize a new parser state */
 
        walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
        if (!walk_state) {
                status = AE_NO_MEMORY;
                goto cleanup;
        }
 
        /* Execute the opcode and arguments */
 
        status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
                                       aml_length, NULL, ACPI_IMODE_EXECUTE);
        if (ACPI_FAILURE(status)) {
                acpi_ds_delete_walk_state(walk_state);
                goto cleanup;
        }
 
        /* Mark this execution as a deferred opcode */
 
        walk_state->deferred_node = node;
        status = acpi_ps_parse_aml(walk_state);
 
      cleanup:
        acpi_ps_delete_parse_tree(op);
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_buffer_field_arguments
 *
 * PARAMETERS:  obj_desc        - A valid buffer_field object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
 *              evaluation of these field attributes.
 *
 ******************************************************************************/
 
acpi_status
acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
{
        union acpi_operand_object *extra_desc;
        struct acpi_namespace_node *node;
        acpi_status status;
 
        ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);
 
        if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
                return_ACPI_STATUS(AE_OK);
        }
 
        /* Get the AML pointer (method object) and buffer_field node */
 
        extra_desc = acpi_ns_get_secondary_object(obj_desc);
        node = obj_desc->buffer_field.node;
 
        ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
                        (ACPI_TYPE_BUFFER_FIELD, node, NULL));
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
                          acpi_ut_get_node_name(node)));
 
        /* Execute the AML code for the term_arg arguments */
 
        status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
                                           extra_desc->extra.aml_length,
                                           extra_desc->extra.aml_start);
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_buffer_arguments
 *
 * PARAMETERS:  obj_desc        - A valid Buffer object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get Buffer length and initializer byte list.  This implements
 *              the late evaluation of these attributes.
 *
 ******************************************************************************/
 
acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
{
        struct acpi_namespace_node *node;
        acpi_status status;
 
        ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);
 
        if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
                return_ACPI_STATUS(AE_OK);
        }
 
        /* Get the Buffer node */
 
        node = obj_desc->buffer.node;
        if (!node) {
                ACPI_ERROR((AE_INFO,
                            "No pointer back to NS node in buffer obj %p",
                            obj_desc));
                return_ACPI_STATUS(AE_AML_INTERNAL);
        }
 
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));
 
        /* Execute the AML code for the term_arg arguments */
 
        status = acpi_ds_execute_arguments(node, node,
                                           obj_desc->buffer.aml_length,
                                           obj_desc->buffer.aml_start);
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_get_package_arguments
 *
 * PARAMETERS:  obj_desc        - A valid Package object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get Package length and initializer byte list.  This implements
 *              the late evaluation of these attributes.
 *
 ******************************************************************************/
 
acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
{
        struct acpi_namespace_node *node;
        acpi_status status;
 
        ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);
 
        if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
                return_ACPI_STATUS(AE_OK);
        }
 
        /* Get the Package node */
 
        node = obj_desc->package.node;
        if (!node) {
                ACPI_ERROR((AE_INFO,
                            "No pointer back to NS node in package %p",
                            obj_desc));
                return_ACPI_STATUS(AE_AML_INTERNAL);
        }
 
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n"));
 
        /* Execute the AML code for the term_arg arguments */
 
        status = acpi_ds_execute_arguments(node, node,
                                           obj_desc->package.aml_length,
                                           obj_desc->package.aml_start);
        return_ACPI_STATUS(status);
}
 
/*****************************************************************************
 *
 * FUNCTION:    acpi_ds_get_region_arguments
 *
 * PARAMETERS:  obj_desc        - A valid region object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get region address and length.  This implements the late
 *              evaluation of these region attributes.
 *
 ****************************************************************************/
 
acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
{
        struct acpi_namespace_node *node;
        acpi_status status;
        union acpi_operand_object *extra_desc;
 
        ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);
 
        if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
                return_ACPI_STATUS(AE_OK);
        }
 
        extra_desc = acpi_ns_get_secondary_object(obj_desc);
        if (!extra_desc) {
                return_ACPI_STATUS(AE_NOT_EXIST);
        }
 
        /* Get the Region node */
 
        node = obj_desc->region.node;
 
        ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
                        (ACPI_TYPE_REGION, node, NULL));
 
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n",
                          acpi_ut_get_node_name(node),
                          extra_desc->extra.aml_start));
 
        /* Execute the argument AML */
 
        status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
                                           extra_desc->extra.aml_length,
                                           extra_desc->extra.aml_start);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        /* Validate the region address/length via the host OS */
 
        status = acpi_os_validate_address(obj_desc->region.space_id,
                                          obj_desc->region.address,
                                          (acpi_size) obj_desc->region.length);
        if (ACPI_FAILURE(status)) {
                /*
                 * Invalid address/length. We will emit an error message and mark
                 * the region as invalid, so that it will cause an additional error if
                 * it is ever used. Then return AE_OK.
                 */
                ACPI_EXCEPTION((AE_INFO, status,
                                "During address validation of OpRegion [%4.4s]",
                                node->name.ascii));
                obj_desc->common.flags |= AOPOBJ_INVALID;
                status = AE_OK;
        }
 
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_initialize_region
 *
 * PARAMETERS:  obj_handle      - Region namespace node
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Front end to ev_initialize_region
 *
 ******************************************************************************/
 
acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
{
        union acpi_operand_object *obj_desc;
        acpi_status status;
 
        obj_desc = acpi_ns_get_attached_object(obj_handle);
 
        /* Namespace is NOT locked */
 
        status = acpi_ev_initialize_region(obj_desc, FALSE);
        return (status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_init_buffer_field
 *
 * PARAMETERS:  aml_opcode      - create_xxx_field
 *              obj_desc        - buffer_field object
 *              buffer_desc     - Host Buffer
 *              offset_desc     - Offset into buffer
 *              length_desc     - Length of field (CREATE_FIELD_OP only)
 *              result_desc     - Where to store the result
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform actual initialization of a buffer field
 *
 ******************************************************************************/
 
static acpi_status
acpi_ds_init_buffer_field(u16 aml_opcode,
                          union acpi_operand_object *obj_desc,
                          union acpi_operand_object *buffer_desc,
                          union acpi_operand_object *offset_desc,
                          union acpi_operand_object *length_desc,
                          union acpi_operand_object *result_desc)
{
        u32 offset;
        u32 bit_offset;
        u32 bit_count;
        u8 field_flags;
        acpi_status status;
 
        ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
 
        /* Host object must be a Buffer */
 
        if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) {
                ACPI_ERROR((AE_INFO,
                            "Target of Create Field is not a Buffer object - %s",
                            acpi_ut_get_object_type_name(buffer_desc)));
 
                status = AE_AML_OPERAND_TYPE;
                goto cleanup;
        }
 
        /*
         * The last parameter to all of these opcodes (result_desc) started
         * out as a name_string, and should therefore now be a NS node
         * after resolution in acpi_ex_resolve_operands().
         */
        if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
                ACPI_ERROR((AE_INFO,
                            "(%s) destination not a NS Node [%s]",
                            acpi_ps_get_opcode_name(aml_opcode),
                            acpi_ut_get_descriptor_name(result_desc)));
 
                status = AE_AML_OPERAND_TYPE;
                goto cleanup;
        }
 
        offset = (u32) offset_desc->integer.value;
 
        /*
         * Setup the Bit offsets and counts, according to the opcode
         */
        switch (aml_opcode) {
        case AML_CREATE_FIELD_OP:
 
                /* Offset is in bits, count is in bits */
 
                field_flags = AML_FIELD_ACCESS_BYTE;
                bit_offset = offset;
                bit_count = (u32) length_desc->integer.value;
 
                /* Must have a valid (>0) bit count */
 
                if (bit_count == 0) {
                        ACPI_ERROR((AE_INFO,
                                    "Attempt to CreateField of length zero"));
                        status = AE_AML_OPERAND_VALUE;
                        goto cleanup;
                }
                break;
 
        case AML_CREATE_BIT_FIELD_OP:
 
                /* Offset is in bits, Field is one bit */
 
                bit_offset = offset;
                bit_count = 1;
                field_flags = AML_FIELD_ACCESS_BYTE;
                break;
 
        case AML_CREATE_BYTE_FIELD_OP:
 
                /* Offset is in bytes, field is one byte */
 
                bit_offset = 8 * offset;
                bit_count = 8;
                field_flags = AML_FIELD_ACCESS_BYTE;
                break;
 
        case AML_CREATE_WORD_FIELD_OP:
 
                /* Offset is in bytes, field is one word */
 
                bit_offset = 8 * offset;
                bit_count = 16;
                field_flags = AML_FIELD_ACCESS_WORD;
                break;
 
        case AML_CREATE_DWORD_FIELD_OP:
 
                /* Offset is in bytes, field is one dword */
 
                bit_offset = 8 * offset;
                bit_count = 32;
                field_flags = AML_FIELD_ACCESS_DWORD;
                break;
 
        case AML_CREATE_QWORD_FIELD_OP:
 
                /* Offset is in bytes, field is one qword */
 
                bit_offset = 8 * offset;
                bit_count = 64;
                field_flags = AML_FIELD_ACCESS_QWORD;
                break;
 
        default:
 
                ACPI_ERROR((AE_INFO,
                            "Unknown field creation opcode %02x", aml_opcode));
                status = AE_AML_BAD_OPCODE;
                goto cleanup;
        }
 
        /* Entire field must fit within the current length of the buffer */
 
        if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {
                ACPI_ERROR((AE_INFO,
                            "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)",
                            acpi_ut_get_node_name(result_desc),
                            bit_offset + bit_count,
                            acpi_ut_get_node_name(buffer_desc->buffer.node),
                            8 * (u32) buffer_desc->buffer.length));
                status = AE_AML_BUFFER_LIMIT;
                goto cleanup;
        }
 
        /*
         * Initialize areas of the field object that are common to all fields
         * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
         * UPDATE_RULE = 0 (UPDATE_PRESERVE)
         */
        status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
                                                  bit_offset, bit_count);
        if (ACPI_FAILURE(status)) {
                goto cleanup;
        }
 
        obj_desc->buffer_field.buffer_obj = buffer_desc;
 
        /* Reference count for buffer_desc inherits obj_desc count */
 
        buffer_desc->common.reference_count = (u16)
            (buffer_desc->common.reference_count +
             obj_desc->common.reference_count);
 
      cleanup:
 
        /* Always delete the operands */
 
        acpi_ut_remove_reference(offset_desc);
        acpi_ut_remove_reference(buffer_desc);
 
        if (aml_opcode == AML_CREATE_FIELD_OP) {
                acpi_ut_remove_reference(length_desc);
        }
 
        /* On failure, delete the result descriptor */
 
        if (ACPI_FAILURE(status)) {
                acpi_ut_remove_reference(result_desc);  /* Result descriptor */
        } else {
                /* Now the address and length are valid for this buffer_field */
 
                obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
        }
 
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_eval_buffer_field_operands
 *
 * PARAMETERS:  walk_state      - Current walk
 *              Op              - A valid buffer_field Op object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Get buffer_field Buffer and Index
 *              Called from acpi_ds_exec_end_op during buffer_field parse tree walk
 *
 ******************************************************************************/
 
acpi_status
acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
                                   union acpi_parse_object *op)
{
        acpi_status status;
        union acpi_operand_object *obj_desc;
        struct acpi_namespace_node *node;
        union acpi_parse_object *next_op;
 
        ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
 
        /*
         * This is where we evaluate the address and length fields of the
         * create_xxx_field declaration
         */
        node = op->common.node;
 
        /* next_op points to the op that holds the Buffer */
 
        next_op = op->common.value.arg;
 
        /* Evaluate/create the address and length operands */
 
        status = acpi_ds_create_operands(walk_state, next_op);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        obj_desc = acpi_ns_get_attached_object(node);
        if (!obj_desc) {
                return_ACPI_STATUS(AE_NOT_EXIST);
        }
 
        /* Resolve the operands */
 
        status = acpi_ex_resolve_operands(op->common.aml_opcode,
                                          ACPI_WALK_OPERANDS, walk_state);
 
        ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE,
                           acpi_ps_get_opcode_name(op->common.aml_opcode),
                           walk_state->num_operands,
                           "after AcpiExResolveOperands");
 
        if (ACPI_FAILURE(status)) {
                ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)",
                            acpi_ps_get_opcode_name(op->common.aml_opcode),
                            status));
 
                return_ACPI_STATUS(status);
        }
 
        /* Initialize the Buffer Field */
 
        if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
 
                /* NOTE: Slightly different operands for this opcode */
 
                status =
                    acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
                                              walk_state->operands[0],
                                              walk_state->operands[1],
                                              walk_state->operands[2],
                                              walk_state->operands[3]);
        } else {
                /* All other, create_xxx_field opcodes */
 
                status =
                    acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
                                              walk_state->operands[0],
                                              walk_state->operands[1], NULL,
                                              walk_state->operands[2]);
        }
 
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_eval_region_operands
 *
 * PARAMETERS:  walk_state      - Current walk
 *              Op              - A valid region Op object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Get region address and length
 *              Called from acpi_ds_exec_end_op during op_region parse tree walk
 *
 ******************************************************************************/
 
acpi_status
acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
                             union acpi_parse_object *op)
{
        acpi_status status;
        union acpi_operand_object *obj_desc;
        union acpi_operand_object *operand_desc;
        struct acpi_namespace_node *node;
        union acpi_parse_object *next_op;
 
        ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
 
        /*
         * This is where we evaluate the address and length fields of the
         * op_region declaration
         */
        node = op->common.node;
 
        /* next_op points to the op that holds the space_iD */
 
        next_op = op->common.value.arg;
 
        /* next_op points to address op */
 
        next_op = next_op->common.next;
 
        /* Evaluate/create the address and length operands */
 
        status = acpi_ds_create_operands(walk_state, next_op);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        /* Resolve the length and address operands to numbers */
 
        status = acpi_ex_resolve_operands(op->common.aml_opcode,
                                          ACPI_WALK_OPERANDS, walk_state);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE,
                           acpi_ps_get_opcode_name(op->common.aml_opcode),
                           1, "after AcpiExResolveOperands");
 
        obj_desc = acpi_ns_get_attached_object(node);
        if (!obj_desc) {
                return_ACPI_STATUS(AE_NOT_EXIST);
        }
 
        /*
         * Get the length operand and save it
         * (at Top of stack)
         */
        operand_desc = walk_state->operands[walk_state->num_operands - 1];
 
        obj_desc->region.length = (u32) operand_desc->integer.value;
        acpi_ut_remove_reference(operand_desc);
 
        /*
         * Get the address and save it
         * (at top of stack - 1)
         */
        operand_desc = walk_state->operands[walk_state->num_operands - 2];
 
        obj_desc->region.address = (acpi_physical_address)
            operand_desc->integer.value;
        acpi_ut_remove_reference(operand_desc);
 
        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
                          obj_desc,
                          ACPI_FORMAT_UINT64(obj_desc->region.address),
                          obj_desc->region.length));
 
        /* Now the address and length are valid for this opregion */
 
        obj_desc->region.flags |= AOPOBJ_DATA_VALID;
 
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_eval_data_object_operands
 *
 * PARAMETERS:  walk_state      - Current walk
 *              Op              - A valid data_object Op object
 *              obj_desc        - data_object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Get the operands and complete the following data object types:
 *              Buffer, Package.
 *
 ******************************************************************************/
 
acpi_status
acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
                                  union acpi_parse_object *op,
                                  union acpi_operand_object *obj_desc)
{
        acpi_status status;
        union acpi_operand_object *arg_desc;
        u32 length;
 
        ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
 
        /* The first operand (for all of these data objects) is the length */
 
        status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        status = acpi_ex_resolve_operands(walk_state->opcode,
                                          &(walk_state->
                                            operands[walk_state->num_operands -
                                                     1]), walk_state);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        /* Extract length operand */
 
        arg_desc = walk_state->operands[walk_state->num_operands - 1];
        length = (u32) arg_desc->integer.value;
 
        /* Cleanup for length operand */
 
        status = acpi_ds_obj_stack_pop(1, walk_state);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
        acpi_ut_remove_reference(arg_desc);
 
        /*
         * Create the actual data object
         */
        switch (op->common.aml_opcode) {
        case AML_BUFFER_OP:
 
                status =
                    acpi_ds_build_internal_buffer_obj(walk_state, op, length,
                                                      &obj_desc);
                break;
 
        case AML_PACKAGE_OP:
        case AML_VAR_PACKAGE_OP:
 
                status =
                    acpi_ds_build_internal_package_obj(walk_state, op, length,
                                                       &obj_desc);
                break;
 
        default:
                return_ACPI_STATUS(AE_AML_BAD_OPCODE);
        }
 
        if (ACPI_SUCCESS(status)) {
                /*
                 * Return the object in the walk_state, unless the parent is a package -
                 * in this case, the return object will be stored in the parse tree
                 * for the package.
                 */
                if ((!op->common.parent) ||
                    ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
                     (op->common.parent->common.aml_opcode !=
                      AML_VAR_PACKAGE_OP)
                     && (op->common.parent->common.aml_opcode != AML_NAME_OP))) {
                        walk_state->result_obj = obj_desc;
                }
        }
 
        return_ACPI_STATUS(status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_exec_begin_control_op
 *
 * PARAMETERS:  walk_list       - The list that owns the walk stack
 *              Op              - The control Op
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handles all control ops encountered during control method
 *              execution.
 *
 ******************************************************************************/
 
acpi_status
acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state,
                              union acpi_parse_object *op)
{
        acpi_status status = AE_OK;
        union acpi_generic_state *control_state;
 
        ACPI_FUNCTION_NAME(ds_exec_begin_control_op);
 
        ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op,
                          op->common.aml_opcode, walk_state));
 
        switch (op->common.aml_opcode) {
        case AML_IF_OP:
        case AML_WHILE_OP:
 
                /*
                 * IF/WHILE: Create a new control state to manage these
                 * constructs. We need to manage these as a stack, in order
                 * to handle nesting.
                 */
                control_state = acpi_ut_create_control_state();
                if (!control_state) {
                        status = AE_NO_MEMORY;
                        break;
                }
                /*
                 * Save a pointer to the predicate for multiple executions
                 * of a loop
                 */
                control_state->control.aml_predicate_start =
                    walk_state->parser_state.aml - 1;
                control_state->control.package_end =
                    walk_state->parser_state.pkg_end;
                control_state->control.opcode = op->common.aml_opcode;
 
                /* Push the control state on this walk's control stack */
 
                acpi_ut_push_generic_state(&walk_state->control_state,
                                           control_state);
                break;
 
        case AML_ELSE_OP:
 
                /* Predicate is in the state object */
                /* If predicate is true, the IF was executed, ignore ELSE part */
 
                if (walk_state->last_predicate) {
                        status = AE_CTRL_TRUE;
                }
 
                break;
 
        case AML_RETURN_OP:
 
                break;
 
        default:
                break;
        }
 
        return (status);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_exec_end_control_op
 *
 * PARAMETERS:  walk_list       - The list that owns the walk stack
 *              Op              - The control Op
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handles all control ops encountered during control method
 *              execution.
 *
 ******************************************************************************/
 
acpi_status
acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
                            union acpi_parse_object * op)
{
        acpi_status status = AE_OK;
        union acpi_generic_state *control_state;
 
        ACPI_FUNCTION_NAME(ds_exec_end_control_op);
 
        switch (op->common.aml_opcode) {
        case AML_IF_OP:
 
                ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op));
 
                /*
                 * Save the result of the predicate in case there is an
                 * ELSE to come
                 */
                walk_state->last_predicate =
                    (u8) walk_state->control_state->common.value;
 
                /*
                 * Pop the control state that was created at the start
                 * of the IF and free it
                 */
                control_state =
                    acpi_ut_pop_generic_state(&walk_state->control_state);
                acpi_ut_delete_generic_state(control_state);
                break;
 
        case AML_ELSE_OP:
 
                break;
 
        case AML_WHILE_OP:
 
                ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op));
 
                if (walk_state->control_state->common.value) {
 
                        /* Predicate was true, go back and evaluate it again! */
 
                        status = AE_CTRL_PENDING;
                }
 
                ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                  "[WHILE_OP] termination! Op=%p\n", op));
 
                /* Pop this control state and free it */
 
                control_state =
                    acpi_ut_pop_generic_state(&walk_state->control_state);
 
                walk_state->aml_last_while =
                    control_state->control.aml_predicate_start;
                acpi_ut_delete_generic_state(control_state);
                break;
 
        case AML_RETURN_OP:
 
                ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                  "[RETURN_OP] Op=%p Arg=%p\n", op,
                                  op->common.value.arg));
 
                /*
                 * One optional operand -- the return value
                 * It can be either an immediate operand or a result that
                 * has been bubbled up the tree
                 */
                if (op->common.value.arg) {
 
                        /* Since we have a real Return(), delete any implicit return */
 
                        acpi_ds_clear_implicit_return(walk_state);
 
                        /* Return statement has an immediate operand */
 
                        status =
                            acpi_ds_create_operands(walk_state,
                                                    op->common.value.arg);
                        if (ACPI_FAILURE(status)) {
                                return (status);
                        }
 
                        /*
                         * If value being returned is a Reference (such as
                         * an arg or local), resolve it now because it may
                         * cease to exist at the end of the method.
                         */
                        status =
                            acpi_ex_resolve_to_value(&walk_state->operands[0],
                                                     walk_state);
                        if (ACPI_FAILURE(status)) {
                                return (status);
                        }
 
                        /*
                         * Get the return value and save as the last result
                         * value.  This is the only place where walk_state->return_desc
                         * is set to anything other than zero!
                         */
                        walk_state->return_desc = walk_state->operands[0];
                } else if ((walk_state->results) &&
                           (walk_state->results->results.num_results > 0)) {
 
                        /* Since we have a real Return(), delete any implicit return */
 
                        acpi_ds_clear_implicit_return(walk_state);
 
                        /*
                         * The return value has come from a previous calculation.
                         *
                         * If value being returned is a Reference (such as
                         * an arg or local), resolve it now because it may
                         * cease to exist at the end of the method.
                         *
                         * Allow references created by the Index operator to return unchanged.
                         */
                        if ((ACPI_GET_DESCRIPTOR_TYPE
                             (walk_state->results->results.obj_desc[0]) ==
                             ACPI_DESC_TYPE_OPERAND)
                            &&
                            (ACPI_GET_OBJECT_TYPE
                             (walk_state->results->results.obj_desc[0]) ==
                             ACPI_TYPE_LOCAL_REFERENCE)
                            && ((walk_state->results->results.obj_desc[0])->
                                reference.opcode != AML_INDEX_OP)) {
                                status =
                                    acpi_ex_resolve_to_value(&walk_state->
                                                             results->results.
                                                             obj_desc[0],
                                                             walk_state);
                                if (ACPI_FAILURE(status)) {
                                        return (status);
                                }
                        }
 
                        walk_state->return_desc =
                            walk_state->results->results.obj_desc[0];
                } else {
                        /* No return operand */
 
                        if (walk_state->num_operands) {
                                acpi_ut_remove_reference(walk_state->
                                                         operands[0]);
                        }
 
                        walk_state->operands[0] = NULL;
                        walk_state->num_operands = 0;
                        walk_state->return_desc = NULL;
                }
 
                ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
                                  "Completed RETURN_OP State=%p, RetVal=%p\n",
                                  walk_state, walk_state->return_desc));
 
                /* End the control method execution right now */
 
                status = AE_CTRL_TERMINATE;
                break;
 
        case AML_NOOP_OP:
 
                /* Just do nothing! */
                break;
 
        case AML_BREAK_POINT_OP:
 
                /* Call up to the OS service layer to handle this */
 
                status =
                    acpi_os_signal(ACPI_SIGNAL_BREAKPOINT,
                                   "Executed AML Breakpoint opcode");
 
                /* If and when it returns, all done. */
 
                break;
 
        case AML_BREAK_OP:
        case AML_CONTINUE_OP:   /* ACPI 2.0 */
 
                /* Pop and delete control states until we find a while */
 
                while (walk_state->control_state &&
                       (walk_state->control_state->control.opcode !=
                        AML_WHILE_OP)) {
                        control_state =
                            acpi_ut_pop_generic_state(&walk_state->
                                                      control_state);
                        acpi_ut_delete_generic_state(control_state);
                }
 
                /* No while found? */
 
                if (!walk_state->control_state) {
                        return (AE_AML_NO_WHILE);
                }
 
                /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */
 
                walk_state->aml_last_while =
                    walk_state->control_state->control.package_end;
 
                /* Return status depending on opcode */
 
                if (op->common.aml_opcode == AML_BREAK_OP) {
                        status = AE_CTRL_BREAK;
                } else {
                        status = AE_CTRL_CONTINUE;
                }
                break;
 
        default:
 
                ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p",
                            op->common.aml_opcode, op));
 
                status = AE_AML_BAD_OPCODE;
                break;
        }
 
        return (status);
}
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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [acpi/] [dispatcher/] [dsopcode.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/******************************************************************************`
2			`*`
3			`* Module Name: dsopcode - Dispatcher Op Region support and handling of`
4			`* "control" opcodes`
5			`*`
6			`*****************************************************************************/`
7
8			`/*`
9			`* Copyright (C) 2000 - 2007, R. Byron Moore`
10			`* All rights reserved.`
11			`*`
12			`* Redistribution and use in source and binary forms, with or without`
13			`* modification, are permitted provided that the following conditions`
14			`* are met:`
15			`* 1. Redistributions of source code must retain the above copyright`
16			`* notice, this list of conditions, and the following disclaimer,`
17			`* without modification.`
18			`* 2. Redistributions in binary form must reproduce at minimum a disclaimer`
19			`* substantially similar to the "NO WARRANTY" disclaimer below`
20			`* ("Disclaimer") and any redistribution must be conditioned upon`
21			`* including a substantially similar Disclaimer requirement for further`
22			`* binary redistribution.`
23			`* 3. Neither the names of the above-listed copyright holders nor the names`
24			`* of any contributors may be used to endorse or promote products derived`
25			`* from this software without specific prior written permission.`
26			`*`
27			`* Alternatively, this software may be distributed under the terms of the`
28			`* GNU General Public License ("GPL") version 2 as published by the Free`
29			`* Software Foundation.`
30			`*`
31			`* NO WARRANTY`
32			`* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS`
33			`* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT`
34			`* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR`
35			`* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT`
36			`* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL`
37			`* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS`
38			`* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)`
39			`* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,`
40			`* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING`