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Diffstat (limited to 'drivers/acpi/executer/exprep.c')
| -rw-r--r-- | drivers/acpi/executer/exprep.c | 589 |
1 files changed, 0 insertions, 589 deletions
diff --git a/drivers/acpi/executer/exprep.c b/drivers/acpi/executer/exprep.c deleted file mode 100644 index 5d438c32989d..000000000000 --- a/drivers/acpi/executer/exprep.c +++ /dev/null @@ -1,589 +0,0 @@ - -/****************************************************************************** - * - * Module Name: exprep - ACPI AML (p-code) execution - field prep utilities - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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 <acpi/acinterp.h> -#include <acpi/amlcode.h> -#include <acpi/acnamesp.h> - -#define _COMPONENT ACPI_EXECUTER -ACPI_MODULE_NAME("exprep") - -/* Local prototypes */ -static u32 -acpi_ex_decode_field_access(union acpi_operand_object *obj_desc, - u8 field_flags, u32 * return_byte_alignment); - -#ifdef ACPI_UNDER_DEVELOPMENT - -static u32 -acpi_ex_generate_access(u32 field_bit_offset, - u32 field_bit_length, u32 region_length); - -/******************************************************************************* - * - * FUNCTION: acpi_ex_generate_access - * - * PARAMETERS: field_bit_offset - Start of field within parent region/buffer - * field_bit_length - Length of field in bits - * region_length - Length of parent in bytes - * - * RETURN: Field granularity (8, 16, 32 or 64) and - * byte_alignment (1, 2, 3, or 4) - * - * DESCRIPTION: Generate an optimal access width for fields defined with the - * any_acc keyword. - * - * NOTE: Need to have the region_length in order to check for boundary - * conditions (end-of-region). However, the region_length is a deferred - * operation. Therefore, to complete this implementation, the generation - * of this access width must be deferred until the region length has - * been evaluated. - * - ******************************************************************************/ - -static u32 -acpi_ex_generate_access(u32 field_bit_offset, - u32 field_bit_length, u32 region_length) -{ - u32 field_byte_length; - u32 field_byte_offset; - u32 field_byte_end_offset; - u32 access_byte_width; - u32 field_start_offset; - u32 field_end_offset; - u32 minimum_access_width = 0xFFFFFFFF; - u32 minimum_accesses = 0xFFFFFFFF; - u32 accesses; - - ACPI_FUNCTION_TRACE(ex_generate_access); - - /* Round Field start offset and length to "minimal" byte boundaries */ - - field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8)); - field_byte_end_offset = ACPI_DIV_8(ACPI_ROUND_UP(field_bit_length + - field_bit_offset, 8)); - field_byte_length = field_byte_end_offset - field_byte_offset; - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Bit length %d, Bit offset %d\n", - field_bit_length, field_bit_offset)); - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Byte Length %d, Byte Offset %d, End Offset %d\n", - field_byte_length, field_byte_offset, - field_byte_end_offset)); - - /* - * Iterative search for the maximum access width that is both aligned - * and does not go beyond the end of the region - * - * Start at byte_acc and work upwards to qword_acc max. (1,2,4,8 bytes) - */ - for (access_byte_width = 1; access_byte_width <= 8; - access_byte_width <<= 1) { - /* - * 1) Round end offset up to next access boundary and make sure that - * this does not go beyond the end of the parent region. - * 2) When the Access width is greater than the field_byte_length, we - * are done. (This does not optimize for the perfectly aligned - * case yet). - */ - if (ACPI_ROUND_UP(field_byte_end_offset, access_byte_width) <= - region_length) { - field_start_offset = - ACPI_ROUND_DOWN(field_byte_offset, - access_byte_width) / - access_byte_width; - - field_end_offset = - ACPI_ROUND_UP((field_byte_length + - field_byte_offset), - access_byte_width) / - access_byte_width; - - accesses = field_end_offset - field_start_offset; - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "AccessWidth %d end is within region\n", - access_byte_width)); - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Field Start %d, Field End %d -- requires %d accesses\n", - field_start_offset, field_end_offset, - accesses)); - - /* Single access is optimal */ - - if (accesses <= 1) { - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Entire field can be accessed with one operation of size %d\n", - access_byte_width)); - return_VALUE(access_byte_width); - } - - /* - * Fits in the region, but requires more than one read/write. - * try the next wider access on next iteration - */ - if (accesses < minimum_accesses) { - minimum_accesses = accesses; - minimum_access_width = access_byte_width; - } - } else { - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "AccessWidth %d end is NOT within region\n", - access_byte_width)); - if (access_byte_width == 1) { - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Field goes beyond end-of-region!\n")); - - /* Field does not fit in the region at all */ - - return_VALUE(0); - } - - /* - * This width goes beyond the end-of-region, back off to - * previous access - */ - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Backing off to previous optimal access width of %d\n", - minimum_access_width)); - return_VALUE(minimum_access_width); - } - } - - /* - * Could not read/write field with one operation, - * just use max access width - */ - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Cannot access field in one operation, using width 8\n")); - return_VALUE(8); -} -#endif /* ACPI_UNDER_DEVELOPMENT */ - -/******************************************************************************* - * - * FUNCTION: acpi_ex_decode_field_access - * - * PARAMETERS: obj_desc - Field object - * field_flags - Encoded fieldflags (contains access bits) - * return_byte_alignment - Where the byte alignment is returned - * - * RETURN: Field granularity (8, 16, 32 or 64) and - * byte_alignment (1, 2, 3, or 4) - * - * DESCRIPTION: Decode the access_type bits of a field definition. - * - ******************************************************************************/ - -static u32 -acpi_ex_decode_field_access(union acpi_operand_object *obj_desc, - u8 field_flags, u32 * return_byte_alignment) -{ - u32 access; - u32 byte_alignment; - u32 bit_length; - - ACPI_FUNCTION_TRACE(ex_decode_field_access); - - access = (field_flags & AML_FIELD_ACCESS_TYPE_MASK); - - switch (access) { - case AML_FIELD_ACCESS_ANY: - -#ifdef ACPI_UNDER_DEVELOPMENT - byte_alignment = - acpi_ex_generate_access(obj_desc->common_field. - start_field_bit_offset, - obj_desc->common_field.bit_length, - 0xFFFFFFFF - /* Temp until we pass region_length as parameter */ - ); - bit_length = byte_alignment * 8; -#endif - - byte_alignment = 1; - bit_length = 8; - break; - - case AML_FIELD_ACCESS_BYTE: - case AML_FIELD_ACCESS_BUFFER: /* ACPI 2.0 (SMBus Buffer) */ - byte_alignment = 1; - bit_length = 8; - break; - - case AML_FIELD_ACCESS_WORD: - byte_alignment = 2; - bit_length = 16; - break; - - case AML_FIELD_ACCESS_DWORD: - byte_alignment = 4; - bit_length = 32; - break; - - case AML_FIELD_ACCESS_QWORD: /* ACPI 2.0 */ - byte_alignment = 8; - bit_length = 64; - break; - - default: - /* Invalid field access type */ - - ACPI_ERROR((AE_INFO, "Unknown field access type %X", access)); - return_UINT32(0); - } - - if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_BUFFER_FIELD) { - /* - * buffer_field access can be on any byte boundary, so the - * byte_alignment is always 1 byte -- regardless of any byte_alignment - * implied by the field access type. - */ - byte_alignment = 1; - } - - *return_byte_alignment = byte_alignment; - return_UINT32(bit_length); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ex_prep_common_field_object - * - * PARAMETERS: obj_desc - The field object - * field_flags - Access, lock_rule, and update_rule. - * The format of a field_flag is described - * in the ACPI specification - * field_attribute - Special attributes (not used) - * field_bit_position - Field start position - * field_bit_length - Field length in number of bits - * - * RETURN: Status - * - * DESCRIPTION: Initialize the areas of the field object that are common - * to the various types of fields. Note: This is very "sensitive" - * code because we are solving the general case for field - * alignment. - * - ******************************************************************************/ - -acpi_status -acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc, - u8 field_flags, - u8 field_attribute, - u32 field_bit_position, u32 field_bit_length) -{ - u32 access_bit_width; - u32 byte_alignment; - u32 nearest_byte_address; - - ACPI_FUNCTION_TRACE(ex_prep_common_field_object); - - /* - * Note: the structure being initialized is the - * ACPI_COMMON_FIELD_INFO; No structure fields outside of the common - * area are initialized by this procedure. - */ - obj_desc->common_field.field_flags = field_flags; - obj_desc->common_field.attribute = field_attribute; - obj_desc->common_field.bit_length = field_bit_length; - - /* - * Decode the access type so we can compute offsets. The access type gives - * two pieces of information - the width of each field access and the - * necessary byte_alignment (address granularity) of the access. - * - * For any_acc, the access_bit_width is the largest width that is both - * necessary and possible in an attempt to access the whole field in one - * I/O operation. However, for any_acc, the byte_alignment is always one - * byte. - * - * For all Buffer Fields, the byte_alignment is always one byte. - * - * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is - * the same (equivalent) as the byte_alignment. - */ - access_bit_width = acpi_ex_decode_field_access(obj_desc, field_flags, - &byte_alignment); - if (!access_bit_width) { - return_ACPI_STATUS(AE_AML_OPERAND_VALUE); - } - - /* Setup width (access granularity) fields */ - - obj_desc->common_field.access_byte_width = (u8) - ACPI_DIV_8(access_bit_width); /* 1, 2, 4, 8 */ - - obj_desc->common_field.access_bit_width = (u8) access_bit_width; - - /* - * base_byte_offset is the address of the start of the field within the - * region. It is the byte address of the first *datum* (field-width data - * unit) of the field. (i.e., the first datum that contains at least the - * first *bit* of the field.) - * - * Note: byte_alignment is always either equal to the access_bit_width or 8 - * (Byte access), and it defines the addressing granularity of the parent - * region or buffer. - */ - nearest_byte_address = - ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position); - obj_desc->common_field.base_byte_offset = (u32) - ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment); - - /* - * start_field_bit_offset is the offset of the first bit of the field within - * a field datum. - */ - obj_desc->common_field.start_field_bit_offset = (u8) - (field_bit_position - - ACPI_MUL_8(obj_desc->common_field.base_byte_offset)); - - /* - * Does the entire field fit within a single field access element? (datum) - * (i.e., without crossing a datum boundary) - */ - if ((obj_desc->common_field.start_field_bit_offset + - field_bit_length) <= (u16) access_bit_width) { - obj_desc->common.flags |= AOPOBJ_SINGLE_DATUM; - } - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ex_prep_field_value - * - * PARAMETERS: Info - Contains all field creation info - * - * RETURN: Status - * - * DESCRIPTION: Construct an union acpi_operand_object of type def_field and - * connect it to the parent Node. - * - ******************************************************************************/ - -acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) -{ - union acpi_operand_object *obj_desc; - union acpi_operand_object *second_desc = NULL; - u32 type; - acpi_status status; - - ACPI_FUNCTION_TRACE(ex_prep_field_value); - - /* Parameter validation */ - - if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) { - if (!info->region_node) { - ACPI_ERROR((AE_INFO, "Null RegionNode")); - return_ACPI_STATUS(AE_AML_NO_OPERAND); - } - - type = acpi_ns_get_type(info->region_node); - if (type != ACPI_TYPE_REGION) { - ACPI_ERROR((AE_INFO, - "Needed Region, found type %X (%s)", - type, acpi_ut_get_type_name(type))); - - return_ACPI_STATUS(AE_AML_OPERAND_TYPE); - } - } - - /* Allocate a new field object */ - - obj_desc = acpi_ut_create_internal_object(info->field_type); - if (!obj_desc) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* Initialize areas of the object that are common to all fields */ - - obj_desc->common_field.node = info->field_node; - status = acpi_ex_prep_common_field_object(obj_desc, info->field_flags, - info->attribute, - info->field_bit_position, - info->field_bit_length); - if (ACPI_FAILURE(status)) { - acpi_ut_delete_object_desc(obj_desc); - return_ACPI_STATUS(status); - } - - /* Initialize areas of the object that are specific to the field type */ - - switch (info->field_type) { - case ACPI_TYPE_LOCAL_REGION_FIELD: - - obj_desc->field.region_obj = - acpi_ns_get_attached_object(info->region_node); - - /* An additional reference for the container */ - - acpi_ut_add_reference(obj_desc->field.region_obj); - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n", - obj_desc->field.start_field_bit_offset, - obj_desc->field.base_byte_offset, - obj_desc->field.access_byte_width, - obj_desc->field.region_obj)); - break; - - case ACPI_TYPE_LOCAL_BANK_FIELD: - - obj_desc->bank_field.value = info->bank_value; - obj_desc->bank_field.region_obj = - acpi_ns_get_attached_object(info->region_node); - obj_desc->bank_field.bank_obj = - acpi_ns_get_attached_object(info->register_node); - - /* An additional reference for the attached objects */ - - acpi_ut_add_reference(obj_desc->bank_field.region_obj); - acpi_ut_add_reference(obj_desc->bank_field.bank_obj); - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Bank Field: BitOff %X, Off %X, Gran %X, Region %p, BankReg %p\n", - obj_desc->bank_field.start_field_bit_offset, - obj_desc->bank_field.base_byte_offset, - obj_desc->field.access_byte_width, - obj_desc->bank_field.region_obj, - obj_desc->bank_field.bank_obj)); - - /* - * Remember location in AML stream of the field unit - * opcode and operands -- since the bank_value - * operands must be evaluated. - */ - second_desc = obj_desc->common.next_object; - second_desc->extra.aml_start = - ACPI_CAST_PTR(union acpi_parse_object, - info->data_register_node)->named.data; - second_desc->extra.aml_length = - ACPI_CAST_PTR(union acpi_parse_object, - info->data_register_node)->named.length; - - break; - - case ACPI_TYPE_LOCAL_INDEX_FIELD: - - /* Get the Index and Data registers */ - - obj_desc->index_field.index_obj = - acpi_ns_get_attached_object(info->register_node); - obj_desc->index_field.data_obj = - acpi_ns_get_attached_object(info->data_register_node); - - if (!obj_desc->index_field.data_obj - || !obj_desc->index_field.index_obj) { - ACPI_ERROR((AE_INFO, - "Null Index Object during field prep")); - acpi_ut_delete_object_desc(obj_desc); - return_ACPI_STATUS(AE_AML_INTERNAL); - } - - /* An additional reference for the attached objects */ - - acpi_ut_add_reference(obj_desc->index_field.data_obj); - acpi_ut_add_reference(obj_desc->index_field.index_obj); - - /* - * April 2006: Changed to match MS behavior - * - * The value written to the Index register is the byte offset of the - * target field in units of the granularity of the index_field - * - * Previously, the value was calculated as an index in terms of the - * width of the Data register, as below: - * - * obj_desc->index_field.Value = (u32) - * (Info->field_bit_position / ACPI_MUL_8 ( - * obj_desc->Field.access_byte_width)); - * - * February 2006: Tried value as a byte offset: - * obj_desc->index_field.Value = (u32) - * ACPI_DIV_8 (Info->field_bit_position); - */ - obj_desc->index_field.value = - (u32) ACPI_ROUND_DOWN(ACPI_DIV_8(info->field_bit_position), - obj_desc->index_field. - access_byte_width); - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "IndexField: BitOff %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n", - obj_desc->index_field.start_field_bit_offset, - obj_desc->index_field.base_byte_offset, - obj_desc->index_field.value, - obj_desc->field.access_byte_width, - obj_desc->index_field.index_obj, - obj_desc->index_field.data_obj)); - break; - - default: - /* No other types should get here */ - break; - } - - /* - * Store the constructed descriptor (obj_desc) into the parent Node, - * preserving the current type of that named_obj. - */ - status = acpi_ns_attach_object(info->field_node, obj_desc, - acpi_ns_get_type(info->field_node)); - - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, - "Set NamedObj %p [%4.4s], ObjDesc %p\n", - info->field_node, - acpi_ut_get_node_name(info->field_node), obj_desc)); - - /* Remove local reference to the object */ - - acpi_ut_remove_reference(obj_desc); - return_ACPI_STATUS(status); -} |