763 lines
20 KiB
C
763 lines
20 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: dsopcode - Dispatcher support for regions and fields
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*
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* Copyright (C) 2000 - 2023, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#include "actables.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dsopcode")
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/* Local prototypes */
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static acpi_status
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acpi_ds_init_buffer_field(u16 aml_opcode,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object *buffer_desc,
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union acpi_operand_object *offset_desc,
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union acpi_operand_object *length_desc,
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union acpi_operand_object *result_desc);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_initialize_region
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*
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* PARAMETERS: obj_handle - Region namespace node
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*
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* RETURN: Status
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*
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* DESCRIPTION: Front end to ev_initialize_region
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*
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******************************************************************************/
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acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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obj_desc = acpi_ns_get_attached_object(obj_handle);
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/* Namespace is NOT locked */
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status = acpi_ev_initialize_region(obj_desc);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_init_buffer_field
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*
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* PARAMETERS: aml_opcode - create_xxx_field
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* obj_desc - buffer_field object
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* buffer_desc - Host Buffer
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* offset_desc - Offset into buffer
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* length_desc - Length of field (CREATE_FIELD_OP only)
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* result_desc - Where to store the result
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform actual initialization of a buffer field
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*
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******************************************************************************/
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static acpi_status
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acpi_ds_init_buffer_field(u16 aml_opcode,
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union acpi_operand_object *obj_desc,
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union acpi_operand_object *buffer_desc,
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union acpi_operand_object *offset_desc,
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union acpi_operand_object *length_desc,
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union acpi_operand_object *result_desc)
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{
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u32 offset;
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u32 bit_offset;
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u32 bit_count;
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u8 field_flags;
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acpi_status status;
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ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
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/* Host object must be a Buffer */
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if (buffer_desc->common.type != ACPI_TYPE_BUFFER) {
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ACPI_ERROR((AE_INFO,
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"Target of Create Field is not a Buffer object - %s",
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acpi_ut_get_object_type_name(buffer_desc)));
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status = AE_AML_OPERAND_TYPE;
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goto cleanup;
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}
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/*
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* The last parameter to all of these opcodes (result_desc) started
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* out as a name_string, and should therefore now be a NS node
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* after resolution in acpi_ex_resolve_operands().
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
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ACPI_ERROR((AE_INFO,
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"(%s) destination not a NS Node [%s]",
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acpi_ps_get_opcode_name(aml_opcode),
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acpi_ut_get_descriptor_name(result_desc)));
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status = AE_AML_OPERAND_TYPE;
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goto cleanup;
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}
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offset = (u32) offset_desc->integer.value;
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/*
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* Setup the Bit offsets and counts, according to the opcode
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*/
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switch (aml_opcode) {
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case AML_CREATE_FIELD_OP:
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/* Offset is in bits, count is in bits */
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field_flags = AML_FIELD_ACCESS_BYTE;
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bit_offset = offset;
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bit_count = (u32) length_desc->integer.value;
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/* Must have a valid (>0) bit count */
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if (bit_count == 0) {
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ACPI_BIOS_ERROR((AE_INFO,
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"Attempt to CreateField of length zero"));
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status = AE_AML_OPERAND_VALUE;
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goto cleanup;
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}
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break;
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case AML_CREATE_BIT_FIELD_OP:
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/* Offset is in bits, Field is one bit */
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bit_offset = offset;
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bit_count = 1;
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field_flags = AML_FIELD_ACCESS_BYTE;
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break;
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case AML_CREATE_BYTE_FIELD_OP:
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/* Offset is in bytes, field is one byte */
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bit_offset = 8 * offset;
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bit_count = 8;
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field_flags = AML_FIELD_ACCESS_BYTE;
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break;
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case AML_CREATE_WORD_FIELD_OP:
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/* Offset is in bytes, field is one word */
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bit_offset = 8 * offset;
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bit_count = 16;
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field_flags = AML_FIELD_ACCESS_WORD;
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break;
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case AML_CREATE_DWORD_FIELD_OP:
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/* Offset is in bytes, field is one dword */
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bit_offset = 8 * offset;
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bit_count = 32;
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field_flags = AML_FIELD_ACCESS_DWORD;
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break;
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case AML_CREATE_QWORD_FIELD_OP:
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/* Offset is in bytes, field is one qword */
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bit_offset = 8 * offset;
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bit_count = 64;
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field_flags = AML_FIELD_ACCESS_QWORD;
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unknown field creation opcode 0x%02X",
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aml_opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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/* Entire field must fit within the current length of the buffer */
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if ((bit_offset + bit_count) > (8 * (u32)buffer_desc->buffer.length)) {
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status = AE_AML_BUFFER_LIMIT;
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ACPI_BIOS_EXCEPTION((AE_INFO, status,
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"Field [%4.4s] at bit offset/length %u/%u "
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"exceeds size of target Buffer (%u bits)",
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acpi_ut_get_node_name(result_desc),
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bit_offset, bit_count,
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8 * (u32)buffer_desc->buffer.length));
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goto cleanup;
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}
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/*
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* Initialize areas of the field object that are common to all fields
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* For field_flags, use LOCK_RULE = 0 (NO_LOCK),
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* UPDATE_RULE = 0 (UPDATE_PRESERVE)
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*/
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status =
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acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
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bit_offset, bit_count);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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obj_desc->buffer_field.buffer_obj = buffer_desc;
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obj_desc->buffer_field.is_create_field =
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aml_opcode == AML_CREATE_FIELD_OP;
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/* Reference count for buffer_desc inherits obj_desc count */
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buffer_desc->common.reference_count = (u16)
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(buffer_desc->common.reference_count +
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obj_desc->common.reference_count);
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cleanup:
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/* Always delete the operands */
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acpi_ut_remove_reference(offset_desc);
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acpi_ut_remove_reference(buffer_desc);
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if (aml_opcode == AML_CREATE_FIELD_OP) {
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acpi_ut_remove_reference(length_desc);
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}
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/* On failure, delete the result descriptor */
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(result_desc); /* Result descriptor */
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} else {
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/* Now the address and length are valid for this buffer_field */
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obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_eval_buffer_field_operands
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*
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* PARAMETERS: walk_state - Current walk
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* op - A valid buffer_field Op object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get buffer_field Buffer and Index
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* Called from acpi_ds_exec_end_op during buffer_field parse tree walk
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*
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******************************************************************************/
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acpi_status
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acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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struct acpi_namespace_node *node;
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union acpi_parse_object *next_op;
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ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
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/*
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* This is where we evaluate the address and length fields of the
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* create_xxx_field declaration
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*/
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node = op->common.node;
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/* next_op points to the op that holds the Buffer */
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next_op = op->common.value.arg;
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/* Evaluate/create the address and length operands */
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status = acpi_ds_create_operands(walk_state, next_op);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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obj_desc = acpi_ns_get_attached_object(node);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/* Resolve the operands */
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status =
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acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
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walk_state);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
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acpi_ps_get_opcode_name(op->common.aml_opcode),
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status));
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return_ACPI_STATUS(status);
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}
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/* Initialize the Buffer Field */
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if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
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/* NOTE: Slightly different operands for this opcode */
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status =
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acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
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walk_state->operands[0],
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walk_state->operands[1],
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walk_state->operands[2],
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walk_state->operands[3]);
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} else {
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/* All other, create_xxx_field opcodes */
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status =
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acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
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walk_state->operands[0],
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walk_state->operands[1], NULL,
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walk_state->operands[2]);
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_eval_region_operands
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*
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* PARAMETERS: walk_state - Current walk
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* op - A valid region Op object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get region address and length
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* Called from acpi_ds_exec_end_op during op_region parse tree walk
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*
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******************************************************************************/
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acpi_status
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acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *operand_desc;
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struct acpi_namespace_node *node;
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union acpi_parse_object *next_op;
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acpi_adr_space_type space_id;
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ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
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/*
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* This is where we evaluate the address and length fields of the
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* op_region declaration
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*/
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node = op->common.node;
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/* next_op points to the op that holds the space_ID */
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next_op = op->common.value.arg;
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space_id = (acpi_adr_space_type)next_op->common.value.integer;
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/* next_op points to address op */
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next_op = next_op->common.next;
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/* Evaluate/create the address and length operands */
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status = acpi_ds_create_operands(walk_state, next_op);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Resolve the length and address operands to numbers */
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status =
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acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
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walk_state);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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obj_desc = acpi_ns_get_attached_object(node);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NOT_EXIST);
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}
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/*
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* Get the length operand and save it
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* (at Top of stack)
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*/
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operand_desc = walk_state->operands[walk_state->num_operands - 1];
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obj_desc->region.length = (u32) operand_desc->integer.value;
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acpi_ut_remove_reference(operand_desc);
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/* A zero-length operation region is unusable. Just warn */
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if (!obj_desc->region.length
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&& (space_id < ACPI_NUM_PREDEFINED_REGIONS)) {
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ACPI_WARNING((AE_INFO,
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"Operation Region [%4.4s] has zero length (SpaceId %X)",
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node->name.ascii, space_id));
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}
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/*
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* Get the address and save it
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* (at top of stack - 1)
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*/
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operand_desc = walk_state->operands[walk_state->num_operands - 2];
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obj_desc->region.address = (acpi_physical_address)
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operand_desc->integer.value;
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acpi_ut_remove_reference(operand_desc);
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
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obj_desc,
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ACPI_FORMAT_UINT64(obj_desc->region.address),
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obj_desc->region.length));
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status = acpi_ut_add_address_range(obj_desc->region.space_id,
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obj_desc->region.address,
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obj_desc->region.length, node);
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/* Now the address and length are valid for this opregion */
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obj_desc->region.flags |= AOPOBJ_DATA_VALID;
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_eval_table_region_operands
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*
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* PARAMETERS: walk_state - Current walk
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* op - A valid region Op object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get region address and length.
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* Called from acpi_ds_exec_end_op during data_table_region parse
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* tree walk.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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union acpi_operand_object **operand;
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struct acpi_namespace_node *node;
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union acpi_parse_object *next_op;
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struct acpi_table_header *table;
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u32 table_index;
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ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
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/*
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* This is where we evaluate the Signature string, oem_id string,
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* and oem_table_id string of the Data Table Region declaration
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*/
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node = op->common.node;
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/* next_op points to Signature string op */
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next_op = op->common.value.arg;
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/*
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* Evaluate/create the Signature string, oem_id string,
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* and oem_table_id string operands
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*/
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status = acpi_ds_create_operands(walk_state, next_op);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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operand = &walk_state->operands[0];
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/*
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* Resolve the Signature string, oem_id string,
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* and oem_table_id string operands
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*/
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status =
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acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
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walk_state);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/* Find the ACPI table */
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status = acpi_tb_find_table(operand[0]->string.pointer,
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operand[1]->string.pointer,
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operand[2]->string.pointer, &table_index);
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if (ACPI_FAILURE(status)) {
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if (status == AE_NOT_FOUND) {
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ACPI_ERROR((AE_INFO,
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"ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
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operand[0]->string.pointer,
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operand[1]->string.pointer,
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operand[2]->string.pointer));
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}
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goto cleanup;
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}
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status = acpi_get_table_by_index(table_index, &table);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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obj_desc = acpi_ns_get_attached_object(node);
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if (!obj_desc) {
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status = AE_NOT_EXIST;
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goto cleanup;
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}
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obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
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obj_desc->region.length = table->length;
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obj_desc->region.pointer = table;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
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obj_desc,
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ACPI_FORMAT_UINT64(obj_desc->region.address),
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obj_desc->region.length));
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/* Now the address and length are valid for this opregion */
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obj_desc->region.flags |= AOPOBJ_DATA_VALID;
|
|
|
|
cleanup:
|
|
acpi_ut_remove_reference(operand[0]);
|
|
acpi_ut_remove_reference(operand[1]);
|
|
acpi_ut_remove_reference(operand[2]);
|
|
|
|
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 */
|
|
|
|
/*
|
|
* Set proper index into operand stack for acpi_ds_obj_stack_push
|
|
* invoked inside acpi_ds_create_operand.
|
|
*/
|
|
walk_state->operand_index = walk_state->num_operands;
|
|
|
|
/* Ignore if child is not valid */
|
|
|
|
if (!op->common.value.arg) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Missing child while evaluating opcode %4.4X, Op %p",
|
|
op->common.aml_opcode, op));
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
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_VARIABLE_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_VARIABLE_PACKAGE_OP)
|
|
&& (op->common.parent->common.aml_opcode !=
|
|
AML_NAME_OP))) {
|
|
walk_state->result_obj = obj_desc;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_eval_bank_field_operands
|
|
*
|
|
* PARAMETERS: walk_state - Current walk
|
|
* op - A valid bank_field Op object
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get bank_field bank_value
|
|
* Called from acpi_ds_exec_end_op during bank_field parse tree walk
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_eval_bank_field_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;
|
|
union acpi_parse_object *arg;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
|
|
|
|
/*
|
|
* This is where we evaluate the bank_value field of the
|
|
* bank_field declaration
|
|
*/
|
|
|
|
/* next_op points to the op that holds the Region */
|
|
|
|
next_op = op->common.value.arg;
|
|
|
|
/* next_op points to the op that holds the Bank Register */
|
|
|
|
next_op = next_op->common.next;
|
|
|
|
/* next_op points to the op that holds the Bank Value */
|
|
|
|
next_op = next_op->common.next;
|
|
|
|
/*
|
|
* Set proper index into operand stack for acpi_ds_obj_stack_push
|
|
* invoked inside acpi_ds_create_operand.
|
|
*
|
|
* We use walk_state->Operands[0] to store the evaluated bank_value
|
|
*/
|
|
walk_state->operand_index = 0;
|
|
|
|
status = acpi_ds_create_operand(walk_state, next_op, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
|
|
acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
|
|
/*
|
|
* Get the bank_value operand and save it
|
|
* (at Top of stack)
|
|
*/
|
|
operand_desc = walk_state->operands[0];
|
|
|
|
/* Arg points to the start Bank Field */
|
|
|
|
arg = acpi_ps_get_arg(op, 4);
|
|
while (arg) {
|
|
|
|
/* Ignore OFFSET and ACCESSAS terms here */
|
|
|
|
if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
|
|
node = arg->common.node;
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
return_ACPI_STATUS(AE_NOT_EXIST);
|
|
}
|
|
|
|
obj_desc->bank_field.value =
|
|
(u32) operand_desc->integer.value;
|
|
}
|
|
|
|
/* Move to next field in the list */
|
|
|
|
arg = arg->common.next;
|
|
}
|
|
|
|
acpi_ut_remove_reference(operand_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|