591 lines
16 KiB
C
591 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: dtfield.c - Code generation for individual source fields
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2016, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "aslcompiler.h"
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#include "dtcompiler.h"
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#define _COMPONENT DT_COMPILER
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ACPI_MODULE_NAME ("dtfield")
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/* Local prototypes */
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static void
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DtCompileString (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength);
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static void
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DtCompileUnicode (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength);
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static ACPI_STATUS
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DtCompileUuid (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength);
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static char *
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DtNormalizeBuffer (
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char *Buffer,
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UINT32 *Count);
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/******************************************************************************
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*
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* FUNCTION: DtCompileOneField
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*
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* PARAMETERS: Buffer - Output buffer
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* Field - Field to be compiled
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* ByteLength - Byte length of the field
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* Type - Field type
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*
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* RETURN: None
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*
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* DESCRIPTION: Compile a field value to binary
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*
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*****************************************************************************/
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void
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DtCompileOneField (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength,
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UINT8 Type,
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UINT8 Flags)
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{
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ACPI_STATUS Status;
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switch (Type)
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{
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case DT_FIELD_TYPE_INTEGER:
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DtCompileInteger (Buffer, Field, ByteLength, Flags);
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break;
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case DT_FIELD_TYPE_STRING:
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DtCompileString (Buffer, Field, ByteLength);
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break;
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case DT_FIELD_TYPE_UUID:
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Status = DtCompileUuid (Buffer, Field, ByteLength);
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if (ACPI_SUCCESS (Status))
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{
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break;
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}
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/* Fall through. */
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case DT_FIELD_TYPE_BUFFER:
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DtCompileBuffer (Buffer, Field->Value, Field, ByteLength);
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break;
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case DT_FIELD_TYPE_UNICODE:
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DtCompileUnicode (Buffer, Field, ByteLength);
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break;
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case DT_FIELD_TYPE_DEVICE_PATH:
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break;
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default:
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DtFatal (ASL_MSG_COMPILER_INTERNAL, Field, "Invalid field type");
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break;
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}
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}
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/******************************************************************************
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*
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* FUNCTION: DtCompileString
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*
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* PARAMETERS: Buffer - Output buffer
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* Field - String to be copied to buffer
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* ByteLength - Maximum length of string
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*
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* RETURN: None
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*
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* DESCRIPTION: Copy string to the buffer
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*
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*****************************************************************************/
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static void
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DtCompileString (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength)
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{
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UINT32 Length;
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Length = strlen (Field->Value);
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/* Check if the string is too long for the field */
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if (Length > ByteLength)
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{
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sprintf (MsgBuffer, "Maximum %u characters", ByteLength);
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DtError (ASL_ERROR, ASL_MSG_STRING_LENGTH, Field, MsgBuffer);
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Length = ByteLength;
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}
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memcpy (Buffer, Field->Value, Length);
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}
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/******************************************************************************
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*
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* FUNCTION: DtCompileUnicode
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*
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* PARAMETERS: Buffer - Output buffer
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* Field - String to be copied to buffer
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* ByteLength - Maximum length of string
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*
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* RETURN: None
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*
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* DESCRIPTION: Convert ASCII string to Unicode string
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*
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* Note: The Unicode string is 16 bits per character, no leading signature,
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* with a 16-bit terminating NULL.
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*
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*****************************************************************************/
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static void
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DtCompileUnicode (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength)
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{
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UINT32 Count;
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UINT32 i;
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char *AsciiString;
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UINT16 *UnicodeString;
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AsciiString = Field->Value;
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UnicodeString = (UINT16 *) Buffer;
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Count = strlen (AsciiString) + 1;
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/* Convert to Unicode string (including null terminator) */
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for (i = 0; i < Count; i++)
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{
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UnicodeString[i] = (UINT16) AsciiString[i];
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: DtCompileUuid
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*
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* PARAMETERS: Buffer - Output buffer
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* Field - String to be copied to buffer
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* ByteLength - Maximum length of string
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*
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* RETURN: None
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*
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* DESCRIPTION: Convert UUID string to 16-byte buffer
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*
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******************************************************************************/
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static ACPI_STATUS
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DtCompileUuid (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength)
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{
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char *InString;
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ACPI_STATUS Status;
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InString = Field->Value;
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Status = AuValidateUuid (InString);
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if (ACPI_FAILURE (Status))
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{
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sprintf (MsgBuffer, "%s", Field->Value);
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DtNameError (ASL_ERROR, ASL_MSG_INVALID_UUID, Field, MsgBuffer);
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}
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else
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{
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AcpiUtConvertStringToUuid (InString, Buffer);
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}
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return (Status);
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}
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/******************************************************************************
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*
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* FUNCTION: DtCompileInteger
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*
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* PARAMETERS: Buffer - Output buffer
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* Field - Field obj with Integer to be compiled
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* ByteLength - Byte length of the integer
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* Flags - Additional compile info
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*
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* RETURN: None
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*
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* DESCRIPTION: Compile an integer. Supports integer expressions with C-style
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* operators.
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*
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*****************************************************************************/
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void
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DtCompileInteger (
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UINT8 *Buffer,
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DT_FIELD *Field,
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UINT32 ByteLength,
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UINT8 Flags)
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{
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UINT64 Value;
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UINT64 MaxValue;
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ACPI_STATUS Status;
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/* Output buffer byte length must be in range 1-8 */
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if ((ByteLength > 8) || (ByteLength == 0))
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{
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DtFatal (ASL_MSG_COMPILER_INTERNAL, Field,
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"Invalid internal Byte length");
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return;
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}
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/* Resolve integer expression to a single integer value */
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Status = DtResolveIntegerExpression (Field, &Value);
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if (ACPI_FAILURE (Status))
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{
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return;
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}
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/*
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* Ensure that reserved fields are set properly. Note: uses
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* the DT_NON_ZERO flag to indicate that the reserved value
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* must be exactly one. Otherwise, the value must be zero.
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* This is sufficient for now.
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*/
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/* TBD: Should use a flag rather than compare "Reserved" */
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if (!strcmp (Field->Name, "Reserved"))
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{
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if (Flags & DT_NON_ZERO)
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{
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if (Value != 1)
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{
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DtError (ASL_WARNING, ASL_MSG_RESERVED_VALUE, Field,
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"Must be one, setting to one");
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Value = 1;
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}
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}
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else if (Value != 0)
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{
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DtError (ASL_WARNING, ASL_MSG_RESERVED_VALUE, Field,
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"Must be zero, setting to zero");
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Value = 0;
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}
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}
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/* Check if the value must be non-zero */
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else if ((Flags & DT_NON_ZERO) && (Value == 0))
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{
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DtError (ASL_ERROR, ASL_MSG_ZERO_VALUE, Field, NULL);
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}
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/*
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* Generate the maximum value for the data type (ByteLength)
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* Note: construct chosen for maximum portability
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*/
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MaxValue = ((UINT64) (-1)) >> (64 - (ByteLength * 8));
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/* Validate that the input value is within range of the target */
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if (Value > MaxValue)
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{
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sprintf (MsgBuffer, "%8.8X%8.8X - max %u bytes",
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ACPI_FORMAT_UINT64 (Value), ByteLength);
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DtError (ASL_ERROR, ASL_MSG_INTEGER_SIZE, Field, MsgBuffer);
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}
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memcpy (Buffer, &Value, ByteLength);
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return;
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}
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/******************************************************************************
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*
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* FUNCTION: DtNormalizeBuffer
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*
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* PARAMETERS: Buffer - Input buffer
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* Count - Output the count of hex numbers in
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* the Buffer
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*
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* RETURN: The normalized buffer, must be freed by caller
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*
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* DESCRIPTION: [1A,2B,3C,4D] or 1A, 2B, 3C, 4D will be normalized
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* to 1A 2B 3C 4D
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*
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*****************************************************************************/
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static char *
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DtNormalizeBuffer (
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char *Buffer,
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UINT32 *Count)
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{
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char *NewBuffer;
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char *TmpBuffer;
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UINT32 BufferCount = 0;
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BOOLEAN Separator = TRUE;
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char c;
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NewBuffer = UtLocalCalloc (strlen (Buffer) + 1);
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TmpBuffer = NewBuffer;
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while ((c = *Buffer++))
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{
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switch (c)
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{
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/* Valid separators */
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case '[':
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case ']':
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case ' ':
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case ',':
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Separator = TRUE;
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break;
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default:
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if (Separator)
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{
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/* Insert blank as the standard separator */
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if (NewBuffer[0])
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{
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*TmpBuffer++ = ' ';
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BufferCount++;
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}
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Separator = FALSE;
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}
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*TmpBuffer++ = c;
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break;
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}
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}
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*Count = BufferCount + 1;
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return (NewBuffer);
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}
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/******************************************************************************
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*
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* FUNCTION: DtCompileBuffer
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*
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* PARAMETERS: Buffer - Output buffer
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* StringValue - Integer list to be compiled
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* Field - Current field object
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* ByteLength - Byte length of the integer list
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*
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* RETURN: Count of remaining data in the input list
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*
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* DESCRIPTION: Compile and pack an integer list, for example
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* "AA 1F 20 3B" ==> Buffer[] = {0xAA,0x1F,0x20,0x3B}
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*
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*****************************************************************************/
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UINT32
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DtCompileBuffer (
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UINT8 *Buffer,
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char *StringValue,
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DT_FIELD *Field,
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UINT32 ByteLength)
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{
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char *Substring;
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ACPI_STATUS Status;
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UINT32 Count;
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UINT32 i;
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/* Allow several different types of value separators */
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StringValue = DtNormalizeBuffer (StringValue, &Count);
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Substring = StringValue;
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/* Each element of StringValue is now three chars (2 hex + 1 space) */
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for (i = 0; i < Count; i++, Substring += 3)
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{
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/* Check for byte value too long */
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if (*(&Substring[2]) &&
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(*(&Substring[2]) != ' '))
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{
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DtError (ASL_ERROR, ASL_MSG_BUFFER_ELEMENT, Field, Substring);
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goto Exit;
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}
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/* Convert two ASCII characters to one hex byte */
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Status = AcpiUtAsciiToHexByte (Substring, &Buffer[i]);
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if (ACPI_FAILURE (Status))
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{
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DtError (ASL_ERROR, ASL_MSG_BUFFER_ELEMENT, Field, Substring);
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goto Exit;
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}
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}
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Exit:
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ACPI_FREE (StringValue);
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return (ByteLength - Count);
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}
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/******************************************************************************
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*
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* FUNCTION: DtCompileFlag
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*
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* PARAMETERS: Buffer - Output buffer
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* Field - Field to be compiled
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* Info - Flag info
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*
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* RETURN: None
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*
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* DESCRIPTION: Compile a flag field. Handles flags up to 64 bits.
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*
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*****************************************************************************/
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void
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DtCompileFlag (
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UINT8 *Buffer,
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DT_FIELD *Field,
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ACPI_DMTABLE_INFO *Info)
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{
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UINT64 Value = 0;
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UINT32 BitLength = 1;
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UINT8 BitPosition = 0;
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ACPI_STATUS Status;
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Status = AcpiUtStrtoul64 (Field->Value,
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(ACPI_STRTOUL_64BIT | ACPI_STRTOUL_BASE16), &Value);
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if (ACPI_FAILURE (Status))
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{
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DtError (ASL_ERROR, ASL_MSG_INVALID_HEX_INTEGER, Field, NULL);
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}
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switch (Info->Opcode)
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{
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case ACPI_DMT_FLAG0:
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case ACPI_DMT_FLAG1:
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case ACPI_DMT_FLAG2:
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case ACPI_DMT_FLAG3:
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case ACPI_DMT_FLAG4:
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case ACPI_DMT_FLAG5:
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case ACPI_DMT_FLAG6:
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case ACPI_DMT_FLAG7:
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BitPosition = Info->Opcode;
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BitLength = 1;
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break;
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case ACPI_DMT_FLAGS0:
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BitPosition = 0;
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BitLength = 2;
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break;
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case ACPI_DMT_FLAGS1:
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BitPosition = 1;
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BitLength = 2;
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break;
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case ACPI_DMT_FLAGS2:
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BitPosition = 2;
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BitLength = 2;
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break;
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case ACPI_DMT_FLAGS4:
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BitPosition = 4;
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BitLength = 2;
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break;
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default:
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DtFatal (ASL_MSG_COMPILER_INTERNAL, Field, "Invalid flag opcode");
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break;
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}
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/* Check range of the input flag value */
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if (Value >= ((UINT64) 1 << BitLength))
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{
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sprintf (MsgBuffer, "Maximum %u bit", BitLength);
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DtError (ASL_ERROR, ASL_MSG_FLAG_VALUE, Field, MsgBuffer);
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Value = 0;
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}
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*Buffer |= (UINT8) (Value << BitPosition);
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}
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