acpica/executer/exutils.c

db2bae30SDana Myers/******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * Module Name: exutils - interpreter/scanner utilities
db2bae30SDana Myers *
db2bae30SDana Myers *****************************************************************************/
db2bae30SDana Myers
26f3cdf0SGordon Ross/*
*385cc6b4SJerry Jelinek * Copyright (C) 2000 - 2016, Intel Corp.
db2bae30SDana Myers * All rights reserved.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Redistribution and use in source and binary forms, with or without
26f3cdf0SGordon Ross * modification, are permitted provided that the following conditions
26f3cdf0SGordon Ross * are met:
26f3cdf0SGordon Ross * 1. Redistributions of source code must retain the above copyright
26f3cdf0SGordon Ross *    notice, this list of conditions, and the following disclaimer,
26f3cdf0SGordon Ross *    without modification.
26f3cdf0SGordon Ross * 2. Redistributions in binary form must reproduce at minimum a disclaimer
26f3cdf0SGordon Ross *    substantially similar to the "NO WARRANTY" disclaimer below
26f3cdf0SGordon Ross *    ("Disclaimer") and any redistribution must be conditioned upon
26f3cdf0SGordon Ross *    including a substantially similar Disclaimer requirement for further
26f3cdf0SGordon Ross *    binary redistribution.
26f3cdf0SGordon Ross * 3. Neither the names of the above-listed copyright holders nor the names
26f3cdf0SGordon Ross *    of any contributors may be used to endorse or promote products derived
26f3cdf0SGordon Ross *    from this software without specific prior written permission.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Alternatively, this software may be distributed under the terms of the
26f3cdf0SGordon Ross * GNU General Public License ("GPL") version 2 as published by the Free
26f3cdf0SGordon Ross * Software Foundation.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * NO WARRANTY
26f3cdf0SGordon Ross * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26f3cdf0SGordon Ross * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26f3cdf0SGordon Ross * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26f3cdf0SGordon Ross * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26f3cdf0SGordon Ross * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26f3cdf0SGordon Ross * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26f3cdf0SGordon Ross * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26f3cdf0SGordon Ross * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26f3cdf0SGordon Ross * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26f3cdf0SGordon Ross * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26f3cdf0SGordon Ross * POSSIBILITY OF SUCH DAMAGES.
26f3cdf0SGordon Ross */
db2bae30SDana Myers
db2bae30SDana Myers/*
db2bae30SDana Myers * DEFINE_AML_GLOBALS is tested in amlcode.h
db2bae30SDana Myers * to determine whether certain global names should be "defined" or only
db2bae30SDana Myers * "declared" in the current compilation. This enhances maintainability
db2bae30SDana Myers * by enabling a single header file to embody all knowledge of the names
db2bae30SDana Myers * in question.
db2bae30SDana Myers *
db2bae30SDana Myers * Exactly one module of any executable should #define DEFINE_GLOBALS
db2bae30SDana Myers * before #including the header files which use this convention. The
db2bae30SDana Myers * names in question will be defined and initialized in that module,
db2bae30SDana Myers * and declared as extern in all other modules which #include those
db2bae30SDana Myers * header files.
db2bae30SDana Myers */
db2bae30SDana Myers
db2bae30SDana Myers#define DEFINE_AML_GLOBALS
db2bae30SDana Myers
db2bae30SDana Myers#include "acpi.h"
aa2aa9a6SDana Myers#include "accommon.h"
db2bae30SDana Myers#include "acinterp.h"
db2bae30SDana Myers#include "amlcode.h"
db2bae30SDana Myers
db2bae30SDana Myers#define _COMPONENT          ACPI_EXECUTER
db2bae30SDana Myers        ACPI_MODULE_NAME    ("exutils")
db2bae30SDana Myers
db2bae30SDana Myers/* Local prototypes */
db2bae30SDana Myers
db2bae30SDana Myersstatic UINT32
db2bae30SDana MyersAcpiExDigitsNeeded (
26f3cdf0SGordon Ross    UINT64                  Value,
db2bae30SDana Myers    UINT32                  Base);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers#ifndef ACPI_NO_METHOD_EXECUTION
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExEnterInterpreter
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  None
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      None
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Enter the interpreter execution region. Failure to enter
db2bae30SDana Myers *              the interpreter region is a fatal system error. Used in
db2bae30SDana Myers *              conjunction with ExitInterpreter.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
db2bae30SDana MyersAcpiExEnterInterpreter (
db2bae30SDana Myers    void)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExEnterInterpreter);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        ACPI_ERROR ((AE_INFO, "Could not acquire AML Interpreter mutex"));
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_VOID;
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExExitInterpreter
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  None
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      None
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Exit the interpreter execution region. This is the top level
db2bae30SDana Myers *              routine used to exit the interpreter when all processing has
*385cc6b4SJerry Jelinek *              been completed, or when the method blocks.
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * Cases where the interpreter is unlocked internally:
*385cc6b4SJerry Jelinek *      1) Method will be blocked on a Sleep() AML opcode
*385cc6b4SJerry Jelinek *      2) Method will be blocked on an Acquire() AML opcode
*385cc6b4SJerry Jelinek *      3) Method will be blocked on a Wait() AML opcode
*385cc6b4SJerry Jelinek *      4) Method will be blocked to acquire the global lock
*385cc6b4SJerry Jelinek *      5) Method will be blocked waiting to execute a serialized control
*385cc6b4SJerry Jelinek *          method that is currently executing
*385cc6b4SJerry Jelinek *      6) About to invoke a user-installed opregion handler
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
db2bae30SDana MyersAcpiExExitInterpreter (
db2bae30SDana Myers    void)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExExitInterpreter);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        ACPI_ERROR ((AE_INFO, "Could not release AML Interpreter mutex"));
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_VOID;
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExTruncateFor32bitTable
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  ObjDesc         - Object to be truncated
db2bae30SDana Myers *
*385cc6b4SJerry Jelinek * RETURN:      TRUE if a truncation was performed, FALSE otherwise.
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is
db2bae30SDana Myers *              32-bit, as determined by the revision of the DSDT.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
*385cc6b4SJerry JelinekBOOLEAN
db2bae30SDana MyersAcpiExTruncateFor32bitTable (
db2bae30SDana Myers    ACPI_OPERAND_OBJECT     *ObjDesc)
db2bae30SDana Myers{
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_ENTRY ();
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Object must be a valid number and we must be executing
*385cc6b4SJerry Jelinek     * a control method. Object could be NS node for AML_INT_NAMEPATH_OP.
db2bae30SDana Myers     */
db2bae30SDana Myers    if ((!ObjDesc) ||
db2bae30SDana Myers        (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) != ACPI_DESC_TYPE_OPERAND) ||
aa2aa9a6SDana Myers        (ObjDesc->Common.Type != ACPI_TYPE_INTEGER))
db2bae30SDana Myers    {
*385cc6b4SJerry Jelinek        return (FALSE);
db2bae30SDana Myers    }
db2bae30SDana Myers
*385cc6b4SJerry Jelinek    if ((AcpiGbl_IntegerByteWidth == 4) &&
*385cc6b4SJerry Jelinek        (ObjDesc->Integer.Value > (UINT64) ACPI_UINT32_MAX))
db2bae30SDana Myers    {
db2bae30SDana Myers        /*
*385cc6b4SJerry Jelinek         * We are executing in a 32-bit ACPI table. Truncate
*385cc6b4SJerry Jelinek         * the value to 32 bits by zeroing out the upper 32-bit field
db2bae30SDana Myers         */
26f3cdf0SGordon Ross        ObjDesc->Integer.Value &= (UINT64) ACPI_UINT32_MAX;
*385cc6b4SJerry Jelinek        return (TRUE);
db2bae30SDana Myers    }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    return (FALSE);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExAcquireGlobalLock
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  FieldFlags            - Flags with Lock rule:
db2bae30SDana Myers *                                      AlwaysLock or NeverLock
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      None
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field
db2bae30SDana Myers *              flags specifiy that it is to be obtained before field access.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
db2bae30SDana MyersAcpiExAcquireGlobalLock (
db2bae30SDana Myers    UINT32                  FieldFlags)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExAcquireGlobalLock);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Only use the lock if the AlwaysLock bit is set */
db2bae30SDana Myers
db2bae30SDana Myers    if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK))
db2bae30SDana Myers    {
db2bae30SDana Myers        return_VOID;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Attempt to get the global lock, wait forever */
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiExAcquireMutexObject (ACPI_WAIT_FOREVER,
db2bae30SDana Myers        AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
db2bae30SDana Myers
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        ACPI_EXCEPTION ((AE_INFO, Status,
db2bae30SDana Myers            "Could not acquire Global Lock"));
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_VOID;
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExReleaseGlobalLock
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  FieldFlags            - Flags with Lock rule:
db2bae30SDana Myers *                                      AlwaysLock or NeverLock
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      None
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Release the ACPI hardware Global Lock
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
db2bae30SDana MyersAcpiExReleaseGlobalLock (
db2bae30SDana Myers    UINT32                  FieldFlags)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExReleaseGlobalLock);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Only use the lock if the AlwaysLock bit is set */
db2bae30SDana Myers
db2bae30SDana Myers    if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK))
db2bae30SDana Myers    {
db2bae30SDana Myers        return_VOID;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /* Release the global lock */
db2bae30SDana Myers
db2bae30SDana Myers    Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Report the error, but there isn't much else we can do */
db2bae30SDana Myers
db2bae30SDana Myers        ACPI_EXCEPTION ((AE_INFO, Status,
db2bae30SDana Myers            "Could not release Global Lock"));
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_VOID;
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExDigitsNeeded
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  Value           - Value to be represented
db2bae30SDana Myers *              Base            - Base of representation
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      The number of digits.
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Calculate the number of digits needed to represent the Value
db2bae30SDana Myers *              in the given Base (Radix)
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersstatic UINT32
db2bae30SDana MyersAcpiExDigitsNeeded (
26f3cdf0SGordon Ross    UINT64                  Value,
db2bae30SDana Myers    UINT32                  Base)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT32                  NumDigits;
26f3cdf0SGordon Ross    UINT64                  CurrentValue;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExDigitsNeeded);
db2bae30SDana Myers
db2bae30SDana Myers
26f3cdf0SGordon Ross    /* UINT64 is unsigned, so we don't worry about a '-' prefix */
db2bae30SDana Myers
db2bae30SDana Myers    if (Value == 0)
db2bae30SDana Myers    {
db2bae30SDana Myers        return_UINT32 (1);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    CurrentValue = Value;
db2bae30SDana Myers    NumDigits = 0;
db2bae30SDana Myers
db2bae30SDana Myers    /* Count the digits in the requested base */
db2bae30SDana Myers
db2bae30SDana Myers    while (CurrentValue)
db2bae30SDana Myers    {
db2bae30SDana Myers        (void) AcpiUtShortDivide (CurrentValue, Base, &CurrentValue, NULL);
db2bae30SDana Myers        NumDigits++;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    return_UINT32 (NumDigits);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExEisaIdToString
db2bae30SDana Myers *
*385cc6b4SJerry Jelinek * PARAMETERS:  OutString       - Where to put the converted string (8 bytes)
*385cc6b4SJerry Jelinek *              CompressedId    - EISAID to be converted
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      None
db2bae30SDana Myers *
57190917SDana Myers * DESCRIPTION: Convert a numeric EISAID to string representation. Return
57190917SDana Myers *              buffer must be large enough to hold the string. The string
57190917SDana Myers *              returned is always exactly of length ACPI_EISAID_STRING_SIZE
57190917SDana Myers *              (includes null terminator). The EISAID is always 32 bits.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
db2bae30SDana MyersAcpiExEisaIdToString (
57190917SDana Myers    char                    *OutString,
26f3cdf0SGordon Ross    UINT64                  CompressedId)
db2bae30SDana Myers{
57190917SDana Myers    UINT32                  SwappedId;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_ENTRY ();
db2bae30SDana Myers
db2bae30SDana Myers
57190917SDana Myers    /* The EISAID should be a 32-bit integer */
57190917SDana Myers
57190917SDana Myers    if (CompressedId > ACPI_UINT32_MAX)
57190917SDana Myers    {
57190917SDana Myers        ACPI_WARNING ((AE_INFO,
*385cc6b4SJerry Jelinek            "Expected EISAID is larger than 32 bits: "
*385cc6b4SJerry Jelinek            "0x%8.8X%8.8X, truncating",
57190917SDana Myers            ACPI_FORMAT_UINT64 (CompressedId)));
57190917SDana Myers    }
57190917SDana Myers
db2bae30SDana Myers    /* Swap ID to big-endian to get contiguous bits */
db2bae30SDana Myers
57190917SDana Myers    SwappedId = AcpiUtDwordByteSwap ((UINT32) CompressedId);
db2bae30SDana Myers
57190917SDana Myers    /* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */
57190917SDana Myers
57190917SDana Myers    OutString[0] = (char) (0x40 + (((unsigned long) SwappedId >> 26) & 0x1F));
57190917SDana Myers    OutString[1] = (char) (0x40 + ((SwappedId >> 21) & 0x1F));
57190917SDana Myers    OutString[2] = (char) (0x40 + ((SwappedId >> 16) & 0x1F));
26f3cdf0SGordon Ross    OutString[3] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 12);
26f3cdf0SGordon Ross    OutString[4] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 8);
26f3cdf0SGordon Ross    OutString[5] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 4);
26f3cdf0SGordon Ross    OutString[6] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 0);
db2bae30SDana Myers    OutString[7] = 0;
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
57190917SDana Myers * FUNCTION:    AcpiExIntegerToString
db2bae30SDana Myers *
57190917SDana Myers * PARAMETERS:  OutString       - Where to put the converted string. At least
57190917SDana Myers *                                21 bytes are needed to hold the largest
57190917SDana Myers *                                possible 64-bit integer.
57190917SDana Myers *              Value           - Value to be converted
db2bae30SDana Myers *
*385cc6b4SJerry Jelinek * RETURN:      Converted string in OutString
db2bae30SDana Myers *
57190917SDana Myers * DESCRIPTION: Convert a 64-bit integer to decimal string representation.
57190917SDana Myers *              Assumes string buffer is large enough to hold the string. The
57190917SDana Myers *              largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1).
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersvoid
57190917SDana MyersAcpiExIntegerToString (
57190917SDana Myers    char                    *OutString,
26f3cdf0SGordon Ross    UINT64                  Value)
db2bae30SDana Myers{
db2bae30SDana Myers    UINT32                  Count;
db2bae30SDana Myers    UINT32                  DigitsNeeded;
db2bae30SDana Myers    UINT32                  Remainder;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_ENTRY ();
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    DigitsNeeded = AcpiExDigitsNeeded (Value, 10);
db2bae30SDana Myers    OutString[DigitsNeeded] = 0;
db2bae30SDana Myers
db2bae30SDana Myers    for (Count = DigitsNeeded; Count > 0; Count--)
db2bae30SDana Myers    {
db2bae30SDana Myers        (void) AcpiUtShortDivide (Value, 10, &Value, &Remainder);
db2bae30SDana Myers        OutString[Count-1] = (char) ('0' + Remainder);\
db2bae30SDana Myers    }
db2bae30SDana Myers}
db2bae30SDana Myers
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek/*******************************************************************************
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * FUNCTION:    AcpiExPciClsToString
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * PARAMETERS:  OutString       - Where to put the converted string (7 bytes)
*385cc6b4SJerry Jelinek *              ClassCode       - PCI class code to be converted (3 bytes)
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * RETURN:      Converted string in OutString
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * DESCRIPTION: Convert 3-bytes PCI class code to string representation.
*385cc6b4SJerry Jelinek *              Return buffer must be large enough to hold the string. The
*385cc6b4SJerry Jelinek *              string returned is always exactly of length
*385cc6b4SJerry Jelinek *              ACPI_PCICLS_STRING_SIZE (includes null terminator).
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek ******************************************************************************/
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinekvoid
*385cc6b4SJerry JelinekAcpiExPciClsToString (
*385cc6b4SJerry Jelinek    char                    *OutString,
*385cc6b4SJerry Jelinek    UINT8                   ClassCode[3])
*385cc6b4SJerry Jelinek{
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    ACPI_FUNCTION_ENTRY ();
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    /* All 3 bytes are hexadecimal */
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    OutString[0] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[0], 4);
*385cc6b4SJerry Jelinek    OutString[1] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[0], 0);
*385cc6b4SJerry Jelinek    OutString[2] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[1], 4);
*385cc6b4SJerry Jelinek    OutString[3] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[1], 0);
*385cc6b4SJerry Jelinek    OutString[4] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[2], 4);
*385cc6b4SJerry Jelinek    OutString[5] = AcpiUtHexToAsciiChar ((UINT64) ClassCode[2], 0);
*385cc6b4SJerry Jelinek    OutString[6] = 0;
*385cc6b4SJerry Jelinek}
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek/*******************************************************************************
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * FUNCTION:    AcpiIsValidSpaceId
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * PARAMETERS:  SpaceId             - ID to be validated
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * RETURN:      TRUE if SpaceId is a valid/supported ID.
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek * DESCRIPTION: Validate an operation region SpaceID.
*385cc6b4SJerry Jelinek *
*385cc6b4SJerry Jelinek ******************************************************************************/
*385cc6b4SJerry Jelinek
*385cc6b4SJerry JelinekBOOLEAN
*385cc6b4SJerry JelinekAcpiIsValidSpaceId (
*385cc6b4SJerry Jelinek    UINT8                   SpaceId)
*385cc6b4SJerry Jelinek{
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    if ((SpaceId >= ACPI_NUM_PREDEFINED_REGIONS) &&
*385cc6b4SJerry Jelinek        (SpaceId < ACPI_USER_REGION_BEGIN) &&
*385cc6b4SJerry Jelinek        (SpaceId != ACPI_ADR_SPACE_DATA_TABLE) &&
*385cc6b4SJerry Jelinek        (SpaceId != ACPI_ADR_SPACE_FIXED_HARDWARE))
*385cc6b4SJerry Jelinek    {
*385cc6b4SJerry Jelinek        return (FALSE);
*385cc6b4SJerry Jelinek    }
*385cc6b4SJerry Jelinek
*385cc6b4SJerry Jelinek    return (TRUE);
*385cc6b4SJerry Jelinek}
*385cc6b4SJerry Jelinek
db2bae30SDana Myers#endif