/* $Id: acpi.h 108029 2025-02-03 15:58:01Z vboxsync $ */
/** @file
 * IPRT - Internal RTAcpi header.
 */

/*
 * Copyright (C) 2025 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, in version 3 of the
 * License.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <https://www.gnu.org/licenses>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */

#ifndef IPRT_INCLUDED_INTERNAL_acpi_h
#define IPRT_INCLUDED_INTERNAL_acpi_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif

#include <iprt/acpi.h>
#include <iprt/list.h>

RT_C_DECLS_BEGIN

/** Pointer to an ACPI AST node. */
typedef struct RTACPIASTNODE *PRTACPIASTNODE;
/** Pointer to a const ACPI AST node. */
typedef const struct RTACPIASTNODE *PCRTACPIASTNODE;

/**
 * AST node argument type.
 */
typedef enum RTACPIASTARGTYPE
{
    kAcpiAstArgType_Invalid = 0,
    kAcpiAstArgType_AstNode,
    kAcpiAstArgType_NameString,
    kAcpiAstArgType_U8,
    kAcpiAstArgType_U16,
    kAcpiAstArgType_U32,
    kAcpiAstArgType_U64,
    kAcpiAstArgType_32Bit_Hack = 0x7fffffff
} RTACPIASTARGTYPE;


/**
 * An AST node argument
 */
typedef struct RTACPIASTARG
{
    /** Argument type. */
    RTACPIASTARGTYPE    enmType;
    /** Type dependent data. */
    union
    {
        uintptr_t       uPtrInternal;
        PCRTACPIASTNODE pAstNode;
        const char      *pszNameString;
        uint8_t         u8;
        uint16_t        u16;
        uint32_t        u32;
        uint64_t        u64;
    } u;
} RTACPIASTARG;
/** Pointer to an AST node argument. */
typedef RTACPIASTARG *PRTACPIASTARG;
/** Pointer to a const AST node argument. */
typedef const RTACPIASTARG *PCRTACPIASTARG;


/**
 * The core ACPI AST node.
 */
typedef struct RTACPIASTNODE
{
    /** List node. */
    RTLISTNODE          NdAst;
    /** The AML opcode defining the node. */
    uint8_t             bOpc;
    /** Number of "arguments" for the opcode following (for example Scope(), Method(), If(), etc., i.e. anything requiring () after the keyword ). */
    uint8_t             cArgs;
    /** Padding */
    uint8_t             abRsvd[2];
    /** Some additional flags. */
    uint32_t            fFlags;
    /** List of other AST nodes for the opened scope if indicated by the AST flags (RTACPIASTNODE). */
    RTLISTANCHOR        LstScopeNodes;
    /** The AST node arguments - variable in size. */
    RTACPIASTARG        aArgs[1];
} RTACPIASTNODE;

/** Default flags. */
#define RTACPI_AST_NODE_F_DEFAULT       0
/** The AST node opens a new scope. */
#define RTACPI_AST_NODE_F_NEW_SCOPE     RT_BIT_32(0)
/** The AST node opcode is part of the extended prefix opcode map. */
#define RTACPI_AST_NODE_F_EXT_OPC       RT_BIT_32(1)


/**
 * Allocates a new ACPI AST node initialized with the given properties.
 *
 * @returns Pointer to the new ACPI AST node or NULL if out of memory.
 * @param   bOpc                The opcode value for the AST node.
 * @param   fFlags              Flags for this node.
 * @param   cArgs               Number of arguments to allocate.
 */
DECLHIDDEN(PRTACPIASTNODE) rtAcpiAstNodeAlloc(uint8_t bOpc, uint32_t fFlags, uint8_t cArgs);


/**
 * Frees the given AST node and all children nodes linked to this one.
 *
 * @param   pAstNd              The AST node to free.
 */
DECLHIDDEN(void) rtAcpiAstNodeFree(PRTACPIASTNODE pAstNd);


/**
 * Dumps the given AST node and everything it references to the given ACPI table.
 *
 * @returns IPRT status code.
 * @param   pAstNd              The AST node to dump.
 * @param   hAcpiTbl            The ACPI table to dump to.
 */
DECLHIDDEN(int) rtAcpiAstDumpToTbl(PCRTACPIASTNODE pAstNd, RTACPITBL hAcpiTbl);


/**
 * Worker for decompiling AML bytecode to the ASL source language.
 *
 * @returns IPRT status code.
 * @param   hVfsIosOut          The VFS I/O stream handle to output the result to.
 * @param   hVfsIosIn           The VFS I/O stream handle to read the ACPI table from.
 * @param   pErrInfo            Where to return additional error information.
 */
DECLHIDDEN(int) rtAcpiTblConvertFromAmlToAsl(RTVFSIOSTREAM hVfsIosOut, RTVFSIOSTREAM hVfsIosIn, PRTERRINFO pErrInfo);


/**
 * Worker for compiling ASL to the AML bytecode.
 *
 * @returns IPRT status code.
 * @param   hVfsIosOut          The VFS I/O stream handle to output the result to.
 * @param   hVfsIosIn           The VFS I/O stream handle to read the ACPI table from.
 * @param   pErrInfo            Where to return additional error information.
 */
DECLHIDDEN(int) rtAcpiTblConvertFromAslToAml(RTVFSIOSTREAM hVfsIosOut, RTVFSIOSTREAM hVfsIosIn, PRTERRINFO pErrInfo);


RT_C_DECLS_END

#endif /* !IPRT_INCLUDED_INTERNAL_acpi_h */