//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Desc:      ACPI, Hardware detection related                               //
//                                                                            //
//                                                                            //
//  Copyright © 2018-2020 The OS/K Team                                       //
//                                                                            //
//  This file is part of OS/K.                                                //
//                                                                            //
//  OS/K 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, either version 3 of the License, or         //
//  any later version.                                                        //
//                                                                            //
//  OS/K 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 OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
//----------------------------------------------------------------------------//

#ifndef _KERNEL_H
#include <kernel.h>
#endif

#ifndef _IO_ACPI_H
#define _IO_ACPI_H

//----------------------------------------------------------------------------//

//
// ACPI 1.0 descriptor
//
struct RSDPLegacy {
    char signature[8];
    uchar checksum;
    char OEMID[6];
    uchar revision;
    uint rsdtAddress;
} __attribute__ ((packed));

//
// ACPI 2.0 descriptor
//
struct RSDPDescriptor {
    // RSDT ACPI 1.0 and above
    struct RSDPLegacy legacy;

    // RSDT ACPI 2.0
    uint length;
    ulong xsdtAddress;
    uchar extendedChecksum;
    uchar reserved[3];
} __attribute__ ((packed));

//
// ACPI System Description Table
//
struct SDTHeader {
  char signature[4];
  uint length;
  uchar revision;
  uchar checksum;
  char OEMID[6];
  char OEMTableID[8];
  uint OEMRevision;
  uint creatorID;
  uint creatorRevision;
  uint sdtTablePtr;
};

//
// ACPI table types id
//
enum {
    SDT_MADT,
    SDT_BERT,
    SDT_CPEP,
    SDT_DSDT,
    SDT_ECDT,
    SDT_EINJ,
    SDT_ERST,
    SDT_FADT,
    SDT_FACS,
    SDT_HEST,
    SDT_MSCT,
    SDT_MPST,
    SDT_OEMx,
    SDT_PMTT,
    SDT_PSDT,
    SDT_RASF,
    SDT_RSDT,
    SDT_SBST,
    SDT_SLIT,
    SDT_SRAT,
    SDT_SSDT,
    SDT_XSDT,
    SDT_HEPT
};

#define N_SDT_TYPES 23



//----------------------------------------------------------------------------//

void IoInitAcpi(void);

SDTHeader *IoGetAcpiTable(ulong id);

//----------------------------------------------------------------------------//

#endif