/*++

Copyright (c) 2024, the LibreXP developers.
Provided under the BSD 3-Clause license.

Module Name:

   efiapi.h

Abstract:

   Provides EFI API definitions.

--*/

#ifndef _EFIAPI_H
#define _EFIAPI_H

#define EFI_SPECIFICATION_MAJOR_REVISION 1
#define EFI_SPECIFICATION_MINOR_REVISION 02
#define EFI_SPECIFICATION_VERSION ((EFI_SPECIFICATION_MAJOR_REVISION << 16) || EFI_SPECIFICATION_MINOR_REVISION)

INTERFACE_DECL(_EFI_SYSTEM_TABLE);

/*
 * Loaded image protocol definitions.
 */

typedef
EFI_STATUS
(EFIAPI *EFI_IMAGE_UNLOAD) (
    IN EFI_HANDLE ImageHandle
    );

#define EFI_LOADED_IMAGE_PROTOCOL_GUID \
    { 0x5b1b31a1, 0x9562, 0x11d2, { 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b } }
#define LOADED_IMAGE_PROTOCOL EFI_LOADED_IMAGE_PROTOCOL_GUID

#define EFI_IMAGE_INFORMATION_REVISION 0x1000

typedef struct {
    UINT32 Revision;
    EFI_HANDLE ParentHandle;
    struct _EFI_SYSTEM_TABLE *SystemTable;

    EFI_HANDLE DeviceHandle;
    EFI_DEVICE_PATH *FilePath;
    VOID *Reserved;

    UINT32 LoadOptionsSize;
    VOID *LoadOptions;

    VOID *ImageBase;
    UINT64 ImageSize;
    EFI_MEMORY_TYPE ImageCodeType;
    EFI_MEMORY_TYPE ImageDataType;

    EFI_IMAGE_UNLOAD Unload;
} EFI_LOADED_IMAGE;

/*
 * EFI table header.
 */

typedef struct _EFI_TABLE_HEADER {
    UINT64 Signature;
    UINT32 Revision;
    UINT32 HeaderSize;
    UINT32 CRC32;
    UINT32 Reserved;
} EFI_TABLE_HEADER;

/*
 * EFI runtime services table definitions.
 */

#define EFI_RUNTIME_SERVICES_SIGNATURE 0x56524553544e5552
#define EFI_RUNTIME_SERVICES_REVISION  EFI_SPECIFICATION_VERSION

typedef struct {
    EFI_TABLE_HEADER Hdr;

    EFI_HANDLE GetTime;
    EFI_HANDLE SetTime;
    EFI_HANDLE GetWakeupTime;
    EFI_HANDLE SetWakeupTime;

    EFI_HANDLE SetVirtualAddressMap;
    EFI_HANDLE ConvertPointer;

    EFI_HANDLE GetVariable;
    EFI_HANDLE GetNextVariableName;
    EFI_HANDLE SetVariable;

    EFI_HANDLE GetNextHighMonotonicCount;
    EFI_HANDLE ResetSystem;

    EFI_HANDLE UpdateCapsule;
    EFI_HANDLE QueryCapsuleCapabilities;
    EFI_HANDLE QueryVariableInfo;
} EFI_RUNTIME_SERVICES;

/*
 * EFI boot services table definitions.
 */

#define EFI_BOOT_SERVICES_SIGNATURE 0x56524553544f4f42
#define EFI_BOOT_SERVICES_REVISION  EFI_SPECIFICATION_VERSION

typedef
EFI_STATUS
(EFIAPI *EFI_HANDLE_PROTOCOL) (
    IN EFI_HANDLE Handle,
    IN EFI_GUID *Protocol,
    OUT VOID **Interface
    );

typedef struct _EFI_BOOT_SERVICES {
    EFI_TABLE_HEADER Hdr;

    EFI_HANDLE RaiseTPL;
    EFI_HANDLE RestoreTPL;

    EFI_HANDLE AllocatePages;
    EFI_HANDLE FreePages;
    EFI_HANDLE GetMemoryMap;
    EFI_HANDLE AllocatePool;
    EFI_HANDLE FreePool;

    EFI_HANDLE CreateEvent;
    EFI_HANDLE SetTimer;
    EFI_HANDLE WaitForEvent;
    EFI_HANDLE SignalEvent;
    EFI_HANDLE CloseEvent;
    EFI_HANDLE CheckEvent;

    EFI_HANDLE InstallProtocolInterface;
    EFI_HANDLE ReinstallProtocolInterface;
    EFI_HANDLE UninstallProtocolInterface;
    EFI_HANDLE_PROTOCOL HandleProtocol;
    EFI_HANDLE AlternateHandleProtocol;
    EFI_HANDLE RegisterProtocolNotify;
    EFI_HANDLE LocateHandle;
    EFI_HANDLE LocateDevicePath;
    EFI_HANDLE InstallConfigurationTable;

    EFI_HANDLE LoadImage;
    EFI_HANDLE StartImage;
    EFI_HANDLE Exit;
    EFI_HANDLE UnloadImage;
    EFI_HANDLE ExitBootServices;

    EFI_HANDLE GetNextHighMonotonicCount;
    EFI_HANDLE Stall;
    EFI_HANDLE SetWatchdogTimer;

    EFI_HANDLE ConnectController;
    EFI_HANDLE DisconnectController;

    EFI_HANDLE OpenProtocol;
    EFI_HANDLE CloseProtocol;
    EFI_HANDLE OpenProtocolInformation;

    EFI_HANDLE ProtocolsPerHandle;
    EFI_HANDLE LocateHandleBuffer;
    EFI_HANDLE LocateProtocol;
    EFI_HANDLE InstallMultipleProtocolInterfaces;
    EFI_HANDLE UninstallMultipleProtocolInterfaces;

    EFI_HANDLE CalculateCrc32;

    EFI_HANDLE CopyMem;
    EFI_HANDLE SetMem;
    EFI_HANDLE CreateEventEx;
} EFI_BOOT_SERVICES;

/*
 * EFI configuration table definitions.
 */

#define MPS_TABLE_GUID \
    { 0xeb9d2d2f, 0x2d88, 0x11d3, { 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } }

#define ACPI_TABLE_GUID \
    { 0x8868e871, 0xe4f1, 0x11d3, { 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } }

#define ACPI_20_TABLE_GUID \
    { 0x8868e871, 0xe4f1, 0x11d3, { 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } }

#define SMBIOS_TABLE_GUID \
    { 0xeb9d2d31, 0x2d88, 0x11d3, { 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } }

#define SMBIOS3_TABLE_GUID \
    { 0xf2fd1544, 0x9794, 0x4a2c, { 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94 } }

#define SAL_SYSTEM_TABLE_GUID \
    { 0xeb9d2d32, 0x2d88, 0x11d3, { 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } }

#define EFI_DTB_TABLE_GUID \
    { 0xb1b621d5, 0xf19c, 0x41a5, { 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0 } }

typedef struct _EFI_CONFIGURATION_TABLE {
    EFI_GUID VendorGuid;
    VOID *VendorTable;
} EFI_CONFIGURATION_TABLE;

/*
 * EFI system table definitions.
 */

#define EFI_SYSTEM_TABLE_SIGNATURE 0x5453595320494249
#define EFI_SYSTEM_TABLE_REVISION  EFI_SPECIFICATION_VERSION

typedef struct _EFI_SYSTEM_TABLE {
    EFI_TABLE_HEADER Hdr;

    CHAR16 *FirmwareVendor;
    UINT32 FirmwareRevision;

    EFI_HANDLE ConsoleInHandle;
    SIMPLE_INPUT_INTERFACE *ConIn;

    EFI_HANDLE ConsoleOutHandle;
    SIMPLE_TEXT_OUTPUT_INTERFACE *ConOut;

    EFI_HANDLE StandardErrorHandle;
    SIMPLE_TEXT_OUTPUT_INTERFACE *StdErr;

    EFI_RUNTIME_SERVICES *RuntimeServices;
    EFI_BOOT_SERVICES *BootServices;

    UINTN NumberOfTableEntries;
    EFI_CONFIGURATION_TABLE *ConfigurationTable;
} EFI_SYSTEM_TABLE;

#endif