mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-22 16:08:07 +01:00
101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
/** @file
|
|
This file defines the EFI RAM Disk Protocol.
|
|
|
|
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
@par Revision Reference:
|
|
This Protocol is introduced in UEFI Specification 2.6
|
|
|
|
**/
|
|
|
|
#ifndef __RAM_DISK_PROTOCOL_H__
|
|
#define __RAM_DISK_PROTOCOL_H__
|
|
|
|
//
|
|
// EFI RAM Disk Protocol GUID value
|
|
//
|
|
#define EFI_RAM_DISK_PROTOCOL_GUID \
|
|
{ 0xab38a0df, 0x6873, 0x44a9, { 0x87, 0xe6, 0xd4, 0xeb, 0x56, 0x14, 0x84, 0x49 }};
|
|
|
|
//
|
|
// Forward reference for pure ANSI compatability
|
|
//
|
|
typedef struct _EFI_RAM_DISK_PROTOCOL EFI_RAM_DISK_PROTOCOL;
|
|
|
|
/**
|
|
Register a RAM disk with specified address, size and type.
|
|
|
|
@param[in] RamDiskBase The base address of registered RAM disk.
|
|
@param[in] RamDiskSize The size of registered RAM disk.
|
|
@param[in] RamDiskType The type of registered RAM disk. The GUID can be
|
|
any of the values defined in section 9.3.6.9, or a
|
|
vendor defined GUID.
|
|
@param[in] ParentDevicePath
|
|
Pointer to the parent device path. If there is no
|
|
parent device path then ParentDevicePath is NULL.
|
|
@param[out] DevicePath On return, points to a pointer to the device path
|
|
of the RAM disk device.
|
|
If ParentDevicePath is not NULL, the returned
|
|
DevicePath is created by appending a RAM disk node
|
|
to the parent device path. If ParentDevicePath is
|
|
NULL, the returned DevicePath is a RAM disk device
|
|
path without appending. This function is
|
|
responsible for allocating the buffer DevicePath
|
|
with the boot service AllocatePool().
|
|
|
|
@retval EFI_SUCCESS The RAM disk is registered successfully.
|
|
@retval EFI_INVALID_PARAMETER DevicePath or RamDiskType is NULL.
|
|
RamDiskSize is 0.
|
|
@retval EFI_ALREADY_STARTED A Device Path Protocol instance to be created
|
|
is already present in the handle database.
|
|
@retval EFI_OUT_OF_RESOURCES The RAM disk register operation fails due to
|
|
resource limitation.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_RAM_DISK_REGISTER_RAMDISK) (
|
|
IN UINT64 RamDiskBase,
|
|
IN UINT64 RamDiskSize,
|
|
IN EFI_GUID *RamDiskType,
|
|
IN EFI_DEVICE_PATH *ParentDevicePath OPTIONAL,
|
|
OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
|
|
);
|
|
|
|
/**
|
|
Unregister a RAM disk specified by DevicePath.
|
|
|
|
@param[in] DevicePath A pointer to the device path that describes a RAM
|
|
Disk device.
|
|
|
|
@retval EFI_SUCCESS The RAM disk is unregistered successfully.
|
|
@retval EFI_INVALID_PARAMETER DevicePath is NULL.
|
|
@retval EFI_UNSUPPORTED The device specified by DevicePath is not a
|
|
valid ramdisk device path and not supported
|
|
by the driver.
|
|
@retval EFI_NOT_FOUND The RAM disk pointed by DevicePath doesn't
|
|
exist.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_RAM_DISK_UNREGISTER_RAMDISK) (
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
|
|
);
|
|
|
|
///
|
|
/// RAM Disk Protocol structure.
|
|
///
|
|
struct _EFI_RAM_DISK_PROTOCOL {
|
|
EFI_RAM_DISK_REGISTER_RAMDISK Register;
|
|
EFI_RAM_DISK_UNREGISTER_RAMDISK Unregister;
|
|
};
|
|
|
|
///
|
|
/// RAM Disk Protocol GUID variable.
|
|
///
|
|
extern EFI_GUID gEfiRamDiskProtocolGuid;
|
|
|
|
#endif
|