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/** @file
Copyright (c) 2023-2024, Mario Bălănică <mariobalanica02@gmail.com>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
#include <Library/HiiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include "MemoryAttributeManagerDxe.h"
extern UINT8 MemoryAttributeManagerDxeHiiBin[];
extern UINT8 MemoryAttributeManagerDxeStrings[];
typedef struct {
VENDOR_DEVICE_PATH VendorDevicePath;
EFI_DEVICE_PATH_PROTOCOL End;
} HII_VENDOR_DEVICE_PATH;
STATIC HII_VENDOR_DEVICE_PATH mVendorDevicePath = {
{
{
HARDWARE_DEVICE_PATH,
HW_VENDOR_DP,
{
(UINT8)(sizeof (VENDOR_DEVICE_PATH)),
(UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)
}
},
MEMORY_ATTRIBUTE_MANAGER_FORMSET_GUID
},
{
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
{
(UINT8)(END_DEVICE_PATH_LENGTH),
(UINT8)((END_DEVICE_PATH_LENGTH) >> 8)
}
}
};
/**
Installs HII page for user configuration.
@retval EFI_SUCCESS The operation completed successfully.
**/
STATIC
EFI_STATUS
EFIAPI
InstallHiiPages (
VOID
)
{
EFI_STATUS Status;
EFI_HII_HANDLE HiiHandle;
EFI_HANDLE DriverHandle;
DriverHandle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&DriverHandle,
&gEfiDevicePathProtocolGuid,
&mVendorDevicePath,
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
HiiHandle = HiiAddPackages (
&gMemoryAttributeManagerFormSetGuid,
DriverHandle,
MemoryAttributeManagerDxeStrings,
MemoryAttributeManagerDxeHiiBin,
NULL
);
if (HiiHandle == NULL) {
gBS->UninstallMultipleProtocolInterfaces (
DriverHandle,
&gEfiDevicePathProtocolGuid,
&mVendorDevicePath,
NULL
);
return EFI_OUT_OF_RESOURCES;
}
return EFI_SUCCESS;
}
/**
This function uninstalls the EFI_MEMORY_ATTRIBUTE_PROTOCOL
from CpuDxe's handle.
**/
STATIC
VOID
UninstallEfiMemoryAttributeProtocol (
VOID
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
UINTN Size;
VOID *MemoryAttributeProtocol;
Size = sizeof (Handle);
Status = gBS->LocateHandle (
ByProtocol,
&gEfiMemoryAttributeProtocolGuid,
NULL,
&Size,
&Handle
);
if (EFI_ERROR (Status)) {
ASSERT (Status == EFI_NOT_FOUND);
return;
}
Status = gBS->HandleProtocol (
Handle,
&gEfiMemoryAttributeProtocolGuid,
&MemoryAttributeProtocol
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return;
}
Status = gBS->UninstallProtocolInterface (
Handle,
&gEfiMemoryAttributeProtocolGuid,
MemoryAttributeProtocol
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return;
}
DEBUG ((
DEBUG_INFO,
"EFI Memory Attribute Protocol disabled due to user/platform preference!\n"
));
}
/**
The entry point for MemoryAttributeManagerDxe driver.
@param[in] ImageHandle The image handle of the driver.
@param[in] SystemTable The system table.
@retval EFI_SUCCESS The operation completed successfully.
**/
EFI_STATUS
EFIAPI
MemoryAttributeManagerInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
UINTN Size;
MEMORY_ATTRIBUTE_MANAGER_VARSTORE_DATA Config;
Config.Enabled = PROTOCOL_ENABLED_DEFAULT;
Size = sizeof (MEMORY_ATTRIBUTE_MANAGER_VARSTORE_DATA);
Status = gRT->GetVariable (
MEMORY_ATTRIBUTE_MANAGER_DATA_VAR_NAME,
&gMemoryAttributeManagerFormSetGuid,
NULL,
&Size,
&Config
);
if (EFI_ERROR (Status)) {
Status = gRT->SetVariable (
MEMORY_ATTRIBUTE_MANAGER_DATA_VAR_NAME,
&gMemoryAttributeManagerFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
Size,
&Config
);
ASSERT_EFI_ERROR (Status);
}
if (!Config.Enabled) {
UninstallEfiMemoryAttributeProtocol ();
}
return InstallHiiPages ();
}
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