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- /** @file
- *
- * Copyright (c) 2017, Linaro, Ltd. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-2-Clause-Patent
- *
- **/
- #include <Uefi.h>
- #include <IndustryStandard/Acpi.h>
- #include <libfdt.h>
- #include <Library/BaseLib.h>
- #include <Library/DebugLib.h>
- #include <Library/DevicePathLib.h>
- #include <Library/HiiLib.h>
- #include <Library/UefiBootServicesTableLib.h>
- #include <Library/UefiBootServicesTableLib.h>
- #include <Library/UefiDriverEntryPoint.h>
- #include <Library/UefiLib.h>
- #include <Library/UefiRuntimeServicesTableLib.h>
- #include <Protocol/AcpiTable.h>
- #include <Protocol/AcpiSystemDescriptionTable.h>
- #include "ConsolePrefDxe.h"
- #define SPCR_SIG EFI_ACPI_2_0_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE
- extern UINT8 ConsolePrefHiiBin[];
- extern UINT8 ConsolePrefDxeStrings[];
- typedef struct {
- VENDOR_DEVICE_PATH VendorDevicePath;
- EFI_DEVICE_PATH_PROTOCOL End;
- } HII_VENDOR_DEVICE_PATH;
- STATIC HII_VENDOR_DEVICE_PATH mConsolePrefDxeVendorDevicePath = {
- {
- {
- HARDWARE_DEVICE_PATH,
- HW_VENDOR_DP,
- {
- (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
- (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
- }
- },
- CONSOLE_PREF_FORMSET_GUID
- },
- {
- END_DEVICE_PATH_TYPE,
- END_ENTIRE_DEVICE_PATH_SUBTYPE,
- {
- (UINT8) (END_DEVICE_PATH_LENGTH),
- (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
- }
- }
- };
- STATIC EFI_EVENT mReadyToBootEvent;
- STATIC
- EFI_STATUS
- InstallHiiPages (
- VOID
- )
- {
- EFI_STATUS Status;
- EFI_HII_HANDLE HiiHandle;
- EFI_HANDLE DriverHandle;
- DriverHandle = NULL;
- Status = gBS->InstallMultipleProtocolInterfaces (&DriverHandle,
- &gEfiDevicePathProtocolGuid,
- &mConsolePrefDxeVendorDevicePath,
- NULL);
- if (EFI_ERROR (Status)) {
- return Status;
- }
- HiiHandle = HiiAddPackages (&gConsolePrefFormSetGuid,
- DriverHandle,
- ConsolePrefDxeStrings,
- ConsolePrefHiiBin,
- NULL);
- if (HiiHandle == NULL) {
- gBS->UninstallMultipleProtocolInterfaces (DriverHandle,
- &gEfiDevicePathProtocolGuid,
- &mConsolePrefDxeVendorDevicePath,
- NULL);
- return EFI_OUT_OF_RESOURCES;
- }
- return EFI_SUCCESS;
- }
- STATIC
- VOID
- RemoveDtStdoutPath (
- VOID
- )
- {
- VOID *Dtb;
- INT32 Node;
- INT32 Error;
- EFI_STATUS Status;
- Status = EfiGetSystemConfigurationTable (&gFdtTableGuid, &Dtb);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_INFO, "%a: could not retrieve DT blob - %r\n", __FUNCTION__,
- Status));
- return;
- }
- Node = fdt_path_offset (Dtb, "/chosen");
- if (Node < 0) {
- return;
- }
- Error = fdt_delprop (Dtb, Node, "stdout-path");
- if (Error) {
- DEBUG ((DEBUG_INFO, "%a: Failed to delete 'stdout-path' property: %a\n",
- __FUNCTION__, fdt_strerror (Error)));
- }
- }
- STATIC
- VOID
- RemoveSpcrTable (
- VOID
- )
- {
- EFI_ACPI_SDT_PROTOCOL *Sdt;
- EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
- EFI_STATUS Status;
- UINTN TableIndex;
- EFI_ACPI_SDT_HEADER *TableHeader;
- EFI_ACPI_TABLE_VERSION TableVersion;
- UINTN TableKey;
- Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL,
- (VOID **)&AcpiTable);
- if (EFI_ERROR (Status)) {
- return;
- }
- Status = gBS->LocateProtocol (&gEfiAcpiSdtProtocolGuid, NULL, (VOID **)&Sdt);
- if (EFI_ERROR (Status)) {
- return;
- }
- TableIndex = 0;
- TableKey = 0;
- TableHeader = NULL;
- do {
- Status = Sdt->GetAcpiTable (TableIndex++, &TableHeader, &TableVersion,
- &TableKey);
- if (EFI_ERROR (Status)) {
- break;
- }
- if (TableHeader->Signature != SPCR_SIG) {
- continue;
- }
- Status = AcpiTable->UninstallAcpiTable (AcpiTable, TableKey);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_WARN, "%a: failed to uninstall SPCR table - %r\n",
- __FUNCTION__, Status));
- }
- break;
- } while (TRUE);
- }
- STATIC
- VOID
- OnReadyToBoot (
- IN EFI_EVENT Event,
- IN VOID *Context
- )
- {
- CONSOLE_PREF_VARSTORE_DATA ConsolePref;
- UINTN BufferSize;
- EFI_STATUS Status;
- VOID *Gop;
- BufferSize = sizeof (ConsolePref);
- Status = gRT->GetVariable (CONSOLE_PREF_VARIABLE_NAME,
- &gConsolePrefFormSetGuid, NULL, &BufferSize, &ConsolePref);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR,
- "%a: variable '%s' could not be read - bailing!\n", __FUNCTION__,
- CONSOLE_PREF_VARIABLE_NAME));
- return;
- }
- if (ConsolePref.Console == CONSOLE_PREF_SERIAL) {
- DEBUG ((DEBUG_INFO,
- "%a: serial console preferred - doing nothing\n", __FUNCTION__));
- return;
- }
- //
- // Check if any GOP instances exist: if so, disable stdout-path and SPCR
- //
- Status = gBS->LocateProtocol (&gEfiGraphicsOutputProtocolGuid, NULL, &Gop);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_INFO,
- "%a: no GOP instances found - doing nothing (%r)\n", __FUNCTION__,
- Status));
- return;
- }
- RemoveDtStdoutPath ();
- RemoveSpcrTable ();
- }
- /**
- The entry point for ConsolePrefDxe driver.
- @param[in] ImageHandle The image handle of the driver.
- @param[in] SystemTable The system table.
- @retval EFI_ALREADY_STARTED The driver already exists in system.
- @retval EFI_OUT_OF_RESOURCES Fail to execute entry point due to lack of
- resources.
- @retval EFI_SUCCES All the related protocols are installed on
- the driver.
- **/
- EFI_STATUS
- EFIAPI
- ConsolePrefDxeEntryPoint (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
- {
- EFI_STATUS Status;
- CONSOLE_PREF_VARSTORE_DATA ConsolePref;
- UINTN BufferSize;
- //
- // Get the current console preference from the ConsolePref variable.
- //
- BufferSize = sizeof (ConsolePref);
- Status = gRT->GetVariable (CONSOLE_PREF_VARIABLE_NAME,
- &gConsolePrefFormSetGuid, NULL, &BufferSize, &ConsolePref);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_INFO,
- "%a: no console preference found, defaulting to graphical\n",
- __FUNCTION__));
- ConsolePref.Console = CONSOLE_PREF_GRAPHICAL;
- }
- if (!EFI_ERROR (Status) &&
- ConsolePref.Console != CONSOLE_PREF_GRAPHICAL &&
- ConsolePref.Console != CONSOLE_PREF_SERIAL) {
- DEBUG ((DEBUG_WARN, "%a: invalid value for %s, defaulting to graphical\n",
- __FUNCTION__, CONSOLE_PREF_VARIABLE_NAME));
- ConsolePref.Console = CONSOLE_PREF_GRAPHICAL;
- Status = EFI_INVALID_PARAMETER; // trigger setvar below
- }
- //
- // Write the newly selected value back to the variable store.
- //
- if (EFI_ERROR (Status)) {
- ZeroMem (&ConsolePref.Reserved, sizeof (ConsolePref.Reserved));
- Status = gRT->SetVariable (CONSOLE_PREF_VARIABLE_NAME,
- &gConsolePrefFormSetGuid,
- EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
- sizeof (ConsolePref), &ConsolePref);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "%a: gRT->SetVariable () failed - %r\n",
- __FUNCTION__, Status));
- return Status;
- }
- }
- Status = gBS->CreateEventEx (EVT_NOTIFY_SIGNAL, TPL_CALLBACK,
- OnReadyToBoot, NULL, &gEfiEventReadyToBootGuid,
- &mReadyToBootEvent);
- ASSERT_EFI_ERROR (Status);
- return InstallHiiPages ();
- }
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