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/*
* gptsync/os_efi.c
* EFI glue for gptsync
*
* Copyright (c) 2006 Christoph Pfisterer
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Christoph Pfisterer nor the names of the
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "gptsync.h"
#include "refit_call_wrapper.h"
// variables
EFI_BLOCK_IO *BlockIO = NULL;
//
// sector I/O functions
//
UINTN read_sector(UINT64 lba, UINT8 *buffer)
{
EFI_STATUS Status;
Status = refit_call5_wrapper(BlockIO->ReadBlocks, BlockIO, BlockIO->Media->MediaId, lba, 512, buffer);
if (EFI_ERROR(Status)) {
// TODO: report error
return 1;
}
return 0;
}
UINTN write_sector(UINT64 lba, UINT8 *buffer)
{
EFI_STATUS Status;
Status = refit_call5_wrapper(BlockIO->WriteBlocks, BlockIO, BlockIO->Media->MediaId, lba, 512, buffer);
if (EFI_ERROR(Status)) {
// TODO: report error
return 1;
}
return 0;
}
//
// Keyboard input
//
static BOOLEAN ReadAllKeyStrokes(VOID)
{
EFI_STATUS Status;
BOOLEAN GotKeyStrokes;
EFI_INPUT_KEY Key;
GotKeyStrokes = FALSE;
for (;;) {
Status = refit_call2_wrapper(ST->ConIn->ReadKeyStroke, ST->ConIn, &Key);
if (Status == EFI_SUCCESS) {
GotKeyStrokes = TRUE;
continue;
}
break;
}
return GotKeyStrokes;
}
static VOID PauseForKey(VOID)
{
UINTN Index;
Print(L"\n* Hit any key to continue *");
if (ReadAllKeyStrokes()) { // remove buffered key strokes
refit_call1_wrapper(BS->Stall, 5000000); // 5 seconds delay
ReadAllKeyStrokes(); // empty the buffer again
}
refit_call3_wrapper(BS->WaitForEvent, 1, &ST->ConIn->WaitForKey, &Index);
ReadAllKeyStrokes(); // empty the buffer to protect the menu
Print(L"\n");
}
UINTN input_boolean(CHARN *prompt, BOOLEAN *bool_out)
{
EFI_STATUS Status;
UINTN Index;
EFI_INPUT_KEY Key;
Print(prompt);
if (ReadAllKeyStrokes()) { // remove buffered key strokes
refit_call1_wrapper(BS->Stall, 500000); // 0.5 seconds delay
ReadAllKeyStrokes(); // empty the buffer again
}
refit_call3_wrapper(BS->WaitForEvent, 1, &ST->ConIn->WaitForKey, &Index);
Status = refit_call2_wrapper(ST->ConIn->ReadKeyStroke, ST->ConIn, &Key);
if (EFI_ERROR(Status))
return 1;
if (Key.UnicodeChar == 'y' || Key.UnicodeChar == 'Y') {
Print(L"Yes\n");
*bool_out = TRUE;
} else {
Print(L"No\n");
*bool_out = FALSE;
}
ReadAllKeyStrokes();
return 0;
}
//
// main entry point
//
EFI_STATUS
EFIAPI
efi_main (IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable)
{
EFI_STATUS Status;
UINTN SyncStatus;
UINTN Index;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
EFI_HANDLE DeviceHandle;
EFI_DEVICE_PATH *DevicePath, *NextDevicePath;
BOOLEAN Usable;
EFI_LOADED_IMAGE *info;
CHAR16 *args;
CHAR16 *argp;
InitializeLib(ImageHandle, SystemTable);
// check arguments
// For now there's only one, if we need more arguments,
// something more complicated will be (badly) needed
Status = refit_call3_wrapper(BS->HandleProtocol, ImageHandle, &LoadedImageProtocol, (VOID **)&info);
if (EFI_ERROR(Status)) {
Print(L"LoadedImageProtocol not supported");
return EFI_LOAD_ERROR;
}
args = AllocateZeroPool(info->LoadOptionsSize + sizeof(CHAR16));
if (args == NULL) {
Print(L"Allocation failed for arguments");
return EFI_OUT_OF_RESOURCES;
}
CopyMem(args, info->LoadOptions, info->LoadOptionsSize);
argp = args;
// skip image name
while ((*argp != L' ') && (*argp != CHAR_NULL))
argp++;
// skip spaces
while ((*argp == L' ') && (*argp != CHAR_NULL))
argp++;
if (StrnCmp(L"-t", argp, 2) == 0) {
truncate_2tb = TRUE;
}
FreePool(args);
Status = LibLocateHandle(ByProtocol, &BlockIoProtocol, NULL,
&HandleCount, &HandleBuffer);
if (EFI_ERROR (Status)) {
Status = EFI_NOT_FOUND;
return Status;
}
for (Index = 0; Index < HandleCount; Index++) {
DeviceHandle = HandleBuffer[Index];
// check device path
DevicePath = DevicePathFromHandle(DeviceHandle);
Usable = TRUE;
while (DevicePath != NULL && !IsDevicePathEndType(DevicePath)) {
NextDevicePath = NextDevicePathNode(DevicePath);
if (DevicePathType(DevicePath) == MESSAGING_DEVICE_PATH &&
(DevicePathSubType(DevicePath) == MSG_USB_DP ||
DevicePathSubType(DevicePath) == MSG_USB_CLASS_DP ||
DevicePathSubType(DevicePath) == MSG_1394_DP ||
DevicePathSubType(DevicePath) == MSG_FIBRECHANNEL_DP))
Usable = FALSE; // USB/FireWire/FC device
if (DevicePathType(DevicePath) == MEDIA_DEVICE_PATH)
Usable = FALSE; // partition, El Torito entry, legacy BIOS device
DevicePath = NextDevicePath;
}
if (!Usable)
continue;
Status = refit_call3_wrapper(BS->HandleProtocol, DeviceHandle, &BlockIoProtocol, (VOID **) &BlockIO);
if (EFI_ERROR(Status)) {
// TODO: report error
BlockIO = NULL;
} else {
if (BlockIO->Media->BlockSize != 512)
BlockIO = NULL; // optical media
else
break;
}
}
FreePool (HandleBuffer);
if (BlockIO == NULL) {
Print(L"Internal hard disk device not found!\n");
return EFI_NOT_FOUND;
}
SyncStatus = gptsync();
if (SyncStatus == 0)
PauseForKey();
if (SyncStatus)
return EFI_NOT_FOUND;
return EFI_SUCCESS;
}
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