code.delx.au - refind/blob - gptsync/os_efi.c

   1 /*
   2  * gptsync/os_efi.c
   3  * EFI glue for gptsync
   4  *
   5  * Copyright (c) 2006 Christoph Pfisterer
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  *  * Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  *  * Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  *  * Neither the name of Christoph Pfisterer nor the names of the
  21  *    contributors may be used to endorse or promote products derived
  22  *    from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #include "gptsync.h"
  38 #include "refit_call_wrapper.h"
  39 #ifdef __MAKEWITH_TIANO
  40 //#include "tiano_includes.h"
  41 #include "AutoGen.h"
  42 #endif
  43
  44 // variables
  45
  46 EFI_BLOCK_IO    *BlockIO = NULL;
  47
  48 //
  49 // sector I/O functions
  50 //
  51
  52 // Returns size of disk in blocks
  53 UINT64 disk_size(VOID) {
  54    return (UINT64) (BlockIO->Media->LastBlock + 1);
  55 } // UINT64 disk_size()
  56
  57 UINTN read_sector(UINT64 lba, UINT8 *buffer)
  58 {
  59     EFI_STATUS          Status;
  60
  61     Status = refit_call5_wrapper(BlockIO->ReadBlocks, BlockIO, BlockIO->Media->MediaId, lba, 512, buffer);
  62     if (EFI_ERROR(Status)) {
  63         // TODO: report error
  64         return 1;
  65     }
  66     return 0;
  67 }
  68
  69 UINTN write_sector(UINT64 lba, UINT8 *buffer)
  70 {
  71     EFI_STATUS          Status;
  72
  73     Status = refit_call5_wrapper(BlockIO->WriteBlocks, BlockIO, BlockIO->Media->MediaId, lba, 512, buffer);
  74     if (EFI_ERROR(Status)) {
  75         // TODO: report error
  76         return 1;
  77     }
  78     return 0;
  79 }
  80
  81 //
  82 // Keyboard input
  83 //
  84
  85 static BOOLEAN ReadAllKeyStrokes(VOID)
  86 {
  87     EFI_STATUS          Status;
  88     BOOLEAN             GotKeyStrokes;
  89     EFI_INPUT_KEY       Key;
  90
  91     GotKeyStrokes = FALSE;
  92     for (;;) {
  93         Status = refit_call2_wrapper(ST->ConIn->ReadKeyStroke, ST->ConIn, &Key);
  94         if (Status == EFI_SUCCESS) {
  95             GotKeyStrokes = TRUE;
  96             continue;
  97         }
  98         break;
  99     }
 100     return GotKeyStrokes;
 101 }
 102
 103 static VOID PauseForKey(VOID)
 104 {
 105     UINTN               Index;
 106
 107     Print(L"\n* Hit any key to continue *");
 108
 109     if (ReadAllKeyStrokes()) {  // remove buffered key strokes
 110         refit_call1_wrapper(BS->Stall, 5000000);     // 5 seconds delay
 111         ReadAllKeyStrokes();    // empty the buffer again
 112     }
 113
 114     refit_call3_wrapper(BS->WaitForEvent, 1, &ST->ConIn->WaitForKey, &Index);
 115     ReadAllKeyStrokes();        // empty the buffer to protect the menu
 116
 117     Print(L"\n");
 118 }
 119
 120 UINTN input_boolean(CHARN *prompt, BOOLEAN *bool_out)
 121 {
 122     EFI_STATUS          Status;
 123     UINTN               Index;
 124     EFI_INPUT_KEY       Key;
 125
 126     Print(prompt);
 127
 128     ReadAllKeyStrokes(); // Remove buffered key strokes
 129     do {
 130         refit_call3_wrapper(BS->WaitForEvent, 1, &ST->ConIn->WaitForKey, &Index);
 131         Status = refit_call2_wrapper(ST->ConIn->ReadKeyStroke, ST->ConIn, &Key);
 132         if (EFI_ERROR(Status) && Status != EFI_NOT_READY)
 133             return 1;
 134     } while (Status == EFI_NOT_READY);
 135
 136     if (Key.UnicodeChar == 'y' || Key.UnicodeChar == 'Y') {
 137         Print(L"Yes\n");
 138         *bool_out = TRUE;
 139     } else {
 140         Print(L"No\n");
 141         *bool_out = FALSE;
 142     }
 143
 144     ReadAllKeyStrokes();
 145     return 0;
 146 }
 147
 148 #ifdef __MAKEWITH_TIANO
 149
 150 // EFI_GUID gEfiDxeServicesTableGuid = { 0x05AD34BA, 0x6F02, 0x4214, { 0x95, 0x2E, 0x4D, 0xA0, 0x39, 0x8E, 0x2B, 0xB9 }};
 151
 152 // Minimal initialization function
 153 static VOID InitializeLib(IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable) {
 154    gST            = SystemTable;
 155    //    gImageHandle   = ImageHandle;
 156    gBS            = SystemTable->BootServices;
 157    //    gRS            = SystemTable->RuntimeServices;
 158    gRT = SystemTable->RuntimeServices; // Some BDS functions need gRT to be set
 159
 160 //   InitializeConsoleSim();
 161 }
 162
 163 // EFI_GUID gEfiBlockIoProtocolGuid = { 0x964E5B21, 0x6459, 0x11D2, { 0x8E, 0x39, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B }};
 164
 165 #define LibLocateHandle gBS->LocateHandleBuffer
 166 #define BlockIoProtocol gEfiBlockIoProtocolGuid
 167
 168 #endif
 169
 170 // Performs a case-insensitive string comparison. This function is necesary
 171 // because some EFIs have buggy StriCmp() functions that actually perform
 172 // case-sensitive comparisons.
 173 // Returns TRUE if strings are identical, FALSE otherwise.
 174 static BOOLEAN MyStriCmp(IN CHAR16 *FirstString, IN CHAR16 *SecondString) {
 175     if (FirstString && SecondString) {
 176         while ((*FirstString != L'\0') && ((*FirstString & ~0x20) == (*SecondString & ~0x20))) {
 177                 FirstString++;
 178                 SecondString++;
 179         }
 180         return (*FirstString == *SecondString);
 181     } else {
 182         return FALSE;
 183     }
 184 } // BOOLEAN MyStriCmp()
 185
 186 // Check firmware vendor; get verification to continue if it's not Apple.
 187 // Returns TRUE if Apple firmware or if user assents to use, FALSE otherwise.
 188 static BOOLEAN VerifyGoOn(VOID) {
 189    BOOLEAN GoOn = TRUE;
 190    UINTN invalid;
 191
 192    if (!MyStriCmp(L"Apple", ST->FirmwareVendor)) {
 193       Print(L"Your firmware is made by %s.\n", ST->FirmwareVendor);
 194       Print(L"Ordinarily, a hybrid MBR (which this program creates) should be used ONLY on\n");
 195       Print(L"Apple Macs that dual-boot with Windows or some other BIOS-mode OS. Are you\n");
 196       invalid = input_boolean(STR("SURE you want to continue? [y/N] "), &GoOn);
 197       if (invalid)
 198          GoOn = FALSE;
 199    }
 200    return GoOn;
 201 } // BOOLEAN VerifyGoOn()
 202
 203 //
 204 // main entry point
 205 //
 206
 207 EFI_STATUS
 208 EFIAPI
 209 efi_main    (IN EFI_HANDLE           ImageHandle,
 210              IN EFI_SYSTEM_TABLE     *SystemTable)
 211 {
 212     EFI_STATUS          Status;
 213     UINTN               SyncStatus;
 214     UINTN               Index;
 215     UINTN               HandleCount;
 216     EFI_HANDLE          *HandleBuffer;
 217     EFI_HANDLE          DeviceHandle;
 218     EFI_DEVICE_PATH     *DevicePath, *NextDevicePath;
 219     BOOLEAN             Usable;
 220
 221     InitializeLib(ImageHandle, SystemTable);
 222
 223     Status = refit_call5_wrapper(BS->LocateHandleBuffer, ByProtocol, &BlockIoProtocol, NULL, &HandleCount, &HandleBuffer);
 224     if (EFI_ERROR (Status)) {
 225         Status = EFI_NOT_FOUND;
 226         return Status;
 227     }
 228
 229     if (!VerifyGoOn())
 230        return EFI_ABORTED;
 231
 232     for (Index = 0; Index < HandleCount; Index++) {
 233
 234         DeviceHandle = HandleBuffer[Index];
 235
 236         // check device path
 237         DevicePath = DevicePathFromHandle(DeviceHandle);
 238         Usable = TRUE;
 239         while (DevicePath != NULL && !IsDevicePathEndType(DevicePath)) {
 240             NextDevicePath = NextDevicePathNode(DevicePath);
 241
 242             if (DevicePathType(DevicePath) == MESSAGING_DEVICE_PATH &&
 243                 (DevicePathSubType(DevicePath) == MSG_USB_DP ||
 244                  DevicePathSubType(DevicePath) == MSG_USB_CLASS_DP ||
 245                  DevicePathSubType(DevicePath) == MSG_1394_DP ||
 246                  DevicePathSubType(DevicePath) == MSG_FIBRECHANNEL_DP))
 247                 Usable = FALSE;         // USB/FireWire/FC device
 248             if (DevicePathType(DevicePath) == MEDIA_DEVICE_PATH)
 249                 Usable = FALSE;         // partition, El Torito entry, legacy BIOS device
 250
 251             DevicePath = NextDevicePath;
 252         }
 253         if (!Usable)
 254             continue;
 255
 256         Status = refit_call3_wrapper(BS->HandleProtocol, DeviceHandle, &BlockIoProtocol, (VOID **) &BlockIO);
 257         if (EFI_ERROR(Status)) {
 258             // TODO: report error
 259             BlockIO = NULL;
 260         } else {
 261             if (BlockIO->Media->BlockSize != 512)
 262                 BlockIO = NULL;    // optical media
 263             else
 264                 break;
 265         }
 266
 267     }
 268
 269     FreePool (HandleBuffer);
 270
 271     if (BlockIO == NULL) {
 272         Print(L"Internal hard disk device not found!\n");
 273         return EFI_NOT_FOUND;
 274     }
 275
 276     SyncStatus = gptsync();
 277
 278     if (SyncStatus == 0)
 279         PauseForKey();
 280
 281
 282     if (SyncStatus)
 283         return EFI_NOT_FOUND;
 284     return EFI_SUCCESS;
 285 }