]>
Commit | Line | Data |
---|---|---|
1 | /** @file\r | |
2 | Basic command line parser for EBL (Embedded Boot Loader)\r | |
3 | \r | |
4 | Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r | |
5 | Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
6 | (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r | |
7 | \r | |
8 | This program and the accompanying materials\r | |
9 | are licensed and made available under the terms and conditions of the BSD License\r | |
10 | which accompanies this distribution. The full text of the license may be found at\r | |
11 | http://opensource.org/licenses/bsd-license.php\r | |
12 | \r | |
13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
15 | \r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #include "Ebl.h"\r | |
20 | \r | |
21 | // Globals for command history processing\r | |
22 | INTN mCmdHistoryEnd = -1;\r | |
23 | INTN mCmdHistoryStart = -1;\r | |
24 | INTN mCmdHistoryCurrent = -1;\r | |
25 | CHAR8 mCmdHistory[MAX_CMD_HISTORY][MAX_CMD_LINE];\r | |
26 | CHAR8 *mCmdBlank = "";\r | |
27 | \r | |
28 | // Globals to remember current screen geometry\r | |
29 | UINTN gScreenColumns;\r | |
30 | UINTN gScreenRows;\r | |
31 | \r | |
32 | // Global to turn on/off breaking commands with prompts before they scroll the screen\r | |
33 | BOOLEAN gPageBreak = TRUE;\r | |
34 | \r | |
35 | VOID\r | |
36 | RingBufferIncrement (\r | |
37 | IN INTN *Value\r | |
38 | )\r | |
39 | {\r | |
40 | *Value = *Value + 1;\r | |
41 | \r | |
42 | if (*Value >= MAX_CMD_HISTORY) {\r | |
43 | *Value = 0;\r | |
44 | }\r | |
45 | }\r | |
46 | \r | |
47 | VOID\r | |
48 | RingBufferDecrement (\r | |
49 | IN INTN *Value\r | |
50 | )\r | |
51 | {\r | |
52 | *Value = *Value - 1;\r | |
53 | \r | |
54 | if (*Value < 0) {\r | |
55 | *Value = MAX_CMD_HISTORY - 1;\r | |
56 | }\r | |
57 | }\r | |
58 | \r | |
59 | /**\r | |
60 | Save this command in the circular history buffer. Older commands are\r | |
61 | overwritten with newer commands.\r | |
62 | \r | |
63 | @param Cmd Command line to archive the history of.\r | |
64 | \r | |
65 | @return None\r | |
66 | \r | |
67 | **/\r | |
68 | VOID\r | |
69 | SetCmdHistory (\r | |
70 | IN CHAR8 *Cmd\r | |
71 | )\r | |
72 | {\r | |
73 | // Don't bother adding empty commands to the list\r | |
74 | if (AsciiStrLen(Cmd) != 0) {\r | |
75 | \r | |
76 | // First entry\r | |
77 | if (mCmdHistoryStart == -1) {\r | |
78 | mCmdHistoryStart = 0;\r | |
79 | mCmdHistoryEnd = 0;\r | |
80 | } else {\r | |
81 | // Record the new command at the next index\r | |
82 | RingBufferIncrement(&mCmdHistoryStart);\r | |
83 | \r | |
84 | // If the next index runs into the end index, shuffle end back by one\r | |
85 | if (mCmdHistoryStart == mCmdHistoryEnd) {\r | |
86 | RingBufferIncrement(&mCmdHistoryEnd);\r | |
87 | }\r | |
88 | }\r | |
89 | \r | |
90 | // Copy the new command line into the ring buffer\r | |
91 | AsciiStrnCpyS (&mCmdHistory[mCmdHistoryStart][0], MAX_CMD_LINE, Cmd, MAX_CMD_LINE);\r | |
92 | }\r | |
93 | \r | |
94 | // Reset the command history for the next up arrow press\r | |
95 | mCmdHistoryCurrent = mCmdHistoryStart;\r | |
96 | }\r | |
97 | \r | |
98 | \r | |
99 | /**\r | |
100 | Retreave data from the Command History buffer. Direction maps into up arrow\r | |
101 | an down arrow on the command line\r | |
102 | \r | |
103 | @param Direction Command forward or back\r | |
104 | \r | |
105 | @return The Command history based on the Direction\r | |
106 | \r | |
107 | **/\r | |
108 | CHAR8 *\r | |
109 | GetCmdHistory (\r | |
110 | IN UINT16 Direction\r | |
111 | )\r | |
112 | {\r | |
113 | CHAR8 *HistoricalCommand = NULL;\r | |
114 | \r | |
115 | // No history yet?\r | |
116 | if (mCmdHistoryCurrent == -1) {\r | |
117 | HistoricalCommand = mCmdBlank;\r | |
118 | goto Exit;\r | |
119 | }\r | |
120 | \r | |
121 | if (Direction == SCAN_UP) {\r | |
122 | HistoricalCommand = &mCmdHistory[mCmdHistoryCurrent][0];\r | |
123 | \r | |
124 | // if we just echoed the last command, hang out there, don't wrap around\r | |
125 | if (mCmdHistoryCurrent == mCmdHistoryEnd) {\r | |
126 | goto Exit;\r | |
127 | }\r | |
128 | \r | |
129 | // otherwise, back up by one\r | |
130 | RingBufferDecrement(&mCmdHistoryCurrent);\r | |
131 | \r | |
132 | } else if (Direction == SCAN_DOWN) {\r | |
133 | \r | |
134 | // if we last echoed the start command, put a blank prompt out\r | |
135 | if (mCmdHistoryCurrent == mCmdHistoryStart) {\r | |
136 | HistoricalCommand = mCmdBlank;\r | |
137 | goto Exit;\r | |
138 | }\r | |
139 | \r | |
140 | // otherwise increment the current pointer and return that command\r | |
141 | RingBufferIncrement(&mCmdHistoryCurrent);\r | |
142 | RingBufferIncrement(&mCmdHistoryCurrent);\r | |
143 | \r | |
144 | HistoricalCommand = &mCmdHistory[mCmdHistoryCurrent][0];\r | |
145 | RingBufferDecrement(&mCmdHistoryCurrent);\r | |
146 | }\r | |
147 | \r | |
148 | Exit:\r | |
149 | return HistoricalCommand;\r | |
150 | }\r | |
151 | \r | |
152 | \r | |
153 | /**\r | |
154 | Parse the CmdLine and break it up into Argc (arg count) and Argv (array of\r | |
155 | pointers to each argument). The Cmd buffer is altered and separators are\r | |
156 | converted to string terminators. This allows Argv to point into CmdLine.\r | |
157 | A CmdLine can support multiple commands. The next command in the command line\r | |
158 | is returned if it exists.\r | |
159 | \r | |
160 | @param CmdLine String to parse for a set of commands\r | |
161 | @param Argc Returns the number of arguments in the CmdLine current command\r | |
162 | @param Argv Argc pointers to each string in CmdLine\r | |
163 | \r | |
164 | @return Next Command in the command line or NULL if non exists\r | |
165 | **/\r | |
166 | CHAR8 *\r | |
167 | ParseArguments (\r | |
168 | IN CHAR8 *CmdLine,\r | |
169 | OUT UINTN *Argc,\r | |
170 | OUT CHAR8 **Argv\r | |
171 | )\r | |
172 | {\r | |
173 | UINTN Arg;\r | |
174 | CHAR8 *Char;\r | |
175 | BOOLEAN LookingForArg;\r | |
176 | BOOLEAN InQuote;\r | |
177 | \r | |
178 | *Argc = 0;\r | |
179 | if (AsciiStrLen (CmdLine) == 0) {\r | |
180 | return NULL;\r | |
181 | }\r | |
182 | \r | |
183 | // Walk a single command line. A CMD_SEPARATOR allows multiple commands on a single line\r | |
184 | InQuote = FALSE;\r | |
185 | LookingForArg = TRUE;\r | |
186 | for (Char = CmdLine, Arg = 0; *Char != '\0'; Char++) {\r | |
187 | if (!InQuote && *Char == CMD_SEPARATOR) {\r | |
188 | break;\r | |
189 | }\r | |
190 | \r | |
191 | // Perform any text conversion here\r | |
192 | if (*Char == '\t') {\r | |
193 | // TAB to space\r | |
194 | *Char = ' ';\r | |
195 | }\r | |
196 | \r | |
197 | if (LookingForArg) {\r | |
198 | // Look for the beginning of an Argv[] entry\r | |
199 | if (*Char == '"') {\r | |
200 | Argv[Arg++] = ++Char;\r | |
201 | LookingForArg = FALSE;\r | |
202 | InQuote = TRUE;\r | |
203 | } else if (*Char != ' ') {\r | |
204 | Argv[Arg++] = Char;\r | |
205 | LookingForArg = FALSE;\r | |
206 | }\r | |
207 | } else {\r | |
208 | // Looking for the terminator of an Argv[] entry\r | |
209 | if (!InQuote && (*Char == ' ')) {\r | |
210 | *Char = '\0';\r | |
211 | LookingForArg = TRUE;\r | |
212 | } else if (!InQuote && (*Char == '"') && (*(Char-1) != '\\')) {\r | |
213 | InQuote = TRUE;\r | |
214 | } else if (InQuote && (*Char == '"') && (*(Char-1) != '\\')) {\r | |
215 | *Char = '\0';\r | |
216 | InQuote = FALSE;\r | |
217 | }\r | |
218 | }\r | |
219 | }\r | |
220 | \r | |
221 | *Argc = Arg;\r | |
222 | \r | |
223 | if (*Char == CMD_SEPARATOR) {\r | |
224 | // Replace the command delimiter with null and return pointer to next command line\r | |
225 | *Char = '\0';\r | |
226 | return ++Char;\r | |
227 | }\r | |
228 | \r | |
229 | return NULL;\r | |
230 | }\r | |
231 | \r | |
232 | \r | |
233 | /**\r | |
234 | Return a keypress or optionally timeout if a timeout value was passed in.\r | |
235 | An optional callback function is called every second when waiting for a\r | |
236 | timeout.\r | |
237 | \r | |
238 | @param Key EFI Key information returned\r | |
239 | @param TimeoutInSec Number of seconds to wait to timeout\r | |
240 | @param CallBack Callback called every second during the timeout wait\r | |
241 | \r | |
242 | @return EFI_SUCCESS Key was returned\r | |
243 | @return EFI_TIMEOUT If the TimoutInSec expired\r | |
244 | \r | |
245 | **/\r | |
246 | EFI_STATUS\r | |
247 | EFIAPI\r | |
248 | EblGetCharKey (\r | |
249 | IN OUT EFI_INPUT_KEY *Key,\r | |
250 | IN UINTN TimeoutInSec,\r | |
251 | IN EBL_GET_CHAR_CALL_BACK CallBack OPTIONAL\r | |
252 | )\r | |
253 | {\r | |
254 | EFI_STATUS Status;\r | |
255 | UINTN WaitCount;\r | |
256 | UINTN WaitIndex;\r | |
257 | EFI_EVENT WaitList[2];\r | |
258 | \r | |
259 | WaitCount = 1;\r | |
260 | WaitList[0] = gST->ConIn->WaitForKey;\r | |
261 | if (TimeoutInSec != 0) {\r | |
262 | // Create a time event for 1 sec duration if we have a timeout\r | |
263 | gBS->CreateEvent (EVT_TIMER, 0, NULL, NULL, &WaitList[1]);\r | |
264 | gBS->SetTimer (WaitList[1], TimerPeriodic, EFI_SET_TIMER_TO_SECOND);\r | |
265 | WaitCount++;\r | |
266 | }\r | |
267 | \r | |
268 | for (;;) {\r | |
269 | Status = gBS->WaitForEvent (WaitCount, WaitList, &WaitIndex);\r | |
270 | ASSERT_EFI_ERROR (Status);\r | |
271 | \r | |
272 | switch (WaitIndex) {\r | |
273 | case 0:\r | |
274 | // Key event signaled\r | |
275 | Status = gST->ConIn->ReadKeyStroke (gST->ConIn, Key);\r | |
276 | if (!EFI_ERROR (Status)) {\r | |
277 | if (WaitCount == 2) {\r | |
278 | gBS->CloseEvent (WaitList[1]);\r | |
279 | }\r | |
280 | return EFI_SUCCESS;\r | |
281 | }\r | |
282 | break;\r | |
283 | \r | |
284 | case 1:\r | |
285 | // Periodic 1 sec timer signaled\r | |
286 | TimeoutInSec--;\r | |
287 | if (CallBack != NULL) {\r | |
288 | // Call the users callback function if registered\r | |
289 | CallBack (TimeoutInSec);\r | |
290 | }\r | |
291 | if (TimeoutInSec == 0) {\r | |
292 | gBS->CloseEvent (WaitList[1]);\r | |
293 | return EFI_TIMEOUT;\r | |
294 | }\r | |
295 | break;\r | |
296 | default:\r | |
297 | ASSERT (FALSE);\r | |
298 | }\r | |
299 | }\r | |
300 | }\r | |
301 | \r | |
302 | \r | |
303 | /**\r | |
304 | This routine is used prevent command output data from scrolling off the end\r | |
305 | of the screen. The global gPageBreak is used to turn on or off this feature.\r | |
306 | If the CurrentRow is near the end of the screen pause and print out a prompt\r | |
307 | If the use hits Q to quit return TRUE else for any other key return FALSE.\r | |
308 | PrefixNewline is used to figure out if a newline is needed before the prompt\r | |
309 | string. This depends on the last print done before calling this function.\r | |
310 | CurrentRow is updated by one on a call or set back to zero if a prompt is\r | |
311 | needed.\r | |
312 | \r | |
313 | @param CurrentRow Used to figure out if its the end of the page and updated\r | |
314 | @param PrefixNewline Did previous print issue a newline\r | |
315 | \r | |
316 | @return TRUE if Q was hit to quit, FALSE in all other cases.\r | |
317 | \r | |
318 | **/\r | |
319 | BOOLEAN\r | |
320 | EFIAPI\r | |
321 | EblAnyKeyToContinueQtoQuit (\r | |
322 | IN UINTN *CurrentRow,\r | |
323 | IN BOOLEAN PrefixNewline\r | |
324 | )\r | |
325 | {\r | |
326 | EFI_INPUT_KEY InputKey;\r | |
327 | \r | |
328 | if (!gPageBreak) {\r | |
329 | // global disable for this feature\r | |
330 | return FALSE;\r | |
331 | }\r | |
332 | \r | |
333 | if (*CurrentRow >= (gScreenRows - 2)) {\r | |
334 | if (PrefixNewline) {\r | |
335 | AsciiPrint ("\n");\r | |
336 | }\r | |
337 | AsciiPrint ("Any key to continue (Q to quit): ");\r | |
338 | EblGetCharKey (&InputKey, 0, NULL);\r | |
339 | AsciiPrint ("\n");\r | |
340 | \r | |
341 | // Time to promt to stop the screen. We have to leave space for the prompt string\r | |
342 | *CurrentRow = 0;\r | |
343 | if (InputKey.UnicodeChar == 'Q' || InputKey.UnicodeChar == 'q') {\r | |
344 | return TRUE;\r | |
345 | }\r | |
346 | } else {\r | |
347 | *CurrentRow += 1;\r | |
348 | }\r | |
349 | \r | |
350 | return FALSE;\r | |
351 | }\r | |
352 | \r | |
353 | \r | |
354 | /**\r | |
355 | Set the text color of the EFI Console. If a zero is passed in reset to\r | |
356 | default text/background color.\r | |
357 | \r | |
358 | @param Attribute For text and background color\r | |
359 | \r | |
360 | **/\r | |
361 | VOID\r | |
362 | EblSetTextColor (\r | |
363 | UINTN Attribute\r | |
364 | )\r | |
365 | {\r | |
366 | if (Attribute == 0) {\r | |
367 | // Set the text color back to default\r | |
368 | Attribute = (UINTN)PcdGet32 (PcdEmbeddedDefaultTextColor);\r | |
369 | }\r | |
370 | \r | |
371 | gST->ConOut->SetAttribute (gST->ConOut, Attribute);\r | |
372 | }\r | |
373 | \r | |
374 | \r | |
375 | /**\r | |
376 | Collect the keyboard input for a cmd line. Carriage Return, New Line, or ESC\r | |
377 | terminates the command line. You can edit the command line via left arrow,\r | |
378 | delete and backspace and they all back up and erase the command line.\r | |
379 | No edit of command line is possible without deletion at this time!\r | |
380 | The up arrow and down arrow fill Cmd with information from the history\r | |
381 | buffer.\r | |
382 | \r | |
383 | @param Cmd Command line to return\r | |
384 | @param CmdMaxSize Maximum size of Cmd\r | |
385 | \r | |
386 | @return The Status of EblGetCharKey()\r | |
387 | \r | |
388 | **/\r | |
389 | EFI_STATUS\r | |
390 | GetCmd (\r | |
391 | IN OUT CHAR8 *Cmd,\r | |
392 | IN UINTN CmdMaxSize\r | |
393 | )\r | |
394 | {\r | |
395 | EFI_STATUS Status;\r | |
396 | UINTN Index;\r | |
397 | UINTN Index2;\r | |
398 | CHAR8 Char;\r | |
399 | CHAR8 *History;\r | |
400 | EFI_INPUT_KEY Key;\r | |
401 | \r | |
402 | for (Index = 0; Index < CmdMaxSize - 1;) {\r | |
403 | Status = EblGetCharKey (&Key, 0, NULL);\r | |
404 | if (EFI_ERROR (Status)) {\r | |
405 | Cmd[Index] = '\0';\r | |
406 | AsciiPrint ("\n");\r | |
407 | return Status;\r | |
408 | }\r | |
409 | \r | |
410 | Char = (CHAR8)Key.UnicodeChar;\r | |
411 | if ((Char == '\n') || (Char == '\r') || (Char == 0x7f)) {\r | |
412 | Cmd[Index] = '\0';\r | |
413 | if (FixedPcdGetBool(PcdEmbeddedShellCharacterEcho) == TRUE) {\r | |
414 | AsciiPrint ("\n\r");\r | |
415 | }\r | |
416 | return EFI_SUCCESS;\r | |
417 | } else if ((Char == '\b') || (Key.ScanCode == SCAN_LEFT) || (Key.ScanCode == SCAN_DELETE)){\r | |
418 | if (Index != 0) {\r | |
419 | Index--;\r | |
420 | //\r | |
421 | // Update the display\r | |
422 | //\r | |
423 | AsciiPrint ("\b \b");\r | |
424 | }\r | |
425 | } else if ((Key.ScanCode == SCAN_UP) || Key.ScanCode == SCAN_DOWN) {\r | |
426 | History = GetCmdHistory (Key.ScanCode);\r | |
427 | //\r | |
428 | // Clear display line\r | |
429 | //\r | |
430 | for (Index2 = 0; Index2 < Index; Index2++) {\r | |
431 | AsciiPrint ("\b \b");\r | |
432 | }\r | |
433 | AsciiPrint (History);\r | |
434 | Index = AsciiStrLen (History);\r | |
435 | AsciiStrnCpyS (Cmd, CmdMaxSize, History, CmdMaxSize);\r | |
436 | } else {\r | |
437 | Cmd[Index++] = Char;\r | |
438 | if (FixedPcdGetBool(PcdEmbeddedShellCharacterEcho) == TRUE) {\r | |
439 | AsciiPrint ("%c", Char);\r | |
440 | }\r | |
441 | }\r | |
442 | }\r | |
443 | \r | |
444 | return EFI_SUCCESS;\r | |
445 | }\r | |
446 | \r | |
447 | \r | |
448 | /**\r | |
449 | Print the boot up banner for the EBL.\r | |
450 | **/\r | |
451 | VOID\r | |
452 | EblPrintStartupBanner (\r | |
453 | VOID\r | |
454 | )\r | |
455 | {\r | |
456 | AsciiPrint ("Embedded Boot Loader (");\r | |
457 | EblSetTextColor (EFI_YELLOW);\r | |
458 | AsciiPrint ("EBL");\r | |
459 | EblSetTextColor (0);\r | |
460 | AsciiPrint (") prototype. Built at %a on %a\n",__TIME__, __DATE__);\r | |
461 | AsciiPrint ("THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN 'AS IS' BASIS,\nWITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\n");\r | |
462 | AsciiPrint ("Please send feedback to edk2-devel@lists.sourceforge.net\n");\r | |
463 | }\r | |
464 | \r | |
465 | \r | |
466 | /**\r | |
467 | Send null requests to all removable media block IO devices so the a media add/remove/change\r | |
468 | can be detected in real before we execute a command.\r | |
469 | \r | |
470 | This is mainly due to the fact that the FAT driver does not do this today so you can get stale\r | |
471 | dir commands after an SD Card has been removed.\r | |
472 | **/\r | |
473 | VOID\r | |
474 | EblProbeRemovableMedia (\r | |
475 | VOID\r | |
476 | )\r | |
477 | {\r | |
478 | UINTN Index;\r | |
479 | UINTN Max;\r | |
480 | EFI_OPEN_FILE *File;\r | |
481 | \r | |
482 | //\r | |
483 | // Probe for media insertion/removal in removable media devices\r | |
484 | //\r | |
485 | Max = EfiGetDeviceCounts (EfiOpenBlockIo);\r | |
486 | if (Max != 0) {\r | |
487 | for (Index = 0; Index < Max; Index++) {\r | |
488 | File = EfiDeviceOpenByType (EfiOpenBlockIo, Index);\r | |
489 | if (File != NULL) {\r | |
490 | if (File->FsBlockIoMedia->RemovableMedia) {\r | |
491 | // Probe to see if media is present (or not) or media changed\r | |
492 | // this causes the ReinstallProtocolInterface() to fire in the\r | |
493 | // block io driver to update the system about media change events\r | |
494 | File->FsBlockIo->ReadBlocks (File->FsBlockIo, File->FsBlockIo->Media->MediaId, (EFI_LBA)0, 0, NULL);\r | |
495 | }\r | |
496 | EfiClose (File);\r | |
497 | }\r | |
498 | }\r | |
499 | }\r | |
500 | }\r | |
501 | \r | |
502 | \r | |
503 | \r | |
504 | \r | |
505 | /**\r | |
506 | Print the prompt for the EBL.\r | |
507 | **/\r | |
508 | VOID\r | |
509 | EblPrompt (\r | |
510 | VOID\r | |
511 | )\r | |
512 | {\r | |
513 | EblSetTextColor (EFI_YELLOW);\r | |
514 | AsciiPrint ("%a %a",(CHAR8 *)PcdGetPtr (PcdEmbeddedPrompt), EfiGetCwd ());\r | |
515 | EblSetTextColor (0);\r | |
516 | AsciiPrint ("%a", ">");\r | |
517 | }\r | |
518 | \r | |
519 | \r | |
520 | \r | |
521 | /**\r | |
522 | Parse a command line and execute the commands. The ; separator allows\r | |
523 | multiple commands for each command line. Stop processing if one of the\r | |
524 | commands returns an error.\r | |
525 | \r | |
526 | @param CmdLine Command Line to process.\r | |
527 | @param MaxCmdLineSize MaxSize of the Command line\r | |
528 | \r | |
529 | @return EFI status of the Command\r | |
530 | \r | |
531 | **/\r | |
532 | EFI_STATUS\r | |
533 | ProcessCmdLine (\r | |
534 | IN CHAR8 *CmdLine,\r | |
535 | IN UINTN MaxCmdLineSize\r | |
536 | )\r | |
537 | {\r | |
538 | EFI_STATUS Status;\r | |
539 | EBL_COMMAND_TABLE *Cmd;\r | |
540 | CHAR8 *Ptr;\r | |
541 | UINTN Argc;\r | |
542 | CHAR8 *Argv[MAX_ARGS];\r | |
543 | \r | |
544 | // Parse the command line. The loop processes commands separated by ;\r | |
545 | for (Ptr = CmdLine, Status = EFI_SUCCESS; Ptr != NULL;) {\r | |
546 | Ptr = ParseArguments (Ptr, &Argc, Argv);\r | |
547 | if (Argc != 0) {\r | |
548 | Cmd = EblGetCommand (Argv[0]);\r | |
549 | if (Cmd != NULL) {\r | |
550 | // Execute the Command!\r | |
551 | Status = Cmd->Command (Argc, Argv);\r | |
552 | if (Status == EFI_ABORTED) {\r | |
553 | // exit command so lets exit\r | |
554 | break;\r | |
555 | } else if (Status == EFI_TIMEOUT) {\r | |
556 | // pause command got input so don't process any more cmd on this cmd line\r | |
557 | break;\r | |
558 | } else if (EFI_ERROR (Status)) {\r | |
559 | AsciiPrint ("%a returned %r error\n", Cmd->Name, Status);\r | |
560 | // if any command fails stop processing CmdLine\r | |
561 | break;\r | |
562 | }\r | |
563 | } else {\r | |
564 | AsciiPrint ("The command '%a' is not supported.\n", Argv[0]);\r | |
565 | }\r | |
566 | }\r | |
567 | }\r | |
568 | \r | |
569 | return Status;\r | |
570 | }\r | |
571 | \r | |
572 | \r | |
573 | \r | |
574 | /**\r | |
575 | Embedded Boot Loader (EBL) - A simple EFI command line application for embedded\r | |
576 | devices. PcdEmbeddedAutomaticBootCommand is a complied in command line that\r | |
577 | gets executed automatically. The ; separator allows multiple commands\r | |
578 | for each command line.\r | |
579 | \r | |
580 | @param ImageHandle EFI ImageHandle for this application.\r | |
581 | @param SystemTable EFI system table\r | |
582 | \r | |
583 | @return EFI status of the application\r | |
584 | \r | |
585 | **/\r | |
586 | EFI_STATUS\r | |
587 | EFIAPI\r | |
588 | EdkBootLoaderEntry (\r | |
589 | IN EFI_HANDLE ImageHandle,\r | |
590 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
591 | )\r | |
592 | {\r | |
593 | EFI_STATUS Status;\r | |
594 | CHAR8 CmdLine[MAX_CMD_LINE];\r | |
595 | CHAR16 *CommandLineVariable = NULL;\r | |
596 | CHAR16 *CommandLineVariableName = L"default-cmdline";\r | |
597 | UINTN CommandLineVariableSize = 0;\r | |
598 | EFI_GUID VendorGuid;\r | |
599 | \r | |
600 | // Initialize tables of commands\r | |
601 | EblInitializeCmdTable ();\r | |
602 | EblInitializeDeviceCmd ();\r | |
603 | EblInitializemdHwDebugCmds ();\r | |
604 | EblInitializemdHwIoDebugCmds ();\r | |
605 | EblInitializeDirCmd ();\r | |
606 | EblInitializeHobCmd ();\r | |
607 | EblInitializeScriptCmd ();\r | |
608 | EblInitializeExternalCmd ();\r | |
609 | EblInitializeNetworkCmd();\r | |
610 | EblInitializeVariableCmds ();\r | |
611 | \r | |
612 | if (gST->ConOut == NULL) {\r | |
613 | DEBUG((EFI_D_ERROR,"Error: No Console Output\n"));\r | |
614 | return EFI_NOT_READY;\r | |
615 | }\r | |
616 | \r | |
617 | // Disable the 5 minute EFI watchdog time so we don't get automatically reset\r | |
618 | gBS->SetWatchdogTimer (0, 0, 0, NULL);\r | |
619 | \r | |
620 | if (FeaturePcdGet (PcdEmbeddedMacBoot)) {\r | |
621 | // A MAC will boot in graphics mode, so turn it back to text here\r | |
622 | // This protocol was removed from edk2. It is only an edk thing. We need to make our own copy.\r | |
623 | // DisableQuietBoot ();\r | |
624 | \r | |
625 | // Enable the biggest output screen size possible\r | |
626 | gST->ConOut->SetMode (gST->ConOut, (UINTN)gST->ConOut->Mode->MaxMode - 1);\r | |
627 | \r | |
628 | }\r | |
629 | \r | |
630 | // Save current screen mode\r | |
631 | gST->ConOut->QueryMode (gST->ConOut, gST->ConOut->Mode->Mode, &gScreenColumns, &gScreenRows);\r | |
632 | \r | |
633 | EblPrintStartupBanner ();\r | |
634 | \r | |
635 | // Parse command line and handle commands separated by ;\r | |
636 | // The loop prints the prompt gets user input and saves history\r | |
637 | \r | |
638 | // Look for a variable with a default command line, otherwise use the Pcd\r | |
639 | ZeroMem(&VendorGuid, sizeof(EFI_GUID));\r | |
640 | \r | |
641 | Status = gRT->GetVariable(CommandLineVariableName, &VendorGuid, NULL, &CommandLineVariableSize, CommandLineVariable);\r | |
642 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
643 | CommandLineVariable = AllocatePool(CommandLineVariableSize);\r | |
644 | \r | |
645 | Status = gRT->GetVariable(CommandLineVariableName, &VendorGuid, NULL, &CommandLineVariableSize, CommandLineVariable);\r | |
646 | if (!EFI_ERROR(Status)) {\r | |
647 | UnicodeStrToAsciiStrS (CommandLineVariable, CmdLine, MAX_CMD_LINE);\r | |
648 | }\r | |
649 | \r | |
650 | FreePool(CommandLineVariable);\r | |
651 | }\r | |
652 | \r | |
653 | if (EFI_ERROR(Status)) {\r | |
654 | AsciiStrCpyS (CmdLine, MAX_CMD_LINE, (CHAR8 *)PcdGetPtr (PcdEmbeddedAutomaticBootCommand));\r | |
655 | }\r | |
656 | \r | |
657 | for (;;) {\r | |
658 | Status = ProcessCmdLine (CmdLine, MAX_CMD_LINE);\r | |
659 | if (Status == EFI_ABORTED) {\r | |
660 | // if a command returns EFI_ABORTED then exit the EBL\r | |
661 | EblShutdownExternalCmdTable ();\r | |
662 | return EFI_SUCCESS;\r | |
663 | }\r | |
664 | \r | |
665 | // get the command line from the user\r | |
666 | EblPrompt ();\r | |
667 | GetCmd (CmdLine, MAX_CMD_LINE);\r | |
668 | SetCmdHistory (CmdLine);\r | |
669 | \r | |
670 | if (FeaturePcdGet (PcdEmbeddedProbeRemovable)) {\r | |
671 | // Probe removable media devices to see if media has been inserted or removed.\r | |
672 | EblProbeRemovableMedia ();\r | |
673 | }\r | |
674 | }\r | |
675 | }\r | |
676 | \r | |
677 | \r |