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Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw...
[mirror_ubuntu-artful-kernel.git] / arch / x86 / boot / compressed / eboot.c
1 /* -----------------------------------------------------------------------
2 *
3 * Copyright 2011 Intel Corporation; author Matt Fleming
4 *
5 * This file is part of the Linux kernel, and is made available under
6 * the terms of the GNU General Public License version 2.
7 *
8 * ----------------------------------------------------------------------- */
9
10 #include <linux/efi.h>
11 #include <linux/pci.h>
12 #include <asm/efi.h>
13 #include <asm/setup.h>
14 #include <asm/desc.h>
15
16 #undef memcpy /* Use memcpy from misc.c */
17
18 #include "eboot.h"
19
20 static efi_system_table_t *sys_table;
21
22 struct efi_config *efi_early;
23
24 #define BOOT_SERVICES(bits) \
25 static void setup_boot_services##bits(struct efi_config *c) \
26 { \
27 efi_system_table_##bits##_t *table; \
28 efi_boot_services_##bits##_t *bt; \
29 \
30 table = (typeof(table))sys_table; \
31 \
32 c->text_output = table->con_out; \
33 \
34 bt = (typeof(bt))(unsigned long)(table->boottime); \
35 \
36 c->allocate_pool = bt->allocate_pool; \
37 c->allocate_pages = bt->allocate_pages; \
38 c->get_memory_map = bt->get_memory_map; \
39 c->free_pool = bt->free_pool; \
40 c->free_pages = bt->free_pages; \
41 c->locate_handle = bt->locate_handle; \
42 c->handle_protocol = bt->handle_protocol; \
43 c->exit_boot_services = bt->exit_boot_services; \
44 }
45 BOOT_SERVICES(32);
46 BOOT_SERVICES(64);
47
48 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
49
50 static efi_status_t
51 __file_size32(void *__fh, efi_char16_t *filename_16,
52 void **handle, u64 *file_sz)
53 {
54 efi_file_handle_32_t *h, *fh = __fh;
55 efi_file_info_t *info;
56 efi_status_t status;
57 efi_guid_t info_guid = EFI_FILE_INFO_ID;
58 u32 info_sz;
59
60 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
61 EFI_FILE_MODE_READ, (u64)0);
62 if (status != EFI_SUCCESS) {
63 efi_printk(sys_table, "Failed to open file: ");
64 efi_char16_printk(sys_table, filename_16);
65 efi_printk(sys_table, "\n");
66 return status;
67 }
68
69 *handle = h;
70
71 info_sz = 0;
72 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
73 &info_sz, NULL);
74 if (status != EFI_BUFFER_TOO_SMALL) {
75 efi_printk(sys_table, "Failed to get file info size\n");
76 return status;
77 }
78
79 grow:
80 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
81 info_sz, (void **)&info);
82 if (status != EFI_SUCCESS) {
83 efi_printk(sys_table, "Failed to alloc mem for file info\n");
84 return status;
85 }
86
87 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
88 &info_sz, info);
89 if (status == EFI_BUFFER_TOO_SMALL) {
90 efi_call_early(free_pool, info);
91 goto grow;
92 }
93
94 *file_sz = info->file_size;
95 efi_call_early(free_pool, info);
96
97 if (status != EFI_SUCCESS)
98 efi_printk(sys_table, "Failed to get initrd info\n");
99
100 return status;
101 }
102
103 static efi_status_t
104 __file_size64(void *__fh, efi_char16_t *filename_16,
105 void **handle, u64 *file_sz)
106 {
107 efi_file_handle_64_t *h, *fh = __fh;
108 efi_file_info_t *info;
109 efi_status_t status;
110 efi_guid_t info_guid = EFI_FILE_INFO_ID;
111 u64 info_sz;
112
113 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
114 EFI_FILE_MODE_READ, (u64)0);
115 if (status != EFI_SUCCESS) {
116 efi_printk(sys_table, "Failed to open file: ");
117 efi_char16_printk(sys_table, filename_16);
118 efi_printk(sys_table, "\n");
119 return status;
120 }
121
122 *handle = h;
123
124 info_sz = 0;
125 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
126 &info_sz, NULL);
127 if (status != EFI_BUFFER_TOO_SMALL) {
128 efi_printk(sys_table, "Failed to get file info size\n");
129 return status;
130 }
131
132 grow:
133 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
134 info_sz, (void **)&info);
135 if (status != EFI_SUCCESS) {
136 efi_printk(sys_table, "Failed to alloc mem for file info\n");
137 return status;
138 }
139
140 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
141 &info_sz, info);
142 if (status == EFI_BUFFER_TOO_SMALL) {
143 efi_call_early(free_pool, info);
144 goto grow;
145 }
146
147 *file_sz = info->file_size;
148 efi_call_early(free_pool, info);
149
150 if (status != EFI_SUCCESS)
151 efi_printk(sys_table, "Failed to get initrd info\n");
152
153 return status;
154 }
155 efi_status_t
156 efi_file_size(efi_system_table_t *sys_table, void *__fh,
157 efi_char16_t *filename_16, void **handle, u64 *file_sz)
158 {
159 if (efi_early->is64)
160 return __file_size64(__fh, filename_16, handle, file_sz);
161
162 return __file_size32(__fh, filename_16, handle, file_sz);
163 }
164
165 efi_status_t
166 efi_file_read(void *handle, unsigned long *size, void *addr)
167 {
168 unsigned long func;
169
170 if (efi_early->is64) {
171 efi_file_handle_64_t *fh = handle;
172
173 func = (unsigned long)fh->read;
174 return efi_early->call(func, handle, size, addr);
175 } else {
176 efi_file_handle_32_t *fh = handle;
177
178 func = (unsigned long)fh->read;
179 return efi_early->call(func, handle, size, addr);
180 }
181 }
182
183 efi_status_t efi_file_close(void *handle)
184 {
185 if (efi_early->is64) {
186 efi_file_handle_64_t *fh = handle;
187
188 return efi_early->call((unsigned long)fh->close, handle);
189 } else {
190 efi_file_handle_32_t *fh = handle;
191
192 return efi_early->call((unsigned long)fh->close, handle);
193 }
194 }
195
196 static inline efi_status_t __open_volume32(void *__image, void **__fh)
197 {
198 efi_file_io_interface_t *io;
199 efi_loaded_image_32_t *image = __image;
200 efi_file_handle_32_t *fh;
201 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
202 efi_status_t status;
203 void *handle = (void *)(unsigned long)image->device_handle;
204 unsigned long func;
205
206 status = efi_call_early(handle_protocol, handle,
207 &fs_proto, (void **)&io);
208 if (status != EFI_SUCCESS) {
209 efi_printk(sys_table, "Failed to handle fs_proto\n");
210 return status;
211 }
212
213 func = (unsigned long)io->open_volume;
214 status = efi_early->call(func, io, &fh);
215 if (status != EFI_SUCCESS)
216 efi_printk(sys_table, "Failed to open volume\n");
217
218 *__fh = fh;
219 return status;
220 }
221
222 static inline efi_status_t __open_volume64(void *__image, void **__fh)
223 {
224 efi_file_io_interface_t *io;
225 efi_loaded_image_64_t *image = __image;
226 efi_file_handle_64_t *fh;
227 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
228 efi_status_t status;
229 void *handle = (void *)(unsigned long)image->device_handle;
230 unsigned long func;
231
232 status = efi_call_early(handle_protocol, handle,
233 &fs_proto, (void **)&io);
234 if (status != EFI_SUCCESS) {
235 efi_printk(sys_table, "Failed to handle fs_proto\n");
236 return status;
237 }
238
239 func = (unsigned long)io->open_volume;
240 status = efi_early->call(func, io, &fh);
241 if (status != EFI_SUCCESS)
242 efi_printk(sys_table, "Failed to open volume\n");
243
244 *__fh = fh;
245 return status;
246 }
247
248 efi_status_t
249 efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
250 {
251 if (efi_early->is64)
252 return __open_volume64(__image, __fh);
253
254 return __open_volume32(__image, __fh);
255 }
256
257 void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
258 {
259 unsigned long output_string;
260 size_t offset;
261
262 if (efi_early->is64) {
263 struct efi_simple_text_output_protocol_64 *out;
264 u64 *func;
265
266 offset = offsetof(typeof(*out), output_string);
267 output_string = efi_early->text_output + offset;
268 func = (u64 *)output_string;
269
270 efi_early->call(*func, efi_early->text_output, str);
271 } else {
272 struct efi_simple_text_output_protocol_32 *out;
273 u32 *func;
274
275 offset = offsetof(typeof(*out), output_string);
276 output_string = efi_early->text_output + offset;
277 func = (u32 *)output_string;
278
279 efi_early->call(*func, efi_early->text_output, str);
280 }
281 }
282
283 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
284 {
285 u8 first, len;
286
287 first = 0;
288 len = 0;
289
290 if (mask) {
291 while (!(mask & 0x1)) {
292 mask = mask >> 1;
293 first++;
294 }
295
296 while (mask & 0x1) {
297 mask = mask >> 1;
298 len++;
299 }
300 }
301
302 *pos = first;
303 *size = len;
304 }
305
306 static efi_status_t
307 __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
308 {
309 struct pci_setup_rom *rom = NULL;
310 efi_status_t status;
311 unsigned long size;
312 uint64_t attributes;
313
314 status = efi_early->call(pci->attributes, pci,
315 EfiPciIoAttributeOperationGet, 0, 0,
316 &attributes);
317 if (status != EFI_SUCCESS)
318 return status;
319
320 if (!pci->romimage || !pci->romsize)
321 return EFI_INVALID_PARAMETER;
322
323 size = pci->romsize + sizeof(*rom);
324
325 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
326 if (status != EFI_SUCCESS)
327 return status;
328
329 memset(rom, 0, sizeof(*rom));
330
331 rom->data.type = SETUP_PCI;
332 rom->data.len = size - sizeof(struct setup_data);
333 rom->data.next = 0;
334 rom->pcilen = pci->romsize;
335 *__rom = rom;
336
337 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
338 PCI_VENDOR_ID, 1, &(rom->vendor));
339
340 if (status != EFI_SUCCESS)
341 goto free_struct;
342
343 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
344 PCI_DEVICE_ID, 1, &(rom->devid));
345
346 if (status != EFI_SUCCESS)
347 goto free_struct;
348
349 status = efi_early->call(pci->get_location, pci, &(rom->segment),
350 &(rom->bus), &(rom->device), &(rom->function));
351
352 if (status != EFI_SUCCESS)
353 goto free_struct;
354
355 memcpy(rom->romdata, pci->romimage, pci->romsize);
356 return status;
357
358 free_struct:
359 efi_call_early(free_pool, rom);
360 return status;
361 }
362
363 static efi_status_t
364 setup_efi_pci32(struct boot_params *params, void **pci_handle,
365 unsigned long size)
366 {
367 efi_pci_io_protocol_32 *pci = NULL;
368 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
369 u32 *handles = (u32 *)(unsigned long)pci_handle;
370 efi_status_t status;
371 unsigned long nr_pci;
372 struct setup_data *data;
373 int i;
374
375 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
376
377 while (data && data->next)
378 data = (struct setup_data *)(unsigned long)data->next;
379
380 nr_pci = size / sizeof(u32);
381 for (i = 0; i < nr_pci; i++) {
382 struct pci_setup_rom *rom = NULL;
383 u32 h = handles[i];
384
385 status = efi_call_early(handle_protocol, h,
386 &pci_proto, (void **)&pci);
387
388 if (status != EFI_SUCCESS)
389 continue;
390
391 if (!pci)
392 continue;
393
394 status = __setup_efi_pci32(pci, &rom);
395 if (status != EFI_SUCCESS)
396 continue;
397
398 if (data)
399 data->next = (unsigned long)rom;
400 else
401 params->hdr.setup_data = (unsigned long)rom;
402
403 data = (struct setup_data *)rom;
404
405 }
406
407 return status;
408 }
409
410 static efi_status_t
411 __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
412 {
413 struct pci_setup_rom *rom;
414 efi_status_t status;
415 unsigned long size;
416 uint64_t attributes;
417
418 status = efi_early->call(pci->attributes, pci,
419 EfiPciIoAttributeOperationGet, 0,
420 &attributes);
421 if (status != EFI_SUCCESS)
422 return status;
423
424 if (!pci->romimage || !pci->romsize)
425 return EFI_INVALID_PARAMETER;
426
427 size = pci->romsize + sizeof(*rom);
428
429 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
430 if (status != EFI_SUCCESS)
431 return status;
432
433 rom->data.type = SETUP_PCI;
434 rom->data.len = size - sizeof(struct setup_data);
435 rom->data.next = 0;
436 rom->pcilen = pci->romsize;
437 *__rom = rom;
438
439 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
440 PCI_VENDOR_ID, 1, &(rom->vendor));
441
442 if (status != EFI_SUCCESS)
443 goto free_struct;
444
445 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
446 PCI_DEVICE_ID, 1, &(rom->devid));
447
448 if (status != EFI_SUCCESS)
449 goto free_struct;
450
451 status = efi_early->call(pci->get_location, pci, &(rom->segment),
452 &(rom->bus), &(rom->device), &(rom->function));
453
454 if (status != EFI_SUCCESS)
455 goto free_struct;
456
457 memcpy(rom->romdata, pci->romimage, pci->romsize);
458 return status;
459
460 free_struct:
461 efi_call_early(free_pool, rom);
462 return status;
463
464 }
465
466 static efi_status_t
467 setup_efi_pci64(struct boot_params *params, void **pci_handle,
468 unsigned long size)
469 {
470 efi_pci_io_protocol_64 *pci = NULL;
471 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
472 u64 *handles = (u64 *)(unsigned long)pci_handle;
473 efi_status_t status;
474 unsigned long nr_pci;
475 struct setup_data *data;
476 int i;
477
478 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
479
480 while (data && data->next)
481 data = (struct setup_data *)(unsigned long)data->next;
482
483 nr_pci = size / sizeof(u64);
484 for (i = 0; i < nr_pci; i++) {
485 struct pci_setup_rom *rom = NULL;
486 u64 h = handles[i];
487
488 status = efi_call_early(handle_protocol, h,
489 &pci_proto, (void **)&pci);
490
491 if (status != EFI_SUCCESS)
492 continue;
493
494 if (!pci)
495 continue;
496
497 status = __setup_efi_pci64(pci, &rom);
498 if (status != EFI_SUCCESS)
499 continue;
500
501 if (data)
502 data->next = (unsigned long)rom;
503 else
504 params->hdr.setup_data = (unsigned long)rom;
505
506 data = (struct setup_data *)rom;
507
508 }
509
510 return status;
511 }
512
513 static efi_status_t setup_efi_pci(struct boot_params *params)
514 {
515 efi_status_t status;
516 void **pci_handle = NULL;
517 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
518 unsigned long size = 0;
519
520 status = efi_call_early(locate_handle,
521 EFI_LOCATE_BY_PROTOCOL,
522 &pci_proto, NULL, &size, pci_handle);
523
524 if (status == EFI_BUFFER_TOO_SMALL) {
525 status = efi_call_early(allocate_pool,
526 EFI_LOADER_DATA,
527 size, (void **)&pci_handle);
528
529 if (status != EFI_SUCCESS)
530 return status;
531
532 status = efi_call_early(locate_handle,
533 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
534 NULL, &size, pci_handle);
535 }
536
537 if (status != EFI_SUCCESS)
538 goto free_handle;
539
540 if (efi_early->is64)
541 status = setup_efi_pci64(params, pci_handle, size);
542 else
543 status = setup_efi_pci32(params, pci_handle, size);
544
545 free_handle:
546 efi_call_early(free_pool, pci_handle);
547 return status;
548 }
549
550 static void
551 setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
552 struct efi_pixel_bitmask pixel_info, int pixel_format)
553 {
554 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
555 si->lfb_depth = 32;
556 si->lfb_linelength = pixels_per_scan_line * 4;
557 si->red_size = 8;
558 si->red_pos = 0;
559 si->green_size = 8;
560 si->green_pos = 8;
561 si->blue_size = 8;
562 si->blue_pos = 16;
563 si->rsvd_size = 8;
564 si->rsvd_pos = 24;
565 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
566 si->lfb_depth = 32;
567 si->lfb_linelength = pixels_per_scan_line * 4;
568 si->red_size = 8;
569 si->red_pos = 16;
570 si->green_size = 8;
571 si->green_pos = 8;
572 si->blue_size = 8;
573 si->blue_pos = 0;
574 si->rsvd_size = 8;
575 si->rsvd_pos = 24;
576 } else if (pixel_format == PIXEL_BIT_MASK) {
577 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
578 find_bits(pixel_info.green_mask, &si->green_pos,
579 &si->green_size);
580 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
581 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
582 &si->rsvd_size);
583 si->lfb_depth = si->red_size + si->green_size +
584 si->blue_size + si->rsvd_size;
585 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
586 } else {
587 si->lfb_depth = 4;
588 si->lfb_linelength = si->lfb_width / 2;
589 si->red_size = 0;
590 si->red_pos = 0;
591 si->green_size = 0;
592 si->green_pos = 0;
593 si->blue_size = 0;
594 si->blue_pos = 0;
595 si->rsvd_size = 0;
596 si->rsvd_pos = 0;
597 }
598 }
599
600 static efi_status_t
601 __gop_query32(struct efi_graphics_output_protocol_32 *gop32,
602 struct efi_graphics_output_mode_info **info,
603 unsigned long *size, u32 *fb_base)
604 {
605 struct efi_graphics_output_protocol_mode_32 *mode;
606 efi_status_t status;
607 unsigned long m;
608
609 m = gop32->mode;
610 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
611
612 status = efi_early->call(gop32->query_mode, gop32,
613 mode->mode, size, info);
614 if (status != EFI_SUCCESS)
615 return status;
616
617 *fb_base = mode->frame_buffer_base;
618 return status;
619 }
620
621 static efi_status_t
622 setup_gop32(struct screen_info *si, efi_guid_t *proto,
623 unsigned long size, void **gop_handle)
624 {
625 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
626 unsigned long nr_gops;
627 u16 width, height;
628 u32 pixels_per_scan_line;
629 u32 fb_base;
630 struct efi_pixel_bitmask pixel_info;
631 int pixel_format;
632 efi_status_t status;
633 u32 *handles = (u32 *)(unsigned long)gop_handle;
634 int i;
635
636 first_gop = NULL;
637 gop32 = NULL;
638
639 nr_gops = size / sizeof(u32);
640 for (i = 0; i < nr_gops; i++) {
641 struct efi_graphics_output_mode_info *info = NULL;
642 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
643 bool conout_found = false;
644 void *dummy = NULL;
645 u32 h = handles[i];
646
647 status = efi_call_early(handle_protocol, h,
648 proto, (void **)&gop32);
649 if (status != EFI_SUCCESS)
650 continue;
651
652 status = efi_call_early(handle_protocol, h,
653 &conout_proto, &dummy);
654 if (status == EFI_SUCCESS)
655 conout_found = true;
656
657 status = __gop_query32(gop32, &info, &size, &fb_base);
658 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
659 /*
660 * Systems that use the UEFI Console Splitter may
661 * provide multiple GOP devices, not all of which are
662 * backed by real hardware. The workaround is to search
663 * for a GOP implementing the ConOut protocol, and if
664 * one isn't found, to just fall back to the first GOP.
665 */
666 width = info->horizontal_resolution;
667 height = info->vertical_resolution;
668 pixel_format = info->pixel_format;
669 pixel_info = info->pixel_information;
670 pixels_per_scan_line = info->pixels_per_scan_line;
671
672 /*
673 * Once we've found a GOP supporting ConOut,
674 * don't bother looking any further.
675 */
676 first_gop = gop32;
677 if (conout_found)
678 break;
679 }
680 }
681
682 /* Did we find any GOPs? */
683 if (!first_gop)
684 goto out;
685
686 /* EFI framebuffer */
687 si->orig_video_isVGA = VIDEO_TYPE_EFI;
688
689 si->lfb_width = width;
690 si->lfb_height = height;
691 si->lfb_base = fb_base;
692 si->pages = 1;
693
694 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
695
696 si->lfb_size = si->lfb_linelength * si->lfb_height;
697
698 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
699 out:
700 return status;
701 }
702
703 static efi_status_t
704 __gop_query64(struct efi_graphics_output_protocol_64 *gop64,
705 struct efi_graphics_output_mode_info **info,
706 unsigned long *size, u32 *fb_base)
707 {
708 struct efi_graphics_output_protocol_mode_64 *mode;
709 efi_status_t status;
710 unsigned long m;
711
712 m = gop64->mode;
713 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
714
715 status = efi_early->call(gop64->query_mode, gop64,
716 mode->mode, size, info);
717 if (status != EFI_SUCCESS)
718 return status;
719
720 *fb_base = mode->frame_buffer_base;
721 return status;
722 }
723
724 static efi_status_t
725 setup_gop64(struct screen_info *si, efi_guid_t *proto,
726 unsigned long size, void **gop_handle)
727 {
728 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
729 unsigned long nr_gops;
730 u16 width, height;
731 u32 pixels_per_scan_line;
732 u32 fb_base;
733 struct efi_pixel_bitmask pixel_info;
734 int pixel_format;
735 efi_status_t status;
736 u64 *handles = (u64 *)(unsigned long)gop_handle;
737 int i;
738
739 first_gop = NULL;
740 gop64 = NULL;
741
742 nr_gops = size / sizeof(u64);
743 for (i = 0; i < nr_gops; i++) {
744 struct efi_graphics_output_mode_info *info = NULL;
745 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
746 bool conout_found = false;
747 void *dummy = NULL;
748 u64 h = handles[i];
749
750 status = efi_call_early(handle_protocol, h,
751 proto, (void **)&gop64);
752 if (status != EFI_SUCCESS)
753 continue;
754
755 status = efi_call_early(handle_protocol, h,
756 &conout_proto, &dummy);
757 if (status == EFI_SUCCESS)
758 conout_found = true;
759
760 status = __gop_query64(gop64, &info, &size, &fb_base);
761 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
762 /*
763 * Systems that use the UEFI Console Splitter may
764 * provide multiple GOP devices, not all of which are
765 * backed by real hardware. The workaround is to search
766 * for a GOP implementing the ConOut protocol, and if
767 * one isn't found, to just fall back to the first GOP.
768 */
769 width = info->horizontal_resolution;
770 height = info->vertical_resolution;
771 pixel_format = info->pixel_format;
772 pixel_info = info->pixel_information;
773 pixels_per_scan_line = info->pixels_per_scan_line;
774
775 /*
776 * Once we've found a GOP supporting ConOut,
777 * don't bother looking any further.
778 */
779 first_gop = gop64;
780 if (conout_found)
781 break;
782 }
783 }
784
785 /* Did we find any GOPs? */
786 if (!first_gop)
787 goto out;
788
789 /* EFI framebuffer */
790 si->orig_video_isVGA = VIDEO_TYPE_EFI;
791
792 si->lfb_width = width;
793 si->lfb_height = height;
794 si->lfb_base = fb_base;
795 si->pages = 1;
796
797 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
798
799 si->lfb_size = si->lfb_linelength * si->lfb_height;
800
801 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
802 out:
803 return status;
804 }
805
806 /*
807 * See if we have Graphics Output Protocol
808 */
809 static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
810 unsigned long size)
811 {
812 efi_status_t status;
813 void **gop_handle = NULL;
814
815 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
816 size, (void **)&gop_handle);
817 if (status != EFI_SUCCESS)
818 return status;
819
820 status = efi_call_early(locate_handle,
821 EFI_LOCATE_BY_PROTOCOL,
822 proto, NULL, &size, gop_handle);
823 if (status != EFI_SUCCESS)
824 goto free_handle;
825
826 if (efi_early->is64)
827 status = setup_gop64(si, proto, size, gop_handle);
828 else
829 status = setup_gop32(si, proto, size, gop_handle);
830
831 free_handle:
832 efi_call_early(free_pool, gop_handle);
833 return status;
834 }
835
836 static efi_status_t
837 setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
838 {
839 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
840 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
841 unsigned long nr_ugas;
842 u32 *handles = (u32 *)uga_handle;;
843 efi_status_t status;
844 int i;
845
846 first_uga = NULL;
847 nr_ugas = size / sizeof(u32);
848 for (i = 0; i < nr_ugas; i++) {
849 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
850 u32 w, h, depth, refresh;
851 void *pciio;
852 u32 handle = handles[i];
853
854 status = efi_call_early(handle_protocol, handle,
855 &uga_proto, (void **)&uga);
856 if (status != EFI_SUCCESS)
857 continue;
858
859 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
860
861 status = efi_early->call((unsigned long)uga->get_mode, uga,
862 &w, &h, &depth, &refresh);
863 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
864 *width = w;
865 *height = h;
866
867 /*
868 * Once we've found a UGA supporting PCIIO,
869 * don't bother looking any further.
870 */
871 if (pciio)
872 break;
873
874 first_uga = uga;
875 }
876 }
877
878 return status;
879 }
880
881 static efi_status_t
882 setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
883 {
884 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
885 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
886 unsigned long nr_ugas;
887 u64 *handles = (u64 *)uga_handle;;
888 efi_status_t status;
889 int i;
890
891 first_uga = NULL;
892 nr_ugas = size / sizeof(u64);
893 for (i = 0; i < nr_ugas; i++) {
894 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
895 u32 w, h, depth, refresh;
896 void *pciio;
897 u64 handle = handles[i];
898
899 status = efi_call_early(handle_protocol, handle,
900 &uga_proto, (void **)&uga);
901 if (status != EFI_SUCCESS)
902 continue;
903
904 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
905
906 status = efi_early->call((unsigned long)uga->get_mode, uga,
907 &w, &h, &depth, &refresh);
908 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
909 *width = w;
910 *height = h;
911
912 /*
913 * Once we've found a UGA supporting PCIIO,
914 * don't bother looking any further.
915 */
916 if (pciio)
917 break;
918
919 first_uga = uga;
920 }
921 }
922
923 return status;
924 }
925
926 /*
927 * See if we have Universal Graphics Adapter (UGA) protocol
928 */
929 static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
930 unsigned long size)
931 {
932 efi_status_t status;
933 u32 width, height;
934 void **uga_handle = NULL;
935
936 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
937 size, (void **)&uga_handle);
938 if (status != EFI_SUCCESS)
939 return status;
940
941 status = efi_call_early(locate_handle,
942 EFI_LOCATE_BY_PROTOCOL,
943 uga_proto, NULL, &size, uga_handle);
944 if (status != EFI_SUCCESS)
945 goto free_handle;
946
947 height = 0;
948 width = 0;
949
950 if (efi_early->is64)
951 status = setup_uga64(uga_handle, size, &width, &height);
952 else
953 status = setup_uga32(uga_handle, size, &width, &height);
954
955 if (!width && !height)
956 goto free_handle;
957
958 /* EFI framebuffer */
959 si->orig_video_isVGA = VIDEO_TYPE_EFI;
960
961 si->lfb_depth = 32;
962 si->lfb_width = width;
963 si->lfb_height = height;
964
965 si->red_size = 8;
966 si->red_pos = 16;
967 si->green_size = 8;
968 si->green_pos = 8;
969 si->blue_size = 8;
970 si->blue_pos = 0;
971 si->rsvd_size = 8;
972 si->rsvd_pos = 24;
973
974 free_handle:
975 efi_call_early(free_pool, uga_handle);
976 return status;
977 }
978
979 void setup_graphics(struct boot_params *boot_params)
980 {
981 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
982 struct screen_info *si;
983 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
984 efi_status_t status;
985 unsigned long size;
986 void **gop_handle = NULL;
987 void **uga_handle = NULL;
988
989 si = &boot_params->screen_info;
990 memset(si, 0, sizeof(*si));
991
992 size = 0;
993 status = efi_call_early(locate_handle,
994 EFI_LOCATE_BY_PROTOCOL,
995 &graphics_proto, NULL, &size, gop_handle);
996 if (status == EFI_BUFFER_TOO_SMALL)
997 status = setup_gop(si, &graphics_proto, size);
998
999 if (status != EFI_SUCCESS) {
1000 size = 0;
1001 status = efi_call_early(locate_handle,
1002 EFI_LOCATE_BY_PROTOCOL,
1003 &uga_proto, NULL, &size, uga_handle);
1004 if (status == EFI_BUFFER_TOO_SMALL)
1005 setup_uga(si, &uga_proto, size);
1006 }
1007 }
1008
1009 /*
1010 * Because the x86 boot code expects to be passed a boot_params we
1011 * need to create one ourselves (usually the bootloader would create
1012 * one for us).
1013 *
1014 * The caller is responsible for filling out ->code32_start in the
1015 * returned boot_params.
1016 */
1017 struct boot_params *make_boot_params(struct efi_config *c)
1018 {
1019 struct boot_params *boot_params;
1020 struct sys_desc_table *sdt;
1021 struct apm_bios_info *bi;
1022 struct setup_header *hdr;
1023 struct efi_info *efi;
1024 efi_loaded_image_t *image;
1025 void *options, *handle;
1026 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
1027 int options_size = 0;
1028 efi_status_t status;
1029 char *cmdline_ptr;
1030 u16 *s2;
1031 u8 *s1;
1032 int i;
1033 unsigned long ramdisk_addr;
1034 unsigned long ramdisk_size;
1035 unsigned long initrd_addr_max;
1036
1037 efi_early = c;
1038 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1039 handle = (void *)(unsigned long)efi_early->image_handle;
1040
1041 /* Check if we were booted by the EFI firmware */
1042 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1043 return NULL;
1044
1045 if (efi_early->is64)
1046 setup_boot_services64(efi_early);
1047 else
1048 setup_boot_services32(efi_early);
1049
1050 status = efi_call_early(handle_protocol, handle,
1051 &proto, (void *)&image);
1052 if (status != EFI_SUCCESS) {
1053 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
1054 return NULL;
1055 }
1056
1057 status = efi_low_alloc(sys_table, 0x4000, 1,
1058 (unsigned long *)&boot_params);
1059 if (status != EFI_SUCCESS) {
1060 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
1061 return NULL;
1062 }
1063
1064 memset(boot_params, 0x0, 0x4000);
1065
1066 hdr = &boot_params->hdr;
1067 efi = &boot_params->efi_info;
1068 bi = &boot_params->apm_bios_info;
1069 sdt = &boot_params->sys_desc_table;
1070
1071 /* Copy the second sector to boot_params */
1072 memcpy(&hdr->jump, image->image_base + 512, 512);
1073
1074 /*
1075 * Fill out some of the header fields ourselves because the
1076 * EFI firmware loader doesn't load the first sector.
1077 */
1078 hdr->root_flags = 1;
1079 hdr->vid_mode = 0xffff;
1080 hdr->boot_flag = 0xAA55;
1081
1082 hdr->type_of_loader = 0x21;
1083
1084 /* Convert unicode cmdline to ascii */
1085 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
1086 if (!cmdline_ptr)
1087 goto fail;
1088 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
1089
1090 hdr->ramdisk_image = 0;
1091 hdr->ramdisk_size = 0;
1092
1093 /* Clear APM BIOS info */
1094 memset(bi, 0, sizeof(*bi));
1095
1096 memset(sdt, 0, sizeof(*sdt));
1097
1098 if (hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)
1099 initrd_addr_max = -1UL;
1100 else
1101 initrd_addr_max = hdr->initrd_addr_max;
1102
1103 status = handle_cmdline_files(sys_table, image,
1104 (char *)(unsigned long)hdr->cmd_line_ptr,
1105 "initrd=", initrd_addr_max,
1106 &ramdisk_addr, &ramdisk_size);
1107 if (status != EFI_SUCCESS)
1108 goto fail2;
1109 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
1110 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
1111 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
1112 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
1113
1114 return boot_params;
1115 fail2:
1116 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
1117 fail:
1118 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
1119 return NULL;
1120 }
1121
1122 static void add_e820ext(struct boot_params *params,
1123 struct setup_data *e820ext, u32 nr_entries)
1124 {
1125 struct setup_data *data;
1126 efi_status_t status;
1127 unsigned long size;
1128
1129 e820ext->type = SETUP_E820_EXT;
1130 e820ext->len = nr_entries * sizeof(struct e820entry);
1131 e820ext->next = 0;
1132
1133 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
1134
1135 while (data && data->next)
1136 data = (struct setup_data *)(unsigned long)data->next;
1137
1138 if (data)
1139 data->next = (unsigned long)e820ext;
1140 else
1141 params->hdr.setup_data = (unsigned long)e820ext;
1142 }
1143
1144 static efi_status_t setup_e820(struct boot_params *params,
1145 struct setup_data *e820ext, u32 e820ext_size)
1146 {
1147 struct e820entry *e820_map = &params->e820_map[0];
1148 struct efi_info *efi = &params->efi_info;
1149 struct e820entry *prev = NULL;
1150 u32 nr_entries;
1151 u32 nr_desc;
1152 int i;
1153
1154 nr_entries = 0;
1155 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1156
1157 for (i = 0; i < nr_desc; i++) {
1158 efi_memory_desc_t *d;
1159 unsigned int e820_type = 0;
1160 unsigned long m = efi->efi_memmap;
1161
1162 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
1163 switch (d->type) {
1164 case EFI_RESERVED_TYPE:
1165 case EFI_RUNTIME_SERVICES_CODE:
1166 case EFI_RUNTIME_SERVICES_DATA:
1167 case EFI_MEMORY_MAPPED_IO:
1168 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1169 case EFI_PAL_CODE:
1170 e820_type = E820_RESERVED;
1171 break;
1172
1173 case EFI_UNUSABLE_MEMORY:
1174 e820_type = E820_UNUSABLE;
1175 break;
1176
1177 case EFI_ACPI_RECLAIM_MEMORY:
1178 e820_type = E820_ACPI;
1179 break;
1180
1181 case EFI_LOADER_CODE:
1182 case EFI_LOADER_DATA:
1183 case EFI_BOOT_SERVICES_CODE:
1184 case EFI_BOOT_SERVICES_DATA:
1185 case EFI_CONVENTIONAL_MEMORY:
1186 e820_type = E820_RAM;
1187 break;
1188
1189 case EFI_ACPI_MEMORY_NVS:
1190 e820_type = E820_NVS;
1191 break;
1192
1193 default:
1194 continue;
1195 }
1196
1197 /* Merge adjacent mappings */
1198 if (prev && prev->type == e820_type &&
1199 (prev->addr + prev->size) == d->phys_addr) {
1200 prev->size += d->num_pages << 12;
1201 continue;
1202 }
1203
1204 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1205 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1206 sizeof(struct setup_data);
1207
1208 if (!e820ext || e820ext_size < need)
1209 return EFI_BUFFER_TOO_SMALL;
1210
1211 /* boot_params map full, switch to e820 extended */
1212 e820_map = (struct e820entry *)e820ext->data;
1213 }
1214
1215 e820_map->addr = d->phys_addr;
1216 e820_map->size = d->num_pages << PAGE_SHIFT;
1217 e820_map->type = e820_type;
1218 prev = e820_map++;
1219 nr_entries++;
1220 }
1221
1222 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1223 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1224
1225 add_e820ext(params, e820ext, nr_e820ext);
1226 nr_entries -= nr_e820ext;
1227 }
1228
1229 params->e820_entries = (u8)nr_entries;
1230
1231 return EFI_SUCCESS;
1232 }
1233
1234 static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1235 u32 *e820ext_size)
1236 {
1237 efi_status_t status;
1238 unsigned long size;
1239
1240 size = sizeof(struct setup_data) +
1241 sizeof(struct e820entry) * nr_desc;
1242
1243 if (*e820ext) {
1244 efi_call_early(free_pool, *e820ext);
1245 *e820ext = NULL;
1246 *e820ext_size = 0;
1247 }
1248
1249 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1250 size, (void **)e820ext);
1251 if (status == EFI_SUCCESS)
1252 *e820ext_size = size;
1253
1254 return status;
1255 }
1256
1257 static efi_status_t exit_boot(struct boot_params *boot_params,
1258 void *handle, bool is64)
1259 {
1260 struct efi_info *efi = &boot_params->efi_info;
1261 unsigned long map_sz, key, desc_size;
1262 efi_memory_desc_t *mem_map;
1263 struct setup_data *e820ext;
1264 const char *signature;
1265 __u32 e820ext_size;
1266 __u32 nr_desc, prev_nr_desc;
1267 efi_status_t status;
1268 __u32 desc_version;
1269 bool called_exit = false;
1270 u8 nr_entries;
1271 int i;
1272
1273 nr_desc = 0;
1274 e820ext = NULL;
1275 e820ext_size = 0;
1276
1277 get_map:
1278 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1279 &desc_version, &key);
1280
1281 if (status != EFI_SUCCESS)
1282 return status;
1283
1284 prev_nr_desc = nr_desc;
1285 nr_desc = map_sz / desc_size;
1286 if (nr_desc > prev_nr_desc &&
1287 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1288 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1289
1290 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1291 if (status != EFI_SUCCESS)
1292 goto free_mem_map;
1293
1294 efi_call_early(free_pool, mem_map);
1295 goto get_map; /* Allocated memory, get map again */
1296 }
1297
1298 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1299 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1300
1301 efi->efi_systab = (unsigned long)sys_table;
1302 efi->efi_memdesc_size = desc_size;
1303 efi->efi_memdesc_version = desc_version;
1304 efi->efi_memmap = (unsigned long)mem_map;
1305 efi->efi_memmap_size = map_sz;
1306
1307 #ifdef CONFIG_X86_64
1308 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1309 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1310 #endif
1311
1312 /* Might as well exit boot services now */
1313 status = efi_call_early(exit_boot_services, handle, key);
1314 if (status != EFI_SUCCESS) {
1315 /*
1316 * ExitBootServices() will fail if any of the event
1317 * handlers change the memory map. In which case, we
1318 * must be prepared to retry, but only once so that
1319 * we're guaranteed to exit on repeated failures instead
1320 * of spinning forever.
1321 */
1322 if (called_exit)
1323 goto free_mem_map;
1324
1325 called_exit = true;
1326 efi_call_early(free_pool, mem_map);
1327 goto get_map;
1328 }
1329
1330 /* Historic? */
1331 boot_params->alt_mem_k = 32 * 1024;
1332
1333 status = setup_e820(boot_params, e820ext, e820ext_size);
1334 if (status != EFI_SUCCESS)
1335 return status;
1336
1337 return EFI_SUCCESS;
1338
1339 free_mem_map:
1340 efi_call_early(free_pool, mem_map);
1341 return status;
1342 }
1343
1344 /*
1345 * On success we return a pointer to a boot_params structure, and NULL
1346 * on failure.
1347 */
1348 struct boot_params *efi_main(struct efi_config *c,
1349 struct boot_params *boot_params)
1350 {
1351 struct desc_ptr *gdt = NULL;
1352 efi_loaded_image_t *image;
1353 struct setup_header *hdr = &boot_params->hdr;
1354 efi_status_t status;
1355 struct desc_struct *desc;
1356 void *handle;
1357 efi_system_table_t *_table;
1358 bool is64;
1359
1360 efi_early = c;
1361
1362 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1363 handle = (void *)(unsigned long)efi_early->image_handle;
1364 is64 = efi_early->is64;
1365
1366 sys_table = _table;
1367
1368 /* Check if we were booted by the EFI firmware */
1369 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1370 goto fail;
1371
1372 if (is64)
1373 setup_boot_services64(efi_early);
1374 else
1375 setup_boot_services32(efi_early);
1376
1377 setup_graphics(boot_params);
1378
1379 status = setup_efi_pci(boot_params);
1380 if (status != EFI_SUCCESS) {
1381 efi_printk(sys_table, "setup_efi_pci() failed!\n");
1382 }
1383
1384 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1385 sizeof(*gdt), (void **)&gdt);
1386 if (status != EFI_SUCCESS) {
1387 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1388 goto fail;
1389 }
1390
1391 gdt->size = 0x800;
1392 status = efi_low_alloc(sys_table, gdt->size, 8,
1393 (unsigned long *)&gdt->address);
1394 if (status != EFI_SUCCESS) {
1395 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1396 goto fail;
1397 }
1398
1399 /*
1400 * If the kernel isn't already loaded at the preferred load
1401 * address, relocate it.
1402 */
1403 if (hdr->pref_address != hdr->code32_start) {
1404 unsigned long bzimage_addr = hdr->code32_start;
1405 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1406 hdr->init_size, hdr->init_size,
1407 hdr->pref_address,
1408 hdr->kernel_alignment);
1409 if (status != EFI_SUCCESS) {
1410 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
1411 goto fail;
1412 }
1413
1414 hdr->pref_address = hdr->code32_start;
1415 hdr->code32_start = bzimage_addr;
1416 }
1417
1418 status = exit_boot(boot_params, handle, is64);
1419 if (status != EFI_SUCCESS) {
1420 efi_printk(sys_table, "exit_boot() failed!\n");
1421 goto fail;
1422 }
1423
1424 memset((char *)gdt->address, 0x0, gdt->size);
1425 desc = (struct desc_struct *)gdt->address;
1426
1427 /* The first GDT is a dummy and the second is unused. */
1428 desc += 2;
1429
1430 desc->limit0 = 0xffff;
1431 desc->base0 = 0x0000;
1432 desc->base1 = 0x0000;
1433 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1434 desc->s = DESC_TYPE_CODE_DATA;
1435 desc->dpl = 0;
1436 desc->p = 1;
1437 desc->limit = 0xf;
1438 desc->avl = 0;
1439 desc->l = 0;
1440 desc->d = SEG_OP_SIZE_32BIT;
1441 desc->g = SEG_GRANULARITY_4KB;
1442 desc->base2 = 0x00;
1443
1444 desc++;
1445 desc->limit0 = 0xffff;
1446 desc->base0 = 0x0000;
1447 desc->base1 = 0x0000;
1448 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1449 desc->s = DESC_TYPE_CODE_DATA;
1450 desc->dpl = 0;
1451 desc->p = 1;
1452 desc->limit = 0xf;
1453 desc->avl = 0;
1454 desc->l = 0;
1455 desc->d = SEG_OP_SIZE_32BIT;
1456 desc->g = SEG_GRANULARITY_4KB;
1457 desc->base2 = 0x00;
1458
1459 #ifdef CONFIG_X86_64
1460 /* Task segment value */
1461 desc++;
1462 desc->limit0 = 0x0000;
1463 desc->base0 = 0x0000;
1464 desc->base1 = 0x0000;
1465 desc->type = SEG_TYPE_TSS;
1466 desc->s = 0;
1467 desc->dpl = 0;
1468 desc->p = 1;
1469 desc->limit = 0x0;
1470 desc->avl = 0;
1471 desc->l = 0;
1472 desc->d = 0;
1473 desc->g = SEG_GRANULARITY_4KB;
1474 desc->base2 = 0x00;
1475 #endif /* CONFIG_X86_64 */
1476
1477 asm volatile("cli");
1478 asm volatile ("lgdt %0" : : "m" (*gdt));
1479
1480 return boot_params;
1481 fail:
1482 efi_printk(sys_table, "efi_main() failed!\n");
1483 return NULL;
1484 }
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