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Merge remote-tracking branch 'tip/auto-latest'
[deliverable/linux.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 #include "../string.h"
17 #include "eboot.h"
18
19 static efi_system_table_t *sys_table;
20
21 static struct efi_config *efi_early;
22
23 __pure const struct efi_config *__efi_early(void)
24 {
25 return efi_early;
26 }
27
28 #define BOOT_SERVICES(bits) \
29 static void setup_boot_services##bits(struct efi_config *c) \
30 { \
31 efi_system_table_##bits##_t *table; \
32 efi_boot_services_##bits##_t *bt; \
33 \
34 table = (typeof(table))sys_table; \
35 \
36 c->text_output = table->con_out; \
37 \
38 bt = (typeof(bt))(unsigned long)(table->boottime); \
39 \
40 c->allocate_pool = bt->allocate_pool; \
41 c->allocate_pages = bt->allocate_pages; \
42 c->get_memory_map = bt->get_memory_map; \
43 c->free_pool = bt->free_pool; \
44 c->free_pages = bt->free_pages; \
45 c->locate_handle = bt->locate_handle; \
46 c->handle_protocol = bt->handle_protocol; \
47 c->exit_boot_services = bt->exit_boot_services; \
48 }
49 BOOT_SERVICES(32);
50 BOOT_SERVICES(64);
51
52 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
53
54 static efi_status_t
55 __file_size32(void *__fh, efi_char16_t *filename_16,
56 void **handle, u64 *file_sz)
57 {
58 efi_file_handle_32_t *h, *fh = __fh;
59 efi_file_info_t *info;
60 efi_status_t status;
61 efi_guid_t info_guid = EFI_FILE_INFO_ID;
62 u32 info_sz;
63
64 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
65 EFI_FILE_MODE_READ, (u64)0);
66 if (status != EFI_SUCCESS) {
67 efi_printk(sys_table, "Failed to open file: ");
68 efi_char16_printk(sys_table, filename_16);
69 efi_printk(sys_table, "\n");
70 return status;
71 }
72
73 *handle = h;
74
75 info_sz = 0;
76 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
77 &info_sz, NULL);
78 if (status != EFI_BUFFER_TOO_SMALL) {
79 efi_printk(sys_table, "Failed to get file info size\n");
80 return status;
81 }
82
83 grow:
84 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
85 info_sz, (void **)&info);
86 if (status != EFI_SUCCESS) {
87 efi_printk(sys_table, "Failed to alloc mem for file info\n");
88 return status;
89 }
90
91 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
92 &info_sz, info);
93 if (status == EFI_BUFFER_TOO_SMALL) {
94 efi_call_early(free_pool, info);
95 goto grow;
96 }
97
98 *file_sz = info->file_size;
99 efi_call_early(free_pool, info);
100
101 if (status != EFI_SUCCESS)
102 efi_printk(sys_table, "Failed to get initrd info\n");
103
104 return status;
105 }
106
107 static efi_status_t
108 __file_size64(void *__fh, efi_char16_t *filename_16,
109 void **handle, u64 *file_sz)
110 {
111 efi_file_handle_64_t *h, *fh = __fh;
112 efi_file_info_t *info;
113 efi_status_t status;
114 efi_guid_t info_guid = EFI_FILE_INFO_ID;
115 u64 info_sz;
116
117 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
118 EFI_FILE_MODE_READ, (u64)0);
119 if (status != EFI_SUCCESS) {
120 efi_printk(sys_table, "Failed to open file: ");
121 efi_char16_printk(sys_table, filename_16);
122 efi_printk(sys_table, "\n");
123 return status;
124 }
125
126 *handle = h;
127
128 info_sz = 0;
129 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
130 &info_sz, NULL);
131 if (status != EFI_BUFFER_TOO_SMALL) {
132 efi_printk(sys_table, "Failed to get file info size\n");
133 return status;
134 }
135
136 grow:
137 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
138 info_sz, (void **)&info);
139 if (status != EFI_SUCCESS) {
140 efi_printk(sys_table, "Failed to alloc mem for file info\n");
141 return status;
142 }
143
144 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
145 &info_sz, info);
146 if (status == EFI_BUFFER_TOO_SMALL) {
147 efi_call_early(free_pool, info);
148 goto grow;
149 }
150
151 *file_sz = info->file_size;
152 efi_call_early(free_pool, info);
153
154 if (status != EFI_SUCCESS)
155 efi_printk(sys_table, "Failed to get initrd info\n");
156
157 return status;
158 }
159 efi_status_t
160 efi_file_size(efi_system_table_t *sys_table, void *__fh,
161 efi_char16_t *filename_16, void **handle, u64 *file_sz)
162 {
163 if (efi_early->is64)
164 return __file_size64(__fh, filename_16, handle, file_sz);
165
166 return __file_size32(__fh, filename_16, handle, file_sz);
167 }
168
169 efi_status_t
170 efi_file_read(void *handle, unsigned long *size, void *addr)
171 {
172 unsigned long func;
173
174 if (efi_early->is64) {
175 efi_file_handle_64_t *fh = handle;
176
177 func = (unsigned long)fh->read;
178 return efi_early->call(func, handle, size, addr);
179 } else {
180 efi_file_handle_32_t *fh = handle;
181
182 func = (unsigned long)fh->read;
183 return efi_early->call(func, handle, size, addr);
184 }
185 }
186
187 efi_status_t efi_file_close(void *handle)
188 {
189 if (efi_early->is64) {
190 efi_file_handle_64_t *fh = handle;
191
192 return efi_early->call((unsigned long)fh->close, handle);
193 } else {
194 efi_file_handle_32_t *fh = handle;
195
196 return efi_early->call((unsigned long)fh->close, handle);
197 }
198 }
199
200 static inline efi_status_t __open_volume32(void *__image, void **__fh)
201 {
202 efi_file_io_interface_t *io;
203 efi_loaded_image_32_t *image = __image;
204 efi_file_handle_32_t *fh;
205 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
206 efi_status_t status;
207 void *handle = (void *)(unsigned long)image->device_handle;
208 unsigned long func;
209
210 status = efi_call_early(handle_protocol, handle,
211 &fs_proto, (void **)&io);
212 if (status != EFI_SUCCESS) {
213 efi_printk(sys_table, "Failed to handle fs_proto\n");
214 return status;
215 }
216
217 func = (unsigned long)io->open_volume;
218 status = efi_early->call(func, io, &fh);
219 if (status != EFI_SUCCESS)
220 efi_printk(sys_table, "Failed to open volume\n");
221
222 *__fh = fh;
223 return status;
224 }
225
226 static inline efi_status_t __open_volume64(void *__image, void **__fh)
227 {
228 efi_file_io_interface_t *io;
229 efi_loaded_image_64_t *image = __image;
230 efi_file_handle_64_t *fh;
231 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
232 efi_status_t status;
233 void *handle = (void *)(unsigned long)image->device_handle;
234 unsigned long func;
235
236 status = efi_call_early(handle_protocol, handle,
237 &fs_proto, (void **)&io);
238 if (status != EFI_SUCCESS) {
239 efi_printk(sys_table, "Failed to handle fs_proto\n");
240 return status;
241 }
242
243 func = (unsigned long)io->open_volume;
244 status = efi_early->call(func, io, &fh);
245 if (status != EFI_SUCCESS)
246 efi_printk(sys_table, "Failed to open volume\n");
247
248 *__fh = fh;
249 return status;
250 }
251
252 efi_status_t
253 efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
254 {
255 if (efi_early->is64)
256 return __open_volume64(__image, __fh);
257
258 return __open_volume32(__image, __fh);
259 }
260
261 void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
262 {
263 unsigned long output_string;
264 size_t offset;
265
266 if (efi_early->is64) {
267 struct efi_simple_text_output_protocol_64 *out;
268 u64 *func;
269
270 offset = offsetof(typeof(*out), output_string);
271 output_string = efi_early->text_output + offset;
272 out = (typeof(out))(unsigned long)efi_early->text_output;
273 func = (u64 *)output_string;
274
275 efi_early->call(*func, out, str);
276 } else {
277 struct efi_simple_text_output_protocol_32 *out;
278 u32 *func;
279
280 offset = offsetof(typeof(*out), output_string);
281 output_string = efi_early->text_output + offset;
282 out = (typeof(out))(unsigned long)efi_early->text_output;
283 func = (u32 *)output_string;
284
285 efi_early->call(*func, out, str);
286 }
287 }
288
289 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
290 {
291 u8 first, len;
292
293 first = 0;
294 len = 0;
295
296 if (mask) {
297 while (!(mask & 0x1)) {
298 mask = mask >> 1;
299 first++;
300 }
301
302 while (mask & 0x1) {
303 mask = mask >> 1;
304 len++;
305 }
306 }
307
308 *pos = first;
309 *size = len;
310 }
311
312 static efi_status_t
313 __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
314 {
315 struct pci_setup_rom *rom = NULL;
316 efi_status_t status;
317 unsigned long size;
318 uint64_t attributes;
319
320 status = efi_early->call(pci->attributes, pci,
321 EfiPciIoAttributeOperationGet, 0, 0,
322 &attributes);
323 if (status != EFI_SUCCESS)
324 return status;
325
326 if (!pci->romimage || !pci->romsize)
327 return EFI_INVALID_PARAMETER;
328
329 size = pci->romsize + sizeof(*rom);
330
331 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
332 if (status != EFI_SUCCESS) {
333 efi_printk(sys_table, "Failed to alloc mem for rom\n");
334 return status;
335 }
336
337 memset(rom, 0, sizeof(*rom));
338
339 rom->data.type = SETUP_PCI;
340 rom->data.len = size - sizeof(struct setup_data);
341 rom->data.next = 0;
342 rom->pcilen = pci->romsize;
343 *__rom = rom;
344
345 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
346 PCI_VENDOR_ID, 1, &(rom->vendor));
347
348 if (status != EFI_SUCCESS) {
349 efi_printk(sys_table, "Failed to read rom->vendor\n");
350 goto free_struct;
351 }
352
353 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
354 PCI_DEVICE_ID, 1, &(rom->devid));
355
356 if (status != EFI_SUCCESS) {
357 efi_printk(sys_table, "Failed to read rom->devid\n");
358 goto free_struct;
359 }
360
361 status = efi_early->call(pci->get_location, pci, &(rom->segment),
362 &(rom->bus), &(rom->device), &(rom->function));
363
364 if (status != EFI_SUCCESS)
365 goto free_struct;
366
367 memcpy(rom->romdata, pci->romimage, pci->romsize);
368 return status;
369
370 free_struct:
371 efi_call_early(free_pool, rom);
372 return status;
373 }
374
375 static void
376 setup_efi_pci32(struct boot_params *params, void **pci_handle,
377 unsigned long size)
378 {
379 efi_pci_io_protocol_32 *pci = NULL;
380 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
381 u32 *handles = (u32 *)(unsigned long)pci_handle;
382 efi_status_t status;
383 unsigned long nr_pci;
384 struct setup_data *data;
385 int i;
386
387 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
388
389 while (data && data->next)
390 data = (struct setup_data *)(unsigned long)data->next;
391
392 nr_pci = size / sizeof(u32);
393 for (i = 0; i < nr_pci; i++) {
394 struct pci_setup_rom *rom = NULL;
395 u32 h = handles[i];
396
397 status = efi_call_early(handle_protocol, h,
398 &pci_proto, (void **)&pci);
399
400 if (status != EFI_SUCCESS)
401 continue;
402
403 if (!pci)
404 continue;
405
406 status = __setup_efi_pci32(pci, &rom);
407 if (status != EFI_SUCCESS)
408 continue;
409
410 if (data)
411 data->next = (unsigned long)rom;
412 else
413 params->hdr.setup_data = (unsigned long)rom;
414
415 data = (struct setup_data *)rom;
416
417 }
418 }
419
420 static efi_status_t
421 __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
422 {
423 struct pci_setup_rom *rom;
424 efi_status_t status;
425 unsigned long size;
426 uint64_t attributes;
427
428 status = efi_early->call(pci->attributes, pci,
429 EfiPciIoAttributeOperationGet, 0,
430 &attributes);
431 if (status != EFI_SUCCESS)
432 return status;
433
434 if (!pci->romimage || !pci->romsize)
435 return EFI_INVALID_PARAMETER;
436
437 size = pci->romsize + sizeof(*rom);
438
439 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
440 if (status != EFI_SUCCESS) {
441 efi_printk(sys_table, "Failed to alloc mem for rom\n");
442 return status;
443 }
444
445 rom->data.type = SETUP_PCI;
446 rom->data.len = size - sizeof(struct setup_data);
447 rom->data.next = 0;
448 rom->pcilen = pci->romsize;
449 *__rom = rom;
450
451 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
452 PCI_VENDOR_ID, 1, &(rom->vendor));
453
454 if (status != EFI_SUCCESS) {
455 efi_printk(sys_table, "Failed to read rom->vendor\n");
456 goto free_struct;
457 }
458
459 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
460 PCI_DEVICE_ID, 1, &(rom->devid));
461
462 if (status != EFI_SUCCESS) {
463 efi_printk(sys_table, "Failed to read rom->devid\n");
464 goto free_struct;
465 }
466
467 status = efi_early->call(pci->get_location, pci, &(rom->segment),
468 &(rom->bus), &(rom->device), &(rom->function));
469
470 if (status != EFI_SUCCESS)
471 goto free_struct;
472
473 memcpy(rom->romdata, pci->romimage, pci->romsize);
474 return status;
475
476 free_struct:
477 efi_call_early(free_pool, rom);
478 return status;
479
480 }
481
482 static void
483 setup_efi_pci64(struct boot_params *params, void **pci_handle,
484 unsigned long size)
485 {
486 efi_pci_io_protocol_64 *pci = NULL;
487 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
488 u64 *handles = (u64 *)(unsigned long)pci_handle;
489 efi_status_t status;
490 unsigned long nr_pci;
491 struct setup_data *data;
492 int i;
493
494 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
495
496 while (data && data->next)
497 data = (struct setup_data *)(unsigned long)data->next;
498
499 nr_pci = size / sizeof(u64);
500 for (i = 0; i < nr_pci; i++) {
501 struct pci_setup_rom *rom = NULL;
502 u64 h = handles[i];
503
504 status = efi_call_early(handle_protocol, h,
505 &pci_proto, (void **)&pci);
506
507 if (status != EFI_SUCCESS)
508 continue;
509
510 if (!pci)
511 continue;
512
513 status = __setup_efi_pci64(pci, &rom);
514 if (status != EFI_SUCCESS)
515 continue;
516
517 if (data)
518 data->next = (unsigned long)rom;
519 else
520 params->hdr.setup_data = (unsigned long)rom;
521
522 data = (struct setup_data *)rom;
523
524 }
525 }
526
527 /*
528 * There's no way to return an informative status from this function,
529 * because any analysis (and printing of error messages) needs to be
530 * done directly at the EFI function call-site.
531 *
532 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
533 * just didn't find any PCI devices, but there's no way to tell outside
534 * the context of the call.
535 */
536 static void setup_efi_pci(struct boot_params *params)
537 {
538 efi_status_t status;
539 void **pci_handle = NULL;
540 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
541 unsigned long size = 0;
542
543 status = efi_call_early(locate_handle,
544 EFI_LOCATE_BY_PROTOCOL,
545 &pci_proto, NULL, &size, pci_handle);
546
547 if (status == EFI_BUFFER_TOO_SMALL) {
548 status = efi_call_early(allocate_pool,
549 EFI_LOADER_DATA,
550 size, (void **)&pci_handle);
551
552 if (status != EFI_SUCCESS) {
553 efi_printk(sys_table, "Failed to alloc mem for pci_handle\n");
554 return;
555 }
556
557 status = efi_call_early(locate_handle,
558 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
559 NULL, &size, pci_handle);
560 }
561
562 if (status != EFI_SUCCESS)
563 goto free_handle;
564
565 if (efi_early->is64)
566 setup_efi_pci64(params, pci_handle, size);
567 else
568 setup_efi_pci32(params, pci_handle, size);
569
570 free_handle:
571 efi_call_early(free_pool, pci_handle);
572 }
573
574 static efi_status_t
575 setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
576 {
577 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
578 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
579 unsigned long nr_ugas;
580 u32 *handles = (u32 *)uga_handle;;
581 efi_status_t status;
582 int i;
583
584 first_uga = NULL;
585 nr_ugas = size / sizeof(u32);
586 for (i = 0; i < nr_ugas; i++) {
587 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
588 u32 w, h, depth, refresh;
589 void *pciio;
590 u32 handle = handles[i];
591
592 status = efi_call_early(handle_protocol, handle,
593 &uga_proto, (void **)&uga);
594 if (status != EFI_SUCCESS)
595 continue;
596
597 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
598
599 status = efi_early->call((unsigned long)uga->get_mode, uga,
600 &w, &h, &depth, &refresh);
601 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
602 *width = w;
603 *height = h;
604
605 /*
606 * Once we've found a UGA supporting PCIIO,
607 * don't bother looking any further.
608 */
609 if (pciio)
610 break;
611
612 first_uga = uga;
613 }
614 }
615
616 return status;
617 }
618
619 static efi_status_t
620 setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
621 {
622 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
623 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
624 unsigned long nr_ugas;
625 u64 *handles = (u64 *)uga_handle;;
626 efi_status_t status;
627 int i;
628
629 first_uga = NULL;
630 nr_ugas = size / sizeof(u64);
631 for (i = 0; i < nr_ugas; i++) {
632 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
633 u32 w, h, depth, refresh;
634 void *pciio;
635 u64 handle = handles[i];
636
637 status = efi_call_early(handle_protocol, handle,
638 &uga_proto, (void **)&uga);
639 if (status != EFI_SUCCESS)
640 continue;
641
642 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
643
644 status = efi_early->call((unsigned long)uga->get_mode, uga,
645 &w, &h, &depth, &refresh);
646 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
647 *width = w;
648 *height = h;
649
650 /*
651 * Once we've found a UGA supporting PCIIO,
652 * don't bother looking any further.
653 */
654 if (pciio)
655 break;
656
657 first_uga = uga;
658 }
659 }
660
661 return status;
662 }
663
664 /*
665 * See if we have Universal Graphics Adapter (UGA) protocol
666 */
667 static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
668 unsigned long size)
669 {
670 efi_status_t status;
671 u32 width, height;
672 void **uga_handle = NULL;
673
674 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
675 size, (void **)&uga_handle);
676 if (status != EFI_SUCCESS)
677 return status;
678
679 status = efi_call_early(locate_handle,
680 EFI_LOCATE_BY_PROTOCOL,
681 uga_proto, NULL, &size, uga_handle);
682 if (status != EFI_SUCCESS)
683 goto free_handle;
684
685 height = 0;
686 width = 0;
687
688 if (efi_early->is64)
689 status = setup_uga64(uga_handle, size, &width, &height);
690 else
691 status = setup_uga32(uga_handle, size, &width, &height);
692
693 if (!width && !height)
694 goto free_handle;
695
696 /* EFI framebuffer */
697 si->orig_video_isVGA = VIDEO_TYPE_EFI;
698
699 si->lfb_depth = 32;
700 si->lfb_width = width;
701 si->lfb_height = height;
702
703 si->red_size = 8;
704 si->red_pos = 16;
705 si->green_size = 8;
706 si->green_pos = 8;
707 si->blue_size = 8;
708 si->blue_pos = 0;
709 si->rsvd_size = 8;
710 si->rsvd_pos = 24;
711
712 free_handle:
713 efi_call_early(free_pool, uga_handle);
714 return status;
715 }
716
717 void setup_graphics(struct boot_params *boot_params)
718 {
719 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
720 struct screen_info *si;
721 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
722 efi_status_t status;
723 unsigned long size;
724 void **gop_handle = NULL;
725 void **uga_handle = NULL;
726
727 si = &boot_params->screen_info;
728 memset(si, 0, sizeof(*si));
729
730 size = 0;
731 status = efi_call_early(locate_handle,
732 EFI_LOCATE_BY_PROTOCOL,
733 &graphics_proto, NULL, &size, gop_handle);
734 if (status == EFI_BUFFER_TOO_SMALL)
735 status = efi_setup_gop(NULL, si, &graphics_proto, size);
736
737 if (status != EFI_SUCCESS) {
738 size = 0;
739 status = efi_call_early(locate_handle,
740 EFI_LOCATE_BY_PROTOCOL,
741 &uga_proto, NULL, &size, uga_handle);
742 if (status == EFI_BUFFER_TOO_SMALL)
743 setup_uga(si, &uga_proto, size);
744 }
745 }
746
747 /*
748 * Because the x86 boot code expects to be passed a boot_params we
749 * need to create one ourselves (usually the bootloader would create
750 * one for us).
751 *
752 * The caller is responsible for filling out ->code32_start in the
753 * returned boot_params.
754 */
755 struct boot_params *make_boot_params(struct efi_config *c)
756 {
757 struct boot_params *boot_params;
758 struct apm_bios_info *bi;
759 struct setup_header *hdr;
760 efi_loaded_image_t *image;
761 void *options, *handle;
762 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
763 int options_size = 0;
764 efi_status_t status;
765 char *cmdline_ptr;
766 u16 *s2;
767 u8 *s1;
768 int i;
769 unsigned long ramdisk_addr;
770 unsigned long ramdisk_size;
771
772 efi_early = c;
773 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
774 handle = (void *)(unsigned long)efi_early->image_handle;
775
776 /* Check if we were booted by the EFI firmware */
777 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
778 return NULL;
779
780 if (efi_early->is64)
781 setup_boot_services64(efi_early);
782 else
783 setup_boot_services32(efi_early);
784
785 status = efi_call_early(handle_protocol, handle,
786 &proto, (void *)&image);
787 if (status != EFI_SUCCESS) {
788 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
789 return NULL;
790 }
791
792 status = efi_low_alloc(sys_table, 0x4000, 1,
793 (unsigned long *)&boot_params);
794 if (status != EFI_SUCCESS) {
795 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
796 return NULL;
797 }
798
799 memset(boot_params, 0x0, 0x4000);
800
801 hdr = &boot_params->hdr;
802 bi = &boot_params->apm_bios_info;
803
804 /* Copy the second sector to boot_params */
805 memcpy(&hdr->jump, image->image_base + 512, 512);
806
807 /*
808 * Fill out some of the header fields ourselves because the
809 * EFI firmware loader doesn't load the first sector.
810 */
811 hdr->root_flags = 1;
812 hdr->vid_mode = 0xffff;
813 hdr->boot_flag = 0xAA55;
814
815 hdr->type_of_loader = 0x21;
816
817 /* Convert unicode cmdline to ascii */
818 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
819 if (!cmdline_ptr)
820 goto fail;
821 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
822 /* Fill in upper bits of command line address, NOP on 32 bit */
823 boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
824
825 hdr->ramdisk_image = 0;
826 hdr->ramdisk_size = 0;
827
828 /* Clear APM BIOS info */
829 memset(bi, 0, sizeof(*bi));
830
831 status = efi_parse_options(cmdline_ptr);
832 if (status != EFI_SUCCESS)
833 goto fail2;
834
835 status = handle_cmdline_files(sys_table, image,
836 (char *)(unsigned long)hdr->cmd_line_ptr,
837 "initrd=", hdr->initrd_addr_max,
838 &ramdisk_addr, &ramdisk_size);
839
840 if (status != EFI_SUCCESS &&
841 hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
842 efi_printk(sys_table, "Trying to load files to higher address\n");
843 status = handle_cmdline_files(sys_table, image,
844 (char *)(unsigned long)hdr->cmd_line_ptr,
845 "initrd=", -1UL,
846 &ramdisk_addr, &ramdisk_size);
847 }
848
849 if (status != EFI_SUCCESS)
850 goto fail2;
851 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
852 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
853 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
854 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
855
856 return boot_params;
857 fail2:
858 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
859 fail:
860 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
861 return NULL;
862 }
863
864 static void add_e820ext(struct boot_params *params,
865 struct setup_data *e820ext, u32 nr_entries)
866 {
867 struct setup_data *data;
868 efi_status_t status;
869 unsigned long size;
870
871 e820ext->type = SETUP_E820_EXT;
872 e820ext->len = nr_entries * sizeof(struct e820entry);
873 e820ext->next = 0;
874
875 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
876
877 while (data && data->next)
878 data = (struct setup_data *)(unsigned long)data->next;
879
880 if (data)
881 data->next = (unsigned long)e820ext;
882 else
883 params->hdr.setup_data = (unsigned long)e820ext;
884 }
885
886 static efi_status_t setup_e820(struct boot_params *params,
887 struct setup_data *e820ext, u32 e820ext_size)
888 {
889 struct e820entry *e820_map = &params->e820_map[0];
890 struct efi_info *efi = &params->efi_info;
891 struct e820entry *prev = NULL;
892 u32 nr_entries;
893 u32 nr_desc;
894 int i;
895
896 nr_entries = 0;
897 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
898
899 for (i = 0; i < nr_desc; i++) {
900 efi_memory_desc_t *d;
901 unsigned int e820_type = 0;
902 unsigned long m = efi->efi_memmap;
903
904 #ifdef CONFIG_X86_64
905 m |= (u64)efi->efi_memmap_hi << 32;
906 #endif
907
908 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
909 switch (d->type) {
910 case EFI_RESERVED_TYPE:
911 case EFI_RUNTIME_SERVICES_CODE:
912 case EFI_RUNTIME_SERVICES_DATA:
913 case EFI_MEMORY_MAPPED_IO:
914 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
915 case EFI_PAL_CODE:
916 e820_type = E820_RESERVED;
917 break;
918
919 case EFI_UNUSABLE_MEMORY:
920 e820_type = E820_UNUSABLE;
921 break;
922
923 case EFI_ACPI_RECLAIM_MEMORY:
924 e820_type = E820_ACPI;
925 break;
926
927 case EFI_LOADER_CODE:
928 case EFI_LOADER_DATA:
929 case EFI_BOOT_SERVICES_CODE:
930 case EFI_BOOT_SERVICES_DATA:
931 case EFI_CONVENTIONAL_MEMORY:
932 e820_type = E820_RAM;
933 break;
934
935 case EFI_ACPI_MEMORY_NVS:
936 e820_type = E820_NVS;
937 break;
938
939 case EFI_PERSISTENT_MEMORY:
940 e820_type = E820_PMEM;
941 break;
942
943 default:
944 continue;
945 }
946
947 /* Merge adjacent mappings */
948 if (prev && prev->type == e820_type &&
949 (prev->addr + prev->size) == d->phys_addr) {
950 prev->size += d->num_pages << 12;
951 continue;
952 }
953
954 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
955 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
956 sizeof(struct setup_data);
957
958 if (!e820ext || e820ext_size < need)
959 return EFI_BUFFER_TOO_SMALL;
960
961 /* boot_params map full, switch to e820 extended */
962 e820_map = (struct e820entry *)e820ext->data;
963 }
964
965 e820_map->addr = d->phys_addr;
966 e820_map->size = d->num_pages << PAGE_SHIFT;
967 e820_map->type = e820_type;
968 prev = e820_map++;
969 nr_entries++;
970 }
971
972 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
973 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
974
975 add_e820ext(params, e820ext, nr_e820ext);
976 nr_entries -= nr_e820ext;
977 }
978
979 params->e820_entries = (u8)nr_entries;
980
981 return EFI_SUCCESS;
982 }
983
984 static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
985 u32 *e820ext_size)
986 {
987 efi_status_t status;
988 unsigned long size;
989
990 size = sizeof(struct setup_data) +
991 sizeof(struct e820entry) * nr_desc;
992
993 if (*e820ext) {
994 efi_call_early(free_pool, *e820ext);
995 *e820ext = NULL;
996 *e820ext_size = 0;
997 }
998
999 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1000 size, (void **)e820ext);
1001 if (status == EFI_SUCCESS)
1002 *e820ext_size = size;
1003
1004 return status;
1005 }
1006
1007 struct exit_boot_struct {
1008 struct boot_params *boot_params;
1009 struct efi_info *efi;
1010 struct setup_data *e820ext;
1011 __u32 e820ext_size;
1012 bool is64;
1013 };
1014
1015 static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg,
1016 struct efi_boot_memmap *map,
1017 void *priv)
1018 {
1019 static bool first = true;
1020 const char *signature;
1021 __u32 nr_desc;
1022 efi_status_t status;
1023 struct exit_boot_struct *p = priv;
1024
1025 if (first) {
1026 nr_desc = *map->buff_size / *map->desc_size;
1027 if (nr_desc > ARRAY_SIZE(p->boot_params->e820_map)) {
1028 u32 nr_e820ext = nr_desc -
1029 ARRAY_SIZE(p->boot_params->e820_map);
1030
1031 status = alloc_e820ext(nr_e820ext, &p->e820ext,
1032 &p->e820ext_size);
1033 if (status != EFI_SUCCESS)
1034 return status;
1035 }
1036 first = false;
1037 }
1038
1039 signature = p->is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1040 memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32));
1041
1042 p->efi->efi_systab = (unsigned long)sys_table_arg;
1043 p->efi->efi_memdesc_size = *map->desc_size;
1044 p->efi->efi_memdesc_version = *map->desc_ver;
1045 p->efi->efi_memmap = (unsigned long)*map->map;
1046 p->efi->efi_memmap_size = *map->map_size;
1047
1048 #ifdef CONFIG_X86_64
1049 p->efi->efi_systab_hi = (unsigned long)sys_table_arg >> 32;
1050 p->efi->efi_memmap_hi = (unsigned long)*map->map >> 32;
1051 #endif
1052
1053 return EFI_SUCCESS;
1054 }
1055
1056 static efi_status_t exit_boot(struct boot_params *boot_params,
1057 void *handle, bool is64)
1058 {
1059 unsigned long map_sz, key, desc_size, buff_size;
1060 efi_memory_desc_t *mem_map;
1061 struct setup_data *e820ext;
1062 __u32 e820ext_size;
1063 efi_status_t status;
1064 __u32 desc_version;
1065 struct efi_boot_memmap map;
1066 struct exit_boot_struct priv;
1067
1068 map.map = &mem_map;
1069 map.map_size = &map_sz;
1070 map.desc_size = &desc_size;
1071 map.desc_ver = &desc_version;
1072 map.key_ptr = &key;
1073 map.buff_size = &buff_size;
1074 priv.boot_params = boot_params;
1075 priv.efi = &boot_params->efi_info;
1076 priv.e820ext = NULL;
1077 priv.e820ext_size = 0;
1078 priv.is64 = is64;
1079
1080 /* Might as well exit boot services now */
1081 status = efi_exit_boot_services(sys_table, handle, &map, &priv,
1082 exit_boot_func);
1083 if (status != EFI_SUCCESS)
1084 return status;
1085
1086 e820ext = priv.e820ext;
1087 e820ext_size = priv.e820ext_size;
1088 /* Historic? */
1089 boot_params->alt_mem_k = 32 * 1024;
1090
1091 status = setup_e820(boot_params, e820ext, e820ext_size);
1092 if (status != EFI_SUCCESS)
1093 return status;
1094
1095 return EFI_SUCCESS;
1096 }
1097
1098 /*
1099 * On success we return a pointer to a boot_params structure, and NULL
1100 * on failure.
1101 */
1102 struct boot_params *efi_main(struct efi_config *c,
1103 struct boot_params *boot_params)
1104 {
1105 struct desc_ptr *gdt = NULL;
1106 efi_loaded_image_t *image;
1107 struct setup_header *hdr = &boot_params->hdr;
1108 efi_status_t status;
1109 struct desc_struct *desc;
1110 void *handle;
1111 efi_system_table_t *_table;
1112 bool is64;
1113
1114 efi_early = c;
1115
1116 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1117 handle = (void *)(unsigned long)efi_early->image_handle;
1118 is64 = efi_early->is64;
1119
1120 sys_table = _table;
1121
1122 /* Check if we were booted by the EFI firmware */
1123 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1124 goto fail;
1125
1126 if (is64)
1127 setup_boot_services64(efi_early);
1128 else
1129 setup_boot_services32(efi_early);
1130
1131 setup_graphics(boot_params);
1132
1133 setup_efi_pci(boot_params);
1134
1135 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1136 sizeof(*gdt), (void **)&gdt);
1137 if (status != EFI_SUCCESS) {
1138 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1139 goto fail;
1140 }
1141
1142 gdt->size = 0x800;
1143 status = efi_low_alloc(sys_table, gdt->size, 8,
1144 (unsigned long *)&gdt->address);
1145 if (status != EFI_SUCCESS) {
1146 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1147 goto fail;
1148 }
1149
1150 /*
1151 * If the kernel isn't already loaded at the preferred load
1152 * address, relocate it.
1153 */
1154 if (hdr->pref_address != hdr->code32_start) {
1155 unsigned long bzimage_addr = hdr->code32_start;
1156 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1157 hdr->init_size, hdr->init_size,
1158 hdr->pref_address,
1159 hdr->kernel_alignment);
1160 if (status != EFI_SUCCESS) {
1161 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
1162 goto fail;
1163 }
1164
1165 hdr->pref_address = hdr->code32_start;
1166 hdr->code32_start = bzimage_addr;
1167 }
1168
1169 status = exit_boot(boot_params, handle, is64);
1170 if (status != EFI_SUCCESS) {
1171 efi_printk(sys_table, "exit_boot() failed!\n");
1172 goto fail;
1173 }
1174
1175 memset((char *)gdt->address, 0x0, gdt->size);
1176 desc = (struct desc_struct *)gdt->address;
1177
1178 /* The first GDT is a dummy and the second is unused. */
1179 desc += 2;
1180
1181 desc->limit0 = 0xffff;
1182 desc->base0 = 0x0000;
1183 desc->base1 = 0x0000;
1184 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1185 desc->s = DESC_TYPE_CODE_DATA;
1186 desc->dpl = 0;
1187 desc->p = 1;
1188 desc->limit = 0xf;
1189 desc->avl = 0;
1190 desc->l = 0;
1191 desc->d = SEG_OP_SIZE_32BIT;
1192 desc->g = SEG_GRANULARITY_4KB;
1193 desc->base2 = 0x00;
1194
1195 desc++;
1196 desc->limit0 = 0xffff;
1197 desc->base0 = 0x0000;
1198 desc->base1 = 0x0000;
1199 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1200 desc->s = DESC_TYPE_CODE_DATA;
1201 desc->dpl = 0;
1202 desc->p = 1;
1203 desc->limit = 0xf;
1204 desc->avl = 0;
1205 desc->l = 0;
1206 desc->d = SEG_OP_SIZE_32BIT;
1207 desc->g = SEG_GRANULARITY_4KB;
1208 desc->base2 = 0x00;
1209
1210 #ifdef CONFIG_X86_64
1211 /* Task segment value */
1212 desc++;
1213 desc->limit0 = 0x0000;
1214 desc->base0 = 0x0000;
1215 desc->base1 = 0x0000;
1216 desc->type = SEG_TYPE_TSS;
1217 desc->s = 0;
1218 desc->dpl = 0;
1219 desc->p = 1;
1220 desc->limit = 0x0;
1221 desc->avl = 0;
1222 desc->l = 0;
1223 desc->d = 0;
1224 desc->g = SEG_GRANULARITY_4KB;
1225 desc->base2 = 0x00;
1226 #endif /* CONFIG_X86_64 */
1227
1228 asm volatile("cli");
1229 asm volatile ("lgdt %0" : : "m" (*gdt));
1230
1231 return boot_params;
1232 fail:
1233 efi_printk(sys_table, "efi_main() failed!\n");
1234 return NULL;
1235 }
Linux kernel - Deliverables
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