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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
[linux/fpc-iii.git] / arch / x86 / boot / compressed / eboot.c
blob52fef606bc54258b7095aa6b4b16eda8fbf16244
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 struct efi_info *efi;
761 efi_loaded_image_t *image;
762 void *options, *handle;
763 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
764 int options_size = 0;
765 efi_status_t status;
766 char *cmdline_ptr;
767 u16 *s2;
768 u8 *s1;
769 int i;
770 unsigned long ramdisk_addr;
771 unsigned long ramdisk_size;
772
773 efi_early = c;
774 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
775 handle = (void *)(unsigned long)efi_early->image_handle;
776
777 /* Check if we were booted by the EFI firmware */
778 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
779 return NULL;
780
781 if (efi_early->is64)
782 setup_boot_services64(efi_early);
783 else
784 setup_boot_services32(efi_early);
785
786 status = efi_call_early(handle_protocol, handle,
787 &proto, (void *)&image);
788 if (status != EFI_SUCCESS) {
789 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
790 return NULL;
791 }
792
793 status = efi_low_alloc(sys_table, 0x4000, 1,
794 (unsigned long *)&boot_params);
795 if (status != EFI_SUCCESS) {
796 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
797 return NULL;
798 }
799
800 memset(boot_params, 0x0, 0x4000);
801
802 hdr = &boot_params->hdr;
803 efi = &boot_params->efi_info;
804 bi = &boot_params->apm_bios_info;
805
806 /* Copy the second sector to boot_params */
807 memcpy(&hdr->jump, image->image_base + 512, 512);
808
809 /*
810 * Fill out some of the header fields ourselves because the
811 * EFI firmware loader doesn't load the first sector.
812 */
813 hdr->root_flags = 1;
814 hdr->vid_mode = 0xffff;
815 hdr->boot_flag = 0xAA55;
816
817 hdr->type_of_loader = 0x21;
818
819 /* Convert unicode cmdline to ascii */
820 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
821 if (!cmdline_ptr)
822 goto fail;
823 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
824 /* Fill in upper bits of command line address, NOP on 32 bit */
825 boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
826
827 hdr->ramdisk_image = 0;
828 hdr->ramdisk_size = 0;
829
830 /* Clear APM BIOS info */
831 memset(bi, 0, sizeof(*bi));
832
833 status = efi_parse_options(cmdline_ptr);
834 if (status != EFI_SUCCESS)
835 goto fail2;
836
837 status = handle_cmdline_files(sys_table, image,
838 (char *)(unsigned long)hdr->cmd_line_ptr,
839 "initrd=", hdr->initrd_addr_max,
840 &ramdisk_addr, &ramdisk_size);
841
842 if (status != EFI_SUCCESS &&
843 hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
844 efi_printk(sys_table, "Trying to load files to higher address\n");
845 status = handle_cmdline_files(sys_table, image,
846 (char *)(unsigned long)hdr->cmd_line_ptr,
847 "initrd=", -1UL,
848 &ramdisk_addr, &ramdisk_size);
849 }
850
851 if (status != EFI_SUCCESS)
852 goto fail2;
853 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
854 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
855 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
856 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
857
858 return boot_params;
859 fail2:
860 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
861 fail:
862 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
863 return NULL;
864 }
865
866 static void add_e820ext(struct boot_params *params,
867 struct setup_data *e820ext, u32 nr_entries)
868 {
869 struct setup_data *data;
870 efi_status_t status;
871 unsigned long size;
872
873 e820ext->type = SETUP_E820_EXT;
874 e820ext->len = nr_entries * sizeof(struct e820entry);
875 e820ext->next = 0;
876
877 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
878
879 while (data && data->next)
880 data = (struct setup_data *)(unsigned long)data->next;
881
882 if (data)
883 data->next = (unsigned long)e820ext;
884 else
885 params->hdr.setup_data = (unsigned long)e820ext;
886 }
887
888 static efi_status_t setup_e820(struct boot_params *params,
889 struct setup_data *e820ext, u32 e820ext_size)
890 {
891 struct e820entry *e820_map = &params->e820_map[0];
892 struct efi_info *efi = &params->efi_info;
893 struct e820entry *prev = NULL;
894 u32 nr_entries;
895 u32 nr_desc;
896 int i;
897
898 nr_entries = 0;
899 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
900
901 for (i = 0; i < nr_desc; i++) {
902 efi_memory_desc_t *d;
903 unsigned int e820_type = 0;
904 unsigned long m = efi->efi_memmap;
905
906 #ifdef CONFIG_X86_64
907 m |= (u64)efi->efi_memmap_hi << 32;
908 #endif
909
910 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
911 switch (d->type) {
912 case EFI_RESERVED_TYPE:
913 case EFI_RUNTIME_SERVICES_CODE:
914 case EFI_RUNTIME_SERVICES_DATA:
915 case EFI_MEMORY_MAPPED_IO:
916 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
917 case EFI_PAL_CODE:
918 e820_type = E820_RESERVED;
919 break;
920
921 case EFI_UNUSABLE_MEMORY:
922 e820_type = E820_UNUSABLE;
923 break;
924
925 case EFI_ACPI_RECLAIM_MEMORY:
926 e820_type = E820_ACPI;
927 break;
928
929 case EFI_LOADER_CODE:
930 case EFI_LOADER_DATA:
931 case EFI_BOOT_SERVICES_CODE:
932 case EFI_BOOT_SERVICES_DATA:
933 case EFI_CONVENTIONAL_MEMORY:
934 e820_type = E820_RAM;
935 break;
936
937 case EFI_ACPI_MEMORY_NVS:
938 e820_type = E820_NVS;
939 break;
940
941 case EFI_PERSISTENT_MEMORY:
942 e820_type = E820_PMEM;
943 break;
944
945 default:
946 continue;
947 }
948
949 /* Merge adjacent mappings */
950 if (prev && prev->type == e820_type &&
951 (prev->addr + prev->size) == d->phys_addr) {
952 prev->size += d->num_pages << 12;
953 continue;
954 }
955
956 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
957 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
958 sizeof(struct setup_data);
959
960 if (!e820ext || e820ext_size < need)
961 return EFI_BUFFER_TOO_SMALL;
962
963 /* boot_params map full, switch to e820 extended */
964 e820_map = (struct e820entry *)e820ext->data;
965 }
966
967 e820_map->addr = d->phys_addr;
968 e820_map->size = d->num_pages << PAGE_SHIFT;
969 e820_map->type = e820_type;
970 prev = e820_map++;
971 nr_entries++;
972 }
973
974 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
975 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
976
977 add_e820ext(params, e820ext, nr_e820ext);
978 nr_entries -= nr_e820ext;
979 }
980
981 params->e820_entries = (u8)nr_entries;
982
983 return EFI_SUCCESS;
984 }
985
986 static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
987 u32 *e820ext_size)
988 {
989 efi_status_t status;
990 unsigned long size;
991
992 size = sizeof(struct setup_data) +
993 sizeof(struct e820entry) * nr_desc;
994
995 if (*e820ext) {
996 efi_call_early(free_pool, *e820ext);
997 *e820ext = NULL;
998 *e820ext_size = 0;
999 }
1000
1001 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1002 size, (void **)e820ext);
1003 if (status == EFI_SUCCESS)
1004 *e820ext_size = size;
1005
1006 return status;
1007 }
1008
1009 static efi_status_t exit_boot(struct boot_params *boot_params,
1010 void *handle, bool is64)
1011 {
1012 struct efi_info *efi = &boot_params->efi_info;
1013 unsigned long map_sz, key, desc_size;
1014 efi_memory_desc_t *mem_map;
1015 struct setup_data *e820ext;
1016 const char *signature;
1017 __u32 e820ext_size;
1018 __u32 nr_desc, prev_nr_desc;
1019 efi_status_t status;
1020 __u32 desc_version;
1021 bool called_exit = false;
1022 u8 nr_entries;
1023 int i;
1024
1025 nr_desc = 0;
1026 e820ext = NULL;
1027 e820ext_size = 0;
1028
1029 get_map:
1030 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1031 &desc_version, &key);
1032
1033 if (status != EFI_SUCCESS)
1034 return status;
1035
1036 prev_nr_desc = nr_desc;
1037 nr_desc = map_sz / desc_size;
1038 if (nr_desc > prev_nr_desc &&
1039 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1040 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1041
1042 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1043 if (status != EFI_SUCCESS)
1044 goto free_mem_map;
1045
1046 efi_call_early(free_pool, mem_map);
1047 goto get_map; /* Allocated memory, get map again */
1048 }
1049
1050 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1051 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1052
1053 efi->efi_systab = (unsigned long)sys_table;
1054 efi->efi_memdesc_size = desc_size;
1055 efi->efi_memdesc_version = desc_version;
1056 efi->efi_memmap = (unsigned long)mem_map;
1057 efi->efi_memmap_size = map_sz;
1058
1059 #ifdef CONFIG_X86_64
1060 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1061 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1062 #endif
1063
1064 /* Might as well exit boot services now */
1065 status = efi_call_early(exit_boot_services, handle, key);
1066 if (status != EFI_SUCCESS) {
1067 /*
1068 * ExitBootServices() will fail if any of the event
1069 * handlers change the memory map. In which case, we
1070 * must be prepared to retry, but only once so that
1071 * we're guaranteed to exit on repeated failures instead
1072 * of spinning forever.
1073 */
1074 if (called_exit)
1075 goto free_mem_map;
1076
1077 called_exit = true;
1078 efi_call_early(free_pool, mem_map);
1079 goto get_map;
1080 }
1081
1082 /* Historic? */
1083 boot_params->alt_mem_k = 32 * 1024;
1084
1085 status = setup_e820(boot_params, e820ext, e820ext_size);
1086 if (status != EFI_SUCCESS)
1087 return status;
1088
1089 return EFI_SUCCESS;
1090
1091 free_mem_map:
1092 efi_call_early(free_pool, mem_map);
1093 return status;
1094 }
1095
1096 /*
1097 * On success we return a pointer to a boot_params structure, and NULL
1098 * on failure.
1099 */
1100 struct boot_params *efi_main(struct efi_config *c,
1101 struct boot_params *boot_params)
1102 {
1103 struct desc_ptr *gdt = NULL;
1104 efi_loaded_image_t *image;
1105 struct setup_header *hdr = &boot_params->hdr;
1106 efi_status_t status;
1107 struct desc_struct *desc;
1108 void *handle;
1109 efi_system_table_t *_table;
1110 bool is64;
1111
1112 efi_early = c;
1113
1114 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1115 handle = (void *)(unsigned long)efi_early->image_handle;
1116 is64 = efi_early->is64;
1117
1118 sys_table = _table;
1119
1120 /* Check if we were booted by the EFI firmware */
1121 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1122 goto fail;
1123
1124 if (is64)
1125 setup_boot_services64(efi_early);
1126 else
1127 setup_boot_services32(efi_early);
1128
1129 setup_graphics(boot_params);
1130
1131 setup_efi_pci(boot_params);
1132
1133 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1134 sizeof(*gdt), (void **)&gdt);
1135 if (status != EFI_SUCCESS) {
1136 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1137 goto fail;
1138 }
1139
1140 gdt->size = 0x800;
1141 status = efi_low_alloc(sys_table, gdt->size, 8,
1142 (unsigned long *)&gdt->address);
1143 if (status != EFI_SUCCESS) {
1144 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1145 goto fail;
1146 }
1147
1148 /*
1149 * If the kernel isn't already loaded at the preferred load
1150 * address, relocate it.
1151 */
1152 if (hdr->pref_address != hdr->code32_start) {
1153 unsigned long bzimage_addr = hdr->code32_start;
1154 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1155 hdr->init_size, hdr->init_size,
1156 hdr->pref_address,
1157 hdr->kernel_alignment);
1158 if (status != EFI_SUCCESS) {
1159 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
1160 goto fail;
1161 }
1162
1163 hdr->pref_address = hdr->code32_start;
1164 hdr->code32_start = bzimage_addr;
1165 }
1166
1167 status = exit_boot(boot_params, handle, is64);
1168 if (status != EFI_SUCCESS) {
1169 efi_printk(sys_table, "exit_boot() failed!\n");
1170 goto fail;
1171 }
1172
1173 memset((char *)gdt->address, 0x0, gdt->size);
1174 desc = (struct desc_struct *)gdt->address;
1175
1176 /* The first GDT is a dummy and the second is unused. */
1177 desc += 2;
1178
1179 desc->limit0 = 0xffff;
1180 desc->base0 = 0x0000;
1181 desc->base1 = 0x0000;
1182 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1183 desc->s = DESC_TYPE_CODE_DATA;
1184 desc->dpl = 0;
1185 desc->p = 1;
1186 desc->limit = 0xf;
1187 desc->avl = 0;
1188 desc->l = 0;
1189 desc->d = SEG_OP_SIZE_32BIT;
1190 desc->g = SEG_GRANULARITY_4KB;
1191 desc->base2 = 0x00;
1192
1193 desc++;
1194 desc->limit0 = 0xffff;
1195 desc->base0 = 0x0000;
1196 desc->base1 = 0x0000;
1197 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1198 desc->s = DESC_TYPE_CODE_DATA;
1199 desc->dpl = 0;
1200 desc->p = 1;
1201 desc->limit = 0xf;
1202 desc->avl = 0;
1203 desc->l = 0;
1204 desc->d = SEG_OP_SIZE_32BIT;
1205 desc->g = SEG_GRANULARITY_4KB;
1206 desc->base2 = 0x00;
1207
1208 #ifdef CONFIG_X86_64
1209 /* Task segment value */
1210 desc++;
1211 desc->limit0 = 0x0000;
1212 desc->base0 = 0x0000;
1213 desc->base1 = 0x0000;
1214 desc->type = SEG_TYPE_TSS;
1215 desc->s = 0;
1216 desc->dpl = 0;
1217 desc->p = 1;
1218 desc->limit = 0x0;
1219 desc->avl = 0;
1220 desc->l = 0;
1221 desc->d = 0;
1222 desc->g = SEG_GRANULARITY_4KB;
1223 desc->base2 = 0x00;
1224 #endif /* CONFIG_X86_64 */
1225
1226 asm volatile("cli");
1227 asm volatile ("lgdt %0" : : "m" (*gdt));
1228
1229 return boot_params;
1230 fail:
1231 efi_printk(sys_table, "efi_main() failed!\n");
1232 return NULL;
1233 }
Linux with added FPC-III support