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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
20static efi_system_table_t *sys_table;
21
22static struct efi_config *efi_early;
23
24#define efi_call_early(f, ...) \
25 efi_early->call(efi_early->f, __VA_ARGS__);
26
27#define BOOT_SERVICES(bits) \
28static void setup_boot_services##bits(struct efi_config *c) \
29{ \
30 efi_system_table_##bits##_t *table; \
31 efi_boot_services_##bits##_t *bt; \
32 \
33 table = (typeof(table))sys_table; \
34 \
35 c->text_output = table->con_out; \
36 \
37 bt = (typeof(bt))(unsigned long)(table->boottime); \
38 \
39 c->allocate_pool = bt->allocate_pool; \
40 c->allocate_pages = bt->allocate_pages; \
41 c->get_memory_map = bt->get_memory_map; \
42 c->free_pool = bt->free_pool; \
43 c->free_pages = bt->free_pages; \
44 c->locate_handle = bt->locate_handle; \
45 c->handle_protocol = bt->handle_protocol; \
46 c->exit_boot_services = bt->exit_boot_services; \
47}
48BOOT_SERVICES(32);
49BOOT_SERVICES(64);
50
51static void efi_printk(efi_system_table_t *, char *);
52static void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
53
54static 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
83grow:
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
107static 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
136grow:
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}
159static efi_status_t
160efi_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
169static inline efi_status_t
170efi_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
187static inline 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
200static 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
226static 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
252static inline efi_status_t
253efi_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
261static 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 func = (u64 *)output_string;
273
274 efi_early->call(*func, efi_early->text_output, str);
275 } else {
276 struct efi_simple_text_output_protocol_32 *out;
277 u32 *func;
278
279 offset = offsetof(typeof(*out), output_string);
280 output_string = efi_early->text_output + offset;
281 func = (u32 *)output_string;
282
283 efi_early->call(*func, efi_early->text_output, str);
284 }
285}
286
287#include "../../../../drivers/firmware/efi/efi-stub-helper.c"
288
289static 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
312static 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 return status;
334
335 memset(rom, 0, sizeof(*rom));
336
337 rom->data.type = SETUP_PCI;
338 rom->data.len = size - sizeof(struct setup_data);
339 rom->data.next = 0;
340 rom->pcilen = pci->romsize;
341 *__rom = rom;
342
343 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
344 PCI_VENDOR_ID, 1, &(rom->vendor));
345
346 if (status != EFI_SUCCESS)
347 goto free_struct;
348
349 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
350 PCI_DEVICE_ID, 1, &(rom->devid));
351
352 if (status != EFI_SUCCESS)
353 goto free_struct;
354
355 status = efi_early->call(pci->get_location, pci, &(rom->segment),
356 &(rom->bus), &(rom->device), &(rom->function));
357
358 if (status != EFI_SUCCESS)
359 goto free_struct;
360
361 memcpy(rom->romdata, pci->romimage, pci->romsize);
362 return status;
363
364free_struct:
365 efi_call_early(free_pool, rom);
366 return status;
367}
368
369static efi_status_t
370setup_efi_pci32(struct boot_params *params, void **pci_handle,
371 unsigned long size)
372{
373 efi_pci_io_protocol_32 *pci = NULL;
374 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
375 u32 *handles = (u32 *)(unsigned long)pci_handle;
376 efi_status_t status;
377 unsigned long nr_pci;
378 struct setup_data *data;
379 int i;
380
381 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
382
383 while (data && data->next)
384 data = (struct setup_data *)(unsigned long)data->next;
385
386 nr_pci = size / sizeof(u32);
387 for (i = 0; i < nr_pci; i++) {
388 struct pci_setup_rom *rom = NULL;
389 u32 h = handles[i];
390
391 status = efi_call_early(handle_protocol, h,
392 &pci_proto, (void **)&pci);
393
394 if (status != EFI_SUCCESS)
395 continue;
396
397 if (!pci)
398 continue;
399
400 status = __setup_efi_pci32(pci, &rom);
401 if (status != EFI_SUCCESS)
402 continue;
403
404 if (data)
405 data->next = (unsigned long)rom;
406 else
407 params->hdr.setup_data = (unsigned long)rom;
408
409 data = (struct setup_data *)rom;
410
411 }
412
413 return status;
414}
415
416static efi_status_t
417__setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
418{
419 struct pci_setup_rom *rom;
420 efi_status_t status;
421 unsigned long size;
422 uint64_t attributes;
423
424 status = efi_early->call(pci->attributes, pci,
425 EfiPciIoAttributeOperationGet, 0,
426 &attributes);
427 if (status != EFI_SUCCESS)
428 return status;
429
430 if (!pci->romimage || !pci->romsize)
431 return EFI_INVALID_PARAMETER;
432
433 size = pci->romsize + sizeof(*rom);
434
435 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
436 if (status != EFI_SUCCESS)
437 return status;
438
439 rom->data.type = SETUP_PCI;
440 rom->data.len = size - sizeof(struct setup_data);
441 rom->data.next = 0;
442 rom->pcilen = pci->romsize;
443 *__rom = rom;
444
445 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
446 PCI_VENDOR_ID, 1, &(rom->vendor));
447
448 if (status != EFI_SUCCESS)
449 goto free_struct;
450
451 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
452 PCI_DEVICE_ID, 1, &(rom->devid));
453
454 if (status != EFI_SUCCESS)
455 goto free_struct;
456
457 status = efi_early->call(pci->get_location, pci, &(rom->segment),
458 &(rom->bus), &(rom->device), &(rom->function));
459
460 if (status != EFI_SUCCESS)
461 goto free_struct;
462
463 memcpy(rom->romdata, pci->romimage, pci->romsize);
464 return status;
465
466free_struct:
467 efi_call_early(free_pool, rom);
468 return status;
469
470}
471
472static efi_status_t
473setup_efi_pci64(struct boot_params *params, void **pci_handle,
474 unsigned long size)
475{
476 efi_pci_io_protocol_64 *pci = NULL;
477 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
478 u64 *handles = (u64 *)(unsigned long)pci_handle;
479 efi_status_t status;
480 unsigned long nr_pci;
481 struct setup_data *data;
482 int i;
483
484 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
485
486 while (data && data->next)
487 data = (struct setup_data *)(unsigned long)data->next;
488
489 nr_pci = size / sizeof(u64);
490 for (i = 0; i < nr_pci; i++) {
491 struct pci_setup_rom *rom = NULL;
492 u64 h = handles[i];
493
494 status = efi_call_early(handle_protocol, h,
495 &pci_proto, (void **)&pci);
496
497 if (status != EFI_SUCCESS)
498 continue;
499
500 if (!pci)
501 continue;
502
503 status = __setup_efi_pci64(pci, &rom);
504 if (status != EFI_SUCCESS)
505 continue;
506
507 if (data)
508 data->next = (unsigned long)rom;
509 else
510 params->hdr.setup_data = (unsigned long)rom;
511
512 data = (struct setup_data *)rom;
513
514 }
515
516 return status;
517}
518
519static efi_status_t setup_efi_pci(struct boot_params *params)
520{
521 efi_status_t status;
522 void **pci_handle = NULL;
523 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
524 unsigned long size = 0;
525
526 status = efi_call_early(locate_handle,
527 EFI_LOCATE_BY_PROTOCOL,
528 &pci_proto, NULL, &size, pci_handle);
529
530 if (status == EFI_BUFFER_TOO_SMALL) {
531 status = efi_call_early(allocate_pool,
532 EFI_LOADER_DATA,
533 size, (void **)&pci_handle);
534
535 if (status != EFI_SUCCESS)
536 return status;
537
538 status = efi_call_early(locate_handle,
539 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
540 NULL, &size, pci_handle);
541 }
542
543 if (status != EFI_SUCCESS)
544 goto free_handle;
545
546 if (efi_early->is64)
547 status = setup_efi_pci64(params, pci_handle, size);
548 else
549 status = setup_efi_pci32(params, pci_handle, size);
550
551free_handle:
552 efi_call_early(free_pool, pci_handle);
553 return status;
554}
555
556static void
557setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
558 struct efi_pixel_bitmask pixel_info, int pixel_format)
559{
560 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
561 si->lfb_depth = 32;
562 si->lfb_linelength = pixels_per_scan_line * 4;
563 si->red_size = 8;
564 si->red_pos = 0;
565 si->green_size = 8;
566 si->green_pos = 8;
567 si->blue_size = 8;
568 si->blue_pos = 16;
569 si->rsvd_size = 8;
570 si->rsvd_pos = 24;
571 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
572 si->lfb_depth = 32;
573 si->lfb_linelength = pixels_per_scan_line * 4;
574 si->red_size = 8;
575 si->red_pos = 16;
576 si->green_size = 8;
577 si->green_pos = 8;
578 si->blue_size = 8;
579 si->blue_pos = 0;
580 si->rsvd_size = 8;
581 si->rsvd_pos = 24;
582 } else if (pixel_format == PIXEL_BIT_MASK) {
583 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
584 find_bits(pixel_info.green_mask, &si->green_pos,
585 &si->green_size);
586 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
587 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
588 &si->rsvd_size);
589 si->lfb_depth = si->red_size + si->green_size +
590 si->blue_size + si->rsvd_size;
591 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
592 } else {
593 si->lfb_depth = 4;
594 si->lfb_linelength = si->lfb_width / 2;
595 si->red_size = 0;
596 si->red_pos = 0;
597 si->green_size = 0;
598 si->green_pos = 0;
599 si->blue_size = 0;
600 si->blue_pos = 0;
601 si->rsvd_size = 0;
602 si->rsvd_pos = 0;
603 }
604}
605
606static efi_status_t
607__gop_query32(struct efi_graphics_output_protocol_32 *gop32,
608 struct efi_graphics_output_mode_info **info,
609 unsigned long *size, u32 *fb_base)
610{
611 struct efi_graphics_output_protocol_mode_32 *mode;
612 efi_status_t status;
613 unsigned long m;
614
615 m = gop32->mode;
616 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
617
618 status = efi_early->call(gop32->query_mode, gop32,
619 mode->mode, size, info);
620 if (status != EFI_SUCCESS)
621 return status;
622
623 *fb_base = mode->frame_buffer_base;
624 return status;
625}
626
627static efi_status_t
628setup_gop32(struct screen_info *si, efi_guid_t *proto,
629 unsigned long size, void **gop_handle)
630{
631 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
632 unsigned long nr_gops;
633 u16 width, height;
634 u32 pixels_per_scan_line;
635 u32 fb_base;
636 struct efi_pixel_bitmask pixel_info;
637 int pixel_format;
638 efi_status_t status;
639 u32 *handles = (u32 *)(unsigned long)gop_handle;
640 int i;
641
642 first_gop = NULL;
643 gop32 = NULL;
644
645 nr_gops = size / sizeof(u32);
646 for (i = 0; i < nr_gops; i++) {
647 struct efi_graphics_output_mode_info *info = NULL;
648 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
649 bool conout_found = false;
650 void *dummy = NULL;
651 u32 h = handles[i];
652
653 status = efi_call_early(handle_protocol, h,
654 proto, (void **)&gop32);
655 if (status != EFI_SUCCESS)
656 continue;
657
658 status = efi_call_early(handle_protocol, h,
659 &conout_proto, &dummy);
660 if (status == EFI_SUCCESS)
661 conout_found = true;
662
663 status = __gop_query32(gop32, &info, &size, &fb_base);
664 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
665 /*
666 * Systems that use the UEFI Console Splitter may
667 * provide multiple GOP devices, not all of which are
668 * backed by real hardware. The workaround is to search
669 * for a GOP implementing the ConOut protocol, and if
670 * one isn't found, to just fall back to the first GOP.
671 */
672 width = info->horizontal_resolution;
673 height = info->vertical_resolution;
674 pixel_format = info->pixel_format;
675 pixel_info = info->pixel_information;
676 pixels_per_scan_line = info->pixels_per_scan_line;
677
678 /*
679 * Once we've found a GOP supporting ConOut,
680 * don't bother looking any further.
681 */
682 first_gop = gop32;
683 if (conout_found)
684 break;
685 }
686 }
687
688 /* Did we find any GOPs? */
689 if (!first_gop)
690 goto out;
691
692 /* EFI framebuffer */
693 si->orig_video_isVGA = VIDEO_TYPE_EFI;
694
695 si->lfb_width = width;
696 si->lfb_height = height;
697 si->lfb_base = fb_base;
698 si->pages = 1;
699
700 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
701
702 si->lfb_size = si->lfb_linelength * si->lfb_height;
703
704 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
705out:
706 return status;
707}
708
709static efi_status_t
710__gop_query64(struct efi_graphics_output_protocol_64 *gop64,
711 struct efi_graphics_output_mode_info **info,
712 unsigned long *size, u32 *fb_base)
713{
714 struct efi_graphics_output_protocol_mode_64 *mode;
715 efi_status_t status;
716 unsigned long m;
717
718 m = gop64->mode;
719 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
720
721 status = efi_early->call(gop64->query_mode, gop64,
722 mode->mode, size, info);
723 if (status != EFI_SUCCESS)
724 return status;
725
726 *fb_base = mode->frame_buffer_base;
727 return status;
728}
729
730static efi_status_t
731setup_gop64(struct screen_info *si, efi_guid_t *proto,
732 unsigned long size, void **gop_handle)
733{
734 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
735 unsigned long nr_gops;
736 u16 width, height;
737 u32 pixels_per_scan_line;
738 u32 fb_base;
739 struct efi_pixel_bitmask pixel_info;
740 int pixel_format;
741 efi_status_t status;
742 u64 *handles = (u64 *)(unsigned long)gop_handle;
743 int i;
744
745 first_gop = NULL;
746 gop64 = NULL;
747
748 nr_gops = size / sizeof(u64);
749 for (i = 0; i < nr_gops; i++) {
750 struct efi_graphics_output_mode_info *info = NULL;
751 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
752 bool conout_found = false;
753 void *dummy = NULL;
754 u64 h = handles[i];
755
756 status = efi_call_early(handle_protocol, h,
757 proto, (void **)&gop64);
758 if (status != EFI_SUCCESS)
759 continue;
760
761 status = efi_call_early(handle_protocol, h,
762 &conout_proto, &dummy);
763 if (status == EFI_SUCCESS)
764 conout_found = true;
765
766 status = __gop_query64(gop64, &info, &size, &fb_base);
767 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
768 /*
769 * Systems that use the UEFI Console Splitter may
770 * provide multiple GOP devices, not all of which are
771 * backed by real hardware. The workaround is to search
772 * for a GOP implementing the ConOut protocol, and if
773 * one isn't found, to just fall back to the first GOP.
774 */
775 width = info->horizontal_resolution;
776 height = info->vertical_resolution;
777 pixel_format = info->pixel_format;
778 pixel_info = info->pixel_information;
779 pixels_per_scan_line = info->pixels_per_scan_line;
780
781 /*
782 * Once we've found a GOP supporting ConOut,
783 * don't bother looking any further.
784 */
785 first_gop = gop64;
786 if (conout_found)
787 break;
788 }
789 }
790
791 /* Did we find any GOPs? */
792 if (!first_gop)
793 goto out;
794
795 /* EFI framebuffer */
796 si->orig_video_isVGA = VIDEO_TYPE_EFI;
797
798 si->lfb_width = width;
799 si->lfb_height = height;
800 si->lfb_base = fb_base;
801 si->pages = 1;
802
803 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
804
805 si->lfb_size = si->lfb_linelength * si->lfb_height;
806
807 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
808out:
809 return status;
810}
811
812/*
813 * See if we have Graphics Output Protocol
814 */
815static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
816 unsigned long size)
817{
818 efi_status_t status;
819 void **gop_handle = NULL;
820
821 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
822 size, (void **)&gop_handle);
823 if (status != EFI_SUCCESS)
824 return status;
825
826 status = efi_call_early(locate_handle,
827 EFI_LOCATE_BY_PROTOCOL,
828 proto, NULL, &size, gop_handle);
829 if (status != EFI_SUCCESS)
830 goto free_handle;
831
832 if (efi_early->is64)
833 status = setup_gop64(si, proto, size, gop_handle);
834 else
835 status = setup_gop32(si, proto, size, gop_handle);
836
837free_handle:
838 efi_call_early(free_pool, gop_handle);
839 return status;
840}
841
842static efi_status_t
843setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
844{
845 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
846 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
847 unsigned long nr_ugas;
848 u32 *handles = (u32 *)uga_handle;;
849 efi_status_t status;
850 int i;
851
852 first_uga = NULL;
853 nr_ugas = size / sizeof(u32);
854 for (i = 0; i < nr_ugas; i++) {
855 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
856 u32 w, h, depth, refresh;
857 void *pciio;
858 u32 handle = handles[i];
859
860 status = efi_call_early(handle_protocol, handle,
861 &uga_proto, (void **)&uga);
862 if (status != EFI_SUCCESS)
863 continue;
864
865 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
866
867 status = efi_early->call((unsigned long)uga->get_mode, uga,
868 &w, &h, &depth, &refresh);
869 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
870 *width = w;
871 *height = h;
872
873 /*
874 * Once we've found a UGA supporting PCIIO,
875 * don't bother looking any further.
876 */
877 if (pciio)
878 break;
879
880 first_uga = uga;
881 }
882 }
883
884 return status;
885}
886
887static efi_status_t
888setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
889{
890 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
891 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
892 unsigned long nr_ugas;
893 u64 *handles = (u64 *)uga_handle;;
894 efi_status_t status;
895 int i;
896
897 first_uga = NULL;
898 nr_ugas = size / sizeof(u64);
899 for (i = 0; i < nr_ugas; i++) {
900 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
901 u32 w, h, depth, refresh;
902 void *pciio;
903 u64 handle = handles[i];
904
905 status = efi_call_early(handle_protocol, handle,
906 &uga_proto, (void **)&uga);
907 if (status != EFI_SUCCESS)
908 continue;
909
910 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
911
912 status = efi_early->call((unsigned long)uga->get_mode, uga,
913 &w, &h, &depth, &refresh);
914 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
915 *width = w;
916 *height = h;
917
918 /*
919 * Once we've found a UGA supporting PCIIO,
920 * don't bother looking any further.
921 */
922 if (pciio)
923 break;
924
925 first_uga = uga;
926 }
927 }
928
929 return status;
930}
931
932/*
933 * See if we have Universal Graphics Adapter (UGA) protocol
934 */
935static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
936 unsigned long size)
937{
938 efi_status_t status;
939 u32 width, height;
940 void **uga_handle = NULL;
941
942 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
943 size, (void **)&uga_handle);
944 if (status != EFI_SUCCESS)
945 return status;
946
947 status = efi_call_early(locate_handle,
948 EFI_LOCATE_BY_PROTOCOL,
949 uga_proto, NULL, &size, uga_handle);
950 if (status != EFI_SUCCESS)
951 goto free_handle;
952
953 height = 0;
954 width = 0;
955
956 if (efi_early->is64)
957 status = setup_uga64(uga_handle, size, &width, &height);
958 else
959 status = setup_uga32(uga_handle, size, &width, &height);
960
961 if (!width && !height)
962 goto free_handle;
963
964 /* EFI framebuffer */
965 si->orig_video_isVGA = VIDEO_TYPE_EFI;
966
967 si->lfb_depth = 32;
968 si->lfb_width = width;
969 si->lfb_height = height;
970
971 si->red_size = 8;
972 si->red_pos = 16;
973 si->green_size = 8;
974 si->green_pos = 8;
975 si->blue_size = 8;
976 si->blue_pos = 0;
977 si->rsvd_size = 8;
978 si->rsvd_pos = 24;
979
980free_handle:
981 efi_call_early(free_pool, uga_handle);
982 return status;
983}
984
985void setup_graphics(struct boot_params *boot_params)
986{
987 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
988 struct screen_info *si;
989 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
990 efi_status_t status;
991 unsigned long size;
992 void **gop_handle = NULL;
993 void **uga_handle = NULL;
994
995 si = &boot_params->screen_info;
996 memset(si, 0, sizeof(*si));
997
998 size = 0;
999 status = efi_call_early(locate_handle,
1000 EFI_LOCATE_BY_PROTOCOL,
1001 &graphics_proto, NULL, &size, gop_handle);
1002 if (status == EFI_BUFFER_TOO_SMALL)
1003 status = setup_gop(si, &graphics_proto, size);
1004
1005 if (status != EFI_SUCCESS) {
1006 size = 0;
1007 status = efi_call_early(locate_handle,
1008 EFI_LOCATE_BY_PROTOCOL,
1009 &uga_proto, NULL, &size, uga_handle);
1010 if (status == EFI_BUFFER_TOO_SMALL)
1011 setup_uga(si, &uga_proto, size);
1012 }
1013}
1014
1015/*
1016 * Because the x86 boot code expects to be passed a boot_params we
1017 * need to create one ourselves (usually the bootloader would create
1018 * one for us).
1019 *
1020 * The caller is responsible for filling out ->code32_start in the
1021 * returned boot_params.
1022 */
1023struct boot_params *make_boot_params(struct efi_config *c)
1024{
1025 struct boot_params *boot_params;
1026 struct sys_desc_table *sdt;
1027 struct apm_bios_info *bi;
1028 struct setup_header *hdr;
1029 struct efi_info *efi;
1030 efi_loaded_image_t *image;
1031 void *options, *handle;
1032 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
1033 int options_size = 0;
1034 efi_status_t status;
1035 char *cmdline_ptr;
1036 u16 *s2;
1037 u8 *s1;
1038 int i;
1039 unsigned long ramdisk_addr;
1040 unsigned long ramdisk_size;
1041
1042 efi_early = c;
1043 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1044 handle = (void *)(unsigned long)efi_early->image_handle;
1045
1046 /* Check if we were booted by the EFI firmware */
1047 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1048 return NULL;
1049
1050 if (efi_early->is64)
1051 setup_boot_services64(efi_early);
1052 else
1053 setup_boot_services32(efi_early);
1054
1055 status = efi_call_early(handle_protocol, handle,
1056 &proto, (void *)&image);
1057 if (status != EFI_SUCCESS) {
1058 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
1059 return NULL;
1060 }
1061
1062 status = efi_low_alloc(sys_table, 0x4000, 1,
1063 (unsigned long *)&boot_params);
1064 if (status != EFI_SUCCESS) {
1065 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
1066 return NULL;
1067 }
1068
1069 memset(boot_params, 0x0, 0x4000);
1070
1071 hdr = &boot_params->hdr;
1072 efi = &boot_params->efi_info;
1073 bi = &boot_params->apm_bios_info;
1074 sdt = &boot_params->sys_desc_table;
1075
1076 /* Copy the second sector to boot_params */
1077 memcpy(&hdr->jump, image->image_base + 512, 512);
1078
1079 /*
1080 * Fill out some of the header fields ourselves because the
1081 * EFI firmware loader doesn't load the first sector.
1082 */
1083 hdr->root_flags = 1;
1084 hdr->vid_mode = 0xffff;
1085 hdr->boot_flag = 0xAA55;
1086
1087 hdr->type_of_loader = 0x21;
1088
1089 /* Convert unicode cmdline to ascii */
1090 cmdline_ptr = efi_convert_cmdline_to_ascii(sys_table, image,
1091 &options_size);
1092 if (!cmdline_ptr)
1093 goto fail;
1094 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
1095
1096 hdr->ramdisk_image = 0;
1097 hdr->ramdisk_size = 0;
1098
1099 /* Clear APM BIOS info */
1100 memset(bi, 0, sizeof(*bi));
1101
1102 memset(sdt, 0, sizeof(*sdt));
1103
1104 status = handle_cmdline_files(sys_table, image,
1105 (char *)(unsigned long)hdr->cmd_line_ptr,
1106 "initrd=", hdr->initrd_addr_max,
1107 &ramdisk_addr, &ramdisk_size);
1108 if (status != EFI_SUCCESS)
1109 goto fail2;
1110 hdr->ramdisk_image = ramdisk_addr;
1111 hdr->ramdisk_size = ramdisk_size;
1112
1113 return boot_params;
1114fail2:
1115 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
1116fail:
1117 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
1118 return NULL;
1119}
1120
1121static void add_e820ext(struct boot_params *params,
1122 struct setup_data *e820ext, u32 nr_entries)
1123{
1124 struct setup_data *data;
1125 efi_status_t status;
1126 unsigned long size;
1127
1128 e820ext->type = SETUP_E820_EXT;
1129 e820ext->len = nr_entries * sizeof(struct e820entry);
1130 e820ext->next = 0;
1131
1132 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
1133
1134 while (data && data->next)
1135 data = (struct setup_data *)(unsigned long)data->next;
1136
1137 if (data)
1138 data->next = (unsigned long)e820ext;
1139 else
1140 params->hdr.setup_data = (unsigned long)e820ext;
1141}
1142
1143static efi_status_t setup_e820(struct boot_params *params,
1144 struct setup_data *e820ext, u32 e820ext_size)
1145{
1146 struct e820entry *e820_map = ¶ms->e820_map[0];
1147 struct efi_info *efi = ¶ms->efi_info;
1148 struct e820entry *prev = NULL;
1149 u32 nr_entries;
1150 u32 nr_desc;
1151 int i;
1152
1153 nr_entries = 0;
1154 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1155
1156 for (i = 0; i < nr_desc; i++) {
1157 efi_memory_desc_t *d;
1158 unsigned int e820_type = 0;
1159 unsigned long m = efi->efi_memmap;
1160
1161 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
1162 switch (d->type) {
1163 case EFI_RESERVED_TYPE:
1164 case EFI_RUNTIME_SERVICES_CODE:
1165 case EFI_RUNTIME_SERVICES_DATA:
1166 case EFI_MEMORY_MAPPED_IO:
1167 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1168 case EFI_PAL_CODE:
1169 e820_type = E820_RESERVED;
1170 break;
1171
1172 case EFI_UNUSABLE_MEMORY:
1173 e820_type = E820_UNUSABLE;
1174 break;
1175
1176 case EFI_ACPI_RECLAIM_MEMORY:
1177 e820_type = E820_ACPI;
1178 break;
1179
1180 case EFI_LOADER_CODE:
1181 case EFI_LOADER_DATA:
1182 case EFI_BOOT_SERVICES_CODE:
1183 case EFI_BOOT_SERVICES_DATA:
1184 case EFI_CONVENTIONAL_MEMORY:
1185 e820_type = E820_RAM;
1186 break;
1187
1188 case EFI_ACPI_MEMORY_NVS:
1189 e820_type = E820_NVS;
1190 break;
1191
1192 default:
1193 continue;
1194 }
1195
1196 /* Merge adjacent mappings */
1197 if (prev && prev->type == e820_type &&
1198 (prev->addr + prev->size) == d->phys_addr) {
1199 prev->size += d->num_pages << 12;
1200 continue;
1201 }
1202
1203 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1204 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1205 sizeof(struct setup_data);
1206
1207 if (!e820ext || e820ext_size < need)
1208 return EFI_BUFFER_TOO_SMALL;
1209
1210 /* boot_params map full, switch to e820 extended */
1211 e820_map = (struct e820entry *)e820ext->data;
1212 }
1213
1214 e820_map->addr = d->phys_addr;
1215 e820_map->size = d->num_pages << PAGE_SHIFT;
1216 e820_map->type = e820_type;
1217 prev = e820_map++;
1218 nr_entries++;
1219 }
1220
1221 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1222 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1223
1224 add_e820ext(params, e820ext, nr_e820ext);
1225 nr_entries -= nr_e820ext;
1226 }
1227
1228 params->e820_entries = (u8)nr_entries;
1229
1230 return EFI_SUCCESS;
1231}
1232
1233static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1234 u32 *e820ext_size)
1235{
1236 efi_status_t status;
1237 unsigned long size;
1238
1239 size = sizeof(struct setup_data) +
1240 sizeof(struct e820entry) * nr_desc;
1241
1242 if (*e820ext) {
1243 efi_call_early(free_pool, *e820ext);
1244 *e820ext = NULL;
1245 *e820ext_size = 0;
1246 }
1247
1248 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1249 size, (void **)e820ext);
1250 if (status == EFI_SUCCESS)
1251 *e820ext_size = size;
1252
1253 return status;
1254}
1255
1256static efi_status_t exit_boot(struct boot_params *boot_params,
1257 void *handle, bool is64)
1258{
1259 struct efi_info *efi = &boot_params->efi_info;
1260 unsigned long map_sz, key, desc_size;
1261 efi_memory_desc_t *mem_map;
1262 struct setup_data *e820ext;
1263 const char *signature;
1264 __u32 e820ext_size;
1265 __u32 nr_desc, prev_nr_desc;
1266 efi_status_t status;
1267 __u32 desc_version;
1268 bool called_exit = false;
1269 u8 nr_entries;
1270 int i;
1271
1272 nr_desc = 0;
1273 e820ext = NULL;
1274 e820ext_size = 0;
1275
1276get_map:
1277 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1278 &desc_version, &key);
1279
1280 if (status != EFI_SUCCESS)
1281 return status;
1282
1283 prev_nr_desc = nr_desc;
1284 nr_desc = map_sz / desc_size;
1285 if (nr_desc > prev_nr_desc &&
1286 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1287 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1288
1289 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1290 if (status != EFI_SUCCESS)
1291 goto free_mem_map;
1292
1293 efi_call_early(free_pool, mem_map);
1294 goto get_map; /* Allocated memory, get map again */
1295 }
1296
1297 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1298 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1299
1300 efi->efi_systab = (unsigned long)sys_table;
1301 efi->efi_memdesc_size = desc_size;
1302 efi->efi_memdesc_version = desc_version;
1303 efi->efi_memmap = (unsigned long)mem_map;
1304 efi->efi_memmap_size = map_sz;
1305
1306#ifdef CONFIG_X86_64
1307 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1308 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1309#endif
1310
1311 /* Might as well exit boot services now */
1312 status = efi_call_early(exit_boot_services, handle, key);
1313 if (status != EFI_SUCCESS) {
1314 /*
1315 * ExitBootServices() will fail if any of the event
1316 * handlers change the memory map. In which case, we
1317 * must be prepared to retry, but only once so that
1318 * we're guaranteed to exit on repeated failures instead
1319 * of spinning forever.
1320 */
1321 if (called_exit)
1322 goto free_mem_map;
1323
1324 called_exit = true;
1325 efi_call_early(free_pool, mem_map);
1326 goto get_map;
1327 }
1328
1329 /* Historic? */
1330 boot_params->alt_mem_k = 32 * 1024;
1331
1332 status = setup_e820(boot_params, e820ext, e820ext_size);
1333 if (status != EFI_SUCCESS)
1334 return status;
1335
1336 return EFI_SUCCESS;
1337
1338free_mem_map:
1339 efi_call_early(free_pool, mem_map);
1340 return status;
1341}
1342
1343/*
1344 * On success we return a pointer to a boot_params structure, and NULL
1345 * on failure.
1346 */
1347struct boot_params *efi_main(struct efi_config *c,
1348 struct boot_params *boot_params)
1349{
1350 struct desc_ptr *gdt = NULL;
1351 efi_loaded_image_t *image;
1352 struct setup_header *hdr = &boot_params->hdr;
1353 efi_status_t status;
1354 struct desc_struct *desc;
1355 void *handle;
1356 efi_system_table_t *_table;
1357 bool is64;
1358
1359 efi_early = c;
1360
1361 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1362 handle = (void *)(unsigned long)efi_early->image_handle;
1363 is64 = efi_early->is64;
1364
1365 sys_table = _table;
1366
1367 /* Check if we were booted by the EFI firmware */
1368 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1369 goto fail;
1370
1371 if (is64)
1372 setup_boot_services64(efi_early);
1373 else
1374 setup_boot_services32(efi_early);
1375
1376 setup_graphics(boot_params);
1377
1378 setup_efi_pci(boot_params);
1379
1380 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1381 sizeof(*gdt), (void **)&gdt);
1382 if (status != EFI_SUCCESS) {
1383 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1384 goto fail;
1385 }
1386
1387 gdt->size = 0x800;
1388 status = efi_low_alloc(sys_table, gdt->size, 8,
1389 (unsigned long *)&gdt->address);
1390 if (status != EFI_SUCCESS) {
1391 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1392 goto fail;
1393 }
1394
1395 /*
1396 * If the kernel isn't already loaded at the preferred load
1397 * address, relocate it.
1398 */
1399 if (hdr->pref_address != hdr->code32_start) {
1400 unsigned long bzimage_addr = hdr->code32_start;
1401 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1402 hdr->init_size, hdr->init_size,
1403 hdr->pref_address,
1404 hdr->kernel_alignment);
1405 if (status != EFI_SUCCESS)
1406 goto fail;
1407
1408 hdr->pref_address = hdr->code32_start;
1409 hdr->code32_start = bzimage_addr;
1410 }
1411
1412 status = exit_boot(boot_params, handle, is64);
1413 if (status != EFI_SUCCESS)
1414 goto fail;
1415
1416 memset((char *)gdt->address, 0x0, gdt->size);
1417 desc = (struct desc_struct *)gdt->address;
1418
1419 /* The first GDT is a dummy and the second is unused. */
1420 desc += 2;
1421
1422 desc->limit0 = 0xffff;
1423 desc->base0 = 0x0000;
1424 desc->base1 = 0x0000;
1425 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1426 desc->s = DESC_TYPE_CODE_DATA;
1427 desc->dpl = 0;
1428 desc->p = 1;
1429 desc->limit = 0xf;
1430 desc->avl = 0;
1431 desc->l = 0;
1432 desc->d = SEG_OP_SIZE_32BIT;
1433 desc->g = SEG_GRANULARITY_4KB;
1434 desc->base2 = 0x00;
1435
1436 desc++;
1437 desc->limit0 = 0xffff;
1438 desc->base0 = 0x0000;
1439 desc->base1 = 0x0000;
1440 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1441 desc->s = DESC_TYPE_CODE_DATA;
1442 desc->dpl = 0;
1443 desc->p = 1;
1444 desc->limit = 0xf;
1445 desc->avl = 0;
1446 desc->l = 0;
1447 desc->d = SEG_OP_SIZE_32BIT;
1448 desc->g = SEG_GRANULARITY_4KB;
1449 desc->base2 = 0x00;
1450
1451#ifdef CONFIG_X86_64
1452 /* Task segment value */
1453 desc++;
1454 desc->limit0 = 0x0000;
1455 desc->base0 = 0x0000;
1456 desc->base1 = 0x0000;
1457 desc->type = SEG_TYPE_TSS;
1458 desc->s = 0;
1459 desc->dpl = 0;
1460 desc->p = 1;
1461 desc->limit = 0x0;
1462 desc->avl = 0;
1463 desc->l = 0;
1464 desc->d = 0;
1465 desc->g = SEG_GRANULARITY_4KB;
1466 desc->base2 = 0x00;
1467#endif /* CONFIG_X86_64 */
1468
1469 asm volatile("cli");
1470 asm volatile ("lgdt %0" : : "m" (*gdt));
1471
1472 return boot_params;
1473fail:
1474 return NULL;
1475}
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 <asm/efi.h>
12#include <asm/setup.h>
13#include <asm/desc.h>
14
15#include "eboot.h"
16
17static efi_system_table_t *sys_table;
18
19static void efi_printk(char *str)
20{
21 char *s8;
22
23 for (s8 = str; *s8; s8++) {
24 struct efi_simple_text_output_protocol *out;
25 efi_char16_t ch[2] = { 0 };
26
27 ch[0] = *s8;
28 out = (struct efi_simple_text_output_protocol *)sys_table->con_out;
29
30 if (*s8 == '\n') {
31 efi_char16_t nl[2] = { '\r', 0 };
32 efi_call_phys2(out->output_string, out, nl);
33 }
34
35 efi_call_phys2(out->output_string, out, ch);
36 }
37}
38
39static efi_status_t __get_map(efi_memory_desc_t **map, unsigned long *map_size,
40 unsigned long *desc_size)
41{
42 efi_memory_desc_t *m = NULL;
43 efi_status_t status;
44 unsigned long key;
45 u32 desc_version;
46
47 *map_size = sizeof(*m) * 32;
48again:
49 /*
50 * Add an additional efi_memory_desc_t because we're doing an
51 * allocation which may be in a new descriptor region.
52 */
53 *map_size += sizeof(*m);
54 status = efi_call_phys3(sys_table->boottime->allocate_pool,
55 EFI_LOADER_DATA, *map_size, (void **)&m);
56 if (status != EFI_SUCCESS)
57 goto fail;
58
59 status = efi_call_phys5(sys_table->boottime->get_memory_map, map_size,
60 m, &key, desc_size, &desc_version);
61 if (status == EFI_BUFFER_TOO_SMALL) {
62 efi_call_phys1(sys_table->boottime->free_pool, m);
63 goto again;
64 }
65
66 if (status != EFI_SUCCESS)
67 efi_call_phys1(sys_table->boottime->free_pool, m);
68
69fail:
70 *map = m;
71 return status;
72}
73
74/*
75 * Allocate at the highest possible address that is not above 'max'.
76 */
77static efi_status_t high_alloc(unsigned long size, unsigned long align,
78 unsigned long *addr, unsigned long max)
79{
80 unsigned long map_size, desc_size;
81 efi_memory_desc_t *map;
82 efi_status_t status;
83 unsigned long nr_pages;
84 u64 max_addr = 0;
85 int i;
86
87 status = __get_map(&map, &map_size, &desc_size);
88 if (status != EFI_SUCCESS)
89 goto fail;
90
91 nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
92again:
93 for (i = 0; i < map_size / desc_size; i++) {
94 efi_memory_desc_t *desc;
95 unsigned long m = (unsigned long)map;
96 u64 start, end;
97
98 desc = (efi_memory_desc_t *)(m + (i * desc_size));
99 if (desc->type != EFI_CONVENTIONAL_MEMORY)
100 continue;
101
102 if (desc->num_pages < nr_pages)
103 continue;
104
105 start = desc->phys_addr;
106 end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
107
108 if ((start + size) > end || (start + size) > max)
109 continue;
110
111 if (end - size > max)
112 end = max;
113
114 if (round_down(end - size, align) < start)
115 continue;
116
117 start = round_down(end - size, align);
118
119 /*
120 * Don't allocate at 0x0. It will confuse code that
121 * checks pointers against NULL.
122 */
123 if (start == 0x0)
124 continue;
125
126 if (start > max_addr)
127 max_addr = start;
128 }
129
130 if (!max_addr)
131 status = EFI_NOT_FOUND;
132 else {
133 status = efi_call_phys4(sys_table->boottime->allocate_pages,
134 EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
135 nr_pages, &max_addr);
136 if (status != EFI_SUCCESS) {
137 max = max_addr;
138 max_addr = 0;
139 goto again;
140 }
141
142 *addr = max_addr;
143 }
144
145free_pool:
146 efi_call_phys1(sys_table->boottime->free_pool, map);
147
148fail:
149 return status;
150}
151
152/*
153 * Allocate at the lowest possible address.
154 */
155static efi_status_t low_alloc(unsigned long size, unsigned long align,
156 unsigned long *addr)
157{
158 unsigned long map_size, desc_size;
159 efi_memory_desc_t *map;
160 efi_status_t status;
161 unsigned long nr_pages;
162 int i;
163
164 status = __get_map(&map, &map_size, &desc_size);
165 if (status != EFI_SUCCESS)
166 goto fail;
167
168 nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
169 for (i = 0; i < map_size / desc_size; i++) {
170 efi_memory_desc_t *desc;
171 unsigned long m = (unsigned long)map;
172 u64 start, end;
173
174 desc = (efi_memory_desc_t *)(m + (i * desc_size));
175
176 if (desc->type != EFI_CONVENTIONAL_MEMORY)
177 continue;
178
179 if (desc->num_pages < nr_pages)
180 continue;
181
182 start = desc->phys_addr;
183 end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT);
184
185 /*
186 * Don't allocate at 0x0. It will confuse code that
187 * checks pointers against NULL. Skip the first 8
188 * bytes so we start at a nice even number.
189 */
190 if (start == 0x0)
191 start += 8;
192
193 start = round_up(start, align);
194 if ((start + size) > end)
195 continue;
196
197 status = efi_call_phys4(sys_table->boottime->allocate_pages,
198 EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
199 nr_pages, &start);
200 if (status == EFI_SUCCESS) {
201 *addr = start;
202 break;
203 }
204 }
205
206 if (i == map_size / desc_size)
207 status = EFI_NOT_FOUND;
208
209free_pool:
210 efi_call_phys1(sys_table->boottime->free_pool, map);
211fail:
212 return status;
213}
214
215static void low_free(unsigned long size, unsigned long addr)
216{
217 unsigned long nr_pages;
218
219 nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
220 efi_call_phys2(sys_table->boottime->free_pages, addr, size);
221}
222
223static void find_bits(unsigned long mask, u8 *pos, u8 *size)
224{
225 u8 first, len;
226
227 first = 0;
228 len = 0;
229
230 if (mask) {
231 while (!(mask & 0x1)) {
232 mask = mask >> 1;
233 first++;
234 }
235
236 while (mask & 0x1) {
237 mask = mask >> 1;
238 len++;
239 }
240 }
241
242 *pos = first;
243 *size = len;
244}
245
246/*
247 * See if we have Graphics Output Protocol
248 */
249static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
250 unsigned long size)
251{
252 struct efi_graphics_output_protocol *gop, *first_gop;
253 struct efi_pixel_bitmask pixel_info;
254 unsigned long nr_gops;
255 efi_status_t status;
256 void **gop_handle;
257 u16 width, height;
258 u32 fb_base, fb_size;
259 u32 pixels_per_scan_line;
260 int pixel_format;
261 int i;
262
263 status = efi_call_phys3(sys_table->boottime->allocate_pool,
264 EFI_LOADER_DATA, size, &gop_handle);
265 if (status != EFI_SUCCESS)
266 return status;
267
268 status = efi_call_phys5(sys_table->boottime->locate_handle,
269 EFI_LOCATE_BY_PROTOCOL, proto,
270 NULL, &size, gop_handle);
271 if (status != EFI_SUCCESS)
272 goto free_handle;
273
274 first_gop = NULL;
275
276 nr_gops = size / sizeof(void *);
277 for (i = 0; i < nr_gops; i++) {
278 struct efi_graphics_output_mode_info *info;
279 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
280 void *pciio;
281 void *h = gop_handle[i];
282
283 status = efi_call_phys3(sys_table->boottime->handle_protocol,
284 h, proto, &gop);
285 if (status != EFI_SUCCESS)
286 continue;
287
288 efi_call_phys3(sys_table->boottime->handle_protocol,
289 h, &pciio_proto, &pciio);
290
291 status = efi_call_phys4(gop->query_mode, gop,
292 gop->mode->mode, &size, &info);
293 if (status == EFI_SUCCESS && (!first_gop || pciio)) {
294 /*
295 * Apple provide GOPs that are not backed by
296 * real hardware (they're used to handle
297 * multiple displays). The workaround is to
298 * search for a GOP implementing the PCIIO
299 * protocol, and if one isn't found, to just
300 * fallback to the first GOP.
301 */
302 width = info->horizontal_resolution;
303 height = info->vertical_resolution;
304 fb_base = gop->mode->frame_buffer_base;
305 fb_size = gop->mode->frame_buffer_size;
306 pixel_format = info->pixel_format;
307 pixel_info = info->pixel_information;
308 pixels_per_scan_line = info->pixels_per_scan_line;
309
310 /*
311 * Once we've found a GOP supporting PCIIO,
312 * don't bother looking any further.
313 */
314 if (pciio)
315 break;
316
317 first_gop = gop;
318 }
319 }
320
321 /* Did we find any GOPs? */
322 if (!first_gop)
323 goto free_handle;
324
325 /* EFI framebuffer */
326 si->orig_video_isVGA = VIDEO_TYPE_EFI;
327
328 si->lfb_width = width;
329 si->lfb_height = height;
330 si->lfb_base = fb_base;
331 si->lfb_size = fb_size;
332 si->pages = 1;
333
334 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
335 si->lfb_depth = 32;
336 si->lfb_linelength = pixels_per_scan_line * 4;
337 si->red_size = 8;
338 si->red_pos = 0;
339 si->green_size = 8;
340 si->green_pos = 8;
341 si->blue_size = 8;
342 si->blue_pos = 16;
343 si->rsvd_size = 8;
344 si->rsvd_pos = 24;
345 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
346 si->lfb_depth = 32;
347 si->lfb_linelength = pixels_per_scan_line * 4;
348 si->red_size = 8;
349 si->red_pos = 16;
350 si->green_size = 8;
351 si->green_pos = 8;
352 si->blue_size = 8;
353 si->blue_pos = 0;
354 si->rsvd_size = 8;
355 si->rsvd_pos = 24;
356 } else if (pixel_format == PIXEL_BIT_MASK) {
357 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
358 find_bits(pixel_info.green_mask, &si->green_pos,
359 &si->green_size);
360 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
361 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
362 &si->rsvd_size);
363 si->lfb_depth = si->red_size + si->green_size +
364 si->blue_size + si->rsvd_size;
365 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
366 } else {
367 si->lfb_depth = 4;
368 si->lfb_linelength = si->lfb_width / 2;
369 si->red_size = 0;
370 si->red_pos = 0;
371 si->green_size = 0;
372 si->green_pos = 0;
373 si->blue_size = 0;
374 si->blue_pos = 0;
375 si->rsvd_size = 0;
376 si->rsvd_pos = 0;
377 }
378
379free_handle:
380 efi_call_phys1(sys_table->boottime->free_pool, gop_handle);
381 return status;
382}
383
384/*
385 * See if we have Universal Graphics Adapter (UGA) protocol
386 */
387static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
388 unsigned long size)
389{
390 struct efi_uga_draw_protocol *uga, *first_uga;
391 unsigned long nr_ugas;
392 efi_status_t status;
393 u32 width, height;
394 void **uga_handle = NULL;
395 int i;
396
397 status = efi_call_phys3(sys_table->boottime->allocate_pool,
398 EFI_LOADER_DATA, size, &uga_handle);
399 if (status != EFI_SUCCESS)
400 return status;
401
402 status = efi_call_phys5(sys_table->boottime->locate_handle,
403 EFI_LOCATE_BY_PROTOCOL, uga_proto,
404 NULL, &size, uga_handle);
405 if (status != EFI_SUCCESS)
406 goto free_handle;
407
408 first_uga = NULL;
409
410 nr_ugas = size / sizeof(void *);
411 for (i = 0; i < nr_ugas; i++) {
412 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
413 void *handle = uga_handle[i];
414 u32 w, h, depth, refresh;
415 void *pciio;
416
417 status = efi_call_phys3(sys_table->boottime->handle_protocol,
418 handle, uga_proto, &uga);
419 if (status != EFI_SUCCESS)
420 continue;
421
422 efi_call_phys3(sys_table->boottime->handle_protocol,
423 handle, &pciio_proto, &pciio);
424
425 status = efi_call_phys5(uga->get_mode, uga, &w, &h,
426 &depth, &refresh);
427 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
428 width = w;
429 height = h;
430
431 /*
432 * Once we've found a UGA supporting PCIIO,
433 * don't bother looking any further.
434 */
435 if (pciio)
436 break;
437
438 first_uga = uga;
439 }
440 }
441
442 if (!first_uga)
443 goto free_handle;
444
445 /* EFI framebuffer */
446 si->orig_video_isVGA = VIDEO_TYPE_EFI;
447
448 si->lfb_depth = 32;
449 si->lfb_width = width;
450 si->lfb_height = height;
451
452 si->red_size = 8;
453 si->red_pos = 16;
454 si->green_size = 8;
455 si->green_pos = 8;
456 si->blue_size = 8;
457 si->blue_pos = 0;
458 si->rsvd_size = 8;
459 si->rsvd_pos = 24;
460
461
462free_handle:
463 efi_call_phys1(sys_table->boottime->free_pool, uga_handle);
464 return status;
465}
466
467void setup_graphics(struct boot_params *boot_params)
468{
469 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
470 struct screen_info *si;
471 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
472 efi_status_t status;
473 unsigned long size;
474 void **gop_handle = NULL;
475 void **uga_handle = NULL;
476
477 si = &boot_params->screen_info;
478 memset(si, 0, sizeof(*si));
479
480 size = 0;
481 status = efi_call_phys5(sys_table->boottime->locate_handle,
482 EFI_LOCATE_BY_PROTOCOL, &graphics_proto,
483 NULL, &size, gop_handle);
484 if (status == EFI_BUFFER_TOO_SMALL)
485 status = setup_gop(si, &graphics_proto, size);
486
487 if (status != EFI_SUCCESS) {
488 size = 0;
489 status = efi_call_phys5(sys_table->boottime->locate_handle,
490 EFI_LOCATE_BY_PROTOCOL, &uga_proto,
491 NULL, &size, uga_handle);
492 if (status == EFI_BUFFER_TOO_SMALL)
493 setup_uga(si, &uga_proto, size);
494 }
495}
496
497struct initrd {
498 efi_file_handle_t *handle;
499 u64 size;
500};
501
502/*
503 * Check the cmdline for a LILO-style initrd= arguments.
504 *
505 * We only support loading an initrd from the same filesystem as the
506 * kernel image.
507 */
508static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
509 struct setup_header *hdr)
510{
511 struct initrd *initrds;
512 unsigned long initrd_addr;
513 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
514 u64 initrd_total;
515 efi_file_io_interface_t *io;
516 efi_file_handle_t *fh;
517 efi_status_t status;
518 int nr_initrds;
519 char *str;
520 int i, j, k;
521
522 initrd_addr = 0;
523 initrd_total = 0;
524
525 str = (char *)(unsigned long)hdr->cmd_line_ptr;
526
527 j = 0; /* See close_handles */
528
529 if (!str || !*str)
530 return EFI_SUCCESS;
531
532 for (nr_initrds = 0; *str; nr_initrds++) {
533 str = strstr(str, "initrd=");
534 if (!str)
535 break;
536
537 str += 7;
538
539 /* Skip any leading slashes */
540 while (*str == '/' || *str == '\\')
541 str++;
542
543 while (*str && *str != ' ' && *str != '\n')
544 str++;
545 }
546
547 if (!nr_initrds)
548 return EFI_SUCCESS;
549
550 status = efi_call_phys3(sys_table->boottime->allocate_pool,
551 EFI_LOADER_DATA,
552 nr_initrds * sizeof(*initrds),
553 &initrds);
554 if (status != EFI_SUCCESS) {
555 efi_printk("Failed to alloc mem for initrds\n");
556 goto fail;
557 }
558
559 str = (char *)(unsigned long)hdr->cmd_line_ptr;
560 for (i = 0; i < nr_initrds; i++) {
561 struct initrd *initrd;
562 efi_file_handle_t *h;
563 efi_file_info_t *info;
564 efi_char16_t filename_16[256];
565 unsigned long info_sz;
566 efi_guid_t info_guid = EFI_FILE_INFO_ID;
567 efi_char16_t *p;
568 u64 file_sz;
569
570 str = strstr(str, "initrd=");
571 if (!str)
572 break;
573
574 str += 7;
575
576 initrd = &initrds[i];
577 p = filename_16;
578
579 /* Skip any leading slashes */
580 while (*str == '/' || *str == '\\')
581 str++;
582
583 while (*str && *str != ' ' && *str != '\n') {
584 if ((u8 *)p >= (u8 *)filename_16 + sizeof(filename_16))
585 break;
586
587 *p++ = *str++;
588 }
589
590 *p = '\0';
591
592 /* Only open the volume once. */
593 if (!i) {
594 efi_boot_services_t *boottime;
595
596 boottime = sys_table->boottime;
597
598 status = efi_call_phys3(boottime->handle_protocol,
599 image->device_handle, &fs_proto, &io);
600 if (status != EFI_SUCCESS) {
601 efi_printk("Failed to handle fs_proto\n");
602 goto free_initrds;
603 }
604
605 status = efi_call_phys2(io->open_volume, io, &fh);
606 if (status != EFI_SUCCESS) {
607 efi_printk("Failed to open volume\n");
608 goto free_initrds;
609 }
610 }
611
612 status = efi_call_phys5(fh->open, fh, &h, filename_16,
613 EFI_FILE_MODE_READ, (u64)0);
614 if (status != EFI_SUCCESS) {
615 efi_printk("Failed to open initrd file\n");
616 goto close_handles;
617 }
618
619 initrd->handle = h;
620
621 info_sz = 0;
622 status = efi_call_phys4(h->get_info, h, &info_guid,
623 &info_sz, NULL);
624 if (status != EFI_BUFFER_TOO_SMALL) {
625 efi_printk("Failed to get initrd info size\n");
626 goto close_handles;
627 }
628
629grow:
630 status = efi_call_phys3(sys_table->boottime->allocate_pool,
631 EFI_LOADER_DATA, info_sz, &info);
632 if (status != EFI_SUCCESS) {
633 efi_printk("Failed to alloc mem for initrd info\n");
634 goto close_handles;
635 }
636
637 status = efi_call_phys4(h->get_info, h, &info_guid,
638 &info_sz, info);
639 if (status == EFI_BUFFER_TOO_SMALL) {
640 efi_call_phys1(sys_table->boottime->free_pool, info);
641 goto grow;
642 }
643
644 file_sz = info->file_size;
645 efi_call_phys1(sys_table->boottime->free_pool, info);
646
647 if (status != EFI_SUCCESS) {
648 efi_printk("Failed to get initrd info\n");
649 goto close_handles;
650 }
651
652 initrd->size = file_sz;
653 initrd_total += file_sz;
654 }
655
656 if (initrd_total) {
657 unsigned long addr;
658
659 /*
660 * Multiple initrd's need to be at consecutive
661 * addresses in memory, so allocate enough memory for
662 * all the initrd's.
663 */
664 status = high_alloc(initrd_total, 0x1000,
665 &initrd_addr, hdr->initrd_addr_max);
666 if (status != EFI_SUCCESS) {
667 efi_printk("Failed to alloc highmem for initrds\n");
668 goto close_handles;
669 }
670
671 /* We've run out of free low memory. */
672 if (initrd_addr > hdr->initrd_addr_max) {
673 efi_printk("We've run out of free low memory\n");
674 status = EFI_INVALID_PARAMETER;
675 goto free_initrd_total;
676 }
677
678 addr = initrd_addr;
679 for (j = 0; j < nr_initrds; j++) {
680 u64 size;
681
682 size = initrds[j].size;
683 while (size) {
684 u64 chunksize;
685 if (size > EFI_READ_CHUNK_SIZE)
686 chunksize = EFI_READ_CHUNK_SIZE;
687 else
688 chunksize = size;
689 status = efi_call_phys3(fh->read,
690 initrds[j].handle,
691 &chunksize, addr);
692 if (status != EFI_SUCCESS) {
693 efi_printk("Failed to read initrd\n");
694 goto free_initrd_total;
695 }
696 addr += chunksize;
697 size -= chunksize;
698 }
699
700 efi_call_phys1(fh->close, initrds[j].handle);
701 }
702
703 }
704
705 efi_call_phys1(sys_table->boottime->free_pool, initrds);
706
707 hdr->ramdisk_image = initrd_addr;
708 hdr->ramdisk_size = initrd_total;
709
710 return status;
711
712free_initrd_total:
713 low_free(initrd_total, initrd_addr);
714
715close_handles:
716 for (k = j; k < i; k++)
717 efi_call_phys1(fh->close, initrds[k].handle);
718free_initrds:
719 efi_call_phys1(sys_table->boottime->free_pool, initrds);
720fail:
721 hdr->ramdisk_image = 0;
722 hdr->ramdisk_size = 0;
723
724 return status;
725}
726
727/*
728 * Because the x86 boot code expects to be passed a boot_params we
729 * need to create one ourselves (usually the bootloader would create
730 * one for us).
731 */
732static efi_status_t make_boot_params(struct boot_params *boot_params,
733 efi_loaded_image_t *image,
734 void *handle)
735{
736 struct efi_info *efi = &boot_params->efi_info;
737 struct apm_bios_info *bi = &boot_params->apm_bios_info;
738 struct sys_desc_table *sdt = &boot_params->sys_desc_table;
739 struct e820entry *e820_map = &boot_params->e820_map[0];
740 struct e820entry *prev = NULL;
741 struct setup_header *hdr = &boot_params->hdr;
742 unsigned long size, key, desc_size, _size;
743 efi_memory_desc_t *mem_map;
744 void *options = image->load_options;
745 u32 load_options_size = image->load_options_size / 2; /* ASCII */
746 int options_size = 0;
747 efi_status_t status;
748 __u32 desc_version;
749 unsigned long cmdline;
750 u8 nr_entries;
751 u16 *s2;
752 u8 *s1;
753 int i;
754
755 hdr->type_of_loader = 0x21;
756
757 /* Convert unicode cmdline to ascii */
758 cmdline = 0;
759 s2 = (u16 *)options;
760
761 if (s2) {
762 while (*s2 && *s2 != '\n' && options_size < load_options_size) {
763 s2++;
764 options_size++;
765 }
766
767 if (options_size) {
768 if (options_size > hdr->cmdline_size)
769 options_size = hdr->cmdline_size;
770
771 options_size++; /* NUL termination */
772
773 status = low_alloc(options_size, 1, &cmdline);
774 if (status != EFI_SUCCESS) {
775 efi_printk("Failed to alloc mem for cmdline\n");
776 goto fail;
777 }
778
779 s1 = (u8 *)(unsigned long)cmdline;
780 s2 = (u16 *)options;
781
782 for (i = 0; i < options_size - 1; i++)
783 *s1++ = *s2++;
784
785 *s1 = '\0';
786 }
787 }
788
789 hdr->cmd_line_ptr = cmdline;
790
791 hdr->ramdisk_image = 0;
792 hdr->ramdisk_size = 0;
793
794 status = handle_ramdisks(image, hdr);
795 if (status != EFI_SUCCESS)
796 goto free_cmdline;
797
798 setup_graphics(boot_params);
799
800 /* Clear APM BIOS info */
801 memset(bi, 0, sizeof(*bi));
802
803 memset(sdt, 0, sizeof(*sdt));
804
805 memcpy(&efi->efi_loader_signature, EFI_LOADER_SIGNATURE, sizeof(__u32));
806
807 size = sizeof(*mem_map) * 32;
808
809again:
810 size += sizeof(*mem_map);
811 _size = size;
812 status = low_alloc(size, 1, (unsigned long *)&mem_map);
813 if (status != EFI_SUCCESS)
814 goto free_cmdline;
815
816 status = efi_call_phys5(sys_table->boottime->get_memory_map, &size,
817 mem_map, &key, &desc_size, &desc_version);
818 if (status == EFI_BUFFER_TOO_SMALL) {
819 low_free(_size, (unsigned long)mem_map);
820 goto again;
821 }
822
823 if (status != EFI_SUCCESS)
824 goto free_mem_map;
825
826 efi->efi_systab = (unsigned long)sys_table;
827 efi->efi_memdesc_size = desc_size;
828 efi->efi_memdesc_version = desc_version;
829 efi->efi_memmap = (unsigned long)mem_map;
830 efi->efi_memmap_size = size;
831
832#ifdef CONFIG_X86_64
833 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
834 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
835#endif
836
837 /* Might as well exit boot services now */
838 status = efi_call_phys2(sys_table->boottime->exit_boot_services,
839 handle, key);
840 if (status != EFI_SUCCESS)
841 goto free_mem_map;
842
843 /* Historic? */
844 boot_params->alt_mem_k = 32 * 1024;
845
846 /*
847 * Convert the EFI memory map to E820.
848 */
849 nr_entries = 0;
850 for (i = 0; i < size / desc_size; i++) {
851 efi_memory_desc_t *d;
852 unsigned int e820_type = 0;
853 unsigned long m = (unsigned long)mem_map;
854
855 d = (efi_memory_desc_t *)(m + (i * desc_size));
856 switch (d->type) {
857 case EFI_RESERVED_TYPE:
858 case EFI_RUNTIME_SERVICES_CODE:
859 case EFI_RUNTIME_SERVICES_DATA:
860 case EFI_MEMORY_MAPPED_IO:
861 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
862 case EFI_PAL_CODE:
863 e820_type = E820_RESERVED;
864 break;
865
866 case EFI_UNUSABLE_MEMORY:
867 e820_type = E820_UNUSABLE;
868 break;
869
870 case EFI_ACPI_RECLAIM_MEMORY:
871 e820_type = E820_ACPI;
872 break;
873
874 case EFI_LOADER_CODE:
875 case EFI_LOADER_DATA:
876 case EFI_BOOT_SERVICES_CODE:
877 case EFI_BOOT_SERVICES_DATA:
878 case EFI_CONVENTIONAL_MEMORY:
879 e820_type = E820_RAM;
880 break;
881
882 case EFI_ACPI_MEMORY_NVS:
883 e820_type = E820_NVS;
884 break;
885
886 default:
887 continue;
888 }
889
890 /* Merge adjacent mappings */
891 if (prev && prev->type == e820_type &&
892 (prev->addr + prev->size) == d->phys_addr)
893 prev->size += d->num_pages << 12;
894 else {
895 e820_map->addr = d->phys_addr;
896 e820_map->size = d->num_pages << 12;
897 e820_map->type = e820_type;
898 prev = e820_map++;
899 nr_entries++;
900 }
901 }
902
903 boot_params->e820_entries = nr_entries;
904
905 return EFI_SUCCESS;
906
907free_mem_map:
908 low_free(_size, (unsigned long)mem_map);
909free_cmdline:
910 if (options_size)
911 low_free(options_size, hdr->cmd_line_ptr);
912fail:
913 return status;
914}
915
916/*
917 * On success we return a pointer to a boot_params structure, and NULL
918 * on failure.
919 */
920struct boot_params *efi_main(void *handle, efi_system_table_t *_table)
921{
922 struct boot_params *boot_params;
923 unsigned long start, nr_pages;
924 struct desc_ptr *gdt, *idt;
925 efi_loaded_image_t *image;
926 struct setup_header *hdr;
927 efi_status_t status;
928 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
929 struct desc_struct *desc;
930
931 sys_table = _table;
932
933 /* Check if we were booted by the EFI firmware */
934 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
935 goto fail;
936
937 status = efi_call_phys3(sys_table->boottime->handle_protocol,
938 handle, &proto, (void *)&image);
939 if (status != EFI_SUCCESS) {
940 efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
941 goto fail;
942 }
943
944 status = low_alloc(0x4000, 1, (unsigned long *)&boot_params);
945 if (status != EFI_SUCCESS) {
946 efi_printk("Failed to alloc lowmem for boot params\n");
947 goto fail;
948 }
949
950 memset(boot_params, 0x0, 0x4000);
951
952 hdr = &boot_params->hdr;
953
954 /* Copy the second sector to boot_params */
955 memcpy(&hdr->jump, image->image_base + 512, 512);
956
957 /*
958 * Fill out some of the header fields ourselves because the
959 * EFI firmware loader doesn't load the first sector.
960 */
961 hdr->root_flags = 1;
962 hdr->vid_mode = 0xffff;
963 hdr->boot_flag = 0xAA55;
964
965 /*
966 * The EFI firmware loader could have placed the kernel image
967 * anywhere in memory, but the kernel has various restrictions
968 * on the max physical address it can run at. Attempt to move
969 * the kernel to boot_params.pref_address, or as low as
970 * possible.
971 */
972 start = hdr->pref_address;
973 nr_pages = round_up(hdr->init_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE;
974
975 status = efi_call_phys4(sys_table->boottime->allocate_pages,
976 EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA,
977 nr_pages, &start);
978 if (status != EFI_SUCCESS) {
979 status = low_alloc(hdr->init_size, hdr->kernel_alignment,
980 &start);
981 if (status != EFI_SUCCESS) {
982 efi_printk("Failed to alloc mem for kernel\n");
983 goto fail;
984 }
985 }
986
987 hdr->code32_start = (__u32)start;
988 hdr->pref_address = (__u64)(unsigned long)image->image_base;
989
990 memcpy((void *)start, image->image_base, image->image_size);
991
992 status = efi_call_phys3(sys_table->boottime->allocate_pool,
993 EFI_LOADER_DATA, sizeof(*gdt),
994 (void **)&gdt);
995 if (status != EFI_SUCCESS) {
996 efi_printk("Failed to alloc mem for gdt structure\n");
997 goto fail;
998 }
999
1000 gdt->size = 0x800;
1001 status = low_alloc(gdt->size, 8, (unsigned long *)&gdt->address);
1002 if (status != EFI_SUCCESS) {
1003 efi_printk("Failed to alloc mem for gdt\n");
1004 goto fail;
1005 }
1006
1007 status = efi_call_phys3(sys_table->boottime->allocate_pool,
1008 EFI_LOADER_DATA, sizeof(*idt),
1009 (void **)&idt);
1010 if (status != EFI_SUCCESS) {
1011 efi_printk("Failed to alloc mem for idt structure\n");
1012 goto fail;
1013 }
1014
1015 idt->size = 0;
1016 idt->address = 0;
1017
1018 status = make_boot_params(boot_params, image, handle);
1019 if (status != EFI_SUCCESS)
1020 goto fail;
1021
1022 memset((char *)gdt->address, 0x0, gdt->size);
1023 desc = (struct desc_struct *)gdt->address;
1024
1025 /* The first GDT is a dummy and the second is unused. */
1026 desc += 2;
1027
1028 desc->limit0 = 0xffff;
1029 desc->base0 = 0x0000;
1030 desc->base1 = 0x0000;
1031 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1032 desc->s = DESC_TYPE_CODE_DATA;
1033 desc->dpl = 0;
1034 desc->p = 1;
1035 desc->limit = 0xf;
1036 desc->avl = 0;
1037 desc->l = 0;
1038 desc->d = SEG_OP_SIZE_32BIT;
1039 desc->g = SEG_GRANULARITY_4KB;
1040 desc->base2 = 0x00;
1041
1042 desc++;
1043 desc->limit0 = 0xffff;
1044 desc->base0 = 0x0000;
1045 desc->base1 = 0x0000;
1046 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1047 desc->s = DESC_TYPE_CODE_DATA;
1048 desc->dpl = 0;
1049 desc->p = 1;
1050 desc->limit = 0xf;
1051 desc->avl = 0;
1052 desc->l = 0;
1053 desc->d = SEG_OP_SIZE_32BIT;
1054 desc->g = SEG_GRANULARITY_4KB;
1055 desc->base2 = 0x00;
1056
1057#ifdef CONFIG_X86_64
1058 /* Task segment value */
1059 desc++;
1060 desc->limit0 = 0x0000;
1061 desc->base0 = 0x0000;
1062 desc->base1 = 0x0000;
1063 desc->type = SEG_TYPE_TSS;
1064 desc->s = 0;
1065 desc->dpl = 0;
1066 desc->p = 1;
1067 desc->limit = 0x0;
1068 desc->avl = 0;
1069 desc->l = 0;
1070 desc->d = 0;
1071 desc->g = SEG_GRANULARITY_4KB;
1072 desc->base2 = 0x00;
1073#endif /* CONFIG_X86_64 */
1074
1075 asm volatile ("lidt %0" : : "m" (*idt));
1076 asm volatile ("lgdt %0" : : "m" (*gdt));
1077
1078 asm volatile("cli");
1079
1080 return boot_params;
1081fail:
1082 return NULL;
1083}