projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
x86/efi: Delete misleading efi_printk() error message
[deliverable/linux.git] / arch / x86 / boot / compressed / eboot.c
CommitLineData
291f3632
MF		 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>
dd5fc854 11#include <linux/pci.h>
291f3632
MF		 12#include <asm/efi.h>
13#include <asm/setup.h>
14#include <asm/desc.h>
15
0f905a43
MF		 16#undef memcpy /* Use memcpy from misc.c */
17
291f3632
MF		 18#include "eboot.h"
19
20static efi_system_table_t *sys_table;
21
84be8805
MF		 22static struct efi_config *efi_early;
23
24#define efi_call_early(f, ...) \
25 efi_early->call(efi_early->f, __VA_ARGS__);
204b0a1a 26
54b52d87
MF		 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);
291f3632 50
bd669475 51void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
54b52d87
MF		 52
53static efi_status_t
c116e8d6
MF		 54__file_size32(void *__fh, efi_char16_t *filename_16,
55 void **handle, u64 *file_sz)
56{
57 efi_file_handle_32_t *h, *fh = __fh;
58 efi_file_info_t *info;
59 efi_status_t status;
60 efi_guid_t info_guid = EFI_FILE_INFO_ID;
61 u32 info_sz;
62
63 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
64 EFI_FILE_MODE_READ, (u64)0);
65 if (status != EFI_SUCCESS) {
66 efi_printk(sys_table, "Failed to open file: ");
67 efi_char16_printk(sys_table, filename_16);
68 efi_printk(sys_table, "\n");
69 return status;
70 }
71
72 *handle = h;
73
74 info_sz = 0;
75 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
76 &info_sz, NULL);
77 if (status != EFI_BUFFER_TOO_SMALL) {
78 efi_printk(sys_table, "Failed to get file info size\n");
79 return status;
80 }
81
82grow:
204b0a1a
MF		 83 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
84 info_sz, (void **)&info);
c116e8d6
MF		 85 if (status != EFI_SUCCESS) {
86 efi_printk(sys_table, "Failed to alloc mem for file info\n");
87 return status;
88 }
89
90 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
91 &info_sz, info);
92 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a 93 efi_call_early(free_pool, info);
c116e8d6
MF		 94 goto grow;
95 }
96
97 *file_sz = info->file_size;
204b0a1a 98 efi_call_early(free_pool, info);
c116e8d6
MF		 99
100 if (status != EFI_SUCCESS)
101 efi_printk(sys_table, "Failed to get initrd info\n");
102
103 return status;
104}
105
106static efi_status_t
107__file_size64(void *__fh, efi_char16_t *filename_16,
108 void **handle, u64 *file_sz)
54b52d87 109{
c116e8d6 110 efi_file_handle_64_t *h, *fh = __fh;
54b52d87
MF		 111 efi_file_info_t *info;
112 efi_status_t status;
113 efi_guid_t info_guid = EFI_FILE_INFO_ID;
396f1a08 114 u64 info_sz;
54b52d87
MF		 115
116 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
117 EFI_FILE_MODE_READ, (u64)0);
118 if (status != EFI_SUCCESS) {
119 efi_printk(sys_table, "Failed to open file: ");
120 efi_char16_printk(sys_table, filename_16);
121 efi_printk(sys_table, "\n");
122 return status;
123 }
124
125 *handle = h;
126
127 info_sz = 0;
128 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
129 &info_sz, NULL);
130 if (status != EFI_BUFFER_TOO_SMALL) {
131 efi_printk(sys_table, "Failed to get file info size\n");
132 return status;
133 }
134
135grow:
204b0a1a
MF		 136 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
137 info_sz, (void **)&info);
54b52d87
MF		 138 if (status != EFI_SUCCESS) {
139 efi_printk(sys_table, "Failed to alloc mem for file info\n");
140 return status;
141 }
142
143 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
144 &info_sz, info);
145 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a 146 efi_call_early(free_pool, info);
54b52d87
MF		 147 goto grow;
148 }
149
150 *file_sz = info->file_size;
204b0a1a 151 efi_call_early(free_pool, info);
54b52d87
MF		 152
153 if (status != EFI_SUCCESS)
154 efi_printk(sys_table, "Failed to get initrd info\n");
155
156 return status;
157}
bd669475 158efi_status_t
c116e8d6
MF		 159efi_file_size(efi_system_table_t *sys_table, void *__fh,
160 efi_char16_t *filename_16, void **handle, u64 *file_sz)
161{
162 if (efi_early->is64)
163 return __file_size64(__fh, filename_16, handle, file_sz);
164
165 return __file_size32(__fh, filename_16, handle, file_sz);
166}
54b52d87 167
bd669475 168efi_status_t
47514c99 169efi_file_read(void *handle, unsigned long *size, void *addr)
54b52d87 170{
c116e8d6
MF		 171 unsigned long func;
172
173 if (efi_early->is64) {
47514c99 174 efi_file_handle_64_t *fh = handle;
c116e8d6
MF		 175
176 func = (unsigned long)fh->read;
177 return efi_early->call(func, handle, size, addr);
178 } else {
47514c99 179 efi_file_handle_32_t *fh = handle;
c116e8d6
MF		 180
181 func = (unsigned long)fh->read;
182 return efi_early->call(func, handle, size, addr);
183 }
54b52d87
MF		 184}
185
bd669475 186efi_status_t efi_file_close(void *handle)
54b52d87 187{
c116e8d6 188 if (efi_early->is64) {
47514c99 189 efi_file_handle_64_t *fh = handle;
c116e8d6
MF		 190
191 return efi_early->call((unsigned long)fh->close, handle);
192 } else {
47514c99 193 efi_file_handle_32_t *fh = handle;
c116e8d6
MF		 194
195 return efi_early->call((unsigned long)fh->close, handle);
196 }
197}
198
199static inline efi_status_t __open_volume32(void *__image, void **__fh)
200{
201 efi_file_io_interface_t *io;
202 efi_loaded_image_32_t *image = __image;
203 efi_file_handle_32_t *fh;
204 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
205 efi_status_t status;
206 void *handle = (void *)(unsigned long)image->device_handle;
207 unsigned long func;
208
204b0a1a
MF		 209 status = efi_call_early(handle_protocol, handle,
210 &fs_proto, (void **)&io);
c116e8d6
MF		 211 if (status != EFI_SUCCESS) {
212 efi_printk(sys_table, "Failed to handle fs_proto\n");
213 return status;
214 }
215
216 func = (unsigned long)io->open_volume;
217 status = efi_early->call(func, io, &fh);
218 if (status != EFI_SUCCESS)
219 efi_printk(sys_table, "Failed to open volume\n");
291f3632 220
c116e8d6
MF		 221 *__fh = fh;
222 return status;
54b52d87
MF		 223}
224
c116e8d6 225static inline efi_status_t __open_volume64(void *__image, void **__fh)
54b52d87
MF		 226{
227 efi_file_io_interface_t *io;
c116e8d6
MF		 228 efi_loaded_image_64_t *image = __image;
229 efi_file_handle_64_t *fh;
54b52d87
MF		 230 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
231 efi_status_t status;
232 void *handle = (void *)(unsigned long)image->device_handle;
c116e8d6 233 unsigned long func;
54b52d87 234
204b0a1a
MF		 235 status = efi_call_early(handle_protocol, handle,
236 &fs_proto, (void **)&io);
54b52d87
MF		 237 if (status != EFI_SUCCESS) {
238 efi_printk(sys_table, "Failed to handle fs_proto\n");
239 return status;
240 }
291f3632 241
54b52d87
MF		 242 func = (unsigned long)io->open_volume;
243 status = efi_early->call(func, io, &fh);
244 if (status != EFI_SUCCESS)
245 efi_printk(sys_table, "Failed to open volume\n");
246
247 *__fh = fh;
248 return status;
249}
250
bd669475 251efi_status_t
c116e8d6
MF		 252efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
253{
254 if (efi_early->is64)
255 return __open_volume64(__image, __fh);
256
257 return __open_volume32(__image, __fh);
258}
259
bd669475 260void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
54b52d87 261{
54b52d87
MF		 262 unsigned long output_string;
263 size_t offset;
54b52d87 264
c116e8d6
MF		 265 if (efi_early->is64) {
266 struct efi_simple_text_output_protocol_64 *out;
267 u64 *func;
54b52d87 268
c116e8d6
MF		 269 offset = offsetof(typeof(*out), output_string);
270 output_string = efi_early->text_output + offset;
271 func = (u64 *)output_string;
272
273 efi_early->call(*func, efi_early->text_output, str);
274 } else {
275 struct efi_simple_text_output_protocol_32 *out;
276 u32 *func;
277
278 offset = offsetof(typeof(*out), output_string);
279 output_string = efi_early->text_output + offset;
280 func = (u32 *)output_string;
281
282 efi_early->call(*func, efi_early->text_output, str);
283 }
54b52d87
MF		 284}
285
84be8805
MF		 286#include "../../../../drivers/firmware/efi/libstub/efi-stub-helper.c"
287
291f3632
MF		 288static void find_bits(unsigned long mask, u8 *pos, u8 *size)
289{
290 u8 first, len;
291
292 first = 0;
293 len = 0;
294
295 if (mask) {
296 while (!(mask & 0x1)) {
297 mask = mask >> 1;
298 first++;
299 }
300
301 while (mask & 0x1) {
302 mask = mask >> 1;
303 len++;
304 }
305 }
306
307 *pos = first;
308 *size = len;
309}
310
c116e8d6
MF		 311static efi_status_t
312__setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
dd5fc854 313{
c116e8d6 314 struct pci_setup_rom *rom = NULL;
dd5fc854 315 efi_status_t status;
c116e8d6
MF		 316 unsigned long size;
317 uint64_t attributes;
dd5fc854 318
c116e8d6
MF		 319 status = efi_early->call(pci->attributes, pci,
320 EfiPciIoAttributeOperationGet, 0, 0,
321 &attributes);
322 if (status != EFI_SUCCESS)
323 return status;
dd5fc854 324
c116e8d6
MF		 325 if (!pci->romimage || !pci->romsize)
326 return EFI_INVALID_PARAMETER;
dd5fc854 327
c116e8d6 328 size = pci->romsize + sizeof(*rom);
dd5fc854 329
204b0a1a 330 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
c116e8d6
MF		 331 if (status != EFI_SUCCESS)
332 return status;
dd5fc854 333
c116e8d6
MF		 334 memset(rom, 0, sizeof(*rom));
335
336 rom->data.type = SETUP_PCI;
337 rom->data.len = size - sizeof(struct setup_data);
338 rom->data.next = 0;
339 rom->pcilen = pci->romsize;
340 *__rom = rom;
341
342 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
343 PCI_VENDOR_ID, 1, &(rom->vendor));
dd5fc854
MG		 344
345 if (status != EFI_SUCCESS)
c116e8d6
MF		 346 goto free_struct;
347
348 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
349 PCI_DEVICE_ID, 1, &(rom->devid));
350
351 if (status != EFI_SUCCESS)
352 goto free_struct;
353
354 status = efi_early->call(pci->get_location, pci, &(rom->segment),
355 &(rom->bus), &(rom->device), &(rom->function));
356
357 if (status != EFI_SUCCESS)
358 goto free_struct;
359
360 memcpy(rom->romdata, pci->romimage, pci->romsize);
361 return status;
362
363free_struct:
204b0a1a 364 efi_call_early(free_pool, rom);
c116e8d6
MF		 365 return status;
366}
367
56394ab8 368static void
c116e8d6
MF		 369setup_efi_pci32(struct boot_params *params, void **pci_handle,
370 unsigned long size)
371{
372 efi_pci_io_protocol_32 *pci = NULL;
373 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
374 u32 *handles = (u32 *)(unsigned long)pci_handle;
375 efi_status_t status;
376 unsigned long nr_pci;
377 struct setup_data *data;
378 int i;
379
380 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
381
382 while (data && data->next)
383 data = (struct setup_data *)(unsigned long)data->next;
dd5fc854 384
c116e8d6 385 nr_pci = size / sizeof(u32);
dd5fc854 386 for (i = 0; i < nr_pci; i++) {
c116e8d6
MF		 387 struct pci_setup_rom *rom = NULL;
388 u32 h = handles[i];
dd5fc854 389
204b0a1a
MF		 390 status = efi_call_early(handle_protocol, h,
391 &pci_proto, (void **)&pci);
dd5fc854
MG		 392
393 if (status != EFI_SUCCESS)
394 continue;
395
396 if (!pci)
397 continue;
398
c116e8d6 399 status = __setup_efi_pci32(pci, &rom);
dd5fc854
MG		 400 if (status != EFI_SUCCESS)
401 continue;
402
c116e8d6
MF		 403 if (data)
404 data->next = (unsigned long)rom;
405 else
406 params->hdr.setup_data = (unsigned long)rom;
407
408 data = (struct setup_data *)rom;
dd5fc854 409
c116e8d6 410 }
c116e8d6 411}
dd5fc854 412
c116e8d6
MF		 413static efi_status_t
414__setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
415{
416 struct pci_setup_rom *rom;
417 efi_status_t status;
418 unsigned long size;
419 uint64_t attributes;
dd5fc854 420
c116e8d6
MF		 421 status = efi_early->call(pci->attributes, pci,
422 EfiPciIoAttributeOperationGet, 0,
423 &attributes);
424 if (status != EFI_SUCCESS)
425 return status;
dd5fc854 426
c116e8d6
MF		 427 if (!pci->romimage || !pci->romsize)
428 return EFI_INVALID_PARAMETER;
dd5fc854 429
c116e8d6 430 size = pci->romsize + sizeof(*rom);
dd5fc854 431
204b0a1a 432 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
c116e8d6
MF		 433 if (status != EFI_SUCCESS)
434 return status;
435
436 rom->data.type = SETUP_PCI;
437 rom->data.len = size - sizeof(struct setup_data);
438 rom->data.next = 0;
439 rom->pcilen = pci->romsize;
440 *__rom = rom;
441
442 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
443 PCI_VENDOR_ID, 1, &(rom->vendor));
444
445 if (status != EFI_SUCCESS)
446 goto free_struct;
447
448 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
449 PCI_DEVICE_ID, 1, &(rom->devid));
450
451 if (status != EFI_SUCCESS)
452 goto free_struct;
453
454 status = efi_early->call(pci->get_location, pci, &(rom->segment),
455 &(rom->bus), &(rom->device), &(rom->function));
456
457 if (status != EFI_SUCCESS)
458 goto free_struct;
459
460 memcpy(rom->romdata, pci->romimage, pci->romsize);
461 return status;
462
463free_struct:
204b0a1a 464 efi_call_early(free_pool, rom);
c116e8d6
MF		 465 return status;
466
467}
468
56394ab8 469static void
c116e8d6
MF		 470setup_efi_pci64(struct boot_params *params, void **pci_handle,
471 unsigned long size)
472{
473 efi_pci_io_protocol_64 *pci = NULL;
474 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
475 u64 *handles = (u64 *)(unsigned long)pci_handle;
476 efi_status_t status;
477 unsigned long nr_pci;
478 struct setup_data *data;
479 int i;
dd5fc854 480
c116e8d6
MF		 481 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
482
483 while (data && data->next)
484 data = (struct setup_data *)(unsigned long)data->next;
485
486 nr_pci = size / sizeof(u64);
487 for (i = 0; i < nr_pci; i++) {
488 struct pci_setup_rom *rom = NULL;
489 u64 h = handles[i];
490
204b0a1a
MF		 491 status = efi_call_early(handle_protocol, h,
492 &pci_proto, (void **)&pci);
dd5fc854
MG		 493
494 if (status != EFI_SUCCESS)
c116e8d6
MF		 495 continue;
496
497 if (!pci)
498 continue;
dd5fc854 499
c116e8d6
MF		 500 status = __setup_efi_pci64(pci, &rom);
501 if (status != EFI_SUCCESS)
502 continue;
dd5fc854
MG		 503
504 if (data)
bc754790 505 data->next = (unsigned long)rom;
dd5fc854 506 else
bc754790 507 params->hdr.setup_data = (unsigned long)rom;
dd5fc854
MG		 508
509 data = (struct setup_data *)rom;
510
dd5fc854 511 }
dd5fc854
MG		 512}
513
56394ab8
MF		 514/*
515 * There's no way to return an informative status from this function,
516 * because any analysis (and printing of error messages) needs to be
517 * done directly at the EFI function call-site.
518 *
519 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
520 * just didn't find any PCI devices, but there's no way to tell outside
521 * the context of the call.
522 */
523static void setup_efi_pci(struct boot_params *params)
291f3632 524{
291f3632 525 efi_status_t status;
c116e8d6
MF		 526 void **pci_handle = NULL;
527 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
528 unsigned long size = 0;
291f3632 529
204b0a1a
MF		 530 status = efi_call_early(locate_handle,
531 EFI_LOCATE_BY_PROTOCOL,
532 &pci_proto, NULL, &size, pci_handle);
291f3632 533
c116e8d6 534 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a
MF		 535 status = efi_call_early(allocate_pool,
536 EFI_LOADER_DATA,
537 size, (void **)&pci_handle);
291f3632 538
291f3632 539 if (status != EFI_SUCCESS)
56394ab8 540 return;
291f3632 541
204b0a1a
MF		 542 status = efi_call_early(locate_handle,
543 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
544 NULL, &size, pci_handle);
291f3632
MF		 545 }
546
c116e8d6 547 if (status != EFI_SUCCESS)
291f3632
MF		 548 goto free_handle;
549
c116e8d6 550 if (efi_early->is64)
56394ab8 551 setup_efi_pci64(params, pci_handle, size);
c116e8d6 552 else
56394ab8 553 setup_efi_pci32(params, pci_handle, size);
291f3632 554
c116e8d6 555free_handle:
204b0a1a 556 efi_call_early(free_pool, pci_handle);
c116e8d6 557}
291f3632 558
c116e8d6
MF		 559static void
560setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
561 struct efi_pixel_bitmask pixel_info, int pixel_format)
562{
291f3632
MF		 563 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
564 si->lfb_depth = 32;
565 si->lfb_linelength = pixels_per_scan_line * 4;
566 si->red_size = 8;
567 si->red_pos = 0;
568 si->green_size = 8;
569 si->green_pos = 8;
570 si->blue_size = 8;
571 si->blue_pos = 16;
572 si->rsvd_size = 8;
573 si->rsvd_pos = 24;
574 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
575 si->lfb_depth = 32;
576 si->lfb_linelength = pixels_per_scan_line * 4;
577 si->red_size = 8;
578 si->red_pos = 16;
579 si->green_size = 8;
580 si->green_pos = 8;
581 si->blue_size = 8;
582 si->blue_pos = 0;
583 si->rsvd_size = 8;
584 si->rsvd_pos = 24;
585 } else if (pixel_format == PIXEL_BIT_MASK) {
586 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
587 find_bits(pixel_info.green_mask, &si->green_pos,
588 &si->green_size);
589 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
590 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
591 &si->rsvd_size);
592 si->lfb_depth = si->red_size + si->green_size +
593 si->blue_size + si->rsvd_size;
594 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
595 } else {
596 si->lfb_depth = 4;
597 si->lfb_linelength = si->lfb_width / 2;
598 si->red_size = 0;
599 si->red_pos = 0;
600 si->green_size = 0;
601 si->green_pos = 0;
602 si->blue_size = 0;
603 si->blue_pos = 0;
604 si->rsvd_size = 0;
605 si->rsvd_pos = 0;
606 }
c116e8d6
MF		 607}
608
609static efi_status_t
610__gop_query32(struct efi_graphics_output_protocol_32 *gop32,
611 struct efi_graphics_output_mode_info **info,
612 unsigned long *size, u32 *fb_base)
613{
614 struct efi_graphics_output_protocol_mode_32 *mode;
615 efi_status_t status;
616 unsigned long m;
617
618 m = gop32->mode;
619 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
620
621 status = efi_early->call(gop32->query_mode, gop32,
622 mode->mode, size, info);
623 if (status != EFI_SUCCESS)
624 return status;
625
626 *fb_base = mode->frame_buffer_base;
627 return status;
628}
629
630static efi_status_t
631setup_gop32(struct screen_info *si, efi_guid_t *proto,
632 unsigned long size, void **gop_handle)
633{
634 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
635 unsigned long nr_gops;
636 u16 width, height;
637 u32 pixels_per_scan_line;
638 u32 fb_base;
639 struct efi_pixel_bitmask pixel_info;
640 int pixel_format;
641 efi_status_t status;
642 u32 *handles = (u32 *)(unsigned long)gop_handle;
643 int i;
644
645 first_gop = NULL;
646 gop32 = NULL;
647
648 nr_gops = size / sizeof(u32);
649 for (i = 0; i < nr_gops; i++) {
650 struct efi_graphics_output_mode_info *info = NULL;
651 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
652 bool conout_found = false;
653 void *dummy = NULL;
654 u32 h = handles[i];
655
204b0a1a
MF		 656 status = efi_call_early(handle_protocol, h,
657 proto, (void **)&gop32);
c116e8d6
MF		 658 if (status != EFI_SUCCESS)
659 continue;
660
204b0a1a
MF		 661 status = efi_call_early(handle_protocol, h,
662 &conout_proto, &dummy);
c116e8d6
MF		 663 if (status == EFI_SUCCESS)
664 conout_found = true;
665
666 status = __gop_query32(gop32, &info, &size, &fb_base);
667 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
668 /*
669 * Systems that use the UEFI Console Splitter may
670 * provide multiple GOP devices, not all of which are
671 * backed by real hardware. The workaround is to search
672 * for a GOP implementing the ConOut protocol, and if
673 * one isn't found, to just fall back to the first GOP.
674 */
675 width = info->horizontal_resolution;
676 height = info->vertical_resolution;
677 pixel_format = info->pixel_format;
678 pixel_info = info->pixel_information;
679 pixels_per_scan_line = info->pixels_per_scan_line;
680
681 /*
682 * Once we've found a GOP supporting ConOut,
683 * don't bother looking any further.
684 */
685 first_gop = gop32;
686 if (conout_found)
687 break;
688 }
689 }
690
691 /* Did we find any GOPs? */
692 if (!first_gop)
693 goto out;
694
695 /* EFI framebuffer */
696 si->orig_video_isVGA = VIDEO_TYPE_EFI;
697
698 si->lfb_width = width;
699 si->lfb_height = height;
700 si->lfb_base = fb_base;
701 si->pages = 1;
702
703 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
291f3632 704
e9b10953
MG		 705 si->lfb_size = si->lfb_linelength * si->lfb_height;
706
f462ed93 707 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
c116e8d6
MF		 708out:
709 return status;
710}
f462ed93 711
c116e8d6
MF		 712static efi_status_t
713__gop_query64(struct efi_graphics_output_protocol_64 *gop64,
714 struct efi_graphics_output_mode_info **info,
715 unsigned long *size, u32 *fb_base)
716{
717 struct efi_graphics_output_protocol_mode_64 *mode;
718 efi_status_t status;
719 unsigned long m;
720
721 m = gop64->mode;
722 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
723
724 status = efi_early->call(gop64->query_mode, gop64,
725 mode->mode, size, info);
726 if (status != EFI_SUCCESS)
727 return status;
728
729 *fb_base = mode->frame_buffer_base;
730 return status;
731}
732
733static efi_status_t
734setup_gop64(struct screen_info *si, efi_guid_t *proto,
735 unsigned long size, void **gop_handle)
736{
737 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
738 unsigned long nr_gops;
739 u16 width, height;
740 u32 pixels_per_scan_line;
741 u32 fb_base;
742 struct efi_pixel_bitmask pixel_info;
743 int pixel_format;
744 efi_status_t status;
745 u64 *handles = (u64 *)(unsigned long)gop_handle;
746 int i;
747
748 first_gop = NULL;
749 gop64 = NULL;
750
751 nr_gops = size / sizeof(u64);
752 for (i = 0; i < nr_gops; i++) {
753 struct efi_graphics_output_mode_info *info = NULL;
754 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
755 bool conout_found = false;
756 void *dummy = NULL;
757 u64 h = handles[i];
758
204b0a1a
MF		 759 status = efi_call_early(handle_protocol, h,
760 proto, (void **)&gop64);
c116e8d6
MF		 761 if (status != EFI_SUCCESS)
762 continue;
763
204b0a1a
MF		 764 status = efi_call_early(handle_protocol, h,
765 &conout_proto, &dummy);
c116e8d6
MF		 766 if (status == EFI_SUCCESS)
767 conout_found = true;
768
769 status = __gop_query64(gop64, &info, &size, &fb_base);
770 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
771 /*
772 * Systems that use the UEFI Console Splitter may
773 * provide multiple GOP devices, not all of which are
774 * backed by real hardware. The workaround is to search
775 * for a GOP implementing the ConOut protocol, and if
776 * one isn't found, to just fall back to the first GOP.
777 */
778 width = info->horizontal_resolution;
779 height = info->vertical_resolution;
780 pixel_format = info->pixel_format;
781 pixel_info = info->pixel_information;
782 pixels_per_scan_line = info->pixels_per_scan_line;
783
784 /*
785 * Once we've found a GOP supporting ConOut,
786 * don't bother looking any further.
787 */
788 first_gop = gop64;
789 if (conout_found)
790 break;
791 }
792 }
793
794 /* Did we find any GOPs? */
795 if (!first_gop)
796 goto out;
797
798 /* EFI framebuffer */
799 si->orig_video_isVGA = VIDEO_TYPE_EFI;
800
801 si->lfb_width = width;
802 si->lfb_height = height;
803 si->lfb_base = fb_base;
804 si->pages = 1;
805
806 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
807
808 si->lfb_size = si->lfb_linelength * si->lfb_height;
809
810 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
811out:
291f3632
MF		 812 return status;
813}
814
815/*
c116e8d6 816 * See if we have Graphics Output Protocol
291f3632 817 */
c116e8d6 818static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
291f3632
MF		 819 unsigned long size)
820{
291f3632 821 efi_status_t status;
c116e8d6 822 void **gop_handle = NULL;
291f3632 823
204b0a1a
MF		 824 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
825 size, (void **)&gop_handle);
291f3632
MF		 826 if (status != EFI_SUCCESS)
827 return status;
828
204b0a1a
MF		 829 status = efi_call_early(locate_handle,
830 EFI_LOCATE_BY_PROTOCOL,
831 proto, NULL, &size, gop_handle);
291f3632
MF		 832 if (status != EFI_SUCCESS)
833 goto free_handle;
834
c116e8d6
MF		 835 if (efi_early->is64)
836 status = setup_gop64(si, proto, size, gop_handle);
837 else
838 status = setup_gop32(si, proto, size, gop_handle);
839
840free_handle:
204b0a1a 841 efi_call_early(free_pool, gop_handle);
c116e8d6
MF		 842 return status;
843}
844
845static efi_status_t
846setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
847{
848 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
849 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
850 unsigned long nr_ugas;
851 u32 *handles = (u32 *)uga_handle;;
852 efi_status_t status;
853 int i;
854
291f3632 855 first_uga = NULL;
c116e8d6
MF		 856 nr_ugas = size / sizeof(u32);
857 for (i = 0; i < nr_ugas; i++) {
858 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
859 u32 w, h, depth, refresh;
860 void *pciio;
861 u32 handle = handles[i];
862
204b0a1a
MF		 863 status = efi_call_early(handle_protocol, handle,
864 &uga_proto, (void **)&uga);
c116e8d6
MF		 865 if (status != EFI_SUCCESS)
866 continue;
867
204b0a1a 868 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
c116e8d6
MF		 869
870 status = efi_early->call((unsigned long)uga->get_mode, uga,
871 &w, &h, &depth, &refresh);
872 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
873 *width = w;
874 *height = h;
875
876 /*
877 * Once we've found a UGA supporting PCIIO,
878 * don't bother looking any further.
879 */
880 if (pciio)
881 break;
882
883 first_uga = uga;
884 }
885 }
886
887 return status;
888}
291f3632 889
c116e8d6
MF		 890static efi_status_t
891setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
892{
893 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
894 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
895 unsigned long nr_ugas;
896 u64 *handles = (u64 *)uga_handle;;
897 efi_status_t status;
898 int i;
899
900 first_uga = NULL;
901 nr_ugas = size / sizeof(u64);
291f3632
MF		 902 for (i = 0; i < nr_ugas; i++) {
903 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
291f3632
MF		 904 u32 w, h, depth, refresh;
905 void *pciio;
c116e8d6 906 u64 handle = handles[i];
291f3632 907
204b0a1a
MF		 908 status = efi_call_early(handle_protocol, handle,
909 &uga_proto, (void **)&uga);
291f3632
MF		 910 if (status != EFI_SUCCESS)
911 continue;
912
204b0a1a 913 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
291f3632 914
54b52d87
MF		 915 status = efi_early->call((unsigned long)uga->get_mode, uga,
916 &w, &h, &depth, &refresh);
291f3632 917 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
c116e8d6
MF		 918 *width = w;
919 *height = h;
291f3632
MF		 920
921 /*
922 * Once we've found a UGA supporting PCIIO,
923 * don't bother looking any further.
924 */
925 if (pciio)
926 break;
927
928 first_uga = uga;
929 }
930 }
931
c116e8d6
MF		 932 return status;
933}
934
935/*
936 * See if we have Universal Graphics Adapter (UGA) protocol
937 */
938static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
939 unsigned long size)
940{
941 efi_status_t status;
942 u32 width, height;
943 void **uga_handle = NULL;
944
204b0a1a
MF		 945 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
946 size, (void **)&uga_handle);
c116e8d6
MF		 947 if (status != EFI_SUCCESS)
948 return status;
949
204b0a1a
MF		 950 status = efi_call_early(locate_handle,
951 EFI_LOCATE_BY_PROTOCOL,
952 uga_proto, NULL, &size, uga_handle);
c116e8d6
MF		 953 if (status != EFI_SUCCESS)
954 goto free_handle;
955
956 height = 0;
957 width = 0;
958
959 if (efi_early->is64)
960 status = setup_uga64(uga_handle, size, &width, &height);
961 else
962 status = setup_uga32(uga_handle, size, &width, &height);
963
964 if (!width && !height)
291f3632
MF		 965 goto free_handle;
966
967 /* EFI framebuffer */
968 si->orig_video_isVGA = VIDEO_TYPE_EFI;
969
970 si->lfb_depth = 32;
971 si->lfb_width = width;
972 si->lfb_height = height;
973
974 si->red_size = 8;
975 si->red_pos = 16;
976 si->green_size = 8;
977 si->green_pos = 8;
978 si->blue_size = 8;
979 si->blue_pos = 0;
980 si->rsvd_size = 8;
981 si->rsvd_pos = 24;
982
291f3632 983free_handle:
204b0a1a 984 efi_call_early(free_pool, uga_handle);
291f3632
MF		 985 return status;
986}
987
988void setup_graphics(struct boot_params *boot_params)
989{
990 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
991 struct screen_info *si;
992 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
993 efi_status_t status;
994 unsigned long size;
995 void **gop_handle = NULL;
996 void **uga_handle = NULL;
997
998 si = &boot_params->screen_info;
999 memset(si, 0, sizeof(*si));
1000
1001 size = 0;
204b0a1a
MF		 1002 status = efi_call_early(locate_handle,
1003 EFI_LOCATE_BY_PROTOCOL,
1004 &graphics_proto, NULL, &size, gop_handle);
291f3632
MF		 1005 if (status == EFI_BUFFER_TOO_SMALL)
1006 status = setup_gop(si, &graphics_proto, size);
1007
1008 if (status != EFI_SUCCESS) {
1009 size = 0;
204b0a1a
MF		 1010 status = efi_call_early(locate_handle,
1011 EFI_LOCATE_BY_PROTOCOL,
1012 &uga_proto, NULL, &size, uga_handle);
291f3632
MF		 1013 if (status == EFI_BUFFER_TOO_SMALL)
1014 setup_uga(si, &uga_proto, size);
1015 }
1016}
1017
291f3632
MF		 1018/*
1019 * Because the x86 boot code expects to be passed a boot_params we
1020 * need to create one ourselves (usually the bootloader would create
1021 * one for us).
7e8213c1
MF		 1022 *
1023 * The caller is responsible for filling out ->code32_start in the
1024 * returned boot_params.
291f3632 1025 */
54b52d87 1026struct boot_params *make_boot_params(struct efi_config *c)
291f3632 1027{
9ca8f72a
MF		 1028 struct boot_params *boot_params;
1029 struct sys_desc_table *sdt;
1030 struct apm_bios_info *bi;
1031 struct setup_header *hdr;
1032 struct efi_info *efi;
1033 efi_loaded_image_t *image;
54b52d87 1034 void *options, *handle;
9ca8f72a 1035 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
291f3632
MF		 1036 int options_size = 0;
1037 efi_status_t status;
5fef3870 1038 char *cmdline_ptr;
291f3632
MF		 1039 u16 *s2;
1040 u8 *s1;
1041 int i;
46f4582e
RF		 1042 unsigned long ramdisk_addr;
1043 unsigned long ramdisk_size;
291f3632 1044
54b52d87
MF		 1045 efi_early = c;
1046 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1047 handle = (void *)(unsigned long)efi_early->image_handle;
9ca8f72a
MF		 1048
1049 /* Check if we were booted by the EFI firmware */
1050 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1051 return NULL;
1052
54b52d87
MF		 1053 if (efi_early->is64)
1054 setup_boot_services64(efi_early);
1055 else
1056 setup_boot_services32(efi_early);
1057
204b0a1a
MF		 1058 status = efi_call_early(handle_protocol, handle,
1059 &proto, (void *)&image);
9ca8f72a 1060 if (status != EFI_SUCCESS) {
876dc36a 1061 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
9ca8f72a
MF		 1062 return NULL;
1063 }
1064
40e4530a
RF		 1065 status = efi_low_alloc(sys_table, 0x4000, 1,
1066 (unsigned long *)&boot_params);
9ca8f72a 1067 if (status != EFI_SUCCESS) {
876dc36a 1068 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
9ca8f72a
MF		 1069 return NULL;
1070 }
1071
1072 memset(boot_params, 0x0, 0x4000);
1073
1074 hdr = &boot_params->hdr;
1075 efi = &boot_params->efi_info;
1076 bi = &boot_params->apm_bios_info;
1077 sdt = &boot_params->sys_desc_table;
1078
1079 /* Copy the second sector to boot_params */
1080 memcpy(&hdr->jump, image->image_base + 512, 512);
1081
1082 /*
1083 * Fill out some of the header fields ourselves because the
1084 * EFI firmware loader doesn't load the first sector.
1085 */
1086 hdr->root_flags = 1;
1087 hdr->vid_mode = 0xffff;
1088 hdr->boot_flag = 0xAA55;
1089
291f3632
MF		 1090 hdr->type_of_loader = 0x21;
1091
1092 /* Convert unicode cmdline to ascii */
c625d1c2 1093 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
5fef3870
RF		 1094 if (!cmdline_ptr)
1095 goto fail;
1096 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
291f3632
MF		 1097
1098 hdr->ramdisk_image = 0;
1099 hdr->ramdisk_size = 0;
1100
291f3632
MF		 1101 /* Clear APM BIOS info */
1102 memset(bi, 0, sizeof(*bi));
1103
1104 memset(sdt, 0, sizeof(*sdt));
1105
46f4582e
RF		 1106 status = handle_cmdline_files(sys_table, image,
1107 (char *)(unsigned long)hdr->cmd_line_ptr,
47226ad4 1108 "initrd=", hdr->initrd_addr_max,
46f4582e 1109 &ramdisk_addr, &ramdisk_size);
47226ad4
YL		 1110
1111 if (status != EFI_SUCCESS &&
1112 hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
1113 efi_printk(sys_table, "Trying to load files to higher address\n");
1114 status = handle_cmdline_files(sys_table, image,
1115 (char *)(unsigned long)hdr->cmd_line_ptr,
1116 "initrd=", -1UL,
1117 &ramdisk_addr, &ramdisk_size);
1118 }
1119
9ca8f72a
MF		 1120 if (status != EFI_SUCCESS)
1121 goto fail2;
4bf7111f
YL		 1122 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
1123 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
1124 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
1125 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
9ca8f72a
MF		 1126
1127 return boot_params;
1128fail2:
0e1cadb0 1129 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
9ca8f72a 1130fail:
40e4530a 1131 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
9ca8f72a
MF		 1132 return NULL;
1133}
1134
d2078d5a
LC		 1135static void add_e820ext(struct boot_params *params,
1136 struct setup_data *e820ext, u32 nr_entries)
9ca8f72a 1137{
d2078d5a 1138 struct setup_data *data;
9ca8f72a 1139 efi_status_t status;
d2078d5a 1140 unsigned long size;
291f3632 1141
d2078d5a
LC		 1142 e820ext->type = SETUP_E820_EXT;
1143 e820ext->len = nr_entries * sizeof(struct e820entry);
1144 e820ext->next = 0;
291f3632 1145
d2078d5a 1146 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
291f3632 1147
d2078d5a
LC		 1148 while (data && data->next)
1149 data = (struct setup_data *)(unsigned long)data->next;
d3768d88 1150
d2078d5a
LC		 1151 if (data)
1152 data->next = (unsigned long)e820ext;
1153 else
1154 params->hdr.setup_data = (unsigned long)e820ext;
1155}
291f3632 1156
d2078d5a
LC		 1157static efi_status_t setup_e820(struct boot_params *params,
1158 struct setup_data *e820ext, u32 e820ext_size)
1159{
1160 struct e820entry *e820_map = &params->e820_map[0];
1161 struct efi_info *efi = &params->efi_info;
1162 struct e820entry *prev = NULL;
1163 u32 nr_entries;
1164 u32 nr_desc;
1165 int i;
291f3632 1166
291f3632 1167 nr_entries = 0;
d2078d5a
LC		 1168 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1169
1170 for (i = 0; i < nr_desc; i++) {
291f3632
MF		 1171 efi_memory_desc_t *d;
1172 unsigned int e820_type = 0;
d2078d5a 1173 unsigned long m = efi->efi_memmap;
291f3632 1174
d2078d5a 1175 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
291f3632
MF		 1176 switch (d->type) {
1177 case EFI_RESERVED_TYPE:
1178 case EFI_RUNTIME_SERVICES_CODE:
1179 case EFI_RUNTIME_SERVICES_DATA:
1180 case EFI_MEMORY_MAPPED_IO:
1181 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1182 case EFI_PAL_CODE:
1183 e820_type = E820_RESERVED;
1184 break;
1185
1186 case EFI_UNUSABLE_MEMORY:
1187 e820_type = E820_UNUSABLE;
1188 break;
1189
1190 case EFI_ACPI_RECLAIM_MEMORY:
1191 e820_type = E820_ACPI;
1192 break;
1193
1194 case EFI_LOADER_CODE:
1195 case EFI_LOADER_DATA:
1196 case EFI_BOOT_SERVICES_CODE:
1197 case EFI_BOOT_SERVICES_DATA:
1198 case EFI_CONVENTIONAL_MEMORY:
1199 e820_type = E820_RAM;
1200 break;
1201
1202 case EFI_ACPI_MEMORY_NVS:
1203 e820_type = E820_NVS;
1204 break;
1205
1206 default:
1207 continue;
1208 }
1209
1210 /* Merge adjacent mappings */
1211 if (prev && prev->type == e820_type &&
d2078d5a 1212 (prev->addr + prev->size) == d->phys_addr) {
291f3632 1213 prev->size += d->num_pages << 12;
d2078d5a 1214 continue;
291f3632 1215 }
d2078d5a
LC		 1216
1217 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1218 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1219 sizeof(struct setup_data);
1220
1221 if (!e820ext || e820ext_size < need)
1222 return EFI_BUFFER_TOO_SMALL;
1223
1224 /* boot_params map full, switch to e820 extended */
1225 e820_map = (struct e820entry *)e820ext->data;
1226 }
1227
1228 e820_map->addr = d->phys_addr;
1229 e820_map->size = d->num_pages << PAGE_SHIFT;
1230 e820_map->type = e820_type;
1231 prev = e820_map++;
1232 nr_entries++;
291f3632
MF		 1233 }
1234
d2078d5a
LC		 1235 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1236 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1237
1238 add_e820ext(params, e820ext, nr_e820ext);
1239 nr_entries -= nr_e820ext;
1240 }
1241
1242 params->e820_entries = (u8)nr_entries;
1243
1244 return EFI_SUCCESS;
1245}
1246
1247static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1248 u32 *e820ext_size)
1249{
1250 efi_status_t status;
1251 unsigned long size;
1252
1253 size = sizeof(struct setup_data) +
1254 sizeof(struct e820entry) * nr_desc;
1255
1256 if (*e820ext) {
204b0a1a 1257 efi_call_early(free_pool, *e820ext);
d2078d5a
LC		 1258 *e820ext = NULL;
1259 *e820ext_size = 0;
1260 }
1261
204b0a1a
MF		 1262 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1263 size, (void **)e820ext);
d2078d5a
LC		 1264 if (status == EFI_SUCCESS)
1265 *e820ext_size = size;
1266
1267 return status;
1268}
1269
1270static efi_status_t exit_boot(struct boot_params *boot_params,
b8ff87a6 1271 void *handle, bool is64)
d2078d5a
LC		 1272{
1273 struct efi_info *efi = &boot_params->efi_info;
1274 unsigned long map_sz, key, desc_size;
1275 efi_memory_desc_t *mem_map;
1276 struct setup_data *e820ext;
b8ff87a6 1277 const char *signature;
d2078d5a
LC		 1278 __u32 e820ext_size;
1279 __u32 nr_desc, prev_nr_desc;
1280 efi_status_t status;
1281 __u32 desc_version;
1282 bool called_exit = false;
1283 u8 nr_entries;
1284 int i;
1285
1286 nr_desc = 0;
1287 e820ext = NULL;
1288 e820ext_size = 0;
1289
1290get_map:
1291 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1292 &desc_version, &key);
1293
1294 if (status != EFI_SUCCESS)
1295 return status;
1296
1297 prev_nr_desc = nr_desc;
1298 nr_desc = map_sz / desc_size;
1299 if (nr_desc > prev_nr_desc &&
1300 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1301 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1302
1303 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1304 if (status != EFI_SUCCESS)
1305 goto free_mem_map;
1306
204b0a1a 1307 efi_call_early(free_pool, mem_map);
d2078d5a
LC		 1308 goto get_map; /* Allocated memory, get map again */
1309 }
1310
b8ff87a6
MF		 1311 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1312 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1313
d2078d5a
LC		 1314 efi->efi_systab = (unsigned long)sys_table;
1315 efi->efi_memdesc_size = desc_size;
1316 efi->efi_memdesc_version = desc_version;
1317 efi->efi_memmap = (unsigned long)mem_map;
1318 efi->efi_memmap_size = map_sz;
1319
1320#ifdef CONFIG_X86_64
1321 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1322 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1323#endif
1324
1325 /* Might as well exit boot services now */
204b0a1a 1326 status = efi_call_early(exit_boot_services, handle, key);
d2078d5a
LC		 1327 if (status != EFI_SUCCESS) {
1328 /*
1329 * ExitBootServices() will fail if any of the event
1330 * handlers change the memory map. In which case, we
1331 * must be prepared to retry, but only once so that
1332 * we're guaranteed to exit on repeated failures instead
1333 * of spinning forever.
1334 */
1335 if (called_exit)
1336 goto free_mem_map;
1337
1338 called_exit = true;
204b0a1a 1339 efi_call_early(free_pool, mem_map);
d2078d5a
LC		 1340 goto get_map;
1341 }
1342
1343 /* Historic? */
1344 boot_params->alt_mem_k = 32 * 1024;
1345
1346 status = setup_e820(boot_params, e820ext, e820ext_size);
1347 if (status != EFI_SUCCESS)
1348 return status;
291f3632
MF		 1349
1350 return EFI_SUCCESS;
1351
1352free_mem_map:
204b0a1a 1353 efi_call_early(free_pool, mem_map);
291f3632
MF		 1354 return status;
1355}
1356
9ca8f72a
MF		 1357/*
1358 * On success we return a pointer to a boot_params structure, and NULL
1359 * on failure.
1360 */
54b52d87 1361struct boot_params *efi_main(struct efi_config *c,
9ca8f72a
MF		 1362 struct boot_params *boot_params)
1363{
54b52d87 1364 struct desc_ptr *gdt = NULL;
9ca8f72a
MF		 1365 efi_loaded_image_t *image;
1366 struct setup_header *hdr = &boot_params->hdr;
1367 efi_status_t status;
1368 struct desc_struct *desc;
54b52d87
MF		 1369 void *handle;
1370 efi_system_table_t *_table;
1371 bool is64;
1372
1373 efi_early = c;
1374
1375 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1376 handle = (void *)(unsigned long)efi_early->image_handle;
1377 is64 = efi_early->is64;
9ca8f72a
MF		 1378
1379 sys_table = _table;
1380
1381 /* Check if we were booted by the EFI firmware */
1382 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1383 goto fail;
1384
54b52d87
MF		 1385 if (is64)
1386 setup_boot_services64(efi_early);
1387 else
1388 setup_boot_services32(efi_early);
1389
9ca8f72a 1390 setup_graphics(boot_params);
291f3632 1391
56394ab8 1392 setup_efi_pci(boot_params);
dd5fc854 1393
204b0a1a
MF		 1394 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1395 sizeof(*gdt), (void **)&gdt);
9fa7deda 1396 if (status != EFI_SUCCESS) {
876dc36a 1397 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
291f3632 1398 goto fail;
9fa7deda 1399 }
291f3632
MF		 1400
1401 gdt->size = 0x800;
40e4530a 1402 status = efi_low_alloc(sys_table, gdt->size, 8,
876dc36a 1403 (unsigned long *)&gdt->address);
9fa7deda 1404 if (status != EFI_SUCCESS) {
876dc36a 1405 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
291f3632 1406 goto fail;
9fa7deda 1407 }
291f3632 1408
9ca8f72a
MF		 1409 /*
1410 * If the kernel isn't already loaded at the preferred load
1411 * address, relocate it.
1412 */
1413 if (hdr->pref_address != hdr->code32_start) {
4a9f3a7c
RF		 1414 unsigned long bzimage_addr = hdr->code32_start;
1415 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1416 hdr->init_size, hdr->init_size,
1417 hdr->pref_address,
1418 hdr->kernel_alignment);
fb86b244
UW		 1419 if (status != EFI_SUCCESS) {
1420 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
9ca8f72a 1421 goto fail;
fb86b244 1422 }
4a9f3a7c
RF		 1423
1424 hdr->pref_address = hdr->code32_start;
1425 hdr->code32_start = bzimage_addr;
9ca8f72a
MF		 1426 }
1427
b8ff87a6 1428 status = exit_boot(boot_params, handle, is64);
fb86b244
UW		 1429 if (status != EFI_SUCCESS) {
1430 efi_printk(sys_table, "exit_boot() failed!\n");
291f3632 1431 goto fail;
fb86b244 1432 }
291f3632
MF		 1433
1434 memset((char *)gdt->address, 0x0, gdt->size);
1435 desc = (struct desc_struct *)gdt->address;
1436
1437 /* The first GDT is a dummy and the second is unused. */
1438 desc += 2;
1439
1440 desc->limit0 = 0xffff;
1441 desc->base0 = 0x0000;
1442 desc->base1 = 0x0000;
1443 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1444 desc->s = DESC_TYPE_CODE_DATA;
1445 desc->dpl = 0;
1446 desc->p = 1;
1447 desc->limit = 0xf;
1448 desc->avl = 0;
1449 desc->l = 0;
1450 desc->d = SEG_OP_SIZE_32BIT;
1451 desc->g = SEG_GRANULARITY_4KB;
1452 desc->base2 = 0x00;
1453
1454 desc++;
1455 desc->limit0 = 0xffff;
1456 desc->base0 = 0x0000;
1457 desc->base1 = 0x0000;
1458 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1459 desc->s = DESC_TYPE_CODE_DATA;
1460 desc->dpl = 0;
1461 desc->p = 1;
1462 desc->limit = 0xf;
1463 desc->avl = 0;
1464 desc->l = 0;
1465 desc->d = SEG_OP_SIZE_32BIT;
1466 desc->g = SEG_GRANULARITY_4KB;
1467 desc->base2 = 0x00;
1468
1469#ifdef CONFIG_X86_64
1470 /* Task segment value */
1471 desc++;
1472 desc->limit0 = 0x0000;
1473 desc->base0 = 0x0000;
1474 desc->base1 = 0x0000;
1475 desc->type = SEG_TYPE_TSS;
1476 desc->s = 0;
1477 desc->dpl = 0;
1478 desc->p = 1;
1479 desc->limit = 0x0;
1480 desc->avl = 0;
1481 desc->l = 0;
1482 desc->d = 0;
1483 desc->g = SEG_GRANULARITY_4KB;
1484 desc->base2 = 0x00;
1485#endif /* CONFIG_X86_64 */
1486
291f3632 1487 asm volatile("cli");
0ce6cda2 1488 asm volatile ("lgdt %0" : : "m" (*gdt));
291f3632
MF		 1489
1490 return boot_params;
1491fail:
fb86b244 1492 efi_printk(sys_table, "efi_main() failed!\n");
291f3632
MF		 1493 return NULL;
1494}
Linux kernel - Deliverables
This page took 0.224708 seconds and 5 git commands to generate.