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x86/efi: Mark initialization code as such
[linux-2.6-block.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
f23cf8bd 22struct efi_config *efi_early;
204b0a1a 23
54b52d87
MF		 24#define BOOT_SERVICES(bits) \
25static void setup_boot_services##bits(struct efi_config *c) \
26{ \
27 efi_system_table_##bits##_t *table; \
28 efi_boot_services_##bits##_t *bt; \
29 \
30 table = (typeof(table))sys_table; \
31 \
32 c->text_output = table->con_out; \
33 \
34 bt = (typeof(bt))(unsigned long)(table->boottime); \
35 \
36 c->allocate_pool = bt->allocate_pool; \
37 c->allocate_pages = bt->allocate_pages; \
38 c->get_memory_map = bt->get_memory_map; \
39 c->free_pool = bt->free_pool; \
40 c->free_pages = bt->free_pages; \
41 c->locate_handle = bt->locate_handle; \
42 c->handle_protocol = bt->handle_protocol; \
43 c->exit_boot_services = bt->exit_boot_services; \
44}
45BOOT_SERVICES(32);
46BOOT_SERVICES(64);
291f3632 47
bd669475 48void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
54b52d87
MF		 49
50static efi_status_t
c116e8d6
MF		 51__file_size32(void *__fh, efi_char16_t *filename_16,
52 void **handle, u64 *file_sz)
53{
54 efi_file_handle_32_t *h, *fh = __fh;
55 efi_file_info_t *info;
56 efi_status_t status;
57 efi_guid_t info_guid = EFI_FILE_INFO_ID;
58 u32 info_sz;
59
60 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
61 EFI_FILE_MODE_READ, (u64)0);
62 if (status != EFI_SUCCESS) {
63 efi_printk(sys_table, "Failed to open file: ");
64 efi_char16_printk(sys_table, filename_16);
65 efi_printk(sys_table, "\n");
66 return status;
67 }
68
69 *handle = h;
70
71 info_sz = 0;
72 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
73 &info_sz, NULL);
74 if (status != EFI_BUFFER_TOO_SMALL) {
75 efi_printk(sys_table, "Failed to get file info size\n");
76 return status;
77 }
78
79grow:
204b0a1a
MF		 80 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
81 info_sz, (void **)&info);
c116e8d6
MF		 82 if (status != EFI_SUCCESS) {
83 efi_printk(sys_table, "Failed to alloc mem for file info\n");
84 return status;
85 }
86
87 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
88 &info_sz, info);
89 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a 90 efi_call_early(free_pool, info);
c116e8d6
MF		 91 goto grow;
92 }
93
94 *file_sz = info->file_size;
204b0a1a 95 efi_call_early(free_pool, info);
c116e8d6
MF		 96
97 if (status != EFI_SUCCESS)
98 efi_printk(sys_table, "Failed to get initrd info\n");
99
100 return status;
101}
102
103static efi_status_t
104__file_size64(void *__fh, efi_char16_t *filename_16,
105 void **handle, u64 *file_sz)
54b52d87 106{
c116e8d6 107 efi_file_handle_64_t *h, *fh = __fh;
54b52d87
MF		 108 efi_file_info_t *info;
109 efi_status_t status;
110 efi_guid_t info_guid = EFI_FILE_INFO_ID;
396f1a08 111 u64 info_sz;
54b52d87
MF		 112
113 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
114 EFI_FILE_MODE_READ, (u64)0);
115 if (status != EFI_SUCCESS) {
116 efi_printk(sys_table, "Failed to open file: ");
117 efi_char16_printk(sys_table, filename_16);
118 efi_printk(sys_table, "\n");
119 return status;
120 }
121
122 *handle = h;
123
124 info_sz = 0;
125 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
126 &info_sz, NULL);
127 if (status != EFI_BUFFER_TOO_SMALL) {
128 efi_printk(sys_table, "Failed to get file info size\n");
129 return status;
130 }
131
132grow:
204b0a1a
MF		 133 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
134 info_sz, (void **)&info);
54b52d87
MF		 135 if (status != EFI_SUCCESS) {
136 efi_printk(sys_table, "Failed to alloc mem for file info\n");
137 return status;
138 }
139
140 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
141 &info_sz, info);
142 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a 143 efi_call_early(free_pool, info);
54b52d87
MF		 144 goto grow;
145 }
146
147 *file_sz = info->file_size;
204b0a1a 148 efi_call_early(free_pool, info);
54b52d87
MF		 149
150 if (status != EFI_SUCCESS)
151 efi_printk(sys_table, "Failed to get initrd info\n");
152
153 return status;
154}
bd669475 155efi_status_t
c116e8d6
MF		 156efi_file_size(efi_system_table_t *sys_table, void *__fh,
157 efi_char16_t *filename_16, void **handle, u64 *file_sz)
158{
159 if (efi_early->is64)
160 return __file_size64(__fh, filename_16, handle, file_sz);
161
162 return __file_size32(__fh, filename_16, handle, file_sz);
163}
54b52d87 164
bd669475 165efi_status_t
47514c99 166efi_file_read(void *handle, unsigned long *size, void *addr)
54b52d87 167{
c116e8d6
MF		 168 unsigned long func;
169
170 if (efi_early->is64) {
47514c99 171 efi_file_handle_64_t *fh = handle;
c116e8d6
MF		 172
173 func = (unsigned long)fh->read;
174 return efi_early->call(func, handle, size, addr);
175 } else {
47514c99 176 efi_file_handle_32_t *fh = handle;
c116e8d6
MF		 177
178 func = (unsigned long)fh->read;
179 return efi_early->call(func, handle, size, addr);
180 }
54b52d87
MF		 181}
182
bd669475 183efi_status_t efi_file_close(void *handle)
54b52d87 184{
c116e8d6 185 if (efi_early->is64) {
47514c99 186 efi_file_handle_64_t *fh = handle;
c116e8d6
MF		 187
188 return efi_early->call((unsigned long)fh->close, handle);
189 } else {
47514c99 190 efi_file_handle_32_t *fh = handle;
c116e8d6
MF		 191
192 return efi_early->call((unsigned long)fh->close, handle);
193 }
194}
195
196static inline efi_status_t __open_volume32(void *__image, void **__fh)
197{
198 efi_file_io_interface_t *io;
199 efi_loaded_image_32_t *image = __image;
200 efi_file_handle_32_t *fh;
201 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
202 efi_status_t status;
203 void *handle = (void *)(unsigned long)image->device_handle;
204 unsigned long func;
205
204b0a1a
MF		 206 status = efi_call_early(handle_protocol, handle,
207 &fs_proto, (void **)&io);
c116e8d6
MF		 208 if (status != EFI_SUCCESS) {
209 efi_printk(sys_table, "Failed to handle fs_proto\n");
210 return status;
211 }
212
213 func = (unsigned long)io->open_volume;
214 status = efi_early->call(func, io, &fh);
215 if (status != EFI_SUCCESS)
216 efi_printk(sys_table, "Failed to open volume\n");
291f3632 217
c116e8d6
MF		 218 *__fh = fh;
219 return status;
54b52d87
MF		 220}
221
c116e8d6 222static inline efi_status_t __open_volume64(void *__image, void **__fh)
54b52d87
MF		 223{
224 efi_file_io_interface_t *io;
c116e8d6
MF		 225 efi_loaded_image_64_t *image = __image;
226 efi_file_handle_64_t *fh;
54b52d87
MF		 227 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
228 efi_status_t status;
229 void *handle = (void *)(unsigned long)image->device_handle;
c116e8d6 230 unsigned long func;
54b52d87 231
204b0a1a
MF		 232 status = efi_call_early(handle_protocol, handle,
233 &fs_proto, (void **)&io);
54b52d87
MF		 234 if (status != EFI_SUCCESS) {
235 efi_printk(sys_table, "Failed to handle fs_proto\n");
236 return status;
237 }
291f3632 238
54b52d87
MF		 239 func = (unsigned long)io->open_volume;
240 status = efi_early->call(func, io, &fh);
241 if (status != EFI_SUCCESS)
242 efi_printk(sys_table, "Failed to open volume\n");
243
244 *__fh = fh;
245 return status;
246}
247
bd669475 248efi_status_t
c116e8d6
MF		 249efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
250{
251 if (efi_early->is64)
252 return __open_volume64(__image, __fh);
253
254 return __open_volume32(__image, __fh);
255}
256
bd669475 257void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
54b52d87 258{
54b52d87
MF		 259 unsigned long output_string;
260 size_t offset;
54b52d87 261
c116e8d6
MF		 262 if (efi_early->is64) {
263 struct efi_simple_text_output_protocol_64 *out;
264 u64 *func;
54b52d87 265
c116e8d6
MF		 266 offset = offsetof(typeof(*out), output_string);
267 output_string = efi_early->text_output + offset;
268 func = (u64 *)output_string;
269
270 efi_early->call(*func, efi_early->text_output, str);
271 } else {
272 struct efi_simple_text_output_protocol_32 *out;
273 u32 *func;
274
275 offset = offsetof(typeof(*out), output_string);
276 output_string = efi_early->text_output + offset;
277 func = (u32 *)output_string;
278
279 efi_early->call(*func, efi_early->text_output, str);
280 }
54b52d87
MF		 281}
282
291f3632
MF		 283static void find_bits(unsigned long mask, u8 *pos, u8 *size)
284{
285 u8 first, len;
286
287 first = 0;
288 len = 0;
289
290 if (mask) {
291 while (!(mask & 0x1)) {
292 mask = mask >> 1;
293 first++;
294 }
295
296 while (mask & 0x1) {
297 mask = mask >> 1;
298 len++;
299 }
300 }
301
302 *pos = first;
303 *size = len;
304}
305
c116e8d6
MF		 306static efi_status_t
307__setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
dd5fc854 308{
c116e8d6 309 struct pci_setup_rom *rom = NULL;
dd5fc854 310 efi_status_t status;
c116e8d6
MF		 311 unsigned long size;
312 uint64_t attributes;
dd5fc854 313
c116e8d6
MF		 314 status = efi_early->call(pci->attributes, pci,
315 EfiPciIoAttributeOperationGet, 0, 0,
316 &attributes);
317 if (status != EFI_SUCCESS)
318 return status;
dd5fc854 319
c116e8d6
MF		 320 if (!pci->romimage || !pci->romsize)
321 return EFI_INVALID_PARAMETER;
dd5fc854 322
c116e8d6 323 size = pci->romsize + sizeof(*rom);
dd5fc854 324
204b0a1a 325 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
c116e8d6
MF		 326 if (status != EFI_SUCCESS)
327 return status;
dd5fc854 328
c116e8d6
MF		 329 memset(rom, 0, sizeof(*rom));
330
331 rom->data.type = SETUP_PCI;
332 rom->data.len = size - sizeof(struct setup_data);
333 rom->data.next = 0;
334 rom->pcilen = pci->romsize;
335 *__rom = rom;
336
337 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
338 PCI_VENDOR_ID, 1, &(rom->vendor));
dd5fc854
MG		 339
340 if (status != EFI_SUCCESS)
c116e8d6
MF		 341 goto free_struct;
342
343 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
344 PCI_DEVICE_ID, 1, &(rom->devid));
345
346 if (status != EFI_SUCCESS)
347 goto free_struct;
348
349 status = efi_early->call(pci->get_location, pci, &(rom->segment),
350 &(rom->bus), &(rom->device), &(rom->function));
351
352 if (status != EFI_SUCCESS)
353 goto free_struct;
354
355 memcpy(rom->romdata, pci->romimage, pci->romsize);
356 return status;
357
358free_struct:
204b0a1a 359 efi_call_early(free_pool, rom);
c116e8d6
MF		 360 return status;
361}
362
363static efi_status_t
364setup_efi_pci32(struct boot_params *params, void **pci_handle,
365 unsigned long size)
366{
367 efi_pci_io_protocol_32 *pci = NULL;
368 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
369 u32 *handles = (u32 *)(unsigned long)pci_handle;
370 efi_status_t status;
371 unsigned long nr_pci;
372 struct setup_data *data;
373 int i;
374
375 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
376
377 while (data && data->next)
378 data = (struct setup_data *)(unsigned long)data->next;
dd5fc854 379
c116e8d6 380 nr_pci = size / sizeof(u32);
dd5fc854 381 for (i = 0; i < nr_pci; i++) {
c116e8d6
MF		 382 struct pci_setup_rom *rom = NULL;
383 u32 h = handles[i];
dd5fc854 384
204b0a1a
MF		 385 status = efi_call_early(handle_protocol, h,
386 &pci_proto, (void **)&pci);
dd5fc854
MG		 387
388 if (status != EFI_SUCCESS)
389 continue;
390
391 if (!pci)
392 continue;
393
c116e8d6 394 status = __setup_efi_pci32(pci, &rom);
dd5fc854
MG		 395 if (status != EFI_SUCCESS)
396 continue;
397
c116e8d6
MF		 398 if (data)
399 data->next = (unsigned long)rom;
400 else
401 params->hdr.setup_data = (unsigned long)rom;
402
403 data = (struct setup_data *)rom;
dd5fc854 404
c116e8d6 405 }
dd5fc854 406
c116e8d6
MF		 407 return status;
408}
dd5fc854 409
c116e8d6
MF		 410static efi_status_t
411__setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
412{
413 struct pci_setup_rom *rom;
414 efi_status_t status;
415 unsigned long size;
416 uint64_t attributes;
dd5fc854 417
c116e8d6
MF		 418 status = efi_early->call(pci->attributes, pci,
419 EfiPciIoAttributeOperationGet, 0,
420 &attributes);
421 if (status != EFI_SUCCESS)
422 return status;
dd5fc854 423
c116e8d6
MF		 424 if (!pci->romimage || !pci->romsize)
425 return EFI_INVALID_PARAMETER;
dd5fc854 426
c116e8d6 427 size = pci->romsize + sizeof(*rom);
dd5fc854 428
204b0a1a 429 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
c116e8d6
MF		 430 if (status != EFI_SUCCESS)
431 return status;
432
433 rom->data.type = SETUP_PCI;
434 rom->data.len = size - sizeof(struct setup_data);
435 rom->data.next = 0;
436 rom->pcilen = pci->romsize;
437 *__rom = rom;
438
439 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
440 PCI_VENDOR_ID, 1, &(rom->vendor));
441
442 if (status != EFI_SUCCESS)
443 goto free_struct;
444
445 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
446 PCI_DEVICE_ID, 1, &(rom->devid));
447
448 if (status != EFI_SUCCESS)
449 goto free_struct;
450
451 status = efi_early->call(pci->get_location, pci, &(rom->segment),
452 &(rom->bus), &(rom->device), &(rom->function));
453
454 if (status != EFI_SUCCESS)
455 goto free_struct;
456
457 memcpy(rom->romdata, pci->romimage, pci->romsize);
458 return status;
459
460free_struct:
204b0a1a 461 efi_call_early(free_pool, rom);
c116e8d6
MF		 462 return status;
463
464}
465
466static efi_status_t
467setup_efi_pci64(struct boot_params *params, void **pci_handle,
468 unsigned long size)
469{
470 efi_pci_io_protocol_64 *pci = NULL;
471 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
472 u64 *handles = (u64 *)(unsigned long)pci_handle;
473 efi_status_t status;
474 unsigned long nr_pci;
475 struct setup_data *data;
476 int i;
dd5fc854 477
c116e8d6
MF		 478 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
479
480 while (data && data->next)
481 data = (struct setup_data *)(unsigned long)data->next;
482
483 nr_pci = size / sizeof(u64);
484 for (i = 0; i < nr_pci; i++) {
485 struct pci_setup_rom *rom = NULL;
486 u64 h = handles[i];
487
204b0a1a
MF		 488 status = efi_call_early(handle_protocol, h,
489 &pci_proto, (void **)&pci);
dd5fc854
MG		 490
491 if (status != EFI_SUCCESS)
c116e8d6
MF		 492 continue;
493
494 if (!pci)
495 continue;
dd5fc854 496
c116e8d6
MF		 497 status = __setup_efi_pci64(pci, &rom);
498 if (status != EFI_SUCCESS)
499 continue;
dd5fc854
MG		 500
501 if (data)
bc754790 502 data->next = (unsigned long)rom;
dd5fc854 503 else
bc754790 504 params->hdr.setup_data = (unsigned long)rom;
dd5fc854
MG		 505
506 data = (struct setup_data *)rom;
507
dd5fc854
MG		 508 }
509
dd5fc854
MG		 510 return status;
511}
512
c116e8d6 513static efi_status_t setup_efi_pci(struct boot_params *params)
291f3632 514{
291f3632 515 efi_status_t status;
c116e8d6
MF		 516 void **pci_handle = NULL;
517 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
518 unsigned long size = 0;
291f3632 519
204b0a1a
MF		 520 status = efi_call_early(locate_handle,
521 EFI_LOCATE_BY_PROTOCOL,
522 &pci_proto, NULL, &size, pci_handle);
291f3632 523
c116e8d6 524 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a
MF		 525 status = efi_call_early(allocate_pool,
526 EFI_LOADER_DATA,
527 size, (void **)&pci_handle);
291f3632 528
291f3632 529 if (status != EFI_SUCCESS)
c116e8d6 530 return status;
291f3632 531
204b0a1a
MF		 532 status = efi_call_early(locate_handle,
533 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
534 NULL, &size, pci_handle);
291f3632
MF		 535 }
536
c116e8d6 537 if (status != EFI_SUCCESS)
291f3632
MF		 538 goto free_handle;
539
c116e8d6
MF		 540 if (efi_early->is64)
541 status = setup_efi_pci64(params, pci_handle, size);
542 else
543 status = setup_efi_pci32(params, pci_handle, size);
291f3632 544
c116e8d6 545free_handle:
204b0a1a 546 efi_call_early(free_pool, pci_handle);
c116e8d6
MF		 547 return status;
548}
291f3632 549
c116e8d6
MF		 550static void
551setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
552 struct efi_pixel_bitmask pixel_info, int pixel_format)
553{
291f3632
MF		 554 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
555 si->lfb_depth = 32;
556 si->lfb_linelength = pixels_per_scan_line * 4;
557 si->red_size = 8;
558 si->red_pos = 0;
559 si->green_size = 8;
560 si->green_pos = 8;
561 si->blue_size = 8;
562 si->blue_pos = 16;
563 si->rsvd_size = 8;
564 si->rsvd_pos = 24;
565 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
566 si->lfb_depth = 32;
567 si->lfb_linelength = pixels_per_scan_line * 4;
568 si->red_size = 8;
569 si->red_pos = 16;
570 si->green_size = 8;
571 si->green_pos = 8;
572 si->blue_size = 8;
573 si->blue_pos = 0;
574 si->rsvd_size = 8;
575 si->rsvd_pos = 24;
576 } else if (pixel_format == PIXEL_BIT_MASK) {
577 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
578 find_bits(pixel_info.green_mask, &si->green_pos,
579 &si->green_size);
580 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
581 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
582 &si->rsvd_size);
583 si->lfb_depth = si->red_size + si->green_size +
584 si->blue_size + si->rsvd_size;
585 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
586 } else {
587 si->lfb_depth = 4;
588 si->lfb_linelength = si->lfb_width / 2;
589 si->red_size = 0;
590 si->red_pos = 0;
591 si->green_size = 0;
592 si->green_pos = 0;
593 si->blue_size = 0;
594 si->blue_pos = 0;
595 si->rsvd_size = 0;
596 si->rsvd_pos = 0;
597 }
c116e8d6
MF		 598}
599
600static efi_status_t
601__gop_query32(struct efi_graphics_output_protocol_32 *gop32,
602 struct efi_graphics_output_mode_info **info,
603 unsigned long *size, u32 *fb_base)
604{
605 struct efi_graphics_output_protocol_mode_32 *mode;
606 efi_status_t status;
607 unsigned long m;
608
609 m = gop32->mode;
610 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
611
612 status = efi_early->call(gop32->query_mode, gop32,
613 mode->mode, size, info);
614 if (status != EFI_SUCCESS)
615 return status;
616
617 *fb_base = mode->frame_buffer_base;
618 return status;
619}
620
621static efi_status_t
622setup_gop32(struct screen_info *si, efi_guid_t *proto,
623 unsigned long size, void **gop_handle)
624{
625 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
626 unsigned long nr_gops;
627 u16 width, height;
628 u32 pixels_per_scan_line;
629 u32 fb_base;
630 struct efi_pixel_bitmask pixel_info;
631 int pixel_format;
632 efi_status_t status;
633 u32 *handles = (u32 *)(unsigned long)gop_handle;
634 int i;
635
636 first_gop = NULL;
637 gop32 = NULL;
638
639 nr_gops = size / sizeof(u32);
640 for (i = 0; i < nr_gops; i++) {
641 struct efi_graphics_output_mode_info *info = NULL;
642 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
643 bool conout_found = false;
644 void *dummy = NULL;
645 u32 h = handles[i];
646
204b0a1a
MF		 647 status = efi_call_early(handle_protocol, h,
648 proto, (void **)&gop32);
c116e8d6
MF		 649 if (status != EFI_SUCCESS)
650 continue;
651
204b0a1a
MF		 652 status = efi_call_early(handle_protocol, h,
653 &conout_proto, &dummy);
c116e8d6
MF		 654 if (status == EFI_SUCCESS)
655 conout_found = true;
656
657 status = __gop_query32(gop32, &info, &size, &fb_base);
658 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
659 /*
660 * Systems that use the UEFI Console Splitter may
661 * provide multiple GOP devices, not all of which are
662 * backed by real hardware. The workaround is to search
663 * for a GOP implementing the ConOut protocol, and if
664 * one isn't found, to just fall back to the first GOP.
665 */
666 width = info->horizontal_resolution;
667 height = info->vertical_resolution;
668 pixel_format = info->pixel_format;
669 pixel_info = info->pixel_information;
670 pixels_per_scan_line = info->pixels_per_scan_line;
671
672 /*
673 * Once we've found a GOP supporting ConOut,
674 * don't bother looking any further.
675 */
676 first_gop = gop32;
677 if (conout_found)
678 break;
679 }
680 }
681
682 /* Did we find any GOPs? */
683 if (!first_gop)
684 goto out;
685
686 /* EFI framebuffer */
687 si->orig_video_isVGA = VIDEO_TYPE_EFI;
688
689 si->lfb_width = width;
690 si->lfb_height = height;
691 si->lfb_base = fb_base;
692 si->pages = 1;
693
694 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
291f3632 695
e9b10953
MG		 696 si->lfb_size = si->lfb_linelength * si->lfb_height;
697
f462ed93 698 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
c116e8d6
MF		 699out:
700 return status;
701}
f462ed93 702
c116e8d6
MF		 703static efi_status_t
704__gop_query64(struct efi_graphics_output_protocol_64 *gop64,
705 struct efi_graphics_output_mode_info **info,
706 unsigned long *size, u32 *fb_base)
707{
708 struct efi_graphics_output_protocol_mode_64 *mode;
709 efi_status_t status;
710 unsigned long m;
711
712 m = gop64->mode;
713 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
714
715 status = efi_early->call(gop64->query_mode, gop64,
716 mode->mode, size, info);
717 if (status != EFI_SUCCESS)
718 return status;
719
720 *fb_base = mode->frame_buffer_base;
721 return status;
722}
723
724static efi_status_t
725setup_gop64(struct screen_info *si, efi_guid_t *proto,
726 unsigned long size, void **gop_handle)
727{
728 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
729 unsigned long nr_gops;
730 u16 width, height;
731 u32 pixels_per_scan_line;
732 u32 fb_base;
733 struct efi_pixel_bitmask pixel_info;
734 int pixel_format;
735 efi_status_t status;
736 u64 *handles = (u64 *)(unsigned long)gop_handle;
737 int i;
738
739 first_gop = NULL;
740 gop64 = NULL;
741
742 nr_gops = size / sizeof(u64);
743 for (i = 0; i < nr_gops; i++) {
744 struct efi_graphics_output_mode_info *info = NULL;
745 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
746 bool conout_found = false;
747 void *dummy = NULL;
748 u64 h = handles[i];
749
204b0a1a
MF		 750 status = efi_call_early(handle_protocol, h,
751 proto, (void **)&gop64);
c116e8d6
MF		 752 if (status != EFI_SUCCESS)
753 continue;
754
204b0a1a
MF		 755 status = efi_call_early(handle_protocol, h,
756 &conout_proto, &dummy);
c116e8d6
MF		 757 if (status == EFI_SUCCESS)
758 conout_found = true;
759
760 status = __gop_query64(gop64, &info, &size, &fb_base);
761 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
762 /*
763 * Systems that use the UEFI Console Splitter may
764 * provide multiple GOP devices, not all of which are
765 * backed by real hardware. The workaround is to search
766 * for a GOP implementing the ConOut protocol, and if
767 * one isn't found, to just fall back to the first GOP.
768 */
769 width = info->horizontal_resolution;
770 height = info->vertical_resolution;
771 pixel_format = info->pixel_format;
772 pixel_info = info->pixel_information;
773 pixels_per_scan_line = info->pixels_per_scan_line;
774
775 /*
776 * Once we've found a GOP supporting ConOut,
777 * don't bother looking any further.
778 */
779 first_gop = gop64;
780 if (conout_found)
781 break;
782 }
783 }
784
785 /* Did we find any GOPs? */
786 if (!first_gop)
787 goto out;
788
789 /* EFI framebuffer */
790 si->orig_video_isVGA = VIDEO_TYPE_EFI;
791
792 si->lfb_width = width;
793 si->lfb_height = height;
794 si->lfb_base = fb_base;
795 si->pages = 1;
796
797 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
798
799 si->lfb_size = si->lfb_linelength * si->lfb_height;
800
801 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
802out:
291f3632
MF		 803 return status;
804}
805
806/*
c116e8d6 807 * See if we have Graphics Output Protocol
291f3632 808 */
c116e8d6 809static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
291f3632
MF		 810 unsigned long size)
811{
291f3632 812 efi_status_t status;
c116e8d6 813 void **gop_handle = NULL;
291f3632 814
204b0a1a
MF		 815 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
816 size, (void **)&gop_handle);
291f3632
MF		 817 if (status != EFI_SUCCESS)
818 return status;
819
204b0a1a
MF		 820 status = efi_call_early(locate_handle,
821 EFI_LOCATE_BY_PROTOCOL,
822 proto, NULL, &size, gop_handle);
291f3632
MF		 823 if (status != EFI_SUCCESS)
824 goto free_handle;
825
c116e8d6
MF		 826 if (efi_early->is64)
827 status = setup_gop64(si, proto, size, gop_handle);
828 else
829 status = setup_gop32(si, proto, size, gop_handle);
830
831free_handle:
204b0a1a 832 efi_call_early(free_pool, gop_handle);
c116e8d6
MF		 833 return status;
834}
835
836static efi_status_t
837setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
838{
839 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
840 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
841 unsigned long nr_ugas;
842 u32 *handles = (u32 *)uga_handle;;
843 efi_status_t status;
844 int i;
845
291f3632 846 first_uga = NULL;
c116e8d6
MF		 847 nr_ugas = size / sizeof(u32);
848 for (i = 0; i < nr_ugas; i++) {
849 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
850 u32 w, h, depth, refresh;
851 void *pciio;
852 u32 handle = handles[i];
853
204b0a1a
MF		 854 status = efi_call_early(handle_protocol, handle,
855 &uga_proto, (void **)&uga);
c116e8d6
MF		 856 if (status != EFI_SUCCESS)
857 continue;
858
204b0a1a 859 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
c116e8d6
MF		 860
861 status = efi_early->call((unsigned long)uga->get_mode, uga,
862 &w, &h, &depth, &refresh);
863 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
864 *width = w;
865 *height = h;
866
867 /*
868 * Once we've found a UGA supporting PCIIO,
869 * don't bother looking any further.
870 */
871 if (pciio)
872 break;
873
874 first_uga = uga;
875 }
876 }
877
878 return status;
879}
291f3632 880
c116e8d6
MF		 881static efi_status_t
882setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
883{
884 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
885 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
886 unsigned long nr_ugas;
887 u64 *handles = (u64 *)uga_handle;;
888 efi_status_t status;
889 int i;
890
891 first_uga = NULL;
892 nr_ugas = size / sizeof(u64);
291f3632
MF		 893 for (i = 0; i < nr_ugas; i++) {
894 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
291f3632
MF		 895 u32 w, h, depth, refresh;
896 void *pciio;
c116e8d6 897 u64 handle = handles[i];
291f3632 898
204b0a1a
MF		 899 status = efi_call_early(handle_protocol, handle,
900 &uga_proto, (void **)&uga);
291f3632
MF		 901 if (status != EFI_SUCCESS)
902 continue;
903
204b0a1a 904 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
291f3632 905
54b52d87
MF		 906 status = efi_early->call((unsigned long)uga->get_mode, uga,
907 &w, &h, &depth, &refresh);
291f3632 908 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
c116e8d6
MF		 909 *width = w;
910 *height = h;
291f3632
MF		 911
912 /*
913 * Once we've found a UGA supporting PCIIO,
914 * don't bother looking any further.
915 */
916 if (pciio)
917 break;
918
919 first_uga = uga;
920 }
921 }
922
c116e8d6
MF		 923 return status;
924}
925
926/*
927 * See if we have Universal Graphics Adapter (UGA) protocol
928 */
929static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
930 unsigned long size)
931{
932 efi_status_t status;
933 u32 width, height;
934 void **uga_handle = NULL;
935
204b0a1a
MF		 936 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
937 size, (void **)&uga_handle);
c116e8d6
MF		 938 if (status != EFI_SUCCESS)
939 return status;
940
204b0a1a
MF		 941 status = efi_call_early(locate_handle,
942 EFI_LOCATE_BY_PROTOCOL,
943 uga_proto, NULL, &size, uga_handle);
c116e8d6
MF		 944 if (status != EFI_SUCCESS)
945 goto free_handle;
946
947 height = 0;
948 width = 0;
949
950 if (efi_early->is64)
951 status = setup_uga64(uga_handle, size, &width, &height);
952 else
953 status = setup_uga32(uga_handle, size, &width, &height);
954
955 if (!width && !height)
291f3632
MF		 956 goto free_handle;
957
958 /* EFI framebuffer */
959 si->orig_video_isVGA = VIDEO_TYPE_EFI;
960
961 si->lfb_depth = 32;
962 si->lfb_width = width;
963 si->lfb_height = height;
964
965 si->red_size = 8;
966 si->red_pos = 16;
967 si->green_size = 8;
968 si->green_pos = 8;
969 si->blue_size = 8;
970 si->blue_pos = 0;
971 si->rsvd_size = 8;
972 si->rsvd_pos = 24;
973
291f3632 974free_handle:
204b0a1a 975 efi_call_early(free_pool, uga_handle);
291f3632
MF		 976 return status;
977}
978
979void setup_graphics(struct boot_params *boot_params)
980{
981 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
982 struct screen_info *si;
983 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
984 efi_status_t status;
985 unsigned long size;
986 void **gop_handle = NULL;
987 void **uga_handle = NULL;
988
989 si = &boot_params->screen_info;
990 memset(si, 0, sizeof(*si));
991
992 size = 0;
204b0a1a
MF		 993 status = efi_call_early(locate_handle,
994 EFI_LOCATE_BY_PROTOCOL,
995 &graphics_proto, NULL, &size, gop_handle);
291f3632
MF		 996 if (status == EFI_BUFFER_TOO_SMALL)
997 status = setup_gop(si, &graphics_proto, size);
998
999 if (status != EFI_SUCCESS) {
1000 size = 0;
204b0a1a
MF		 1001 status = efi_call_early(locate_handle,
1002 EFI_LOCATE_BY_PROTOCOL,
1003 &uga_proto, NULL, &size, uga_handle);
291f3632
MF		 1004 if (status == EFI_BUFFER_TOO_SMALL)
1005 setup_uga(si, &uga_proto, size);
1006 }
1007}
1008
291f3632
MF		 1009/*
1010 * Because the x86 boot code expects to be passed a boot_params we
1011 * need to create one ourselves (usually the bootloader would create
1012 * one for us).
7e8213c1
MF		 1013 *
1014 * The caller is responsible for filling out ->code32_start in the
1015 * returned boot_params.
291f3632 1016 */
54b52d87 1017struct boot_params *make_boot_params(struct efi_config *c)
291f3632 1018{
9ca8f72a
MF		 1019 struct boot_params *boot_params;
1020 struct sys_desc_table *sdt;
1021 struct apm_bios_info *bi;
1022 struct setup_header *hdr;
1023 struct efi_info *efi;
1024 efi_loaded_image_t *image;
54b52d87 1025 void *options, *handle;
9ca8f72a 1026 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
291f3632
MF		 1027 int options_size = 0;
1028 efi_status_t status;
5fef3870 1029 char *cmdline_ptr;
291f3632
MF		 1030 u16 *s2;
1031 u8 *s1;
1032 int i;
46f4582e
RF		 1033 unsigned long ramdisk_addr;
1034 unsigned long ramdisk_size;
4bf7111f 1035 unsigned long initrd_addr_max;
291f3632 1036
54b52d87
MF		 1037 efi_early = c;
1038 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1039 handle = (void *)(unsigned long)efi_early->image_handle;
9ca8f72a
MF		 1040
1041 /* Check if we were booted by the EFI firmware */
1042 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1043 return NULL;
1044
54b52d87
MF		 1045 if (efi_early->is64)
1046 setup_boot_services64(efi_early);
1047 else
1048 setup_boot_services32(efi_early);
1049
204b0a1a
MF		 1050 status = efi_call_early(handle_protocol, handle,
1051 &proto, (void *)&image);
9ca8f72a 1052 if (status != EFI_SUCCESS) {
876dc36a 1053 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
9ca8f72a
MF		 1054 return NULL;
1055 }
1056
40e4530a
RF		 1057 status = efi_low_alloc(sys_table, 0x4000, 1,
1058 (unsigned long *)&boot_params);
9ca8f72a 1059 if (status != EFI_SUCCESS) {
876dc36a 1060 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
9ca8f72a
MF		 1061 return NULL;
1062 }
1063
1064 memset(boot_params, 0x0, 0x4000);
1065
1066 hdr = &boot_params->hdr;
1067 efi = &boot_params->efi_info;
1068 bi = &boot_params->apm_bios_info;
1069 sdt = &boot_params->sys_desc_table;
1070
1071 /* Copy the second sector to boot_params */
1072 memcpy(&hdr->jump, image->image_base + 512, 512);
1073
1074 /*
1075 * Fill out some of the header fields ourselves because the
1076 * EFI firmware loader doesn't load the first sector.
1077 */
1078 hdr->root_flags = 1;
1079 hdr->vid_mode = 0xffff;
1080 hdr->boot_flag = 0xAA55;
1081
291f3632
MF		 1082 hdr->type_of_loader = 0x21;
1083
1084 /* Convert unicode cmdline to ascii */
c625d1c2 1085 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
5fef3870
RF		 1086 if (!cmdline_ptr)
1087 goto fail;
1088 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
291f3632
MF		 1089
1090 hdr->ramdisk_image = 0;
1091 hdr->ramdisk_size = 0;
1092
291f3632
MF		 1093 /* Clear APM BIOS info */
1094 memset(bi, 0, sizeof(*bi));
1095
1096 memset(sdt, 0, sizeof(*sdt));
1097
4bf7111f
YL		 1098 if (hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)
1099 initrd_addr_max = -1UL;
1100 else
1101 initrd_addr_max = hdr->initrd_addr_max;
1102
5a17dae4
MF		 1103 status = efi_parse_options(cmdline_ptr);
1104 if (status != EFI_SUCCESS)
1105 goto fail2;
1106
46f4582e
RF		 1107 status = handle_cmdline_files(sys_table, image,
1108 (char *)(unsigned long)hdr->cmd_line_ptr,
4bf7111f 1109 "initrd=", initrd_addr_max,
46f4582e 1110 &ramdisk_addr, &ramdisk_size);
9ca8f72a
MF		 1111 if (status != EFI_SUCCESS)
1112 goto fail2;
4bf7111f
YL		 1113 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
1114 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
1115 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
1116 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
9ca8f72a
MF		 1117
1118 return boot_params;
1119fail2:
0e1cadb0 1120 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
9ca8f72a 1121fail:
40e4530a 1122 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
9ca8f72a
MF		 1123 return NULL;
1124}
1125
d2078d5a
LC		 1126static void add_e820ext(struct boot_params *params,
1127 struct setup_data *e820ext, u32 nr_entries)
9ca8f72a 1128{
d2078d5a 1129 struct setup_data *data;
9ca8f72a 1130 efi_status_t status;
d2078d5a 1131 unsigned long size;
291f3632 1132
d2078d5a
LC		 1133 e820ext->type = SETUP_E820_EXT;
1134 e820ext->len = nr_entries * sizeof(struct e820entry);
1135 e820ext->next = 0;
291f3632 1136
d2078d5a 1137 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
291f3632 1138
d2078d5a
LC		 1139 while (data && data->next)
1140 data = (struct setup_data *)(unsigned long)data->next;
d3768d88 1141
d2078d5a
LC		 1142 if (data)
1143 data->next = (unsigned long)e820ext;
1144 else
1145 params->hdr.setup_data = (unsigned long)e820ext;
1146}
291f3632 1147
d2078d5a
LC		 1148static efi_status_t setup_e820(struct boot_params *params,
1149 struct setup_data *e820ext, u32 e820ext_size)
1150{
1151 struct e820entry *e820_map = &params->e820_map[0];
1152 struct efi_info *efi = &params->efi_info;
1153 struct e820entry *prev = NULL;
1154 u32 nr_entries;
1155 u32 nr_desc;
1156 int i;
291f3632 1157
291f3632 1158 nr_entries = 0;
d2078d5a
LC		 1159 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1160
1161 for (i = 0; i < nr_desc; i++) {
291f3632
MF		 1162 efi_memory_desc_t *d;
1163 unsigned int e820_type = 0;
d2078d5a 1164 unsigned long m = efi->efi_memmap;
291f3632 1165
d2078d5a 1166 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
291f3632
MF		 1167 switch (d->type) {
1168 case EFI_RESERVED_TYPE:
1169 case EFI_RUNTIME_SERVICES_CODE:
1170 case EFI_RUNTIME_SERVICES_DATA:
1171 case EFI_MEMORY_MAPPED_IO:
1172 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1173 case EFI_PAL_CODE:
1174 e820_type = E820_RESERVED;
1175 break;
1176
1177 case EFI_UNUSABLE_MEMORY:
1178 e820_type = E820_UNUSABLE;
1179 break;
1180
1181 case EFI_ACPI_RECLAIM_MEMORY:
1182 e820_type = E820_ACPI;
1183 break;
1184
1185 case EFI_LOADER_CODE:
1186 case EFI_LOADER_DATA:
1187 case EFI_BOOT_SERVICES_CODE:
1188 case EFI_BOOT_SERVICES_DATA:
1189 case EFI_CONVENTIONAL_MEMORY:
1190 e820_type = E820_RAM;
1191 break;
1192
1193 case EFI_ACPI_MEMORY_NVS:
1194 e820_type = E820_NVS;
1195 break;
1196
1197 default:
1198 continue;
1199 }
1200
1201 /* Merge adjacent mappings */
1202 if (prev && prev->type == e820_type &&
d2078d5a 1203 (prev->addr + prev->size) == d->phys_addr) {
291f3632 1204 prev->size += d->num_pages << 12;
d2078d5a 1205 continue;
291f3632 1206 }
d2078d5a
LC		 1207
1208 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1209 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1210 sizeof(struct setup_data);
1211
1212 if (!e820ext || e820ext_size < need)
1213 return EFI_BUFFER_TOO_SMALL;
1214
1215 /* boot_params map full, switch to e820 extended */
1216 e820_map = (struct e820entry *)e820ext->data;
1217 }
1218
1219 e820_map->addr = d->phys_addr;
1220 e820_map->size = d->num_pages << PAGE_SHIFT;
1221 e820_map->type = e820_type;
1222 prev = e820_map++;
1223 nr_entries++;
291f3632
MF		 1224 }
1225
d2078d5a
LC		 1226 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1227 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1228
1229 add_e820ext(params, e820ext, nr_e820ext);
1230 nr_entries -= nr_e820ext;
1231 }
1232
1233 params->e820_entries = (u8)nr_entries;
1234
1235 return EFI_SUCCESS;
1236}
1237
1238static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1239 u32 *e820ext_size)
1240{
1241 efi_status_t status;
1242 unsigned long size;
1243
1244 size = sizeof(struct setup_data) +
1245 sizeof(struct e820entry) * nr_desc;
1246
1247 if (*e820ext) {
204b0a1a 1248 efi_call_early(free_pool, *e820ext);
d2078d5a
LC		 1249 *e820ext = NULL;
1250 *e820ext_size = 0;
1251 }
1252
204b0a1a
MF		 1253 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1254 size, (void **)e820ext);
d2078d5a
LC		 1255 if (status == EFI_SUCCESS)
1256 *e820ext_size = size;
1257
1258 return status;
1259}
1260
1261static efi_status_t exit_boot(struct boot_params *boot_params,
b8ff87a6 1262 void *handle, bool is64)
d2078d5a
LC		 1263{
1264 struct efi_info *efi = &boot_params->efi_info;
1265 unsigned long map_sz, key, desc_size;
1266 efi_memory_desc_t *mem_map;
1267 struct setup_data *e820ext;
b8ff87a6 1268 const char *signature;
d2078d5a
LC		 1269 __u32 e820ext_size;
1270 __u32 nr_desc, prev_nr_desc;
1271 efi_status_t status;
1272 __u32 desc_version;
1273 bool called_exit = false;
1274 u8 nr_entries;
1275 int i;
1276
1277 nr_desc = 0;
1278 e820ext = NULL;
1279 e820ext_size = 0;
1280
1281get_map:
1282 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1283 &desc_version, &key);
1284
1285 if (status != EFI_SUCCESS)
1286 return status;
1287
1288 prev_nr_desc = nr_desc;
1289 nr_desc = map_sz / desc_size;
1290 if (nr_desc > prev_nr_desc &&
1291 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1292 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1293
1294 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1295 if (status != EFI_SUCCESS)
1296 goto free_mem_map;
1297
204b0a1a 1298 efi_call_early(free_pool, mem_map);
d2078d5a
LC		 1299 goto get_map; /* Allocated memory, get map again */
1300 }
1301
b8ff87a6
MF		 1302 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1303 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1304
d2078d5a
LC		 1305 efi->efi_systab = (unsigned long)sys_table;
1306 efi->efi_memdesc_size = desc_size;
1307 efi->efi_memdesc_version = desc_version;
1308 efi->efi_memmap = (unsigned long)mem_map;
1309 efi->efi_memmap_size = map_sz;
1310
1311#ifdef CONFIG_X86_64
1312 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1313 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1314#endif
1315
1316 /* Might as well exit boot services now */
204b0a1a 1317 status = efi_call_early(exit_boot_services, handle, key);
d2078d5a
LC		 1318 if (status != EFI_SUCCESS) {
1319 /*
1320 * ExitBootServices() will fail if any of the event
1321 * handlers change the memory map. In which case, we
1322 * must be prepared to retry, but only once so that
1323 * we're guaranteed to exit on repeated failures instead
1324 * of spinning forever.
1325 */
1326 if (called_exit)
1327 goto free_mem_map;
1328
1329 called_exit = true;
204b0a1a 1330 efi_call_early(free_pool, mem_map);
d2078d5a
LC		 1331 goto get_map;
1332 }
1333
1334 /* Historic? */
1335 boot_params->alt_mem_k = 32 * 1024;
1336
1337 status = setup_e820(boot_params, e820ext, e820ext_size);
1338 if (status != EFI_SUCCESS)
1339 return status;
291f3632
MF		 1340
1341 return EFI_SUCCESS;
1342
1343free_mem_map:
204b0a1a 1344 efi_call_early(free_pool, mem_map);
291f3632
MF		 1345 return status;
1346}
1347
9ca8f72a
MF		 1348/*
1349 * On success we return a pointer to a boot_params structure, and NULL
1350 * on failure.
1351 */
54b52d87 1352struct boot_params *efi_main(struct efi_config *c,
9ca8f72a
MF		 1353 struct boot_params *boot_params)
1354{
54b52d87 1355 struct desc_ptr *gdt = NULL;
9ca8f72a
MF		 1356 efi_loaded_image_t *image;
1357 struct setup_header *hdr = &boot_params->hdr;
1358 efi_status_t status;
1359 struct desc_struct *desc;
54b52d87
MF		 1360 void *handle;
1361 efi_system_table_t *_table;
1362 bool is64;
1363
1364 efi_early = c;
1365
1366 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1367 handle = (void *)(unsigned long)efi_early->image_handle;
1368 is64 = efi_early->is64;
9ca8f72a
MF		 1369
1370 sys_table = _table;
1371
1372 /* Check if we were booted by the EFI firmware */
1373 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1374 goto fail;
1375
54b52d87
MF		 1376 if (is64)
1377 setup_boot_services64(efi_early);
1378 else
1379 setup_boot_services32(efi_early);
1380
9ca8f72a 1381 setup_graphics(boot_params);
291f3632 1382
fb86b244
UW		 1383 status = setup_efi_pci(boot_params);
1384 if (status != EFI_SUCCESS) {
1385 efi_printk(sys_table, "setup_efi_pci() failed!\n");
1386 }
dd5fc854 1387
204b0a1a
MF		 1388 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1389 sizeof(*gdt), (void **)&gdt);
9fa7deda 1390 if (status != EFI_SUCCESS) {
876dc36a 1391 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
291f3632 1392 goto fail;
9fa7deda 1393 }
291f3632
MF		 1394
1395 gdt->size = 0x800;
40e4530a 1396 status = efi_low_alloc(sys_table, gdt->size, 8,
876dc36a 1397 (unsigned long *)&gdt->address);
9fa7deda 1398 if (status != EFI_SUCCESS) {
876dc36a 1399 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
291f3632 1400 goto fail;
9fa7deda 1401 }
291f3632 1402
9ca8f72a
MF		 1403 /*
1404 * If the kernel isn't already loaded at the preferred load
1405 * address, relocate it.
1406 */
1407 if (hdr->pref_address != hdr->code32_start) {
4a9f3a7c
RF		 1408 unsigned long bzimage_addr = hdr->code32_start;
1409 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1410 hdr->init_size, hdr->init_size,
1411 hdr->pref_address,
1412 hdr->kernel_alignment);
fb86b244
UW		 1413 if (status != EFI_SUCCESS) {
1414 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
9ca8f72a 1415 goto fail;
fb86b244 1416 }
4a9f3a7c
RF		 1417
1418 hdr->pref_address = hdr->code32_start;
1419 hdr->code32_start = bzimage_addr;
9ca8f72a
MF		 1420 }
1421
b8ff87a6 1422 status = exit_boot(boot_params, handle, is64);
fb86b244
UW		 1423 if (status != EFI_SUCCESS) {
1424 efi_printk(sys_table, "exit_boot() failed!\n");
291f3632 1425 goto fail;
fb86b244 1426 }
291f3632
MF		 1427
1428 memset((char *)gdt->address, 0x0, gdt->size);
1429 desc = (struct desc_struct *)gdt->address;
1430
1431 /* The first GDT is a dummy and the second is unused. */
1432 desc += 2;
1433
1434 desc->limit0 = 0xffff;
1435 desc->base0 = 0x0000;
1436 desc->base1 = 0x0000;
1437 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1438 desc->s = DESC_TYPE_CODE_DATA;
1439 desc->dpl = 0;
1440 desc->p = 1;
1441 desc->limit = 0xf;
1442 desc->avl = 0;
1443 desc->l = 0;
1444 desc->d = SEG_OP_SIZE_32BIT;
1445 desc->g = SEG_GRANULARITY_4KB;
1446 desc->base2 = 0x00;
1447
1448 desc++;
1449 desc->limit0 = 0xffff;
1450 desc->base0 = 0x0000;
1451 desc->base1 = 0x0000;
1452 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1453 desc->s = DESC_TYPE_CODE_DATA;
1454 desc->dpl = 0;
1455 desc->p = 1;
1456 desc->limit = 0xf;
1457 desc->avl = 0;
1458 desc->l = 0;
1459 desc->d = SEG_OP_SIZE_32BIT;
1460 desc->g = SEG_GRANULARITY_4KB;
1461 desc->base2 = 0x00;
1462
1463#ifdef CONFIG_X86_64
1464 /* Task segment value */
1465 desc++;
1466 desc->limit0 = 0x0000;
1467 desc->base0 = 0x0000;
1468 desc->base1 = 0x0000;
1469 desc->type = SEG_TYPE_TSS;
1470 desc->s = 0;
1471 desc->dpl = 0;
1472 desc->p = 1;
1473 desc->limit = 0x0;
1474 desc->avl = 0;
1475 desc->l = 0;
1476 desc->d = 0;
1477 desc->g = SEG_GRANULARITY_4KB;
1478 desc->base2 = 0x00;
1479#endif /* CONFIG_X86_64 */
1480
291f3632 1481 asm volatile("cli");
0ce6cda2 1482 asm volatile ("lgdt %0" : : "m" (*gdt));
291f3632
MF		 1483
1484 return boot_params;
1485fail:
fb86b244 1486 efi_printk(sys_table, "efi_main() failed!\n");
291f3632
MF		 1487 return NULL;
1488}
Linux 6.x block layer and io_uring tree(s)