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Merge remote-tracking branch 'tip/auto-latest'
[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
393f203f 16#include "../string.h"
291f3632
MF		 17#include "eboot.h"
18
19static efi_system_table_t *sys_table;
20
84be8805
MF		 21static struct efi_config *efi_early;
22
243b6754
AB		 23__pure const struct efi_config *__efi_early(void)
24{
25 return efi_early;
26}
204b0a1a 27
54b52d87
MF		 28#define BOOT_SERVICES(bits) \
29static void setup_boot_services##bits(struct efi_config *c) \
30{ \
31 efi_system_table_##bits##_t *table; \
32 efi_boot_services_##bits##_t *bt; \
33 \
34 table = (typeof(table))sys_table; \
35 \
36 c->text_output = table->con_out; \
37 \
38 bt = (typeof(bt))(unsigned long)(table->boottime); \
39 \
40 c->allocate_pool = bt->allocate_pool; \
41 c->allocate_pages = bt->allocate_pages; \
42 c->get_memory_map = bt->get_memory_map; \
43 c->free_pool = bt->free_pool; \
44 c->free_pages = bt->free_pages; \
45 c->locate_handle = bt->locate_handle; \
46 c->handle_protocol = bt->handle_protocol; \
47 c->exit_boot_services = bt->exit_boot_services; \
48}
49BOOT_SERVICES(32);
50BOOT_SERVICES(64);
291f3632 51
bd669475 52void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
54b52d87
MF		 53
54static efi_status_t
c116e8d6
MF		 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:
204b0a1a
MF		 84 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
85 info_sz, (void **)&info);
c116e8d6
MF		 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) {
204b0a1a 94 efi_call_early(free_pool, info);
c116e8d6
MF		 95 goto grow;
96 }
97
98 *file_sz = info->file_size;
204b0a1a 99 efi_call_early(free_pool, info);
c116e8d6
MF		 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)
54b52d87 110{
c116e8d6 111 efi_file_handle_64_t *h, *fh = __fh;
54b52d87
MF		 112 efi_file_info_t *info;
113 efi_status_t status;
114 efi_guid_t info_guid = EFI_FILE_INFO_ID;
396f1a08 115 u64 info_sz;
54b52d87
MF		 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:
204b0a1a
MF		 137 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
138 info_sz, (void **)&info);
54b52d87
MF		 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) {
204b0a1a 147 efi_call_early(free_pool, info);
54b52d87
MF		 148 goto grow;
149 }
150
151 *file_sz = info->file_size;
204b0a1a 152 efi_call_early(free_pool, info);
54b52d87
MF		 153
154 if (status != EFI_SUCCESS)
155 efi_printk(sys_table, "Failed to get initrd info\n");
156
157 return status;
158}
bd669475 159efi_status_t
c116e8d6
MF		 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}
54b52d87 168
bd669475 169efi_status_t
47514c99 170efi_file_read(void *handle, unsigned long *size, void *addr)
54b52d87 171{
c116e8d6
MF		 172 unsigned long func;
173
174 if (efi_early->is64) {
47514c99 175 efi_file_handle_64_t *fh = handle;
c116e8d6
MF		 176
177 func = (unsigned long)fh->read;
178 return efi_early->call(func, handle, size, addr);
179 } else {
47514c99 180 efi_file_handle_32_t *fh = handle;
c116e8d6
MF		 181
182 func = (unsigned long)fh->read;
183 return efi_early->call(func, handle, size, addr);
184 }
54b52d87
MF		 185}
186
bd669475 187efi_status_t efi_file_close(void *handle)
54b52d87 188{
c116e8d6 189 if (efi_early->is64) {
47514c99 190 efi_file_handle_64_t *fh = handle;
c116e8d6
MF		 191
192 return efi_early->call((unsigned long)fh->close, handle);
193 } else {
47514c99 194 efi_file_handle_32_t *fh = handle;
c116e8d6
MF		 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
204b0a1a
MF		 210 status = efi_call_early(handle_protocol, handle,
211 &fs_proto, (void **)&io);
c116e8d6
MF		 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");
291f3632 221
c116e8d6
MF		 222 *__fh = fh;
223 return status;
54b52d87
MF		 224}
225
c116e8d6 226static inline efi_status_t __open_volume64(void *__image, void **__fh)
54b52d87
MF		 227{
228 efi_file_io_interface_t *io;
c116e8d6
MF		 229 efi_loaded_image_64_t *image = __image;
230 efi_file_handle_64_t *fh;
54b52d87
MF		 231 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
232 efi_status_t status;
233 void *handle = (void *)(unsigned long)image->device_handle;
c116e8d6 234 unsigned long func;
54b52d87 235
204b0a1a
MF		 236 status = efi_call_early(handle_protocol, handle,
237 &fs_proto, (void **)&io);
54b52d87
MF		 238 if (status != EFI_SUCCESS) {
239 efi_printk(sys_table, "Failed to handle fs_proto\n");
240 return status;
241 }
291f3632 242
54b52d87
MF		 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
bd669475 252efi_status_t
c116e8d6
MF		 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
bd669475 261void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
54b52d87 262{
54b52d87
MF		 263 unsigned long output_string;
264 size_t offset;
54b52d87 265
c116e8d6
MF		 266 if (efi_early->is64) {
267 struct efi_simple_text_output_protocol_64 *out;
268 u64 *func;
54b52d87 269
c116e8d6
MF		 270 offset = offsetof(typeof(*out), output_string);
271 output_string = efi_early->text_output + offset;
115c6628 272 out = (typeof(out))(unsigned long)efi_early->text_output;
c116e8d6
MF		 273 func = (u64 *)output_string;
274
115c6628 275 efi_early->call(*func, out, str);
c116e8d6
MF		 276 } else {
277 struct efi_simple_text_output_protocol_32 *out;
278 u32 *func;
279
280 offset = offsetof(typeof(*out), output_string);
281 output_string = efi_early->text_output + offset;
115c6628 282 out = (typeof(out))(unsigned long)efi_early->text_output;
c116e8d6
MF		 283 func = (u32 *)output_string;
284
115c6628 285 efi_early->call(*func, out, str);
c116e8d6 286 }
54b52d87
MF		 287}
288
291f3632
MF		 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
c116e8d6
MF		 312static efi_status_t
313__setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
dd5fc854 314{
c116e8d6 315 struct pci_setup_rom *rom = NULL;
dd5fc854 316 efi_status_t status;
c116e8d6
MF		 317 unsigned long size;
318 uint64_t attributes;
dd5fc854 319
c116e8d6
MF		 320 status = efi_early->call(pci->attributes, pci,
321 EfiPciIoAttributeOperationGet, 0, 0,
322 &attributes);
323 if (status != EFI_SUCCESS)
324 return status;
dd5fc854 325
c116e8d6
MF		 326 if (!pci->romimage || !pci->romsize)
327 return EFI_INVALID_PARAMETER;
dd5fc854 328
c116e8d6 329 size = pci->romsize + sizeof(*rom);
dd5fc854 330
204b0a1a 331 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
77e21e87
AM		 332 if (status != EFI_SUCCESS) {
333 efi_printk(sys_table, "Failed to alloc mem for rom\n");
c116e8d6 334 return status;
77e21e87 335 }
dd5fc854 336
c116e8d6
MF		 337 memset(rom, 0, sizeof(*rom));
338
339 rom->data.type = SETUP_PCI;
340 rom->data.len = size - sizeof(struct setup_data);
341 rom->data.next = 0;
342 rom->pcilen = pci->romsize;
343 *__rom = rom;
344
345 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
346 PCI_VENDOR_ID, 1, &(rom->vendor));
dd5fc854 347
77e21e87
AM		 348 if (status != EFI_SUCCESS) {
349 efi_printk(sys_table, "Failed to read rom->vendor\n");
c116e8d6 350 goto free_struct;
77e21e87 351 }
c116e8d6
MF		 352
353 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
354 PCI_DEVICE_ID, 1, &(rom->devid));
355
77e21e87
AM		 356 if (status != EFI_SUCCESS) {
357 efi_printk(sys_table, "Failed to read rom->devid\n");
c116e8d6 358 goto free_struct;
77e21e87 359 }
c116e8d6
MF		 360
361 status = efi_early->call(pci->get_location, pci, &(rom->segment),
362 &(rom->bus), &(rom->device), &(rom->function));
363
364 if (status != EFI_SUCCESS)
365 goto free_struct;
366
367 memcpy(rom->romdata, pci->romimage, pci->romsize);
368 return status;
369
370free_struct:
204b0a1a 371 efi_call_early(free_pool, rom);
c116e8d6
MF		 372 return status;
373}
374
56394ab8 375static void
c116e8d6
MF		 376setup_efi_pci32(struct boot_params *params, void **pci_handle,
377 unsigned long size)
378{
379 efi_pci_io_protocol_32 *pci = NULL;
380 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
381 u32 *handles = (u32 *)(unsigned long)pci_handle;
382 efi_status_t status;
383 unsigned long nr_pci;
384 struct setup_data *data;
385 int i;
386
387 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
388
389 while (data && data->next)
390 data = (struct setup_data *)(unsigned long)data->next;
dd5fc854 391
c116e8d6 392 nr_pci = size / sizeof(u32);
dd5fc854 393 for (i = 0; i < nr_pci; i++) {
c116e8d6
MF		 394 struct pci_setup_rom *rom = NULL;
395 u32 h = handles[i];
dd5fc854 396
204b0a1a
MF		 397 status = efi_call_early(handle_protocol, h,
398 &pci_proto, (void **)&pci);
dd5fc854
MG		 399
400 if (status != EFI_SUCCESS)
401 continue;
402
403 if (!pci)
404 continue;
405
c116e8d6 406 status = __setup_efi_pci32(pci, &rom);
dd5fc854
MG		 407 if (status != EFI_SUCCESS)
408 continue;
409
c116e8d6
MF		 410 if (data)
411 data->next = (unsigned long)rom;
412 else
413 params->hdr.setup_data = (unsigned long)rom;
414
415 data = (struct setup_data *)rom;
dd5fc854 416
c116e8d6 417 }
c116e8d6 418}
dd5fc854 419
c116e8d6
MF		 420static efi_status_t
421__setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
422{
423 struct pci_setup_rom *rom;
424 efi_status_t status;
425 unsigned long size;
426 uint64_t attributes;
dd5fc854 427
c116e8d6
MF		 428 status = efi_early->call(pci->attributes, pci,
429 EfiPciIoAttributeOperationGet, 0,
430 &attributes);
431 if (status != EFI_SUCCESS)
432 return status;
dd5fc854 433
c116e8d6
MF		 434 if (!pci->romimage || !pci->romsize)
435 return EFI_INVALID_PARAMETER;
dd5fc854 436
c116e8d6 437 size = pci->romsize + sizeof(*rom);
dd5fc854 438
204b0a1a 439 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
77e21e87
AM		 440 if (status != EFI_SUCCESS) {
441 efi_printk(sys_table, "Failed to alloc mem for rom\n");
c116e8d6 442 return status;
77e21e87 443 }
c116e8d6
MF		 444
445 rom->data.type = SETUP_PCI;
446 rom->data.len = size - sizeof(struct setup_data);
447 rom->data.next = 0;
448 rom->pcilen = pci->romsize;
449 *__rom = rom;
450
451 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
452 PCI_VENDOR_ID, 1, &(rom->vendor));
453
77e21e87
AM		 454 if (status != EFI_SUCCESS) {
455 efi_printk(sys_table, "Failed to read rom->vendor\n");
c116e8d6 456 goto free_struct;
77e21e87 457 }
c116e8d6
MF		 458
459 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
460 PCI_DEVICE_ID, 1, &(rom->devid));
461
77e21e87
AM		 462 if (status != EFI_SUCCESS) {
463 efi_printk(sys_table, "Failed to read rom->devid\n");
c116e8d6 464 goto free_struct;
77e21e87 465 }
c116e8d6
MF		 466
467 status = efi_early->call(pci->get_location, pci, &(rom->segment),
468 &(rom->bus), &(rom->device), &(rom->function));
469
470 if (status != EFI_SUCCESS)
471 goto free_struct;
472
473 memcpy(rom->romdata, pci->romimage, pci->romsize);
474 return status;
475
476free_struct:
204b0a1a 477 efi_call_early(free_pool, rom);
c116e8d6
MF		 478 return status;
479
480}
481
56394ab8 482static void
c116e8d6
MF		 483setup_efi_pci64(struct boot_params *params, void **pci_handle,
484 unsigned long size)
485{
486 efi_pci_io_protocol_64 *pci = NULL;
487 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
488 u64 *handles = (u64 *)(unsigned long)pci_handle;
489 efi_status_t status;
490 unsigned long nr_pci;
491 struct setup_data *data;
492 int i;
dd5fc854 493
c116e8d6
MF		 494 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
495
496 while (data && data->next)
497 data = (struct setup_data *)(unsigned long)data->next;
498
499 nr_pci = size / sizeof(u64);
500 for (i = 0; i < nr_pci; i++) {
501 struct pci_setup_rom *rom = NULL;
502 u64 h = handles[i];
503
204b0a1a
MF		 504 status = efi_call_early(handle_protocol, h,
505 &pci_proto, (void **)&pci);
dd5fc854
MG		 506
507 if (status != EFI_SUCCESS)
c116e8d6
MF		 508 continue;
509
510 if (!pci)
511 continue;
dd5fc854 512
c116e8d6
MF		 513 status = __setup_efi_pci64(pci, &rom);
514 if (status != EFI_SUCCESS)
515 continue;
dd5fc854
MG		 516
517 if (data)
bc754790 518 data->next = (unsigned long)rom;
dd5fc854 519 else
bc754790 520 params->hdr.setup_data = (unsigned long)rom;
dd5fc854
MG		 521
522 data = (struct setup_data *)rom;
523
dd5fc854 524 }
dd5fc854
MG		 525}
526
56394ab8
MF		 527/*
528 * There's no way to return an informative status from this function,
529 * because any analysis (and printing of error messages) needs to be
530 * done directly at the EFI function call-site.
531 *
532 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
533 * just didn't find any PCI devices, but there's no way to tell outside
534 * the context of the call.
535 */
536static void setup_efi_pci(struct boot_params *params)
291f3632 537{
291f3632 538 efi_status_t status;
c116e8d6
MF		 539 void **pci_handle = NULL;
540 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
541 unsigned long size = 0;
291f3632 542
204b0a1a
MF		 543 status = efi_call_early(locate_handle,
544 EFI_LOCATE_BY_PROTOCOL,
545 &pci_proto, NULL, &size, pci_handle);
291f3632 546
c116e8d6 547 if (status == EFI_BUFFER_TOO_SMALL) {
204b0a1a
MF		 548 status = efi_call_early(allocate_pool,
549 EFI_LOADER_DATA,
550 size, (void **)&pci_handle);
291f3632 551
77e21e87
AM		 552 if (status != EFI_SUCCESS) {
553 efi_printk(sys_table, "Failed to alloc mem for pci_handle\n");
56394ab8 554 return;
77e21e87 555 }
291f3632 556
204b0a1a
MF		 557 status = efi_call_early(locate_handle,
558 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
559 NULL, &size, pci_handle);
291f3632
MF		 560 }
561
c116e8d6 562 if (status != EFI_SUCCESS)
291f3632
MF		 563 goto free_handle;
564
c116e8d6 565 if (efi_early->is64)
56394ab8 566 setup_efi_pci64(params, pci_handle, size);
c116e8d6 567 else
56394ab8 568 setup_efi_pci32(params, pci_handle, size);
291f3632 569
c116e8d6 570free_handle:
204b0a1a 571 efi_call_early(free_pool, pci_handle);
c116e8d6 572}
291f3632 573
c116e8d6
MF		 574static efi_status_t
575setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
576{
577 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
578 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
579 unsigned long nr_ugas;
580 u32 *handles = (u32 *)uga_handle;;
581 efi_status_t status;
582 int i;
583
291f3632 584 first_uga = NULL;
c116e8d6
MF		 585 nr_ugas = size / sizeof(u32);
586 for (i = 0; i < nr_ugas; i++) {
587 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
588 u32 w, h, depth, refresh;
589 void *pciio;
590 u32 handle = handles[i];
591
204b0a1a
MF		 592 status = efi_call_early(handle_protocol, handle,
593 &uga_proto, (void **)&uga);
c116e8d6
MF		 594 if (status != EFI_SUCCESS)
595 continue;
596
204b0a1a 597 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
c116e8d6
MF		 598
599 status = efi_early->call((unsigned long)uga->get_mode, uga,
600 &w, &h, &depth, &refresh);
601 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
602 *width = w;
603 *height = h;
604
605 /*
606 * Once we've found a UGA supporting PCIIO,
607 * don't bother looking any further.
608 */
609 if (pciio)
610 break;
611
612 first_uga = uga;
613 }
614 }
615
616 return status;
617}
291f3632 618
c116e8d6
MF		 619static efi_status_t
620setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
621{
622 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
623 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
624 unsigned long nr_ugas;
625 u64 *handles = (u64 *)uga_handle;;
626 efi_status_t status;
627 int i;
628
629 first_uga = NULL;
630 nr_ugas = size / sizeof(u64);
291f3632
MF		 631 for (i = 0; i < nr_ugas; i++) {
632 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
291f3632
MF		 633 u32 w, h, depth, refresh;
634 void *pciio;
c116e8d6 635 u64 handle = handles[i];
291f3632 636
204b0a1a
MF		 637 status = efi_call_early(handle_protocol, handle,
638 &uga_proto, (void **)&uga);
291f3632
MF		 639 if (status != EFI_SUCCESS)
640 continue;
641
204b0a1a 642 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
291f3632 643
54b52d87
MF		 644 status = efi_early->call((unsigned long)uga->get_mode, uga,
645 &w, &h, &depth, &refresh);
291f3632 646 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
c116e8d6
MF		 647 *width = w;
648 *height = h;
291f3632
MF		 649
650 /*
651 * Once we've found a UGA supporting PCIIO,
652 * don't bother looking any further.
653 */
654 if (pciio)
655 break;
656
657 first_uga = uga;
658 }
659 }
660
c116e8d6
MF		 661 return status;
662}
663
664/*
665 * See if we have Universal Graphics Adapter (UGA) protocol
666 */
667static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
668 unsigned long size)
669{
670 efi_status_t status;
671 u32 width, height;
672 void **uga_handle = NULL;
673
204b0a1a
MF		 674 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
675 size, (void **)&uga_handle);
c116e8d6
MF		 676 if (status != EFI_SUCCESS)
677 return status;
678
204b0a1a
MF		 679 status = efi_call_early(locate_handle,
680 EFI_LOCATE_BY_PROTOCOL,
681 uga_proto, NULL, &size, uga_handle);
c116e8d6
MF		 682 if (status != EFI_SUCCESS)
683 goto free_handle;
684
685 height = 0;
686 width = 0;
687
688 if (efi_early->is64)
689 status = setup_uga64(uga_handle, size, &width, &height);
690 else
691 status = setup_uga32(uga_handle, size, &width, &height);
692
693 if (!width && !height)
291f3632
MF		 694 goto free_handle;
695
696 /* EFI framebuffer */
697 si->orig_video_isVGA = VIDEO_TYPE_EFI;
698
699 si->lfb_depth = 32;
700 si->lfb_width = width;
701 si->lfb_height = height;
702
703 si->red_size = 8;
704 si->red_pos = 16;
705 si->green_size = 8;
706 si->green_pos = 8;
707 si->blue_size = 8;
708 si->blue_pos = 0;
709 si->rsvd_size = 8;
710 si->rsvd_pos = 24;
711
291f3632 712free_handle:
204b0a1a 713 efi_call_early(free_pool, uga_handle);
291f3632
MF		 714 return status;
715}
716
717void setup_graphics(struct boot_params *boot_params)
718{
719 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
720 struct screen_info *si;
721 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
722 efi_status_t status;
723 unsigned long size;
724 void **gop_handle = NULL;
725 void **uga_handle = NULL;
726
727 si = &boot_params->screen_info;
728 memset(si, 0, sizeof(*si));
729
730 size = 0;
204b0a1a
MF		 731 status = efi_call_early(locate_handle,
732 EFI_LOCATE_BY_PROTOCOL,
733 &graphics_proto, NULL, &size, gop_handle);
291f3632 734 if (status == EFI_BUFFER_TOO_SMALL)
2c23b73c 735 status = efi_setup_gop(NULL, si, &graphics_proto, size);
291f3632
MF		 736
737 if (status != EFI_SUCCESS) {
738 size = 0;
204b0a1a
MF		 739 status = efi_call_early(locate_handle,
740 EFI_LOCATE_BY_PROTOCOL,
741 &uga_proto, NULL, &size, uga_handle);
291f3632
MF		 742 if (status == EFI_BUFFER_TOO_SMALL)
743 setup_uga(si, &uga_proto, size);
744 }
745}
746
291f3632
MF		 747/*
748 * Because the x86 boot code expects to be passed a boot_params we
749 * need to create one ourselves (usually the bootloader would create
750 * one for us).
7e8213c1
MF		 751 *
752 * The caller is responsible for filling out ->code32_start in the
753 * returned boot_params.
291f3632 754 */
54b52d87 755struct boot_params *make_boot_params(struct efi_config *c)
291f3632 756{
9ca8f72a 757 struct boot_params *boot_params;
9ca8f72a
MF		 758 struct apm_bios_info *bi;
759 struct setup_header *hdr;
9ca8f72a 760 efi_loaded_image_t *image;
54b52d87 761 void *options, *handle;
9ca8f72a 762 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
291f3632
MF		 763 int options_size = 0;
764 efi_status_t status;
5fef3870 765 char *cmdline_ptr;
291f3632
MF		 766 u16 *s2;
767 u8 *s1;
768 int i;
46f4582e
RF		 769 unsigned long ramdisk_addr;
770 unsigned long ramdisk_size;
291f3632 771
54b52d87
MF		 772 efi_early = c;
773 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
774 handle = (void *)(unsigned long)efi_early->image_handle;
9ca8f72a
MF		 775
776 /* Check if we were booted by the EFI firmware */
777 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
778 return NULL;
779
54b52d87
MF		 780 if (efi_early->is64)
781 setup_boot_services64(efi_early);
782 else
783 setup_boot_services32(efi_early);
784
204b0a1a
MF		 785 status = efi_call_early(handle_protocol, handle,
786 &proto, (void *)&image);
9ca8f72a 787 if (status != EFI_SUCCESS) {
876dc36a 788 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
9ca8f72a
MF		 789 return NULL;
790 }
791
40e4530a
RF		 792 status = efi_low_alloc(sys_table, 0x4000, 1,
793 (unsigned long *)&boot_params);
9ca8f72a 794 if (status != EFI_SUCCESS) {
876dc36a 795 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
9ca8f72a
MF		 796 return NULL;
797 }
798
799 memset(boot_params, 0x0, 0x4000);
800
801 hdr = &boot_params->hdr;
9ca8f72a 802 bi = &boot_params->apm_bios_info;
9ca8f72a
MF		 803
804 /* Copy the second sector to boot_params */
805 memcpy(&hdr->jump, image->image_base + 512, 512);
806
807 /*
808 * Fill out some of the header fields ourselves because the
809 * EFI firmware loader doesn't load the first sector.
810 */
811 hdr->root_flags = 1;
812 hdr->vid_mode = 0xffff;
813 hdr->boot_flag = 0xAA55;
814
291f3632
MF		 815 hdr->type_of_loader = 0x21;
816
817 /* Convert unicode cmdline to ascii */
c625d1c2 818 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
5fef3870
RF		 819 if (!cmdline_ptr)
820 goto fail;
821 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
98b228f5
RF		 822 /* Fill in upper bits of command line address, NOP on 32 bit */
823 boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
291f3632
MF		 824
825 hdr->ramdisk_image = 0;
826 hdr->ramdisk_size = 0;
827
291f3632
MF		 828 /* Clear APM BIOS info */
829 memset(bi, 0, sizeof(*bi));
830
5a17dae4
MF		 831 status = efi_parse_options(cmdline_ptr);
832 if (status != EFI_SUCCESS)
833 goto fail2;
834
46f4582e
RF		 835 status = handle_cmdline_files(sys_table, image,
836 (char *)(unsigned long)hdr->cmd_line_ptr,
47226ad4 837 "initrd=", hdr->initrd_addr_max,
46f4582e 838 &ramdisk_addr, &ramdisk_size);
47226ad4
YL		 839
840 if (status != EFI_SUCCESS &&
841 hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
842 efi_printk(sys_table, "Trying to load files to higher address\n");
843 status = handle_cmdline_files(sys_table, image,
844 (char *)(unsigned long)hdr->cmd_line_ptr,
845 "initrd=", -1UL,
846 &ramdisk_addr, &ramdisk_size);
847 }
848
9ca8f72a
MF		 849 if (status != EFI_SUCCESS)
850 goto fail2;
4bf7111f
YL		 851 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
852 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
853 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
854 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
9ca8f72a
MF		 855
856 return boot_params;
857fail2:
0e1cadb0 858 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
9ca8f72a 859fail:
40e4530a 860 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
9ca8f72a
MF		 861 return NULL;
862}
863
d2078d5a
LC		 864static void add_e820ext(struct boot_params *params,
865 struct setup_data *e820ext, u32 nr_entries)
9ca8f72a 866{
d2078d5a 867 struct setup_data *data;
9ca8f72a 868 efi_status_t status;
d2078d5a 869 unsigned long size;
291f3632 870
d2078d5a
LC		 871 e820ext->type = SETUP_E820_EXT;
872 e820ext->len = nr_entries * sizeof(struct e820entry);
873 e820ext->next = 0;
291f3632 874
d2078d5a 875 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
291f3632 876
d2078d5a
LC		 877 while (data && data->next)
878 data = (struct setup_data *)(unsigned long)data->next;
d3768d88 879
d2078d5a
LC		 880 if (data)
881 data->next = (unsigned long)e820ext;
882 else
883 params->hdr.setup_data = (unsigned long)e820ext;
884}
291f3632 885
d2078d5a
LC		 886static efi_status_t setup_e820(struct boot_params *params,
887 struct setup_data *e820ext, u32 e820ext_size)
888{
889 struct e820entry *e820_map = &params->e820_map[0];
890 struct efi_info *efi = &params->efi_info;
891 struct e820entry *prev = NULL;
892 u32 nr_entries;
893 u32 nr_desc;
894 int i;
291f3632 895
291f3632 896 nr_entries = 0;
d2078d5a
LC		 897 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
898
899 for (i = 0; i < nr_desc; i++) {
291f3632
MF		 900 efi_memory_desc_t *d;
901 unsigned int e820_type = 0;
d2078d5a 902 unsigned long m = efi->efi_memmap;
291f3632 903
7cc03e48
DS		 904#ifdef CONFIG_X86_64
905 m |= (u64)efi->efi_memmap_hi << 32;
906#endif
907
d2078d5a 908 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
291f3632
MF		 909 switch (d->type) {
910 case EFI_RESERVED_TYPE:
911 case EFI_RUNTIME_SERVICES_CODE:
912 case EFI_RUNTIME_SERVICES_DATA:
913 case EFI_MEMORY_MAPPED_IO:
914 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
915 case EFI_PAL_CODE:
916 e820_type = E820_RESERVED;
917 break;
918
919 case EFI_UNUSABLE_MEMORY:
920 e820_type = E820_UNUSABLE;
921 break;
922
923 case EFI_ACPI_RECLAIM_MEMORY:
924 e820_type = E820_ACPI;
925 break;
926
927 case EFI_LOADER_CODE:
928 case EFI_LOADER_DATA:
929 case EFI_BOOT_SERVICES_CODE:
930 case EFI_BOOT_SERVICES_DATA:
931 case EFI_CONVENTIONAL_MEMORY:
932 e820_type = E820_RAM;
933 break;
934
935 case EFI_ACPI_MEMORY_NVS:
936 e820_type = E820_NVS;
937 break;
938
ad5fb870
DW		 939 case EFI_PERSISTENT_MEMORY:
940 e820_type = E820_PMEM;
941 break;
942
291f3632
MF		 943 default:
944 continue;
945 }
946
947 /* Merge adjacent mappings */
948 if (prev && prev->type == e820_type &&
d2078d5a 949 (prev->addr + prev->size) == d->phys_addr) {
291f3632 950 prev->size += d->num_pages << 12;
d2078d5a 951 continue;
291f3632 952 }
d2078d5a
LC		 953
954 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
955 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
956 sizeof(struct setup_data);
957
958 if (!e820ext || e820ext_size < need)
959 return EFI_BUFFER_TOO_SMALL;
960
961 /* boot_params map full, switch to e820 extended */
962 e820_map = (struct e820entry *)e820ext->data;
963 }
964
965 e820_map->addr = d->phys_addr;
966 e820_map->size = d->num_pages << PAGE_SHIFT;
967 e820_map->type = e820_type;
968 prev = e820_map++;
969 nr_entries++;
291f3632
MF		 970 }
971
d2078d5a
LC		 972 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
973 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
974
975 add_e820ext(params, e820ext, nr_e820ext);
976 nr_entries -= nr_e820ext;
977 }
978
979 params->e820_entries = (u8)nr_entries;
980
981 return EFI_SUCCESS;
982}
983
984static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
985 u32 *e820ext_size)
986{
987 efi_status_t status;
988 unsigned long size;
989
990 size = sizeof(struct setup_data) +
991 sizeof(struct e820entry) * nr_desc;
992
993 if (*e820ext) {
204b0a1a 994 efi_call_early(free_pool, *e820ext);
d2078d5a
LC		 995 *e820ext = NULL;
996 *e820ext_size = 0;
997 }
998
204b0a1a
MF		 999 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1000 size, (void **)e820ext);
d2078d5a
LC		 1001 if (status == EFI_SUCCESS)
1002 *e820ext_size = size;
1003
1004 return status;
1005}
1006
d6493401
JH		 1007struct exit_boot_struct {
1008 struct boot_params *boot_params;
1009 struct efi_info *efi;
1010 struct setup_data *e820ext;
1011 __u32 e820ext_size;
1012 bool is64;
1013};
1014
1015static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg,
1016 struct efi_boot_memmap *map,
1017 void *priv)
1018{
1019 static bool first = true;
1020 const char *signature;
1021 __u32 nr_desc;
1022 efi_status_t status;
1023 struct exit_boot_struct *p = priv;
1024
1025 if (first) {
1026 nr_desc = *map->buff_size / *map->desc_size;
1027 if (nr_desc > ARRAY_SIZE(p->boot_params->e820_map)) {
1028 u32 nr_e820ext = nr_desc -
1029 ARRAY_SIZE(p->boot_params->e820_map);
1030
1031 status = alloc_e820ext(nr_e820ext, &p->e820ext,
1032 &p->e820ext_size);
1033 if (status != EFI_SUCCESS)
1034 return status;
1035 }
1036 first = false;
1037 }
1038
1039 signature = p->is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1040 memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32));
1041
1042 p->efi->efi_systab = (unsigned long)sys_table_arg;
1043 p->efi->efi_memdesc_size = *map->desc_size;
1044 p->efi->efi_memdesc_version = *map->desc_ver;
1045 p->efi->efi_memmap = (unsigned long)*map->map;
1046 p->efi->efi_memmap_size = *map->map_size;
1047
1048#ifdef CONFIG_X86_64
1049 p->efi->efi_systab_hi = (unsigned long)sys_table_arg >> 32;
1050 p->efi->efi_memmap_hi = (unsigned long)*map->map >> 32;
1051#endif
1052
1053 return EFI_SUCCESS;
1054}
1055
d2078d5a 1056static efi_status_t exit_boot(struct boot_params *boot_params,
b8ff87a6 1057 void *handle, bool is64)
d2078d5a 1058{
dadb57ab 1059 unsigned long map_sz, key, desc_size, buff_size;
d2078d5a
LC		 1060 efi_memory_desc_t *mem_map;
1061 struct setup_data *e820ext;
1062 __u32 e820ext_size;
d2078d5a
LC		 1063 efi_status_t status;
1064 __u32 desc_version;
dadb57ab 1065 struct efi_boot_memmap map;
d6493401
JH		 1066 struct exit_boot_struct priv;
1067
1068 map.map = &mem_map;
1069 map.map_size = &map_sz;
1070 map.desc_size = &desc_size;
1071 map.desc_ver = &desc_version;
1072 map.key_ptr = &key;
1073 map.buff_size = &buff_size;
1074 priv.boot_params = boot_params;
1075 priv.efi = &boot_params->efi_info;
1076 priv.e820ext = NULL;
1077 priv.e820ext_size = 0;
1078 priv.is64 = is64;
dadb57ab 1079
d6493401
JH		 1080 /* Might as well exit boot services now */
1081 status = efi_exit_boot_services(sys_table, handle, &map, &priv,
1082 exit_boot_func);
d2078d5a
LC		 1083 if (status != EFI_SUCCESS)
1084 return status;
1085
d6493401
JH		 1086 e820ext = priv.e820ext;
1087 e820ext_size = priv.e820ext_size;
d2078d5a
LC		 1088 /* Historic? */
1089 boot_params->alt_mem_k = 32 * 1024;
1090
1091 status = setup_e820(boot_params, e820ext, e820ext_size);
1092 if (status != EFI_SUCCESS)
1093 return status;
291f3632
MF		 1094
1095 return EFI_SUCCESS;
291f3632
MF		 1096}
1097
9ca8f72a
MF		 1098/*
1099 * On success we return a pointer to a boot_params structure, and NULL
1100 * on failure.
1101 */
54b52d87 1102struct boot_params *efi_main(struct efi_config *c,
9ca8f72a
MF		 1103 struct boot_params *boot_params)
1104{
54b52d87 1105 struct desc_ptr *gdt = NULL;
9ca8f72a
MF		 1106 efi_loaded_image_t *image;
1107 struct setup_header *hdr = &boot_params->hdr;
1108 efi_status_t status;
1109 struct desc_struct *desc;
54b52d87
MF		 1110 void *handle;
1111 efi_system_table_t *_table;
1112 bool is64;
1113
1114 efi_early = c;
1115
1116 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1117 handle = (void *)(unsigned long)efi_early->image_handle;
1118 is64 = efi_early->is64;
9ca8f72a
MF		 1119
1120 sys_table = _table;
1121
1122 /* Check if we were booted by the EFI firmware */
1123 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1124 goto fail;
1125
54b52d87
MF		 1126 if (is64)
1127 setup_boot_services64(efi_early);
1128 else
1129 setup_boot_services32(efi_early);
1130
9ca8f72a 1131 setup_graphics(boot_params);
291f3632 1132
56394ab8 1133 setup_efi_pci(boot_params);
dd5fc854 1134
204b0a1a
MF		 1135 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1136 sizeof(*gdt), (void **)&gdt);
9fa7deda 1137 if (status != EFI_SUCCESS) {
876dc36a 1138 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
291f3632 1139 goto fail;
9fa7deda 1140 }
291f3632
MF		 1141
1142 gdt->size = 0x800;
40e4530a 1143 status = efi_low_alloc(sys_table, gdt->size, 8,
876dc36a 1144 (unsigned long *)&gdt->address);
9fa7deda 1145 if (status != EFI_SUCCESS) {
876dc36a 1146 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
291f3632 1147 goto fail;
9fa7deda 1148 }
291f3632 1149
9ca8f72a
MF		 1150 /*
1151 * If the kernel isn't already loaded at the preferred load
1152 * address, relocate it.
1153 */
1154 if (hdr->pref_address != hdr->code32_start) {
4a9f3a7c
RF		 1155 unsigned long bzimage_addr = hdr->code32_start;
1156 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1157 hdr->init_size, hdr->init_size,
1158 hdr->pref_address,
1159 hdr->kernel_alignment);
fb86b244
UW		 1160 if (status != EFI_SUCCESS) {
1161 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
9ca8f72a 1162 goto fail;
fb86b244 1163 }
4a9f3a7c
RF		 1164
1165 hdr->pref_address = hdr->code32_start;
1166 hdr->code32_start = bzimage_addr;
9ca8f72a
MF		 1167 }
1168
b8ff87a6 1169 status = exit_boot(boot_params, handle, is64);
fb86b244
UW		 1170 if (status != EFI_SUCCESS) {
1171 efi_printk(sys_table, "exit_boot() failed!\n");
291f3632 1172 goto fail;
fb86b244 1173 }
291f3632
MF		 1174
1175 memset((char *)gdt->address, 0x0, gdt->size);
1176 desc = (struct desc_struct *)gdt->address;
1177
1178 /* The first GDT is a dummy and the second is unused. */
1179 desc += 2;
1180
1181 desc->limit0 = 0xffff;
1182 desc->base0 = 0x0000;
1183 desc->base1 = 0x0000;
1184 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1185 desc->s = DESC_TYPE_CODE_DATA;
1186 desc->dpl = 0;
1187 desc->p = 1;
1188 desc->limit = 0xf;
1189 desc->avl = 0;
1190 desc->l = 0;
1191 desc->d = SEG_OP_SIZE_32BIT;
1192 desc->g = SEG_GRANULARITY_4KB;
1193 desc->base2 = 0x00;
1194
1195 desc++;
1196 desc->limit0 = 0xffff;
1197 desc->base0 = 0x0000;
1198 desc->base1 = 0x0000;
1199 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1200 desc->s = DESC_TYPE_CODE_DATA;
1201 desc->dpl = 0;
1202 desc->p = 1;
1203 desc->limit = 0xf;
1204 desc->avl = 0;
1205 desc->l = 0;
1206 desc->d = SEG_OP_SIZE_32BIT;
1207 desc->g = SEG_GRANULARITY_4KB;
1208 desc->base2 = 0x00;
1209
1210#ifdef CONFIG_X86_64
1211 /* Task segment value */
1212 desc++;
1213 desc->limit0 = 0x0000;
1214 desc->base0 = 0x0000;
1215 desc->base1 = 0x0000;
1216 desc->type = SEG_TYPE_TSS;
1217 desc->s = 0;
1218 desc->dpl = 0;
1219 desc->p = 1;
1220 desc->limit = 0x0;
1221 desc->avl = 0;
1222 desc->l = 0;
1223 desc->d = 0;
1224 desc->g = SEG_GRANULARITY_4KB;
1225 desc->base2 = 0x00;
1226#endif /* CONFIG_X86_64 */
1227
291f3632 1228 asm volatile("cli");
0ce6cda2 1229 asm volatile ("lgdt %0" : : "m" (*gdt));
291f3632
MF		 1230
1231 return boot_params;
1232fail:
fb86b244 1233 efi_printk(sys_table, "efi_main() failed!\n");
291f3632
MF		 1234 return NULL;
1235}
Linux kernel - Deliverables
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