Commit | Line | Data |
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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 | ||
20 | static efi_system_table_t *sys_table; | |
21 | ||
9fa7deda MF |
22 | static void efi_printk(char *str) |
23 | { | |
24 | char *s8; | |
25 | ||
26 | for (s8 = str; *s8; s8++) { | |
27 | struct efi_simple_text_output_protocol *out; | |
28 | efi_char16_t ch[2] = { 0 }; | |
29 | ||
30 | ch[0] = *s8; | |
31 | out = (struct efi_simple_text_output_protocol *)sys_table->con_out; | |
32 | ||
33 | if (*s8 == '\n') { | |
34 | efi_char16_t nl[2] = { '\r', 0 }; | |
35 | efi_call_phys2(out->output_string, out, nl); | |
36 | } | |
37 | ||
38 | efi_call_phys2(out->output_string, out, ch); | |
39 | } | |
40 | } | |
41 | ||
291f3632 MF |
42 | static efi_status_t __get_map(efi_memory_desc_t **map, unsigned long *map_size, |
43 | unsigned long *desc_size) | |
44 | { | |
45 | efi_memory_desc_t *m = NULL; | |
46 | efi_status_t status; | |
47 | unsigned long key; | |
48 | u32 desc_version; | |
49 | ||
50 | *map_size = sizeof(*m) * 32; | |
51 | again: | |
52 | /* | |
53 | * Add an additional efi_memory_desc_t because we're doing an | |
54 | * allocation which may be in a new descriptor region. | |
55 | */ | |
56 | *map_size += sizeof(*m); | |
57 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
58 | EFI_LOADER_DATA, *map_size, (void **)&m); | |
59 | if (status != EFI_SUCCESS) | |
60 | goto fail; | |
61 | ||
62 | status = efi_call_phys5(sys_table->boottime->get_memory_map, map_size, | |
63 | m, &key, desc_size, &desc_version); | |
64 | if (status == EFI_BUFFER_TOO_SMALL) { | |
65 | efi_call_phys1(sys_table->boottime->free_pool, m); | |
66 | goto again; | |
67 | } | |
68 | ||
69 | if (status != EFI_SUCCESS) | |
70 | efi_call_phys1(sys_table->boottime->free_pool, m); | |
71 | ||
72 | fail: | |
73 | *map = m; | |
74 | return status; | |
75 | } | |
76 | ||
77 | /* | |
78 | * Allocate at the highest possible address that is not above 'max'. | |
79 | */ | |
80 | static efi_status_t high_alloc(unsigned long size, unsigned long align, | |
81 | unsigned long *addr, unsigned long max) | |
82 | { | |
83 | unsigned long map_size, desc_size; | |
84 | efi_memory_desc_t *map; | |
85 | efi_status_t status; | |
86 | unsigned long nr_pages; | |
87 | u64 max_addr = 0; | |
88 | int i; | |
89 | ||
90 | status = __get_map(&map, &map_size, &desc_size); | |
91 | if (status != EFI_SUCCESS) | |
92 | goto fail; | |
93 | ||
94 | nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE; | |
95 | again: | |
96 | for (i = 0; i < map_size / desc_size; i++) { | |
97 | efi_memory_desc_t *desc; | |
98 | unsigned long m = (unsigned long)map; | |
99 | u64 start, end; | |
100 | ||
101 | desc = (efi_memory_desc_t *)(m + (i * desc_size)); | |
102 | if (desc->type != EFI_CONVENTIONAL_MEMORY) | |
103 | continue; | |
104 | ||
105 | if (desc->num_pages < nr_pages) | |
106 | continue; | |
107 | ||
108 | start = desc->phys_addr; | |
109 | end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT); | |
110 | ||
111 | if ((start + size) > end || (start + size) > max) | |
112 | continue; | |
113 | ||
114 | if (end - size > max) | |
115 | end = max; | |
116 | ||
117 | if (round_down(end - size, align) < start) | |
118 | continue; | |
119 | ||
120 | start = round_down(end - size, align); | |
121 | ||
122 | /* | |
123 | * Don't allocate at 0x0. It will confuse code that | |
124 | * checks pointers against NULL. | |
125 | */ | |
126 | if (start == 0x0) | |
127 | continue; | |
128 | ||
129 | if (start > max_addr) | |
130 | max_addr = start; | |
131 | } | |
132 | ||
133 | if (!max_addr) | |
134 | status = EFI_NOT_FOUND; | |
135 | else { | |
136 | status = efi_call_phys4(sys_table->boottime->allocate_pages, | |
137 | EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA, | |
138 | nr_pages, &max_addr); | |
139 | if (status != EFI_SUCCESS) { | |
140 | max = max_addr; | |
141 | max_addr = 0; | |
142 | goto again; | |
143 | } | |
144 | ||
145 | *addr = max_addr; | |
146 | } | |
147 | ||
148 | free_pool: | |
149 | efi_call_phys1(sys_table->boottime->free_pool, map); | |
150 | ||
151 | fail: | |
152 | return status; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Allocate at the lowest possible address. | |
157 | */ | |
158 | static efi_status_t low_alloc(unsigned long size, unsigned long align, | |
159 | unsigned long *addr) | |
160 | { | |
161 | unsigned long map_size, desc_size; | |
162 | efi_memory_desc_t *map; | |
163 | efi_status_t status; | |
164 | unsigned long nr_pages; | |
165 | int i; | |
166 | ||
167 | status = __get_map(&map, &map_size, &desc_size); | |
168 | if (status != EFI_SUCCESS) | |
169 | goto fail; | |
170 | ||
171 | nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE; | |
172 | for (i = 0; i < map_size / desc_size; i++) { | |
173 | efi_memory_desc_t *desc; | |
174 | unsigned long m = (unsigned long)map; | |
175 | u64 start, end; | |
176 | ||
177 | desc = (efi_memory_desc_t *)(m + (i * desc_size)); | |
178 | ||
179 | if (desc->type != EFI_CONVENTIONAL_MEMORY) | |
180 | continue; | |
181 | ||
182 | if (desc->num_pages < nr_pages) | |
183 | continue; | |
184 | ||
185 | start = desc->phys_addr; | |
186 | end = start + desc->num_pages * (1UL << EFI_PAGE_SHIFT); | |
187 | ||
188 | /* | |
189 | * Don't allocate at 0x0. It will confuse code that | |
190 | * checks pointers against NULL. Skip the first 8 | |
191 | * bytes so we start at a nice even number. | |
192 | */ | |
193 | if (start == 0x0) | |
194 | start += 8; | |
195 | ||
196 | start = round_up(start, align); | |
197 | if ((start + size) > end) | |
198 | continue; | |
199 | ||
200 | status = efi_call_phys4(sys_table->boottime->allocate_pages, | |
201 | EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA, | |
202 | nr_pages, &start); | |
203 | if (status == EFI_SUCCESS) { | |
204 | *addr = start; | |
205 | break; | |
206 | } | |
207 | } | |
208 | ||
209 | if (i == map_size / desc_size) | |
210 | status = EFI_NOT_FOUND; | |
211 | ||
212 | free_pool: | |
213 | efi_call_phys1(sys_table->boottime->free_pool, map); | |
214 | fail: | |
215 | return status; | |
216 | } | |
217 | ||
218 | static void low_free(unsigned long size, unsigned long addr) | |
219 | { | |
220 | unsigned long nr_pages; | |
221 | ||
222 | nr_pages = round_up(size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE; | |
223 | efi_call_phys2(sys_table->boottime->free_pages, addr, size); | |
224 | } | |
225 | ||
226 | static void find_bits(unsigned long mask, u8 *pos, u8 *size) | |
227 | { | |
228 | u8 first, len; | |
229 | ||
230 | first = 0; | |
231 | len = 0; | |
232 | ||
233 | if (mask) { | |
234 | while (!(mask & 0x1)) { | |
235 | mask = mask >> 1; | |
236 | first++; | |
237 | } | |
238 | ||
239 | while (mask & 0x1) { | |
240 | mask = mask >> 1; | |
241 | len++; | |
242 | } | |
243 | } | |
244 | ||
245 | *pos = first; | |
246 | *size = len; | |
247 | } | |
248 | ||
dd5fc854 MG |
249 | static efi_status_t setup_efi_pci(struct boot_params *params) |
250 | { | |
251 | efi_pci_io_protocol *pci; | |
252 | efi_status_t status; | |
253 | void **pci_handle; | |
254 | efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; | |
255 | unsigned long nr_pci, size = 0; | |
256 | int i; | |
257 | struct setup_data *data; | |
258 | ||
259 | data = (struct setup_data *)params->hdr.setup_data; | |
260 | ||
261 | while (data && data->next) | |
262 | data = (struct setup_data *)data->next; | |
263 | ||
264 | status = efi_call_phys5(sys_table->boottime->locate_handle, | |
265 | EFI_LOCATE_BY_PROTOCOL, &pci_proto, | |
266 | NULL, &size, pci_handle); | |
267 | ||
268 | if (status == EFI_BUFFER_TOO_SMALL) { | |
269 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
270 | EFI_LOADER_DATA, size, &pci_handle); | |
271 | ||
272 | if (status != EFI_SUCCESS) | |
273 | return status; | |
274 | ||
275 | status = efi_call_phys5(sys_table->boottime->locate_handle, | |
276 | EFI_LOCATE_BY_PROTOCOL, &pci_proto, | |
277 | NULL, &size, pci_handle); | |
278 | } | |
279 | ||
280 | if (status != EFI_SUCCESS) | |
281 | goto free_handle; | |
282 | ||
283 | nr_pci = size / sizeof(void *); | |
284 | for (i = 0; i < nr_pci; i++) { | |
285 | void *h = pci_handle[i]; | |
286 | uint64_t attributes; | |
287 | struct pci_setup_rom *rom; | |
288 | ||
289 | status = efi_call_phys3(sys_table->boottime->handle_protocol, | |
290 | h, &pci_proto, &pci); | |
291 | ||
292 | if (status != EFI_SUCCESS) | |
293 | continue; | |
294 | ||
295 | if (!pci) | |
296 | continue; | |
297 | ||
298 | status = efi_call_phys4(pci->attributes, pci, | |
299 | EfiPciIoAttributeOperationGet, 0, | |
300 | &attributes); | |
301 | ||
302 | if (status != EFI_SUCCESS) | |
303 | continue; | |
304 | ||
886d751a | 305 | if (!(attributes & EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM)) |
dd5fc854 MG |
306 | continue; |
307 | ||
308 | if (!pci->romimage || !pci->romsize) | |
309 | continue; | |
310 | ||
311 | size = pci->romsize + sizeof(*rom); | |
312 | ||
313 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
314 | EFI_LOADER_DATA, size, &rom); | |
315 | ||
316 | if (status != EFI_SUCCESS) | |
317 | continue; | |
318 | ||
319 | rom->data.type = SETUP_PCI; | |
320 | rom->data.len = size - sizeof(struct setup_data); | |
321 | rom->data.next = 0; | |
322 | rom->pcilen = pci->romsize; | |
323 | ||
324 | status = efi_call_phys5(pci->pci.read, pci, | |
325 | EfiPciIoWidthUint16, PCI_VENDOR_ID, | |
326 | 1, &(rom->vendor)); | |
327 | ||
328 | if (status != EFI_SUCCESS) | |
329 | goto free_struct; | |
330 | ||
331 | status = efi_call_phys5(pci->pci.read, pci, | |
332 | EfiPciIoWidthUint16, PCI_DEVICE_ID, | |
333 | 1, &(rom->devid)); | |
334 | ||
335 | if (status != EFI_SUCCESS) | |
336 | goto free_struct; | |
337 | ||
338 | status = efi_call_phys5(pci->get_location, pci, | |
339 | &(rom->segment), &(rom->bus), | |
340 | &(rom->device), &(rom->function)); | |
341 | ||
342 | if (status != EFI_SUCCESS) | |
343 | goto free_struct; | |
344 | ||
345 | memcpy(rom->romdata, pci->romimage, pci->romsize); | |
346 | ||
347 | if (data) | |
348 | data->next = (uint64_t)rom; | |
349 | else | |
350 | params->hdr.setup_data = (uint64_t)rom; | |
351 | ||
352 | data = (struct setup_data *)rom; | |
353 | ||
354 | continue; | |
355 | free_struct: | |
356 | efi_call_phys1(sys_table->boottime->free_pool, rom); | |
357 | } | |
358 | ||
359 | free_handle: | |
360 | efi_call_phys1(sys_table->boottime->free_pool, pci_handle); | |
361 | return status; | |
362 | } | |
363 | ||
291f3632 MF |
364 | /* |
365 | * See if we have Graphics Output Protocol | |
366 | */ | |
367 | static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, | |
368 | unsigned long size) | |
369 | { | |
370 | struct efi_graphics_output_protocol *gop, *first_gop; | |
371 | struct efi_pixel_bitmask pixel_info; | |
372 | unsigned long nr_gops; | |
373 | efi_status_t status; | |
374 | void **gop_handle; | |
375 | u16 width, height; | |
376 | u32 fb_base, fb_size; | |
377 | u32 pixels_per_scan_line; | |
378 | int pixel_format; | |
379 | int i; | |
380 | ||
381 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
382 | EFI_LOADER_DATA, size, &gop_handle); | |
383 | if (status != EFI_SUCCESS) | |
384 | return status; | |
385 | ||
386 | status = efi_call_phys5(sys_table->boottime->locate_handle, | |
387 | EFI_LOCATE_BY_PROTOCOL, proto, | |
388 | NULL, &size, gop_handle); | |
389 | if (status != EFI_SUCCESS) | |
390 | goto free_handle; | |
391 | ||
392 | first_gop = NULL; | |
393 | ||
394 | nr_gops = size / sizeof(void *); | |
395 | for (i = 0; i < nr_gops; i++) { | |
396 | struct efi_graphics_output_mode_info *info; | |
38cb5ef4 MG |
397 | efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID; |
398 | bool conout_found = false; | |
399 | void *dummy; | |
291f3632 MF |
400 | void *h = gop_handle[i]; |
401 | ||
402 | status = efi_call_phys3(sys_table->boottime->handle_protocol, | |
403 | h, proto, &gop); | |
404 | if (status != EFI_SUCCESS) | |
405 | continue; | |
406 | ||
38cb5ef4 MG |
407 | status = efi_call_phys3(sys_table->boottime->handle_protocol, |
408 | h, &conout_proto, &dummy); | |
409 | ||
410 | if (status == EFI_SUCCESS) | |
411 | conout_found = true; | |
291f3632 MF |
412 | |
413 | status = efi_call_phys4(gop->query_mode, gop, | |
414 | gop->mode->mode, &size, &info); | |
38cb5ef4 | 415 | if (status == EFI_SUCCESS && (!first_gop || conout_found)) { |
291f3632 | 416 | /* |
38cb5ef4 MG |
417 | * Systems that use the UEFI Console Splitter may |
418 | * provide multiple GOP devices, not all of which are | |
419 | * backed by real hardware. The workaround is to search | |
420 | * for a GOP implementing the ConOut protocol, and if | |
421 | * one isn't found, to just fall back to the first GOP. | |
291f3632 MF |
422 | */ |
423 | width = info->horizontal_resolution; | |
424 | height = info->vertical_resolution; | |
425 | fb_base = gop->mode->frame_buffer_base; | |
426 | fb_size = gop->mode->frame_buffer_size; | |
427 | pixel_format = info->pixel_format; | |
428 | pixel_info = info->pixel_information; | |
429 | pixels_per_scan_line = info->pixels_per_scan_line; | |
430 | ||
431 | /* | |
38cb5ef4 | 432 | * Once we've found a GOP supporting ConOut, |
291f3632 MF |
433 | * don't bother looking any further. |
434 | */ | |
38cb5ef4 | 435 | if (conout_found) |
291f3632 MF |
436 | break; |
437 | ||
438 | first_gop = gop; | |
439 | } | |
440 | } | |
441 | ||
442 | /* Did we find any GOPs? */ | |
443 | if (!first_gop) | |
444 | goto free_handle; | |
445 | ||
446 | /* EFI framebuffer */ | |
447 | si->orig_video_isVGA = VIDEO_TYPE_EFI; | |
448 | ||
449 | si->lfb_width = width; | |
450 | si->lfb_height = height; | |
451 | si->lfb_base = fb_base; | |
291f3632 MF |
452 | si->pages = 1; |
453 | ||
454 | if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) { | |
455 | si->lfb_depth = 32; | |
456 | si->lfb_linelength = pixels_per_scan_line * 4; | |
457 | si->red_size = 8; | |
458 | si->red_pos = 0; | |
459 | si->green_size = 8; | |
460 | si->green_pos = 8; | |
461 | si->blue_size = 8; | |
462 | si->blue_pos = 16; | |
463 | si->rsvd_size = 8; | |
464 | si->rsvd_pos = 24; | |
465 | } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) { | |
466 | si->lfb_depth = 32; | |
467 | si->lfb_linelength = pixels_per_scan_line * 4; | |
468 | si->red_size = 8; | |
469 | si->red_pos = 16; | |
470 | si->green_size = 8; | |
471 | si->green_pos = 8; | |
472 | si->blue_size = 8; | |
473 | si->blue_pos = 0; | |
474 | si->rsvd_size = 8; | |
475 | si->rsvd_pos = 24; | |
476 | } else if (pixel_format == PIXEL_BIT_MASK) { | |
477 | find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size); | |
478 | find_bits(pixel_info.green_mask, &si->green_pos, | |
479 | &si->green_size); | |
480 | find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size); | |
481 | find_bits(pixel_info.reserved_mask, &si->rsvd_pos, | |
482 | &si->rsvd_size); | |
483 | si->lfb_depth = si->red_size + si->green_size + | |
484 | si->blue_size + si->rsvd_size; | |
485 | si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8; | |
486 | } else { | |
487 | si->lfb_depth = 4; | |
488 | si->lfb_linelength = si->lfb_width / 2; | |
489 | si->red_size = 0; | |
490 | si->red_pos = 0; | |
491 | si->green_size = 0; | |
492 | si->green_pos = 0; | |
493 | si->blue_size = 0; | |
494 | si->blue_pos = 0; | |
495 | si->rsvd_size = 0; | |
496 | si->rsvd_pos = 0; | |
497 | } | |
498 | ||
e9b10953 MG |
499 | si->lfb_size = si->lfb_linelength * si->lfb_height; |
500 | ||
f462ed93 MG |
501 | si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS; |
502 | ||
291f3632 MF |
503 | free_handle: |
504 | efi_call_phys1(sys_table->boottime->free_pool, gop_handle); | |
505 | return status; | |
506 | } | |
507 | ||
508 | /* | |
509 | * See if we have Universal Graphics Adapter (UGA) protocol | |
510 | */ | |
511 | static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto, | |
512 | unsigned long size) | |
513 | { | |
514 | struct efi_uga_draw_protocol *uga, *first_uga; | |
515 | unsigned long nr_ugas; | |
516 | efi_status_t status; | |
517 | u32 width, height; | |
518 | void **uga_handle = NULL; | |
519 | int i; | |
520 | ||
521 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
522 | EFI_LOADER_DATA, size, &uga_handle); | |
523 | if (status != EFI_SUCCESS) | |
524 | return status; | |
525 | ||
526 | status = efi_call_phys5(sys_table->boottime->locate_handle, | |
527 | EFI_LOCATE_BY_PROTOCOL, uga_proto, | |
528 | NULL, &size, uga_handle); | |
529 | if (status != EFI_SUCCESS) | |
530 | goto free_handle; | |
531 | ||
532 | first_uga = NULL; | |
533 | ||
534 | nr_ugas = size / sizeof(void *); | |
535 | for (i = 0; i < nr_ugas; i++) { | |
536 | efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; | |
537 | void *handle = uga_handle[i]; | |
538 | u32 w, h, depth, refresh; | |
539 | void *pciio; | |
540 | ||
541 | status = efi_call_phys3(sys_table->boottime->handle_protocol, | |
542 | handle, uga_proto, &uga); | |
543 | if (status != EFI_SUCCESS) | |
544 | continue; | |
545 | ||
546 | efi_call_phys3(sys_table->boottime->handle_protocol, | |
547 | handle, &pciio_proto, &pciio); | |
548 | ||
549 | status = efi_call_phys5(uga->get_mode, uga, &w, &h, | |
550 | &depth, &refresh); | |
551 | if (status == EFI_SUCCESS && (!first_uga || pciio)) { | |
552 | width = w; | |
553 | height = h; | |
554 | ||
555 | /* | |
556 | * Once we've found a UGA supporting PCIIO, | |
557 | * don't bother looking any further. | |
558 | */ | |
559 | if (pciio) | |
560 | break; | |
561 | ||
562 | first_uga = uga; | |
563 | } | |
564 | } | |
565 | ||
566 | if (!first_uga) | |
567 | goto free_handle; | |
568 | ||
569 | /* EFI framebuffer */ | |
570 | si->orig_video_isVGA = VIDEO_TYPE_EFI; | |
571 | ||
572 | si->lfb_depth = 32; | |
573 | si->lfb_width = width; | |
574 | si->lfb_height = height; | |
575 | ||
576 | si->red_size = 8; | |
577 | si->red_pos = 16; | |
578 | si->green_size = 8; | |
579 | si->green_pos = 8; | |
580 | si->blue_size = 8; | |
581 | si->blue_pos = 0; | |
582 | si->rsvd_size = 8; | |
583 | si->rsvd_pos = 24; | |
584 | ||
585 | ||
586 | free_handle: | |
587 | efi_call_phys1(sys_table->boottime->free_pool, uga_handle); | |
588 | return status; | |
589 | } | |
590 | ||
591 | void setup_graphics(struct boot_params *boot_params) | |
592 | { | |
593 | efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; | |
594 | struct screen_info *si; | |
595 | efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; | |
596 | efi_status_t status; | |
597 | unsigned long size; | |
598 | void **gop_handle = NULL; | |
599 | void **uga_handle = NULL; | |
600 | ||
601 | si = &boot_params->screen_info; | |
602 | memset(si, 0, sizeof(*si)); | |
603 | ||
604 | size = 0; | |
605 | status = efi_call_phys5(sys_table->boottime->locate_handle, | |
606 | EFI_LOCATE_BY_PROTOCOL, &graphics_proto, | |
607 | NULL, &size, gop_handle); | |
608 | if (status == EFI_BUFFER_TOO_SMALL) | |
609 | status = setup_gop(si, &graphics_proto, size); | |
610 | ||
611 | if (status != EFI_SUCCESS) { | |
612 | size = 0; | |
613 | status = efi_call_phys5(sys_table->boottime->locate_handle, | |
614 | EFI_LOCATE_BY_PROTOCOL, &uga_proto, | |
615 | NULL, &size, uga_handle); | |
616 | if (status == EFI_BUFFER_TOO_SMALL) | |
617 | setup_uga(si, &uga_proto, size); | |
618 | } | |
619 | } | |
620 | ||
621 | struct initrd { | |
622 | efi_file_handle_t *handle; | |
623 | u64 size; | |
624 | }; | |
625 | ||
626 | /* | |
627 | * Check the cmdline for a LILO-style initrd= arguments. | |
628 | * | |
629 | * We only support loading an initrd from the same filesystem as the | |
630 | * kernel image. | |
631 | */ | |
632 | static efi_status_t handle_ramdisks(efi_loaded_image_t *image, | |
633 | struct setup_header *hdr) | |
634 | { | |
635 | struct initrd *initrds; | |
636 | unsigned long initrd_addr; | |
637 | efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID; | |
638 | u64 initrd_total; | |
639 | efi_file_io_interface_t *io; | |
640 | efi_file_handle_t *fh; | |
641 | efi_status_t status; | |
642 | int nr_initrds; | |
643 | char *str; | |
644 | int i, j, k; | |
645 | ||
646 | initrd_addr = 0; | |
647 | initrd_total = 0; | |
648 | ||
649 | str = (char *)(unsigned long)hdr->cmd_line_ptr; | |
650 | ||
651 | j = 0; /* See close_handles */ | |
652 | ||
653 | if (!str || !*str) | |
654 | return EFI_SUCCESS; | |
655 | ||
656 | for (nr_initrds = 0; *str; nr_initrds++) { | |
657 | str = strstr(str, "initrd="); | |
658 | if (!str) | |
659 | break; | |
660 | ||
661 | str += 7; | |
662 | ||
663 | /* Skip any leading slashes */ | |
664 | while (*str == '/' || *str == '\\') | |
665 | str++; | |
666 | ||
667 | while (*str && *str != ' ' && *str != '\n') | |
668 | str++; | |
669 | } | |
670 | ||
671 | if (!nr_initrds) | |
672 | return EFI_SUCCESS; | |
673 | ||
674 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
675 | EFI_LOADER_DATA, | |
676 | nr_initrds * sizeof(*initrds), | |
677 | &initrds); | |
9fa7deda MF |
678 | if (status != EFI_SUCCESS) { |
679 | efi_printk("Failed to alloc mem for initrds\n"); | |
291f3632 | 680 | goto fail; |
9fa7deda | 681 | } |
291f3632 MF |
682 | |
683 | str = (char *)(unsigned long)hdr->cmd_line_ptr; | |
684 | for (i = 0; i < nr_initrds; i++) { | |
685 | struct initrd *initrd; | |
686 | efi_file_handle_t *h; | |
687 | efi_file_info_t *info; | |
c7b73835 | 688 | efi_char16_t filename_16[256]; |
291f3632 MF |
689 | unsigned long info_sz; |
690 | efi_guid_t info_guid = EFI_FILE_INFO_ID; | |
691 | efi_char16_t *p; | |
692 | u64 file_sz; | |
693 | ||
694 | str = strstr(str, "initrd="); | |
695 | if (!str) | |
696 | break; | |
697 | ||
698 | str += 7; | |
699 | ||
700 | initrd = &initrds[i]; | |
c7b73835 | 701 | p = filename_16; |
291f3632 MF |
702 | |
703 | /* Skip any leading slashes */ | |
704 | while (*str == '/' || *str == '\\') | |
705 | str++; | |
706 | ||
707 | while (*str && *str != ' ' && *str != '\n') { | |
c7b73835 | 708 | if ((u8 *)p >= (u8 *)filename_16 + sizeof(filename_16)) |
291f3632 MF |
709 | break; |
710 | ||
711 | *p++ = *str++; | |
712 | } | |
713 | ||
714 | *p = '\0'; | |
715 | ||
716 | /* Only open the volume once. */ | |
717 | if (!i) { | |
718 | efi_boot_services_t *boottime; | |
719 | ||
720 | boottime = sys_table->boottime; | |
721 | ||
722 | status = efi_call_phys3(boottime->handle_protocol, | |
723 | image->device_handle, &fs_proto, &io); | |
9fa7deda MF |
724 | if (status != EFI_SUCCESS) { |
725 | efi_printk("Failed to handle fs_proto\n"); | |
291f3632 | 726 | goto free_initrds; |
9fa7deda | 727 | } |
291f3632 MF |
728 | |
729 | status = efi_call_phys2(io->open_volume, io, &fh); | |
9fa7deda MF |
730 | if (status != EFI_SUCCESS) { |
731 | efi_printk("Failed to open volume\n"); | |
291f3632 | 732 | goto free_initrds; |
9fa7deda | 733 | } |
291f3632 MF |
734 | } |
735 | ||
c7b73835 | 736 | status = efi_call_phys5(fh->open, fh, &h, filename_16, |
291f3632 | 737 | EFI_FILE_MODE_READ, (u64)0); |
9fa7deda MF |
738 | if (status != EFI_SUCCESS) { |
739 | efi_printk("Failed to open initrd file\n"); | |
291f3632 | 740 | goto close_handles; |
9fa7deda | 741 | } |
291f3632 MF |
742 | |
743 | initrd->handle = h; | |
744 | ||
745 | info_sz = 0; | |
746 | status = efi_call_phys4(h->get_info, h, &info_guid, | |
747 | &info_sz, NULL); | |
9fa7deda MF |
748 | if (status != EFI_BUFFER_TOO_SMALL) { |
749 | efi_printk("Failed to get initrd info size\n"); | |
291f3632 | 750 | goto close_handles; |
9fa7deda | 751 | } |
291f3632 MF |
752 | |
753 | grow: | |
754 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
755 | EFI_LOADER_DATA, info_sz, &info); | |
9fa7deda MF |
756 | if (status != EFI_SUCCESS) { |
757 | efi_printk("Failed to alloc mem for initrd info\n"); | |
291f3632 | 758 | goto close_handles; |
9fa7deda | 759 | } |
291f3632 MF |
760 | |
761 | status = efi_call_phys4(h->get_info, h, &info_guid, | |
762 | &info_sz, info); | |
763 | if (status == EFI_BUFFER_TOO_SMALL) { | |
764 | efi_call_phys1(sys_table->boottime->free_pool, info); | |
765 | goto grow; | |
766 | } | |
767 | ||
768 | file_sz = info->file_size; | |
769 | efi_call_phys1(sys_table->boottime->free_pool, info); | |
770 | ||
9fa7deda MF |
771 | if (status != EFI_SUCCESS) { |
772 | efi_printk("Failed to get initrd info\n"); | |
291f3632 | 773 | goto close_handles; |
9fa7deda | 774 | } |
291f3632 MF |
775 | |
776 | initrd->size = file_sz; | |
777 | initrd_total += file_sz; | |
778 | } | |
779 | ||
780 | if (initrd_total) { | |
781 | unsigned long addr; | |
782 | ||
783 | /* | |
784 | * Multiple initrd's need to be at consecutive | |
785 | * addresses in memory, so allocate enough memory for | |
786 | * all the initrd's. | |
787 | */ | |
788 | status = high_alloc(initrd_total, 0x1000, | |
789 | &initrd_addr, hdr->initrd_addr_max); | |
9fa7deda MF |
790 | if (status != EFI_SUCCESS) { |
791 | efi_printk("Failed to alloc highmem for initrds\n"); | |
291f3632 | 792 | goto close_handles; |
9fa7deda | 793 | } |
291f3632 MF |
794 | |
795 | /* We've run out of free low memory. */ | |
796 | if (initrd_addr > hdr->initrd_addr_max) { | |
9fa7deda | 797 | efi_printk("We've run out of free low memory\n"); |
291f3632 MF |
798 | status = EFI_INVALID_PARAMETER; |
799 | goto free_initrd_total; | |
800 | } | |
801 | ||
802 | addr = initrd_addr; | |
803 | for (j = 0; j < nr_initrds; j++) { | |
804 | u64 size; | |
805 | ||
806 | size = initrds[j].size; | |
2d2da60f ML |
807 | while (size) { |
808 | u64 chunksize; | |
809 | if (size > EFI_READ_CHUNK_SIZE) | |
810 | chunksize = EFI_READ_CHUNK_SIZE; | |
811 | else | |
812 | chunksize = size; | |
813 | status = efi_call_phys3(fh->read, | |
814 | initrds[j].handle, | |
815 | &chunksize, addr); | |
9fa7deda MF |
816 | if (status != EFI_SUCCESS) { |
817 | efi_printk("Failed to read initrd\n"); | |
2d2da60f | 818 | goto free_initrd_total; |
9fa7deda | 819 | } |
2d2da60f ML |
820 | addr += chunksize; |
821 | size -= chunksize; | |
822 | } | |
291f3632 MF |
823 | |
824 | efi_call_phys1(fh->close, initrds[j].handle); | |
291f3632 MF |
825 | } |
826 | ||
827 | } | |
828 | ||
829 | efi_call_phys1(sys_table->boottime->free_pool, initrds); | |
830 | ||
831 | hdr->ramdisk_image = initrd_addr; | |
832 | hdr->ramdisk_size = initrd_total; | |
833 | ||
834 | return status; | |
835 | ||
836 | free_initrd_total: | |
837 | low_free(initrd_total, initrd_addr); | |
838 | ||
839 | close_handles: | |
30dc0d0f | 840 | for (k = j; k < i; k++) |
291f3632 MF |
841 | efi_call_phys1(fh->close, initrds[k].handle); |
842 | free_initrds: | |
843 | efi_call_phys1(sys_table->boottime->free_pool, initrds); | |
844 | fail: | |
845 | hdr->ramdisk_image = 0; | |
846 | hdr->ramdisk_size = 0; | |
847 | ||
848 | return status; | |
849 | } | |
850 | ||
851 | /* | |
852 | * Because the x86 boot code expects to be passed a boot_params we | |
853 | * need to create one ourselves (usually the bootloader would create | |
854 | * one for us). | |
855 | */ | |
9ca8f72a | 856 | struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) |
291f3632 | 857 | { |
9ca8f72a MF |
858 | struct boot_params *boot_params; |
859 | struct sys_desc_table *sdt; | |
860 | struct apm_bios_info *bi; | |
861 | struct setup_header *hdr; | |
862 | struct efi_info *efi; | |
863 | efi_loaded_image_t *image; | |
864 | void *options; | |
865 | u32 load_options_size; | |
866 | efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; | |
291f3632 MF |
867 | int options_size = 0; |
868 | efi_status_t status; | |
291f3632 | 869 | unsigned long cmdline; |
291f3632 MF |
870 | u16 *s2; |
871 | u8 *s1; | |
872 | int i; | |
873 | ||
9ca8f72a MF |
874 | sys_table = _table; |
875 | ||
876 | /* Check if we were booted by the EFI firmware */ | |
877 | if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) | |
878 | return NULL; | |
879 | ||
880 | status = efi_call_phys3(sys_table->boottime->handle_protocol, | |
881 | handle, &proto, (void *)&image); | |
882 | if (status != EFI_SUCCESS) { | |
883 | efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); | |
884 | return NULL; | |
885 | } | |
886 | ||
887 | status = low_alloc(0x4000, 1, (unsigned long *)&boot_params); | |
888 | if (status != EFI_SUCCESS) { | |
889 | efi_printk("Failed to alloc lowmem for boot params\n"); | |
890 | return NULL; | |
891 | } | |
892 | ||
893 | memset(boot_params, 0x0, 0x4000); | |
894 | ||
895 | hdr = &boot_params->hdr; | |
896 | efi = &boot_params->efi_info; | |
897 | bi = &boot_params->apm_bios_info; | |
898 | sdt = &boot_params->sys_desc_table; | |
899 | ||
900 | /* Copy the second sector to boot_params */ | |
901 | memcpy(&hdr->jump, image->image_base + 512, 512); | |
902 | ||
903 | /* | |
904 | * Fill out some of the header fields ourselves because the | |
905 | * EFI firmware loader doesn't load the first sector. | |
906 | */ | |
907 | hdr->root_flags = 1; | |
908 | hdr->vid_mode = 0xffff; | |
909 | hdr->boot_flag = 0xAA55; | |
910 | ||
911 | hdr->code32_start = (__u64)(unsigned long)image->image_base; | |
912 | ||
291f3632 MF |
913 | hdr->type_of_loader = 0x21; |
914 | ||
915 | /* Convert unicode cmdline to ascii */ | |
9ca8f72a MF |
916 | options = image->load_options; |
917 | load_options_size = image->load_options_size / 2; /* ASCII */ | |
291f3632 MF |
918 | cmdline = 0; |
919 | s2 = (u16 *)options; | |
920 | ||
921 | if (s2) { | |
922 | while (*s2 && *s2 != '\n' && options_size < load_options_size) { | |
923 | s2++; | |
924 | options_size++; | |
925 | } | |
926 | ||
927 | if (options_size) { | |
928 | if (options_size > hdr->cmdline_size) | |
929 | options_size = hdr->cmdline_size; | |
930 | ||
931 | options_size++; /* NUL termination */ | |
932 | ||
933 | status = low_alloc(options_size, 1, &cmdline); | |
9fa7deda MF |
934 | if (status != EFI_SUCCESS) { |
935 | efi_printk("Failed to alloc mem for cmdline\n"); | |
291f3632 | 936 | goto fail; |
9fa7deda | 937 | } |
291f3632 MF |
938 | |
939 | s1 = (u8 *)(unsigned long)cmdline; | |
940 | s2 = (u16 *)options; | |
941 | ||
942 | for (i = 0; i < options_size - 1; i++) | |
943 | *s1++ = *s2++; | |
944 | ||
945 | *s1 = '\0'; | |
946 | } | |
947 | } | |
948 | ||
949 | hdr->cmd_line_ptr = cmdline; | |
950 | ||
951 | hdr->ramdisk_image = 0; | |
952 | hdr->ramdisk_size = 0; | |
953 | ||
291f3632 MF |
954 | /* Clear APM BIOS info */ |
955 | memset(bi, 0, sizeof(*bi)); | |
956 | ||
957 | memset(sdt, 0, sizeof(*sdt)); | |
958 | ||
9ca8f72a MF |
959 | status = handle_ramdisks(image, hdr); |
960 | if (status != EFI_SUCCESS) | |
961 | goto fail2; | |
962 | ||
963 | return boot_params; | |
964 | fail2: | |
965 | if (options_size) | |
966 | low_free(options_size, hdr->cmd_line_ptr); | |
967 | fail: | |
968 | low_free(0x4000, (unsigned long)boot_params); | |
969 | return NULL; | |
970 | } | |
971 | ||
972 | static efi_status_t exit_boot(struct boot_params *boot_params, | |
973 | void *handle) | |
974 | { | |
975 | struct efi_info *efi = &boot_params->efi_info; | |
976 | struct e820entry *e820_map = &boot_params->e820_map[0]; | |
977 | struct e820entry *prev = NULL; | |
978 | unsigned long size, key, desc_size, _size; | |
979 | efi_memory_desc_t *mem_map; | |
980 | efi_status_t status; | |
981 | __u32 desc_version; | |
982 | u8 nr_entries; | |
983 | int i; | |
291f3632 MF |
984 | |
985 | size = sizeof(*mem_map) * 32; | |
986 | ||
987 | again: | |
988 | size += sizeof(*mem_map); | |
989 | _size = size; | |
990 | status = low_alloc(size, 1, (unsigned long *)&mem_map); | |
991 | if (status != EFI_SUCCESS) | |
9ca8f72a | 992 | return status; |
291f3632 MF |
993 | |
994 | status = efi_call_phys5(sys_table->boottime->get_memory_map, &size, | |
995 | mem_map, &key, &desc_size, &desc_version); | |
996 | if (status == EFI_BUFFER_TOO_SMALL) { | |
997 | low_free(_size, (unsigned long)mem_map); | |
998 | goto again; | |
999 | } | |
1000 | ||
1001 | if (status != EFI_SUCCESS) | |
1002 | goto free_mem_map; | |
1003 | ||
9ca8f72a | 1004 | memcpy(&efi->efi_loader_signature, EFI_LOADER_SIGNATURE, sizeof(__u32)); |
291f3632 MF |
1005 | efi->efi_systab = (unsigned long)sys_table; |
1006 | efi->efi_memdesc_size = desc_size; | |
1007 | efi->efi_memdesc_version = desc_version; | |
1008 | efi->efi_memmap = (unsigned long)mem_map; | |
1009 | efi->efi_memmap_size = size; | |
1010 | ||
1011 | #ifdef CONFIG_X86_64 | |
1012 | efi->efi_systab_hi = (unsigned long)sys_table >> 32; | |
1013 | efi->efi_memmap_hi = (unsigned long)mem_map >> 32; | |
1014 | #endif | |
1015 | ||
1016 | /* Might as well exit boot services now */ | |
1017 | status = efi_call_phys2(sys_table->boottime->exit_boot_services, | |
1018 | handle, key); | |
1019 | if (status != EFI_SUCCESS) | |
1020 | goto free_mem_map; | |
1021 | ||
1022 | /* Historic? */ | |
1023 | boot_params->alt_mem_k = 32 * 1024; | |
1024 | ||
1025 | /* | |
1026 | * Convert the EFI memory map to E820. | |
1027 | */ | |
1028 | nr_entries = 0; | |
1029 | for (i = 0; i < size / desc_size; i++) { | |
1030 | efi_memory_desc_t *d; | |
1031 | unsigned int e820_type = 0; | |
1032 | unsigned long m = (unsigned long)mem_map; | |
1033 | ||
1034 | d = (efi_memory_desc_t *)(m + (i * desc_size)); | |
1035 | switch (d->type) { | |
1036 | case EFI_RESERVED_TYPE: | |
1037 | case EFI_RUNTIME_SERVICES_CODE: | |
1038 | case EFI_RUNTIME_SERVICES_DATA: | |
1039 | case EFI_MEMORY_MAPPED_IO: | |
1040 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1041 | case EFI_PAL_CODE: | |
1042 | e820_type = E820_RESERVED; | |
1043 | break; | |
1044 | ||
1045 | case EFI_UNUSABLE_MEMORY: | |
1046 | e820_type = E820_UNUSABLE; | |
1047 | break; | |
1048 | ||
1049 | case EFI_ACPI_RECLAIM_MEMORY: | |
1050 | e820_type = E820_ACPI; | |
1051 | break; | |
1052 | ||
1053 | case EFI_LOADER_CODE: | |
1054 | case EFI_LOADER_DATA: | |
1055 | case EFI_BOOT_SERVICES_CODE: | |
1056 | case EFI_BOOT_SERVICES_DATA: | |
1057 | case EFI_CONVENTIONAL_MEMORY: | |
1058 | e820_type = E820_RAM; | |
1059 | break; | |
1060 | ||
1061 | case EFI_ACPI_MEMORY_NVS: | |
1062 | e820_type = E820_NVS; | |
1063 | break; | |
1064 | ||
1065 | default: | |
1066 | continue; | |
1067 | } | |
1068 | ||
1069 | /* Merge adjacent mappings */ | |
1070 | if (prev && prev->type == e820_type && | |
1071 | (prev->addr + prev->size) == d->phys_addr) | |
1072 | prev->size += d->num_pages << 12; | |
1073 | else { | |
1074 | e820_map->addr = d->phys_addr; | |
1075 | e820_map->size = d->num_pages << 12; | |
1076 | e820_map->type = e820_type; | |
1077 | prev = e820_map++; | |
1078 | nr_entries++; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | boot_params->e820_entries = nr_entries; | |
1083 | ||
1084 | return EFI_SUCCESS; | |
1085 | ||
1086 | free_mem_map: | |
1087 | low_free(_size, (unsigned long)mem_map); | |
291f3632 MF |
1088 | return status; |
1089 | } | |
1090 | ||
9ca8f72a | 1091 | static efi_status_t relocate_kernel(struct setup_header *hdr) |
291f3632 | 1092 | { |
291f3632 | 1093 | unsigned long start, nr_pages; |
291f3632 | 1094 | efi_status_t status; |
e31be363 | 1095 | |
291f3632 MF |
1096 | /* |
1097 | * The EFI firmware loader could have placed the kernel image | |
1098 | * anywhere in memory, but the kernel has various restrictions | |
1099 | * on the max physical address it can run at. Attempt to move | |
1100 | * the kernel to boot_params.pref_address, or as low as | |
1101 | * possible. | |
1102 | */ | |
1103 | start = hdr->pref_address; | |
1104 | nr_pages = round_up(hdr->init_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE; | |
1105 | ||
1106 | status = efi_call_phys4(sys_table->boottime->allocate_pages, | |
1107 | EFI_ALLOCATE_ADDRESS, EFI_LOADER_DATA, | |
1108 | nr_pages, &start); | |
1109 | if (status != EFI_SUCCESS) { | |
1110 | status = low_alloc(hdr->init_size, hdr->kernel_alignment, | |
1111 | &start); | |
9ca8f72a | 1112 | if (status != EFI_SUCCESS) |
9fa7deda | 1113 | efi_printk("Failed to alloc mem for kernel\n"); |
291f3632 MF |
1114 | } |
1115 | ||
9ca8f72a MF |
1116 | if (status == EFI_SUCCESS) |
1117 | memcpy((void *)start, (void *)(unsigned long)hdr->code32_start, | |
1118 | hdr->init_size); | |
1119 | ||
1120 | hdr->pref_address = hdr->code32_start; | |
291f3632 | 1121 | hdr->code32_start = (__u32)start; |
291f3632 | 1122 | |
9ca8f72a MF |
1123 | return status; |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * On success we return a pointer to a boot_params structure, and NULL | |
1128 | * on failure. | |
1129 | */ | |
1130 | struct boot_params *efi_main(void *handle, efi_system_table_t *_table, | |
1131 | struct boot_params *boot_params) | |
1132 | { | |
1133 | struct desc_ptr *gdt, *idt; | |
1134 | efi_loaded_image_t *image; | |
1135 | struct setup_header *hdr = &boot_params->hdr; | |
1136 | efi_status_t status; | |
1137 | struct desc_struct *desc; | |
1138 | ||
1139 | sys_table = _table; | |
1140 | ||
1141 | /* Check if we were booted by the EFI firmware */ | |
1142 | if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) | |
1143 | goto fail; | |
1144 | ||
1145 | setup_graphics(boot_params); | |
291f3632 | 1146 | |
dd5fc854 MG |
1147 | setup_efi_pci(boot_params); |
1148 | ||
291f3632 MF |
1149 | status = efi_call_phys3(sys_table->boottime->allocate_pool, |
1150 | EFI_LOADER_DATA, sizeof(*gdt), | |
1151 | (void **)&gdt); | |
9fa7deda MF |
1152 | if (status != EFI_SUCCESS) { |
1153 | efi_printk("Failed to alloc mem for gdt structure\n"); | |
291f3632 | 1154 | goto fail; |
9fa7deda | 1155 | } |
291f3632 MF |
1156 | |
1157 | gdt->size = 0x800; | |
1158 | status = low_alloc(gdt->size, 8, (unsigned long *)&gdt->address); | |
9fa7deda MF |
1159 | if (status != EFI_SUCCESS) { |
1160 | efi_printk("Failed to alloc mem for gdt\n"); | |
291f3632 | 1161 | goto fail; |
9fa7deda | 1162 | } |
291f3632 MF |
1163 | |
1164 | status = efi_call_phys3(sys_table->boottime->allocate_pool, | |
1165 | EFI_LOADER_DATA, sizeof(*idt), | |
1166 | (void **)&idt); | |
9fa7deda MF |
1167 | if (status != EFI_SUCCESS) { |
1168 | efi_printk("Failed to alloc mem for idt structure\n"); | |
291f3632 | 1169 | goto fail; |
9fa7deda | 1170 | } |
291f3632 MF |
1171 | |
1172 | idt->size = 0; | |
1173 | idt->address = 0; | |
1174 | ||
9ca8f72a MF |
1175 | /* |
1176 | * If the kernel isn't already loaded at the preferred load | |
1177 | * address, relocate it. | |
1178 | */ | |
1179 | if (hdr->pref_address != hdr->code32_start) { | |
1180 | status = relocate_kernel(hdr); | |
1181 | ||
1182 | if (status != EFI_SUCCESS) | |
1183 | goto fail; | |
1184 | } | |
1185 | ||
1186 | status = exit_boot(boot_params, handle); | |
291f3632 MF |
1187 | if (status != EFI_SUCCESS) |
1188 | goto fail; | |
1189 | ||
1190 | memset((char *)gdt->address, 0x0, gdt->size); | |
1191 | desc = (struct desc_struct *)gdt->address; | |
1192 | ||
1193 | /* The first GDT is a dummy and the second is unused. */ | |
1194 | desc += 2; | |
1195 | ||
1196 | desc->limit0 = 0xffff; | |
1197 | desc->base0 = 0x0000; | |
1198 | desc->base1 = 0x0000; | |
1199 | desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ; | |
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 | desc++; | |
1211 | desc->limit0 = 0xffff; | |
1212 | desc->base0 = 0x0000; | |
1213 | desc->base1 = 0x0000; | |
1214 | desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE; | |
1215 | desc->s = DESC_TYPE_CODE_DATA; | |
1216 | desc->dpl = 0; | |
1217 | desc->p = 1; | |
1218 | desc->limit = 0xf; | |
1219 | desc->avl = 0; | |
1220 | desc->l = 0; | |
1221 | desc->d = SEG_OP_SIZE_32BIT; | |
1222 | desc->g = SEG_GRANULARITY_4KB; | |
1223 | desc->base2 = 0x00; | |
1224 | ||
1225 | #ifdef CONFIG_X86_64 | |
1226 | /* Task segment value */ | |
1227 | desc++; | |
1228 | desc->limit0 = 0x0000; | |
1229 | desc->base0 = 0x0000; | |
1230 | desc->base1 = 0x0000; | |
1231 | desc->type = SEG_TYPE_TSS; | |
1232 | desc->s = 0; | |
1233 | desc->dpl = 0; | |
1234 | desc->p = 1; | |
1235 | desc->limit = 0x0; | |
1236 | desc->avl = 0; | |
1237 | desc->l = 0; | |
1238 | desc->d = 0; | |
1239 | desc->g = SEG_GRANULARITY_4KB; | |
1240 | desc->base2 = 0x00; | |
1241 | #endif /* CONFIG_X86_64 */ | |
1242 | ||
1243 | asm volatile ("lidt %0" : : "m" (*idt)); | |
1244 | asm volatile ("lgdt %0" : : "m" (*gdt)); | |
1245 | ||
1246 | asm volatile("cli"); | |
1247 | ||
1248 | return boot_params; | |
1249 | fail: | |
1250 | return NULL; | |
1251 | } |