1 /* -----------------------------------------------------------------------
3 * Copyright 2011 Intel Corporation; author Matt Fleming
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.
8 * ----------------------------------------------------------------------- */
10 #include <linux/efi.h>
11 #include <linux/pci.h>
13 #include <asm/setup.h>
16 #undef memcpy /* Use memcpy from misc.c */
20 static efi_system_table_t *sys_table;
22 struct efi_config *efi_early;
24 #define BOOT_SERVICES(bits) \
25 static void setup_boot_services##bits(struct efi_config *c) \
27 efi_system_table_##bits##_t *table; \
28 efi_boot_services_##bits##_t *bt; \
30 table = (typeof(table))sys_table; \
32 c->text_output = table->con_out; \
34 bt = (typeof(bt))(unsigned long)(table->boottime); \
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; \
48 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
51 __file_size32(void *__fh, efi_char16_t *filename_16,
52 void **handle, u64 *file_sz)
54 efi_file_handle_32_t *h, *fh = __fh;
55 efi_file_info_t *info;
57 efi_guid_t info_guid = EFI_FILE_INFO_ID;
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");
72 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
74 if (status != EFI_BUFFER_TOO_SMALL) {
75 efi_printk(sys_table, "Failed to get file info size\n");
80 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
81 info_sz, (void **)&info);
82 if (status != EFI_SUCCESS) {
83 efi_printk(sys_table, "Failed to alloc mem for file info\n");
87 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
89 if (status == EFI_BUFFER_TOO_SMALL) {
90 efi_call_early(free_pool, info);
94 *file_sz = info->file_size;
95 efi_call_early(free_pool, info);
97 if (status != EFI_SUCCESS)
98 efi_printk(sys_table, "Failed to get initrd info\n");
104 __file_size64(void *__fh, efi_char16_t *filename_16,
105 void **handle, u64 *file_sz)
107 efi_file_handle_64_t *h, *fh = __fh;
108 efi_file_info_t *info;
110 efi_guid_t info_guid = EFI_FILE_INFO_ID;
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");
125 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
127 if (status != EFI_BUFFER_TOO_SMALL) {
128 efi_printk(sys_table, "Failed to get file info size\n");
133 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
134 info_sz, (void **)&info);
135 if (status != EFI_SUCCESS) {
136 efi_printk(sys_table, "Failed to alloc mem for file info\n");
140 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
142 if (status == EFI_BUFFER_TOO_SMALL) {
143 efi_call_early(free_pool, info);
147 *file_sz = info->file_size;
148 efi_call_early(free_pool, info);
150 if (status != EFI_SUCCESS)
151 efi_printk(sys_table, "Failed to get initrd info\n");
156 efi_file_size(efi_system_table_t *sys_table, void *__fh,
157 efi_char16_t *filename_16, void **handle, u64 *file_sz)
160 return __file_size64(__fh, filename_16, handle, file_sz);
162 return __file_size32(__fh, filename_16, handle, file_sz);
166 efi_file_read(void *handle, unsigned long *size, void *addr)
170 if (efi_early->is64) {
171 efi_file_handle_64_t *fh = handle;
173 func = (unsigned long)fh->read;
174 return efi_early->call(func, handle, size, addr);
176 efi_file_handle_32_t *fh = handle;
178 func = (unsigned long)fh->read;
179 return efi_early->call(func, handle, size, addr);
183 efi_status_t efi_file_close(void *handle)
185 if (efi_early->is64) {
186 efi_file_handle_64_t *fh = handle;
188 return efi_early->call((unsigned long)fh->close, handle);
190 efi_file_handle_32_t *fh = handle;
192 return efi_early->call((unsigned long)fh->close, handle);
196 static inline efi_status_t __open_volume32(void *__image, void **__fh)
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;
203 void *handle = (void *)(unsigned long)image->device_handle;
206 status = efi_call_early(handle_protocol, handle,
207 &fs_proto, (void **)&io);
208 if (status != EFI_SUCCESS) {
209 efi_printk(sys_table, "Failed to handle fs_proto\n");
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");
222 static inline efi_status_t __open_volume64(void *__image, void **__fh)
224 efi_file_io_interface_t *io;
225 efi_loaded_image_64_t *image = __image;
226 efi_file_handle_64_t *fh;
227 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
229 void *handle = (void *)(unsigned long)image->device_handle;
232 status = efi_call_early(handle_protocol, handle,
233 &fs_proto, (void **)&io);
234 if (status != EFI_SUCCESS) {
235 efi_printk(sys_table, "Failed to handle fs_proto\n");
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");
249 efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
252 return __open_volume64(__image, __fh);
254 return __open_volume32(__image, __fh);
257 void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
259 unsigned long output_string;
262 if (efi_early->is64) {
263 struct efi_simple_text_output_protocol_64 *out;
266 offset = offsetof(typeof(*out), output_string);
267 output_string = efi_early->text_output + offset;
268 func = (u64 *)output_string;
270 efi_early->call(*func, efi_early->text_output, str);
272 struct efi_simple_text_output_protocol_32 *out;
275 offset = offsetof(typeof(*out), output_string);
276 output_string = efi_early->text_output + offset;
277 func = (u32 *)output_string;
279 efi_early->call(*func, efi_early->text_output, str);
283 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
291 while (!(mask & 0x1)) {
307 __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
309 struct pci_setup_rom *rom = NULL;
314 status = efi_early->call(pci->attributes, pci,
315 EfiPciIoAttributeOperationGet, 0, 0,
317 if (status != EFI_SUCCESS)
320 if (!pci->romimage || !pci->romsize)
321 return EFI_INVALID_PARAMETER;
323 size = pci->romsize + sizeof(*rom);
325 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
326 if (status != EFI_SUCCESS)
329 memset(rom, 0, sizeof(*rom));
331 rom->data.type = SETUP_PCI;
332 rom->data.len = size - sizeof(struct setup_data);
334 rom->pcilen = pci->romsize;
337 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
338 PCI_VENDOR_ID, 1, &(rom->vendor));
340 if (status != EFI_SUCCESS)
343 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
344 PCI_DEVICE_ID, 1, &(rom->devid));
346 if (status != EFI_SUCCESS)
349 status = efi_early->call(pci->get_location, pci, &(rom->segment),
350 &(rom->bus), &(rom->device), &(rom->function));
352 if (status != EFI_SUCCESS)
355 memcpy(rom->romdata, pci->romimage, pci->romsize);
359 efi_call_early(free_pool, rom);
364 setup_efi_pci32(struct boot_params *params, void **pci_handle,
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;
371 unsigned long nr_pci;
372 struct setup_data *data;
375 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
377 while (data && data->next)
378 data = (struct setup_data *)(unsigned long)data->next;
380 nr_pci = size / sizeof(u32);
381 for (i = 0; i < nr_pci; i++) {
382 struct pci_setup_rom *rom = NULL;
385 status = efi_call_early(handle_protocol, h,
386 &pci_proto, (void **)&pci);
388 if (status != EFI_SUCCESS)
394 status = __setup_efi_pci32(pci, &rom);
395 if (status != EFI_SUCCESS)
399 data->next = (unsigned long)rom;
401 params->hdr.setup_data = (unsigned long)rom;
403 data = (struct setup_data *)rom;
411 __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
413 struct pci_setup_rom *rom;
418 status = efi_early->call(pci->attributes, pci,
419 EfiPciIoAttributeOperationGet, 0,
421 if (status != EFI_SUCCESS)
424 if (!pci->romimage || !pci->romsize)
425 return EFI_INVALID_PARAMETER;
427 size = pci->romsize + sizeof(*rom);
429 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
430 if (status != EFI_SUCCESS)
433 rom->data.type = SETUP_PCI;
434 rom->data.len = size - sizeof(struct setup_data);
436 rom->pcilen = pci->romsize;
439 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
440 PCI_VENDOR_ID, 1, &(rom->vendor));
442 if (status != EFI_SUCCESS)
445 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
446 PCI_DEVICE_ID, 1, &(rom->devid));
448 if (status != EFI_SUCCESS)
451 status = efi_early->call(pci->get_location, pci, &(rom->segment),
452 &(rom->bus), &(rom->device), &(rom->function));
454 if (status != EFI_SUCCESS)
457 memcpy(rom->romdata, pci->romimage, pci->romsize);
461 efi_call_early(free_pool, rom);
467 setup_efi_pci64(struct boot_params *params, void **pci_handle,
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;
474 unsigned long nr_pci;
475 struct setup_data *data;
478 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
480 while (data && data->next)
481 data = (struct setup_data *)(unsigned long)data->next;
483 nr_pci = size / sizeof(u64);
484 for (i = 0; i < nr_pci; i++) {
485 struct pci_setup_rom *rom = NULL;
488 status = efi_call_early(handle_protocol, h,
489 &pci_proto, (void **)&pci);
491 if (status != EFI_SUCCESS)
497 status = __setup_efi_pci64(pci, &rom);
498 if (status != EFI_SUCCESS)
502 data->next = (unsigned long)rom;
504 params->hdr.setup_data = (unsigned long)rom;
506 data = (struct setup_data *)rom;
513 static efi_status_t setup_efi_pci(struct boot_params *params)
516 void **pci_handle = NULL;
517 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
518 unsigned long size = 0;
520 status = efi_call_early(locate_handle,
521 EFI_LOCATE_BY_PROTOCOL,
522 &pci_proto, NULL, &size, pci_handle);
524 if (status == EFI_BUFFER_TOO_SMALL) {
525 status = efi_call_early(allocate_pool,
527 size, (void **)&pci_handle);
529 if (status != EFI_SUCCESS)
532 status = efi_call_early(locate_handle,
533 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
534 NULL, &size, pci_handle);
537 if (status != EFI_SUCCESS)
541 status = setup_efi_pci64(params, pci_handle, size);
543 status = setup_efi_pci32(params, pci_handle, size);
546 efi_call_early(free_pool, pci_handle);
551 setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
552 struct efi_pixel_bitmask pixel_info, int pixel_format)
554 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
556 si->lfb_linelength = pixels_per_scan_line * 4;
565 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
567 si->lfb_linelength = pixels_per_scan_line * 4;
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,
580 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
581 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
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;
588 si->lfb_linelength = si->lfb_width / 2;
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)
605 struct efi_graphics_output_protocol_mode_32 *mode;
610 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
612 status = efi_early->call(gop32->query_mode, gop32,
613 mode->mode, size, info);
614 if (status != EFI_SUCCESS)
617 *fb_base = mode->frame_buffer_base;
622 setup_gop32(struct screen_info *si, efi_guid_t *proto,
623 unsigned long size, void **gop_handle)
625 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
626 unsigned long nr_gops;
628 u32 pixels_per_scan_line;
630 struct efi_pixel_bitmask pixel_info;
633 u32 *handles = (u32 *)(unsigned long)gop_handle;
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;
647 status = efi_call_early(handle_protocol, h,
648 proto, (void **)&gop32);
649 if (status != EFI_SUCCESS)
652 status = efi_call_early(handle_protocol, h,
653 &conout_proto, &dummy);
654 if (status == EFI_SUCCESS)
657 status = __gop_query32(gop32, &info, &size, &fb_base);
658 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
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.
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;
673 * Once we've found a GOP supporting ConOut,
674 * don't bother looking any further.
682 /* Did we find any GOPs? */
686 /* EFI framebuffer */
687 si->orig_video_isVGA = VIDEO_TYPE_EFI;
689 si->lfb_width = width;
690 si->lfb_height = height;
691 si->lfb_base = fb_base;
694 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
696 si->lfb_size = si->lfb_linelength * si->lfb_height;
698 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
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)
708 struct efi_graphics_output_protocol_mode_64 *mode;
713 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
715 status = efi_early->call(gop64->query_mode, gop64,
716 mode->mode, size, info);
717 if (status != EFI_SUCCESS)
720 *fb_base = mode->frame_buffer_base;
725 setup_gop64(struct screen_info *si, efi_guid_t *proto,
726 unsigned long size, void **gop_handle)
728 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
729 unsigned long nr_gops;
731 u32 pixels_per_scan_line;
733 struct efi_pixel_bitmask pixel_info;
736 u64 *handles = (u64 *)(unsigned long)gop_handle;
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;
750 status = efi_call_early(handle_protocol, h,
751 proto, (void **)&gop64);
752 if (status != EFI_SUCCESS)
755 status = efi_call_early(handle_protocol, h,
756 &conout_proto, &dummy);
757 if (status == EFI_SUCCESS)
760 status = __gop_query64(gop64, &info, &size, &fb_base);
761 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
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.
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;
776 * Once we've found a GOP supporting ConOut,
777 * don't bother looking any further.
785 /* Did we find any GOPs? */
789 /* EFI framebuffer */
790 si->orig_video_isVGA = VIDEO_TYPE_EFI;
792 si->lfb_width = width;
793 si->lfb_height = height;
794 si->lfb_base = fb_base;
797 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
799 si->lfb_size = si->lfb_linelength * si->lfb_height;
801 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
807 * See if we have Graphics Output Protocol
809 static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
813 void **gop_handle = NULL;
815 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
816 size, (void **)&gop_handle);
817 if (status != EFI_SUCCESS)
820 status = efi_call_early(locate_handle,
821 EFI_LOCATE_BY_PROTOCOL,
822 proto, NULL, &size, gop_handle);
823 if (status != EFI_SUCCESS)
827 status = setup_gop64(si, proto, size, gop_handle);
829 status = setup_gop32(si, proto, size, gop_handle);
832 efi_call_early(free_pool, gop_handle);
837 setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
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;;
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;
852 u32 handle = handles[i];
854 status = efi_call_early(handle_protocol, handle,
855 &uga_proto, (void **)&uga);
856 if (status != EFI_SUCCESS)
859 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
861 status = efi_early->call((unsigned long)uga->get_mode, uga,
862 &w, &h, &depth, &refresh);
863 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
868 * Once we've found a UGA supporting PCIIO,
869 * don't bother looking any further.
882 setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
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;;
892 nr_ugas = size / sizeof(u64);
893 for (i = 0; i < nr_ugas; i++) {
894 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
895 u32 w, h, depth, refresh;
897 u64 handle = handles[i];
899 status = efi_call_early(handle_protocol, handle,
900 &uga_proto, (void **)&uga);
901 if (status != EFI_SUCCESS)
904 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
906 status = efi_early->call((unsigned long)uga->get_mode, uga,
907 &w, &h, &depth, &refresh);
908 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
913 * Once we've found a UGA supporting PCIIO,
914 * don't bother looking any further.
927 * See if we have Universal Graphics Adapter (UGA) protocol
929 static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
934 void **uga_handle = NULL;
936 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
937 size, (void **)&uga_handle);
938 if (status != EFI_SUCCESS)
941 status = efi_call_early(locate_handle,
942 EFI_LOCATE_BY_PROTOCOL,
943 uga_proto, NULL, &size, uga_handle);
944 if (status != EFI_SUCCESS)
951 status = setup_uga64(uga_handle, size, &width, &height);
953 status = setup_uga32(uga_handle, size, &width, &height);
955 if (!width && !height)
958 /* EFI framebuffer */
959 si->orig_video_isVGA = VIDEO_TYPE_EFI;
962 si->lfb_width = width;
963 si->lfb_height = height;
975 efi_call_early(free_pool, uga_handle);
979 void setup_graphics(struct boot_params *boot_params)
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;
986 void **gop_handle = NULL;
987 void **uga_handle = NULL;
989 si = &boot_params->screen_info;
990 memset(si, 0, sizeof(*si));
993 status = efi_call_early(locate_handle,
994 EFI_LOCATE_BY_PROTOCOL,
995 &graphics_proto, NULL, &size, gop_handle);
996 if (status == EFI_BUFFER_TOO_SMALL)
997 status = setup_gop(si, &graphics_proto, size);
999 if (status != EFI_SUCCESS) {
1001 status = efi_call_early(locate_handle,
1002 EFI_LOCATE_BY_PROTOCOL,
1003 &uga_proto, NULL, &size, uga_handle);
1004 if (status == EFI_BUFFER_TOO_SMALL)
1005 setup_uga(si, &uga_proto, size);
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
1014 * The caller is responsible for filling out ->code32_start in the
1015 * returned boot_params.
1017 struct boot_params *make_boot_params(struct efi_config *c)
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;
1025 void *options, *handle;
1026 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
1027 int options_size = 0;
1028 efi_status_t status;
1033 unsigned long ramdisk_addr;
1034 unsigned long ramdisk_size;
1035 unsigned long initrd_addr_max;
1038 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1039 handle = (void *)(unsigned long)efi_early->image_handle;
1041 /* Check if we were booted by the EFI firmware */
1042 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1045 if (efi_early->is64)
1046 setup_boot_services64(efi_early);
1048 setup_boot_services32(efi_early);
1050 status = efi_call_early(handle_protocol, handle,
1051 &proto, (void *)&image);
1052 if (status != EFI_SUCCESS) {
1053 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
1057 status = efi_low_alloc(sys_table, 0x4000, 1,
1058 (unsigned long *)&boot_params);
1059 if (status != EFI_SUCCESS) {
1060 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
1064 memset(boot_params, 0x0, 0x4000);
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;
1071 /* Copy the second sector to boot_params */
1072 memcpy(&hdr->jump, image->image_base + 512, 512);
1075 * Fill out some of the header fields ourselves because the
1076 * EFI firmware loader doesn't load the first sector.
1078 hdr->root_flags = 1;
1079 hdr->vid_mode = 0xffff;
1080 hdr->boot_flag = 0xAA55;
1082 hdr->type_of_loader = 0x21;
1084 /* Convert unicode cmdline to ascii */
1085 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
1088 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
1090 hdr->ramdisk_image = 0;
1091 hdr->ramdisk_size = 0;
1093 /* Clear APM BIOS info */
1094 memset(bi, 0, sizeof(*bi));
1096 memset(sdt, 0, sizeof(*sdt));
1098 if (hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)
1099 initrd_addr_max = -1UL;
1101 initrd_addr_max = hdr->initrd_addr_max;
1103 status = handle_cmdline_files(sys_table, image,
1104 (char *)(unsigned long)hdr->cmd_line_ptr,
1105 "initrd=", initrd_addr_max,
1106 &ramdisk_addr, &ramdisk_size);
1107 if (status != EFI_SUCCESS)
1109 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
1110 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
1111 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
1112 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
1116 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
1118 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
1122 static void add_e820ext(struct boot_params *params,
1123 struct setup_data *e820ext, u32 nr_entries)
1125 struct setup_data *data;
1126 efi_status_t status;
1129 e820ext->type = SETUP_E820_EXT;
1130 e820ext->len = nr_entries * sizeof(struct e820entry);
1133 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
1135 while (data && data->next)
1136 data = (struct setup_data *)(unsigned long)data->next;
1139 data->next = (unsigned long)e820ext;
1141 params->hdr.setup_data = (unsigned long)e820ext;
1144 static efi_status_t setup_e820(struct boot_params *params,
1145 struct setup_data *e820ext, u32 e820ext_size)
1147 struct e820entry *e820_map = ¶ms->e820_map[0];
1148 struct efi_info *efi = ¶ms->efi_info;
1149 struct e820entry *prev = NULL;
1155 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1157 for (i = 0; i < nr_desc; i++) {
1158 efi_memory_desc_t *d;
1159 unsigned int e820_type = 0;
1160 unsigned long m = efi->efi_memmap;
1162 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
1164 case EFI_RESERVED_TYPE:
1165 case EFI_RUNTIME_SERVICES_CODE:
1166 case EFI_RUNTIME_SERVICES_DATA:
1167 case EFI_MEMORY_MAPPED_IO:
1168 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1170 e820_type = E820_RESERVED;
1173 case EFI_UNUSABLE_MEMORY:
1174 e820_type = E820_UNUSABLE;
1177 case EFI_ACPI_RECLAIM_MEMORY:
1178 e820_type = E820_ACPI;
1181 case EFI_LOADER_CODE:
1182 case EFI_LOADER_DATA:
1183 case EFI_BOOT_SERVICES_CODE:
1184 case EFI_BOOT_SERVICES_DATA:
1185 case EFI_CONVENTIONAL_MEMORY:
1186 e820_type = E820_RAM;
1189 case EFI_ACPI_MEMORY_NVS:
1190 e820_type = E820_NVS;
1197 /* Merge adjacent mappings */
1198 if (prev && prev->type == e820_type &&
1199 (prev->addr + prev->size) == d->phys_addr) {
1200 prev->size += d->num_pages << 12;
1204 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1205 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1206 sizeof(struct setup_data);
1208 if (!e820ext || e820ext_size < need)
1209 return EFI_BUFFER_TOO_SMALL;
1211 /* boot_params map full, switch to e820 extended */
1212 e820_map = (struct e820entry *)e820ext->data;
1215 e820_map->addr = d->phys_addr;
1216 e820_map->size = d->num_pages << PAGE_SHIFT;
1217 e820_map->type = e820_type;
1222 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1223 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1225 add_e820ext(params, e820ext, nr_e820ext);
1226 nr_entries -= nr_e820ext;
1229 params->e820_entries = (u8)nr_entries;
1234 static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1237 efi_status_t status;
1240 size = sizeof(struct setup_data) +
1241 sizeof(struct e820entry) * nr_desc;
1244 efi_call_early(free_pool, *e820ext);
1249 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1250 size, (void **)e820ext);
1251 if (status == EFI_SUCCESS)
1252 *e820ext_size = size;
1257 static efi_status_t exit_boot(struct boot_params *boot_params,
1258 void *handle, bool is64)
1260 struct efi_info *efi = &boot_params->efi_info;
1261 unsigned long map_sz, key, desc_size;
1262 efi_memory_desc_t *mem_map;
1263 struct setup_data *e820ext;
1264 const char *signature;
1266 __u32 nr_desc, prev_nr_desc;
1267 efi_status_t status;
1269 bool called_exit = false;
1278 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1279 &desc_version, &key);
1281 if (status != EFI_SUCCESS)
1284 prev_nr_desc = nr_desc;
1285 nr_desc = map_sz / desc_size;
1286 if (nr_desc > prev_nr_desc &&
1287 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1288 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1290 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1291 if (status != EFI_SUCCESS)
1294 efi_call_early(free_pool, mem_map);
1295 goto get_map; /* Allocated memory, get map again */
1298 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1299 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1301 efi->efi_systab = (unsigned long)sys_table;
1302 efi->efi_memdesc_size = desc_size;
1303 efi->efi_memdesc_version = desc_version;
1304 efi->efi_memmap = (unsigned long)mem_map;
1305 efi->efi_memmap_size = map_sz;
1307 #ifdef CONFIG_X86_64
1308 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1309 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1312 /* Might as well exit boot services now */
1313 status = efi_call_early(exit_boot_services, handle, key);
1314 if (status != EFI_SUCCESS) {
1316 * ExitBootServices() will fail if any of the event
1317 * handlers change the memory map. In which case, we
1318 * must be prepared to retry, but only once so that
1319 * we're guaranteed to exit on repeated failures instead
1320 * of spinning forever.
1326 efi_call_early(free_pool, mem_map);
1331 boot_params->alt_mem_k = 32 * 1024;
1333 status = setup_e820(boot_params, e820ext, e820ext_size);
1334 if (status != EFI_SUCCESS)
1340 efi_call_early(free_pool, mem_map);
1345 * On success we return a pointer to a boot_params structure, and NULL
1348 struct boot_params *efi_main(struct efi_config *c,
1349 struct boot_params *boot_params)
1351 struct desc_ptr *gdt = NULL;
1352 efi_loaded_image_t *image;
1353 struct setup_header *hdr = &boot_params->hdr;
1354 efi_status_t status;
1355 struct desc_struct *desc;
1357 efi_system_table_t *_table;
1362 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1363 handle = (void *)(unsigned long)efi_early->image_handle;
1364 is64 = efi_early->is64;
1368 /* Check if we were booted by the EFI firmware */
1369 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1373 setup_boot_services64(efi_early);
1375 setup_boot_services32(efi_early);
1377 setup_graphics(boot_params);
1379 status = setup_efi_pci(boot_params);
1380 if (status != EFI_SUCCESS) {
1381 efi_printk(sys_table, "setup_efi_pci() failed!\n");
1384 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1385 sizeof(*gdt), (void **)&gdt);
1386 if (status != EFI_SUCCESS) {
1387 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1392 status = efi_low_alloc(sys_table, gdt->size, 8,
1393 (unsigned long *)&gdt->address);
1394 if (status != EFI_SUCCESS) {
1395 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1400 * If the kernel isn't already loaded at the preferred load
1401 * address, relocate it.
1403 if (hdr->pref_address != hdr->code32_start) {
1404 unsigned long bzimage_addr = hdr->code32_start;
1405 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1406 hdr->init_size, hdr->init_size,
1408 hdr->kernel_alignment);
1409 if (status != EFI_SUCCESS) {
1410 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
1414 hdr->pref_address = hdr->code32_start;
1415 hdr->code32_start = bzimage_addr;
1418 status = exit_boot(boot_params, handle, is64);
1419 if (status != EFI_SUCCESS) {
1420 efi_printk(sys_table, "exit_boot() failed!\n");
1424 memset((char *)gdt->address, 0x0, gdt->size);
1425 desc = (struct desc_struct *)gdt->address;
1427 /* The first GDT is a dummy and the second is unused. */
1430 desc->limit0 = 0xffff;
1431 desc->base0 = 0x0000;
1432 desc->base1 = 0x0000;
1433 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1434 desc->s = DESC_TYPE_CODE_DATA;
1440 desc->d = SEG_OP_SIZE_32BIT;
1441 desc->g = SEG_GRANULARITY_4KB;
1445 desc->limit0 = 0xffff;
1446 desc->base0 = 0x0000;
1447 desc->base1 = 0x0000;
1448 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1449 desc->s = DESC_TYPE_CODE_DATA;
1455 desc->d = SEG_OP_SIZE_32BIT;
1456 desc->g = SEG_GRANULARITY_4KB;
1459 #ifdef CONFIG_X86_64
1460 /* Task segment value */
1462 desc->limit0 = 0x0000;
1463 desc->base0 = 0x0000;
1464 desc->base1 = 0x0000;
1465 desc->type = SEG_TYPE_TSS;
1473 desc->g = SEG_GRANULARITY_4KB;
1475 #endif /* CONFIG_X86_64 */
1477 asm volatile("cli");
1478 asm volatile ("lgdt %0" : : "m" (*gdt));
1482 efi_printk(sys_table, "efi_main() failed!\n");