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 #include "../string.h"
19 static efi_system_table_t *sys_table;
21 static struct efi_config *efi_early;
23 __pure const struct efi_config *__efi_early(void)
28 #define BOOT_SERVICES(bits) \
29 static void setup_boot_services##bits(struct efi_config *c) \
31 efi_system_table_##bits##_t *table; \
32 efi_boot_services_##bits##_t *bt; \
34 table = (typeof(table))sys_table; \
36 c->text_output = table->con_out; \
38 bt = (typeof(bt))(unsigned long)(table->boottime); \
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; \
52 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
55 __file_size32(void *__fh, efi_char16_t *filename_16,
56 void **handle, u64 *file_sz)
58 efi_file_handle_32_t *h, *fh = __fh;
59 efi_file_info_t *info;
61 efi_guid_t info_guid = EFI_FILE_INFO_ID;
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");
76 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
78 if (status != EFI_BUFFER_TOO_SMALL) {
79 efi_printk(sys_table, "Failed to get file info size\n");
84 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
85 info_sz, (void **)&info);
86 if (status != EFI_SUCCESS) {
87 efi_printk(sys_table, "Failed to alloc mem for file info\n");
91 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
93 if (status == EFI_BUFFER_TOO_SMALL) {
94 efi_call_early(free_pool, info);
98 *file_sz = info->file_size;
99 efi_call_early(free_pool, info);
101 if (status != EFI_SUCCESS)
102 efi_printk(sys_table, "Failed to get initrd info\n");
108 __file_size64(void *__fh, efi_char16_t *filename_16,
109 void **handle, u64 *file_sz)
111 efi_file_handle_64_t *h, *fh = __fh;
112 efi_file_info_t *info;
114 efi_guid_t info_guid = EFI_FILE_INFO_ID;
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");
129 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
131 if (status != EFI_BUFFER_TOO_SMALL) {
132 efi_printk(sys_table, "Failed to get file info size\n");
137 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
138 info_sz, (void **)&info);
139 if (status != EFI_SUCCESS) {
140 efi_printk(sys_table, "Failed to alloc mem for file info\n");
144 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
146 if (status == EFI_BUFFER_TOO_SMALL) {
147 efi_call_early(free_pool, info);
151 *file_sz = info->file_size;
152 efi_call_early(free_pool, info);
154 if (status != EFI_SUCCESS)
155 efi_printk(sys_table, "Failed to get initrd info\n");
160 efi_file_size(efi_system_table_t *sys_table, void *__fh,
161 efi_char16_t *filename_16, void **handle, u64 *file_sz)
164 return __file_size64(__fh, filename_16, handle, file_sz);
166 return __file_size32(__fh, filename_16, handle, file_sz);
170 efi_file_read(void *handle, unsigned long *size, void *addr)
174 if (efi_early->is64) {
175 efi_file_handle_64_t *fh = handle;
177 func = (unsigned long)fh->read;
178 return efi_early->call(func, handle, size, addr);
180 efi_file_handle_32_t *fh = handle;
182 func = (unsigned long)fh->read;
183 return efi_early->call(func, handle, size, addr);
187 efi_status_t efi_file_close(void *handle)
189 if (efi_early->is64) {
190 efi_file_handle_64_t *fh = handle;
192 return efi_early->call((unsigned long)fh->close, handle);
194 efi_file_handle_32_t *fh = handle;
196 return efi_early->call((unsigned long)fh->close, handle);
200 static inline efi_status_t __open_volume32(void *__image, void **__fh)
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;
207 void *handle = (void *)(unsigned long)image->device_handle;
210 status = efi_call_early(handle_protocol, handle,
211 &fs_proto, (void **)&io);
212 if (status != EFI_SUCCESS) {
213 efi_printk(sys_table, "Failed to handle fs_proto\n");
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");
226 static inline efi_status_t __open_volume64(void *__image, void **__fh)
228 efi_file_io_interface_t *io;
229 efi_loaded_image_64_t *image = __image;
230 efi_file_handle_64_t *fh;
231 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
233 void *handle = (void *)(unsigned long)image->device_handle;
236 status = efi_call_early(handle_protocol, handle,
237 &fs_proto, (void **)&io);
238 if (status != EFI_SUCCESS) {
239 efi_printk(sys_table, "Failed to handle fs_proto\n");
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");
253 efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
256 return __open_volume64(__image, __fh);
258 return __open_volume32(__image, __fh);
261 void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
263 unsigned long output_string;
266 if (efi_early->is64) {
267 struct efi_simple_text_output_protocol_64 *out;
270 offset = offsetof(typeof(*out), output_string);
271 output_string = efi_early->text_output + offset;
272 out = (typeof(out))(unsigned long)efi_early->text_output;
273 func = (u64 *)output_string;
275 efi_early->call(*func, out, str);
277 struct efi_simple_text_output_protocol_32 *out;
280 offset = offsetof(typeof(*out), output_string);
281 output_string = efi_early->text_output + offset;
282 out = (typeof(out))(unsigned long)efi_early->text_output;
283 func = (u32 *)output_string;
285 efi_early->call(*func, out, str);
289 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
297 while (!(mask & 0x1)) {
313 __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
315 struct pci_setup_rom *rom = NULL;
320 status = efi_early->call(pci->attributes, pci,
321 EfiPciIoAttributeOperationGet, 0, 0,
323 if (status != EFI_SUCCESS)
326 if (!pci->romimage || !pci->romsize)
327 return EFI_INVALID_PARAMETER;
329 size = pci->romsize + sizeof(*rom);
331 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
332 if (status != EFI_SUCCESS) {
333 efi_printk(sys_table, "Failed to alloc mem for rom\n");
337 memset(rom, 0, sizeof(*rom));
339 rom->data.type = SETUP_PCI;
340 rom->data.len = size - sizeof(struct setup_data);
342 rom->pcilen = pci->romsize;
345 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
346 PCI_VENDOR_ID, 1, &(rom->vendor));
348 if (status != EFI_SUCCESS) {
349 efi_printk(sys_table, "Failed to read rom->vendor\n");
353 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
354 PCI_DEVICE_ID, 1, &(rom->devid));
356 if (status != EFI_SUCCESS) {
357 efi_printk(sys_table, "Failed to read rom->devid\n");
361 status = efi_early->call(pci->get_location, pci, &(rom->segment),
362 &(rom->bus), &(rom->device), &(rom->function));
364 if (status != EFI_SUCCESS)
367 memcpy(rom->romdata, (void *)(unsigned long)pci->romimage,
372 efi_call_early(free_pool, rom);
377 setup_efi_pci32(struct boot_params *params, void **pci_handle,
380 efi_pci_io_protocol_32 *pci = NULL;
381 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
382 u32 *handles = (u32 *)(unsigned long)pci_handle;
384 unsigned long nr_pci;
385 struct setup_data *data;
388 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
390 while (data && data->next)
391 data = (struct setup_data *)(unsigned long)data->next;
393 nr_pci = size / sizeof(u32);
394 for (i = 0; i < nr_pci; i++) {
395 struct pci_setup_rom *rom = NULL;
398 status = efi_call_early(handle_protocol, h,
399 &pci_proto, (void **)&pci);
401 if (status != EFI_SUCCESS)
407 status = __setup_efi_pci32(pci, &rom);
408 if (status != EFI_SUCCESS)
412 data->next = (unsigned long)rom;
414 params->hdr.setup_data = (unsigned long)rom;
416 data = (struct setup_data *)rom;
422 __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
424 struct pci_setup_rom *rom;
429 status = efi_early->call(pci->attributes, pci,
430 EfiPciIoAttributeOperationGet, 0,
432 if (status != EFI_SUCCESS)
435 if (!pci->romimage || !pci->romsize)
436 return EFI_INVALID_PARAMETER;
438 size = pci->romsize + sizeof(*rom);
440 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
441 if (status != EFI_SUCCESS) {
442 efi_printk(sys_table, "Failed to alloc mem for rom\n");
446 rom->data.type = SETUP_PCI;
447 rom->data.len = size - sizeof(struct setup_data);
449 rom->pcilen = pci->romsize;
452 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
453 PCI_VENDOR_ID, 1, &(rom->vendor));
455 if (status != EFI_SUCCESS) {
456 efi_printk(sys_table, "Failed to read rom->vendor\n");
460 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
461 PCI_DEVICE_ID, 1, &(rom->devid));
463 if (status != EFI_SUCCESS) {
464 efi_printk(sys_table, "Failed to read rom->devid\n");
468 status = efi_early->call(pci->get_location, pci, &(rom->segment),
469 &(rom->bus), &(rom->device), &(rom->function));
471 if (status != EFI_SUCCESS)
474 memcpy(rom->romdata, (void *)(unsigned long)pci->romimage,
479 efi_call_early(free_pool, rom);
485 setup_efi_pci64(struct boot_params *params, void **pci_handle,
488 efi_pci_io_protocol_64 *pci = NULL;
489 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
490 u64 *handles = (u64 *)(unsigned long)pci_handle;
492 unsigned long nr_pci;
493 struct setup_data *data;
496 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
498 while (data && data->next)
499 data = (struct setup_data *)(unsigned long)data->next;
501 nr_pci = size / sizeof(u64);
502 for (i = 0; i < nr_pci; i++) {
503 struct pci_setup_rom *rom = NULL;
506 status = efi_call_early(handle_protocol, h,
507 &pci_proto, (void **)&pci);
509 if (status != EFI_SUCCESS)
515 status = __setup_efi_pci64(pci, &rom);
516 if (status != EFI_SUCCESS)
520 data->next = (unsigned long)rom;
522 params->hdr.setup_data = (unsigned long)rom;
524 data = (struct setup_data *)rom;
530 * There's no way to return an informative status from this function,
531 * because any analysis (and printing of error messages) needs to be
532 * done directly at the EFI function call-site.
534 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
535 * just didn't find any PCI devices, but there's no way to tell outside
536 * the context of the call.
538 static void setup_efi_pci(struct boot_params *params)
541 void **pci_handle = NULL;
542 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
543 unsigned long size = 0;
545 status = efi_call_early(locate_handle,
546 EFI_LOCATE_BY_PROTOCOL,
547 &pci_proto, NULL, &size, pci_handle);
549 if (status == EFI_BUFFER_TOO_SMALL) {
550 status = efi_call_early(allocate_pool,
552 size, (void **)&pci_handle);
554 if (status != EFI_SUCCESS) {
555 efi_printk(sys_table, "Failed to alloc mem for pci_handle\n");
559 status = efi_call_early(locate_handle,
560 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
561 NULL, &size, pci_handle);
564 if (status != EFI_SUCCESS)
568 setup_efi_pci64(params, pci_handle, size);
570 setup_efi_pci32(params, pci_handle, size);
573 efi_call_early(free_pool, pci_handle);
577 setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
578 struct efi_pixel_bitmask pixel_info, int pixel_format)
580 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
582 si->lfb_linelength = pixels_per_scan_line * 4;
591 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
593 si->lfb_linelength = pixels_per_scan_line * 4;
602 } else if (pixel_format == PIXEL_BIT_MASK) {
603 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
604 find_bits(pixel_info.green_mask, &si->green_pos,
606 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
607 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
609 si->lfb_depth = si->red_size + si->green_size +
610 si->blue_size + si->rsvd_size;
611 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
614 si->lfb_linelength = si->lfb_width / 2;
627 __gop_query32(struct efi_graphics_output_protocol_32 *gop32,
628 struct efi_graphics_output_mode_info **info,
629 unsigned long *size, u64 *fb_base)
631 struct efi_graphics_output_protocol_mode_32 *mode;
636 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
638 status = efi_early->call(gop32->query_mode, gop32,
639 mode->mode, size, info);
640 if (status != EFI_SUCCESS)
643 *fb_base = mode->frame_buffer_base;
648 setup_gop32(struct screen_info *si, efi_guid_t *proto,
649 unsigned long size, void **gop_handle)
651 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
652 unsigned long nr_gops;
654 u32 pixels_per_scan_line;
657 struct efi_pixel_bitmask pixel_info;
660 u32 *handles = (u32 *)(unsigned long)gop_handle;
666 nr_gops = size / sizeof(u32);
667 for (i = 0; i < nr_gops; i++) {
668 struct efi_graphics_output_mode_info *info = NULL;
669 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
670 bool conout_found = false;
675 status = efi_call_early(handle_protocol, h,
676 proto, (void **)&gop32);
677 if (status != EFI_SUCCESS)
680 status = efi_call_early(handle_protocol, h,
681 &conout_proto, &dummy);
682 if (status == EFI_SUCCESS)
685 status = __gop_query32(gop32, &info, &size, ¤t_fb_base);
686 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
688 * Systems that use the UEFI Console Splitter may
689 * provide multiple GOP devices, not all of which are
690 * backed by real hardware. The workaround is to search
691 * for a GOP implementing the ConOut protocol, and if
692 * one isn't found, to just fall back to the first GOP.
694 width = info->horizontal_resolution;
695 height = info->vertical_resolution;
696 pixel_format = info->pixel_format;
697 pixel_info = info->pixel_information;
698 pixels_per_scan_line = info->pixels_per_scan_line;
699 fb_base = current_fb_base;
702 * Once we've found a GOP supporting ConOut,
703 * don't bother looking any further.
711 /* Did we find any GOPs? */
715 /* EFI framebuffer */
716 si->orig_video_isVGA = VIDEO_TYPE_EFI;
718 si->lfb_width = width;
719 si->lfb_height = height;
720 si->lfb_base = fb_base;
722 ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
724 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
725 si->ext_lfb_base = ext_lfb_base;
730 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
732 si->lfb_size = si->lfb_linelength * si->lfb_height;
734 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
740 __gop_query64(struct efi_graphics_output_protocol_64 *gop64,
741 struct efi_graphics_output_mode_info **info,
742 unsigned long *size, u64 *fb_base)
744 struct efi_graphics_output_protocol_mode_64 *mode;
749 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
751 status = efi_early->call(gop64->query_mode, gop64,
752 mode->mode, size, info);
753 if (status != EFI_SUCCESS)
756 *fb_base = mode->frame_buffer_base;
761 setup_gop64(struct screen_info *si, efi_guid_t *proto,
762 unsigned long size, void **gop_handle)
764 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
765 unsigned long nr_gops;
767 u32 pixels_per_scan_line;
770 struct efi_pixel_bitmask pixel_info;
773 u64 *handles = (u64 *)(unsigned long)gop_handle;
779 nr_gops = size / sizeof(u64);
780 for (i = 0; i < nr_gops; i++) {
781 struct efi_graphics_output_mode_info *info = NULL;
782 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
783 bool conout_found = false;
788 status = efi_call_early(handle_protocol, h,
789 proto, (void **)&gop64);
790 if (status != EFI_SUCCESS)
793 status = efi_call_early(handle_protocol, h,
794 &conout_proto, &dummy);
795 if (status == EFI_SUCCESS)
798 status = __gop_query64(gop64, &info, &size, ¤t_fb_base);
799 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
801 * Systems that use the UEFI Console Splitter may
802 * provide multiple GOP devices, not all of which are
803 * backed by real hardware. The workaround is to search
804 * for a GOP implementing the ConOut protocol, and if
805 * one isn't found, to just fall back to the first GOP.
807 width = info->horizontal_resolution;
808 height = info->vertical_resolution;
809 pixel_format = info->pixel_format;
810 pixel_info = info->pixel_information;
811 pixels_per_scan_line = info->pixels_per_scan_line;
812 fb_base = current_fb_base;
815 * Once we've found a GOP supporting ConOut,
816 * don't bother looking any further.
824 /* Did we find any GOPs? */
828 /* EFI framebuffer */
829 si->orig_video_isVGA = VIDEO_TYPE_EFI;
831 si->lfb_width = width;
832 si->lfb_height = height;
833 si->lfb_base = fb_base;
835 ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
837 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
838 si->ext_lfb_base = ext_lfb_base;
843 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
845 si->lfb_size = si->lfb_linelength * si->lfb_height;
847 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
853 * See if we have Graphics Output Protocol
855 static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
859 void **gop_handle = NULL;
861 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
862 size, (void **)&gop_handle);
863 if (status != EFI_SUCCESS)
866 status = efi_call_early(locate_handle,
867 EFI_LOCATE_BY_PROTOCOL,
868 proto, NULL, &size, gop_handle);
869 if (status != EFI_SUCCESS)
873 status = setup_gop64(si, proto, size, gop_handle);
875 status = setup_gop32(si, proto, size, gop_handle);
878 efi_call_early(free_pool, gop_handle);
883 setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
885 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
886 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
887 unsigned long nr_ugas;
888 u32 *handles = (u32 *)uga_handle;;
893 nr_ugas = size / sizeof(u32);
894 for (i = 0; i < nr_ugas; i++) {
895 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
896 u32 w, h, depth, refresh;
898 u32 handle = handles[i];
900 status = efi_call_early(handle_protocol, handle,
901 &uga_proto, (void **)&uga);
902 if (status != EFI_SUCCESS)
905 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
907 status = efi_early->call((unsigned long)uga->get_mode, uga,
908 &w, &h, &depth, &refresh);
909 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
914 * Once we've found a UGA supporting PCIIO,
915 * don't bother looking any further.
928 setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
930 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
931 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
932 unsigned long nr_ugas;
933 u64 *handles = (u64 *)uga_handle;;
938 nr_ugas = size / sizeof(u64);
939 for (i = 0; i < nr_ugas; i++) {
940 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
941 u32 w, h, depth, refresh;
943 u64 handle = handles[i];
945 status = efi_call_early(handle_protocol, handle,
946 &uga_proto, (void **)&uga);
947 if (status != EFI_SUCCESS)
950 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
952 status = efi_early->call((unsigned long)uga->get_mode, uga,
953 &w, &h, &depth, &refresh);
954 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
959 * Once we've found a UGA supporting PCIIO,
960 * don't bother looking any further.
973 * See if we have Universal Graphics Adapter (UGA) protocol
975 static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
980 void **uga_handle = NULL;
982 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
983 size, (void **)&uga_handle);
984 if (status != EFI_SUCCESS)
987 status = efi_call_early(locate_handle,
988 EFI_LOCATE_BY_PROTOCOL,
989 uga_proto, NULL, &size, uga_handle);
990 if (status != EFI_SUCCESS)
997 status = setup_uga64(uga_handle, size, &width, &height);
999 status = setup_uga32(uga_handle, size, &width, &height);
1001 if (!width && !height)
1004 /* EFI framebuffer */
1005 si->orig_video_isVGA = VIDEO_TYPE_EFI;
1008 si->lfb_width = width;
1009 si->lfb_height = height;
1021 efi_call_early(free_pool, uga_handle);
1025 void setup_graphics(struct boot_params *boot_params)
1027 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
1028 struct screen_info *si;
1029 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
1030 efi_status_t status;
1032 void **gop_handle = NULL;
1033 void **uga_handle = NULL;
1035 si = &boot_params->screen_info;
1036 memset(si, 0, sizeof(*si));
1039 status = efi_call_early(locate_handle,
1040 EFI_LOCATE_BY_PROTOCOL,
1041 &graphics_proto, NULL, &size, gop_handle);
1042 if (status == EFI_BUFFER_TOO_SMALL)
1043 status = setup_gop(si, &graphics_proto, size);
1045 if (status != EFI_SUCCESS) {
1047 status = efi_call_early(locate_handle,
1048 EFI_LOCATE_BY_PROTOCOL,
1049 &uga_proto, NULL, &size, uga_handle);
1050 if (status == EFI_BUFFER_TOO_SMALL)
1051 setup_uga(si, &uga_proto, size);
1056 * Because the x86 boot code expects to be passed a boot_params we
1057 * need to create one ourselves (usually the bootloader would create
1060 * The caller is responsible for filling out ->code32_start in the
1061 * returned boot_params.
1063 struct boot_params *make_boot_params(struct efi_config *c)
1065 struct boot_params *boot_params;
1066 struct apm_bios_info *bi;
1067 struct setup_header *hdr;
1068 struct efi_info *efi;
1069 efi_loaded_image_t *image;
1070 void *options, *handle;
1071 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
1072 int options_size = 0;
1073 efi_status_t status;
1078 unsigned long ramdisk_addr;
1079 unsigned long ramdisk_size;
1082 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1083 handle = (void *)(unsigned long)efi_early->image_handle;
1085 /* Check if we were booted by the EFI firmware */
1086 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1089 if (efi_early->is64)
1090 setup_boot_services64(efi_early);
1092 setup_boot_services32(efi_early);
1094 status = efi_call_early(handle_protocol, handle,
1095 &proto, (void *)&image);
1096 if (status != EFI_SUCCESS) {
1097 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
1101 status = efi_low_alloc(sys_table, 0x4000, 1,
1102 (unsigned long *)&boot_params);
1103 if (status != EFI_SUCCESS) {
1104 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
1108 memset(boot_params, 0x0, 0x4000);
1110 hdr = &boot_params->hdr;
1111 efi = &boot_params->efi_info;
1112 bi = &boot_params->apm_bios_info;
1114 /* Copy the second sector to boot_params */
1115 memcpy(&hdr->jump, image->image_base + 512, 512);
1118 * Fill out some of the header fields ourselves because the
1119 * EFI firmware loader doesn't load the first sector.
1121 hdr->root_flags = 1;
1122 hdr->vid_mode = 0xffff;
1123 hdr->boot_flag = 0xAA55;
1125 hdr->type_of_loader = 0x21;
1127 /* Convert unicode cmdline to ascii */
1128 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
1131 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
1132 /* Fill in upper bits of command line address, NOP on 32 bit */
1133 boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
1135 hdr->ramdisk_image = 0;
1136 hdr->ramdisk_size = 0;
1138 /* Clear APM BIOS info */
1139 memset(bi, 0, sizeof(*bi));
1141 status = efi_parse_options(cmdline_ptr);
1142 if (status != EFI_SUCCESS)
1145 status = handle_cmdline_files(sys_table, image,
1146 (char *)(unsigned long)hdr->cmd_line_ptr,
1147 "initrd=", hdr->initrd_addr_max,
1148 &ramdisk_addr, &ramdisk_size);
1150 if (status != EFI_SUCCESS &&
1151 hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
1152 efi_printk(sys_table, "Trying to load files to higher address\n");
1153 status = handle_cmdline_files(sys_table, image,
1154 (char *)(unsigned long)hdr->cmd_line_ptr,
1156 &ramdisk_addr, &ramdisk_size);
1159 if (status != EFI_SUCCESS)
1161 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
1162 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
1163 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
1164 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
1168 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
1170 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
1174 static void add_e820ext(struct boot_params *params,
1175 struct setup_data *e820ext, u32 nr_entries)
1177 struct setup_data *data;
1178 efi_status_t status;
1181 e820ext->type = SETUP_E820_EXT;
1182 e820ext->len = nr_entries * sizeof(struct e820entry);
1185 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
1187 while (data && data->next)
1188 data = (struct setup_data *)(unsigned long)data->next;
1191 data->next = (unsigned long)e820ext;
1193 params->hdr.setup_data = (unsigned long)e820ext;
1196 static efi_status_t setup_e820(struct boot_params *params,
1197 struct setup_data *e820ext, u32 e820ext_size)
1199 struct e820entry *e820_map = ¶ms->e820_map[0];
1200 struct efi_info *efi = ¶ms->efi_info;
1201 struct e820entry *prev = NULL;
1207 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1209 for (i = 0; i < nr_desc; i++) {
1210 efi_memory_desc_t *d;
1211 unsigned int e820_type = 0;
1212 unsigned long m = efi->efi_memmap;
1214 #ifdef CONFIG_X86_64
1215 m |= (u64)efi->efi_memmap_hi << 32;
1218 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
1220 case EFI_RESERVED_TYPE:
1221 case EFI_RUNTIME_SERVICES_CODE:
1222 case EFI_RUNTIME_SERVICES_DATA:
1223 case EFI_MEMORY_MAPPED_IO:
1224 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1226 e820_type = E820_RESERVED;
1229 case EFI_UNUSABLE_MEMORY:
1230 e820_type = E820_UNUSABLE;
1233 case EFI_ACPI_RECLAIM_MEMORY:
1234 e820_type = E820_ACPI;
1237 case EFI_LOADER_CODE:
1238 case EFI_LOADER_DATA:
1239 case EFI_BOOT_SERVICES_CODE:
1240 case EFI_BOOT_SERVICES_DATA:
1241 case EFI_CONVENTIONAL_MEMORY:
1242 e820_type = E820_RAM;
1245 case EFI_ACPI_MEMORY_NVS:
1246 e820_type = E820_NVS;
1249 case EFI_PERSISTENT_MEMORY:
1250 e820_type = E820_PMEM;
1257 /* Merge adjacent mappings */
1258 if (prev && prev->type == e820_type &&
1259 (prev->addr + prev->size) == d->phys_addr) {
1260 prev->size += d->num_pages << 12;
1264 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1265 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1266 sizeof(struct setup_data);
1268 if (!e820ext || e820ext_size < need)
1269 return EFI_BUFFER_TOO_SMALL;
1271 /* boot_params map full, switch to e820 extended */
1272 e820_map = (struct e820entry *)e820ext->data;
1275 e820_map->addr = d->phys_addr;
1276 e820_map->size = d->num_pages << PAGE_SHIFT;
1277 e820_map->type = e820_type;
1282 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1283 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1285 add_e820ext(params, e820ext, nr_e820ext);
1286 nr_entries -= nr_e820ext;
1289 params->e820_entries = (u8)nr_entries;
1294 static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1297 efi_status_t status;
1300 size = sizeof(struct setup_data) +
1301 sizeof(struct e820entry) * nr_desc;
1304 efi_call_early(free_pool, *e820ext);
1309 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1310 size, (void **)e820ext);
1311 if (status == EFI_SUCCESS)
1312 *e820ext_size = size;
1317 static efi_status_t exit_boot(struct boot_params *boot_params,
1318 void *handle, bool is64)
1320 struct efi_info *efi = &boot_params->efi_info;
1321 unsigned long map_sz, key, desc_size;
1322 efi_memory_desc_t *mem_map;
1323 struct setup_data *e820ext;
1324 const char *signature;
1326 __u32 nr_desc, prev_nr_desc;
1327 efi_status_t status;
1329 bool called_exit = false;
1338 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1339 &desc_version, &key);
1341 if (status != EFI_SUCCESS)
1344 prev_nr_desc = nr_desc;
1345 nr_desc = map_sz / desc_size;
1346 if (nr_desc > prev_nr_desc &&
1347 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1348 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1350 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1351 if (status != EFI_SUCCESS)
1354 efi_call_early(free_pool, mem_map);
1355 goto get_map; /* Allocated memory, get map again */
1358 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1359 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1361 efi->efi_systab = (unsigned long)sys_table;
1362 efi->efi_memdesc_size = desc_size;
1363 efi->efi_memdesc_version = desc_version;
1364 efi->efi_memmap = (unsigned long)mem_map;
1365 efi->efi_memmap_size = map_sz;
1367 #ifdef CONFIG_X86_64
1368 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1369 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1372 /* Might as well exit boot services now */
1373 status = efi_call_early(exit_boot_services, handle, key);
1374 if (status != EFI_SUCCESS) {
1376 * ExitBootServices() will fail if any of the event
1377 * handlers change the memory map. In which case, we
1378 * must be prepared to retry, but only once so that
1379 * we're guaranteed to exit on repeated failures instead
1380 * of spinning forever.
1386 efi_call_early(free_pool, mem_map);
1391 boot_params->alt_mem_k = 32 * 1024;
1393 status = setup_e820(boot_params, e820ext, e820ext_size);
1394 if (status != EFI_SUCCESS)
1400 efi_call_early(free_pool, mem_map);
1405 * On success we return a pointer to a boot_params structure, and NULL
1408 struct boot_params *efi_main(struct efi_config *c,
1409 struct boot_params *boot_params)
1411 struct desc_ptr *gdt = NULL;
1412 efi_loaded_image_t *image;
1413 struct setup_header *hdr = &boot_params->hdr;
1414 efi_status_t status;
1415 struct desc_struct *desc;
1417 efi_system_table_t *_table;
1422 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1423 handle = (void *)(unsigned long)efi_early->image_handle;
1424 is64 = efi_early->is64;
1428 /* Check if we were booted by the EFI firmware */
1429 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1433 setup_boot_services64(efi_early);
1435 setup_boot_services32(efi_early);
1437 setup_graphics(boot_params);
1439 setup_efi_pci(boot_params);
1441 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1442 sizeof(*gdt), (void **)&gdt);
1443 if (status != EFI_SUCCESS) {
1444 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1449 status = efi_low_alloc(sys_table, gdt->size, 8,
1450 (unsigned long *)&gdt->address);
1451 if (status != EFI_SUCCESS) {
1452 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1457 * If the kernel isn't already loaded at the preferred load
1458 * address, relocate it.
1460 if (hdr->pref_address != hdr->code32_start) {
1461 unsigned long bzimage_addr = hdr->code32_start;
1462 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1463 hdr->init_size, hdr->init_size,
1465 hdr->kernel_alignment);
1466 if (status != EFI_SUCCESS) {
1467 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
1471 hdr->pref_address = hdr->code32_start;
1472 hdr->code32_start = bzimage_addr;
1475 status = exit_boot(boot_params, handle, is64);
1476 if (status != EFI_SUCCESS) {
1477 efi_printk(sys_table, "exit_boot() failed!\n");
1481 memset((char *)gdt->address, 0x0, gdt->size);
1482 desc = (struct desc_struct *)gdt->address;
1484 /* The first GDT is a dummy and the second is unused. */
1487 desc->limit0 = 0xffff;
1488 desc->base0 = 0x0000;
1489 desc->base1 = 0x0000;
1490 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1491 desc->s = DESC_TYPE_CODE_DATA;
1497 desc->d = SEG_OP_SIZE_32BIT;
1498 desc->g = SEG_GRANULARITY_4KB;
1502 desc->limit0 = 0xffff;
1503 desc->base0 = 0x0000;
1504 desc->base1 = 0x0000;
1505 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1506 desc->s = DESC_TYPE_CODE_DATA;
1512 desc->d = SEG_OP_SIZE_32BIT;
1513 desc->g = SEG_GRANULARITY_4KB;
1516 #ifdef CONFIG_X86_64
1517 /* Task segment value */
1519 desc->limit0 = 0x0000;
1520 desc->base0 = 0x0000;
1521 desc->base1 = 0x0000;
1522 desc->type = SEG_TYPE_TSS;
1530 desc->g = SEG_GRANULARITY_4KB;
1532 #endif /* CONFIG_X86_64 */
1534 asm volatile("cli");
1535 asm volatile ("lgdt %0" : : "m" (*gdt));
1539 efi_printk(sys_table, "efi_main() failed!\n");