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
, pci
->romimage
, pci
->romsize
);
371 efi_call_early(free_pool
, rom
);
376 setup_efi_pci32(struct boot_params
*params
, void **pci_handle
,
379 efi_pci_io_protocol_32
*pci
= NULL
;
380 efi_guid_t pci_proto
= EFI_PCI_IO_PROTOCOL_GUID
;
381 u32
*handles
= (u32
*)(unsigned long)pci_handle
;
383 unsigned long nr_pci
;
384 struct setup_data
*data
;
387 data
= (struct setup_data
*)(unsigned long)params
->hdr
.setup_data
;
389 while (data
&& data
->next
)
390 data
= (struct setup_data
*)(unsigned long)data
->next
;
392 nr_pci
= size
/ sizeof(u32
);
393 for (i
= 0; i
< nr_pci
; i
++) {
394 struct pci_setup_rom
*rom
= NULL
;
397 status
= efi_call_early(handle_protocol
, h
,
398 &pci_proto
, (void **)&pci
);
400 if (status
!= EFI_SUCCESS
)
406 status
= __setup_efi_pci32(pci
, &rom
);
407 if (status
!= EFI_SUCCESS
)
411 data
->next
= (unsigned long)rom
;
413 params
->hdr
.setup_data
= (unsigned long)rom
;
415 data
= (struct setup_data
*)rom
;
421 __setup_efi_pci64(efi_pci_io_protocol_64
*pci
, struct pci_setup_rom
**__rom
)
423 struct pci_setup_rom
*rom
;
428 status
= efi_early
->call(pci
->attributes
, pci
,
429 EfiPciIoAttributeOperationGet
, 0,
431 if (status
!= EFI_SUCCESS
)
434 if (!pci
->romimage
|| !pci
->romsize
)
435 return EFI_INVALID_PARAMETER
;
437 size
= pci
->romsize
+ sizeof(*rom
);
439 status
= efi_call_early(allocate_pool
, EFI_LOADER_DATA
, size
, &rom
);
440 if (status
!= EFI_SUCCESS
) {
441 efi_printk(sys_table
, "Failed to alloc mem for rom\n");
445 rom
->data
.type
= SETUP_PCI
;
446 rom
->data
.len
= size
- sizeof(struct setup_data
);
448 rom
->pcilen
= pci
->romsize
;
451 status
= efi_early
->call(pci
->pci
.read
, pci
, EfiPciIoWidthUint16
,
452 PCI_VENDOR_ID
, 1, &(rom
->vendor
));
454 if (status
!= EFI_SUCCESS
) {
455 efi_printk(sys_table
, "Failed to read rom->vendor\n");
459 status
= efi_early
->call(pci
->pci
.read
, pci
, EfiPciIoWidthUint16
,
460 PCI_DEVICE_ID
, 1, &(rom
->devid
));
462 if (status
!= EFI_SUCCESS
) {
463 efi_printk(sys_table
, "Failed to read rom->devid\n");
467 status
= efi_early
->call(pci
->get_location
, pci
, &(rom
->segment
),
468 &(rom
->bus
), &(rom
->device
), &(rom
->function
));
470 if (status
!= EFI_SUCCESS
)
473 memcpy(rom
->romdata
, pci
->romimage
, pci
->romsize
);
477 efi_call_early(free_pool
, rom
);
483 setup_efi_pci64(struct boot_params
*params
, void **pci_handle
,
486 efi_pci_io_protocol_64
*pci
= NULL
;
487 efi_guid_t pci_proto
= EFI_PCI_IO_PROTOCOL_GUID
;
488 u64
*handles
= (u64
*)(unsigned long)pci_handle
;
490 unsigned long nr_pci
;
491 struct setup_data
*data
;
494 data
= (struct setup_data
*)(unsigned long)params
->hdr
.setup_data
;
496 while (data
&& data
->next
)
497 data
= (struct setup_data
*)(unsigned long)data
->next
;
499 nr_pci
= size
/ sizeof(u64
);
500 for (i
= 0; i
< nr_pci
; i
++) {
501 struct pci_setup_rom
*rom
= NULL
;
504 status
= efi_call_early(handle_protocol
, h
,
505 &pci_proto
, (void **)&pci
);
507 if (status
!= EFI_SUCCESS
)
513 status
= __setup_efi_pci64(pci
, &rom
);
514 if (status
!= EFI_SUCCESS
)
518 data
->next
= (unsigned long)rom
;
520 params
->hdr
.setup_data
= (unsigned long)rom
;
522 data
= (struct setup_data
*)rom
;
528 * There's no way to return an informative status from this function,
529 * because any analysis (and printing of error messages) needs to be
530 * done directly at the EFI function call-site.
532 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
533 * just didn't find any PCI devices, but there's no way to tell outside
534 * the context of the call.
536 static void setup_efi_pci(struct boot_params
*params
)
539 void **pci_handle
= NULL
;
540 efi_guid_t pci_proto
= EFI_PCI_IO_PROTOCOL_GUID
;
541 unsigned long size
= 0;
543 status
= efi_call_early(locate_handle
,
544 EFI_LOCATE_BY_PROTOCOL
,
545 &pci_proto
, NULL
, &size
, pci_handle
);
547 if (status
== EFI_BUFFER_TOO_SMALL
) {
548 status
= efi_call_early(allocate_pool
,
550 size
, (void **)&pci_handle
);
552 if (status
!= EFI_SUCCESS
) {
553 efi_printk(sys_table
, "Failed to alloc mem for pci_handle\n");
557 status
= efi_call_early(locate_handle
,
558 EFI_LOCATE_BY_PROTOCOL
, &pci_proto
,
559 NULL
, &size
, pci_handle
);
562 if (status
!= EFI_SUCCESS
)
566 setup_efi_pci64(params
, pci_handle
, size
);
568 setup_efi_pci32(params
, pci_handle
, size
);
571 efi_call_early(free_pool
, pci_handle
);
575 setup_pixel_info(struct screen_info
*si
, u32 pixels_per_scan_line
,
576 struct efi_pixel_bitmask pixel_info
, int pixel_format
)
578 if (pixel_format
== PIXEL_RGB_RESERVED_8BIT_PER_COLOR
) {
580 si
->lfb_linelength
= pixels_per_scan_line
* 4;
589 } else if (pixel_format
== PIXEL_BGR_RESERVED_8BIT_PER_COLOR
) {
591 si
->lfb_linelength
= pixels_per_scan_line
* 4;
600 } else if (pixel_format
== PIXEL_BIT_MASK
) {
601 find_bits(pixel_info
.red_mask
, &si
->red_pos
, &si
->red_size
);
602 find_bits(pixel_info
.green_mask
, &si
->green_pos
,
604 find_bits(pixel_info
.blue_mask
, &si
->blue_pos
, &si
->blue_size
);
605 find_bits(pixel_info
.reserved_mask
, &si
->rsvd_pos
,
607 si
->lfb_depth
= si
->red_size
+ si
->green_size
+
608 si
->blue_size
+ si
->rsvd_size
;
609 si
->lfb_linelength
= (pixels_per_scan_line
* si
->lfb_depth
) / 8;
612 si
->lfb_linelength
= si
->lfb_width
/ 2;
625 __gop_query32(struct efi_graphics_output_protocol_32
*gop32
,
626 struct efi_graphics_output_mode_info
**info
,
627 unsigned long *size
, u32
*fb_base
)
629 struct efi_graphics_output_protocol_mode_32
*mode
;
634 mode
= (struct efi_graphics_output_protocol_mode_32
*)m
;
636 status
= efi_early
->call(gop32
->query_mode
, gop32
,
637 mode
->mode
, size
, info
);
638 if (status
!= EFI_SUCCESS
)
641 *fb_base
= mode
->frame_buffer_base
;
646 setup_gop32(struct screen_info
*si
, efi_guid_t
*proto
,
647 unsigned long size
, void **gop_handle
)
649 struct efi_graphics_output_protocol_32
*gop32
, *first_gop
;
650 unsigned long nr_gops
;
652 u32 pixels_per_scan_line
;
654 struct efi_pixel_bitmask pixel_info
;
657 u32
*handles
= (u32
*)(unsigned long)gop_handle
;
663 nr_gops
= size
/ sizeof(u32
);
664 for (i
= 0; i
< nr_gops
; i
++) {
665 struct efi_graphics_output_mode_info
*info
= NULL
;
666 efi_guid_t conout_proto
= EFI_CONSOLE_OUT_DEVICE_GUID
;
667 bool conout_found
= false;
672 status
= efi_call_early(handle_protocol
, h
,
673 proto
, (void **)&gop32
);
674 if (status
!= EFI_SUCCESS
)
677 status
= efi_call_early(handle_protocol
, h
,
678 &conout_proto
, &dummy
);
679 if (status
== EFI_SUCCESS
)
682 status
= __gop_query32(gop32
, &info
, &size
, ¤t_fb_base
);
683 if (status
== EFI_SUCCESS
&& (!first_gop
|| conout_found
)) {
685 * Systems that use the UEFI Console Splitter may
686 * provide multiple GOP devices, not all of which are
687 * backed by real hardware. The workaround is to search
688 * for a GOP implementing the ConOut protocol, and if
689 * one isn't found, to just fall back to the first GOP.
691 width
= info
->horizontal_resolution
;
692 height
= info
->vertical_resolution
;
693 pixel_format
= info
->pixel_format
;
694 pixel_info
= info
->pixel_information
;
695 pixels_per_scan_line
= info
->pixels_per_scan_line
;
696 fb_base
= current_fb_base
;
699 * Once we've found a GOP supporting ConOut,
700 * don't bother looking any further.
708 /* Did we find any GOPs? */
712 /* EFI framebuffer */
713 si
->orig_video_isVGA
= VIDEO_TYPE_EFI
;
715 si
->lfb_width
= width
;
716 si
->lfb_height
= height
;
717 si
->lfb_base
= fb_base
;
720 setup_pixel_info(si
, pixels_per_scan_line
, pixel_info
, pixel_format
);
722 si
->lfb_size
= si
->lfb_linelength
* si
->lfb_height
;
724 si
->capabilities
|= VIDEO_CAPABILITY_SKIP_QUIRKS
;
730 __gop_query64(struct efi_graphics_output_protocol_64
*gop64
,
731 struct efi_graphics_output_mode_info
**info
,
732 unsigned long *size
, u32
*fb_base
)
734 struct efi_graphics_output_protocol_mode_64
*mode
;
739 mode
= (struct efi_graphics_output_protocol_mode_64
*)m
;
741 status
= efi_early
->call(gop64
->query_mode
, gop64
,
742 mode
->mode
, size
, info
);
743 if (status
!= EFI_SUCCESS
)
746 *fb_base
= mode
->frame_buffer_base
;
751 setup_gop64(struct screen_info
*si
, efi_guid_t
*proto
,
752 unsigned long size
, void **gop_handle
)
754 struct efi_graphics_output_protocol_64
*gop64
, *first_gop
;
755 unsigned long nr_gops
;
757 u32 pixels_per_scan_line
;
759 struct efi_pixel_bitmask pixel_info
;
762 u64
*handles
= (u64
*)(unsigned long)gop_handle
;
768 nr_gops
= size
/ sizeof(u64
);
769 for (i
= 0; i
< nr_gops
; i
++) {
770 struct efi_graphics_output_mode_info
*info
= NULL
;
771 efi_guid_t conout_proto
= EFI_CONSOLE_OUT_DEVICE_GUID
;
772 bool conout_found
= false;
777 status
= efi_call_early(handle_protocol
, h
,
778 proto
, (void **)&gop64
);
779 if (status
!= EFI_SUCCESS
)
782 status
= efi_call_early(handle_protocol
, h
,
783 &conout_proto
, &dummy
);
784 if (status
== EFI_SUCCESS
)
787 status
= __gop_query64(gop64
, &info
, &size
, ¤t_fb_base
);
788 if (status
== EFI_SUCCESS
&& (!first_gop
|| conout_found
)) {
790 * Systems that use the UEFI Console Splitter may
791 * provide multiple GOP devices, not all of which are
792 * backed by real hardware. The workaround is to search
793 * for a GOP implementing the ConOut protocol, and if
794 * one isn't found, to just fall back to the first GOP.
796 width
= info
->horizontal_resolution
;
797 height
= info
->vertical_resolution
;
798 pixel_format
= info
->pixel_format
;
799 pixel_info
= info
->pixel_information
;
800 pixels_per_scan_line
= info
->pixels_per_scan_line
;
801 fb_base
= current_fb_base
;
804 * Once we've found a GOP supporting ConOut,
805 * don't bother looking any further.
813 /* Did we find any GOPs? */
817 /* EFI framebuffer */
818 si
->orig_video_isVGA
= VIDEO_TYPE_EFI
;
820 si
->lfb_width
= width
;
821 si
->lfb_height
= height
;
822 si
->lfb_base
= fb_base
;
825 setup_pixel_info(si
, pixels_per_scan_line
, pixel_info
, pixel_format
);
827 si
->lfb_size
= si
->lfb_linelength
* si
->lfb_height
;
829 si
->capabilities
|= VIDEO_CAPABILITY_SKIP_QUIRKS
;
835 * See if we have Graphics Output Protocol
837 static efi_status_t
setup_gop(struct screen_info
*si
, efi_guid_t
*proto
,
841 void **gop_handle
= NULL
;
843 status
= efi_call_early(allocate_pool
, EFI_LOADER_DATA
,
844 size
, (void **)&gop_handle
);
845 if (status
!= EFI_SUCCESS
)
848 status
= efi_call_early(locate_handle
,
849 EFI_LOCATE_BY_PROTOCOL
,
850 proto
, NULL
, &size
, gop_handle
);
851 if (status
!= EFI_SUCCESS
)
855 status
= setup_gop64(si
, proto
, size
, gop_handle
);
857 status
= setup_gop32(si
, proto
, size
, gop_handle
);
860 efi_call_early(free_pool
, gop_handle
);
865 setup_uga32(void **uga_handle
, unsigned long size
, u32
*width
, u32
*height
)
867 struct efi_uga_draw_protocol
*uga
= NULL
, *first_uga
;
868 efi_guid_t uga_proto
= EFI_UGA_PROTOCOL_GUID
;
869 unsigned long nr_ugas
;
870 u32
*handles
= (u32
*)uga_handle
;;
875 nr_ugas
= size
/ sizeof(u32
);
876 for (i
= 0; i
< nr_ugas
; i
++) {
877 efi_guid_t pciio_proto
= EFI_PCI_IO_PROTOCOL_GUID
;
878 u32 w
, h
, depth
, refresh
;
880 u32 handle
= handles
[i
];
882 status
= efi_call_early(handle_protocol
, handle
,
883 &uga_proto
, (void **)&uga
);
884 if (status
!= EFI_SUCCESS
)
887 efi_call_early(handle_protocol
, handle
, &pciio_proto
, &pciio
);
889 status
= efi_early
->call((unsigned long)uga
->get_mode
, uga
,
890 &w
, &h
, &depth
, &refresh
);
891 if (status
== EFI_SUCCESS
&& (!first_uga
|| pciio
)) {
896 * Once we've found a UGA supporting PCIIO,
897 * don't bother looking any further.
910 setup_uga64(void **uga_handle
, unsigned long size
, u32
*width
, u32
*height
)
912 struct efi_uga_draw_protocol
*uga
= NULL
, *first_uga
;
913 efi_guid_t uga_proto
= EFI_UGA_PROTOCOL_GUID
;
914 unsigned long nr_ugas
;
915 u64
*handles
= (u64
*)uga_handle
;;
920 nr_ugas
= size
/ sizeof(u64
);
921 for (i
= 0; i
< nr_ugas
; i
++) {
922 efi_guid_t pciio_proto
= EFI_PCI_IO_PROTOCOL_GUID
;
923 u32 w
, h
, depth
, refresh
;
925 u64 handle
= handles
[i
];
927 status
= efi_call_early(handle_protocol
, handle
,
928 &uga_proto
, (void **)&uga
);
929 if (status
!= EFI_SUCCESS
)
932 efi_call_early(handle_protocol
, handle
, &pciio_proto
, &pciio
);
934 status
= efi_early
->call((unsigned long)uga
->get_mode
, uga
,
935 &w
, &h
, &depth
, &refresh
);
936 if (status
== EFI_SUCCESS
&& (!first_uga
|| pciio
)) {
941 * Once we've found a UGA supporting PCIIO,
942 * don't bother looking any further.
955 * See if we have Universal Graphics Adapter (UGA) protocol
957 static efi_status_t
setup_uga(struct screen_info
*si
, efi_guid_t
*uga_proto
,
962 void **uga_handle
= NULL
;
964 status
= efi_call_early(allocate_pool
, EFI_LOADER_DATA
,
965 size
, (void **)&uga_handle
);
966 if (status
!= EFI_SUCCESS
)
969 status
= efi_call_early(locate_handle
,
970 EFI_LOCATE_BY_PROTOCOL
,
971 uga_proto
, NULL
, &size
, uga_handle
);
972 if (status
!= EFI_SUCCESS
)
979 status
= setup_uga64(uga_handle
, size
, &width
, &height
);
981 status
= setup_uga32(uga_handle
, size
, &width
, &height
);
983 if (!width
&& !height
)
986 /* EFI framebuffer */
987 si
->orig_video_isVGA
= VIDEO_TYPE_EFI
;
990 si
->lfb_width
= width
;
991 si
->lfb_height
= height
;
1003 efi_call_early(free_pool
, uga_handle
);
1007 void setup_graphics(struct boot_params
*boot_params
)
1009 efi_guid_t graphics_proto
= EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID
;
1010 struct screen_info
*si
;
1011 efi_guid_t uga_proto
= EFI_UGA_PROTOCOL_GUID
;
1012 efi_status_t status
;
1014 void **gop_handle
= NULL
;
1015 void **uga_handle
= NULL
;
1017 si
= &boot_params
->screen_info
;
1018 memset(si
, 0, sizeof(*si
));
1021 status
= efi_call_early(locate_handle
,
1022 EFI_LOCATE_BY_PROTOCOL
,
1023 &graphics_proto
, NULL
, &size
, gop_handle
);
1024 if (status
== EFI_BUFFER_TOO_SMALL
)
1025 status
= setup_gop(si
, &graphics_proto
, size
);
1027 if (status
!= EFI_SUCCESS
) {
1029 status
= efi_call_early(locate_handle
,
1030 EFI_LOCATE_BY_PROTOCOL
,
1031 &uga_proto
, NULL
, &size
, uga_handle
);
1032 if (status
== EFI_BUFFER_TOO_SMALL
)
1033 setup_uga(si
, &uga_proto
, size
);
1038 * Because the x86 boot code expects to be passed a boot_params we
1039 * need to create one ourselves (usually the bootloader would create
1042 * The caller is responsible for filling out ->code32_start in the
1043 * returned boot_params.
1045 struct boot_params
*make_boot_params(struct efi_config
*c
)
1047 struct boot_params
*boot_params
;
1048 struct apm_bios_info
*bi
;
1049 struct setup_header
*hdr
;
1050 struct efi_info
*efi
;
1051 efi_loaded_image_t
*image
;
1052 void *options
, *handle
;
1053 efi_guid_t proto
= LOADED_IMAGE_PROTOCOL_GUID
;
1054 int options_size
= 0;
1055 efi_status_t status
;
1060 unsigned long ramdisk_addr
;
1061 unsigned long ramdisk_size
;
1064 sys_table
= (efi_system_table_t
*)(unsigned long)efi_early
->table
;
1065 handle
= (void *)(unsigned long)efi_early
->image_handle
;
1067 /* Check if we were booted by the EFI firmware */
1068 if (sys_table
->hdr
.signature
!= EFI_SYSTEM_TABLE_SIGNATURE
)
1071 if (efi_early
->is64
)
1072 setup_boot_services64(efi_early
);
1074 setup_boot_services32(efi_early
);
1076 status
= efi_call_early(handle_protocol
, handle
,
1077 &proto
, (void *)&image
);
1078 if (status
!= EFI_SUCCESS
) {
1079 efi_printk(sys_table
, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
1083 status
= efi_low_alloc(sys_table
, 0x4000, 1,
1084 (unsigned long *)&boot_params
);
1085 if (status
!= EFI_SUCCESS
) {
1086 efi_printk(sys_table
, "Failed to alloc lowmem for boot params\n");
1090 memset(boot_params
, 0x0, 0x4000);
1092 hdr
= &boot_params
->hdr
;
1093 efi
= &boot_params
->efi_info
;
1094 bi
= &boot_params
->apm_bios_info
;
1096 /* Copy the second sector to boot_params */
1097 memcpy(&hdr
->jump
, image
->image_base
+ 512, 512);
1100 * Fill out some of the header fields ourselves because the
1101 * EFI firmware loader doesn't load the first sector.
1103 hdr
->root_flags
= 1;
1104 hdr
->vid_mode
= 0xffff;
1105 hdr
->boot_flag
= 0xAA55;
1107 hdr
->type_of_loader
= 0x21;
1109 /* Convert unicode cmdline to ascii */
1110 cmdline_ptr
= efi_convert_cmdline(sys_table
, image
, &options_size
);
1113 hdr
->cmd_line_ptr
= (unsigned long)cmdline_ptr
;
1114 /* Fill in upper bits of command line address, NOP on 32 bit */
1115 boot_params
->ext_cmd_line_ptr
= (u64
)(unsigned long)cmdline_ptr
>> 32;
1117 hdr
->ramdisk_image
= 0;
1118 hdr
->ramdisk_size
= 0;
1120 /* Clear APM BIOS info */
1121 memset(bi
, 0, sizeof(*bi
));
1123 status
= efi_parse_options(cmdline_ptr
);
1124 if (status
!= EFI_SUCCESS
)
1127 status
= handle_cmdline_files(sys_table
, image
,
1128 (char *)(unsigned long)hdr
->cmd_line_ptr
,
1129 "initrd=", hdr
->initrd_addr_max
,
1130 &ramdisk_addr
, &ramdisk_size
);
1132 if (status
!= EFI_SUCCESS
&&
1133 hdr
->xloadflags
& XLF_CAN_BE_LOADED_ABOVE_4G
) {
1134 efi_printk(sys_table
, "Trying to load files to higher address\n");
1135 status
= handle_cmdline_files(sys_table
, image
,
1136 (char *)(unsigned long)hdr
->cmd_line_ptr
,
1138 &ramdisk_addr
, &ramdisk_size
);
1141 if (status
!= EFI_SUCCESS
)
1143 hdr
->ramdisk_image
= ramdisk_addr
& 0xffffffff;
1144 hdr
->ramdisk_size
= ramdisk_size
& 0xffffffff;
1145 boot_params
->ext_ramdisk_image
= (u64
)ramdisk_addr
>> 32;
1146 boot_params
->ext_ramdisk_size
= (u64
)ramdisk_size
>> 32;
1150 efi_free(sys_table
, options_size
, hdr
->cmd_line_ptr
);
1152 efi_free(sys_table
, 0x4000, (unsigned long)boot_params
);
1156 static void add_e820ext(struct boot_params
*params
,
1157 struct setup_data
*e820ext
, u32 nr_entries
)
1159 struct setup_data
*data
;
1160 efi_status_t status
;
1163 e820ext
->type
= SETUP_E820_EXT
;
1164 e820ext
->len
= nr_entries
* sizeof(struct e820entry
);
1167 data
= (struct setup_data
*)(unsigned long)params
->hdr
.setup_data
;
1169 while (data
&& data
->next
)
1170 data
= (struct setup_data
*)(unsigned long)data
->next
;
1173 data
->next
= (unsigned long)e820ext
;
1175 params
->hdr
.setup_data
= (unsigned long)e820ext
;
1178 static efi_status_t
setup_e820(struct boot_params
*params
,
1179 struct setup_data
*e820ext
, u32 e820ext_size
)
1181 struct e820entry
*e820_map
= ¶ms
->e820_map
[0];
1182 struct efi_info
*efi
= ¶ms
->efi_info
;
1183 struct e820entry
*prev
= NULL
;
1189 nr_desc
= efi
->efi_memmap_size
/ efi
->efi_memdesc_size
;
1191 for (i
= 0; i
< nr_desc
; i
++) {
1192 efi_memory_desc_t
*d
;
1193 unsigned int e820_type
= 0;
1194 unsigned long m
= efi
->efi_memmap
;
1196 #ifdef CONFIG_X86_64
1197 m
|= (u64
)efi
->efi_memmap_hi
<< 32;
1200 d
= (efi_memory_desc_t
*)(m
+ (i
* efi
->efi_memdesc_size
));
1202 case EFI_RESERVED_TYPE
:
1203 case EFI_RUNTIME_SERVICES_CODE
:
1204 case EFI_RUNTIME_SERVICES_DATA
:
1205 case EFI_MEMORY_MAPPED_IO
:
1206 case EFI_MEMORY_MAPPED_IO_PORT_SPACE
:
1208 e820_type
= E820_RESERVED
;
1211 case EFI_UNUSABLE_MEMORY
:
1212 e820_type
= E820_UNUSABLE
;
1215 case EFI_ACPI_RECLAIM_MEMORY
:
1216 e820_type
= E820_ACPI
;
1219 case EFI_LOADER_CODE
:
1220 case EFI_LOADER_DATA
:
1221 case EFI_BOOT_SERVICES_CODE
:
1222 case EFI_BOOT_SERVICES_DATA
:
1223 case EFI_CONVENTIONAL_MEMORY
:
1224 e820_type
= E820_RAM
;
1227 case EFI_ACPI_MEMORY_NVS
:
1228 e820_type
= E820_NVS
;
1231 case EFI_PERSISTENT_MEMORY
:
1232 e820_type
= E820_PMEM
;
1239 /* Merge adjacent mappings */
1240 if (prev
&& prev
->type
== e820_type
&&
1241 (prev
->addr
+ prev
->size
) == d
->phys_addr
) {
1242 prev
->size
+= d
->num_pages
<< 12;
1246 if (nr_entries
== ARRAY_SIZE(params
->e820_map
)) {
1247 u32 need
= (nr_desc
- i
) * sizeof(struct e820entry
) +
1248 sizeof(struct setup_data
);
1250 if (!e820ext
|| e820ext_size
< need
)
1251 return EFI_BUFFER_TOO_SMALL
;
1253 /* boot_params map full, switch to e820 extended */
1254 e820_map
= (struct e820entry
*)e820ext
->data
;
1257 e820_map
->addr
= d
->phys_addr
;
1258 e820_map
->size
= d
->num_pages
<< PAGE_SHIFT
;
1259 e820_map
->type
= e820_type
;
1264 if (nr_entries
> ARRAY_SIZE(params
->e820_map
)) {
1265 u32 nr_e820ext
= nr_entries
- ARRAY_SIZE(params
->e820_map
);
1267 add_e820ext(params
, e820ext
, nr_e820ext
);
1268 nr_entries
-= nr_e820ext
;
1271 params
->e820_entries
= (u8
)nr_entries
;
1276 static efi_status_t
alloc_e820ext(u32 nr_desc
, struct setup_data
**e820ext
,
1279 efi_status_t status
;
1282 size
= sizeof(struct setup_data
) +
1283 sizeof(struct e820entry
) * nr_desc
;
1286 efi_call_early(free_pool
, *e820ext
);
1291 status
= efi_call_early(allocate_pool
, EFI_LOADER_DATA
,
1292 size
, (void **)e820ext
);
1293 if (status
== EFI_SUCCESS
)
1294 *e820ext_size
= size
;
1299 static efi_status_t
exit_boot(struct boot_params
*boot_params
,
1300 void *handle
, bool is64
)
1302 struct efi_info
*efi
= &boot_params
->efi_info
;
1303 unsigned long map_sz
, key
, desc_size
;
1304 efi_memory_desc_t
*mem_map
;
1305 struct setup_data
*e820ext
;
1306 const char *signature
;
1308 __u32 nr_desc
, prev_nr_desc
;
1309 efi_status_t status
;
1311 bool called_exit
= false;
1320 status
= efi_get_memory_map(sys_table
, &mem_map
, &map_sz
, &desc_size
,
1321 &desc_version
, &key
);
1323 if (status
!= EFI_SUCCESS
)
1326 prev_nr_desc
= nr_desc
;
1327 nr_desc
= map_sz
/ desc_size
;
1328 if (nr_desc
> prev_nr_desc
&&
1329 nr_desc
> ARRAY_SIZE(boot_params
->e820_map
)) {
1330 u32 nr_e820ext
= nr_desc
- ARRAY_SIZE(boot_params
->e820_map
);
1332 status
= alloc_e820ext(nr_e820ext
, &e820ext
, &e820ext_size
);
1333 if (status
!= EFI_SUCCESS
)
1336 efi_call_early(free_pool
, mem_map
);
1337 goto get_map
; /* Allocated memory, get map again */
1340 signature
= is64
? EFI64_LOADER_SIGNATURE
: EFI32_LOADER_SIGNATURE
;
1341 memcpy(&efi
->efi_loader_signature
, signature
, sizeof(__u32
));
1343 efi
->efi_systab
= (unsigned long)sys_table
;
1344 efi
->efi_memdesc_size
= desc_size
;
1345 efi
->efi_memdesc_version
= desc_version
;
1346 efi
->efi_memmap
= (unsigned long)mem_map
;
1347 efi
->efi_memmap_size
= map_sz
;
1349 #ifdef CONFIG_X86_64
1350 efi
->efi_systab_hi
= (unsigned long)sys_table
>> 32;
1351 efi
->efi_memmap_hi
= (unsigned long)mem_map
>> 32;
1354 /* Might as well exit boot services now */
1355 status
= efi_call_early(exit_boot_services
, handle
, key
);
1356 if (status
!= EFI_SUCCESS
) {
1358 * ExitBootServices() will fail if any of the event
1359 * handlers change the memory map. In which case, we
1360 * must be prepared to retry, but only once so that
1361 * we're guaranteed to exit on repeated failures instead
1362 * of spinning forever.
1368 efi_call_early(free_pool
, mem_map
);
1373 boot_params
->alt_mem_k
= 32 * 1024;
1375 status
= setup_e820(boot_params
, e820ext
, e820ext_size
);
1376 if (status
!= EFI_SUCCESS
)
1382 efi_call_early(free_pool
, mem_map
);
1387 * On success we return a pointer to a boot_params structure, and NULL
1390 struct boot_params
*efi_main(struct efi_config
*c
,
1391 struct boot_params
*boot_params
)
1393 struct desc_ptr
*gdt
= NULL
;
1394 efi_loaded_image_t
*image
;
1395 struct setup_header
*hdr
= &boot_params
->hdr
;
1396 efi_status_t status
;
1397 struct desc_struct
*desc
;
1399 efi_system_table_t
*_table
;
1404 _table
= (efi_system_table_t
*)(unsigned long)efi_early
->table
;
1405 handle
= (void *)(unsigned long)efi_early
->image_handle
;
1406 is64
= efi_early
->is64
;
1410 /* Check if we were booted by the EFI firmware */
1411 if (sys_table
->hdr
.signature
!= EFI_SYSTEM_TABLE_SIGNATURE
)
1415 setup_boot_services64(efi_early
);
1417 setup_boot_services32(efi_early
);
1419 setup_graphics(boot_params
);
1421 setup_efi_pci(boot_params
);
1423 status
= efi_call_early(allocate_pool
, EFI_LOADER_DATA
,
1424 sizeof(*gdt
), (void **)&gdt
);
1425 if (status
!= EFI_SUCCESS
) {
1426 efi_printk(sys_table
, "Failed to alloc mem for gdt structure\n");
1431 status
= efi_low_alloc(sys_table
, gdt
->size
, 8,
1432 (unsigned long *)&gdt
->address
);
1433 if (status
!= EFI_SUCCESS
) {
1434 efi_printk(sys_table
, "Failed to alloc mem for gdt\n");
1439 * If the kernel isn't already loaded at the preferred load
1440 * address, relocate it.
1442 if (hdr
->pref_address
!= hdr
->code32_start
) {
1443 unsigned long bzimage_addr
= hdr
->code32_start
;
1444 status
= efi_relocate_kernel(sys_table
, &bzimage_addr
,
1445 hdr
->init_size
, hdr
->init_size
,
1447 hdr
->kernel_alignment
);
1448 if (status
!= EFI_SUCCESS
) {
1449 efi_printk(sys_table
, "efi_relocate_kernel() failed!\n");
1453 hdr
->pref_address
= hdr
->code32_start
;
1454 hdr
->code32_start
= bzimage_addr
;
1457 status
= exit_boot(boot_params
, handle
, is64
);
1458 if (status
!= EFI_SUCCESS
) {
1459 efi_printk(sys_table
, "exit_boot() failed!\n");
1463 memset((char *)gdt
->address
, 0x0, gdt
->size
);
1464 desc
= (struct desc_struct
*)gdt
->address
;
1466 /* The first GDT is a dummy and the second is unused. */
1469 desc
->limit0
= 0xffff;
1470 desc
->base0
= 0x0000;
1471 desc
->base1
= 0x0000;
1472 desc
->type
= SEG_TYPE_CODE
| SEG_TYPE_EXEC_READ
;
1473 desc
->s
= DESC_TYPE_CODE_DATA
;
1479 desc
->d
= SEG_OP_SIZE_32BIT
;
1480 desc
->g
= SEG_GRANULARITY_4KB
;
1484 desc
->limit0
= 0xffff;
1485 desc
->base0
= 0x0000;
1486 desc
->base1
= 0x0000;
1487 desc
->type
= SEG_TYPE_DATA
| SEG_TYPE_READ_WRITE
;
1488 desc
->s
= DESC_TYPE_CODE_DATA
;
1494 desc
->d
= SEG_OP_SIZE_32BIT
;
1495 desc
->g
= SEG_GRANULARITY_4KB
;
1498 #ifdef CONFIG_X86_64
1499 /* Task segment value */
1501 desc
->limit0
= 0x0000;
1502 desc
->base0
= 0x0000;
1503 desc
->base1
= 0x0000;
1504 desc
->type
= SEG_TYPE_TSS
;
1512 desc
->g
= SEG_GRANULARITY_4KB
;
1514 #endif /* CONFIG_X86_64 */
1516 asm volatile("cli");
1517 asm volatile ("lgdt %0" : : "m" (*gdt
));
1521 efi_printk(sys_table
, "efi_main() failed!\n");