2 * Copyright (c) 2013 The FreeBSD Foundation
4 * This software was developed by Benno Rice under sponsorship from
5 * the FreeBSD Foundation.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 #include <bootstrap.h>
30 #include <sys/endian.h>
31 #include <sys/param.h>
38 #include <Protocol/EdidActive.h>
39 #include <Protocol/EdidDiscovered.h>
40 #include <machine/metadata.h>
42 #include "bootstrap.h"
43 #include "framebuffer.h"
45 static EFI_GUID conout_guid = EFI_CONSOLE_OUT_DEVICE_GUID;
46 EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
47 static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID;
48 static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID;
49 static EFI_GUID active_edid_guid = EFI_EDID_ACTIVE_PROTOCOL_GUID;
50 static EFI_GUID discovered_edid_guid = EFI_EDID_DISCOVERED_PROTOCOL_GUID;
51 static EFI_HANDLE gop_handle;
54 struct vesa_edid_info *edid_info = NULL;
56 static EFI_GRAPHICS_OUTPUT *gop;
57 static EFI_UGA_DRAW_PROTOCOL *uga;
59 static struct named_resolution {
94 efifb_color_depth(struct efi_fb *efifb)
99 mask = efifb->fb_mask_red | efifb->fb_mask_green |
100 efifb->fb_mask_blue | efifb->fb_mask_reserved;
103 for (depth = 1; mask != 1; depth++)
109 efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
110 EFI_PIXEL_BITMASK *pixinfo)
116 case PixelRedGreenBlueReserved8BitPerColor:
118 efifb->fb_mask_red = 0x000000ff;
119 efifb->fb_mask_green = 0x0000ff00;
120 efifb->fb_mask_blue = 0x00ff0000;
121 efifb->fb_mask_reserved = 0xff000000;
123 case PixelBlueGreenRedReserved8BitPerColor:
124 efifb->fb_mask_red = 0x00ff0000;
125 efifb->fb_mask_green = 0x0000ff00;
126 efifb->fb_mask_blue = 0x000000ff;
127 efifb->fb_mask_reserved = 0xff000000;
130 efifb->fb_mask_red = pixinfo->RedMask;
131 efifb->fb_mask_green = pixinfo->GreenMask;
132 efifb->fb_mask_blue = pixinfo->BlueMask;
133 efifb->fb_mask_reserved = pixinfo->ReservedMask;
143 efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
144 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
148 efifb->fb_addr = mode->FrameBufferBase;
149 efifb->fb_size = mode->FrameBufferSize;
150 efifb->fb_height = info->VerticalResolution;
151 efifb->fb_width = info->HorizontalResolution;
152 efifb->fb_stride = info->PixelsPerScanLine;
153 result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
154 &info->PixelInformation);
159 efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
160 EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
162 EFI_UGA_PIXEL pix0, pix1;
163 uint8_t *data1, *data2;
164 size_t count, maxcount = 1024;
169 status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
170 0, line, 0, 0, 1, 1, 0);
171 if (EFI_ERROR(status)) {
172 printf("UGA BLT operation failed (video->buffer)");
175 pix1.Red = ~pix0.Red;
176 pix1.Green = ~pix0.Green;
177 pix1.Blue = ~pix0.Blue;
180 data1 = calloc(maxcount, 2);
182 printf("Unable to allocate memory");
185 data2 = data1 + maxcount;
189 count = min(size, maxcount);
191 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
192 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
194 if (EFI_ERROR(status)) {
195 printf("Error reading frame buffer (before)");
198 status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
199 0, 0, 0, line, 1, 1, 0);
200 if (EFI_ERROR(status)) {
201 printf("UGA BLT operation failed (modify)");
204 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
205 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
207 if (EFI_ERROR(status)) {
208 printf("Error reading frame buffer (after)");
211 status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
212 0, 0, 0, line, 1, 1, 0);
213 if (EFI_ERROR(status)) {
214 printf("UGA BLT operation failed (restore)");
217 for (idx = 0; idx < count; idx++) {
218 if (data1[idx] != data2[idx]) {
220 return (ofs + (idx & ~3));
226 printf("No change detected in frame buffer");
229 printf(" -- error %lu\n", EFI_ERROR_CODE(status));
234 static EFI_PCI_IO_PROTOCOL *
235 efifb_uga_get_pciio(void)
237 EFI_PCI_IO_PROTOCOL *pciio;
238 EFI_HANDLE *buf, *hp;
242 /* Get all handles that support the UGA protocol. */
244 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
245 if (status != EFI_BUFFER_TOO_SMALL)
248 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
249 if (status != EFI_SUCCESS) {
253 bufsz /= sizeof(EFI_HANDLE);
255 /* Get the PCI I/O interface of the first handle that supports it. */
257 for (hp = buf; hp < buf + bufsz; hp++) {
258 status = OpenProtocolByHandle(*hp, &pciio_guid,
260 if (status == EFI_SUCCESS) {
270 efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
279 return (EFI_DEVICE_ERROR);
281 /* Attempt to get the frame buffer address (imprecise). */
284 for (bar = 0; bar < 6; bar++) {
285 status = pciio->GetBarAttributes(pciio, bar, NULL,
287 if (status != EFI_SUCCESS)
289 /* XXX magic offsets and constants. */
290 if (resattr[0] == 0x87 && resattr[3] == 0) {
291 /* 32-bit address space descriptor (MEMIO) */
292 addr = le32dec(resattr + 10);
293 size = le32dec(resattr + 22);
294 } else if (resattr[0] == 0x8a && resattr[3] == 0) {
295 /* 64-bit address space descriptor (MEMIO) */
296 addr = le64dec(resattr + 14);
297 size = le64dec(resattr + 38);
302 BS->FreePool(resattr);
303 if (addr == 0 || size == 0)
306 /* We assume the largest BAR is the frame buffer. */
312 return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
316 efifb_from_uga(struct efi_fb *efifb)
318 EFI_PCI_IO_PROTOCOL *pciio;
323 uint32_t horiz, vert, stride;
324 uint32_t np, depth, refresh;
326 status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
327 if (EFI_ERROR(status))
329 efifb->fb_height = vert;
330 efifb->fb_width = horiz;
332 if (efifb->fb_height == 0 || efifb->fb_width == 0)
335 /* The color masks are fixed AFAICT. */
336 efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
339 /* pciio can be NULL on return! */
340 pciio = efifb_uga_get_pciio();
342 /* Try to find the frame buffer. */
343 status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
345 if (EFI_ERROR(status)) {
351 * There's no reliable way to detect the frame buffer or the
352 * offset within the frame buffer of the visible region, nor
353 * the stride. Our only option is to look at the system and
354 * fill in the blanks based on that. Luckily, UGA was mostly
355 * only used on Apple hardware.
358 ev = getenv("smbios.system.maker");
359 if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
360 ev = getenv("smbios.system.product");
361 if (ev != NULL && !strcmp(ev, "iMac7,1")) {
362 /* These are the expected values we should have. */
366 /* These are the missing bits. */
369 } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
370 /* These are the expected values we should have. */
374 /* These are the missing bits. */
381 * If this is hardware we know, make sure that it looks familiar
382 * before we accept our hardcoded values.
384 if (offset >= 0 && efifb->fb_width == horiz &&
385 efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
386 efifb->fb_addr += offset;
387 efifb->fb_size -= offset;
388 efifb->fb_stride = stride;
390 } else if (offset >= 0) {
391 printf("Hardware make/model known, but graphics not "
393 printf("Console may not work!\n");
397 * The stride is equal or larger to the width. Often it's the
398 * next larger power of two. We'll start with that...
400 efifb->fb_stride = efifb->fb_width;
402 np = efifb->fb_stride & (efifb->fb_stride - 1);
404 efifb->fb_stride |= (np - 1);
409 ev = getenv("hw.efifb.address");
411 if (efifb->fb_addr == 0) {
412 printf("Please set hw.efifb.address and "
413 "hw.efifb.stride.\n");
418 * The visible part of the frame buffer may not start at
419 * offset 0, so try to detect it. Note that we may not
420 * always be able to read from the frame buffer, which
421 * means that we may not be able to detect anything. In
422 * that case, we would take a long time scanning for a
423 * pixel change in the frame buffer, which would have it
424 * appear that we're hanging, so we limit the scan to
425 * 1/256th of the frame buffer. This number is mostly
426 * based on PR 202730 and the fact that on a MacBoook,
427 * where we can't read from the frame buffer the offset
428 * of the visible region is 0. In short: we want to scan
429 * enough to handle all adapters that have an offset
430 * larger than 0 and we want to scan as little as we can
431 * to not appear to hang when we can't read from the
434 offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
435 efifb->fb_size >> 8);
437 printf("Unable to reliably detect frame buffer.\n");
438 } else if (offset > 0) {
439 efifb->fb_addr += offset;
440 efifb->fb_size -= offset;
444 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
445 efifb->fb_addr = strtoul(ev, &p, 0);
450 ev = getenv("hw.efifb.stride");
452 if (pciio != NULL && offset != -1) {
453 /* Determine the stride. */
454 offset = efifb_uga_find_pixel(uga, 1, pciio,
455 efifb->fb_addr, horiz * 8);
457 efifb->fb_stride = offset >> 2;
459 printf("Unable to reliably detect the stride.\n");
462 efifb->fb_stride = strtoul(ev, &p, 0);
468 * We finalized on the stride, so recalculate the size of the
471 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
476 * Fetch EDID info. Caller must free the buffer.
478 static struct vesa_edid_info *
479 efifb_gop_get_edid(EFI_HANDLE h)
481 const uint8_t magic[] = EDID_MAGIC;
482 EFI_EDID_ACTIVE_PROTOCOL *edid;
483 struct vesa_edid_info *edid_infop;
488 guid = &active_edid_guid;
489 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
490 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
491 if (status != EFI_SUCCESS ||
492 edid->SizeOfEdid == 0) {
493 guid = &discovered_edid_guid;
494 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
495 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
496 if (status != EFI_SUCCESS ||
497 edid->SizeOfEdid == 0)
501 size = MAX(sizeof(*edid_infop), edid->SizeOfEdid);
503 edid_infop = calloc(1, size);
504 if (edid_infop == NULL)
507 memcpy(edid_infop, edid->Edid, edid->SizeOfEdid);
510 if (memcmp(edid_infop, magic, sizeof (magic)) != 0)
513 if (edid_infop->header.version != 1)
523 efifb_get_edid(edid_res_list_t *res)
527 if (edid_info == NULL)
528 edid_info = efifb_gop_get_edid(gop_handle);
530 if (edid_info != NULL)
531 rv = gfx_get_edid_resolution(edid_info, res);
545 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
547 return (status == EFI_BUFFER_TOO_SMALL);
552 efi_find_framebuffer(teken_gfx_t *gfx_state)
555 UINTN nhandles, i, hsize;
560 gfx_state->tg_fb_type = FB_TEXT;
564 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
565 if (status == EFI_BUFFER_TOO_SMALL) {
566 hlist = malloc(hsize);
569 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize,
571 if (EFI_ERROR(status))
574 if (EFI_ERROR(status))
575 return (efi_status_to_errno(status));
577 nhandles = hsize / sizeof(*hlist);
580 * Search for ConOut protocol, if not found, use first handle.
583 for (i = 0; i < nhandles; i++) {
584 EFI_GRAPHICS_OUTPUT *tgop;
587 status = OpenProtocolByHandle(hlist[i], &gop_guid, (void **)&tgop);
588 if (status != EFI_SUCCESS)
591 if (tgop->Mode->Info->PixelFormat == PixelBltOnly ||
592 tgop->Mode->Info->PixelFormat >= PixelFormatMax)
595 status = OpenProtocolByHandle(hlist[i], &conout_guid, &dummy);
596 if (status == EFI_SUCCESS) {
597 gop_handle = hlist[i];
600 } else if (gop_handle == NULL) {
601 gop_handle = hlist[i];
608 if (gop_handle != NULL) {
609 gfx_state->tg_fb_type = FB_GOP;
610 gfx_state->tg_private = gop;
611 if (edid_info == NULL)
612 edid_info = efifb_gop_get_edid(gop_handle);
614 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
615 if (status == EFI_SUCCESS) {
616 gfx_state->tg_fb_type = FB_UGA;
617 gfx_state->tg_private = uga;
623 switch (gfx_state->tg_fb_type) {
625 rv = efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
629 rv = efifb_from_uga(&efifb);
636 gfx_state->tg_fb.fb_addr = efifb.fb_addr;
637 gfx_state->tg_fb.fb_size = efifb.fb_size;
638 gfx_state->tg_fb.fb_height = efifb.fb_height;
639 gfx_state->tg_fb.fb_width = efifb.fb_width;
640 gfx_state->tg_fb.fb_stride = efifb.fb_stride;
641 gfx_state->tg_fb.fb_mask_red = efifb.fb_mask_red;
642 gfx_state->tg_fb.fb_mask_green = efifb.fb_mask_green;
643 gfx_state->tg_fb.fb_mask_blue = efifb.fb_mask_blue;
644 gfx_state->tg_fb.fb_mask_reserved = efifb.fb_mask_reserved;
646 gfx_state->tg_fb.fb_bpp = fls(efifb.fb_mask_red | efifb.fb_mask_green |
647 efifb.fb_mask_blue | efifb.fb_mask_reserved);
649 if (gfx_state->tg_shadow_fb != NULL)
650 BS->FreePages((EFI_PHYSICAL_ADDRESS)gfx_state->tg_shadow_fb,
651 gfx_state->tg_shadow_sz);
652 gfx_state->tg_shadow_sz =
653 EFI_SIZE_TO_PAGES(efifb.fb_height * efifb.fb_width *
654 sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
655 status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData,
656 gfx_state->tg_shadow_sz,
657 (EFI_PHYSICAL_ADDRESS *)&gfx_state->tg_shadow_fb);
658 if (status != EFI_SUCCESS)
659 gfx_state->tg_shadow_fb = NULL;
665 print_efifb(int mode, struct efi_fb *efifb, int verbose)
670 printf("mode %d: ", mode);
671 depth = efifb_color_depth(efifb);
672 printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
673 depth, efifb->fb_stride);
675 printf("\n frame buffer: address=%jx, size=%jx",
676 (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
677 printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
678 efifb->fb_mask_red, efifb->fb_mask_green,
679 efifb->fb_mask_blue);
684 efi_resolution_compare(struct named_resolution *res, const char *cmp)
687 if (strcasecmp(res->name, cmp) == 0)
689 if (res->alias != NULL && strcasecmp(res->alias, cmp) == 0)
696 efi_get_max_resolution(int *width, int *height)
698 struct named_resolution *res;
700 char *height_start, *width_start;
703 *width = *height = 0;
704 maxres = getenv("efi_max_resolution");
705 /* No max_resolution set? Bail out; choose highest resolution */
708 /* See if it matches one of our known resolutions */
709 for (idx = 0; idx < nitems(resolutions); ++idx) {
710 res = &resolutions[idx];
711 if (efi_resolution_compare(res, maxres)) {
713 *height = res->height;
717 /* Not a known resolution, try to parse it; make a copy we can modify */
718 maxres = strdup(maxres);
721 height_start = strchr(maxres, 'x');
722 if (height_start == NULL) {
726 width_start = maxres;
728 /* Errors from this will effectively mean "no max" */
729 *width = (int)strtol(width_start, NULL, 0);
730 *height = (int)strtol(height_start, NULL, 0);
738 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
741 UINT32 best_mode, currdim, maxdim, mode;
742 int height, max_height, max_width, width;
744 best_mode = maxdim = 0;
745 efi_get_max_resolution(&max_width, &max_height);
746 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
747 status = gop->QueryMode(gop, mode, &infosz, &info);
748 if (EFI_ERROR(status))
750 efifb_from_gop(&efifb, gop->Mode, info);
751 width = info->HorizontalResolution;
752 height = info->VerticalResolution;
753 currdim = width * height;
754 if (currdim > maxdim) {
755 if ((max_width != 0 && width > max_width) ||
756 (max_height != 0 && height > max_height))
764 status = gop->SetMode(gop, best_mode);
765 if (EFI_ERROR(status)) {
766 snprintf(command_errbuf, sizeof(command_errbuf),
767 "gop_autoresize: Unable to set mode to %u (error=%lu)",
768 mode, EFI_ERROR_CODE(status));
771 (void) cons_update_mode(true);
779 SIMPLE_TEXT_OUTPUT_INTERFACE *conout;
781 UINTN i, max_dim, best_mode, cols, rows;
784 max_dim = best_mode = 0;
785 for (i = 0; i < conout->Mode->MaxMode; i++) {
786 status = conout->QueryMode(conout, i, &cols, &rows);
787 if (EFI_ERROR(status))
789 if (cols * rows > max_dim) {
790 max_dim = cols * rows;
795 conout->SetMode(conout, best_mode);
796 (void) cons_update_mode(true);
804 return (text_autoresize());
807 COMMAND_SET(efi_autoresize, "efi-autoresizecons", "EFI Auto-resize Console", command_autoresize);
810 command_autoresize(int argc, char *argv[])
814 textmode = getenv("hw.vga.textmode");
815 /* If it's set and non-zero, we'll select a console mode instead */
816 if (textmode != NULL && strcmp(textmode, "0") != 0)
817 return (text_autoresize());
820 return (gop_autoresize());
823 return (uga_autoresize());
825 snprintf(command_errbuf, sizeof(command_errbuf),
826 "%s: Neither Graphics Output Protocol nor Universal Graphics Adapter present",
830 * Default to text_autoresize if we have neither GOP or UGA. This won't
831 * give us the most ideal resolution, but it will at least leave us
832 * functional rather than failing the boot for an objectively bad
835 return (text_autoresize());
838 COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
841 command_gop(int argc, char *argv[])
848 snprintf(command_errbuf, sizeof(command_errbuf),
849 "%s: Graphics Output Protocol not present", argv[0]);
856 if (!strcmp(argv[1], "set")) {
861 mode = strtol(argv[2], &cp, 0);
863 sprintf(command_errbuf, "mode is an integer");
866 status = gop->SetMode(gop, mode);
867 if (EFI_ERROR(status)) {
868 snprintf(command_errbuf, sizeof(command_errbuf),
869 "%s: Unable to set mode to %u (error=%lu)",
870 argv[0], mode, EFI_ERROR_CODE(status));
873 (void) cons_update_mode(true);
874 } else if (strcmp(argv[1], "off") == 0) {
875 (void) cons_update_mode(false);
876 } else if (strcmp(argv[1], "get") == 0) {
882 efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
883 if (efifb_get_edid(&res)) {
884 struct resolution *rp;
887 while ((rp = TAILQ_FIRST(&res)) != NULL) {
888 printf(" %dx%d", rp->width, rp->height);
889 TAILQ_REMOVE(&res, rp, next);
894 printf("no EDID information\n");
896 print_efifb(gop->Mode->Mode, &efifb, 1);
898 } else if (!strcmp(argv[1], "list")) {
899 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
906 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
907 status = gop->QueryMode(gop, mode, &infosz, &info);
908 if (EFI_ERROR(status))
910 efifb_from_gop(&efifb, gop->Mode, info);
911 print_efifb(mode, &efifb, 0);
912 if (pager_output("\n"))
920 snprintf(command_errbuf, sizeof(command_errbuf),
921 "usage: %s [list | get | set <mode> | off]", argv[0]);
925 COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
928 command_uga(int argc, char *argv[])
933 snprintf(command_errbuf, sizeof(command_errbuf),
934 "%s: UGA Protocol not present", argv[0]);
941 if (efifb_from_uga(&efifb) != CMD_OK) {
942 snprintf(command_errbuf, sizeof(command_errbuf),
943 "%s: Unable to get UGA information", argv[0]);
947 print_efifb(-1, &efifb, 1);
952 snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);