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 {
99 efifb_color_depth(struct efi_fb *efifb)
104 mask = efifb->fb_mask_red | efifb->fb_mask_green |
105 efifb->fb_mask_blue | efifb->fb_mask_reserved;
108 for (depth = 1; mask != 1; depth++)
114 efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
115 EFI_PIXEL_BITMASK *pixinfo)
121 case PixelRedGreenBlueReserved8BitPerColor:
123 efifb->fb_mask_red = 0x000000ff;
124 efifb->fb_mask_green = 0x0000ff00;
125 efifb->fb_mask_blue = 0x00ff0000;
126 efifb->fb_mask_reserved = 0xff000000;
128 case PixelBlueGreenRedReserved8BitPerColor:
129 efifb->fb_mask_red = 0x00ff0000;
130 efifb->fb_mask_green = 0x0000ff00;
131 efifb->fb_mask_blue = 0x000000ff;
132 efifb->fb_mask_reserved = 0xff000000;
135 efifb->fb_mask_red = pixinfo->RedMask;
136 efifb->fb_mask_green = pixinfo->GreenMask;
137 efifb->fb_mask_blue = pixinfo->BlueMask;
138 efifb->fb_mask_reserved = pixinfo->ReservedMask;
148 efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
149 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
153 efifb->fb_addr = mode->FrameBufferBase;
154 efifb->fb_size = mode->FrameBufferSize;
155 efifb->fb_height = info->VerticalResolution;
156 efifb->fb_width = info->HorizontalResolution;
157 efifb->fb_stride = info->PixelsPerScanLine;
158 result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
159 &info->PixelInformation);
164 efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
165 EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
167 EFI_UGA_PIXEL pix0, pix1;
168 uint8_t *data1, *data2;
169 size_t count, maxcount = 1024;
174 status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
175 0, line, 0, 0, 1, 1, 0);
176 if (EFI_ERROR(status)) {
177 printf("UGA BLT operation failed (video->buffer)");
180 pix1.Red = ~pix0.Red;
181 pix1.Green = ~pix0.Green;
182 pix1.Blue = ~pix0.Blue;
185 data1 = calloc(maxcount, 2);
187 printf("Unable to allocate memory");
190 data2 = data1 + maxcount;
194 count = min(size, maxcount);
196 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
197 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
199 if (EFI_ERROR(status)) {
200 printf("Error reading frame buffer (before)");
203 status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
204 0, 0, 0, line, 1, 1, 0);
205 if (EFI_ERROR(status)) {
206 printf("UGA BLT operation failed (modify)");
209 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
210 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
212 if (EFI_ERROR(status)) {
213 printf("Error reading frame buffer (after)");
216 status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
217 0, 0, 0, line, 1, 1, 0);
218 if (EFI_ERROR(status)) {
219 printf("UGA BLT operation failed (restore)");
222 for (idx = 0; idx < count; idx++) {
223 if (data1[idx] != data2[idx]) {
225 return (ofs + (idx & ~3));
231 printf("No change detected in frame buffer");
234 printf(" -- error %lu\n", EFI_ERROR_CODE(status));
239 static EFI_PCI_IO_PROTOCOL *
240 efifb_uga_get_pciio(void)
242 EFI_PCI_IO_PROTOCOL *pciio;
243 EFI_HANDLE *buf, *hp;
247 /* Get all handles that support the UGA protocol. */
249 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
250 if (status != EFI_BUFFER_TOO_SMALL)
253 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
254 if (status != EFI_SUCCESS) {
258 bufsz /= sizeof(EFI_HANDLE);
260 /* Get the PCI I/O interface of the first handle that supports it. */
262 for (hp = buf; hp < buf + bufsz; hp++) {
263 status = OpenProtocolByHandle(*hp, &pciio_guid,
265 if (status == EFI_SUCCESS) {
275 efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
284 return (EFI_DEVICE_ERROR);
286 /* Attempt to get the frame buffer address (imprecise). */
289 for (bar = 0; bar < 6; bar++) {
290 status = pciio->GetBarAttributes(pciio, bar, NULL,
292 if (status != EFI_SUCCESS)
294 /* XXX magic offsets and constants. */
295 if (resattr[0] == 0x87 && resattr[3] == 0) {
296 /* 32-bit address space descriptor (MEMIO) */
297 addr = le32dec(resattr + 10);
298 size = le32dec(resattr + 22);
299 } else if (resattr[0] == 0x8a && resattr[3] == 0) {
300 /* 64-bit address space descriptor (MEMIO) */
301 addr = le64dec(resattr + 14);
302 size = le64dec(resattr + 38);
307 BS->FreePool(resattr);
308 if (addr == 0 || size == 0)
311 /* We assume the largest BAR is the frame buffer. */
317 return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
321 efifb_from_uga(struct efi_fb *efifb)
323 EFI_PCI_IO_PROTOCOL *pciio;
328 uint32_t horiz, vert, stride;
329 uint32_t np, depth, refresh;
331 status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
332 if (EFI_ERROR(status))
334 efifb->fb_height = vert;
335 efifb->fb_width = horiz;
337 if (efifb->fb_height == 0 || efifb->fb_width == 0)
340 /* The color masks are fixed AFAICT. */
341 efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
344 /* pciio can be NULL on return! */
345 pciio = efifb_uga_get_pciio();
347 /* Try to find the frame buffer. */
348 status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
350 if (EFI_ERROR(status)) {
356 * There's no reliable way to detect the frame buffer or the
357 * offset within the frame buffer of the visible region, nor
358 * the stride. Our only option is to look at the system and
359 * fill in the blanks based on that. Luckily, UGA was mostly
360 * only used on Apple hardware.
363 ev = getenv("smbios.system.maker");
364 if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
365 ev = getenv("smbios.system.product");
366 if (ev != NULL && !strcmp(ev, "iMac7,1")) {
367 /* These are the expected values we should have. */
371 /* These are the missing bits. */
374 } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
375 /* These are the expected values we should have. */
379 /* These are the missing bits. */
386 * If this is hardware we know, make sure that it looks familiar
387 * before we accept our hardcoded values.
389 if (offset >= 0 && efifb->fb_width == horiz &&
390 efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
391 efifb->fb_addr += offset;
392 efifb->fb_size -= offset;
393 efifb->fb_stride = stride;
395 } else if (offset >= 0) {
396 printf("Hardware make/model known, but graphics not "
398 printf("Console may not work!\n");
402 * The stride is equal or larger to the width. Often it's the
403 * next larger power of two. We'll start with that...
405 efifb->fb_stride = efifb->fb_width;
407 np = efifb->fb_stride & (efifb->fb_stride - 1);
409 efifb->fb_stride |= (np - 1);
414 ev = getenv("hw.efifb.address");
416 if (efifb->fb_addr == 0) {
417 printf("Please set hw.efifb.address and "
418 "hw.efifb.stride.\n");
423 * The visible part of the frame buffer may not start at
424 * offset 0, so try to detect it. Note that we may not
425 * always be able to read from the frame buffer, which
426 * means that we may not be able to detect anything. In
427 * that case, we would take a long time scanning for a
428 * pixel change in the frame buffer, which would have it
429 * appear that we're hanging, so we limit the scan to
430 * 1/256th of the frame buffer. This number is mostly
431 * based on PR 202730 and the fact that on a MacBoook,
432 * where we can't read from the frame buffer the offset
433 * of the visible region is 0. In short: we want to scan
434 * enough to handle all adapters that have an offset
435 * larger than 0 and we want to scan as little as we can
436 * to not appear to hang when we can't read from the
439 offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
440 efifb->fb_size >> 8);
442 printf("Unable to reliably detect frame buffer.\n");
443 } else if (offset > 0) {
444 efifb->fb_addr += offset;
445 efifb->fb_size -= offset;
449 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
450 efifb->fb_addr = strtoul(ev, &p, 0);
455 ev = getenv("hw.efifb.stride");
457 if (pciio != NULL && offset != -1) {
458 /* Determine the stride. */
459 offset = efifb_uga_find_pixel(uga, 1, pciio,
460 efifb->fb_addr, horiz * 8);
462 efifb->fb_stride = offset >> 2;
464 printf("Unable to reliably detect the stride.\n");
467 efifb->fb_stride = strtoul(ev, &p, 0);
473 * We finalized on the stride, so recalculate the size of the
476 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
481 * Fetch EDID info. Caller must free the buffer.
483 static struct vesa_edid_info *
484 efifb_gop_get_edid(EFI_HANDLE h)
486 const uint8_t magic[] = EDID_MAGIC;
487 EFI_EDID_ACTIVE_PROTOCOL *edid;
488 struct vesa_edid_info *edid_infop;
493 guid = &active_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) {
498 guid = &discovered_edid_guid;
499 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
500 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
501 if (status != EFI_SUCCESS ||
502 edid->SizeOfEdid == 0)
506 size = MAX(sizeof(*edid_infop), edid->SizeOfEdid);
508 edid_infop = calloc(1, size);
509 if (edid_infop == NULL)
512 memcpy(edid_infop, edid->Edid, edid->SizeOfEdid);
515 if (memcmp(edid_infop, magic, sizeof (magic)) != 0)
518 if (edid_infop->header.version != 1)
528 efifb_get_edid(edid_res_list_t *res)
532 if (edid_info == NULL)
533 edid_info = efifb_gop_get_edid(gop_handle);
535 if (edid_info != NULL)
536 rv = gfx_get_edid_resolution(edid_info, res);
550 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
552 return (status == EFI_BUFFER_TOO_SMALL);
557 efi_find_framebuffer(teken_gfx_t *gfx_state)
560 UINTN nhandles, i, hsize;
565 gfx_state->tg_fb_type = FB_TEXT;
569 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
570 if (status == EFI_BUFFER_TOO_SMALL) {
571 hlist = malloc(hsize);
574 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize,
576 if (EFI_ERROR(status))
579 if (EFI_ERROR(status))
580 return (efi_status_to_errno(status));
582 nhandles = hsize / sizeof(*hlist);
585 * Search for ConOut protocol, if not found, use first handle.
588 for (i = 0; i < nhandles; i++) {
589 EFI_GRAPHICS_OUTPUT *tgop;
592 status = OpenProtocolByHandle(hlist[i], &gop_guid, (void **)&tgop);
593 if (status != EFI_SUCCESS)
596 if (tgop->Mode->Info->PixelFormat == PixelBltOnly ||
597 tgop->Mode->Info->PixelFormat >= PixelFormatMax)
600 status = OpenProtocolByHandle(hlist[i], &conout_guid, &dummy);
601 if (status == EFI_SUCCESS) {
602 gop_handle = hlist[i];
605 } else if (gop_handle == NULL) {
606 gop_handle = hlist[i];
613 if (gop_handle != NULL) {
614 gfx_state->tg_fb_type = FB_GOP;
615 gfx_state->tg_private = gop;
616 if (edid_info == NULL)
617 edid_info = efifb_gop_get_edid(gop_handle);
619 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
620 if (status == EFI_SUCCESS) {
621 gfx_state->tg_fb_type = FB_UGA;
622 gfx_state->tg_private = uga;
628 switch (gfx_state->tg_fb_type) {
630 rv = efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
634 rv = efifb_from_uga(&efifb);
641 gfx_state->tg_fb.fb_addr = efifb.fb_addr;
642 gfx_state->tg_fb.fb_size = efifb.fb_size;
643 gfx_state->tg_fb.fb_height = efifb.fb_height;
644 gfx_state->tg_fb.fb_width = efifb.fb_width;
645 gfx_state->tg_fb.fb_stride = efifb.fb_stride;
646 gfx_state->tg_fb.fb_mask_red = efifb.fb_mask_red;
647 gfx_state->tg_fb.fb_mask_green = efifb.fb_mask_green;
648 gfx_state->tg_fb.fb_mask_blue = efifb.fb_mask_blue;
649 gfx_state->tg_fb.fb_mask_reserved = efifb.fb_mask_reserved;
651 gfx_state->tg_fb.fb_bpp = fls(efifb.fb_mask_red | efifb.fb_mask_green |
652 efifb.fb_mask_blue | efifb.fb_mask_reserved);
654 if (gfx_state->tg_shadow_fb != NULL)
655 BS->FreePages((EFI_PHYSICAL_ADDRESS)gfx_state->tg_shadow_fb,
656 gfx_state->tg_shadow_sz);
657 gfx_state->tg_shadow_sz =
658 EFI_SIZE_TO_PAGES(efifb.fb_height * efifb.fb_width *
659 sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
660 status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData,
661 gfx_state->tg_shadow_sz,
662 (EFI_PHYSICAL_ADDRESS *)&gfx_state->tg_shadow_fb);
663 if (status != EFI_SUCCESS)
664 gfx_state->tg_shadow_fb = NULL;
670 print_efifb(int mode, struct efi_fb *efifb, int verbose)
675 printf("mode %d: ", mode);
676 depth = efifb_color_depth(efifb);
677 printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
678 depth, efifb->fb_stride);
680 printf("\n frame buffer: address=%jx, size=%jx",
681 (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
682 printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
683 efifb->fb_mask_red, efifb->fb_mask_green,
684 efifb->fb_mask_blue);
689 efi_resolution_compare(struct named_resolution *res, const char *cmp)
692 if (strcasecmp(res->name, cmp) == 0)
694 if (res->alias != NULL && strcasecmp(res->alias, cmp) == 0)
701 efi_get_max_resolution(int *width, int *height)
703 struct named_resolution *res;
705 char *height_start, *width_start;
708 *width = *height = 0;
709 maxres = getenv("efi_max_resolution");
710 /* No max_resolution set? Bail out; choose highest resolution */
713 /* See if it matches one of our known resolutions */
714 for (idx = 0; idx < nitems(resolutions); ++idx) {
715 res = &resolutions[idx];
716 if (efi_resolution_compare(res, maxres)) {
718 *height = res->height;
722 /* Not a known resolution, try to parse it; make a copy we can modify */
723 maxres = strdup(maxres);
726 height_start = strchr(maxres, 'x');
727 if (height_start == NULL) {
731 width_start = maxres;
733 /* Errors from this will effectively mean "no max" */
734 *width = (int)strtol(width_start, NULL, 0);
735 *height = (int)strtol(height_start, NULL, 0);
743 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
746 UINT32 best_mode, currdim, maxdim, mode;
747 int height, max_height, max_width, width;
749 best_mode = maxdim = 0;
750 efi_get_max_resolution(&max_width, &max_height);
751 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
752 status = gop->QueryMode(gop, mode, &infosz, &info);
753 if (EFI_ERROR(status))
755 efifb_from_gop(&efifb, gop->Mode, info);
756 width = info->HorizontalResolution;
757 height = info->VerticalResolution;
758 currdim = width * height;
759 if (currdim > maxdim) {
760 if ((max_width != 0 && width > max_width) ||
761 (max_height != 0 && height > max_height))
769 status = gop->SetMode(gop, best_mode);
770 if (EFI_ERROR(status)) {
771 snprintf(command_errbuf, sizeof(command_errbuf),
772 "gop_autoresize: Unable to set mode to %u (error=%lu)",
773 mode, EFI_ERROR_CODE(status));
776 (void) cons_update_mode(true);
784 SIMPLE_TEXT_OUTPUT_INTERFACE *conout;
786 UINTN i, max_dim, best_mode, cols, rows;
789 max_dim = best_mode = 0;
790 for (i = 0; i < conout->Mode->MaxMode; i++) {
791 status = conout->QueryMode(conout, i, &cols, &rows);
792 if (EFI_ERROR(status))
794 if (cols * rows > max_dim) {
795 max_dim = cols * rows;
800 conout->SetMode(conout, best_mode);
801 (void) cons_update_mode(true);
809 return (text_autoresize());
812 COMMAND_SET(efi_autoresize, "efi-autoresizecons", "EFI Auto-resize Console", command_autoresize);
815 command_autoresize(int argc, char *argv[])
819 textmode = getenv("hw.vga.textmode");
820 /* If it's set and non-zero, we'll select a console mode instead */
821 if (textmode != NULL && strcmp(textmode, "0") != 0)
822 return (text_autoresize());
825 return (gop_autoresize());
828 return (uga_autoresize());
830 snprintf(command_errbuf, sizeof(command_errbuf),
831 "%s: Neither Graphics Output Protocol nor Universal Graphics Adapter present",
835 * Default to text_autoresize if we have neither GOP or UGA. This won't
836 * give us the most ideal resolution, but it will at least leave us
837 * functional rather than failing the boot for an objectively bad
840 return (text_autoresize());
843 COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
846 command_gop(int argc, char *argv[])
853 snprintf(command_errbuf, sizeof(command_errbuf),
854 "%s: Graphics Output Protocol not present", argv[0]);
861 if (!strcmp(argv[1], "set")) {
866 mode = strtol(argv[2], &cp, 0);
868 sprintf(command_errbuf, "mode is an integer");
871 status = gop->SetMode(gop, mode);
872 if (EFI_ERROR(status)) {
873 snprintf(command_errbuf, sizeof(command_errbuf),
874 "%s: Unable to set mode to %u (error=%lu)",
875 argv[0], mode, EFI_ERROR_CODE(status));
878 (void) cons_update_mode(true);
879 } else if (strcmp(argv[1], "off") == 0) {
880 (void) cons_update_mode(false);
881 } else if (strcmp(argv[1], "get") == 0) {
887 efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
888 if (efifb_get_edid(&res)) {
889 struct resolution *rp;
892 while ((rp = TAILQ_FIRST(&res)) != NULL) {
893 printf(" %dx%d", rp->width, rp->height);
894 TAILQ_REMOVE(&res, rp, next);
899 printf("no EDID information\n");
901 print_efifb(gop->Mode->Mode, &efifb, 1);
903 } else if (!strcmp(argv[1], "list")) {
904 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
911 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
912 status = gop->QueryMode(gop, mode, &infosz, &info);
913 if (EFI_ERROR(status))
915 efifb_from_gop(&efifb, gop->Mode, info);
916 print_efifb(mode, &efifb, 0);
917 if (pager_output("\n"))
925 snprintf(command_errbuf, sizeof(command_errbuf),
926 "usage: %s [list | get | set <mode> | off]", argv[0]);
930 COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
933 command_uga(int argc, char *argv[])
938 snprintf(command_errbuf, sizeof(command_errbuf),
939 "%s: UGA Protocol not present", argv[0]);
946 if (efifb_from_uga(&efifb) != CMD_OK) {
947 snprintf(command_errbuf, sizeof(command_errbuf),
948 "%s: Unable to get UGA information", argv[0]);
952 print_efifb(-1, &efifb, 1);
957 snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);