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 __FBSDID("$FreeBSD$");
31 #include <bootstrap.h>
32 #include <sys/endian.h>
33 #include <sys/param.h>
40 #include <Protocol/EdidActive.h>
41 #include <Protocol/EdidDiscovered.h>
42 #include <machine/metadata.h>
44 #include "bootstrap.h"
45 #include "framebuffer.h"
47 static EFI_GUID conout_guid = EFI_CONSOLE_OUT_DEVICE_GUID;
48 EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
49 static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID;
50 static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID;
51 static EFI_GUID active_edid_guid = EFI_EDID_ACTIVE_PROTOCOL_GUID;
52 static EFI_GUID discovered_edid_guid = EFI_EDID_DISCOVERED_PROTOCOL_GUID;
53 static EFI_HANDLE gop_handle;
56 struct vesa_edid_info *edid_info = NULL;
58 static EFI_GRAPHICS_OUTPUT *gop;
59 static EFI_UGA_DRAW_PROTOCOL *uga;
61 static struct named_resolution {
96 efifb_color_depth(struct efi_fb *efifb)
101 mask = efifb->fb_mask_red | efifb->fb_mask_green |
102 efifb->fb_mask_blue | efifb->fb_mask_reserved;
105 for (depth = 1; mask != 1; depth++)
111 efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
112 EFI_PIXEL_BITMASK *pixinfo)
118 case PixelRedGreenBlueReserved8BitPerColor:
120 efifb->fb_mask_red = 0x000000ff;
121 efifb->fb_mask_green = 0x0000ff00;
122 efifb->fb_mask_blue = 0x00ff0000;
123 efifb->fb_mask_reserved = 0xff000000;
125 case PixelBlueGreenRedReserved8BitPerColor:
126 efifb->fb_mask_red = 0x00ff0000;
127 efifb->fb_mask_green = 0x0000ff00;
128 efifb->fb_mask_blue = 0x000000ff;
129 efifb->fb_mask_reserved = 0xff000000;
132 efifb->fb_mask_red = pixinfo->RedMask;
133 efifb->fb_mask_green = pixinfo->GreenMask;
134 efifb->fb_mask_blue = pixinfo->BlueMask;
135 efifb->fb_mask_reserved = pixinfo->ReservedMask;
145 efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
146 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
150 efifb->fb_addr = mode->FrameBufferBase;
151 efifb->fb_size = mode->FrameBufferSize;
152 efifb->fb_height = info->VerticalResolution;
153 efifb->fb_width = info->HorizontalResolution;
154 efifb->fb_stride = info->PixelsPerScanLine;
155 result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
156 &info->PixelInformation);
161 efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
162 EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
164 EFI_UGA_PIXEL pix0, pix1;
165 uint8_t *data1, *data2;
166 size_t count, maxcount = 1024;
171 status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
172 0, line, 0, 0, 1, 1, 0);
173 if (EFI_ERROR(status)) {
174 printf("UGA BLT operation failed (video->buffer)");
177 pix1.Red = ~pix0.Red;
178 pix1.Green = ~pix0.Green;
179 pix1.Blue = ~pix0.Blue;
182 data1 = calloc(maxcount, 2);
184 printf("Unable to allocate memory");
187 data2 = data1 + maxcount;
191 count = min(size, maxcount);
193 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
194 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
196 if (EFI_ERROR(status)) {
197 printf("Error reading frame buffer (before)");
200 status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
201 0, 0, 0, line, 1, 1, 0);
202 if (EFI_ERROR(status)) {
203 printf("UGA BLT operation failed (modify)");
206 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
207 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
209 if (EFI_ERROR(status)) {
210 printf("Error reading frame buffer (after)");
213 status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
214 0, 0, 0, line, 1, 1, 0);
215 if (EFI_ERROR(status)) {
216 printf("UGA BLT operation failed (restore)");
219 for (idx = 0; idx < count; idx++) {
220 if (data1[idx] != data2[idx]) {
222 return (ofs + (idx & ~3));
228 printf("No change detected in frame buffer");
231 printf(" -- error %lu\n", EFI_ERROR_CODE(status));
236 static EFI_PCI_IO_PROTOCOL *
237 efifb_uga_get_pciio(void)
239 EFI_PCI_IO_PROTOCOL *pciio;
240 EFI_HANDLE *buf, *hp;
244 /* Get all handles that support the UGA protocol. */
246 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
247 if (status != EFI_BUFFER_TOO_SMALL)
250 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
251 if (status != EFI_SUCCESS) {
255 bufsz /= sizeof(EFI_HANDLE);
257 /* Get the PCI I/O interface of the first handle that supports it. */
259 for (hp = buf; hp < buf + bufsz; hp++) {
260 status = OpenProtocolByHandle(*hp, &pciio_guid,
262 if (status == EFI_SUCCESS) {
272 efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
281 return (EFI_DEVICE_ERROR);
283 /* Attempt to get the frame buffer address (imprecise). */
286 for (bar = 0; bar < 6; bar++) {
287 status = pciio->GetBarAttributes(pciio, bar, NULL,
289 if (status != EFI_SUCCESS)
291 /* XXX magic offsets and constants. */
292 if (resattr[0] == 0x87 && resattr[3] == 0) {
293 /* 32-bit address space descriptor (MEMIO) */
294 addr = le32dec(resattr + 10);
295 size = le32dec(resattr + 22);
296 } else if (resattr[0] == 0x8a && resattr[3] == 0) {
297 /* 64-bit address space descriptor (MEMIO) */
298 addr = le64dec(resattr + 14);
299 size = le64dec(resattr + 38);
304 BS->FreePool(resattr);
305 if (addr == 0 || size == 0)
308 /* We assume the largest BAR is the frame buffer. */
314 return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
318 efifb_from_uga(struct efi_fb *efifb)
320 EFI_PCI_IO_PROTOCOL *pciio;
325 uint32_t horiz, vert, stride;
326 uint32_t np, depth, refresh;
328 status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
329 if (EFI_ERROR(status))
331 efifb->fb_height = vert;
332 efifb->fb_width = horiz;
334 if (efifb->fb_height == 0 || efifb->fb_width == 0)
337 /* The color masks are fixed AFAICT. */
338 efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
341 /* pciio can be NULL on return! */
342 pciio = efifb_uga_get_pciio();
344 /* Try to find the frame buffer. */
345 status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
347 if (EFI_ERROR(status)) {
353 * There's no reliable way to detect the frame buffer or the
354 * offset within the frame buffer of the visible region, nor
355 * the stride. Our only option is to look at the system and
356 * fill in the blanks based on that. Luckily, UGA was mostly
357 * only used on Apple hardware.
360 ev = getenv("smbios.system.maker");
361 if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
362 ev = getenv("smbios.system.product");
363 if (ev != NULL && !strcmp(ev, "iMac7,1")) {
364 /* These are the expected values we should have. */
368 /* These are the missing bits. */
371 } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
372 /* These are the expected values we should have. */
376 /* These are the missing bits. */
383 * If this is hardware we know, make sure that it looks familiar
384 * before we accept our hardcoded values.
386 if (offset >= 0 && efifb->fb_width == horiz &&
387 efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
388 efifb->fb_addr += offset;
389 efifb->fb_size -= offset;
390 efifb->fb_stride = stride;
392 } else if (offset >= 0) {
393 printf("Hardware make/model known, but graphics not "
395 printf("Console may not work!\n");
399 * The stride is equal or larger to the width. Often it's the
400 * next larger power of two. We'll start with that...
402 efifb->fb_stride = efifb->fb_width;
404 np = efifb->fb_stride & (efifb->fb_stride - 1);
406 efifb->fb_stride |= (np - 1);
411 ev = getenv("hw.efifb.address");
413 if (efifb->fb_addr == 0) {
414 printf("Please set hw.efifb.address and "
415 "hw.efifb.stride.\n");
420 * The visible part of the frame buffer may not start at
421 * offset 0, so try to detect it. Note that we may not
422 * always be able to read from the frame buffer, which
423 * means that we may not be able to detect anything. In
424 * that case, we would take a long time scanning for a
425 * pixel change in the frame buffer, which would have it
426 * appear that we're hanging, so we limit the scan to
427 * 1/256th of the frame buffer. This number is mostly
428 * based on PR 202730 and the fact that on a MacBoook,
429 * where we can't read from the frame buffer the offset
430 * of the visible region is 0. In short: we want to scan
431 * enough to handle all adapters that have an offset
432 * larger than 0 and we want to scan as little as we can
433 * to not appear to hang when we can't read from the
436 offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
437 efifb->fb_size >> 8);
439 printf("Unable to reliably detect frame buffer.\n");
440 } else if (offset > 0) {
441 efifb->fb_addr += offset;
442 efifb->fb_size -= offset;
446 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
447 efifb->fb_addr = strtoul(ev, &p, 0);
452 ev = getenv("hw.efifb.stride");
454 if (pciio != NULL && offset != -1) {
455 /* Determine the stride. */
456 offset = efifb_uga_find_pixel(uga, 1, pciio,
457 efifb->fb_addr, horiz * 8);
459 efifb->fb_stride = offset >> 2;
461 printf("Unable to reliably detect the stride.\n");
464 efifb->fb_stride = strtoul(ev, &p, 0);
470 * We finalized on the stride, so recalculate the size of the
473 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
478 * Fetch EDID info. Caller must free the buffer.
480 static struct vesa_edid_info *
481 efifb_gop_get_edid(EFI_HANDLE h)
483 const uint8_t magic[] = EDID_MAGIC;
484 EFI_EDID_ACTIVE_PROTOCOL *edid;
485 struct vesa_edid_info *edid_infop;
490 guid = &active_edid_guid;
491 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
492 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
493 if (status != EFI_SUCCESS ||
494 edid->SizeOfEdid == 0) {
495 guid = &discovered_edid_guid;
496 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
497 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
498 if (status != EFI_SUCCESS ||
499 edid->SizeOfEdid == 0)
503 size = MAX(sizeof(*edid_infop), edid->SizeOfEdid);
505 edid_infop = calloc(1, size);
506 if (edid_infop == NULL)
509 memcpy(edid_infop, edid->Edid, edid->SizeOfEdid);
512 if (memcmp(edid_infop, magic, sizeof (magic)) != 0)
515 if (edid_infop->header.version != 1)
525 efifb_get_edid(edid_res_list_t *res)
529 if (edid_info == NULL)
530 edid_info = efifb_gop_get_edid(gop_handle);
532 if (edid_info != NULL)
533 rv = gfx_get_edid_resolution(edid_info, res);
547 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
549 return (status == EFI_BUFFER_TOO_SMALL);
554 efi_find_framebuffer(teken_gfx_t *gfx_state)
557 UINTN nhandles, i, hsize;
562 gfx_state->tg_fb_type = FB_TEXT;
566 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
567 if (status == EFI_BUFFER_TOO_SMALL) {
568 hlist = malloc(hsize);
571 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize,
573 if (EFI_ERROR(status))
576 if (EFI_ERROR(status))
577 return (efi_status_to_errno(status));
579 nhandles = hsize / sizeof(*hlist);
582 * Search for ConOut protocol, if not found, use first handle.
585 for (i = 0; i < nhandles; i++) {
586 EFI_GRAPHICS_OUTPUT *tgop;
589 status = OpenProtocolByHandle(hlist[i], &gop_guid, (void **)&tgop);
590 if (status != EFI_SUCCESS)
593 if (tgop->Mode->Info->PixelFormat == PixelBltOnly ||
594 tgop->Mode->Info->PixelFormat >= PixelFormatMax)
597 status = OpenProtocolByHandle(hlist[i], &conout_guid, &dummy);
598 if (status == EFI_SUCCESS) {
599 gop_handle = hlist[i];
602 } else if (gop_handle == NULL) {
603 gop_handle = hlist[i];
610 if (gop_handle != NULL) {
611 gfx_state->tg_fb_type = FB_GOP;
612 gfx_state->tg_private = gop;
613 if (edid_info == NULL)
614 edid_info = efifb_gop_get_edid(gop_handle);
616 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
617 if (status == EFI_SUCCESS) {
618 gfx_state->tg_fb_type = FB_UGA;
619 gfx_state->tg_private = uga;
625 switch (gfx_state->tg_fb_type) {
627 rv = efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
631 rv = efifb_from_uga(&efifb);
638 gfx_state->tg_fb.fb_addr = efifb.fb_addr;
639 gfx_state->tg_fb.fb_size = efifb.fb_size;
640 gfx_state->tg_fb.fb_height = efifb.fb_height;
641 gfx_state->tg_fb.fb_width = efifb.fb_width;
642 gfx_state->tg_fb.fb_stride = efifb.fb_stride;
643 gfx_state->tg_fb.fb_mask_red = efifb.fb_mask_red;
644 gfx_state->tg_fb.fb_mask_green = efifb.fb_mask_green;
645 gfx_state->tg_fb.fb_mask_blue = efifb.fb_mask_blue;
646 gfx_state->tg_fb.fb_mask_reserved = efifb.fb_mask_reserved;
648 gfx_state->tg_fb.fb_bpp = fls(efifb.fb_mask_red | efifb.fb_mask_green |
649 efifb.fb_mask_blue | efifb.fb_mask_reserved);
651 if (gfx_state->tg_shadow_fb != NULL)
652 BS->FreePages((EFI_PHYSICAL_ADDRESS)gfx_state->tg_shadow_fb,
653 gfx_state->tg_shadow_sz);
654 gfx_state->tg_shadow_sz =
655 EFI_SIZE_TO_PAGES(efifb.fb_height * efifb.fb_width *
656 sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
657 status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData,
658 gfx_state->tg_shadow_sz,
659 (EFI_PHYSICAL_ADDRESS *)&gfx_state->tg_shadow_fb);
660 if (status != EFI_SUCCESS)
661 gfx_state->tg_shadow_fb = NULL;
667 print_efifb(int mode, struct efi_fb *efifb, int verbose)
672 printf("mode %d: ", mode);
673 depth = efifb_color_depth(efifb);
674 printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
675 depth, efifb->fb_stride);
677 printf("\n frame buffer: address=%jx, size=%jx",
678 (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
679 printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
680 efifb->fb_mask_red, efifb->fb_mask_green,
681 efifb->fb_mask_blue);
686 efi_resolution_compare(struct named_resolution *res, const char *cmp)
689 if (strcasecmp(res->name, cmp) == 0)
691 if (res->alias != NULL && strcasecmp(res->alias, cmp) == 0)
698 efi_get_max_resolution(int *width, int *height)
700 struct named_resolution *res;
702 char *height_start, *width_start;
705 *width = *height = 0;
706 maxres = getenv("efi_max_resolution");
707 /* No max_resolution set? Bail out; choose highest resolution */
710 /* See if it matches one of our known resolutions */
711 for (idx = 0; idx < nitems(resolutions); ++idx) {
712 res = &resolutions[idx];
713 if (efi_resolution_compare(res, maxres)) {
715 *height = res->height;
719 /* Not a known resolution, try to parse it; make a copy we can modify */
720 maxres = strdup(maxres);
723 height_start = strchr(maxres, 'x');
724 if (height_start == NULL) {
728 width_start = maxres;
730 /* Errors from this will effectively mean "no max" */
731 *width = (int)strtol(width_start, NULL, 0);
732 *height = (int)strtol(height_start, NULL, 0);
740 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
743 UINT32 best_mode, currdim, maxdim, mode;
744 int height, max_height, max_width, width;
746 best_mode = maxdim = 0;
747 efi_get_max_resolution(&max_width, &max_height);
748 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
749 status = gop->QueryMode(gop, mode, &infosz, &info);
750 if (EFI_ERROR(status))
752 efifb_from_gop(&efifb, gop->Mode, info);
753 width = info->HorizontalResolution;
754 height = info->VerticalResolution;
755 currdim = width * height;
756 if (currdim > maxdim) {
757 if ((max_width != 0 && width > max_width) ||
758 (max_height != 0 && height > max_height))
766 status = gop->SetMode(gop, best_mode);
767 if (EFI_ERROR(status)) {
768 snprintf(command_errbuf, sizeof(command_errbuf),
769 "gop_autoresize: Unable to set mode to %u (error=%lu)",
770 mode, EFI_ERROR_CODE(status));
773 (void) cons_update_mode(true);
781 SIMPLE_TEXT_OUTPUT_INTERFACE *conout;
783 UINTN i, max_dim, best_mode, cols, rows;
786 max_dim = best_mode = 0;
787 for (i = 0; i < conout->Mode->MaxMode; i++) {
788 status = conout->QueryMode(conout, i, &cols, &rows);
789 if (EFI_ERROR(status))
791 if (cols * rows > max_dim) {
792 max_dim = cols * rows;
797 conout->SetMode(conout, best_mode);
798 (void) cons_update_mode(true);
806 return (text_autoresize());
809 COMMAND_SET(efi_autoresize, "efi-autoresizecons", "EFI Auto-resize Console", command_autoresize);
812 command_autoresize(int argc, char *argv[])
816 textmode = getenv("hw.vga.textmode");
817 /* If it's set and non-zero, we'll select a console mode instead */
818 if (textmode != NULL && strcmp(textmode, "0") != 0)
819 return (text_autoresize());
822 return (gop_autoresize());
825 return (uga_autoresize());
827 snprintf(command_errbuf, sizeof(command_errbuf),
828 "%s: Neither Graphics Output Protocol nor Universal Graphics Adapter present",
832 * Default to text_autoresize if we have neither GOP or UGA. This won't
833 * give us the most ideal resolution, but it will at least leave us
834 * functional rather than failing the boot for an objectively bad
837 return (text_autoresize());
840 COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
843 command_gop(int argc, char *argv[])
850 snprintf(command_errbuf, sizeof(command_errbuf),
851 "%s: Graphics Output Protocol not present", argv[0]);
858 if (!strcmp(argv[1], "set")) {
863 mode = strtol(argv[2], &cp, 0);
865 sprintf(command_errbuf, "mode is an integer");
868 status = gop->SetMode(gop, mode);
869 if (EFI_ERROR(status)) {
870 snprintf(command_errbuf, sizeof(command_errbuf),
871 "%s: Unable to set mode to %u (error=%lu)",
872 argv[0], mode, EFI_ERROR_CODE(status));
875 (void) cons_update_mode(true);
876 } else if (strcmp(argv[1], "off") == 0) {
877 (void) cons_update_mode(false);
878 } else if (strcmp(argv[1], "get") == 0) {
884 efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
885 if (efifb_get_edid(&res)) {
886 struct resolution *rp;
889 while ((rp = TAILQ_FIRST(&res)) != NULL) {
890 printf(" %dx%d", rp->width, rp->height);
891 TAILQ_REMOVE(&res, rp, next);
896 printf("no EDID information\n");
898 print_efifb(gop->Mode->Mode, &efifb, 1);
900 } else if (!strcmp(argv[1], "list")) {
901 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
908 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
909 status = gop->QueryMode(gop, mode, &infosz, &info);
910 if (EFI_ERROR(status))
912 efifb_from_gop(&efifb, gop->Mode, info);
913 print_efifb(mode, &efifb, 0);
914 if (pager_output("\n"))
922 snprintf(command_errbuf, sizeof(command_errbuf),
923 "usage: %s [list | get | set <mode> | off]", argv[0]);
927 COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
930 command_uga(int argc, char *argv[])
935 snprintf(command_errbuf, sizeof(command_errbuf),
936 "%s: UGA Protocol not present", argv[0]);
943 if (efifb_from_uga(&efifb) != CMD_OK) {
944 snprintf(command_errbuf, sizeof(command_errbuf),
945 "%s: Unable to get UGA information", argv[0]);
949 print_efifb(-1, &efifb, 1);
954 snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);