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Index: head/sys/arm64/include/metadata.h
===================================================================
--- head/sys/arm64/include/metadata.h
+++ head/sys/arm64/include/metadata.h
@@ -31,11 +31,24 @@
#define MODINFOMD_EFI_MAP 0x1001
#define MODINFOMD_DTBP 0x1002
+#define MODINFOMD_EFI_FB 0x1003
struct efi_map_header {
size_t memory_size;
size_t descriptor_size;
uint32_t descriptor_version;
+};
+
+struct efi_fb {
+ uint64_t fb_addr;
+ uint64_t fb_size;
+ uint32_t fb_height;
+ uint32_t fb_width;
+ uint32_t fb_stride;
+ uint32_t fb_mask_red;
+ uint32_t fb_mask_green;
+ uint32_t fb_mask_blue;
+ uint32_t fb_mask_reserved;
};
#endif /* !_MACHINE_METADATA_H_ */
Index: head/sys/boot/efi/loader/Makefile
===================================================================
--- head/sys/boot/efi/loader/Makefile
+++ head/sys/boot/efi/loader/Makefile
@@ -22,6 +22,7 @@
conf.c \
copy.c \
efi_main.c \
+ framebuffer.c \
main.c \
self_reloc.c \
smbios.c \
Index: head/sys/boot/efi/loader/arch/amd64/Makefile.inc
===================================================================
--- head/sys/boot/efi/loader/arch/amd64/Makefile.inc
+++ head/sys/boot/efi/loader/arch/amd64/Makefile.inc
@@ -2,7 +2,6 @@
SRCS+= amd64_tramp.S \
start.S \
- framebuffer.c \
elf64_freebsd.c \
trap.c \
exc.S
Index: head/sys/boot/efi/loader/arch/amd64/framebuffer.h
===================================================================
--- head/sys/boot/efi/loader/arch/amd64/framebuffer.h
+++ head/sys/boot/efi/loader/arch/amd64/framebuffer.h
@@ -1,36 +0,0 @@
-/*-
- * Copyright (c) 2013 The FreeBSD Foundation
- * All rights reserved.
- *
- * This software was developed by Benno Rice under sponsorship from
- * the FreeBSD Foundation.
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#ifndef _EFIFB_H_
-#define _EFIFB_H_
-
-int efi_find_framebuffer(struct efi_fb *efifb);
-
-#endif /* _EFIFB_H_ */
Index: head/sys/boot/efi/loader/arch/amd64/framebuffer.c
===================================================================
--- head/sys/boot/efi/loader/arch/amd64/framebuffer.c
+++ head/sys/boot/efi/loader/arch/amd64/framebuffer.c
@@ -1,568 +0,0 @@
-/*-
- * Copyright (c) 2013 The FreeBSD Foundation
- * All rights reserved.
- *
- * This software was developed by Benno Rice under sponsorship from
- * the FreeBSD Foundation.
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <bootstrap.h>
-#include <sys/endian.h>
-#include <stand.h>
-
-#include <efi.h>
-#include <efilib.h>
-#include <efiuga.h>
-#include <efipciio.h>
-#include <machine/metadata.h>
-
-#include "framebuffer.h"
-
-static EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
-static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID;
-static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID;
-
-static u_int
-efifb_color_depth(struct efi_fb *efifb)
-{
- uint32_t mask;
- u_int depth;
-
- mask = efifb->fb_mask_red | efifb->fb_mask_green |
- efifb->fb_mask_blue | efifb->fb_mask_reserved;
- if (mask == 0)
- return (0);
- for (depth = 1; mask != 1; depth++)
- mask >>= 1;
- return (depth);
-}
-
-static int
-efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
- EFI_PIXEL_BITMASK *pixinfo)
-{
- int result;
-
- result = 0;
- switch (pixfmt) {
- case PixelRedGreenBlueReserved8BitPerColor:
- efifb->fb_mask_red = 0x000000ff;
- efifb->fb_mask_green = 0x0000ff00;
- efifb->fb_mask_blue = 0x00ff0000;
- efifb->fb_mask_reserved = 0xff000000;
- break;
- case PixelBlueGreenRedReserved8BitPerColor:
- efifb->fb_mask_red = 0x00ff0000;
- efifb->fb_mask_green = 0x0000ff00;
- efifb->fb_mask_blue = 0x000000ff;
- efifb->fb_mask_reserved = 0xff000000;
- break;
- case PixelBitMask:
- efifb->fb_mask_red = pixinfo->RedMask;
- efifb->fb_mask_green = pixinfo->GreenMask;
- efifb->fb_mask_blue = pixinfo->BlueMask;
- efifb->fb_mask_reserved = pixinfo->ReservedMask;
- break;
- default:
- result = 1;
- break;
- }
- return (result);
-}
-
-static int
-efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
- EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
-{
- int result;
-
- efifb->fb_addr = mode->FrameBufferBase;
- efifb->fb_size = mode->FrameBufferSize;
- efifb->fb_height = info->VerticalResolution;
- efifb->fb_width = info->HorizontalResolution;
- efifb->fb_stride = info->PixelsPerScanLine;
- result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
- &info->PixelInformation);
- return (result);
-}
-
-static ssize_t
-efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
- EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
-{
- EFI_UGA_PIXEL pix0, pix1;
- uint8_t *data1, *data2;
- size_t count, maxcount = 1024;
- ssize_t ofs;
- EFI_STATUS status;
- u_int idx;
-
- status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
- 0, line, 0, 0, 1, 1, 0);
- if (EFI_ERROR(status)) {
- printf("UGA BLT operation failed (video->buffer)");
- return (-1);
- }
- pix1.Red = ~pix0.Red;
- pix1.Green = ~pix0.Green;
- pix1.Blue = ~pix0.Blue;
- pix1.Reserved = 0;
-
- data1 = calloc(maxcount, 2);
- if (data1 == NULL) {
- printf("Unable to allocate memory");
- return (-1);
- }
- data2 = data1 + maxcount;
-
- ofs = 0;
- while (size > 0) {
- count = min(size, maxcount);
-
- status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
- EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
- data1);
- if (EFI_ERROR(status)) {
- printf("Error reading frame buffer (before)");
- goto fail;
- }
- status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
- 0, 0, 0, line, 1, 1, 0);
- if (EFI_ERROR(status)) {
- printf("UGA BLT operation failed (modify)");
- goto fail;
- }
- status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
- EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
- data2);
- if (EFI_ERROR(status)) {
- printf("Error reading frame buffer (after)");
- goto fail;
- }
- status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
- 0, 0, 0, line, 1, 1, 0);
- if (EFI_ERROR(status)) {
- printf("UGA BLT operation failed (restore)");
- goto fail;
- }
- for (idx = 0; idx < count; idx++) {
- if (data1[idx] != data2[idx]) {
- free(data1);
- return (ofs + (idx & ~3));
- }
- }
- ofs += count;
- size -= count;
- }
- printf("No change detected in frame buffer");
-
- fail:
- printf(" -- error %lu\n", EFI_ERROR_CODE(status));
- free(data1);
- return (-1);
-}
-
-static EFI_PCI_IO_PROTOCOL *
-efifb_uga_get_pciio(void)
-{
- EFI_PCI_IO_PROTOCOL *pciio;
- EFI_HANDLE *buf, *hp;
- EFI_STATUS status;
- UINTN bufsz;
-
- /* Get all handles that support the UGA protocol. */
- bufsz = 0;
- status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
- if (status != EFI_BUFFER_TOO_SMALL)
- return (NULL);
- buf = malloc(bufsz);
- status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
- if (status != EFI_SUCCESS) {
- free(buf);
- return (NULL);
- }
- bufsz /= sizeof(EFI_HANDLE);
-
- /* Get the PCI I/O interface of the first handle that supports it. */
- pciio = NULL;
- for (hp = buf; hp < buf + bufsz; hp++) {
- status = BS->HandleProtocol(*hp, &pciio_guid, (void **)&pciio);
- if (status == EFI_SUCCESS) {
- free(buf);
- return (pciio);
- }
- }
- free(buf);
- return (NULL);
-}
-
-static EFI_STATUS
-efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
- uint64_t *sizep)
-{
- uint8_t *resattr;
- uint64_t addr, size;
- EFI_STATUS status;
- u_int bar;
-
- if (pciio == NULL)
- return (EFI_DEVICE_ERROR);
-
- /* Attempt to get the frame buffer address (imprecise). */
- *addrp = 0;
- *sizep = 0;
- for (bar = 0; bar < 6; bar++) {
- status = pciio->GetBarAttributes(pciio, bar, NULL,
- (void **)&resattr);
- if (status != EFI_SUCCESS)
- continue;
- /* XXX magic offsets and constants. */
- if (resattr[0] == 0x87 && resattr[3] == 0) {
- /* 32-bit address space descriptor (MEMIO) */
- addr = le32dec(resattr + 10);
- size = le32dec(resattr + 22);
- } else if (resattr[0] == 0x8a && resattr[3] == 0) {
- /* 64-bit address space descriptor (MEMIO) */
- addr = le64dec(resattr + 14);
- size = le64dec(resattr + 38);
- } else {
- addr = 0;
- size = 0;
- }
- BS->FreePool(resattr);
- if (addr == 0 || size == 0)
- continue;
-
- /* We assume the largest BAR is the frame buffer. */
- if (size > *sizep) {
- *addrp = addr;
- *sizep = size;
- }
- }
- return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
-}
-
-static int
-efifb_from_uga(struct efi_fb *efifb, EFI_UGA_DRAW_PROTOCOL *uga)
-{
- EFI_PCI_IO_PROTOCOL *pciio;
- char *ev, *p;
- EFI_STATUS status;
- ssize_t offset;
- uint64_t fbaddr;
- uint32_t horiz, vert, stride;
- uint32_t np, depth, refresh;
-
- status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
- if (EFI_ERROR(status))
- return (1);
- efifb->fb_height = vert;
- efifb->fb_width = horiz;
- /* Paranoia... */
- if (efifb->fb_height == 0 || efifb->fb_width == 0)
- return (1);
-
- /* The color masks are fixed AFAICT. */
- efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
- NULL);
-
- /* pciio can be NULL on return! */
- pciio = efifb_uga_get_pciio();
-
- /* Try to find the frame buffer. */
- status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
- &efifb->fb_size);
- if (EFI_ERROR(status)) {
- efifb->fb_addr = 0;
- efifb->fb_size = 0;
- }
-
- /*
- * There's no reliable way to detect the frame buffer or the
- * offset within the frame buffer of the visible region, nor
- * the stride. Our only option is to look at the system and
- * fill in the blanks based on that. Luckily, UGA was mostly
- * only used on Apple hardware.
- */
- offset = -1;
- ev = getenv("smbios.system.maker");
- if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
- ev = getenv("smbios.system.product");
- if (ev != NULL && !strcmp(ev, "iMac7,1")) {
- /* These are the expected values we should have. */
- horiz = 1680;
- vert = 1050;
- fbaddr = 0xc0000000;
- /* These are the missing bits. */
- offset = 0x10000;
- stride = 1728;
- } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
- /* These are the expected values we should have. */
- horiz = 1280;
- vert = 800;
- fbaddr = 0xc0000000;
- /* These are the missing bits. */
- offset = 0x0;
- stride = 2048;
- }
- }
-
- /*
- * If this is hardware we know, make sure that it looks familiar
- * before we accept our hardcoded values.
- */
- if (offset >= 0 && efifb->fb_width == horiz &&
- efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
- efifb->fb_addr += offset;
- efifb->fb_size -= offset;
- efifb->fb_stride = stride;
- return (0);
- } else if (offset >= 0) {
- printf("Hardware make/model known, but graphics not "
- "as expected.\n");
- printf("Console may not work!\n");
- }
-
- /*
- * The stride is equal or larger to the width. Often it's the
- * next larger power of two. We'll start with that...
- */
- efifb->fb_stride = efifb->fb_width;
- do {
- np = efifb->fb_stride & (efifb->fb_stride - 1);
- if (np) {
- efifb->fb_stride |= (np - 1);
- efifb->fb_stride++;
- }
- } while (np);
-
- ev = getenv("hw.efifb.address");
- if (ev == NULL) {
- if (efifb->fb_addr == 0) {
- printf("Please set hw.efifb.address and "
- "hw.efifb.stride.\n");
- return (1);
- }
-
- /*
- * The visible part of the frame buffer may not start at
- * offset 0, so try to detect it. Note that we may not
- * always be able to read from the frame buffer, which
- * means that we may not be able to detect anything. In
- * that case, we would take a long time scanning for a
- * pixel change in the frame buffer, which would have it
- * appear that we're hanging, so we limit the scan to
- * 1/256th of the frame buffer. This number is mostly
- * based on PR 202730 and the fact that on a MacBoook,
- * where we can't read from the frame buffer the offset
- * of the visible region is 0. In short: we want to scan
- * enough to handle all adapters that have an offset
- * larger than 0 and we want to scan as little as we can
- * to not appear to hang when we can't read from the
- * frame buffer.
- */
- offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
- efifb->fb_size >> 8);
- if (offset == -1) {
- printf("Unable to reliably detect frame buffer.\n");
- } else if (offset > 0) {
- efifb->fb_addr += offset;
- efifb->fb_size -= offset;
- }
- } else {
- offset = 0;
- efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
- efifb->fb_addr = strtoul(ev, &p, 0);
- if (*p != '\0')
- return (1);
- }
-
- ev = getenv("hw.efifb.stride");
- if (ev == NULL) {
- if (pciio != NULL && offset != -1) {
- /* Determine the stride. */
- offset = efifb_uga_find_pixel(uga, 1, pciio,
- efifb->fb_addr, horiz * 8);
- if (offset != -1)
- efifb->fb_stride = offset >> 2;
- } else {
- printf("Unable to reliably detect the stride.\n");
- }
- } else {
- efifb->fb_stride = strtoul(ev, &p, 0);
- if (*p != '\0')
- return (1);
- }
-
- /*
- * We finalized on the stride, so recalculate the size of the
- * frame buffer.
- */
- efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
- return (0);
-}
-
-int
-efi_find_framebuffer(struct efi_fb *efifb)
-{
- EFI_GRAPHICS_OUTPUT *gop;
- EFI_UGA_DRAW_PROTOCOL *uga;
- EFI_STATUS status;
-
- status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop);
- if (status == EFI_SUCCESS)
- return (efifb_from_gop(efifb, gop->Mode, gop->Mode->Info));
-
- status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
- if (status == EFI_SUCCESS)
- return (efifb_from_uga(efifb, uga));
-
- return (1);
-}
-
-static void
-print_efifb(int mode, struct efi_fb *efifb, int verbose)
-{
- u_int depth;
-
- if (mode >= 0)
- printf("mode %d: ", mode);
- depth = efifb_color_depth(efifb);
- printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
- depth, efifb->fb_stride);
- if (verbose) {
- printf("\n frame buffer: address=%jx, size=%jx",
- (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
- printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
- efifb->fb_mask_red, efifb->fb_mask_green,
- efifb->fb_mask_blue);
- }
-}
-
-COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
-
-static int
-command_gop(int argc, char *argv[])
-{
- struct efi_fb efifb;
- EFI_GRAPHICS_OUTPUT *gop;
- EFI_STATUS status;
- u_int mode;
-
- status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop);
- if (EFI_ERROR(status)) {
- snprintf(command_errbuf, sizeof(command_errbuf),
- "%s: Graphics Output Protocol not present (error=%lu)",
- argv[0], EFI_ERROR_CODE(status));
- return (CMD_ERROR);
- }
-
- if (argc < 2)
- goto usage;
-
- if (!strcmp(argv[1], "set")) {
- char *cp;
-
- if (argc != 3)
- goto usage;
- mode = strtol(argv[2], &cp, 0);
- if (cp[0] != '\0') {
- sprintf(command_errbuf, "mode is an integer");
- return (CMD_ERROR);
- }
- status = gop->SetMode(gop, mode);
- if (EFI_ERROR(status)) {
- snprintf(command_errbuf, sizeof(command_errbuf),
- "%s: Unable to set mode to %u (error=%lu)",
- argv[0], mode, EFI_ERROR_CODE(status));
- return (CMD_ERROR);
- }
- } else if (!strcmp(argv[1], "get")) {
- if (argc != 2)
- goto usage;
- efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
- print_efifb(gop->Mode->Mode, &efifb, 1);
- printf("\n");
- } else if (!strcmp(argv[1], "list")) {
- EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
- UINTN infosz;
-
- if (argc != 2)
- goto usage;
- pager_open();
- for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
- status = gop->QueryMode(gop, mode, &infosz, &info);
- if (EFI_ERROR(status))
- continue;
- efifb_from_gop(&efifb, gop->Mode, info);
- print_efifb(mode, &efifb, 0);
- if (pager_output("\n"))
- break;
- }
- pager_close();
- }
- return (CMD_OK);
-
- usage:
- snprintf(command_errbuf, sizeof(command_errbuf),
- "usage: %s [list | get | set <mode>]", argv[0]);
- return (CMD_ERROR);
-}
-
-COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
-
-static int
-command_uga(int argc, char *argv[])
-{
- struct efi_fb efifb;
- EFI_UGA_DRAW_PROTOCOL *uga;
- EFI_STATUS status;
-
- status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
- if (EFI_ERROR(status)) {
- snprintf(command_errbuf, sizeof(command_errbuf),
- "%s: UGA Protocol not present (error=%lu)",
- argv[0], EFI_ERROR_CODE(status));
- return (CMD_ERROR);
- }
-
- if (argc != 1)
- goto usage;
-
- if (efifb_from_uga(&efifb, uga) != CMD_OK) {
- snprintf(command_errbuf, sizeof(command_errbuf),
- "%s: Unable to get UGA information", argv[0]);
- return (CMD_ERROR);
- }
-
- print_efifb(-1, &efifb, 1);
- printf("\n");
- return (CMD_OK);
-
- usage:
- snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);
- return (CMD_ERROR);
-}
Index: head/sys/boot/efi/loader/bootinfo.c
===================================================================
--- head/sys/boot/efi/loader/bootinfo.c
+++ head/sys/boot/efi/loader/bootinfo.c
@@ -48,9 +48,10 @@
#if defined(__amd64__)
#include <machine/specialreg.h>
-#include "framebuffer.h"
#endif
+#include "framebuffer.h"
+
#if defined(LOADER_FDT_SUPPORT)
#include <fdt_platform.h>
#endif
@@ -247,12 +248,12 @@
UINT32 mmver;
struct efi_map_header *efihdr;
-#if defined(__amd64__)
+#if defined(__amd64__) || defined(__aarch64__)
struct efi_fb efifb;
if (efi_find_framebuffer(&efifb) == 0) {
printf("EFI framebuffer information:\n");
- printf("addr, size 0x%lx, 0x%lx\n", efifb.fb_addr,
+ printf("addr, size 0x%jx, 0x%jx\n", efifb.fb_addr,
efifb.fb_size);
printf("dimensions %d x %d\n", efifb.fb_width,
efifb.fb_height);
Index: head/sys/boot/efi/loader/framebuffer.h
===================================================================
--- head/sys/boot/efi/loader/framebuffer.h
+++ head/sys/boot/efi/loader/framebuffer.h
@@ -0,0 +1,36 @@
+/*-
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Benno Rice under sponsorship from
+ * the FreeBSD Foundation.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _EFIFB_H_
+#define _EFIFB_H_
+
+int efi_find_framebuffer(struct efi_fb *efifb);
+
+#endif /* _EFIFB_H_ */
Index: head/sys/boot/efi/loader/framebuffer.c
===================================================================
--- head/sys/boot/efi/loader/framebuffer.c
+++ head/sys/boot/efi/loader/framebuffer.c
@@ -0,0 +1,568 @@
+/*-
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Benno Rice under sponsorship from
+ * the FreeBSD Foundation.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <bootstrap.h>
+#include <sys/endian.h>
+#include <stand.h>
+
+#include <efi.h>
+#include <efilib.h>
+#include <efiuga.h>
+#include <efipciio.h>
+#include <machine/metadata.h>
+
+#include "framebuffer.h"
+
+static EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID;
+static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID;
+
+static u_int
+efifb_color_depth(struct efi_fb *efifb)
+{
+ uint32_t mask;
+ u_int depth;
+
+ mask = efifb->fb_mask_red | efifb->fb_mask_green |
+ efifb->fb_mask_blue | efifb->fb_mask_reserved;
+ if (mask == 0)
+ return (0);
+ for (depth = 1; mask != 1; depth++)
+ mask >>= 1;
+ return (depth);
+}
+
+static int
+efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
+ EFI_PIXEL_BITMASK *pixinfo)
+{
+ int result;
+
+ result = 0;
+ switch (pixfmt) {
+ case PixelRedGreenBlueReserved8BitPerColor:
+ efifb->fb_mask_red = 0x000000ff;
+ efifb->fb_mask_green = 0x0000ff00;
+ efifb->fb_mask_blue = 0x00ff0000;
+ efifb->fb_mask_reserved = 0xff000000;
+ break;
+ case PixelBlueGreenRedReserved8BitPerColor:
+ efifb->fb_mask_red = 0x00ff0000;
+ efifb->fb_mask_green = 0x0000ff00;
+ efifb->fb_mask_blue = 0x000000ff;
+ efifb->fb_mask_reserved = 0xff000000;
+ break;
+ case PixelBitMask:
+ efifb->fb_mask_red = pixinfo->RedMask;
+ efifb->fb_mask_green = pixinfo->GreenMask;
+ efifb->fb_mask_blue = pixinfo->BlueMask;
+ efifb->fb_mask_reserved = pixinfo->ReservedMask;
+ break;
+ default:
+ result = 1;
+ break;
+ }
+ return (result);
+}
+
+static int
+efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
+ EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
+{
+ int result;
+
+ efifb->fb_addr = mode->FrameBufferBase;
+ efifb->fb_size = mode->FrameBufferSize;
+ efifb->fb_height = info->VerticalResolution;
+ efifb->fb_width = info->HorizontalResolution;
+ efifb->fb_stride = info->PixelsPerScanLine;
+ result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
+ &info->PixelInformation);
+ return (result);
+}
+
+static ssize_t
+efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
+ EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
+{
+ EFI_UGA_PIXEL pix0, pix1;
+ uint8_t *data1, *data2;
+ size_t count, maxcount = 1024;
+ ssize_t ofs;
+ EFI_STATUS status;
+ u_int idx;
+
+ status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
+ 0, line, 0, 0, 1, 1, 0);
+ if (EFI_ERROR(status)) {
+ printf("UGA BLT operation failed (video->buffer)");
+ return (-1);
+ }
+ pix1.Red = ~pix0.Red;
+ pix1.Green = ~pix0.Green;
+ pix1.Blue = ~pix0.Blue;
+ pix1.Reserved = 0;
+
+ data1 = calloc(maxcount, 2);
+ if (data1 == NULL) {
+ printf("Unable to allocate memory");
+ return (-1);
+ }
+ data2 = data1 + maxcount;
+
+ ofs = 0;
+ while (size > 0) {
+ count = min(size, maxcount);
+
+ status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
+ EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
+ data1);
+ if (EFI_ERROR(status)) {
+ printf("Error reading frame buffer (before)");
+ goto fail;
+ }
+ status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
+ 0, 0, 0, line, 1, 1, 0);
+ if (EFI_ERROR(status)) {
+ printf("UGA BLT operation failed (modify)");
+ goto fail;
+ }
+ status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
+ EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
+ data2);
+ if (EFI_ERROR(status)) {
+ printf("Error reading frame buffer (after)");
+ goto fail;
+ }
+ status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
+ 0, 0, 0, line, 1, 1, 0);
+ if (EFI_ERROR(status)) {
+ printf("UGA BLT operation failed (restore)");
+ goto fail;
+ }
+ for (idx = 0; idx < count; idx++) {
+ if (data1[idx] != data2[idx]) {
+ free(data1);
+ return (ofs + (idx & ~3));
+ }
+ }
+ ofs += count;
+ size -= count;
+ }
+ printf("No change detected in frame buffer");
+
+ fail:
+ printf(" -- error %lu\n", EFI_ERROR_CODE(status));
+ free(data1);
+ return (-1);
+}
+
+static EFI_PCI_IO_PROTOCOL *
+efifb_uga_get_pciio(void)
+{
+ EFI_PCI_IO_PROTOCOL *pciio;
+ EFI_HANDLE *buf, *hp;
+ EFI_STATUS status;
+ UINTN bufsz;
+
+ /* Get all handles that support the UGA protocol. */
+ bufsz = 0;
+ status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
+ if (status != EFI_BUFFER_TOO_SMALL)
+ return (NULL);
+ buf = malloc(bufsz);
+ status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
+ if (status != EFI_SUCCESS) {
+ free(buf);
+ return (NULL);
+ }
+ bufsz /= sizeof(EFI_HANDLE);
+
+ /* Get the PCI I/O interface of the first handle that supports it. */
+ pciio = NULL;
+ for (hp = buf; hp < buf + bufsz; hp++) {
+ status = BS->HandleProtocol(*hp, &pciio_guid, (void **)&pciio);
+ if (status == EFI_SUCCESS) {
+ free(buf);
+ return (pciio);
+ }
+ }
+ free(buf);
+ return (NULL);
+}
+
+static EFI_STATUS
+efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
+ uint64_t *sizep)
+{
+ uint8_t *resattr;
+ uint64_t addr, size;
+ EFI_STATUS status;
+ u_int bar;
+
+ if (pciio == NULL)
+ return (EFI_DEVICE_ERROR);
+
+ /* Attempt to get the frame buffer address (imprecise). */
+ *addrp = 0;
+ *sizep = 0;
+ for (bar = 0; bar < 6; bar++) {
+ status = pciio->GetBarAttributes(pciio, bar, NULL,
+ (void **)&resattr);
+ if (status != EFI_SUCCESS)
+ continue;
+ /* XXX magic offsets and constants. */
+ if (resattr[0] == 0x87 && resattr[3] == 0) {
+ /* 32-bit address space descriptor (MEMIO) */
+ addr = le32dec(resattr + 10);
+ size = le32dec(resattr + 22);
+ } else if (resattr[0] == 0x8a && resattr[3] == 0) {
+ /* 64-bit address space descriptor (MEMIO) */
+ addr = le64dec(resattr + 14);
+ size = le64dec(resattr + 38);
+ } else {
+ addr = 0;
+ size = 0;
+ }
+ BS->FreePool(resattr);
+ if (addr == 0 || size == 0)
+ continue;
+
+ /* We assume the largest BAR is the frame buffer. */
+ if (size > *sizep) {
+ *addrp = addr;
+ *sizep = size;
+ }
+ }
+ return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
+}
+
+static int
+efifb_from_uga(struct efi_fb *efifb, EFI_UGA_DRAW_PROTOCOL *uga)
+{
+ EFI_PCI_IO_PROTOCOL *pciio;
+ char *ev, *p;
+ EFI_STATUS status;
+ ssize_t offset;
+ uint64_t fbaddr;
+ uint32_t horiz, vert, stride;
+ uint32_t np, depth, refresh;
+
+ status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
+ if (EFI_ERROR(status))
+ return (1);
+ efifb->fb_height = vert;
+ efifb->fb_width = horiz;
+ /* Paranoia... */
+ if (efifb->fb_height == 0 || efifb->fb_width == 0)
+ return (1);
+
+ /* The color masks are fixed AFAICT. */
+ efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
+ NULL);
+
+ /* pciio can be NULL on return! */
+ pciio = efifb_uga_get_pciio();
+
+ /* Try to find the frame buffer. */
+ status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
+ &efifb->fb_size);
+ if (EFI_ERROR(status)) {
+ efifb->fb_addr = 0;
+ efifb->fb_size = 0;
+ }
+
+ /*
+ * There's no reliable way to detect the frame buffer or the
+ * offset within the frame buffer of the visible region, nor
+ * the stride. Our only option is to look at the system and
+ * fill in the blanks based on that. Luckily, UGA was mostly
+ * only used on Apple hardware.
+ */
+ offset = -1;
+ ev = getenv("smbios.system.maker");
+ if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
+ ev = getenv("smbios.system.product");
+ if (ev != NULL && !strcmp(ev, "iMac7,1")) {
+ /* These are the expected values we should have. */
+ horiz = 1680;
+ vert = 1050;
+ fbaddr = 0xc0000000;
+ /* These are the missing bits. */
+ offset = 0x10000;
+ stride = 1728;
+ } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
+ /* These are the expected values we should have. */
+ horiz = 1280;
+ vert = 800;
+ fbaddr = 0xc0000000;
+ /* These are the missing bits. */
+ offset = 0x0;
+ stride = 2048;
+ }
+ }
+
+ /*
+ * If this is hardware we know, make sure that it looks familiar
+ * before we accept our hardcoded values.
+ */
+ if (offset >= 0 && efifb->fb_width == horiz &&
+ efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
+ efifb->fb_addr += offset;
+ efifb->fb_size -= offset;
+ efifb->fb_stride = stride;
+ return (0);
+ } else if (offset >= 0) {
+ printf("Hardware make/model known, but graphics not "
+ "as expected.\n");
+ printf("Console may not work!\n");
+ }
+
+ /*
+ * The stride is equal or larger to the width. Often it's the
+ * next larger power of two. We'll start with that...
+ */
+ efifb->fb_stride = efifb->fb_width;
+ do {
+ np = efifb->fb_stride & (efifb->fb_stride - 1);
+ if (np) {
+ efifb->fb_stride |= (np - 1);
+ efifb->fb_stride++;
+ }
+ } while (np);
+
+ ev = getenv("hw.efifb.address");
+ if (ev == NULL) {
+ if (efifb->fb_addr == 0) {
+ printf("Please set hw.efifb.address and "
+ "hw.efifb.stride.\n");
+ return (1);
+ }
+
+ /*
+ * The visible part of the frame buffer may not start at
+ * offset 0, so try to detect it. Note that we may not
+ * always be able to read from the frame buffer, which
+ * means that we may not be able to detect anything. In
+ * that case, we would take a long time scanning for a
+ * pixel change in the frame buffer, which would have it
+ * appear that we're hanging, so we limit the scan to
+ * 1/256th of the frame buffer. This number is mostly
+ * based on PR 202730 and the fact that on a MacBoook,
+ * where we can't read from the frame buffer the offset
+ * of the visible region is 0. In short: we want to scan
+ * enough to handle all adapters that have an offset
+ * larger than 0 and we want to scan as little as we can
+ * to not appear to hang when we can't read from the
+ * frame buffer.
+ */
+ offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
+ efifb->fb_size >> 8);
+ if (offset == -1) {
+ printf("Unable to reliably detect frame buffer.\n");
+ } else if (offset > 0) {
+ efifb->fb_addr += offset;
+ efifb->fb_size -= offset;
+ }
+ } else {
+ offset = 0;
+ efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
+ efifb->fb_addr = strtoul(ev, &p, 0);
+ if (*p != '\0')
+ return (1);
+ }
+
+ ev = getenv("hw.efifb.stride");
+ if (ev == NULL) {
+ if (pciio != NULL && offset != -1) {
+ /* Determine the stride. */
+ offset = efifb_uga_find_pixel(uga, 1, pciio,
+ efifb->fb_addr, horiz * 8);
+ if (offset != -1)
+ efifb->fb_stride = offset >> 2;
+ } else {
+ printf("Unable to reliably detect the stride.\n");
+ }
+ } else {
+ efifb->fb_stride = strtoul(ev, &p, 0);
+ if (*p != '\0')
+ return (1);
+ }
+
+ /*
+ * We finalized on the stride, so recalculate the size of the
+ * frame buffer.
+ */
+ efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
+ return (0);
+}
+
+int
+efi_find_framebuffer(struct efi_fb *efifb)
+{
+ EFI_GRAPHICS_OUTPUT *gop;
+ EFI_UGA_DRAW_PROTOCOL *uga;
+ EFI_STATUS status;
+
+ status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop);
+ if (status == EFI_SUCCESS)
+ return (efifb_from_gop(efifb, gop->Mode, gop->Mode->Info));
+
+ status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
+ if (status == EFI_SUCCESS)
+ return (efifb_from_uga(efifb, uga));
+
+ return (1);
+}
+
+static void
+print_efifb(int mode, struct efi_fb *efifb, int verbose)
+{
+ u_int depth;
+
+ if (mode >= 0)
+ printf("mode %d: ", mode);
+ depth = efifb_color_depth(efifb);
+ printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
+ depth, efifb->fb_stride);
+ if (verbose) {
+ printf("\n frame buffer: address=%jx, size=%jx",
+ (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
+ printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
+ efifb->fb_mask_red, efifb->fb_mask_green,
+ efifb->fb_mask_blue);
+ }
+}
+
+COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
+
+static int
+command_gop(int argc, char *argv[])
+{
+ struct efi_fb efifb;
+ EFI_GRAPHICS_OUTPUT *gop;
+ EFI_STATUS status;
+ u_int mode;
+
+ status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop);
+ if (EFI_ERROR(status)) {
+ snprintf(command_errbuf, sizeof(command_errbuf),
+ "%s: Graphics Output Protocol not present (error=%lu)",
+ argv[0], EFI_ERROR_CODE(status));
+ return (CMD_ERROR);
+ }
+
+ if (argc < 2)
+ goto usage;
+
+ if (!strcmp(argv[1], "set")) {
+ char *cp;
+
+ if (argc != 3)
+ goto usage;
+ mode = strtol(argv[2], &cp, 0);
+ if (cp[0] != '\0') {
+ sprintf(command_errbuf, "mode is an integer");
+ return (CMD_ERROR);
+ }
+ status = gop->SetMode(gop, mode);
+ if (EFI_ERROR(status)) {
+ snprintf(command_errbuf, sizeof(command_errbuf),
+ "%s: Unable to set mode to %u (error=%lu)",
+ argv[0], mode, EFI_ERROR_CODE(status));
+ return (CMD_ERROR);
+ }
+ } else if (!strcmp(argv[1], "get")) {
+ if (argc != 2)
+ goto usage;
+ efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
+ print_efifb(gop->Mode->Mode, &efifb, 1);
+ printf("\n");
+ } else if (!strcmp(argv[1], "list")) {
+ EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
+ UINTN infosz;
+
+ if (argc != 2)
+ goto usage;
+ pager_open();
+ for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
+ status = gop->QueryMode(gop, mode, &infosz, &info);
+ if (EFI_ERROR(status))
+ continue;
+ efifb_from_gop(&efifb, gop->Mode, info);
+ print_efifb(mode, &efifb, 0);
+ if (pager_output("\n"))
+ break;
+ }
+ pager_close();
+ }
+ return (CMD_OK);
+
+ usage:
+ snprintf(command_errbuf, sizeof(command_errbuf),
+ "usage: %s [list | get | set <mode>]", argv[0]);
+ return (CMD_ERROR);
+}
+
+COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
+
+static int
+command_uga(int argc, char *argv[])
+{
+ struct efi_fb efifb;
+ EFI_UGA_DRAW_PROTOCOL *uga;
+ EFI_STATUS status;
+
+ status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
+ if (EFI_ERROR(status)) {
+ snprintf(command_errbuf, sizeof(command_errbuf),
+ "%s: UGA Protocol not present (error=%lu)",
+ argv[0], EFI_ERROR_CODE(status));
+ return (CMD_ERROR);
+ }
+
+ if (argc != 1)
+ goto usage;
+
+ if (efifb_from_uga(&efifb, uga) != CMD_OK) {
+ snprintf(command_errbuf, sizeof(command_errbuf),
+ "%s: Unable to get UGA information", argv[0]);
+ return (CMD_ERROR);
+ }
+
+ print_efifb(-1, &efifb, 1);
+ printf("\n");
+ return (CMD_OK);
+
+ usage:
+ snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);
+ return (CMD_ERROR);
+}

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