diff options
Diffstat (limited to 'sys/boot/amd64/efi/framebuffer.c')
| -rw-r--r-- | sys/boot/amd64/efi/framebuffer.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sys/boot/amd64/efi/framebuffer.c b/sys/boot/amd64/efi/framebuffer.c new file mode 100644 index 0000000..90bf992 --- /dev/null +++ b/sys/boot/amd64/efi/framebuffer.c @@ -0,0 +1,85 @@ +/*- + * 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 <stand.h> + +#include <efi.h> +#include <efilib.h> +#include <machine/metadata.h> + +static EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; + +int +efi_find_framebuffer(struct efi_fb *efifb) +{ + EFI_GRAPHICS_OUTPUT *gop; + EFI_STATUS status; + EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode; + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info; + + status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop); + if (EFI_ERROR(status)) + return (1); + + mode = gop->Mode; + info = gop->Mode->Info; + + 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; + + switch (info->PixelFormat) { + 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 = info->PixelInformation.RedMask; + efifb->fb_mask_green = info->PixelInformation.GreenMask; + efifb->fb_mask_blue = info->PixelInformation.BlueMask; + efifb->fb_mask_reserved = + info->PixelInformation.ReservedMask; + break; + default: + return (1); + } + return (0); +} |
