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/*-
* 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);
}
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