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Add efifb driver. Driver uses the data passed by UEFI compatible loader/BIOS and
enable to use framebuffer created by those loader.
This commit is contained in:
Aleksandr Rybalko
parent
561a971a76
commit
1a89eaf224
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=262785
143
sys/dev/vt/hw/efifb/efifb.c
Normal file
143
sys/dev/vt/hw/efifb/efifb.c
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@ -0,0 +1,143 @@
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/*-
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* Copyright (c) 2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Aleksandr Rybalko under sponsorship from the
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* FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/fbio.h>
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#include <sys/linker.h>
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#include "opt_platform.h"
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#include <machine/efi.h>
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#include <machine/metadata.h>
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#include <machine/vm.h>
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#include <machine/vmparam.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/pmap.h>
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#include <dev/vt/vt.h>
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#include <dev/vt/hw/fb/vt_fb.h>
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#include <dev/vt/colors/vt_termcolors.h>
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static vd_init_t vt_efb_init;
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static struct vt_driver vt_efb_driver = {
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.vd_init = vt_efb_init,
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.vd_blank = vt_fb_blank,
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.vd_bitbltchr = vt_fb_bitbltchr,
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/* Better than VGA, but still generic driver. */
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.vd_priority = VD_PRIORITY_GENERIC + 1,
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};
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static struct fb_info info;
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VT_CONSDEV_DECLARE(vt_efb_driver,
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MAX(80, PIXEL_WIDTH(VT_FB_DEFAULT_WIDTH)),
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MAX(25, PIXEL_HEIGHT(VT_FB_DEFAULT_HEIGHT)), &info);
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static int
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vt_efb_init(struct vt_device *vd)
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{
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int depth, d, disable, i, len;
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struct fb_info *info;
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struct efi_fb *efifb;
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caddr_t kmdp;
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info = vd->vd_softc;
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disable = 0;
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TUNABLE_INT_FETCH("hw.syscons.disable", &disable);
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if (disable != 0)
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return (CN_DEAD);
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kmdp = preload_search_by_type("elf kernel");
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if (kmdp == NULL)
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kmdp = preload_search_by_type("elf64 kernel");
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efifb = (struct efi_fb *)preload_search_info(kmdp,
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MODINFO_METADATA | MODINFOMD_EFI_FB);
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if (!efifb->fb_present)
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return (CN_DEAD);
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info->fb_height = efifb->fb_height;
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info->fb_width = efifb->fb_width;
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depth = fls(efifb->fb_mask_red);
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d = fls(efifb->fb_mask_green);
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depth = d > depth ? d : depth;
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d = fls(efifb->fb_mask_blue);
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depth = d > depth ? d : depth;
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d = fls(efifb->fb_mask_reserved);
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depth = d > depth ? d : depth;
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info->fb_depth = depth;
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info->fb_stride = efifb->fb_stride * (depth / 8);
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vt_generate_vga_palette(info->fb_cmap, COLOR_FORMAT_RGB,
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efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1,
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efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1,
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efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1);
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info->fb_size = info->fb_height * info->fb_stride;
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info->fb_pbase = efifb->fb_addr;
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/*
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* We could use pmap_mapdev here except that the kernel pmap
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* hasn't been created yet and hence any attempt to lock it will
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* fail.
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*/
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info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr);
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/* blank full size */
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len = info->fb_size / 4;
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for (i = 0; i < len; i++) {
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((uint32_t *)info->fb_vbase)[i] = 0;
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}
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/* Get pixel storage size. */
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info->fb_bpp = info->fb_stride / info->fb_width * 8;
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/*
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* Early FB driver work with static window buffer, so reduce to minimal
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* size, buffer or screen.
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*/
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info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH);
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info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT);
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fb_probe(info);
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vt_fb_init(vd);
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return (CN_INTERNAL);
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}
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