2 * Copyright (c) 2014 The FreeBSD Foundation
5 * This software was developed by Aleksandr Rybalko under sponsorship from the
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
39 #include <sys/linker.h>
41 #include "opt_platform.h"
43 #include <machine/metadata.h>
44 #include <machine/vm.h>
45 #include <machine/vmparam.h>
48 #include <machine/pmap.h>
50 #include <dev/vt/vt.h>
51 #include <dev/vt/hw/fb/vt_fb.h>
52 #include <dev/vt/colors/vt_termcolors.h>
54 static vd_init_t vt_efifb_init;
55 static vd_probe_t vt_efifb_probe;
56 static void vt_efifb_remap(void *efifb_data);
58 static struct vt_driver vt_efifb_driver = {
60 .vd_probe = vt_efifb_probe,
61 .vd_init = vt_efifb_init,
62 .vd_blank = vt_fb_blank,
63 .vd_bitbltchr = vt_fb_bitbltchr,
64 .vd_fb_ioctl = vt_fb_ioctl,
65 .vd_fb_mmap = vt_fb_mmap,
66 /* Better than VGA, but still generic driver. */
67 .vd_priority = VD_PRIORITY_GENERIC + 1,
70 static struct fb_info local_info;
71 VT_DRIVER_DECLARE(vt_efifb, vt_efifb_driver);
73 SYSINIT(efifb_remap, SI_SUB_KMEM, SI_ORDER_ANY, vt_efifb_remap, &local_info);
76 vt_efifb_probe(struct vt_device *vd)
83 TUNABLE_INT_FETCH("hw.syscons.disable", &disabled);
87 kmdp = preload_search_by_type("elf kernel");
89 kmdp = preload_search_by_type("elf64 kernel");
90 efifb = (struct efi_fb *)preload_search_info(kmdp,
91 MODINFO_METADATA | MODINFOMD_EFI_FB);
99 vt_efifb_init(struct vt_device *vd)
102 struct fb_info *info;
103 struct efi_fb *efifb;
108 info = vd->vd_softc = (void *)&local_info;
110 kmdp = preload_search_by_type("elf kernel");
112 kmdp = preload_search_by_type("elf64 kernel");
113 efifb = (struct efi_fb *)preload_search_info(kmdp,
114 MODINFO_METADATA | MODINFOMD_EFI_FB);
118 info->fb_height = efifb->fb_height;
119 info->fb_width = efifb->fb_width;
121 depth = fls(efifb->fb_mask_red);
122 d = fls(efifb->fb_mask_green);
123 depth = d > depth ? d : depth;
124 d = fls(efifb->fb_mask_blue);
125 depth = d > depth ? d : depth;
126 d = fls(efifb->fb_mask_reserved);
127 depth = d > depth ? d : depth;
128 info->fb_depth = depth;
130 info->fb_stride = efifb->fb_stride * (depth / 8);
132 vt_generate_cons_palette(info->fb_cmap, COLOR_FORMAT_RGB,
133 efifb->fb_mask_red, ffs(efifb->fb_mask_red) - 1,
134 efifb->fb_mask_green, ffs(efifb->fb_mask_green) - 1,
135 efifb->fb_mask_blue, ffs(efifb->fb_mask_blue) - 1);
137 info->fb_size = info->fb_height * info->fb_stride;
138 info->fb_pbase = efifb->fb_addr;
140 * Use the direct map as a crutch until pmap is available. Once pmap
141 * is online, the framebuffer will be remapped by vt_efifb_remap()
142 * using pmap_mapdev_attr().
144 info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr);
146 /* Get pixel storage size. */
147 info->fb_bpp = info->fb_stride / info->fb_width * 8;
150 * Early FB driver work with static window buffer, so reduce to minimal
151 * size, buffer or screen.
153 info->fb_width = MIN(info->fb_width, VT_FB_DEFAULT_WIDTH);
154 info->fb_height = MIN(info->fb_height, VT_FB_DEFAULT_HEIGHT);
158 return (CN_INTERNAL);
162 vt_efifb_remap(void *xinfo)
164 struct fb_info *info = xinfo;
166 if (info->fb_pbase == 0)
170 * Remap as write-combining. This massively improves performance and
171 * happens very early in kernel initialization, when everything is
172 * still single-threaded and interrupts are off, so replacing the
173 * mapping address is safe.
175 info->fb_vbase = (intptr_t)pmap_mapdev_attr(info->fb_pbase,
176 info->fb_size, VM_MEMATTR_WRITE_COMBINING);