source: mainline/kernel/arch/ia32/src/drivers/vesa.c@ 33dc0ad

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 33dc0ad was b4fa652, checked in by Jakub Jermar <jakub@…>, 19 years ago

Support 24bpp framebuffers with 4 pixelbytes (each pixel aligned on 32-bits).

At least on sparc64, the OpenFirmware linebytes property specifies the number
of pixels between consecutive scan lines of the display. Fix scanilne calculation,
including possible alignment.

Add note to 8bpp pixel functions pointing out drawbacks of that mode.

  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 * Copyright (C) 2006 Jakub Vana
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup ia32
30 * @{
31 */
32/**
33 * @file
34 * @brief VESA frame buffer driver.
35 */
36
37#ifdef CONFIG_FB
38
39#include <genarch/fb/fb.h>
40#include <arch/drivers/vesa.h>
41#include <putchar.h>
42#include <mm/page.h>
43#include <mm/frame.h>
44#include <mm/as.h>
45#include <arch/mm/page.h>
46#include <synch/spinlock.h>
47#include <arch/asm.h>
48#include <arch/types.h>
49#include <typedefs.h>
50#include <memstr.h>
51#include <bitops.h>
52
53uint32_t vesa_ph_addr;
54uint16_t vesa_width;
55uint16_t vesa_height;
56uint16_t vesa_bpp;
57uint16_t vesa_scanline;
58
59int vesa_present(void)
60{
61 if (vesa_width != 0xffff)
62 return true;
63 if (vesa_height != 0xffff)
64 return true;
65 return false;
66}
67
68void vesa_init(void)
69{
70 fb_init(vesa_ph_addr, vesa_width, vesa_height, vesa_bpp, vesa_scanline, false);
71}
72
73#endif
74
75/** @}
76 */
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