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2495fbf7ef
There were a set of pre-Kconfig configuration variables defined in the video code. There is absolutely no evidence that they have been tweaked by anybody in modern history, so just get rid of them and hope nobody notices. If someone does complain, these should be made real Kconfig variables. Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/* -*- linux-c -*- ------------------------------------------------------- *
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright 2007 rPath, Inc. - All Rights Reserved
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*
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* This file is part of the Linux kernel, and is made available under
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* the terms of the GNU General Public License version 2.
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*
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* ----------------------------------------------------------------------- */
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/*
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* Header file for the real-mode video probing code
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*/
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#ifndef BOOT_VIDEO_H
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#define BOOT_VIDEO_H
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#include <linux/types.h>
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/*
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* This code uses an extended set of video mode numbers. These include:
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* Aliases for standard modes
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* NORMAL_VGA (-1)
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* EXTENDED_VGA (-2)
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* ASK_VGA (-3)
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* Video modes numbered by menu position -- NOT RECOMMENDED because of lack
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* of compatibility when extending the table. These are between 0x00 and 0xff.
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*/
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#define VIDEO_FIRST_MENU 0x0000
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/* Standard BIOS video modes (BIOS number + 0x0100) */
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#define VIDEO_FIRST_BIOS 0x0100
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/* VESA BIOS video modes (VESA number + 0x0200) */
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#define VIDEO_FIRST_VESA 0x0200
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/* Video7 special modes (BIOS number + 0x0900) */
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#define VIDEO_FIRST_V7 0x0900
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/* Special video modes */
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#define VIDEO_FIRST_SPECIAL 0x0f00
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#define VIDEO_80x25 0x0f00
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#define VIDEO_8POINT 0x0f01
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#define VIDEO_80x43 0x0f02
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#define VIDEO_80x28 0x0f03
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#define VIDEO_CURRENT_MODE 0x0f04
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#define VIDEO_80x30 0x0f05
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#define VIDEO_80x34 0x0f06
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#define VIDEO_80x60 0x0f07
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#define VIDEO_GFX_HACK 0x0f08
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#define VIDEO_LAST_SPECIAL 0x0f09
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/* Video modes given by resolution */
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#define VIDEO_FIRST_RESOLUTION 0x1000
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/* The "recalculate timings" flag */
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#define VIDEO_RECALC 0x8000
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void store_screen(void);
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#define DO_STORE() store_screen()
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/*
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* Mode table structures
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*/
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struct mode_info {
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u16 mode; /* Mode number (vga= style) */
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u16 x, y; /* Width, height */
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u16 depth; /* Bits per pixel, 0 for text mode */
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};
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struct card_info {
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const char *card_name;
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int (*set_mode)(struct mode_info *mode);
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int (*probe)(void);
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struct mode_info *modes;
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int nmodes; /* Number of probed modes so far */
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int unsafe; /* Probing is unsafe, only do after "scan" */
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u16 xmode_first; /* Unprobed modes to try to call anyway */
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u16 xmode_n; /* Size of unprobed mode range */
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};
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#define __videocard struct card_info __attribute__((section(".videocards")))
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extern struct card_info video_cards[], video_cards_end[];
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int mode_defined(u16 mode); /* video.c */
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/* Basic video information */
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#define ADAPTER_CGA 0 /* CGA/MDA/HGC */
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#define ADAPTER_EGA 1
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#define ADAPTER_VGA 2
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extern int adapter;
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extern u16 video_segment;
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extern int force_x, force_y; /* Don't query the BIOS for cols/rows */
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extern int do_restore; /* Restore screen contents */
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extern int graphic_mode; /* Graphics mode with linear frame buffer */
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/* Accessing VGA indexed registers */
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static inline u8 in_idx(u16 port, u8 index)
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{
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outb(index, port);
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return inb(port+1);
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}
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static inline void out_idx(u8 v, u16 port, u8 index)
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{
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outw(index+(v << 8), port);
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}
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/* Writes a value to an indexed port and then reads the port again */
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static inline u8 tst_idx(u8 v, u16 port, u8 index)
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{
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out_idx(port, index, v);
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return in_idx(port, index);
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}
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/* Get the I/O port of the VGA CRTC */
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u16 vga_crtc(void); /* video-vga.c */
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#endif /* BOOT_VIDEO_H */
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