From f0e3b2adcd59e21c1d882e8b432ac68e6245af71 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Tue, 17 Apr 2012 10:42:17 -0700 Subject: [PATCH] hw/vga.h: Header file for VGA hardware registers Header file for VGA hardware registers; so far only the base registers and sub-register indicies, but no bit masks or bit positions; those can be added as needed. Signed-off-by: H. Peter Anvin --- com32/include/hw/vga.h | 104 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 com32/include/hw/vga.h diff --git a/com32/include/hw/vga.h b/com32/include/hw/vga.h new file mode 100644 index 0000000..0ebd2e2 --- /dev/null +++ b/com32/include/hw/vga.h @@ -0,0 +1,104 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2012 Intel Corporation; author: H. Peter Anvin + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom + * the Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall + * be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * ----------------------------------------------------------------------- */ + +#ifndef _HW_VGA_H +#define _HW_VGA_H 1 + +#include + +/* These are relative to the CRTC base address */ +#define VGA_CRTC_ADDR 0x4 +#define VGA_CRTC_DATA 0x5 +#define VGA_CRTC_IX_HORIZ_TOTAL 0x00 +#define VGA_CRTC_IX_END_HORIZ_DISPLAY 0x01 +#define VGA_CRTC_IX_START_HORIZ_BLANK 0x02 +#define VGA_CRTC_IX_END_HORIZ_BLANK 0x03 +#define VGA_CRTC_IX_START_HORIZ_RETR 0x04 +#define VGA_CRTC_IX_END_HORIZ_RETR 0x05 +#define VGA_CRTC_IX_VERT_TOTAL 0x06 +#define VGA_CRTC_IX_OVERFLOW 0x07 +#define VGA_CRTC_IX_PRESET_ROW_SCAN 0x08 +#define VGA_CRTC_IX_MAX_SCAN_LINE 0x09 +#define VGA_CRTC_IX_CURSOR_START 0x0a +#define VGA_CRTC_IX_CURSOR_END 0x0b +#define VGA_CRTC_IX_START_ADDR_HIGH 0x0c +#define VGA_CRTC_IX_START_ADDR_LOW 0x0d +#define VGA_CRTC_IX_CURSOR_POS_HIGH 0x0e +#define VGA_CRTC_IX_CURSOR_POS_LOW 0x0f +#define VGA_CRTC_IX_START_VERT_RETR 0x10 +#define VGA_CRTC_IX_END_VERT_RETR 0x11 +#define VGA_CRTC_IX_END_VERT_DISPLAY 0x12 +#define VGA_CRTC_IX_OFFSET 0x13 +#define VGA_CRTC_IX_UNDERLINE 0x14 +#define VGA_CRTC_IX_START_VERT_BLANK 0x15 +#define VGA_CRTC_IX_END_VERT_BLANK 0x16 +#define VGA_CRTC_IX_MODE_CONTROL 0x17 +#define VGA_CRTC_IX_LINE_COMPARE 0x18 +#define VGA_CRTC_INPUT_STATUS_1 0xa +#define VGA_CRTC_FEATURE_CONTROL_WRITE 0xa + +#define VGA_ATTR_ADDR_DATA 0x3c0 +#define VGA_ATTR_DATA_READ 0x3c1 +/* 0x00-0x0f are 16->64 palette registers */ +#define VGA_ATTR_IX_MODE_CONTROL 0x10 +#define VGA_ATTR_IX_OVERSCAN 0x11 +#define VGA_ATTR_IX_COLOR_PLANE_ENABLE 0x12 +#define VGA_ATTR_IX_HORIZ_PIXEL_PAN 0x13 +#define VGA_ADDR_IX_COLOR_SELECT 0x14 +#define VGA_INPUT_STATUS_0 0x3c2 +#define VGA_MISC_OUTPUT_WRITE 0x3c2 +#define VGA_SEQ_ADDR 0x3c4 +#define VGA_SEQ_DATA 0x3c5 +#define VGA_SEQ_IX_RESET 0 +#define VGA_SEQ_IX_CLOCKMODE 1 +#define VGA_SEQ_IX_MAP_MASK 2 +#define VGA_SEQ_IX_CHAR_MAP 3 +#define VGA_SEQ_IX_SEQ_MEM_MODE 4 +#define VGA_DAC_STATE 0x3c7 +#define VGA_DAC_ADDR_READ_MODE 0x3c7 +#define VGA_DAC_ADDR_WRITE_MODE 0x3c8 +#define VGA_DAC_DATA 0x3c9 +#define VGA_FEATURE_CONTROL_READ 0x3ca +#define VGA_MISC_OUTPUT_READ 0x3cc +#define VGA_GC_ADDR 0x3ce +#define VGA_GC_DATA 0x3cf +#define VGA_GC_IX_SET_RESET 0 +#define VGA_GC_IX_ENABLE_SET_RESET 1 +#define VGA_GC_IX_COLOR_COMPARE 2 +#define VGA_GC_IX_DATA_ROTATE 3 +#define VGA_GC_IX_READ_MAP_SELECT 4 +#define VGA_GC_IX_GRAPHICS_MODE 5 +#define VGA_GC_IX_MISC_GRAPHICS 6 +#define VGA_GC_IX_COLOR_DONT_CARE 7 +#define VGA_GC_IX_BIT_MASK 8 + +static inline uint16_t vga_crtc_base(void) +{ + return 0x3b0 + ((inb(VGA_MISC_OUTPUT_READ) & 1) << 5); +} + +#endif /* _HW_VGA_H */ -- 2.7.4