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 <hpa@linux.intel.com>

diff --git a/com32/include/hw/vga.h b/com32/include/hw/vga.h
new file mode 100644 (file)
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 <sys/io.h>
+
+/* 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 */