lx_vga.c revision f29dbc25 
1/*
2 * Copyright (c) 2006-2008 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 *
22 * Neither the name of the Advanced Micro Devices, Inc. nor the names of its
23 * contributors may be used to endorse or promote products derived from this
24 * software without specific prior written permission.
25 */
26
27/*
28 * This file contains routines to set modes using the VGA registers.
29 * Since this file is for the first generation graphics unit, it interfaces
30 * to SoftVGA registers.  It works for both VSA1 and VSA2.
31 */
32
33/* VGA STRUCTURE */
34
35int gu3_get_vga_active(void);
36
37int
38gu3_get_vga_active(void)
39{
40    int data = READ_REG32(DC3_GENERAL_CFG);
41
42    return (data & DC3_GCFG_VGAE) ? 1 : 0;
43}
44