annotate src/video/fbcon/3dfx_mmio.h @ 1662:782fd950bd46 SDL-1.3

Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
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children 99210400e8b9
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* 3Dfx register definitions */
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25
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26 #include "3dfx_regs.h"
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27
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28 /* 3Dfx control macros */
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29
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30 #define tdfx_in8(reg) *(volatile Uint8 *)(mapped_io + (reg))
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31 #define tdfx_in32(reg) *(volatile Uint32 *)(mapped_io + (reg))
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32
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33 #define tdfx_out8(reg,v) *(volatile Uint8 *)(mapped_io + (reg)) = v;
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34 #define tdfx_out32(reg,v) *(volatile Uint32 *)(mapped_io + (reg)) = v;
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35
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36
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37 /* Wait for fifo space */
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38 #define tdfx_wait(space) \
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39 { \
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40 while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space ) \
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41 ; \
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42 }
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44
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45 /* Wait for idle accelerator */
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46 #define tdfx_waitidle() \
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47 { \
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48 int i = 0; \
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49 \
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50 tdfx_wait(1); \
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51 tdfx_out32(COMMAND_3D, COMMAND_3D_NOP); \
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52 do { \
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53 i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1; \
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54 } while ( i != 3 ); \
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55 }
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56 /* vi: set ts=4 sw=4 expandtab: */