1 /* $NetBSD: cgtworeg.h,v 1.6 2023/03/28 20:01:57 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Dennis Ferguson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* cgtworeg.h - CG2 colour frame buffer definitions 29 * 30 * The mapped memory looks like: 31 * 32 * offset contents 33 * 0x000000 bit plane map - 1st (of 8) plane used by the X server in -mono mode 34 * 0x100000 pixel map - used by the X server in color mode 35 * 0x200000 raster op mode memory map - unused by X server 36 * 0x300000 random control registers (lots of spaces in between) 37 * 0x310000 shadow colour map 38 */ 39 40 /* Frame buffer memory size and depth */ 41 #define CG2_FBSIZE (1024 * 1024) 42 #define CG2_N_PLANE 8 43 44 /* Screen dimensions */ 45 #define CG2_WIDTH 1152 46 #define CG2_HEIGHT 900 47 48 /* Colourmap size */ 49 #define CG2_CMSIZE 256 50 51 #define CG2_BITPLANE_OFF 0 52 #define CG2_BITPLANE_SIZE 0x100000 53 #define CG2_PIXMAP_OFF (CG2_BITPLANE_OFF + CG2_BITPLANE_SIZE) 54 #define CG2_PIXMAP_SIZE 0x100000 55 #define CG2_ROPMEM_OFF (CG2_PIXMAP_OFF + CG2_PIXMAP_SIZE) 56 #define CG2_ROPMEM_SIZE 0x100000 57 #define CG2_CTLREG_OFF (CG2_ROPMEM_OFF + CG2_ROPMEM_SIZE) 58 #define CG2_CTLREG_SIZE 0x010600 59 #define CG2_MAPPED_SIZE (CG2_CTLREG_OFF + CG2_CTLREG_SIZE) 60 61 62 /* arrangement of bit plane mode memory */ 63 union bitplane { 64 u_short word[CG2_HEIGHT][CG2_WIDTH/(CG2_N_PLANE * sizeof(u_short))]; 65 u_short plane[CG2_FBSIZE/(CG2_N_PLANE * sizeof(u_short))]; 66 }; 67 68 /* arrangement of pixel mode memory */ 69 union byteplane { 70 u_char pixel[CG2_HEIGHT][CG2_WIDTH]; 71 u_char frame[CG2_FBSIZE]; 72 }; 73 74 75 /* 76 * Structure describing the first two megabytes of the frame buffer. 77 * Normal memory maps in bit plane and pixel modes 78 */ 79 struct cg2memfb { 80 union bitplane memplane[CG2_N_PLANE]; /* bit plane map */ 81 union byteplane pixplane; /* pixel map */ 82 }; 83 84 85 /* 86 * Control/status register. The X server only appears to use update_cmap 87 * and video_enab. 88 */ 89 struct cg2statusreg { 90 u_int reserved : 2; /* not used */ 91 u_int fastread : 1; /* r/o: has some feature I don't understand */ 92 u_int id : 1; /* r/o: ext status and ID registers exist */ 93 u_int resolution : 4; /* screen resolution, 0 means 1152x900 */ 94 u_int retrace : 1; /* r/o: retrace in progress */ 95 u_int inpend : 1; /* r/o: interrupt request */ 96 u_int ropmode : 3; /* ?? */ 97 u_int inten : 1; /* interrupt enable (for end of retrace) */ 98 u_int update_cmap : 1; /* copy/use shadow colour map */ 99 u_int video_enab : 1; /* enable video */ 100 }; 101 102 103 /* 104 * Extended status register. Unused by X server 105 */ 106 struct cg2_extstatus { 107 u_int gpintreq : 1; /* interrupt request */ 108 u_int gpintdis : 1; /* interrupt disable */ 109 u_int reserved : 13; /* unused */ 110 u_int gpbus : 1; /* bus enabled */ 111 }; 112 113 114 /* 115 * Double buffer control register. It appears that (some of?) the 116 * cg2 cards support a pair of memory sets, referred to as `A' and 117 * `B', which can be swapped to allow atomic screen updates. This 118 * controls them. 119 */ 120 struct dblbufreg { 121 u_int display_b : 1; /* display memory B (set) or A (reset) */ 122 u_int read_b : 1; /* access memory B (set) or A (reset) */ 123 u_int nowrite_b : 1; /* when set, writes don't update memory B */ 124 u_int nowrite_a : 1; /* when set, writes don't update memory A */ 125 u_int read_ecmap : 1; /* copy from(clear)/to(set) shadow colour map */ 126 u_int fast_read : 1; /* fast reads, but wrong data */ 127 u_int wait : 1; /* when set, remains so to end up v. retrace */ 128 u_int update_ecmap : 1; /* copy/use shadow colour map */ 129 u_int reserved : 8; 130 }; 131 132 133 /* 134 * Zoom register, apparently present on Sun-2 colour boards only. See 135 * the Sun documentation, I don't know anyone who still has a Sun-2. 136 */ 137 struct cg2_zoom { 138 union { 139 u_short reg; 140 u_char reg_pad[4096]; 141 } wordpan; 142 union { 143 struct { 144 u_int unused : 8; 145 u_int lineoff : 4; 146 u_int pixzoom : 4; 147 } reg; 148 u_short word; 149 u_char reg_pad[4096]; 150 } zoom; 151 union { 152 struct { 153 u_int unused : 8; 154 u_int lorigin : 4; 155 u_int pixeloff : 4; 156 } reg; 157 u_short word; 158 u_char reg_pad[4096]; 159 } pixpan; 160 union { 161 u_short reg; 162 u_char reg_pad[4096]; 163 } varzoom; 164 }; 165 166 167 /* 168 * Miscellany. On the Sun-3 these registers exist in place of the above. 169 */ 170 struct cg2_nozoom { 171 union { /* double buffer register (see above) */ 172 struct dblbufreg reg; 173 u_short word; 174 u_char reg_pad[4096]; 175 } dblbuf; 176 union { /* start of DMA window */ 177 u_short reg; 178 u_char reg_pad[4096]; 179 } dmabase; 180 union { /* DMA window size */ 181 u_short reg; /* actually 8 bits. reg*16 == size */ 182 u_char reg_pad[4096]; 183 } dmawidth; 184 union { /* frame count */ 185 u_short reg; /* actually 8 bits only. r/o */ 186 u_char reg_pad[4096]; 187 } framecnt; 188 }; 189 190 191 /* 192 * Raster op control registers. X doesn't use this, but documented here 193 * for future reference. 194 */ 195 struct memropc { 196 u_short mrc_dest; 197 u_short mrc_source1; 198 u_short mrc_source2; 199 u_short mrc_pattern; 200 u_short mrc_mask1; 201 u_short mrc_mask2; 202 u_short mrc_shift; 203 u_short mrc_op; 204 u_short mrc_width; 205 u_short mrc_opcount; 206 u_short mrc_decoderout; 207 u_short mrc_x11; 208 u_short mrc_x12; 209 u_short mrc_x13; 210 u_short mrc_x14; 211 u_short mrc_x15; 212 }; 213 214 215 /* 216 * Last chunk of the frame buffer (i.e. from offset 0x200000 and above). 217 * Exists separately from struct cg2memfb apparently because Sun software 218 * avoids mapping the latter, though X uses it. 219 */ 220 struct cg2fb { 221 union { /* raster op mode frame memory */ 222 union bitplane ropplane[CG2_N_PLANE]; 223 union byteplane roppixel; 224 } ropio; 225 union { /* raster op control unit (1 per plane) */ 226 struct memropc ropregs; 227 struct { 228 u_char pad[2048]; 229 struct memropc ropregs; 230 } prime; 231 u_char reg_pad[4096]; 232 } ropcontrol[9]; 233 union { /* status register */ 234 struct cg2statusreg reg; 235 u_short word; 236 u_char reg_pad[4096]; 237 } status; 238 union { /* per-plane mask register */ 239 u_short reg; /* 8 bit mask register - set means plane r/w */ 240 u_char reg_pad[4096]; 241 } ppmask; 242 union { /* miscellaneous registers */ 243 struct cg2_zoom zoom; 244 struct cg2_nozoom nozoom; 245 } misc; 246 union { /* interrupt vector */ 247 u_short reg; 248 u_char reg_pad[32]; 249 } intrptvec; 250 union { /* board ID */ 251 u_short reg; 252 u_char reg_pad[16]; 253 } id; 254 union { /* extended status */ 255 struct cg2_extstatus reg; 256 u_short word; 257 u_char reg_pad[16]; 258 } extstatus; 259 union { /* auxiliary raster op mode register (?)*/ 260 u_short reg; 261 u_char reg_pad[4032]; 262 } ropmode; 263 u_short redmap[CG2_CMSIZE]; /* shadow colour maps */ 264 u_short greenmap[CG2_CMSIZE]; 265 u_short bluemap[CG2_CMSIZE]; 266 }; 267
Indexes created Sat Sep 20 22:09:52 GMT 2025