pcdisplay_subr.c revision 1.20
1 /* $NetBSD: pcdisplay_subr.c,v 1.20 2001/11/13 13:14:43 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: pcdisplay_subr.c,v 1.20 2001/11/13 13:14:43 lukem Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <machine/bus.h> 37 38 #include <dev/ic/mc6845reg.h> 39 #include <dev/ic/pcdisplayvar.h> 40 41 #include <dev/wscons/wsdisplayvar.h> 42 43 void 44 pcdisplay_cursor_init(scr, existing) 45 struct pcdisplayscreen *scr; 46 int existing; 47 { 48 #ifdef PCDISPLAY_SOFTCURSOR 49 bus_space_tag_t memt; 50 bus_space_handle_t memh; 51 int off; 52 53 pcdisplay_6845_write(scr->hdl, curstart, 0x10); 54 pcdisplay_6845_write(scr->hdl, curend, 0x10); 55 56 if (existing) { 57 /* 58 * This is the first screen. At this point, scr->mem is NULL 59 * (no backing store), so we can't use pcdisplay_cursor() to 60 * do this. 61 */ 62 memt = scr->hdl->ph_memt; 63 memh = scr->hdl->ph_memh; 64 off = (scr->vc_crow * scr->type->ncols + scr->vc_ccol) * 2 + 65 scr->dispoffset; 66 67 scr->cursortmp = bus_space_read_2(memt, memh, off); 68 bus_space_write_2(memt, memh, off, scr->cursortmp ^ 0x7700); 69 } else 70 scr->cursortmp = 0; 71 #else 72 /* 73 * Firmware might not have initialized the cursor shape. Make 74 * sure there's something we can see. 75 * Don't touch the hardware if this is not the first screen. 76 */ 77 if (existing) { 78 pcdisplay_6845_write(scr->hdl, curstart, 79 scr->type->fontheight - 2); 80 pcdisplay_6845_write(scr->hdl, curend, 81 scr->type->fontheight - 1); 82 } 83 #endif 84 scr->cursoron = 1; 85 } 86 87 void 88 pcdisplay_cursor(id, on, row, col) 89 void *id; 90 int on, row, col; 91 { 92 #ifdef PCDISPLAY_SOFTCURSOR 93 struct pcdisplayscreen *scr = id; 94 bus_space_tag_t memt = scr->hdl->ph_memt; 95 bus_space_handle_t memh = scr->hdl->ph_memh; 96 int off; 97 98 /* Remove old cursor image */ 99 if (scr->cursoron) { 100 off = scr->vc_crow * scr->type->ncols + scr->vc_ccol; 101 if (scr->active) 102 bus_space_write_2(memt, memh, scr->dispoffset + off * 2, 103 scr->cursortmp); 104 else 105 scr->mem[off] = scr->cursortmp; 106 } 107 108 scr->vc_crow = row; 109 scr->vc_ccol = col; 110 111 if ((scr->cursoron = on) == 0) 112 return; 113 114 off = (scr->vc_crow * scr->type->ncols + scr->vc_ccol); 115 if (scr->active) { 116 off = off * 2 + scr->dispoffset; 117 scr->cursortmp = bus_space_read_2(memt, memh, off); 118 bus_space_write_2(memt, memh, off, scr->cursortmp ^ 0x7700); 119 } else { 120 scr->cursortmp = scr->mem[off]; 121 scr->mem[off] = scr->cursortmp ^ 0x7700; 122 } 123 #else /* PCDISPLAY_SOFTCURSOR */ 124 struct pcdisplayscreen *scr = id; 125 int pos; 126 127 scr->vc_crow = row; 128 scr->vc_ccol = col; 129 scr->cursoron = on; 130 131 if (scr->active) { 132 if (!on) 133 pos = 0x3fff; 134 else 135 pos = scr->dispoffset / 2 136 + row * scr->type->ncols + col; 137 138 pcdisplay_6845_write(scr->hdl, cursorh, pos >> 8); 139 pcdisplay_6845_write(scr->hdl, cursorl, pos); 140 } 141 #endif /* PCDISPLAY_SOFTCURSOR */ 142 } 143 144 #if 0 145 unsigned int 146 pcdisplay_mapchar_simple(id, uni) 147 void *id; 148 int uni; 149 { 150 if (uni < 128) 151 return (uni); 152 153 return (1); /* XXX ??? smiley */ 154 } 155 #endif 156 157 void 158 pcdisplay_putchar(id, row, col, c, attr) 159 void *id; 160 int row, col; 161 u_int c; 162 long attr; 163 { 164 struct pcdisplayscreen *scr = id; 165 bus_space_tag_t memt = scr->hdl->ph_memt; 166 bus_space_handle_t memh = scr->hdl->ph_memh; 167 int off; 168 169 off = row * scr->type->ncols + col; 170 171 if (scr->active) 172 bus_space_write_2(memt, memh, scr->dispoffset + off * 2, 173 c | (attr << 8)); 174 else 175 scr->mem[off] = c | (attr << 8); 176 } 177 178 void 179 pcdisplay_copycols(id, row, srccol, dstcol, ncols) 180 void *id; 181 int row, srccol, dstcol, ncols; 182 { 183 struct pcdisplayscreen *scr = id; 184 bus_space_tag_t memt = scr->hdl->ph_memt; 185 bus_space_handle_t memh = scr->hdl->ph_memh; 186 bus_size_t srcoff, dstoff; 187 188 srcoff = dstoff = row * scr->type->ncols; 189 srcoff += srccol; 190 dstoff += dstcol; 191 192 if (scr->active) 193 bus_space_copy_region_2(memt, memh, 194 scr->dispoffset + srcoff * 2, 195 memh, scr->dispoffset + dstoff * 2, 196 ncols); 197 else 198 memcpy(&scr->mem[dstoff], &scr->mem[srcoff], ncols * 2); 199 } 200 201 void 202 pcdisplay_erasecols(id, row, startcol, ncols, fillattr) 203 void *id; 204 int row, startcol, ncols; 205 long fillattr; 206 { 207 struct pcdisplayscreen *scr = id; 208 bus_space_tag_t memt = scr->hdl->ph_memt; 209 bus_space_handle_t memh = scr->hdl->ph_memh; 210 bus_size_t off; 211 u_int16_t val; 212 int i; 213 214 off = row * scr->type->ncols + startcol; 215 216 val = (fillattr << 8) | ' '; 217 218 if (scr->active) 219 bus_space_set_region_2(memt, memh, scr->dispoffset + off * 2, 220 val, ncols); 221 else 222 for (i = 0; i < ncols; i++) 223 scr->mem[off + i] = val; 224 } 225 226 void 227 pcdisplay_copyrows(id, srcrow, dstrow, nrows) 228 void *id; 229 int srcrow, dstrow, nrows; 230 { 231 struct pcdisplayscreen *scr = id; 232 bus_space_tag_t memt = scr->hdl->ph_memt; 233 bus_space_handle_t memh = scr->hdl->ph_memh; 234 int ncols = scr->type->ncols; 235 bus_size_t srcoff, dstoff; 236 237 srcoff = srcrow * ncols + 0; 238 dstoff = dstrow * ncols + 0; 239 240 if (scr->active) 241 bus_space_copy_region_2(memt, memh, 242 scr->dispoffset + srcoff * 2, 243 memh, scr->dispoffset + dstoff * 2, 244 nrows * ncols); 245 else 246 memcpy(&scr->mem[dstoff], &scr->mem[srcoff], 247 nrows * ncols * 2); 248 } 249 250 void 251 pcdisplay_eraserows(id, startrow, nrows, fillattr) 252 void *id; 253 int startrow, nrows; 254 long fillattr; 255 { 256 struct pcdisplayscreen *scr = id; 257 bus_space_tag_t memt = scr->hdl->ph_memt; 258 bus_space_handle_t memh = scr->hdl->ph_memh; 259 bus_size_t off, count; 260 u_int16_t val; 261 int i; 262 263 off = startrow * scr->type->ncols; 264 count = nrows * scr->type->ncols; 265 266 val = (fillattr << 8) | ' '; 267 268 if (scr->active) 269 bus_space_set_region_2(memt, memh, scr->dispoffset + off * 2, 270 val, count); 271 else 272 for (i = 0; i < count; i++) 273 scr->mem[off + i] = val; 274 } 275
Indexes created Tue Sep 23 23:09:58 GMT 2025