1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 Nathan Whitehorn 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/kernel.h> 31 #include <sys/systm.h> 32 #include <sys/fbio.h> 33 34 #include <dev/vt/vt.h> 35 #include <dev/vt/hw/fb/vt_fb.h> 36 #include <dev/vt/colors/vt_termcolors.h> 37 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 41 #include <machine/bus.h> 42 #include <machine/cpu.h> 43 44 #include <dev/ofw/openfirm.h> 45 #include <dev/ofw/ofw_bus.h> 46 #include <dev/ofw/ofw_pci.h> 47 #include <dev/ofw/ofw_subr.h> 48 49 struct ofwfb_softc { 50 struct fb_info fb; 51 52 phandle_t sc_node; 53 ihandle_t sc_handle; 54 bus_space_tag_t sc_memt; 55 int iso_palette; 56 int argb; 57 int endian_flip; 58 uint32_t vendor_id; 59 }; 60 61 #define PCI_VID_NVIDIA 0x10de /* NVIDIA Corporation */ 62 #define PCI_VID_ASPEED 0x1a03 /* ASPEED Technology, Inc. */ 63 64 static void ofwfb_initialize(struct vt_device *vd); 65 static vd_probe_t ofwfb_probe; 66 static vd_init_t ofwfb_init; 67 static vd_bitblt_text_t ofwfb_bitblt_text; 68 static vd_bitblt_bmp_t ofwfb_bitblt_bitmap; 69 static vd_bitblt_argb_t ofwfb_bitblt_argb; 70 71 static const struct vt_driver vt_ofwfb_driver = { 72 .vd_name = "ofwfb", 73 .vd_probe = ofwfb_probe, 74 .vd_init = ofwfb_init, 75 .vd_blank = vt_fb_blank, 76 .vd_bitblt_text = ofwfb_bitblt_text, 77 .vd_bitblt_bmp = ofwfb_bitblt_bitmap, 78 .vd_bitblt_argb = ofwfb_bitblt_argb, 79 .vd_fb_ioctl = vt_fb_ioctl, 80 .vd_fb_mmap = vt_fb_mmap, 81 .vd_priority = VD_PRIORITY_GENERIC+1, 82 }; 83 84 static unsigned char ofw_colors[16] = { 85 /* See "16-color Text Extension" Open Firmware document, page 4 */ 86 0, 4, 2, 6, 1, 5, 3, 7, 87 8, 12, 10, 14, 9, 13, 11, 15 88 }; 89 90 static struct ofwfb_softc ofwfb_conssoftc; 91 VT_DRIVER_DECLARE(vt_ofwfb, vt_ofwfb_driver); 92 93 static int 94 ofwfb_probe(struct vt_device *vd) 95 { 96 int disabled; 97 phandle_t chosen, node; 98 ihandle_t stdout; 99 char buf[64]; 100 101 disabled = 0; 102 TUNABLE_INT_FETCH("hw.ofwfb.disable", &disabled); 103 if (disabled) 104 return (CN_DEAD); 105 106 chosen = OF_finddevice("/chosen"); 107 if (chosen == -1) 108 return (CN_DEAD); 109 110 node = -1; 111 if (OF_getencprop(chosen, "stdout", &stdout, sizeof(stdout)) == 112 sizeof(stdout)) 113 node = OF_instance_to_package(stdout); 114 if (node == -1) 115 if (OF_getprop(chosen, "stdout-path", buf, sizeof(buf)) > 0) 116 node = OF_finddevice(buf); 117 if (node == -1) { 118 /* 119 * The "/chosen/stdout" does not exist try 120 * using "screen" directly. 121 */ 122 node = OF_finddevice("screen"); 123 } 124 OF_getprop(node, "device_type", buf, sizeof(buf)); 125 if (strcmp(buf, "display") != 0) 126 return (CN_DEAD); 127 128 /* Looks OK... */ 129 return (CN_INTERNAL); 130 } 131 132 static void 133 ofwfb_bitblt_bitmap(struct vt_device *vd, const struct vt_window *vw, 134 const uint8_t *pattern, const uint8_t *mask, 135 unsigned int width, unsigned int height, 136 unsigned int x, unsigned int y, term_color_t fg, term_color_t bg) 137 { 138 struct fb_info *sc = vd->vd_softc; 139 u_long line; 140 uint32_t fgc, bgc; 141 int c, l; 142 uint8_t b, m; 143 union { 144 uint32_t l; 145 uint8_t c[4]; 146 } ch1, ch2; 147 148 #ifdef __powerpc__ 149 /* Deal with unmapped framebuffers */ 150 if (sc->fb_flags & FB_FLAG_NOWRITE) { 151 if (pmap_bootstrapped) { 152 sc->fb_flags &= ~FB_FLAG_NOWRITE; 153 ofwfb_initialize(vd); 154 vd->vd_driver->vd_blank(vd, TC_BLACK); 155 } else { 156 return; 157 } 158 } 159 #endif 160 161 fgc = sc->fb_cmap[fg]; 162 bgc = sc->fb_cmap[bg]; 163 b = m = 0; 164 165 if (((struct ofwfb_softc *)vd->vd_softc)->iso_palette) { 166 fg = ofw_colors[fg]; 167 bg = ofw_colors[bg]; 168 } 169 170 line = (sc->fb_stride * y) + x * sc->fb_bpp/8; 171 if (mask == NULL && sc->fb_bpp == 8 && (width % 8 == 0)) { 172 /* Don't try to put off screen pixels */ 173 if (((x + width) > vd->vd_width) || ((y + height) > 174 vd->vd_height)) 175 return; 176 177 for (; height > 0; height--) { 178 for (c = 0; c < width; c += 8) { 179 b = *pattern++; 180 181 /* 182 * Assume that there is more background than 183 * foreground in characters and init accordingly 184 */ 185 ch1.l = ch2.l = (bg << 24) | (bg << 16) | 186 (bg << 8) | bg; 187 188 /* 189 * Calculate 2 x 4-chars at a time, and then 190 * write these out. 191 */ 192 if (b & 0x80) ch1.c[0] = fg; 193 if (b & 0x40) ch1.c[1] = fg; 194 if (b & 0x20) ch1.c[2] = fg; 195 if (b & 0x10) ch1.c[3] = fg; 196 197 if (b & 0x08) ch2.c[0] = fg; 198 if (b & 0x04) ch2.c[1] = fg; 199 if (b & 0x02) ch2.c[2] = fg; 200 if (b & 0x01) ch2.c[3] = fg; 201 202 *(uint32_t *)(sc->fb_vbase + line + c) = ch1.l; 203 *(uint32_t *)(sc->fb_vbase + line + c + 4) = 204 ch2.l; 205 } 206 line += sc->fb_stride; 207 } 208 } else { 209 for (l = 0; 210 l < height && y + l < vw->vw_draw_area.tr_end.tp_row; 211 l++) { 212 for (c = 0; 213 c < width && x + c < vw->vw_draw_area.tr_end.tp_col; 214 c++) { 215 if (c % 8 == 0) 216 b = *pattern++; 217 else 218 b <<= 1; 219 if (mask != NULL) { 220 if (c % 8 == 0) 221 m = *mask++; 222 else 223 m <<= 1; 224 /* Skip pixel write, if mask not set. */ 225 if ((m & 0x80) == 0) 226 continue; 227 } 228 switch(sc->fb_bpp) { 229 case 8: 230 *(uint8_t *)(sc->fb_vbase + line + c) = 231 b & 0x80 ? fg : bg; 232 break; 233 case 32: 234 *(uint32_t *)(sc->fb_vbase + line + 4*c) 235 = (b & 0x80) ? fgc : bgc; 236 break; 237 default: 238 /* panic? */ 239 break; 240 } 241 } 242 line += sc->fb_stride; 243 } 244 } 245 } 246 247 static int 248 ofwfb_bitblt_argb(struct vt_device *vd, const struct vt_window *vw, 249 const uint8_t *argb, 250 unsigned int width, unsigned int height, 251 unsigned int x, unsigned int y) 252 { 253 254 return (EOPNOTSUPP); 255 } 256 257 void 258 ofwfb_bitblt_text(struct vt_device *vd, const struct vt_window *vw, 259 const term_rect_t *area) 260 { 261 unsigned int col, row, x, y; 262 struct vt_font *vf; 263 term_char_t c; 264 term_color_t fg, bg; 265 const uint8_t *pattern; 266 267 vf = vw->vw_font; 268 269 for (row = area->tr_begin.tp_row; row < area->tr_end.tp_row; ++row) { 270 for (col = area->tr_begin.tp_col; col < area->tr_end.tp_col; 271 ++col) { 272 x = col * vf->vf_width + 273 vw->vw_draw_area.tr_begin.tp_col; 274 y = row * vf->vf_height + 275 vw->vw_draw_area.tr_begin.tp_row; 276 277 c = VTBUF_GET_FIELD(&vw->vw_buf, row, col); 278 pattern = vtfont_lookup(vf, c); 279 vt_determine_colors(c, 280 VTBUF_ISCURSOR(&vw->vw_buf, row, col), &fg, &bg); 281 282 ofwfb_bitblt_bitmap(vd, vw, 283 pattern, NULL, vf->vf_width, vf->vf_height, 284 x, y, fg, bg); 285 } 286 } 287 288 #ifndef SC_NO_CUTPASTE 289 if (!vd->vd_mshown) 290 return; 291 292 term_rect_t drawn_area; 293 294 drawn_area.tr_begin.tp_col = area->tr_begin.tp_col * vf->vf_width; 295 drawn_area.tr_begin.tp_row = area->tr_begin.tp_row * vf->vf_height; 296 drawn_area.tr_end.tp_col = area->tr_end.tp_col * vf->vf_width; 297 drawn_area.tr_end.tp_row = area->tr_end.tp_row * vf->vf_height; 298 299 if (vt_is_cursor_in_area(vd, &drawn_area)) { 300 ofwfb_bitblt_bitmap(vd, vw, 301 vd->vd_mcursor->map, vd->vd_mcursor->mask, 302 vd->vd_mcursor->width, vd->vd_mcursor->height, 303 vd->vd_mx_drawn + vw->vw_draw_area.tr_begin.tp_col, 304 vd->vd_my_drawn + vw->vw_draw_area.tr_begin.tp_row, 305 vd->vd_mcursor_fg, vd->vd_mcursor_bg); 306 } 307 #endif 308 } 309 310 311 /* 312 * Decode OpenFirmware/IEEE 1275-1994 "ranges" property 313 * 314 * XXX: this is similar to ofw_pcib_fill_ranges but cannot use it here because 315 * it's not possible to allocate memory at the moment this is funcion is 316 * used. Since there are other similar functions dealing with "ranges" 317 * property, a proper refactoring is suggested. 318 */ 319 static uint64_t 320 decode_pci_ranges_host_addr(phandle_t pcinode) 321 { 322 struct simplebus_range { 323 uint64_t bus; 324 uint64_t host; 325 uint64_t size; 326 }; 327 328 struct simplebus_range ranges[4]; 329 int nranges, host_address_cells; 330 pcell_t acells, scells; 331 cell_t base_ranges[64]; 332 333 ssize_t nbase_ranges; 334 int i, j, k; 335 336 if (!OF_hasprop(pcinode, "ranges")) 337 return (0); 338 339 if (OF_getencprop(pcinode, "#address-cells", &acells, sizeof(acells)) != 340 sizeof(acells)) 341 return (0); 342 343 if (OF_getencprop(pcinode, "#size-cells", &scells, sizeof(scells)) != 344 sizeof(scells)) 345 return (0); 346 347 if (OF_searchencprop(OF_parent(pcinode), "#address-cells", 348 &host_address_cells, sizeof(host_address_cells)) != 349 sizeof(host_address_cells)) 350 return (0); 351 352 nbase_ranges = OF_getproplen(pcinode, "ranges"); 353 nranges = nbase_ranges / sizeof(cell_t) / (acells + host_address_cells + scells); 354 355 /* prevent buffer overflow during iteration */ 356 if (nranges > sizeof(ranges) / sizeof(ranges[0])) 357 nranges = sizeof(ranges) / sizeof(ranges[0]); 358 359 /* decode range value and return the first valid address */ 360 OF_getencprop(pcinode, "ranges", base_ranges, nbase_ranges); 361 for (i = 0, j = 0; i < nranges; i++) { 362 ranges[i].bus = 0; 363 for (k = 0; k < acells; k++) { 364 ranges[i].bus <<= 32; 365 ranges[i].bus |= base_ranges[j++]; 366 } 367 368 ranges[i].host = 0; 369 for (k = 0; k < host_address_cells; k++) { 370 ranges[i].host <<= 32; 371 ranges[i].host |= base_ranges[j++]; 372 } 373 ranges[i].size = 0; 374 for (k = 0; k < scells; k++) { 375 ranges[i].size <<= 32; 376 ranges[i].size |= base_ranges[j++]; 377 } 378 379 if (ranges[i].host != 0) 380 return (ranges[i].host); 381 } 382 383 return (0); 384 } 385 386 static bus_addr_t 387 find_pci_host_address(phandle_t node) 388 { 389 uint64_t addr; 390 391 /* 392 * According to IEEE STD 1275, if property "ranges" exists but has a 393 * zero-length property value, the child address space is identical 394 * to the parent address space. 395 */ 396 while (node) { 397 if (OF_hasprop(node, "ranges")) { 398 addr = decode_pci_ranges_host_addr(node); 399 if (addr != 0) 400 return ((bus_addr_t)addr); 401 } 402 node = OF_parent(node); 403 } 404 405 return (0); 406 } 407 408 static void 409 ofwfb_initialize(struct vt_device *vd) 410 { 411 struct ofwfb_softc *sc = vd->vd_softc; 412 int i, err, r, g, b; 413 cell_t retval; 414 415 sc->fb.fb_cmsize = 16; 416 417 if (sc->fb.fb_flags & FB_FLAG_NOWRITE) 418 return; 419 420 /* 421 * Set up the color map 422 */ 423 424 sc->iso_palette = 0; 425 switch (sc->fb.fb_bpp) { 426 case 8: 427 /* 428 * No color format issues here, since we are passing the RGB 429 * components separately to Open Firmware. 430 */ 431 vt_config_cons_colors(&sc->fb, COLOR_FORMAT_RGB, 255, 432 16, 255, 8, 255, 0); 433 434 for (i = 0; i < 16; i++) { 435 err = OF_call_method("color!", sc->sc_handle, 4, 1, 436 (cell_t)((sc->fb.fb_cmap[i] >> 16) & 0xff), 437 (cell_t)((sc->fb.fb_cmap[i] >> 8) & 0xff), 438 (cell_t)((sc->fb.fb_cmap[i] >> 0) & 0xff), 439 (cell_t)i, &retval); 440 if (err) 441 break; 442 } 443 if (i != 16) 444 sc->iso_palette = 1; 445 446 break; 447 448 case 32: 449 /* 450 * There are two main color formats in use. 451 * ARGB32 is used mainly on hardware that was designed for 452 * LE systems, and RGBA32 is used mainly on hardware designed 453 * for BE systems. 454 * 455 * PowerMacs use either, depending on the video card option. 456 * NVidia cards tend to be RGBA32, and ATI cards tend to be ARGB32. 457 * 458 * There is no good way to determine the correct option, as this 459 * is independent of endian swapping. 460 */ 461 if (sc->vendor_id == PCI_VID_NVIDIA) 462 sc->argb = 0; 463 else 464 sc->argb = 1; 465 466 TUNABLE_INT_FETCH("hw.ofwfb.argb32_pixel", &sc->argb); 467 if (sc->endian_flip) { 468 if (sc->argb) 469 r = 8, g = 16, b = 24; 470 else 471 r = 24, g = 16, b = 8; 472 } else { 473 if (sc->argb) 474 r = 16, g = 8, b = 0; 475 else 476 r = 0, g = 8, b = 16; 477 } 478 vt_config_cons_colors(&sc->fb, 479 COLOR_FORMAT_RGB, 255, r, 255, g, 255, b); 480 break; 481 482 default: 483 panic("Unknown color space depth %d", sc->fb.fb_bpp); 484 break; 485 } 486 } 487 488 static int 489 ofwfb_init(struct vt_device *vd) 490 { 491 struct ofwfb_softc *sc; 492 char buf[64]; 493 phandle_t chosen; 494 phandle_t node; 495 pcell_t depth, height, width, stride; 496 uint32_t vendor_id = 0; 497 cell_t adr[2]; 498 uint64_t user_phys; 499 bus_addr_t fb_phys; 500 bus_size_t fb_phys_size; 501 int i, j, len; 502 503 /* Initialize softc */ 504 vd->vd_softc = sc = &ofwfb_conssoftc; 505 506 node = -1; 507 chosen = OF_finddevice("/chosen"); 508 if (OF_getencprop(chosen, "stdout", &sc->sc_handle, 509 sizeof(ihandle_t)) == sizeof(ihandle_t)) 510 node = OF_instance_to_package(sc->sc_handle); 511 if (node == -1) 512 /* Try "/chosen/stdout-path" now */ 513 if (OF_getprop(chosen, "stdout-path", buf, sizeof(buf)) > 0) { 514 node = OF_finddevice(buf); 515 if (node != -1) 516 sc->sc_handle = OF_open(buf); 517 } 518 if (node == -1) { 519 /* 520 * The "/chosen/stdout" does not exist try 521 * using "screen" directly. 522 */ 523 node = OF_finddevice("screen"); 524 sc->sc_handle = OF_open("screen"); 525 } 526 OF_getprop(node, "device_type", buf, sizeof(buf)); 527 if (strcmp(buf, "display") != 0) 528 return (CN_DEAD); 529 530 /* 531 * Retrieve vendor-id from /chosen parent node, usually pointing to 532 * video card device. This is used to select pixel format later on 533 * ofwfb_initialize() 534 */ 535 if (OF_getencprop(OF_parent(node), "vendor-id", &vendor_id, 536 sizeof(vendor_id)) == sizeof(vendor_id)) 537 sc->vendor_id = vendor_id; 538 539 /* Keep track of the OF node */ 540 sc->sc_node = node; 541 542 /* 543 * Try to use a 32-bit framebuffer if possible. This may be 544 * unimplemented and fail. That's fine -- it just means we are 545 * stuck with the defaults. 546 */ 547 OF_call_method("set-depth", sc->sc_handle, 1, 1, (cell_t)32, &i); 548 549 /* Make sure we have needed properties */ 550 if (OF_getproplen(node, "height") != sizeof(height) || 551 OF_getproplen(node, "width") != sizeof(width) || 552 OF_getproplen(node, "depth") != sizeof(depth)) 553 return (CN_DEAD); 554 555 /* Only support 8 and 32-bit framebuffers */ 556 OF_getencprop(node, "depth", &depth, sizeof(depth)); 557 if (depth != 8 && depth != 32) 558 return (CN_DEAD); 559 sc->fb.fb_bpp = sc->fb.fb_depth = depth; 560 561 OF_getencprop(node, "height", &height, sizeof(height)); 562 OF_getencprop(node, "width", &width, sizeof(width)); 563 if (OF_getencprop(node, "linebytes", &stride, sizeof(stride)) != 564 sizeof(stride)) 565 stride = width*depth/8; 566 567 568 sc->fb.fb_height = height; 569 sc->fb.fb_width = width; 570 sc->fb.fb_stride = stride; 571 sc->fb.fb_size = sc->fb.fb_height * sc->fb.fb_stride; 572 sc->endian_flip = 0; 573 574 #if defined(__powerpc__) 575 if (OF_hasprop(node, "little-endian")) { 576 sc->sc_memt = &bs_le_tag; 577 #if BYTE_ORDER == BIG_ENDIAN 578 sc->endian_flip = 1; 579 #endif 580 } else if (OF_hasprop(node, "big-endian")) { 581 sc->sc_memt = &bs_be_tag; 582 #if BYTE_ORDER == LITTLE_ENDIAN 583 sc->endian_flip = 1; 584 #endif 585 } 586 else { 587 /* Assume the framebuffer is in native endian. */ 588 #if BYTE_ORDER == BIG_ENDIAN 589 sc->sc_memt = &bs_be_tag; 590 #else 591 sc->sc_memt = &bs_le_tag; 592 #endif 593 } 594 #elif defined(__arm__) 595 sc->sc_memt = fdtbus_bs_tag; 596 #else 597 #error Unsupported platform! 598 #endif 599 600 601 /* 602 * Grab the physical address of the framebuffer, and then map it 603 * into our memory space. If the MMU is not yet up, it will be 604 * remapped for us when relocation turns on. 605 * 606 * The ASPEED driver on recent petitboot versions doesn't expose the 607 * physical address of framebuffer anymore for security. So it should 608 * retrieve the address from PCI device properties. 609 */ 610 user_phys = 0; 611 TUNABLE_UINT64_FETCH("hw.ofwfb.physaddr", &user_phys); 612 613 if (user_phys) 614 sc->fb.fb_pbase = (vm_paddr_t)user_phys; 615 else if (sc->vendor_id == PCI_VID_ASPEED) 616 sc->fb.fb_pbase = find_pci_host_address(node); 617 else if (OF_hasprop(node, "address")) { 618 619 switch (OF_getproplen(node, "address")) { 620 case 4: 621 OF_getencprop(node, "address", adr, 4); 622 fb_phys = adr[0]; 623 break; 624 case 8: 625 OF_getencprop(node, "address", adr, 8); 626 fb_phys = ((uint64_t)adr[0] << 32) | adr[1]; 627 break; 628 default: 629 /* Bad property? */ 630 return (CN_DEAD); 631 } 632 633 sc->fb.fb_pbase = (vm_paddr_t)fb_phys; 634 } else { 635 #if defined(__powerpc__) 636 /* 637 * Some IBM systems don't have an address property. Try to 638 * guess the framebuffer region from the assigned addresses. 639 * This is ugly, but there doesn't seem to be an alternative. 640 * Linux does the same thing. 641 */ 642 643 struct ofw_pci_register pciaddrs[8]; 644 int num_pciaddrs = 0; 645 646 /* 647 * Get the PCI addresses of the adapter, if present. The node 648 * may be the child of the PCI device: in that case, try the 649 * parent for the assigned-addresses property. 650 */ 651 len = OF_getencprop(node, "assigned-addresses", 652 (pcell_t *)pciaddrs, sizeof(pciaddrs)); 653 if (len == -1) { 654 len = OF_getencprop(OF_parent(node), "assigned-addresses", 655 (pcell_t *)pciaddrs, sizeof(pciaddrs)); 656 } 657 if (len == -1) 658 len = 0; 659 num_pciaddrs = len / sizeof(struct ofw_pci_register); 660 661 j = num_pciaddrs; 662 for (i = 0; i < num_pciaddrs; i++) { 663 /* If it is too small, not the framebuffer */ 664 if (pciaddrs[i].size_lo < sc->fb.fb_stride * height) 665 continue; 666 /* If it is not memory, it isn't either */ 667 if (!(pciaddrs[i].phys_hi & 668 OFW_PCI_PHYS_HI_SPACE_MEM32)) 669 continue; 670 671 /* This could be the framebuffer */ 672 j = i; 673 674 /* If it is prefetchable, it certainly is */ 675 if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) 676 break; 677 } 678 679 if (j == num_pciaddrs) /* No candidates found */ 680 return (CN_DEAD); 681 682 if (ofw_reg_to_paddr(node, j, &fb_phys, &fb_phys_size, NULL) < 0) 683 return (CN_DEAD); 684 685 sc->fb.fb_pbase = (vm_paddr_t)fb_phys; 686 #else 687 /* No ability to interpret assigned-addresses otherwise */ 688 return (CN_DEAD); 689 #endif 690 } 691 692 if (!sc->fb.fb_pbase) 693 return (CN_DEAD); 694 695 bus_space_map(sc->sc_memt, sc->fb.fb_pbase, sc->fb.fb_size, 696 BUS_SPACE_MAP_PREFETCHABLE, 697 (bus_space_handle_t *)&sc->fb.fb_vbase); 698 699 #if defined(__powerpc__) 700 /* 701 * If we are running on PowerPC in real mode (supported only on AIM 702 * CPUs), the frame buffer may be inaccessible (real mode does not 703 * necessarily cover all RAM) and may also be mapped with the wrong 704 * cache properties (all real mode accesses are assumed cacheable). 705 * Just don't write to it for the time being. 706 */ 707 if (!(cpu_features & PPC_FEATURE_BOOKE) && !(mfmsr() & PSL_DR)) 708 sc->fb.fb_flags |= FB_FLAG_NOWRITE; 709 #endif 710 ofwfb_initialize(vd); 711 vt_fb_init(vd); 712 713 return (CN_INTERNAL); 714 } 715