2 #include "../port/lib.h"
8 #include "../port/error.h"
16 Rectangle physgscreenr;
23 screensize(int x, int y, int, ulong chan)
33 if(memimageinit() < 0)
34 error("memimageinit failed");
38 unlock(&vgascreenlock);
43 scr->gscreendata = nil;
46 freememimage(gscreen);
51 if(scr->dev && scr->dev->page){
52 scr->vaddr = KADDR(VGAMEM());
58 gscreen = allocmemimage(Rect(0,0,x,y), chan);
64 if((md.bdata = scr->vaddr) == 0)
65 error("framebuffer not maped");
66 gscreen = allocmemimaged(Rect(0,0,x,y), chan, &md);
67 scr->useflush = scr->dev && scr->dev->flush;
70 error("no memory for vga memimage");
72 scr->palettedepth = 6; /* default */
73 scr->memdefont = getmemdefont();
74 scr->gscreen = gscreen;
75 scr->gscreendata = gscreen->data;
77 physgscreenr = gscreen->r;
81 unlock(&vgascreenlock);
94 screenaperture(int size, int align)
100 if(scr->paddr) /* set up during enable */
106 if(scr->dev && scr->dev->linear){
107 scr->dev->linear(scr, size, align);
112 * Need to allocate some physical address space.
113 * The driver will tell the card to use it.
115 size = PGROUND(size);
116 scr->paddr = upaalloc(size, align);
119 scr->vaddr = vmap(scr->paddr, size);
120 if(scr->vaddr == nil)
128 attachscreen(Rectangle* r, ulong* chan, int* d, int* width, int *softscreen)
133 if(scr->gscreen == nil || scr->gscreendata == nil)
136 *r = scr->gscreen->clipr;
137 *chan = scr->gscreen->chan;
138 *d = scr->gscreen->depth;
139 *width = scr->gscreen->width;
140 *softscreen = (scr->gscreendata->allocd || scr->useflush) ? 1 : 0;
142 scr->gscreendata->ref++;
143 return scr->gscreendata;
147 flushmemscreen(Rectangle r)
150 uchar *sp, *disp, *sdisp, *edisp;
151 int y, len, incs, off, page;
154 if(scr->gscreen == nil || scr->useflush == 0)
156 if(rectclip(&r, scr->gscreen->r) == 0)
158 if(scr->dev && scr->dev->flush){
159 scr->dev->flush(scr, r);
163 incs = scr->gscreen->width*sizeof(ulong);
164 off = (r.min.x*scr->gscreen->depth) / 8;
165 len = (r.max.x*scr->gscreen->depth + 7) / 8;
168 sp = scr->gscreendata->bdata + scr->gscreen->zero + off;
171 * Linear framebuffer with softscreen.
175 for(y = r.min.y; y < r.max.y; y++) {
176 memmove(sdisp, sp, len);
184 * Paged framebuffer window.
186 if(scr->dev == nil || scr->dev->page == nil)
189 page = off/scr->apsize;
192 edisp = disp+scr->apsize;
194 scr->dev->page(scr, page);
195 for(y = r.min.y; y < r.max.y; y++) {
196 if(sdisp + incs < edisp) {
197 memmove(sdisp, sp, len);
206 memmove(sdisp, sp, off);
207 scr->dev->page(scr, page);
209 memmove(disp, sp+off, len - off);
212 memmove(sdisp, sp, len);
213 scr->dev->page(scr, page);
216 sdisp += incs - scr->apsize;
222 getcolor(ulong p, ulong* pr, ulong* pg, ulong* pb)
228 if(scr->gscreen == nil)
231 switch(scr->gscreen->depth){
242 *pr = scr->colormap[p][0];
243 *pg = scr->colormap[p][1];
244 *pb = scr->colormap[p][2];
249 setpalette(ulong p, ulong r, ulong g, ulong b)
255 d = scr->palettedepth;
258 scr->colormap[p][0] = r;
259 scr->colormap[p][1] = g;
260 scr->colormap[p][2] = b;
262 vgao(Pdata, r>>(32-d));
263 vgao(Pdata, g>>(32-d));
264 vgao(Pdata, b>>(32-d));
271 * On some video cards (e.g. Mach64), the palette is used as the
272 * DAC registers for >8-bit modes. We don't want to set them when the user
273 * is trying to set a colormap and the card is in one of these modes.
276 setcolor(ulong p, ulong r, ulong g, ulong b)
282 if(scr->gscreen == nil)
285 switch(scr->gscreen->depth){
299 return setpalette(p, r, g, b);
305 swcursorload(&arrow);
314 swload(VGAscr*, Cursor *curs)
320 swmove(VGAscr*, Point p)
345 if(cur == nil || cur->move == nil)
351 cur->move(scr, mousexy());
363 setcursor(Cursor* curs)
368 if(scr->cur == nil || scr->cur->load == nil)
371 scr->cur->load(scr, curs);
379 hwdraw(Memdrawparam *par)
382 Memimage *dst, *src, *mask;
387 scrd = scr->gscreendata;
388 if(scr->gscreen == nil || scrd == nil)
390 if((dst = par->dst) == nil || dst->data == nil)
392 if((src = par->src) && src->data == nil)
394 if((mask = par->mask) && mask->data == nil)
396 if(scr->cur == &swcursor){
397 if(dst->data->bdata == scrd->bdata)
398 swcursoravoid(par->r);
399 if(src && src->data->bdata == scrd->bdata)
400 swcursoravoid(par->sr);
401 if(mask && mask->data->bdata == scrd->bdata)
402 swcursoravoid(par->mr);
404 if(!hwaccel || scr->softscreen)
406 if(dst->data->bdata != scrd->bdata || src == nil || mask == nil)
410 * If we have an opaque mask and source is one opaque
411 * pixel we can convert to the destination format and just
412 * replicate with memset.
414 m = Simplesrc|Simplemask|Fullmask;
417 && ((par->srgba&0xFF) == 0xFF)
419 return scr->fill(scr, par->r, par->sdval);
422 * If no source alpha, an opaque mask, we can just copy the
423 * source onto the destination. If the channels are the same and
424 * the source is not replicated, memmove suffices.
426 m = Simplemask|Fullmask;
428 && src->data->bdata==dst->data->bdata
429 && !(src->flags&Falpha)
432 return scr->scroll(scr, par->r, par->sr);
438 blankscreen(int blank)
445 scr->blank(scr, blank);
447 vgablank(scr, blank);
452 vgalinearaddr0(VGAscr *scr, ulong paddr, int size)
458 * new approach. instead of trying to resize this
459 * later, let's assume that we can just allocate the
460 * entire window to start with.
462 if(scr->paddr == paddr && size <= scr->apsize)
467 * could call vunmap and vmap,
468 * but worried about dangling pointers in devdraw
470 return "cannot grow vga frame buffer";
473 /* round to page boundary, just in case */
476 nsize = PGROUND(size+x);
479 * Don't bother trying to map more than 4000x4000x32 = 64MB.
480 * We only have a 256MB window.
484 scr->vaddr = vmap(npaddr, nsize);
486 return "cannot allocate vga frame buffer";
488 patwc(scr->vaddr, nsize);
490 scr->vaddr = (char*)scr->vaddr+x;
494 mtrr(npaddr, nsize, "wc");
500 vgalinearpci0(VGAscr *scr)
509 * Scan for largest memory region on card.
510 * Some S3 cards (e.g. Savage) have enormous
511 * mmio regions (but even larger frame buffers).
512 * Some 3dfx cards (e.g., Voodoo3) have mmio
513 * buffers the same size as the frame buffer,
514 * but only the frame buffer is marked as
515 * prefetchable (bar&8). If a card doesn't fit
516 * into these heuristics, its driver will have to
517 * call vgalinearaddr directly.
520 for(i=0; i<nelem(p->mem); i++){
521 if(p->mem[i].bar&1) /* not memory */
523 if(p->mem[i].size < 640*480) /* not big enough */
526 || p->mem[i].size > p->mem[best].size
527 || (p->mem[i].size == p->mem[best].size
529 && !(p->mem[best].bar&8)))
533 paddr = p->mem[best].bar & ~0x0F;
534 size = p->mem[best].size;
535 return vgalinearaddr0(scr, paddr, size);
537 return "no video memory found on pci card";
541 vgalinearpci(VGAscr *scr)
547 if((err = vgalinearpci0(scr)) != nil)
552 vgalinearaddr(VGAscr *scr, ulong paddr, int size)
556 if((err = vgalinearaddr0(scr, paddr, size)) != nil)
561 bootmapfb(VGAscr *scr, ulong pa, ulong sz)
567 for(p = pcimatch(nil, 0, 0); p != nil; p = pcimatch(p, 0, 0)){
568 for(i=0; i<nelem(p->mem); i++){
569 if(p->mem[i].bar & 1)
571 start = p->mem[i].bar & ~0xF;
572 end = start + p->mem[i].size;
573 if(pa == start && (pa + sz) <= end){
575 return vgalinearpci0(scr);
579 return vgalinearaddr0(scr, pa, sz);
583 rgbmask2chan(char *buf, int depth, u32int rm, u32int gm, u32int bm)
585 u32int m[4], dm; /* r,g,b,x */
595 m[3] = (~(m[0] | m[1] | m[2])) & dm;
600 for(n = 0; m[c] & (1<<n); n++)
603 m[0] >>= n, m[1] >>= n, m[2] >>= n, m[3] >>= n;
604 snprint(tmp, sizeof tmp, "%c%d%s", "rgbx"[c], n, buf);
613 * called early on boot to attach to framebuffer
614 * setup by bootloader/firmware or plan9.
625 /* *bootscreen=WIDTHxHEIGHTxDEPTH CHAN PA [SZ] */
626 s = getconf("*bootscreen");
630 x = strtoul(s, &s, 0);
631 if(x == 0 || *s++ != 'x')
634 y = strtoul(s, &s, 0);
635 if(y == 0 || *s++ != 'x')
638 z = strtoul(s, &s, 0);
641 if((p = strchr(++s, ' ')) == nil)
646 if(chan == 0 || chantodepth(chan) != z)
650 pa = strtoul(p+1, &s, 0);
654 sz = strtoul(s, nil, 0);
655 if(sz < x * y * (z+7)/8)
656 sz = x * y * (z+7)/8;
658 /* map framebuffer */
660 if((err = bootmapfb(scr, pa, sz)) != nil){
661 print("bootmapfb: %s\n", err);
665 if(memimageinit() < 0)
669 md.bdata = scr->vaddr;
670 gscreen = allocmemimaged(Rect(0,0,x,y), chan, &md);
674 scr->palettedepth = 6; /* default */
675 scr->memdefont = getmemdefont();
676 scr->gscreen = gscreen;
677 scr->gscreendata = gscreen->data;
682 physgscreenr = gscreen->r;
687 /* turn mouse cursor on */
689 scr->cur = &swcursor;
690 scr->cur->enable(scr);
697 * called from devvga when the framebuffer is setup
698 * to set *bootscreen= that can be passed on to a
699 * new kernel on reboot.
702 bootscreenconf(VGAscr *scr)
704 char conf[100], chan[30];
707 if(scr != nil && scr->paddr != 0 && scr->gscreen != nil)
708 snprint(conf, sizeof(conf), "%dx%dx%d %s %#p %d\n",
709 scr->gscreen->r.max.x, scr->gscreen->r.max.y,
710 scr->gscreen->depth, chantostr(chan, scr->gscreen->chan),
711 scr->paddr, scr->apsize);
712 ksetenv("*bootscreen", conf, 1);