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 if(scr->gscreendata->allocd){
142 * we use a memimage as softscreen. devdraw will create its own
143 * screen image on the backing store of that image. when our gscreen
144 * and devdraws screenimage gets freed, the imagedata will
147 *softscreen = 0xa110c;
148 scr->gscreendata->ref++;
150 *softscreen = scr->useflush ? 1 : 0;
151 return scr->gscreendata->bdata;
155 flushmemscreen(Rectangle r)
158 uchar *sp, *disp, *sdisp, *edisp;
159 int y, len, incs, off, page;
162 if(scr->gscreen == nil || scr->useflush == 0)
164 if(rectclip(&r, scr->gscreen->r) == 0)
166 if(scr->dev && scr->dev->flush){
167 scr->dev->flush(scr, r);
171 incs = scr->gscreen->width*sizeof(ulong);
172 off = (r.min.x*scr->gscreen->depth) / 8;
173 len = (r.max.x*scr->gscreen->depth + 7) / 8;
176 sp = scr->gscreendata->bdata + scr->gscreen->zero + off;
179 * Linear framebuffer with softscreen.
183 for(y = r.min.y; y < r.max.y; y++) {
184 memmove(sdisp, sp, len);
192 * Paged framebuffer window.
194 if(scr->dev == nil || scr->dev->page == nil)
197 page = off/scr->apsize;
200 edisp = disp+scr->apsize;
202 scr->dev->page(scr, page);
203 for(y = r.min.y; y < r.max.y; y++) {
204 if(sdisp + incs < edisp) {
205 memmove(sdisp, sp, len);
214 memmove(sdisp, sp, off);
215 scr->dev->page(scr, page);
217 memmove(disp, sp+off, len - off);
220 memmove(sdisp, sp, len);
221 scr->dev->page(scr, page);
224 sdisp += incs - scr->apsize;
230 getcolor(ulong p, ulong* pr, ulong* pg, ulong* pb)
236 if(scr->gscreen == nil)
239 switch(scr->gscreen->depth){
250 *pr = scr->colormap[p][0];
251 *pg = scr->colormap[p][1];
252 *pb = scr->colormap[p][2];
257 setpalette(ulong p, ulong r, ulong g, ulong b)
263 d = scr->palettedepth;
266 scr->colormap[p][0] = r;
267 scr->colormap[p][1] = g;
268 scr->colormap[p][2] = b;
270 vgao(Pdata, r>>(32-d));
271 vgao(Pdata, g>>(32-d));
272 vgao(Pdata, b>>(32-d));
279 * On some video cards (e.g. Mach64), the palette is used as the
280 * DAC registers for >8-bit modes. We don't want to set them when the user
281 * is trying to set a colormap and the card is in one of these modes.
284 setcolor(ulong p, ulong r, ulong g, ulong b)
290 if(scr->gscreen == nil)
293 switch(scr->gscreen->depth){
307 return setpalette(p, r, g, b);
313 swcursorload(&arrow);
322 swload(VGAscr*, Cursor *curs)
328 swmove(VGAscr*, Point p)
353 if(cur == nil || cur->move == nil)
359 cur->move(scr, mousexy());
371 setcursor(Cursor* curs)
376 if(scr->cur == nil || scr->cur->load == nil)
379 scr->cur->load(scr, curs);
387 hwdraw(Memdrawparam *par)
390 Memimage *dst, *src, *mask;
395 scrd = scr->gscreendata;
396 if(scr->gscreen == nil || scrd == nil)
398 if((dst = par->dst) == nil || dst->data == nil)
400 if((src = par->src) && src->data == nil)
402 if((mask = par->mask) && mask->data == nil)
404 if(scr->cur == &swcursor){
405 if(dst->data->bdata == scrd->bdata)
406 swcursoravoid(par->r);
407 if(src && src->data->bdata == scrd->bdata)
408 swcursoravoid(par->sr);
409 if(mask && mask->data->bdata == scrd->bdata)
410 swcursoravoid(par->mr);
412 if(!hwaccel || scr->softscreen)
414 if(dst->data->bdata != scrd->bdata || src == nil || mask == nil)
418 * If we have an opaque mask and source is one opaque
419 * pixel we can convert to the destination format and just
420 * replicate with memset.
422 m = Simplesrc|Simplemask|Fullmask;
425 && ((par->srgba&0xFF) == 0xFF)
427 return scr->fill(scr, par->r, par->sdval);
430 * If no source alpha, an opaque mask, we can just copy the
431 * source onto the destination. If the channels are the same and
432 * the source is not replicated, memmove suffices.
434 m = Simplemask|Fullmask;
436 && src->data->bdata==dst->data->bdata
437 && !(src->flags&Falpha)
440 return scr->scroll(scr, par->r, par->sr);
446 blankscreen(int blank)
453 scr->blank(scr, blank);
455 vgablank(scr, blank);
460 vgalinearaddr0(VGAscr *scr, ulong paddr, int size)
466 * new approach. instead of trying to resize this
467 * later, let's assume that we can just allocate the
468 * entire window to start with.
470 if(scr->paddr == paddr && size <= scr->apsize)
475 * could call vunmap and vmap,
476 * but worried about dangling pointers in devdraw
478 return "cannot grow vga frame buffer";
481 /* round to page boundary, just in case */
484 nsize = PGROUND(size+x);
487 * Don't bother trying to map more than 4000x4000x32 = 64MB.
488 * We only have a 256MB window.
492 scr->vaddr = vmap(npaddr, nsize);
494 return "cannot allocate vga frame buffer";
496 patwc(scr->vaddr, nsize);
498 scr->vaddr = (char*)scr->vaddr+x;
502 mtrr(npaddr, nsize, "wc");
508 vgalinearpci0(VGAscr *scr)
517 * Scan for largest memory region on card.
518 * Some S3 cards (e.g. Savage) have enormous
519 * mmio regions (but even larger frame buffers).
520 * Some 3dfx cards (e.g., Voodoo3) have mmio
521 * buffers the same size as the frame buffer,
522 * but only the frame buffer is marked as
523 * prefetchable (bar&8). If a card doesn't fit
524 * into these heuristics, its driver will have to
525 * call vgalinearaddr directly.
528 for(i=0; i<nelem(p->mem); i++){
529 if(p->mem[i].bar&1) /* not memory */
531 if(p->mem[i].size < 640*480) /* not big enough */
534 || p->mem[i].size > p->mem[best].size
535 || (p->mem[i].size == p->mem[best].size
537 && !(p->mem[best].bar&8)))
541 paddr = p->mem[best].bar & ~0x0F;
542 size = p->mem[best].size;
543 return vgalinearaddr0(scr, paddr, size);
545 return "no video memory found on pci card";
549 vgalinearpci(VGAscr *scr)
555 if((err = vgalinearpci0(scr)) != nil)
560 vgalinearaddr(VGAscr *scr, ulong paddr, int size)
564 if((err = vgalinearaddr0(scr, paddr, size)) != nil)
569 bootmapfb(VGAscr *scr, ulong pa, ulong sz)
575 for(p = pcimatch(nil, 0, 0); p != nil; p = pcimatch(p, 0, 0)){
576 for(i=0; i<nelem(p->mem); i++){
577 if(p->mem[i].bar & 1)
579 start = p->mem[i].bar & ~0xF;
580 end = start + p->mem[i].size;
581 if(pa == start && (pa + sz) <= end){
583 return vgalinearpci0(scr);
587 return vgalinearaddr0(scr, pa, sz);
591 * called early on boot to attach to framebuffer
592 * setup by bootloader/firmware or plan9.
603 /* *bootscreen=WIDTHxHEIGHTxDEPTH CHAN PA [SZ] */
604 s = getconf("*bootscreen");
608 x = strtoul(s, &s, 0);
609 if(x == 0 || *s++ != 'x')
612 y = strtoul(s, &s, 0);
613 if(y == 0 || *s++ != 'x')
616 z = strtoul(s, &s, 0);
619 if((p = strchr(++s, ' ')) == nil)
624 if(chan == 0 || chantodepth(chan) != z)
628 pa = strtoul(p+1, &s, 0);
632 sz = strtoul(s, nil, 0);
633 if(sz < x * y * (z+7)/8)
634 sz = x * y * (z+7)/8;
636 /* map framebuffer */
638 if((err = bootmapfb(scr, pa, sz)) != nil){
639 print("bootmapfb: %s\n", err);
643 if(memimageinit() < 0)
647 md.bdata = scr->vaddr;
648 gscreen = allocmemimaged(Rect(0,0,x,y), chan, &md);
652 scr->palettedepth = 6; /* default */
653 scr->memdefont = getmemdefont();
654 scr->gscreen = gscreen;
655 scr->gscreendata = gscreen->data;
660 physgscreenr = gscreen->r;
665 /* turn mouse cursor on */
667 scr->cur = &swcursor;
668 scr->cur->enable(scr);
675 * called from devvga when the framebuffer is setup
676 * to set *bootscreen= that can be passed on to a
677 * new kernel on reboot.
680 bootscreenconf(VGAscr *scr)
682 char conf[100], chan[30];
685 if(scr != nil && scr->paddr != 0)
686 snprint(conf, sizeof(conf), "%dx%dx%d %s %#p %d\n",
687 scr->gscreen->r.max.x, scr->gscreen->r.max.y,
688 scr->gscreen->depth, chantostr(chan, scr->gscreen->chan),
689 scr->paddr, scr->apsize);
691 ksetenv("*bootscreen", conf, 1);