2 #include "../port/lib.h"
8 #include "../port/error.h"
16 Rectangle physgscreenr;
24 { 0xFF, 0xFF, 0x80, 0x01, 0x80, 0x02, 0x80, 0x0C,
25 0x80, 0x10, 0x80, 0x10, 0x80, 0x08, 0x80, 0x04,
26 0x80, 0x02, 0x80, 0x01, 0x80, 0x02, 0x8C, 0x04,
27 0x92, 0x08, 0x91, 0x10, 0xA0, 0xA0, 0xC0, 0x40,
29 { 0x00, 0x00, 0x7F, 0xFE, 0x7F, 0xFC, 0x7F, 0xF0,
30 0x7F, 0xE0, 0x7F, 0xE0, 0x7F, 0xF0, 0x7F, 0xF8,
31 0x7F, 0xFC, 0x7F, 0xFE, 0x7F, 0xFC, 0x73, 0xF8,
32 0x61, 0xF0, 0x60, 0xE0, 0x40, 0x40, 0x00, 0x00,
37 screensize(int x, int y, int, ulong chan)
47 if(memimageinit() < 0)
48 error("memimageinit failed");
52 unlock(&vgascreenlock);
57 scr->gscreendata = nil;
60 freememimage(gscreen);
65 if(scr->dev && scr->dev->page){
66 scr->vaddr = KADDR(VGAMEM());
72 gscreen = allocmemimage(Rect(0,0,x,y), chan);
78 if((md.bdata = scr->vaddr) == 0)
79 error("framebuffer not maped");
80 gscreen = allocmemimaged(Rect(0,0,x,y), chan, &md);
81 scr->useflush = scr->dev && scr->dev->flush;
84 error("no memory for vga memimage");
86 scr->palettedepth = 6; /* default */
87 scr->memdefont = getmemdefont();
88 scr->gscreen = gscreen;
89 scr->gscreendata = gscreen->data;
91 physgscreenr = gscreen->r;
95 unlock(&vgascreenlock);
108 screenaperture(int size, int align)
114 if(scr->paddr) /* set up during enable */
120 if(scr->dev && scr->dev->linear){
121 scr->dev->linear(scr, size, align);
126 * Need to allocate some physical address space.
127 * The driver will tell the card to use it.
129 size = PGROUND(size);
130 scr->paddr = upaalloc(size, align);
133 scr->vaddr = vmap(scr->paddr, size);
134 if(scr->vaddr == nil)
142 attachscreen(Rectangle* r, ulong* chan, int* d, int* width, int *softscreen)
147 if(scr->gscreen == nil || scr->gscreendata == nil)
150 *r = scr->gscreen->clipr;
151 *chan = scr->gscreen->chan;
152 *d = scr->gscreen->depth;
153 *width = scr->gscreen->width;
154 if(scr->gscreendata->allocd){
156 * we use a memimage as softscreen. devdraw will create its own
157 * screen image on the backing store of that image. when our gscreen
158 * and devdraws screenimage gets freed, the imagedata will
161 *softscreen = 0xa110c;
162 scr->gscreendata->ref++;
164 *softscreen = scr->useflush ? 1 : 0;
165 return scr->gscreendata->bdata;
169 flushmemscreen(Rectangle r)
172 uchar *sp, *disp, *sdisp, *edisp;
173 int y, len, incs, off, page;
176 if(scr->gscreen == nil || scr->useflush == 0)
178 if(rectclip(&r, scr->gscreen->r) == 0)
180 if(scr->dev && scr->dev->flush){
181 scr->dev->flush(scr, r);
185 incs = scr->gscreen->width*sizeof(ulong);
186 off = (r.min.x*scr->gscreen->depth) / 8;
187 len = (r.max.x*scr->gscreen->depth + 7) / 8;
190 sp = scr->gscreendata->bdata + scr->gscreen->zero + off;
193 * Linear framebuffer with softscreen.
197 for(y = r.min.y; y < r.max.y; y++) {
198 memmove(sdisp, sp, len);
206 * Paged framebuffer window.
208 if(scr->dev == nil || scr->dev->page == nil)
211 page = off/scr->apsize;
214 edisp = disp+scr->apsize;
216 scr->dev->page(scr, page);
217 for(y = r.min.y; y < r.max.y; y++) {
218 if(sdisp + incs < edisp) {
219 memmove(sdisp, sp, len);
228 memmove(sdisp, sp, off);
229 scr->dev->page(scr, page);
231 memmove(disp, sp+off, len - off);
234 memmove(sdisp, sp, len);
235 scr->dev->page(scr, page);
238 sdisp += incs - scr->apsize;
244 getcolor(ulong p, ulong* pr, ulong* pg, ulong* pb)
250 if(scr->gscreen == nil)
253 switch(scr->gscreen->depth){
264 *pr = scr->colormap[p][0];
265 *pg = scr->colormap[p][1];
266 *pb = scr->colormap[p][2];
271 setpalette(ulong p, ulong r, ulong g, ulong b)
277 d = scr->palettedepth;
280 scr->colormap[p][0] = r;
281 scr->colormap[p][1] = g;
282 scr->colormap[p][2] = b;
284 vgao(Pdata, r>>(32-d));
285 vgao(Pdata, g>>(32-d));
286 vgao(Pdata, b>>(32-d));
293 * On some video cards (e.g. Mach64), the palette is used as the
294 * DAC registers for >8-bit modes. We don't want to set them when the user
295 * is trying to set a colormap and the card is in one of these modes.
298 setcolor(ulong p, ulong r, ulong g, ulong b)
304 if(scr->gscreen == nil)
307 switch(scr->gscreen->depth){
321 return setpalette(p, r, g, b);
327 swcursorload(&arrow);
336 swload(VGAscr*, Cursor *curs)
342 swmove(VGAscr*, Point p)
367 if(cur == nil || cur->move == nil)
373 cur->move(scr, mousexy());
385 setcursor(Cursor* curs)
390 if(scr->cur == nil || scr->cur->load == nil)
393 scr->cur->load(scr, curs);
397 int hwblank = 0; /* turned on by drivers that are known good */
401 hwdraw(Memdrawparam *par)
404 Memimage *dst, *src, *mask;
409 scrd = scr->gscreendata;
410 if(scr->gscreen == nil || scrd == nil)
412 if((dst = par->dst) == nil || dst->data == nil)
414 if((src = par->src) && src->data == nil)
416 if((mask = par->mask) && mask->data == nil)
418 if(scr->cur == &swcursor){
419 if(dst->data->bdata == scrd->bdata)
420 swcursoravoid(par->r);
421 if(src && src->data->bdata == scrd->bdata)
422 swcursoravoid(par->sr);
423 if(mask && mask->data->bdata == scrd->bdata)
424 swcursoravoid(par->mr);
428 if(dst->data->bdata != scrd->bdata || src == nil || mask == nil)
430 if(scr->fill==nil && scr->scroll==nil)
434 * If we have an opaque mask and source is one opaque
435 * pixel we can convert to the destination format and just
436 * replicate with memset.
438 m = Simplesrc|Simplemask|Fullmask;
441 && ((par->srgba&0xFF) == 0xFF)
443 return scr->fill(scr, par->r, par->sdval);
446 * If no source alpha, an opaque mask, we can just copy the
447 * source onto the destination. If the channels are the same and
448 * the source is not replicated, memmove suffices.
450 m = Simplemask|Fullmask;
452 && src->data->bdata==dst->data->bdata
453 && !(src->flags&Falpha)
456 return scr->scroll(scr, par->r, par->sr);
462 blankscreen(int blank)
469 scr->blank(scr, blank);
471 vgablank(scr, blank);
476 vgalinearaddr0(VGAscr *scr, ulong paddr, int size)
482 * new approach. instead of trying to resize this
483 * later, let's assume that we can just allocate the
484 * entire window to start with.
486 if(scr->paddr == paddr && size <= scr->apsize)
491 * could call vunmap and vmap,
492 * but worried about dangling pointers in devdraw
494 return "cannot grow vga frame buffer";
497 /* round to page boundary, just in case */
500 nsize = PGROUND(size+x);
503 * Don't bother trying to map more than 4000x4000x32 = 64MB.
504 * We only have a 256MB window.
508 scr->vaddr = vmap(npaddr, nsize);
510 return "cannot allocate vga frame buffer";
511 scr->vaddr = (char*)scr->vaddr+x;
515 mtrr(npaddr, nsize, "wc");
521 vgalinearpci0(VGAscr *scr)
530 * Scan for largest memory region on card.
531 * Some S3 cards (e.g. Savage) have enormous
532 * mmio regions (but even larger frame buffers).
533 * Some 3dfx cards (e.g., Voodoo3) have mmio
534 * buffers the same size as the frame buffer,
535 * but only the frame buffer is marked as
536 * prefetchable (bar&8). If a card doesn't fit
537 * into these heuristics, its driver will have to
538 * call vgalinearaddr directly.
541 for(i=0; i<nelem(p->mem); i++){
542 if(p->mem[i].bar&1) /* not memory */
544 if(p->mem[i].size < 640*480) /* not big enough */
547 || p->mem[i].size > p->mem[best].size
548 || (p->mem[i].size == p->mem[best].size
550 && !(p->mem[best].bar&8)))
554 paddr = p->mem[best].bar & ~0x0F;
555 size = p->mem[best].size;
556 return vgalinearaddr0(scr, paddr, size);
558 return "no video memory found on pci card";
562 vgalinearpci(VGAscr *scr)
568 if((err = vgalinearpci0(scr)) != nil)
573 vgalinearaddr(VGAscr *scr, ulong paddr, int size)
577 if((err = vgalinearaddr0(scr, paddr, size)) != nil)
582 bootmapfb(VGAscr *scr, ulong pa, ulong sz)
588 for(p = pcimatch(nil, 0, 0); p != nil; p = pcimatch(p, 0, 0)){
589 for(i=0; i<nelem(p->mem); i++){
590 if(p->mem[i].bar & 1)
592 start = p->mem[i].bar & ~0xF;
593 end = start + p->mem[i].size;
594 if(pa == start && (pa + sz) <= end){
596 return vgalinearpci0(scr);
600 return vgalinearaddr0(scr, pa, sz);
604 * called early on boot to attach to framebuffer
605 * setup by bootloader or firmware.
616 /* *bootscreen=WIDTHxHEIGHTxDEPTH CHAN PA [SZ] */
617 s = getconf("*bootscreen");
621 x = strtoul(s, &s, 0);
622 if(x == 0 || *s++ != 'x')
625 y = strtoul(s, &s, 0);
626 if(y == 0 || *s++ != 'x')
629 z = strtoul(s, &s, 0);
632 if((p = strchr(++s, ' ')) == nil)
637 if(chan == 0 || chantodepth(chan) != z)
641 pa = strtoul(p+1, &s, 0);
645 sz = strtoul(s, nil, 0);
646 if(sz < x * y * (z+7)/8)
647 sz = x * y * (z+7)/8;
649 /* map framebuffer */
651 if((err = bootmapfb(scr, pa, sz)) != nil){
652 print("bootmapfb: %s\n", err);
656 if(memimageinit() < 0)
660 md.bdata = scr->vaddr;
661 gscreen = allocmemimaged(Rect(0,0,x,y), chan, &md);
665 scr->palettedepth = 6; /* default */
666 scr->memdefont = getmemdefont();
667 scr->gscreen = gscreen;
668 scr->gscreendata = gscreen->data;
676 physgscreenr = gscreen->r;
681 /* turn mouse cursor on */
683 scr->cur = &swcursor;
684 scr->cur->enable(scr);