static void
nvidiaenable(VGAscr* scr)
{
Pcidev *p;
ulong *q;
int tmp;
if(scr->mmio)
return;
p = scr->pci;
if(p == nil)
return;
scr->id = p->did;
scr->mmio = vmap(p->mem[0].bar & ~0x0F, p->mem[0].size);
if(scr->mmio == nil)
return;
addvgaseg("nvidiammio", p->mem[0].bar&~0x0F, p->mem[0].size);
vgalinearpci(scr);
if(scr->apsize)
addvgaseg("nvidiascreen", scr->paddr, scr->apsize);
/* find video memory size */
switch (scr->id & 0x0ff0) {
case 0x0020:
case 0x00A0:
q = (void*)((uchar*)scr->mmio + Pfb);
tmp = *q;
if (tmp & 0x0100) {
scr->storage = ((tmp >> 12) & 0x0F) * 1024 + 1024 * 2;
} else {
static void
tdfxenable(VGAscr* scr)
{
Pcidev *p;
int i, *mmio;
if(scr->mmio)
return;
if(p = pcimatch(nil, 0x121A, 0)){
switch(p->did){
case 0x0003: /* Banshee */
case 0x0005: /* Avenger (a.k.a. Voodoo3) */
break;
default:
return;
}
}
else
return;
scr->mmio = vmap(p->mem[0].bar&~0x0F, p->mem[0].size);
if(scr->mmio == nil)
return;
scr->pci = p;
addvgaseg("3dfxmmio", p->mem[0].bar&~0x0F, p->mem[0].size);
vgalinearpci(scr);
if(scr->apsize)
addvgaseg("3dfxscreen", scr->paddr, scr->apsize);
/*
* Find a place for the cursor data in display memory.
* If SDRAM then there's 16MB memory else it's SGRAM
* and can count it based on the power-on straps -
* chip size can be 8Mb or 16Mb, and there can be 4 or
* 8 of them.
* Use the last 1KB of the framebuffer.
*/
mmio = (void*)((uchar*)scr->mmio+dramInit0);
if(*(mmio+1) & 0x40000000)
i = 16*1024*1024;
else{
if(*mmio & 0x08000000)
i = 16*1024*1024/8;
else
i = 8*1024*1024/8;
if(*mmio & 0x04000000)
i *= 8;
else
i *= 4;
}
scr->storage = i - 1024;
}
void
vgalinearpciid(VGAscr *scr, int vid, int did)
{
Pcidev *p;
p = nil;
while((p = pcimatch(p, vid, 0)) != nil){
if(p->ccrb != 3) /* video card */
continue;
if(did != 0 && p->did != did)
continue;
break;
}
if(p == nil)
error("pci video card not found");
scr->pci = p;
vgalinearpci(scr);
}
