ref: 88ccea37f65b87312292b2b1a107c39927c6a2c3
dir: /sys/src/cmd/aux/vga/io.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
int curprintindex;
static int iobfd = -1;
static int iowfd = -1;
static int iolfd = -1;
static int biosfd = -1;
static int msrfd = -1;
enum {
Nctlchar = 256,
Nattr = 16,
};
static int ctlfd = -1;
static char ctlbuf[Nctlchar];
static int ctlclean;
static struct {
char* attr;
char* val;
} attr[Nattr];
static int
devopen(char* device, int mode)
{
int fd;
if((fd = open(device, mode)) < 0)
error("devopen(%s, %d): %r\n", device, mode);
return fd;
}
uchar
inportb(long port)
{
uchar data;
if(iobfd == -1)
iobfd = devopen("#P/iob", ORDWR);
if(pread(iobfd, &data, sizeof(data), port) != sizeof(data))
error("inportb(0x%4.4lx): %r\n", port);
return data;
}
void
outportb(long port, uchar data)
{
if(iobfd == -1)
iobfd = devopen("#P/iob", ORDWR);
if(pwrite(iobfd, &data, sizeof(data), port) != sizeof(data))
error("outportb(0x%4.4lx, 0x%2.2uX): %r\n", port, data);
}
ushort
inportw(long port)
{
ushort data;
if(iowfd == -1)
iowfd = devopen("#P/iow", ORDWR);
if(pread(iowfd, &data, sizeof(data), port) != sizeof(data))
error("inportw(0x%4.4lx): %r\n", port);
return data;
}
void
outportw(long port, ushort data)
{
if(iowfd == -1)
iowfd = devopen("#P/iow", ORDWR);
if(pwrite(iowfd, &data, sizeof(data), port) != sizeof(data))
error("outportw(0x%4.4lx, 0x%2.2uX): %r\n", port, data);
}
ulong
inportl(long port)
{
ulong data;
if(iolfd == -1)
iolfd = devopen("#P/iol", ORDWR);
if(pread(iolfd, &data, sizeof(data), port) != sizeof(data))
error("inportl(0x%4.4lx): %r\n", port);
return data;
}
void
outportl(long port, ulong data)
{
if(iolfd == -1)
iolfd = devopen("#P/iol", ORDWR);
if(pwrite(iolfd, &data, sizeof(data), port) != sizeof(data))
error("outportl(0x%4.4lx, 0x%2.2luX): %r\n", port, data);
}
uvlong
rdmsr(long port)
{
uvlong data;
if(msrfd == -1)
msrfd = devopen("#P/msr", ORDWR);
if(pread(msrfd, &data, sizeof(data), port) != sizeof(data))
error("rdmsr(0x%4.4lx): %r\n", port);
return data;
}
void
wrmsr(long port, uvlong data)
{
if(msrfd == -1)
msrfd = devopen("#P/msr", ORDWR);
if(pwrite(msrfd, &data, sizeof(data), port) != sizeof(data))
error("wrmsr(0x%4.4lx, 0x%2.2lluX): %r\n", port, data);
}
static void
vgactlinit(void)
{
int nattr;
char *nl, *p, *vp;
if(ctlclean)
return;
if(ctlfd == -1){
ctlfd = devopen("#v/vgactl", ORDWR);
memset(attr, 0, sizeof(attr));
}
seek(ctlfd, 0, 0);
nattr = read(ctlfd, ctlbuf, Nctlchar-1);
if(nattr < 0)
error("vgactlr: read: %r\n");
ctlbuf[nattr] = 0;
nattr = 0;
vp = ctlbuf;
for(nl = strchr(ctlbuf, '\n'); nl; nl = strchr(nl, '\n')){
*nl = '\0';
if(p = strchr(vp, ' ')){
*p++ = '\0';
attr[nattr].attr = vp;
if(*p == '\0')
error("vgactlr: bad format: <%s>\n", vp);
attr[nattr].val = p;
}
else
error("vgactlr: bad format: <%s>\n", vp);
if(++nattr >= Nattr-2)
error("vgactlr: too many attributes: %d\n", nattr);
attr[nattr].attr = 0;
vp = ++nl;
}
ctlclean = 1;
}
char*
vgactlr(char* a, char* v)
{
int i;
trace("vgactlr: look for %s\n", a);
vgactlinit();
for(i = 0; attr[i].attr; i++){
if(strcmp(attr[i].attr, a) == 0){
strcpy(v, attr[i].val);
trace("vgactlr: value %s\n", v);
return v;
}
}
trace("vgactlr: %s not found\n", a);
return 0;
}
void
vgactlw(char* attr, char* val)
{
int len;
char buf[128];
if(ctlfd == -1)
ctlfd = devopen("#v/vgactl", ORDWR);
seek(ctlfd, 0, 0);
len = sprint(buf, "%s %s", attr, val);
trace("+vgactlw %s\n", buf);
if(write(ctlfd, buf, len) != len)
error("vgactlw: <%s>: %r\n", buf);
trace("-vgactlw %s\n", buf);
ctlclean = 0;
}
void
vgactlpci(Pcidev *p)
{
char buf[64];
int len;
if(p == nil)
return;
if(ctlfd == -1)
ctlfd = devopen("#v/vgactl", ORDWR);
len = snprint(buf, sizeof(buf), "pcidev %lux", (ulong)p->tbdf);
seek(ctlfd, 0, 0);
/* ignore error for old kernel */
write(ctlfd, buf, len);
ctlclean = 0;
}
void
setpalette(int p, int r, int g, int b)
{
vgao(PaddrW, p);
vgao(Pdata, r);
vgao(Pdata, g);
vgao(Pdata, b);
}
static long
doreadbios(char* buf, long len, long offset)
{
if(biosfd < 0)
biosfd = open("/dev/realmodemem", OREAD);
if(biosfd < 0)
biosfd = open("#P/realmodemem", OREAD);
if(biosfd < 0)
return -1;
seek(biosfd, offset, 0);
return read(biosfd, buf, len);
}
char*
readbios(long len, long offset)
{
static char bios[0x10000];
static long biosoffset;
static long bioslen;
int n;
if(biosoffset <= offset && offset+len <= biosoffset+bioslen)
return bios+(offset - biosoffset);
if(len > sizeof(bios))
error("enormous bios len %ld at %lux\n", len, offset);
n = doreadbios(bios, sizeof(bios), offset);
if(n < len)
error("short bios read %ld at %lux got %d\n", len,offset, n);
biosoffset = offset;
bioslen = n;
return bios;
}
void
dumpbios(long size)
{
uchar *buf;
long offset;
int i, n;
char c;
buf = alloc(size);
offset = 0xC0000;
if(doreadbios((char*)buf, size, offset) != size)
error("short bios read in dumpbios\n");
if(buf[0] != 0x55 || buf[1] != 0xAA){
offset = 0xE0000;
if(doreadbios((char*)buf, size, offset) != size)
error("short bios read in dumpbios\n");
if(buf[0] != 0x55 || buf[1] != 0xAA){
free(buf);
return;
}
}
for(i = 0; i < size; i += 16){
Bprint(&stdout, "0x%luX", offset+i);
for(n = 0; n < 16; n++)
Bprint(&stdout, " %2.2uX", buf[i+n]);
Bprint(&stdout, " ");
for(n = 0; n < 16; n++){
c = buf[i+n];
if(c < 0x20 || c >= 0x7F)
c = '.';
Bprint(&stdout, "%c", c);
}
Bprint(&stdout, "\n");
}
free(buf);
}
void*
alloc(ulong nbytes)
{
void *v;
if((v = malloc(nbytes)) == 0)
error("alloc: %lud bytes - %r\n", nbytes);
return memset(v, 0, nbytes);
}
void
printitem(char* ctlr, char* item)
{
int n;
if(curprintindex){
curprintindex = 0;
Bprint(&stdout, "\n");
}
n = 0;
if(ctlr && *ctlr)
n = Bprint(&stdout, "%s ", ctlr);
Bprint(&stdout, "%-*s", 20-n, item);
}
void
printreg(ulong data)
{
int width;
width = 3;
if((curprintindex % 16) == 0 && curprintindex){
Bprint(&stdout, "\n");
curprintindex = 0;
width = 23;
}
if(curprintindex == 8)
Bprint(&stdout, " -");
Bprint(&stdout, "%*.2luX", width, data);
curprintindex++;
}
static char *flagname[32] = {
[0x00] "Fsnarf",
[0x01] "Foptions",
[0x02] "Finit",
[0x03] "Fload",
[0x04] "Fdump",
[0x08] "Hpclk2x8",
[0x09] "Upclk2x8",
[0x0A] "Henhanced",
[0x0B] "Uenhanced",
[0x0C] "Hpvram",
[0x0D] "Upvram",
[0x0E] "Hextsid",
[0x0F] "Uextsid",
[0x10] "Hclk2",
[0x11] "Uclk2",
[0x12] "Hlinear",
[0x13] "Ulinear",
[0x14] "Hclkdiv",
[0x15] "Uclkdiv",
[0x16] "Hsid32",
};
void
printflag(ulong flag)
{
int i;
char first;
first = ' ';
for(i = 31; i >= 0; i--){
if((flag & (1<<i)) == 0)
continue;
if(flagname[i])
Bprint(&stdout, "%c%s", first, flagname[i]);
else
Bprint(&stdout, "%c0x%x", first, 1<<i);
first = '|';
}
}