/*
* Perform I/O within region in access units of accsz bytes.
* All units in bytes.
*/
static int32_t
regio(Reg *r, void *p, uint32_t len, uintptr_t off, int iswr)
{
Regio rio;
uintptr_t rp;
DBG("reg%s %s %#p %#ullx %#lx sz=%d\n",
iswr ? "out" : "in", r->name, p, off, len, r->accsz);
rp = 0;
if(off + len > r->len){
print("regio: access outside limits");
len = r->len - off;
}
if(len <= 0){
print("regio: zero len\n");
return 0;
}
switch(r->spc){
case Rsysmem:
// XXX should map only what we are going to use
// A region might be too large.
if(r->p == nil)
r->p = vmap(r->base, len);
if(r->p == nil)
error("regio: vmap failed");
rp = (uintptr_t)r->p + off;
rio = memio;
break;
case Rsysio:
rp = r->base + off;
rio = ioio;
break;
case Rpcicfg:
rp = r->base + off;
rio = cfgio;
rio.arg = r;
break;
case Rpcibar:
case Rembed:
case Rsmbus:
case Rcmos:
case Ripmi:
case Rfixedhw:
print("regio: reg %s not supported\n", acpiregstr(r->spc));
error("region not supported");
}
if(iswr)
regcpy(&rio, rp, &memio, (uintptr_t)p, len, r->accsz);
else
regcpy(&memio, (uintptr_t)p, &rio, rp, len, r->accsz);
return len;
}
// Copy the contents of the given region to dest. Return status.
int regvcpy(Value *destp,Region *regp) {
// Preallocate a string and copy.
if(vsalloc(destp,regp->r_size + 1) != 0)
return vrcset();
regcpy(destp->v_strp,regp);
return rc.status;
}
static void parse_url(URL *url, const char *str)
{
int i;
regcpy(url->url, str);
if(0 == memcmp(url->url, "udp://", 6))
{
i = 7;
url->ip = url->url + i;
while(':' != *(url->url + i)) {i++;}
*(url->url + i++) = '\0';
url->port = atoi(url->url + i);
url->protocol = PRTCL_UDP;
}
else
{
url->filename = url->url;
url->protocol = PRTCL_FILE;
}
}
