int
lrcscan(struct device *parent, void *self, void *aux)
{
struct cfdata *cf = self;
struct lrcsoftc *sc = (struct lrcsoftc *)parent;
struct confargs *ca = aux;
struct confargs oca;
bzero(&oca, sizeof oca);
oca.ca_iot = ca->ca_iot;
oca.ca_dmat = ca->ca_dmat;
oca.ca_offset = cf->cf_loc[0];
oca.ca_ipl = cf->cf_loc[1];
if (oca.ca_offset != -1 && ISIIOVA(sc->sc_vaddr + oca.ca_offset)) {
oca.ca_vaddr = sc->sc_vaddr + oca.ca_offset;
oca.ca_paddr = sc->sc_paddr + oca.ca_offset;
} else {
oca.ca_vaddr = (vaddr_t)-1;
oca.ca_paddr = (paddr_t)-1;
}
oca.ca_bustype = BUS_LRC;
oca.ca_name = cf->cf_driver->cd_name;
if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
return (0);
config_attach(parent, cf, &oca, lrcprint);
return (1);
}
/*ARGSUSED*/
int
mmrw(dev_t dev, struct uio *uio, int flags)
{
vaddr_t o, v;
int c;
struct iovec *iov;
int error = 0;
static int physlock;
vm_prot_t prot;
if (minor(dev) == DEV_MEM) {
/* lock against other uses of shared vmmap */
while (physlock > 0) {
physlock++;
error = tsleep((void *)&physlock, PZERO | PCATCH,
"mmrw", 0);
if (error)
return error;
}
physlock = 1;
}
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
if (uio->uio_iovcnt < 0)
panic("mmrw");
continue;
}
switch (minor(dev)) {
case DEV_MEM:
v = uio->uio_offset;
/*
* Only allow reads in physical RAM.
*/
if (v >= 0xFFFFFFFC || v < lowram) {
error = EFAULT;
goto unlock;
}
prot = uio->uio_rw == UIO_READ ? VM_PROT_READ :
VM_PROT_WRITE;
pmap_enter(pmap_kernel(), (vaddr_t)vmmap,
trunc_page(v), prot, prot|PMAP_WIRED);
pmap_update(pmap_kernel());
o = m68k_page_offset(uio->uio_offset);
c = min(uio->uio_resid, (int)(PAGE_SIZE - o));
error = uiomove(vmmap + o, c, uio);
pmap_remove(pmap_kernel(), (vaddr_t)vmmap,
(vaddr_t)vmmap + PAGE_SIZE);
pmap_update(pmap_kernel());
continue;
case DEV_KMEM:
v = uio->uio_offset;
c = min(iov->iov_len, MAXPHYS);
if (!uvm_kernacc((void *)v, c,
uio->uio_rw == UIO_READ ? B_READ : B_WRITE))
return EFAULT;
/*
* Don't allow reading intio
* device space. This could lead to
* corruption of device registers.
*/
if (ISIIOVA(v))
return EFAULT;
error = uiomove((void *)v, c, uio);
continue;
case DEV_NULL:
if (uio->uio_rw == UIO_WRITE)
uio->uio_resid = 0;
return 0;
case DEV_ZERO:
if (uio->uio_rw == UIO_WRITE) {
c = iov->iov_len;
break;
}
/*
* On the first call, allocate and zero a page
* of memory for use with /dev/zero.
*/
if (devzeropage == NULL)
devzeropage = (void *)
malloc(PAGE_SIZE, M_TEMP, M_WAITOK|M_ZERO);
c = min(iov->iov_len, PAGE_SIZE);
error = uiomove(devzeropage, c, uio);
continue;
default:
return ENXIO;
}
if (error)
break;
iov->iov_base = (char *)iov->iov_base + c;
iov->iov_len -= c;
uio->uio_offset += c;
uio->uio_resid -= c;
}
if (minor(dev) == DEV_MEM) {
unlock:
if (physlock > 1)
wakeup((void *)&physlock);
physlock = 0;
}
return error;
}
