vaddr_t mman_alias_page(spdid_t s_spd, vaddr_t s_addr, spdid_t d_spd, vaddr_t d_addr)
{
struct mapping *m, *n;
vaddr_t ret = 0;
LOCK();
mm_init();
m = mapping_lookup(s_spd, s_addr);
if (!m) goto done; /* -EINVAL */
n = mapping_crt(m, m->f, d_spd, d_addr);
if (!n) goto done;
assert(n->addr == d_addr);
assert(n->spdid == d_spd);
assert(n->p == m);
ret = d_addr;
done:
UNLOCK();
return ret;
}
vaddr_t __mman_alias_page(spdid_t s_spd, vaddr_t s_addr, u32_t d_spd_flags, vaddr_t d_addr)
{
struct mapping *m, *n;
vaddr_t ret = 0;
spdid_t d_spd;
int flags;
d_spd = d_spd_flags >> 16;
flags = d_spd_flags & 0xFFFF;
LOCK();
m = mapping_lookup(s_spd, s_addr);
if (!m) goto done; /* -EINVAL */
n = mapping_crt(m, m->f, d_spd, d_addr, flags);
if (!n) goto done;
assert(n->addr == d_addr);
assert(n->spdid == d_spd);
assert(n->p == m);
ret = d_addr;
done:
UNLOCK();
return ret;
}
vaddr_t mman_get_page(spdid_t spd, vaddr_t addr, int flags)
{
struct frame *f;
struct mapping *m = NULL;
vaddr_t ret = -1;
LOCK();
mm_init();
f = frame_alloc();
if (!f) goto done; /* -ENOMEM */
frame_ref(f);
m = mapping_crt(NULL, f, spd, addr);
if (!m) goto dealloc;
assert(m->addr == addr);
assert(m->spdid == spd);
assert(m == mapping_lookup(spd, addr));
ret = m->addr;
done:
UNLOCK();
return ret;
dealloc:
frame_deref(f);
goto done; /* -EINVAL */
}
