void *
uma_small_alloc(uma_zone_t zone, vm_size_t bytes, u_int8_t *flags, int wait)
{
vm_paddr_t pa;
vm_page_t m;
int pflags;
void *va;
PMAP_STATS_INC(uma_nsmall_alloc);
*flags = UMA_SLAB_PRIV;
pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED;
for (;;) {
m = vm_page_alloc(NULL, 0, pflags | VM_ALLOC_NOOBJ);
if (m == NULL) {
if (wait & M_NOWAIT)
return (NULL);
else
VM_WAIT;
} else
break;
}
pa = VM_PAGE_TO_PHYS(m);
if (dcache_color_ignore == 0 && m->md.color != DCACHE_COLOR(pa)) {
KASSERT(m->md.colors[0] == 0 && m->md.colors[1] == 0,
("uma_small_alloc: free page %p still has mappings!", m));
PMAP_STATS_INC(uma_nsmall_alloc_oc);
m->md.color = DCACHE_COLOR(pa);
dcache_page_inval(pa);
}
va = (void *)TLB_PHYS_TO_DIRECT(pa);
if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
cpu_block_zero(va, PAGE_SIZE);
return (va);
}
/*
* Implement uiomove(9) from physical memory using a combination
* of the direct mapping and sf_bufs to reduce the creation and
* destruction of ephemeral mappings.
*/
int
uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
{
struct sf_buf *sf;
struct thread *td = curthread;
struct iovec *iov;
void *cp;
vm_offset_t page_offset;
vm_paddr_t pa;
vm_page_t m;
size_t cnt;
int error = 0;
int save = 0;
KASSERT(uio->uio_rw == UIO_READ || uio->uio_rw == UIO_WRITE,
("uiomove_fromphys: mode"));
KASSERT(uio->uio_segflg != UIO_USERSPACE || uio->uio_td == curthread,
("uiomove_fromphys proc"));
save = td->td_pflags & TDP_DEADLKTREAT;
td->td_pflags |= TDP_DEADLKTREAT;
while (n > 0 && uio->uio_resid) {
iov = uio->uio_iov;
cnt = iov->iov_len;
if (cnt == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
continue;
}
if (cnt > n)
cnt = n;
page_offset = offset & PAGE_MASK;
cnt = ulmin(cnt, PAGE_SIZE - page_offset);
m = ma[offset >> PAGE_SHIFT];
pa = VM_PAGE_TO_PHYS(m);
if (m->md.color != DCACHE_COLOR(pa)) {
sf = sf_buf_alloc(m, 0);
cp = (char *)sf_buf_kva(sf) + page_offset;
} else {
sf = NULL;
cp = (char *)TLB_PHYS_TO_DIRECT(pa) + page_offset;
}
switch (uio->uio_segflg) {
case UIO_USERSPACE:
if (ticks - PCPU_GET(switchticks) >= hogticks)
uio_yield();
if (uio->uio_rw == UIO_READ)
error = copyout(cp, iov->iov_base, cnt);
else
error = copyin(iov->iov_base, cp, cnt);
if (error) {
if (sf != NULL)
sf_buf_free(sf);
goto out;
}
break;
case UIO_SYSSPACE:
if (uio->uio_rw == UIO_READ)
bcopy(cp, iov->iov_base, cnt);
else
bcopy(iov->iov_base, cp, cnt);
break;
case UIO_NOCOPY:
break;
}
if (sf != NULL)
sf_buf_free(sf);
iov->iov_base = (char *)iov->iov_base + cnt;
iov->iov_len -= cnt;
uio->uio_resid -= cnt;
uio->uio_offset += cnt;
offset += cnt;
n -= cnt;
}
out:
if (save == 0)
td->td_pflags &= ~TDP_DEADLKTREAT;
return (error);
}
struct tte *
tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va, u_long sz, u_long data)
{
struct tte *bucket;
struct tte *rtp;
struct tte *tp;
vm_offset_t ova;
int b0;
int i;
if (DCACHE_COLOR(VM_PAGE_TO_PHYS(m)) != DCACHE_COLOR(va)) {
CTR5(KTR_SPARE2,
"tsb_tte_enter: off colour va=%#lx pa=%#lx o=%p ot=%d pi=%#lx",
va, VM_PAGE_TO_PHYS(m), m->object,
m->object ? m->object->type : -1,
m->pindex);
if (pm == kernel_pmap)
PMAP_STATS_INC(tsb_nenter_k_oc);
else
PMAP_STATS_INC(tsb_nenter_u_oc);
}
rw_assert(&tte_list_global_lock, RA_WLOCKED);
PMAP_LOCK_ASSERT(pm, MA_OWNED);
if (pm == kernel_pmap) {
PMAP_STATS_INC(tsb_nenter_k);
tp = tsb_kvtotte(va);
KASSERT((tp->tte_data & TD_V) == 0,
("tsb_tte_enter: replacing valid kernel mapping"));
goto enter;
}
PMAP_STATS_INC(tsb_nenter_u);
bucket = tsb_vtobucket(pm, sz, va);
tp = NULL;
rtp = NULL;
b0 = rd(tick) & (TSB_BUCKET_SIZE - 1);
i = b0;
do {
if ((bucket[i].tte_data & TD_V) == 0) {
tp = &bucket[i];
break;
}
if (tp == NULL) {
if ((bucket[i].tte_data & TD_REF) == 0)
tp = &bucket[i];
else if (rtp == NULL)
rtp = &bucket[i];
}
} while ((i = (i + 1) & (TSB_BUCKET_SIZE - 1)) != b0);
if (tp == NULL)
tp = rtp;
if ((tp->tte_data & TD_V) != 0) {
PMAP_STATS_INC(tsb_nrepl);
ova = TTE_GET_VA(tp);
pmap_remove_tte(pm, NULL, tp, ova);
tlb_page_demap(pm, ova);
}
enter:
if ((m->flags & PG_FICTITIOUS) == 0) {
data |= TD_CP;
if ((m->oflags & VPO_UNMANAGED) == 0) {
pm->pm_stats.resident_count++;
data |= TD_PV;
}
if (pmap_cache_enter(m, va) != 0)
data |= TD_CV;
TAILQ_INSERT_TAIL(&m->md.tte_list, tp, tte_link);
} else
data |= TD_FAKE | TD_E;
tp->tte_vpn = TV_VPN(va, sz);
tp->tte_data = data;
return (tp);
}
