struct tte *
tsb_tte_lookup(pmap_t pm, vm_offset_t va)
{
struct tte *bucket;
struct tte *tp;
u_long sz;
u_int i;
if (pm == kernel_pmap) {
PMAP_STATS_INC(tsb_nlookup_k);
tp = tsb_kvtotte(va);
if (tte_match(tp, va))
return (tp);
} else {
PMAP_LOCK_ASSERT(pm, MA_OWNED);
PMAP_STATS_INC(tsb_nlookup_u);
for (sz = TS_MIN; sz <= TS_MAX; sz++) {
bucket = tsb_vtobucket(pm, sz, va);
for (i = 0; i < TSB_BUCKET_SIZE; i++) {
tp = &bucket[i];
if (tte_match(tp, va))
return (tp);
}
}
}
return (NULL);
}
void
tlb_page_demap(struct pmap *pm, vm_offset_t va)
{
u_long flags;
void *cookie;
register_t s;
PMAP_STATS_INC(tlb_npage_demap);
cookie = ipi_tlb_page_demap(pm, va);
if (pm->pm_active & PCPU_GET(cpumask)) {
KASSERT(pm->pm_context[curcpu] != -1,
("tlb_page_demap: inactive pmap?"));
if (pm == kernel_pmap)
flags = TLB_DEMAP_NUCLEUS | TLB_DEMAP_PAGE;
else
flags = TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE;
s = intr_disable();
stxa(TLB_DEMAP_VA(va) | flags, ASI_DMMU_DEMAP, 0);
stxa(TLB_DEMAP_VA(va) | flags, ASI_IMMU_DEMAP, 0);
flush(KERNBASE);
intr_restore(s);
}
ipi_wait(cookie);
}
void
tlb_context_demap(struct pmap *pm)
{
void *cookie;
register_t s;
/*
* It is important that we are not interrupted or preempted while
* doing the IPIs. The interrupted CPU may hold locks, and since
* it will wait for the CPU that sent the IPI, this can lead
* to a deadlock when an interrupt comes in on that CPU and it's
* handler tries to grab one of that locks. This will only happen for
* spin locks, but these IPI types are delivered even if normal
* interrupts are disabled, so the lock critical section will not
* protect the target processor from entering the IPI handler with
* the lock held.
*/
PMAP_STATS_INC(tlb_ncontext_demap);
cookie = ipi_tlb_context_demap(pm);
if (pm->pm_active & PCPU_GET(cpumask)) {
KASSERT(pm->pm_context[curcpu] != -1,
("tlb_context_demap: inactive pmap?"));
s = intr_disable();
stxa(TLB_DEMAP_PRIMARY | TLB_DEMAP_CONTEXT, ASI_DMMU_DEMAP, 0);
stxa(TLB_DEMAP_PRIMARY | TLB_DEMAP_CONTEXT, ASI_IMMU_DEMAP, 0);
flush(KERNBASE);
intr_restore(s);
}
ipi_wait(cookie);
}
/*
* Traverse the tsb of a pmap, calling the callback function for any tte entry
* that has a virtual address between start and end. If this function returns 0,
* tsb_foreach() terminates.
* This is used by pmap_remove(), pmap_protect(), and pmap_copy() in the case
* that the number of pages in the range given to them reaches the
* dimensions of the tsb size as an optimization.
*/
void
tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
tsb_callback_t *callback)
{
vm_offset_t va;
struct tte *tp;
struct tte *tsbp;
uintptr_t i;
uintptr_t n;
PMAP_STATS_INC(tsb_nforeach);
if (pm1 == kernel_pmap) {
tsbp = tsb_kernel;
n = tsb_kernel_size / sizeof(struct tte);
} else {
tsbp = pm1->pm_tsb;
n = TSB_SIZE;
}
for (i = 0; i < n; i++) {
tp = &tsbp[i];
if ((tp->tte_data & TD_V) != 0) {
va = TTE_GET_VA(tp);
if (va >= start && va < end) {
if (!callback(pm1, pm2, tp, va))
break;
}
}
}
}
void
tlb_range_demap(struct pmap *pm, vm_offset_t start, vm_offset_t end)
{
vm_offset_t va;
void *cookie;
u_long flags;
register_t s;
PMAP_STATS_INC(tlb_nrange_demap);
cookie = ipi_tlb_range_demap(pm, start, end);
s = intr_disable();
if (CPU_ISSET(PCPU_GET(cpuid), &pm->pm_active)) {
KASSERT(pm->pm_context[curcpu] != -1,
("tlb_range_demap: inactive pmap?"));
if (pm == kernel_pmap)
flags = TLB_DEMAP_NUCLEUS | TLB_DEMAP_PAGE;
else
flags = TLB_DEMAP_PRIMARY | TLB_DEMAP_PAGE;
for (va = start; va < end; va += PAGE_SIZE) {
stxa(TLB_DEMAP_VA(va) | flags, ASI_DMMU_DEMAP, 0);
stxa(TLB_DEMAP_VA(va) | flags, ASI_IMMU_DEMAP, 0);
flush(KERNBASE);
}
}
intr_restore(s);
ipi_wait(cookie);
}
void
uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
{
vm_page_t m;
PMAP_STATS_INC(uma_nsmall_free);
m = PHYS_TO_VM_PAGE(TLB_DIRECT_TO_PHYS((vm_offset_t)mem));
m->wire_count--;
vm_page_free(m);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
}
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);
}
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);
}
