diff options
Diffstat (limited to 'sys/powerpc/booke/pmap.c')
| -rw-r--r-- | sys/powerpc/booke/pmap.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c index 13e637c..549eaaa 100644 --- a/sys/powerpc/booke/pmap.c +++ b/sys/powerpc/booke/pmap.c @@ -288,6 +288,7 @@ static vm_page_t mmu_booke_extract_and_hold(mmu_t, pmap_t, vm_offset_t, static void mmu_booke_init(mmu_t); static boolean_t mmu_booke_is_modified(mmu_t, vm_page_t); static boolean_t mmu_booke_is_prefaultable(mmu_t, pmap_t, vm_offset_t); +static boolean_t mmu_booke_is_referenced(mmu_t, vm_page_t); static boolean_t mmu_booke_ts_referenced(mmu_t, vm_page_t); static vm_offset_t mmu_booke_map(mmu_t, vm_offset_t *, vm_offset_t, vm_offset_t, int); @@ -342,6 +343,7 @@ static mmu_method_t mmu_booke_methods[] = { MMUMETHOD(mmu_init, mmu_booke_init), MMUMETHOD(mmu_is_modified, mmu_booke_is_modified), MMUMETHOD(mmu_is_prefaultable, mmu_booke_is_prefaultable), + MMUMETHOD(mmu_is_referenced, mmu_booke_is_referenced), MMUMETHOD(mmu_ts_referenced, mmu_booke_ts_referenced), MMUMETHOD(mmu_map, mmu_booke_map), MMUMETHOD(mmu_mincore, mmu_booke_mincore), @@ -2181,6 +2183,33 @@ mmu_booke_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t addr) } /* + * Return whether or not the specified physical page was referenced + * in any physical maps. + */ +static boolean_t +mmu_booke_is_referenced(mmu_t mmu, vm_page_t m) +{ + pte_t *pte; + pv_entry_t pv; + boolean_t rv; + + mtx_assert(&vm_page_queue_mtx, MA_OWNED); + rv = FALSE; + if ((m->flags & (PG_FICTITIOUS | PG_UNMANAGED)) != 0) + return (rv); + TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { + PMAP_LOCK(pv->pv_pmap); + if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && + PTE_ISVALID(pte)) + rv = PTE_ISREFERENCED(pte) ? TRUE : FALSE; + PMAP_UNLOCK(pv->pv_pmap); + if (rv) + break; + } + return (rv); +} + +/* * Clear the modify bits on the specified physical page. */ static void |
