diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/mips/mips/pmap.c | 64 |
1 files changed, 13 insertions, 51 deletions
diff --git a/sys/mips/mips/pmap.c b/sys/mips/mips/pmap.c index 80be862..3ecc9e8 100644 --- a/sys/mips/mips/pmap.c +++ b/sys/mips/mips/pmap.c @@ -179,7 +179,6 @@ static vm_page_t pmap_pv_reclaim(pmap_t locked_pmap); static void pmap_pvh_free(struct md_page *pvh, pmap_t pmap, vm_offset_t va); static pv_entry_t pmap_pvh_remove(struct md_page *pvh, pmap_t pmap, vm_offset_t va); -static __inline void pmap_changebit(vm_page_t m, int bit, boolean_t setem); static vm_page_t pmap_enter_quick_locked(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, vm_page_t mpte); static int pmap_remove_pte(struct pmap *pmap, pt_entry_t *ptq, vm_offset_t va, @@ -2664,8 +2663,6 @@ pmap_remove_pages(pmap_t pmap) /* * pmap_testbit tests bits in pte's - * note that the testbit/changebit routines are inline, - * and a lot of things compile-time evaluate. */ static boolean_t pmap_testbit(vm_page_t m, int bit) @@ -2692,51 +2689,6 @@ pmap_testbit(vm_page_t m, int bit) } /* - * this routine is used to clear dirty bits in ptes - */ -static __inline void -pmap_changebit(vm_page_t m, int bit, boolean_t setem) -{ - pv_entry_t pv; - pmap_t pmap; - pt_entry_t *pte; - - if (m->oflags & VPO_UNMANAGED) - return; - - rw_assert(&pvh_global_lock, RA_WLOCKED); - /* - * Loop over all current mappings setting/clearing as appropos If - * setting RO do we need to clear the VAC? - */ - TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) { - pmap = PV_PMAP(pv); - PMAP_LOCK(pmap); - pte = pmap_pte(pmap, pv->pv_va); - if (setem) { - *pte |= bit; - pmap_update_page(pmap, pv->pv_va, *pte); - } else { - pt_entry_t pbits = *pte; - - if (pbits & bit) { - if (bit == PTE_D) { - if (pbits & PTE_D) - vm_page_dirty(m); - *pte = (pbits & ~PTE_D) | PTE_RO; - } else { - *pte = pbits & ~bit; - } - pmap_update_page(pmap, pv->pv_va, *pte); - } - } - PMAP_UNLOCK(pmap); - } - if (!setem && bit == PTE_D) - vm_page_aflag_clear(m, PGA_WRITEABLE); -} - -/* * pmap_page_wired_mappings: * * Return the number of managed mappings to the given physical page @@ -2896,6 +2848,9 @@ pmap_is_prefaultable(pmap_t pmap, vm_offset_t addr) void pmap_clear_modify(vm_page_t m) { + pmap_t pmap; + pt_entry_t *pte; + pv_entry_t pv; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("pmap_clear_modify: page %p is not managed", m)); @@ -2911,10 +2866,17 @@ pmap_clear_modify(vm_page_t m) if ((m->aflags & PGA_WRITEABLE) == 0) return; rw_wlock(&pvh_global_lock); - if (m->md.pv_flags & PV_TABLE_MOD) { - pmap_changebit(m, PTE_D, FALSE); - m->md.pv_flags &= ~PV_TABLE_MOD; + TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) { + pmap = PV_PMAP(pv); + PMAP_LOCK(pmap); + pte = pmap_pte(pmap, pv->pv_va); + if (pte_test(pte, PTE_D)) { + pte_clear(pte, PTE_D); + pmap_update_page(pmap, pv->pv_va, *pte); + } + PMAP_UNLOCK(pmap); } + m->md.pv_flags &= ~PV_TABLE_MOD; rw_wunlock(&pvh_global_lock); } |
