diff options
Diffstat (limited to 'sys/ia64')
| -rw-r--r-- | sys/ia64/ia64/pmap.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/sys/ia64/ia64/pmap.c b/sys/ia64/ia64/pmap.c index 602090a..90a9615 100644 --- a/sys/ia64/ia64/pmap.c +++ b/sys/ia64/ia64/pmap.c @@ -1946,34 +1946,33 @@ pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object, } /* - * Routine: pmap_change_wiring - * Function: Change the wiring attribute for a map/virtual-address - * pair. - * In/out conditions: - * The mapping must already exist in the pmap. + * Clear the wired attribute from the mappings for the specified range of + * addresses in the given pmap. Every valid mapping within that range + * must have the wired attribute set. In contrast, invalid mappings + * cannot have the wired attribute set, so they are ignored. + * + * The wired attribute of the page table entry is not a hardware feature, + * so there is no need to invalidate any TLB entries. */ void -pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired) +pmap_unwire(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) { pmap_t oldpmap; struct ia64_lpte *pte; - CTR4(KTR_PMAP, "%s(pm=%p, va=%#lx, wired=%u)", __func__, pmap, va, - wired); + CTR4(KTR_PMAP, "%s(%p, %#x, %#x)", __func__, pmap, sva, eva); PMAP_LOCK(pmap); oldpmap = pmap_switch(pmap); - - pte = pmap_find_vhpt(va); - KASSERT(pte != NULL, ("pte")); - if (wired && !pmap_wired(pte)) { - pmap->pm_stats.wired_count++; - pmap_set_wired(pte); - } else if (!wired && pmap_wired(pte)) { + for (; sva < eva; sva += PAGE_SIZE) { + pte = pmap_find_vhpt(sva); + if (pte == NULL) + continue; + if (!pmap_wired(pte)) + panic("pmap_unwire: pte %p isn't wired", pte); pmap->pm_stats.wired_count--; pmap_clear_wired(pte); } - pmap_switch(oldpmap); PMAP_UNLOCK(pmap); } |
