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head/sys/sparc64/sparc64/pmap.c
| Show First 20 Lines • Show All 840 Lines • ▼ Show 20 Lines | |||||
| * pmap and virtual address pair if that mapping permits the given | * pmap and virtual address pair if that mapping permits the given | ||||
| * protection. | * protection. | ||||
| */ | */ | ||||
| vm_page_t | vm_page_t | ||||
| pmap_extract_and_hold(pmap_t pm, vm_offset_t va, vm_prot_t prot) | pmap_extract_and_hold(pmap_t pm, vm_offset_t va, vm_prot_t prot) | ||||
| { | { | ||||
| struct tte *tp; | struct tte *tp; | ||||
| vm_page_t m; | vm_page_t m; | ||||
| vm_paddr_t pa; | |||||
| m = NULL; | m = NULL; | ||||
| pa = 0; | |||||
| PMAP_LOCK(pm); | PMAP_LOCK(pm); | ||||
| retry: | |||||
| if (pm == kernel_pmap) { | if (pm == kernel_pmap) { | ||||
| if (va >= VM_MIN_DIRECT_ADDRESS) { | if (va >= VM_MIN_DIRECT_ADDRESS) { | ||||
| tp = NULL; | tp = NULL; | ||||
| m = PHYS_TO_VM_PAGE(TLB_DIRECT_TO_PHYS(va)); | m = PHYS_TO_VM_PAGE(TLB_DIRECT_TO_PHYS(va)); | ||||
| (void)vm_page_pa_tryrelock(pm, TLB_DIRECT_TO_PHYS(va), | if (!vm_page_wire_mapped(m)) | ||||
| &pa); | m = NULL; | ||||
| vm_page_wire(m); | |||||
| } else { | } else { | ||||
| tp = tsb_kvtotte(va); | tp = tsb_kvtotte(va); | ||||
| if ((tp->tte_data & TD_V) == 0) | if ((tp->tte_data & TD_V) == 0) | ||||
| tp = NULL; | tp = NULL; | ||||
| } | } | ||||
| } else | } else | ||||
| tp = tsb_tte_lookup(pm, va); | tp = tsb_tte_lookup(pm, va); | ||||
| if (tp != NULL && ((tp->tte_data & TD_SW) || | if (tp != NULL && ((tp->tte_data & TD_SW) || | ||||
| (prot & VM_PROT_WRITE) == 0)) { | (prot & VM_PROT_WRITE) == 0)) { | ||||
| if (vm_page_pa_tryrelock(pm, TTE_GET_PA(tp), &pa)) | |||||
| goto retry; | |||||
| m = PHYS_TO_VM_PAGE(TTE_GET_PA(tp)); | m = PHYS_TO_VM_PAGE(TTE_GET_PA(tp)); | ||||
| vm_page_wire(m); | if (!vm_page_wire_mapped(m)) | ||||
| m = NULL; | |||||
| } | } | ||||
| PA_UNLOCK_COND(pa); | |||||
| PMAP_UNLOCK(pm); | PMAP_UNLOCK(pm); | ||||
| return (m); | return (m); | ||||
| } | } | ||||
| /* | /* | ||||
| * Extract the physical page address associated with the given kernel virtual | * Extract the physical page address associated with the given kernel virtual | ||||
| * address. | * address. | ||||
| */ | */ | ||||
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