svn commit: r214617 - head/sys/powerpc/aim

[Alan Cox]

Author: alc
Date: Mon Nov  1 02:22:48 2010
New Revision: 214617
URL: http://svn.freebsd.org/changeset/base/214617

Log:
  Implement pmap_is_prefaultable().
  
  Reviewed by:	nwhitehorn

Modified:
  head/sys/powerpc/aim/mmu_oea.c
  head/sys/powerpc/aim/mmu_oea64.c

Modified: head/sys/powerpc/aim/mmu_oea.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea.c	Mon Nov  1 02:21:35 2010	(r214616)
+++ head/sys/powerpc/aim/mmu_oea.c	Mon Nov  1 02:22:48 2010	(r214617)
@@ -304,6 +304,7 @@ vm_paddr_t moea_extract(mmu_t, pmap_t, v
 vm_page_t moea_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t);
 void moea_init(mmu_t);
 boolean_t moea_is_modified(mmu_t, vm_page_t);
+boolean_t moea_is_prefaultable(mmu_t, pmap_t, vm_offset_t);
 boolean_t moea_is_referenced(mmu_t, vm_page_t);
 boolean_t moea_ts_referenced(mmu_t, vm_page_t);
 vm_offset_t moea_map(mmu_t, vm_offset_t *, vm_offset_t, vm_offset_t, int);
@@ -347,6 +348,7 @@ static mmu_method_t moea_methods[] = {
 	MMUMETHOD(mmu_extract_and_hold,	moea_extract_and_hold),
 	MMUMETHOD(mmu_init,		moea_init),
 	MMUMETHOD(mmu_is_modified,	moea_is_modified),
+	MMUMETHOD(mmu_is_prefaultable,	moea_is_prefaultable),
 	MMUMETHOD(mmu_is_referenced,	moea_is_referenced),
 	MMUMETHOD(mmu_ts_referenced,	moea_ts_referenced),
 	MMUMETHOD(mmu_map,     		moea_map),
@@ -1324,6 +1326,19 @@ moea_is_modified(mmu_t mmu, vm_page_t m)
 	return (moea_query_bit(m, PTE_CHG));
 }
 
+boolean_t
+moea_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va)
+{
+	struct pvo_entry *pvo;
+	boolean_t rv;
+
+	PMAP_LOCK(pmap);
+	pvo = moea_pvo_find_va(pmap, va & ~ADDR_POFF, NULL);
+	rv = pvo == NULL || (pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0;
+	PMAP_UNLOCK(pmap);
+	return (rv);
+}
+
 void
 moea_clear_reference(mmu_t mmu, vm_page_t m)
 {

Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c	Mon Nov  1 02:21:35 2010	(r214616)
+++ head/sys/powerpc/aim/mmu_oea64.c	Mon Nov  1 02:22:48 2010	(r214617)
@@ -400,6 +400,7 @@ vm_paddr_t moea64_extract(mmu_t, pmap_t,
 vm_page_t moea64_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t);
 void moea64_init(mmu_t);
 boolean_t moea64_is_modified(mmu_t, vm_page_t);
+boolean_t moea64_is_prefaultable(mmu_t, pmap_t, vm_offset_t);
 boolean_t moea64_is_referenced(mmu_t, vm_page_t);
 boolean_t moea64_ts_referenced(mmu_t, vm_page_t);
 vm_offset_t moea64_map(mmu_t, vm_offset_t *, vm_offset_t, vm_offset_t, int);
@@ -441,6 +442,7 @@ static mmu_method_t moea64_methods[] = {
 	MMUMETHOD(mmu_extract_and_hold,	moea64_extract_and_hold),
 	MMUMETHOD(mmu_init,		moea64_init),
 	MMUMETHOD(mmu_is_modified,	moea64_is_modified),
+	MMUMETHOD(mmu_is_prefaultable,	moea64_is_prefaultable),
 	MMUMETHOD(mmu_is_referenced,	moea64_is_referenced),
 	MMUMETHOD(mmu_ts_referenced,	moea64_ts_referenced),
 	MMUMETHOD(mmu_map,     		moea64_map),
@@ -1786,6 +1788,19 @@ moea64_is_modified(mmu_t mmu, vm_page_t 
 	return (moea64_query_bit(m, LPTE_CHG));
 }
 
+boolean_t
+moea64_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va)
+{
+	struct pvo_entry *pvo;
+	boolean_t rv;
+
+	PMAP_LOCK(pmap);
+	pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF);
+	rv = pvo == NULL || (pvo->pvo_pte.lpte.pte_hi & LPTE_VALID) == 0;
+	PMAP_UNLOCK(pmap);
+	return (rv);
+}
+
 void
 moea64_clear_reference(mmu_t mmu, vm_page_t m)
 {