svn commit: r261258 - head/sys/powerpc/aim

[Justin Hibbits]

Author: jhibbits
Date: Wed Jan 29 05:58:08 2014
New Revision: 261258
URL: http://svnweb.freebsd.org/changeset/base/261258

Log:
  Use a loop of dcbz, instead of calling bzero() to zero a page.  This matches
  what is done in mmu_oea64.c.
  
  MFC after:	1 month

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

Modified: head/sys/powerpc/aim/mmu_oea.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea.c	Wed Jan 29 05:00:04 2014	(r261257)
+++ head/sys/powerpc/aim/mmu_oea.c	Wed Jan 29 05:58:08 2014	(r261258)
@@ -1084,10 +1084,10 @@ moea_copy_pages(mmu_t mmu, vm_page_t *ma
 void
 moea_zero_page(mmu_t mmu, vm_page_t m)
 {
-	vm_offset_t pa = VM_PAGE_TO_PHYS(m);
-	void *va = (void *)pa;
+	vm_offset_t off, pa = VM_PAGE_TO_PHYS(m);
 
-	bzero(va, PAGE_SIZE);
+	for (off = 0; off < PAGE_SIZE; off += cacheline_size)
+		__asm __volatile("dcbz 0,%0" :: "r"(pa + off));
 }
 
 void
@@ -1102,10 +1102,8 @@ moea_zero_page_area(mmu_t mmu, vm_page_t
 void
 moea_zero_page_idle(mmu_t mmu, vm_page_t m)
 {
-	vm_offset_t pa = VM_PAGE_TO_PHYS(m);
-	void *va = (void *)pa;
 
-	bzero(va, PAGE_SIZE);
+	moea_zero_page(mmu, m);
 }
 
 /*