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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 31 Jan 2013 20:53:31 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r246158 - head/sys/arm/arm
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Author: kib
Date: Thu Jan 31 20:53:31 2013
New Revision: 246158
URL: http://svnweb.freebsd.org/changeset/base/246158

Log:
  Use pmap_kextract() instead of inlining the page table walk.
  Remove the comment referencing non-existing code.
  
  Reviewed by:	cognet, ian (previous version)
  Tested by:	ian

Modified:
  head/sys/arm/arm/busdma_machdep.c

Modified: head/sys/arm/arm/busdma_machdep.c
==============================================================================
--- head/sys/arm/arm/busdma_machdep.c	Thu Jan 31 20:48:56 2013	(r246157)
+++ head/sys/arm/arm/busdma_machdep.c	Thu Jan 31 20:53:31 2013	(r246158)
@@ -849,9 +849,6 @@ bus_dmamap_load_buffer(bus_dma_tag_t dma
 	vm_offset_t vaddr = (vm_offset_t)buf;
 	int seg;
 	int error = 0;
-	pd_entry_t *pde;
-	pt_entry_t pte;
-	pt_entry_t *ptep;
 
 	lastaddr = *lastaddrp;
 	bmask = ~(dmat->boundary - 1);
@@ -868,34 +865,9 @@ bus_dmamap_load_buffer(bus_dma_tag_t dma
 	for (seg = *segp; buflen > 0 ; ) {
 		/*
 		 * Get the physical address for this segment.
-		 *
-		 * XXX Don't support checking for coherent mappings
-		 * XXX in user address space.
 		 */
 		if (__predict_true(pmap == pmap_kernel())) {
-			if (pmap_get_pde_pte(pmap, vaddr, &pde, &ptep) == FALSE)
-				return (EFAULT);
-
-			if (__predict_false(pmap_pde_section(pde))) {
-				if (*pde & L1_S_SUPERSEC)
-					curaddr = (*pde & L1_SUP_FRAME) |
-					    (vaddr & L1_SUP_OFFSET);
-				else
-					curaddr = (*pde & L1_S_FRAME) |
-					    (vaddr & L1_S_OFFSET);
-			} else {
-				pte = *ptep;
-				KASSERT((pte & L2_TYPE_MASK) != L2_TYPE_INV,
-				    ("INV type"));
-				if (__predict_false((pte & L2_TYPE_MASK)
-						    == L2_TYPE_L)) {
-					curaddr = (pte & L2_L_FRAME) |
-					    (vaddr & L2_L_OFFSET);
-				} else {
-					curaddr = (pte & L2_S_FRAME) |
-					    (vaddr & L2_S_OFFSET);
-				}
-			}
+			curaddr = pmap_kextract(vaddr);
 		} else {
 			curaddr = pmap_extract(pmap, vaddr);
 			map->flags &= ~DMAMAP_COHERENT;