Index: sys/powerpc/aim/mmu_oea.c
===================================================================
--- sys/powerpc/aim/mmu_oea.c
+++ sys/powerpc/aim/mmu_oea.c
@@ -384,6 +384,8 @@
 		switch (ma) {
 		case VM_MEMATTR_UNCACHEABLE:
 			return (PTE_I | PTE_G);
+		case VM_MEMATTR_CACHEABLE:
+			return (PTE_M);
 		case VM_MEMATTR_WRITE_COMBINING:
 		case VM_MEMATTR_WRITE_BACK:
 		case VM_MEMATTR_PREFETCHABLE:
Index: sys/powerpc/aim/mmu_oea64.c
===================================================================
--- sys/powerpc/aim/mmu_oea64.c
+++ sys/powerpc/aim/mmu_oea64.c
@@ -434,6 +434,8 @@
 		switch (ma) {
 		case VM_MEMATTR_UNCACHEABLE:
 			return (LPTE_I | LPTE_G);
+		case VM_MEMATTR_CACHEABLE:
+			return (LPTE_M);
 		case VM_MEMATTR_WRITE_COMBINING:
 		case VM_MEMATTR_WRITE_BACK:
 		case VM_MEMATTR_PREFETCHABLE:
Index: sys/powerpc/booke/pmap.c
===================================================================
--- sys/powerpc/booke/pmap.c
+++ sys/powerpc/booke/pmap.c
@@ -419,6 +419,8 @@
 			return (PTE_I);
 		case VM_MEMATTR_WRITE_THROUGH:
 			return (PTE_W | PTE_M);
+		case VM_MEMATTR_CACHEABLE:
+			return _TLB_ENTRY_MEM;
 		}
 	}
 
Index: sys/powerpc/powerpc/nexus.c
===================================================================
--- sys/powerpc/powerpc/nexus.c
+++ sys/powerpc/powerpc/nexus.c
@@ -189,15 +189,19 @@
 {
 
 	if (type == SYS_RES_MEMORY) {
-		vm_offset_t start;
+		vm_paddr_t start;
 		void *p;
+		vm_memattr_t ma;
 
-		start = (vm_offset_t) rman_get_start(r);
+		start = (vm_paddr_t) rman_get_start(r);
 		if (bootverbose)
-			printf("nexus mapdev: start %zx, len %ld\n", start,
-			    rman_get_size(r));
+			printf("nexus mapdev: start %jx, len %ld\n",
+			    (uintmax_t)start, rman_get_size(r));
 
-		p = pmap_mapdev(start, (vm_size_t) rman_get_size(r));
+		ma = VM_MEMATTR_DEFAULT;
+		if (rman_get_flags(r) & RF_CACHEABLE)
+			ma = VM_MEMATTR_CACHEABLE;
+		p = pmap_mapdev_attr(start, (vm_size_t) rman_get_size(r), ma);
 		if (p == NULL)
 			return (ENOMEM);
 		rman_set_virtual(r, p);
Index: sys/sys/rman.h
===================================================================
--- sys/sys/rman.h
+++ sys/sys/rman.h
@@ -47,6 +47,7 @@
 #define	RF_FIRSTSHARE	0x0020	/* first in sharing list */
 #define	RF_PREFETCHABLE	0x0040	/* resource is prefetchable */
 #define	RF_OPTIONAL	0x0080	/* for bus_alloc_resources() */
+#define	RF_CACHEABLE	0x0100	/* memory resource is cacheable */
 
 #define	RF_ALIGNMENT_SHIFT	10 /* alignment size bit starts bit 10 */
 #define	RF_ALIGNMENT_MASK	(0x003F << RF_ALIGNMENT_SHIFT)