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diff --git a/sys/arm64/arm64/nexus.c b/sys/arm64/arm64/nexus.c
--- a/sys/arm64/arm64/nexus.c
+++ b/sys/arm64/arm64/nexus.c
@@ -64,6 +64,7 @@
#ifdef FDT
#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include "ofw_bus_if.h"
#endif
@@ -92,6 +93,7 @@
#ifdef FDT
static device_probe_t nexus_fdt_probe;
static device_attach_t nexus_fdt_attach;
+static bus_activate_resource_t nexus_fdt_activate_resource;
#endif
#ifdef DEV_ACPI
static device_probe_t nexus_acpi_probe;
@@ -366,9 +368,10 @@
}
static int
-nexus_activate_resource(device_t bus, device_t child, int type, int rid,
- struct resource *r)
+nexus_activate_resource_flags(device_t bus, device_t child, int type, int rid,
+ struct resource *r, int flags)
{
+ struct resource_map_request args;
struct resource_map map;
int err;
@@ -382,7 +385,10 @@
case SYS_RES_IOPORT:
case SYS_RES_MEMORY:
if ((rman_get_flags(r) & RF_UNMAPPED) == 0) {
- err = nexus_map_resource(bus, child, type, r, NULL,
+ resource_init_map_request(&args);
+ if ((flags & BUS_SPACE_MAP_NONPOSTED) != 0)
+ args.memattr = VM_MEMATTR_DEVICE_NP;
+ err = nexus_map_resource(bus, child, type, r, &args,
&map);
if (err != 0) {
rman_deactivate_resource(r);
@@ -402,6 +408,13 @@
return (0);
}
+static int
+nexus_activate_resource(device_t dev, device_t child, int type, int rid,
+ struct resource *r)
+{
+ return (nexus_activate_resource_flags(dev, child, type, rid, r, 0));
+}
+
static struct resource_list *
nexus_get_reslist(device_t dev, device_t child)
{
@@ -497,6 +510,9 @@
DEVMETHOD(device_probe, nexus_fdt_probe),
DEVMETHOD(device_attach, nexus_fdt_attach),
+ /* Bus interface */
+ DEVMETHOD(bus_activate_resource, nexus_fdt_activate_resource),
+
/* OFW interface */
DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr),
@@ -529,6 +545,39 @@
return (nexus_attach(dev));
}
+static int
+nexus_fdt_activate_resource(device_t bus, device_t child, int type, int rid,
+ struct resource *r)
+{
+ phandle_t node, parent;
+ int flags;
+
+ flags = 0;
+ switch (type) {
+ case SYS_RES_MEMORY:
+ case SYS_RES_IOPORT:
+ /*
+ * If the fdt parent has the nonposted-mmio property we
+ * need to use non-posted IO to access the device. When
+ * we find this property set the BUS_SPACE_MAP_NONPOSTED
+ * flag to be passed to bus_space_map.
+ */
+ node = ofw_bus_get_node(child);
+ if (node != -1) {
+ parent = OF_parent(node);
+ if (parent != -1 &&
+ OF_hasprop(parent, "nonposted-mmio")) {
+ flags |= BUS_SPACE_MAP_NONPOSTED;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ return (nexus_activate_resource_flags(bus, child, type, rid, r, flags));
+}
+
static int
nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
pcell_t *intr)

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