Allow callers of OF_decode_addr to get the size of the found mapping. This

will allow for code that uses the old fdt_get_range and fdt_regsize
functions to find a range, map it, access, then unmap to replace this, up
to and including the map, with a call to OF_decode_addr.

As this function should only be used in the early boot code the unmap is
mostly do document we no longer need the mapping as it's a no-op, at least
on arm.

Reviewed by:	jhibbits
Sponsored by:	ABT Systems Ltd
Differential Revision:	https://reviews.freebsd.org/D5258

1 files changed, 5 insertions, 1 deletions

diff --git a/sys/mips/mips/ofw_machdep.c b/sys/mips/mips/ofw_machdep.c
index 82e2959..26bc260 100644
--- a/sys/mips/mips/ofw_machdep.c
+++ b/sys/mips/mips/ofw_machdep.c
@@ -38,7 +38,7 @@ __FBSDID("$FreeBSD$");
 
 int
 OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
-    bus_space_handle_t *handle)
+    bus_space_handle_t *handle, bus_size_t *sz)
 {
 	bus_addr_t addr;
 	bus_size_t size;
@@ -66,5 +66,9 @@ OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
 	*tag = fdtbus_bs_tag;
 	flags = 0;
 #endif
+
+	if (sz != NULL)
+		*sz = size;
+
 	return (bus_space_map(*tag, addr, size, flags, handle));
 }