[PATCH] ppc32: Fix static IO mapping for Freescale MPC52xx

The current iomapping used MBAR_SIZE for the size argument of
io_block_mapping, resulting in a call to setbat with a size argument of 64k
which is invalid.

This patch correct this and maps the whole 0xf0000000->0xffffffff range so
that devices on the local bus are also included in the BAT mapping.

Thanks to Bernhard Kuhn from Metrowerks for pointing this out.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/ppc/syslib/mpc52xx_setup.c b/arch/ppc/syslib/mpc52xx_setup.c
index bb2374585a7b..a4a4b02227df 100644
--- a/arch/ppc/syslib/mpc52xx_setup.c
+++ b/arch/ppc/syslib/mpc52xx_setup.c
@@ -84,9 +84,11 @@ mpc52xx_set_bat(void)
 void __init
 mpc52xx_map_io(void)
 {
-        /* Here we only map the MBAR */
+        /* Here we map the MBAR and the whole upper zone. MBAR is only
+           64k but we can't map only 64k with BATs. Map the whole
+           0xf0000000 range is ok and helps eventual lpb devices placed there */
         io_block_mapping(
-                MPC52xx_MBAR_VIRT, MPC52xx_MBAR, MPC52xx_MBAR_SIZE, _PAGE_IO);
+                MPC52xx_MBAR_VIRT, MPC52xx_MBAR, 0x10000000, _PAGE_IO);
 }