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authorScott Wood <scottwood@freescale.com>2009-03-31 17:49:36 -0500
committerKim Phillips <kim.phillips@freescale.com>2009-04-01 16:48:57 -0500
commitc123098035be8bae3859bbfbd06861f197c07631 (patch)
tree3a4c38940b7021d505df654c6b4d9c7880751e0c /include/configs/MVBLM7.h
parented9953d6903c9673135a96ae1644f61cb0eac5ce (diff)
mpc83xx: Set guarded bit on BAT that covers the end of the address space
The mpc8313erdb board currently sets DBAT6 to cover all of the final 256MiB of address space; however, not all of this space is covered by a device. In particular, flash sits at 0xfe000000-0xfe7fffff, and nothing is mapped at the far end of the address space. In zlib, there is a loop that references p[-1] if p is non-NULL. Under some circumstances, this leads to the CPU speculatively loading from 0xfffffff8 if p is NULL. This leads to a machine check. Signed-off-by: Scott Wood <scottwood@freescale.com> continuation to the remaining mpc83xx boards that suffer from the same problem. Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Diffstat (limited to 'include/configs/MVBLM7.h')
-rw-r--r--include/configs/MVBLM7.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/configs/MVBLM7.h b/include/configs/MVBLM7.h
index 4ecf8068ecf..b321825c953 100644
--- a/include/configs/MVBLM7.h
+++ b/include/configs/MVBLM7.h
@@ -360,7 +360,8 @@
#define CONFIG_SYS_IBAT5U (CONFIG_SYS_IMMR | BATU_BL_256M | BATU_VS | BATU_VP)
/* stack in DCACHE 0xFDF00000 & FLASH @ 0xFF800000 */
-#define CONFIG_SYS_IBAT6L (0xF0000000 | BATL_PP_10 | BATL_MEMCOHERENCE)
+#define CONFIG_SYS_IBAT6L (0xF0000000 | BATL_PP_10 | BATL_MEMCOHERENCE | \
+ BATL_GUARDEDSTORAGE)
#define CONFIG_SYS_IBAT6U (0xF0000000 | BATU_BL_256M | BATU_VS | BATU_VP)
#define CONFIG_SYS_IBAT7L 0
#define CONFIG_SYS_IBAT7U 0