From c123098035be8bae3859bbfbd06861f197c07631 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Tue, 31 Mar 2009 17:49:36 -0500 Subject: 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 continuation to the remaining mpc83xx boards that suffer from the same problem. Signed-off-by: Kim Phillips --- include/configs/sbc8349.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/configs/sbc8349.h') diff --git a/include/configs/sbc8349.h b/include/configs/sbc8349.h index db1d4ac030b..d0338f168b6 100644 --- a/include/configs/sbc8349.h +++ b/include/configs/sbc8349.h @@ -569,7 +569,8 @@ #define CONFIG_SYS_IBAT5U (CONFIG_SYS_IMMR | BATU_BL_256M | BATU_VS | BATU_VP) /* SDRAM @ 0xF0000000, stack in DCACHE 0xFDF00000 & FLASH @ 0xFE000000 */ -#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) -- cgit v1.2.3