diff options
author | Aaron Durbin <adurbin@chromium.org> | 2017-10-12 11:23:58 -0600 |
---|---|---|
committer | Aaron Durbin <adurbin@chromium.org> | 2017-10-16 16:56:15 +0000 |
commit | c714137d9519c12d2b951abf3c335fb1d6912029 (patch) | |
tree | 3139ed56326f5f3fa3735893de0fc37b3cd4b623 /src/soc/intel/common/block/include/intelblocks | |
parent | d45011c9c63afb6f4b25b8ae92d7b74cc873b15c (diff) |
soc/intel/common: sanity check ebda signature
It's possible for chipsets utilizing ebda to cache the cbmem_top()
value to be called prior to the object being entirely setup. As
such it's important to check the signature to ensure the object
has been initialized. Do that in a newly introduced function,
retrieve_ebda_object(), which will zero out the object if the
signature doesn't match.
Change-Id: I66b07c36f46ed9112bc39b44914c860ba68677ae
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/21995
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Diffstat (limited to 'src/soc/intel/common/block/include/intelblocks')
-rw-r--r-- | src/soc/intel/common/block/include/intelblocks/ebda.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/ebda.h b/src/soc/intel/common/block/include/intelblocks/ebda.h index 031cf1973d..16124df7e0 100644 --- a/src/soc/intel/common/block/include/intelblocks/ebda.h +++ b/src/soc/intel/common/block/include/intelblocks/ebda.h @@ -18,7 +18,7 @@ #include <soc/ebda.h> -#define EBDA_SIGNATURE 0xebda +#define EBDA_SIGNATURE 0xebdaebda /* * Mainboard Override function @@ -45,6 +45,10 @@ void fill_soc_memmap_ebda(struct ebda_config *cfg); */ void fill_ebda_area(void); +/* Fill the ebda object pointed to by cfg. Object will be zero filled + * if signature check fails. */ +void retrieve_ebda_object(struct ebda_config *cfg); + /* * EBDA structure * |