pc80/tpm: allow for cache-as-ram migration
As the TPM driver can be accessed in romstage after
cache-as-ram is torn down use the cache-as-ram migration
API to dynamically determine the global variable address.
Change-Id: I149d7c130bc3677ed52282095670c07a76c34439
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/3233
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/drivers/pc80/tpm.c b/src/drivers/pc80/tpm.c
index c7b5081..9a4fc09 100644
--- a/src/drivers/pc80/tpm.c
+++ b/src/drivers/pc80/tpm.c
@@ -278,7 +278,7 @@
u16 vid, did;
int i;
- if (vendor_dev_id)
+ if (car_get_var(vendor_dev_id))
return 0; /* Already probed. */
didvid = tpm_read(0, TIS_REG_DID_VID);
@@ -287,7 +287,7 @@
return TPM_DRIVER_ERR;
}
- vendor_dev_id = didvid;
+ car_set_var(vendor_dev_id, didvid);
vid = didvid & 0xffff;
did = (didvid >> 16) & 0xffff;