drivers/smmstore: Expose region device
Allow other drivers to use the SMMSTORE region device.
Change-Id: I6316b703829590bd6f41c3d4013b4a4660b9cbab
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62014
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
diff --git a/src/drivers/smmstore/store.c b/src/drivers/smmstore/store.c
index 96cb761..e0f0f57 100644
--- a/src/drivers/smmstore/store.c
+++ b/src/drivers/smmstore/store.c
@@ -88,6 +88,30 @@
return rdev_chain(rstore, rdev, 0, region_device_sz(rdev));
}
+ /* this function is non reentrant */
+int smmstore_lookup_region(struct region_device *rstore)
+{
+ static int done;
+ static int ret;
+ static struct region_device rdev;
+
+ if (!done) {
+
+ done = 1;
+
+ if (fmap_locate_area_as_rdev_rw(SMMSTORE_REGION, &rdev)) {
+ printk(BIOS_WARNING,
+ "smm store: Unable to find SMM store FMAP region '%s'\n",
+ SMMSTORE_REGION);
+ ret = -1;
+ } else {
+ ret = 0;
+ }
+ }
+
+ *rstore = rdev;
+ return ret;
+}
/*
* Read entire store into user provided buffer
*