From 4e00f155921a57af32bdaaaac6a9f1e5c184488b Mon Sep 17 00:00:00 2001 From: Patrick Rudolph Date: Wed, 16 Feb 2022 07:51:36 +0100 Subject: drivers/smmstore: Expose region device Allow other drivers to use the SMMSTORE region device. Change-Id: I6316b703829590bd6f41c3d4013b4a4660b9cbab Signed-off-by: Patrick Rudolph Reviewed-on: https://review.coreboot.org/c/coreboot/+/62014 Tested-by: build bot (Jenkins) Reviewed-by: Lean Sheng Tan --- src/drivers/smmstore/Makefile.inc | 2 +- src/drivers/smmstore/store.c | 24 ++++++++++++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) (limited to 'src/drivers') diff --git a/src/drivers/smmstore/Makefile.inc b/src/drivers/smmstore/Makefile.inc index 6d9a9d6a2f..03f85c5130 100644 --- a/src/drivers/smmstore/Makefile.inc +++ b/src/drivers/smmstore/Makefile.inc @@ -1,4 +1,4 @@ -ramstage-$(CONFIG_SMMSTORE) += store.c +all-$(CONFIG_SMMSTORE) += store.c ifeq ($(CONFIG_SMMSTORE),y) $(call src-to-obj,ramstage,$(dir)/store.c) : $(obj)/fmap_config.h diff --git a/src/drivers/smmstore/store.c b/src/drivers/smmstore/store.c index 96cb761e40..e0f0f57097 100644 --- a/src/drivers/smmstore/store.c +++ b/src/drivers/smmstore/store.c @@ -88,6 +88,30 @@ static int lookup_store(struct region_device *rstore) 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 * -- cgit v1.2.3