Lean Sheng Tan has submitted this change. ( https://review.coreboot.org/c/coreboot/+/62014 )
Change subject: drivers/smmstore: Expose region device ......................................................................
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 --- M src/drivers/smmstore/Makefile.inc M src/drivers/smmstore/store.c M src/include/smmstore.h 3 files changed, 42 insertions(+), 1 deletion(-)
Approvals: build bot (Jenkins): Verified Lean Sheng Tan: Looks good to me, approved
diff --git a/src/drivers/smmstore/Makefile.inc b/src/drivers/smmstore/Makefile.inc index 6d9a9d6..03f85c5 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 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 * diff --git a/src/include/smmstore.h b/src/include/smmstore.h index dfd9336..d3940ab 100644 --- a/src/include/smmstore.h +++ b/src/include/smmstore.h @@ -115,6 +115,8 @@ #if ENV_RAMSTAGE int smmstore_get_info(struct smmstore_params_info *info); #endif +struct region_device; +int smmstore_lookup_region(struct region_device *rstore);
/* Advertise SMMSTORE v2 support */ struct lb_header;