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| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2022-02-16 07:51:36 +0100 |
|---|---|---|
| committer | Lean Sheng Tan <sheng.tan@9elements.com> | 2023-02-12 08:20:08 +0000 |
| commit | 4e00f155921a57af32bdaaaac6a9f1e5c184488b (patch) | |
| tree | 8a1e19ecff79ec6c73293cea2a9c693c81686490 | |
| parent | 21975e4a49ed8ee6d639808bae574b301fa3a389 (diff) | |
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>
| -rw-r--r-- | src/drivers/smmstore/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/drivers/smmstore/store.c | 24 | ||||
| -rw-r--r-- | src/include/smmstore.h | 2 |
3 files changed, 27 insertions, 1 deletions
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 * diff --git a/src/include/smmstore.h b/src/include/smmstore.h index dfd9336c4d..d3940abc3f 100644 --- a/src/include/smmstore.h +++ b/src/include/smmstore.h @@ -115,6 +115,8 @@ int smmstore_rawclear_region(uint32_t block_id); #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; |