Revert "soc/intel/systemagent.c: Fix memory type reporting"
This reverts commit 9c2f3cc9d9b3b3b7cfe1e62a70ea3061ca6c15ac.
This broke the smihandler for no clear reason on some platforms.
Change-Id: I72da99c019241b627ce8b543937364a53a5fe97b
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68879
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
diff --git a/src/soc/intel/common/block/systemagent/systemagent.c b/src/soc/intel/common/block/systemagent/systemagent.c
index ad60159..e74c118 100644
--- a/src/soc/intel/common/block/systemagent/systemagent.c
+++ b/src/soc/intel/common/block/systemagent/systemagent.c
@@ -201,8 +201,11 @@
sa_get_mem_map(dev, &sa_map_values[0]);
- /* top_of_ram -> TOLUD */
- reserved_ram_from_to(dev, index++, top_of_ram, sa_map_values[SA_TOLUD_REG]);
+ /*
+ * top_of_ram -> TOLUD: This contains TSEG which needs to be uncacheable
+ * for proper operation of the smihandler.
+ */
+ mmio_from_to(dev, index++, top_of_ram, sa_map_values[SA_TOLUD_REG]);
/* 4GiB -> TOUUD */
upper_ram_end(dev, index++, sa_map_values[SA_TOUUD_REG]);