Tegra194: mce: enable strict checking
"Strict checking" is a mode where secure world can access
secure-only areas unlike legacy mode where secure world could
access non-secure spaces as well. Secure-only areas are defined
as the TZ-DRAM carveout and any GSC with the CPU_SECURE bit set.
This mode not only helps prevent issues with IO-Coherency but aids
with security as well.
This patch implements the programming sequence required to enable
strict checking mode for Tegra194 SoCs.
Change-Id: Ic2e594f79ec7c5bc1339b509e67c4c62efb9d0c0
Signed-off-by: Dilan Lee <dilee@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h b/plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h
index 1970a2d..3994b2d 100644
--- a/plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h
+++ b/plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h
@@ -36,6 +36,12 @@
******************************************************************************/
#define MCE_STAT_ID_SHIFT 16U
+/*******************************************************************************
+ * Security config macros
+ ******************************************************************************/
+#define STRICT_CHECKING_ENABLED_SET (1UL << 0)
+#define STRICT_CHECKING_LOCKED_SET (1UL << 1)
+
/* declarations for NVG handler functions */
uint64_t nvg_get_version(void);
int32_t nvg_enable_power_perf_mode(void);
@@ -54,12 +60,16 @@
int32_t nvg_roc_flush_cache(void);
int32_t nvg_roc_clean_cache_trbits(void);
int32_t nvg_enter_cstate(uint32_t state, uint32_t wake_time);
-
void nvg_set_request_data(uint64_t req, uint64_t data);
void nvg_set_request(uint64_t req);
uint64_t nvg_get_result(void);
uint64_t nvg_cache_clean(void);
uint64_t nvg_cache_clean_inval(void);
uint64_t nvg_cache_inval_all(void);
+int32_t nvg_roc_clean_cache_trbits(void);
+void nvg_enable_strict_checking_mode(void);
+
+/* MCE helper functions */
+void mce_enable_strict_checking(void);
#endif /* __MCE_PRIVATE_H__ */