Tegra186: mce: enable LATIC for chip verification
This patch adds a new interface to allow for making an ARI call that
will enable LATIC for the chip verification software harness.
LATIC allows some MINI ISMs to be read in the CCPLEX. The ISMs are
used for various measurements relevant ot particular locations in
Silicon. They are small counters which can be polled to determine
how fast a particular location in the Silicon is.
Original change by Guy Sotomayor <gsotomayor@nvidia.com>
Change-Id: Ifb49b8863a009d4cdd5d1ba38a23b5374500a4b3
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t186/drivers/include/mce.h b/plat/nvidia/tegra/soc/t186/drivers/include/mce.h
index 7078b8b..825f81f 100644
--- a/plat/nvidia/tegra/soc/t186/drivers/include/mce.h
+++ b/plat/nvidia/tegra/soc/t186/drivers/include/mce.h
@@ -94,6 +94,7 @@
MCE_CMD_ENUM_WRITE_MCA,
MCE_CMD_ROC_FLUSH_CACHE,
MCE_CMD_ROC_CLEAN_CACHE,
+ MCE_CMD_ENABLE_LATIC,
MCE_CMD_IS_CCX_ALLOWED = 0xFE,
MCE_CMD_MAX = 0xFF,
} mce_cmd_t;
diff --git a/plat/nvidia/tegra/soc/t186/drivers/mce/mce.c b/plat/nvidia/tegra/soc/t186/drivers/mce/mce.c
index 745b6f4..d105e36 100644
--- a/plat/nvidia/tegra/soc/t186/drivers/mce/mce.c
+++ b/plat/nvidia/tegra/soc/t186/drivers/mce/mce.c
@@ -356,6 +356,24 @@
break;
+#if ENABLE_CHIP_VERIFICATION_HARNESS
+ case MCE_CMD_ENABLE_LATIC:
+ /*
+ * This call is not for production use. The constant value,
+ * 0xFFFF0000, is specific to allowing for enabling LATIC on
+ * pre-production parts for the chip verification harness.
+ *
+ * Enabling LATIC allows S/W to read the MINI ISPs in the
+ * CCPLEX. The ISMs are used for various measurements relevant
+ * to particular locations in the Silicon. They are small
+ * counters which can be polled to determine how fast a
+ * particular location in the Silicon is.
+ */
+ ops->enter_ccplex_state(mce_get_curr_cpu_ari_base(),
+ 0xFFFF0000);
+
+ break;
+#endif
default:
ERROR("unknown MCE command (%d)\n", cmd);
return EINVAL;
diff --git a/plat/nvidia/tegra/soc/t186/plat_sip_calls.c b/plat/nvidia/tegra/soc/t186/plat_sip_calls.c
index fabab01..c7a2c41 100644
--- a/plat/nvidia/tegra/soc/t186/plat_sip_calls.c
+++ b/plat/nvidia/tegra/soc/t186/plat_sip_calls.c
@@ -64,6 +64,7 @@
#define TEGRA_SIP_MCE_CMD_ENUM_WRITE_MCA 0x82FFFF0D
#define TEGRA_SIP_MCE_CMD_ROC_FLUSH_CACHE 0x82FFFF0E
#define TEGRA_SIP_MCE_CMD_ROC_CLEAN_CACHE 0x82FFFF0F
+#define TEGRA_SIP_MCE_CMD_ENABLE_LATIC 0x82FFFF10
/*******************************************************************************
* This function is responsible for handling all T186 SiP calls
@@ -100,6 +101,7 @@
case TEGRA_SIP_MCE_CMD_ENUM_WRITE_MCA:
case TEGRA_SIP_MCE_CMD_ROC_FLUSH_CACHE:
case TEGRA_SIP_MCE_CMD_ROC_CLEAN_CACHE:
+ case TEGRA_SIP_MCE_CMD_ENABLE_LATIC:
/* clean up the high bits */
smc_fid &= MCE_CMD_MASK;
diff --git a/plat/nvidia/tegra/soc/t186/platform_t186.mk b/plat/nvidia/tegra/soc/t186/platform_t186.mk
index 0387a0a..4a4d9bb 100644
--- a/plat/nvidia/tegra/soc/t186/platform_t186.mk
+++ b/plat/nvidia/tegra/soc/t186/platform_t186.mk
@@ -32,6 +32,9 @@
ENABLE_ROC_FOR_ORDERING_CLIENT_REQUESTS := 1
$(eval $(call add_define,ENABLE_ROC_FOR_ORDERING_CLIENT_REQUESTS))
+ENABLE_CHIP_VERIFICATION_HARNESS := 0
+$(eval $(call add_define,ENABLE_CHIP_VERIFICATION_HARNESS))
+
# platform settings
TZDRAM_BASE := 0x30000000
$(eval $(call add_define,TZDRAM_BASE))
