Tegra194: add redundancy checks for MMIO writes
MMIO writes should verify that the writes actually went through.
Read the value back after the write operation, perform assert
if the read back value is not same as the write value.
Change-Id: Id2ceb014116f3aa6a9e86505ca1ae9911470a679
Signed-off-by: Anthony Zhou <anzhou@nvidia.com>
diff --git a/plat/nvidia/tegra/include/drivers/memctrl_v2.h b/plat/nvidia/tegra/include/drivers/memctrl_v2.h
index e15762b..4239fea 100644
--- a/plat/nvidia/tegra/include/drivers/memctrl_v2.h
+++ b/plat/nvidia/tegra/include/drivers/memctrl_v2.h
@@ -84,6 +84,8 @@
.override_enable = OVERRIDE_ ## access \
}
+#include <assert.h>
+
typedef struct mc_regs {
uint32_t reg;
uint32_t val;
@@ -153,6 +155,7 @@
static inline void tegra_mc_streamid_write_32(uint32_t off, uint32_t val)
{
mmio_write_32(TEGRA_MC_STREAMID_BASE + off, val);
+ assert(mmio_read_32(TEGRA_MC_STREAMID_BASE + off) == val);
}
#endif