Tegra: memctrl: clean MC INT status before exit to bootloader
This patch cleans the Memory controller's interrupt status
register, before exiting to the non-secure world during
cold boot. This is required as we observed that the MC's
arbitration bit is set before exiting the secure world.
Change-Id: Iacd01994d03b3b9cbd7b8a57fe7ab5b04e607a9f
Signed-off-by: Harvey Hsieh <hhsieh@nvidia.com>
diff --git a/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v1.c b/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v1.c
index 27ad563..92fa273 100644
--- a/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v1.c
+++ b/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v1.c
@@ -209,3 +209,16 @@
/* lock the aperture registers */
tegra_mc_write_32(MC_IRAM_REG_CTRL, MC_DISABLE_IRAM_CFG_WRITES);
}
+
+void tegra_memctrl_clear_pending_interrupts(void)
+{
+ uint32_t mcerr;
+
+ /* check if there are any pending interrupts */
+ mcerr = mmio_read_32(TEGRA_MC_BASE + MC_INTSTATUS);
+
+ if (mcerr != (uint32_t)0U) { /* should not see error here */
+ WARN("MC_INTSTATUS = 0x%x (should be zero)\n", mcerr);
+ mmio_write_32((TEGRA_MC_BASE + MC_INTSTATUS), mcerr);
+ }
+}