imx: imx_csu: Add a simple CSU layer
- Add a header to define imx_csu_init().
- Defines the Central Security Unit's Config Security Level
permission bits.
- Define CSU_CSL_OPEN_ACCESS permission bitmask
- Run a loop to setup peripheral CSU permissions
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
diff --git a/plat/imx/common/imx_csu.c b/plat/imx/common/imx_csu.c
new file mode 100644
index 0000000..7c6a63e
--- /dev/null
+++ b/plat/imx/common/imx_csu.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <mmio.h>
+#include <imx_csu.h>
+#include <imx_regs.h>
+
+void imx_csu_init(void)
+{
+ int i;
+ uintptr_t *csl_reg = (uintptr_t *)CSU_BASE;
+
+ for (i = 0; i < MXC_MAX_CSU_REGS; i++, csl_reg++)
+ mmio_write_32((uintptr_t)csl_reg, CSU_CSL_OPEN_ACCESS);
+}