From bd738228e5936f90c9ffac7e45cbda54abf02357 Mon Sep 17 00:00:00 2001
From: Clement Faure <clement.faure@nxp.com>
Date: Fri, 25 Aug 2023 15:52:09 +0200
Subject: [PATCH] drivers: caam: check OPTEE DDR location if the CAAM DMA is 32
 bits width

On i.MX platforms, the CAAM DMA width is limited to 32 bits. That
limitation requires OPTEE to be located in the 32 bits DDR address
space.

Signed-off-by: Clement Faure <clement.faure@nxp.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
---
 core/drivers/crypto/caam/caam_ctrl.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/drivers/crypto/caam/caam_ctrl.c b/core/drivers/crypto/caam/caam_ctrl.c
index b72508fca59..02aebdf01d7 100644
--- a/core/drivers/crypto/caam/caam_ctrl.c
+++ b/core/drivers/crypto/caam/caam_ctrl.c
@@ -4,6 +4,7 @@
  *
  * Brief   CAAM Global Controller.
  */
+#include <assert.h>
 #include <caam_acipher.h>
 #include <caam_cipher.h>
 #include <caam_common.h>
@@ -21,6 +22,14 @@
 #include <kernel/panic.h>
 #include <tee_api_types.h>
 
+/*
+ * If the CAAM DMA only supports 32 bits physical addresses, OPTEE must
+ * be located within the 32 bits address space.
+ */
+#ifndef CFG_CAAM_64BIT
+static_assert((CFG_TZDRAM_START + CFG_TZDRAM_SIZE) < UINT32_MAX);
+#endif
+
 /* Crypto driver initialization */
 static TEE_Result crypto_driver_init(void)
 {