feat(imx8mp): enable BL32 fdt overlay support on imx8mp
Allow OP-TEE to generate a device-tree overlay binary
that will be applied by u-boot on the regular dtb.
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: Idfd268cdd8b7ba321f8e1b9b85c2bba7ffdeddf0
diff --git a/plat/imx/imx8m/imx8mp/imx8mp_bl31_setup.c b/plat/imx/imx8m/imx8mp/imx8mp_bl31_setup.c
index 13724fb..57e5c51 100644
--- a/plat/imx/imx8m/imx8mp/imx8mp_bl31_setup.c
+++ b/plat/imx/imx8m/imx8mp/imx8mp_bl31_setup.c
@@ -163,6 +163,11 @@
#ifdef SPD_trusty
bl32_image_ep_info.args.arg0 = BL32_SIZE;
bl32_image_ep_info.args.arg1 = BL32_BASE;
+#else
+ /* Make sure memory is clean */
+ mmio_write_32(BL32_FDT_OVERLAY_ADDR, 0);
+ bl33_image_ep_info.args.arg3 = BL32_FDT_OVERLAY_ADDR;
+ bl32_image_ep_info.args.arg3 = BL32_FDT_OVERLAY_ADDR;
#endif
#endif
diff --git a/plat/imx/imx8m/imx8mp/include/platform_def.h b/plat/imx/imx8m/imx8mp/include/platform_def.h
index 486c1ee..8807f5d 100644
--- a/plat/imx/imx8m/imx8mp/include/platform_def.h
+++ b/plat/imx/imx8m/imx8mp/include/platform_def.h
@@ -1,5 +1,5 @@
/*
- * Copyright 2020 NXP
+ * Copyright 2020-2022 NXP
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -62,6 +62,8 @@
#define PLAT_NS_IMAGE_OFFSET U(0x40200000)
#define PLAT_NS_IMAGE_SIZE U(0x00200000)
+#define BL32_FDT_OVERLAY_ADDR (PLAT_NS_IMAGE_OFFSET + 0x3000000)
+
/* GICv3 base address */
#define PLAT_GICD_BASE U(0x38800000)
#define PLAT_GICR_BASE U(0x38880000)