nxp: image loader for loading fip image

function load_img(), is dependent on:
- Recursively calling load_image() defined in common/bl_common.c
- for each image in the fip.
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I57ca4b666cd1b0b992b7c0fc2a4260b558c0e2a9

plat/nxp/common/img_loadr/img_loadr.mk

+#
+# Copyright 2020 NXP
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+IMG_LOADR_DRIVERS_PATH	:=  ${PLAT_COMMON_PATH}/img_loadr
+
+IMG_LOADR_SOURCES	:=  $(IMG_LOADR_DRIVERS_PATH)/load_img.c
+PLAT_INCLUDES		+= -I$(IMG_LOADR_DRIVERS_PATH)
+
+ifeq (${BL_COMM_IMG_LOADR_NEEDED},yes)
+BL_COMMON_SOURCES	+= ${IMG_LOADR_SOURCES}
+else
+ifeq (${BL2_IMG_LOADR_NEEDED},yes)
+BL2_SOURCES		+= ${IMG_LOADR_SOURCES}
+endif
+ifeq (${BL31_IMG_LOADR_NEEDED},yes)
+BL31_SOURCES		+= ${IMG_LOADR_SOURCES}
+endif
+endif

plat/nxp/common/img_loadr/load_img.c

+/*
+ * Copyright 2018-2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <assert.h>
+
+#include <common/bl_common.h>
+#include <common/desc_image_load.h>
+#include <lib/xlat_tables/xlat_tables_v2.h>
+
+#include "load_img.h"
+
+/******************************************************************************
+ * This function can be used to load DDR PHY/FUSE Images
+ *
+ * @param [in] image_id		 Image ID to be loaded
+ *
+ * @param [in,out]  image_base   Location at which the image should be loaded
+ *				 In case image is prepended by a CSF header,
+ *				 image_base is pointer to actual image after
+ *				 the header
+ *
+ * @param [in,out]  image_size   User should pass the maximum size of the image
+ *				 possible.(Buffer size starting from image_base)
+ *				 Actual size of the image loaded is returned
+ *				 back.
+ *****************************************************************************/
+int load_img(unsigned int image_id, uintptr_t *image_base,
+		      uint32_t *image_size)
+{
+	int err = 0;
+
+	image_desc_t img_info = {
+		.image_id = image_id,
+		SET_STATIC_PARAM_HEAD(image_info, PARAM_IMAGE_BINARY,
+				VERSION_2, image_info_t, 0),
+#ifdef CSF_HEADER_PREPENDED
+		.image_info.image_base = *image_base - CSF_HDR_SZ,
+		.image_info.image_max_size = *image_size + CSF_HDR_SZ,
+#else
+		.image_info.image_base = *image_base,
+		.image_info.image_max_size = *image_size,
+#endif
+	};
+
+	/* Create MMU entry for the CSF header */
+#if PLAT_XLAT_TABLES_DYNAMIC
+#ifdef CSF_HEADER_PREPENDED
+	mmap_add_dynamic_region(img_info.image_info.image_base,
+			img_info.image_info.image_base,
+			CSF_HDR_SZ,
+			MT_MEMORY | MT_RW | MT_SECURE);
+#endif
+#endif
+
+	VERBOSE("BL2: Loading IMG %d\n", image_id);
+	err = load_auth_image(image_id, &img_info.image_info);
+	if (err != 0) {
+		VERBOSE("Failed to load IMG %d\n", image_id);
+		return err;
+	}
+
+#ifdef CSF_HEADER_PREPENDED
+	*image_base = img_info.image_info.image_base + CSF_HDR_SZ;
+	*image_size = img_info.image_info.image_size - CSF_HDR_SZ;
+#if PLAT_XLAT_TABLES_DYNAMIC
+	mmap_remove_dynamic_region(img_info.image_info.image_base,
+				   CSF_HDR_SZ);
+#endif
+#else
+	*image_base = img_info.image_info.image_base;
+	*image_size = img_info.image_info.image_size;
+#endif
+
+	return err;
+}

plat/nxp/common/img_loadr/load_img.h

+/*
+ * Copyright 2018-2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef LOAD_IMAGE_H
+#define LOAD_IMAGE_H
+
+int load_img(unsigned int image_id, uintptr_t *image_base,
+		      uint32_t *image_size);
+
+#endif /* LOAD_IMAGE_H */