imx8: support parsing i.MX8 Container file

Add parsing i.MX8 Container file support, this is to let
SPL could load images in a container file to destination address.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 120 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/imx8/parse-container.c b/arch/arm/mach-imx/imx8/parse-container.c
new file mode 100644
index 0000000000..32f78bdddf
--- /dev/null
+++ b/arch/arm/mach-imx/imx8/parse-container.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018-2019 NXP
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <spl.h>
+#include <asm/arch/image.h>
+
+static struct boot_img_t *read_auth_image(struct spl_image_info *spl_image,
+					  struct spl_load_info *info,
+					  struct container_hdr *container,
+					  int image_index,
+					  u32 container_sector)
+{
+	struct boot_img_t *images;
+	ulong sector;
+	u32 sectors;
+
+	if (image_index > container->num_images) {
+		debug("Invalid image number\n");
+		return NULL;
+	}
+
+	images = (struct boot_img_t *)((u8 *)container +
+				       sizeof(struct container_hdr));
+
+	if (images[image_index].offset % info->bl_len) {
+		printf("%s: image%d offset not aligned to %u\n",
+		       __func__, image_index, info->bl_len);
+		return NULL;
+	}
+
+	sectors = roundup(images[image_index].size, info->bl_len) /
+		info->bl_len;
+	sector = images[image_index].offset / info->bl_len +
+		container_sector;
+
+	debug("%s: container: %p sector: %lu sectors: %u\n", __func__,
+	      container, sector, sectors);
+	if (info->read(info, sector, sectors,
+		       (void *)images[image_index].entry) != sectors) {
+		printf("%s wrong\n", __func__);
+		return NULL;
+	}
+
+	return &images[image_index];
+}
+
+static int read_auth_container(struct spl_image_info *spl_image,
+			       struct spl_load_info *info, ulong sector)
+{
+	struct container_hdr *container = NULL;
+	u16 length;
+	u32 sectors;
+	int i, size;
+
+	size = roundup(CONTAINER_HDR_ALIGNMENT, info->bl_len);
+	sectors = size / info->bl_len;
+
+	/*
+	 * It will not override the ATF code, so safe to use it here,
+	 * no need malloc
+	 */
+	container = (struct container_hdr *)spl_get_load_buffer(-size, size);
+
+	debug("%s: container: %p sector: %lu sectors: %u\n", __func__,
+	      container, sector, sectors);
+	if (info->read(info, sector, sectors, container) != sectors)
+		return -EIO;
+
+	if (container->tag != 0x87 && container->version != 0x0) {
+		printf("Wrong container header");
+		return -ENOENT;
+	}
+
+	if (!container->num_images) {
+		printf("Wrong container, no image found");
+		return -ENOENT;
+	}
+
+	length = container->length_lsb + (container->length_msb << 8);
+	debug("Container length %u\n", length);
+
+	if (length > CONTAINER_HDR_ALIGNMENT) {
+		size = roundup(length, info->bl_len);
+		sectors = size / info->bl_len;
+
+		container = (struct container_hdr *)spl_get_load_buffer(-size, size);
+
+		debug("%s: container: %p sector: %lu sectors: %u\n",
+		      __func__, container, sector, sectors);
+		if (info->read(info, sector, sectors, container) !=
+		    sectors)
+			return -EIO;
+	}
+
+	for (i = 0; i < container->num_images; i++) {
+		struct boot_img_t *image = read_auth_image(spl_image, info,
+							   container, i,
+							   sector);
+
+		if (!image)
+			return -EINVAL;
+
+		if (i == 0) {
+			spl_image->load_addr = image->dst;
+			spl_image->entry_point = image->entry;
+		}
+	}
+
+	return 0;
+}
+
+int spl_load_imx_container(struct spl_image_info *spl_image,
+			   struct spl_load_info *info, ulong sector)
+{
+	return read_auth_container(spl_image, info, sector);
+}