Move i.MX8 container image loading support to common/spl

To facilitate testing loading i.MX8 container images, move the
parse-container code to common/spl.

Signed-off-by: Sean Anderson <seanga2@gmail.com>

3 files changed, 173 insertions, 0 deletions

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 4632359..ad574a6 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -330,6 +330,20 @@ config SPL_LEGACY_IMAGE_CRC_CHECK
 	  If disabled, Legacy images are booted if the image magic and size
 	  are correct, without further integrity checks.
 
+config SPL_LOAD_IMX_CONTAINER
+	bool "Enable SPL loading and booting of i.MX8 Containers"
+	depends on SPL
+	help
+	  Support booting U-Boot from an i.MX8 container image. If you are not
+	  using i.MX8, say 'n'.
+
+config IMX_CONTAINER_CFG
+	string "i.MX8 Container config file"
+	depends on SPL && SPL_LOAD_IMX_CONTAINER
+	help
+	  Specify the cfg file for generating the container image which will be
+	  loaded by SPL.
+
 config SPL_SYS_MALLOC_SIMPLE
 	bool "Only use malloc_simple functions in the SPL"
 	help
diff --git a/common/spl/Makefile b/common/spl/Makefile
index bad2bbf..4f8eb2e 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_$(SPL_TPL_)OPENSBI) += spl_opensbi.o
 obj-$(CONFIG_$(SPL_TPL_)USB_STORAGE) += spl_usb.o
 obj-$(CONFIG_$(SPL_TPL_)FS_FAT) += spl_fat.o
 obj-$(CONFIG_$(SPL_TPL_)FS_EXT4) += spl_ext.o
+obj-$(CONFIG_$(SPL_TPL_)LOAD_IMX_CONTAINER) += spl_imx_container.o
 obj-$(CONFIG_$(SPL_TPL_)SATA) += spl_sata.o
 obj-$(CONFIG_$(SPL_TPL_)NVME) += spl_nvme.o
 obj-$(CONFIG_$(SPL_TPL_)SEMIHOSTING) += spl_semihosting.o
diff --git a/common/spl/spl_imx_container.c b/common/spl/spl_imx_container.c
new file mode 100644
index 0000000..c29cb15
--- /dev/null
+++ b/common/spl/spl_imx_container.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018-2021 NXP
+ */
+
+#define LOG_CATEGORY LOGC_ARCH
+#include <common.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <imx_container.h>
+#include <log.h>
+#include <spl.h>
+#ifdef CONFIG_AHAB_BOOT
+#include <asm/mach-imx/ahab.h>
+#endif
+
+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].dst) != sectors) {
+		printf("%s wrong\n", __func__);
+		return NULL;
+	}
+
+#ifdef CONFIG_AHAB_BOOT
+	if (ahab_verify_cntr_image(&images[image_index], image_index))
+		return NULL;
+#endif
+
+	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, ret = 0;
+
+	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 = malloc(size);
+	if (!container)
+		return -ENOMEM;
+
+	debug("%s: container: %p sector: %lu sectors: %u\n", __func__,
+	      container, sector, sectors);
+	if (info->read(info, sector, sectors, container) != sectors) {
+		ret = -EIO;
+		goto end;
+	}
+
+	if (!valid_container_hdr(container)) {
+		log_err("Wrong container header\n");
+		ret = -ENOENT;
+		goto end;
+	}
+
+	if (!container->num_images) {
+		log_err("Wrong container, no image found\n");
+		ret = -ENOENT;
+		goto end;
+	}
+
+	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;
+
+		free(container);
+		container = malloc(size);
+		if (!container)
+			return -ENOMEM;
+
+		debug("%s: container: %p sector: %lu sectors: %u\n",
+		      __func__, container, sector, sectors);
+		if (info->read(info, sector, sectors, container) !=
+		    sectors) {
+			ret = -EIO;
+			goto end;
+		}
+	}
+
+#ifdef CONFIG_AHAB_BOOT
+	ret = ahab_auth_cntr_hdr(container, length);
+	if (ret)
+		goto end_auth;
+#endif
+
+	for (i = 0; i < container->num_images; i++) {
+		struct boot_img_t *image = read_auth_image(spl_image, info,
+							   container, i,
+							   sector);
+
+		if (!image) {
+			ret = -EINVAL;
+			goto end_auth;
+		}
+
+		if (i == 0) {
+			spl_image->load_addr = image->dst;
+			spl_image->entry_point = image->entry;
+		}
+	}
+
+end_auth:
+#ifdef CONFIG_AHAB_BOOT
+	ahab_auth_release();
+#endif
+
+end:
+	free(container);
+
+	return ret;
+}
+
+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);
+}