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@@ -0,0 +1,136 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * (C) Copyright 2018 Arm Ltd.
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+ */
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+
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+#include "imagetool.h"
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+#include <image.h>
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+
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+#include <sunxi_image.h>
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+
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+/*
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+ * NAND requires 8K padding. SD/eMMC gets away with 512 bytes,
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+ * but let's use the larger padding to cover both.
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+ */
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+#define PAD_SIZE 8192
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+
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+static int egon_check_params(struct image_tool_params *params)
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+{
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+ /* We just need a binary image file. */
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+ return !params->dflag;
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+}
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+
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+static int egon_verify_header(unsigned char *ptr, int image_size,
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+ struct image_tool_params *params)
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+{
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+ const struct boot_file_head *header = (void *)ptr;
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+ uint32_t length;
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+
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+ /* First 4 bytes must be an ARM branch instruction. */
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+ if ((le32_to_cpu(header->b_instruction) & 0xff000000) != 0xea000000)
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+ return EXIT_FAILURE;
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+
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+ if (memcmp(header->magic, BOOT0_MAGIC, sizeof(header->magic)))
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+ return EXIT_FAILURE;
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+
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+ length = le32_to_cpu(header->length);
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+ /* Must be at least 512 byte aligned. */
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+ if (length & 511)
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+ return EXIT_FAILURE;
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+
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+ /*
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+ * Image could also contain U-Boot proper, so could be bigger.
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+ * But it must not be shorter.
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+ */
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+ if (image_size < length)
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+ return EXIT_FAILURE;
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+
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+ return EXIT_SUCCESS;
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+}
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+
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+static void egon_print_header(const void *buf)
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+{
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+ const struct boot_file_head *header = buf;
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+
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+ printf("Allwinner eGON image, size: %d bytes\n",
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+ le32_to_cpu(header->length));
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+
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+ if (memcmp(header->spl_signature, SPL_SIGNATURE, 3))
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+ return;
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+
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+ printf("\tSPL header version %d.%d\n",
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+ header->spl_signature[3] >> SPL_MINOR_BITS,
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+ header->spl_signature[3] & ((1U << SPL_MINOR_BITS) - 1));
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+ if (header->spl_signature[3] >= SPL_DT_HEADER_VERSION) {
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+ uint32_t dt_name_offs = le32_to_cpu(header->dt_name_offset);
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+
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+ if (dt_name_offs > 0)
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+ printf("\tDT name: %s\n", (char *)buf + dt_name_offs);
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+ }
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+}
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+
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+static void egon_set_header(void *buf, struct stat *sbuf, int infd,
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+ struct image_tool_params *params)
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+{
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+ struct boot_file_head *header = buf;
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+ uint32_t *buf32 = buf;
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+ uint32_t checksum = 0, value;
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+ int i;
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+
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+ /* Generate an ARM branch instruction to jump over the header. */
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+ value = 0xea000000 | (sizeof(struct boot_file_head) / 4 - 2);
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+ header->b_instruction = cpu_to_le32(value);
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+
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+ memcpy(header->magic, BOOT0_MAGIC, sizeof(header->magic));
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+ header->check_sum = cpu_to_le32(BROM_STAMP_VALUE);
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+ header->length = cpu_to_le32(params->file_size);
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+
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+ memcpy(header->spl_signature, SPL_SIGNATURE, 3);
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+ header->spl_signature[3] = SPL_ENV_HEADER_VERSION;
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+
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+ /* If an image name has been provided, use it as the DT name. */
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+ if (params->imagename && params->imagename[0]) {
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+ if (strlen(params->imagename) > sizeof(header->string_pool) - 1)
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+ printf("WARNING: DT name too long for SPL header!\n");
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+ else {
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+ strcpy((char *)header->string_pool, params->imagename);
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+ value = offsetof(struct boot_file_head, string_pool);
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+ header->dt_name_offset = cpu_to_le32(value);
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+ header->spl_signature[3] = SPL_DT_HEADER_VERSION;
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+ }
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+ }
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+
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+ /* Calculate the checksum. Yes, it's that simple. */
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+ for (i = 0; i < sbuf->st_size / 4; i++)
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+ checksum += le32_to_cpu(buf32[i]);
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+ header->check_sum = cpu_to_le32(checksum);
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+}
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+
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+static int egon_check_image_type(uint8_t type)
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+{
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+ return type == IH_TYPE_SUNXI_EGON ? 0 : 1;
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+}
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+
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+static int egon_vrec_header(struct image_tool_params *params,
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+ struct image_type_params *tparams)
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+{
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+ tparams->hdr = calloc(sizeof(struct boot_file_head), 1);
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+
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+ /* Return padding to 8K blocks. */
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+ return ALIGN(params->file_size, PAD_SIZE) - params->file_size;
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+}
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+
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+U_BOOT_IMAGE_TYPE(
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+ sunxi_egon,
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+ "Allwinner eGON Boot Image support",
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+ sizeof(struct boot_file_head),
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+ NULL,
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+ egon_check_params,
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+ egon_verify_header,
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+ egon_print_header,
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+ egon_set_header,
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+ NULL,
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+ egon_check_image_type,
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+ NULL,
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+ egon_vrec_header
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+);
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