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