mirror of
https://github.com/AsahiLinux/u-boot
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6d295099cc
So far we used the separate mksunxiboot tool for generating a bootable image for Allwinner SPLs, probably just for historical reasons. Use the mkimage framework to generate a so called eGON image the Allwinner BROM expects. The new image type is called "sunxi_egon", to differentiate it from the (still to be implemented) secure boot TOC0 image. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net> Reviewed-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Simon Glass <sjg@chromium.org>
136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
// 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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#include "imagetool.h"
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#include <image.h>
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#include <sunxi_image.h>
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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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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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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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/* 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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if (memcmp(header->magic, BOOT0_MAGIC, sizeof(header->magic)))
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return EXIT_FAILURE;
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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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* 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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return EXIT_SUCCESS;
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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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printf("Allwinner eGON image, size: %d bytes\n",
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le32_to_cpu(header->length));
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if (memcmp(header->spl_signature, SPL_SIGNATURE, 3))
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return;
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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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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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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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/* 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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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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memcpy(header->spl_signature, SPL_SIGNATURE, 3);
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header->spl_signature[3] = SPL_ENV_HEADER_VERSION;
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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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/* 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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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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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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/* 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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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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