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>
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
// 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
|
|
);
|