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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Common authenticated image format for Google SoCs
*
* Copyright (C) 2022 Google LLC
*/
#ifndef __GCIP_COMMON_IMAGE_HEADER_H__
#define __GCIP_COMMON_IMAGE_HEADER_H__
#include <linux/types.h>
#include "gcip-image-config.h"
#define GCIP_FW_HEADER_SIZE (0x1000)
struct gcip_common_image_sub_header_common {
uint32_t magic;
uint32_t generation;
uint32_t rollback_info;
uint32_t length;
uint8_t flags[16];
};
struct gcip_common_image_sub_header_gen1 {
uint8_t body_hash[32];
uint8_t chip_id[32];
uint8_t auth_config[256];
struct gcip_image_config image_config;
};
struct gcip_common_image_sub_header_gen2 {
uint8_t body_hash[64];
uint8_t chip_id[32];
uint8_t auth_config[256];
struct gcip_image_config image_config;
};
struct gcip_common_image_header {
uint8_t sig[512];
uint8_t pub[512];
struct {
struct gcip_common_image_sub_header_common common;
union {
struct gcip_common_image_sub_header_gen1 gen1;
struct gcip_common_image_sub_header_gen2 gen2;
};
};
};
/*
* Returns the image config field from a common image header
* or NULL if the header has an invalid generation identifier
*/
static inline struct gcip_image_config *
get_image_config_from_hdr(struct gcip_common_image_header *hdr)
{
switch (hdr->common.generation) {
case 1:
return &hdr->gen1.image_config;
case 2:
return &hdr->gen2.image_config;
}
return NULL;
}
#endif /* __GCIP_COMMON_IMAGE_HEADER_H__ */
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