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/*
* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* sysjump implementation-specific structures */
#ifndef __CROS_EC_SYSJUMP_IMPL_H
#define __CROS_EC_SYSJUMP_IMPL_H
#include <inttypes.h>
/*
* Data passed between the current image and the next one when jumping between
* images.
*/
#define JUMP_DATA_MAGIC 0x706d754a /* "Jump" */
#define JUMP_DATA_VERSION 3
#define JUMP_DATA_SIZE_V1 12 /* Size of version 1 jump data struct */
#define JUMP_DATA_SIZE_V2 16 /* Size of version 2 jump data struct */
struct jump_data {
/*
* Add new fields to the _start_ of the struct, since we copy it to the
* _end_ of RAM between images. This way, the magic number will always
* be the last word in RAM regardless of how many fields are added.
*/
/* Fields from version 3 */
uint8_t reserved0; /* (used in proto1 to signal recovery mode) */
int struct_size; /* Size of struct jump_data */
/* Fields from version 2 */
int jump_tag_total; /* Total size of all jump tags */
/* Fields from version 1 */
uint32_t reset_flags; /* Reset flags from the previous boot */
int version; /* Version (JUMP_DATA_VERSION) */
int magic; /* Magic number (JUMP_DATA_MAGIC). If this
* doesn't match at pre-init time, assume no valid
* data from the previous image.
*/
};
/**
* Returns a pointer to the jump data structure.
*/
struct jump_data *get_jump_data(void);
#endif /* __CROS_EC_SYSJUMP_IMPL_H */
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