diff options
Diffstat (limited to 'include/sysjump.h')
| -rw-r--r-- | include/sysjump.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/sysjump.h b/include/sysjump.h new file mode 100644 index 0000000000..a75351a016 --- /dev/null +++ b/include/sysjump.h @@ -0,0 +1,46 @@ +/* + * 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_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. + */ +}; + +#endif /* __CROS_EC_SYSJUMP_IMPL_H */ |