diff options
Diffstat (limited to 'firmware/include/gpt_misc.h')
| -rw-r--r-- | firmware/include/gpt_misc.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/firmware/include/gpt_misc.h b/firmware/include/gpt_misc.h index 4d91bd8c..53b30347 100644 --- a/firmware/include/gpt_misc.h +++ b/firmware/include/gpt_misc.h @@ -57,6 +57,24 @@ enum { GPT_UPDATE_ENTRY_BAD = 2, }; +enum { + GPT_STORED_ON_DEVICE = 0, /* The GPT is stored on the same device. */ + GPT_STORED_OFF_DEVICE = 1, /* The GPT is stored on another place. */ +}; + +/* + * A note about stored_on_device and gpt_drive_sectors: + * + * This code is used by both the "cgpt" utility and depthcharge/vboot. ATM, + * depthcharge does not have logic to properly setup stored_on_device and + * gpt_drive_sectors, but it does do a memset(gpt, 0, sizeof(GptData)). And so, + * GPT_STORED_ON_DEVICE should be 0 to make stored_on_device compatible with + * present behavior. At the same time, in vboot_kernel:LoadKernel(), and + * cgpt_common:GptLoad(), we need to have simple shims to set gpt_drive_sectors + * to drive_sectors. + * + * TODO(namnguyen): Remove those shims when the firmware can set these fields. + */ typedef struct { /* Fill in the following fields before calling GptInit() */ /* GPT primary header, from sector 1 of disk (size: 512 bytes) */ @@ -69,8 +87,12 @@ typedef struct { uint8_t *secondary_entries; /* Size of a LBA sector, in bytes */ uint32_t sector_bytes; - /* Size of drive in LBA sectors, in sectors */ + /* Size of drive (that the partitions are on) in LBA sectors */ uint64_t drive_sectors; + /* Are the GPT structures stored on the same device */ + uint8_t stored_on_device; + /* Size of the device that holds the GPT structures, 512-byte sectors */ + uint64_t gpt_drive_sectors; /* Outputs */ /* Which inputs have been modified? GPT_MODIFIED_* */ @@ -98,6 +120,8 @@ typedef struct { * secondary_entries * sector_bytes * drive_sectors + * stored_on_device + * gpt_device_sectors * * On return the modified field may be set, if the GPT data has been modified * and should be written to disk. |