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pieeprom-2025-01-27: 2712: Add PARTITION_WALK option (latest)

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* Walk the partition table if the requested partition is not bootable
  Previously, if the specified boot partition was not bootable the
  bootloader would stop and advance to the next BOOT_ORDER. If the
  new PARTITION_WALK option is set to 1 the bootloader will now
  check each partition in turn starting from the specified partition
  before advancing the BOOT_ORDER.
  This feature is intended for use with A/B systems to handle the case
  where autoboot.txt is missing / corrupted. This change enables
  the system to failover to the next available bootable partition.
  The autoboot.txt file is not scanned during the partition-walk
  phase i.e. there is no recursive processing of autoboot.txt files.
  This option is only supported on physical block devices
  (SD, NVMe, USB) and not RAMDISK. USB assumes a single high speed
  device, partition walks on multiple USB devices is not recommended
  and may cause timeouts.
* Improve keyboard handling in boot menu
  Try and make it more likely that we have enough time to perform key
  detection.
  Ignore mice, which were being enumerated and slowing things down.
This commit is contained in:
Tim Gover
2025-01-27 19:17:51 +00:00
committed by timg236
parent b67b21ddda
commit 0190dbc122
3 changed files with 22 additions and 0 deletions
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firmware-2712/release-notes.md
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# Raspberry Pi5 bootloader EEPROM release notes # Raspberry Pi5 bootloader EEPROM release notes
## 2025-01-27: Walk the partition table if the requested partition is not bootable (latest)
* Walk the partition table if the requested partition is not bootable
Previously, if the specified boot partition was not bootable the
bootloader would stop and advance to the next BOOT_ORDER. If the
new PARTITION_WALK option is set to 1 the bootloader will now
check each partition in turn starting from the specified partition
before advancing the BOOT_ORDER.
This feature is intended for use with A/B systems to handle the case
where autoboot.txt is missing / corrupted. This change enables
the system to failover to the next available bootable partition.
The autoboot.txt file is not scanned during the partition-walk
phase i.e. there is no recursive processing of autoboot.txt files.
This option is only supported on physical block devices
(SD, NVMe, USB) and not RAMDISK. USB assumes a single high speed
device, partition walks on multiple USB devices is not recommended
and may cause timeouts.
* Improve keyboard handling in boot menu
Try and make it more likely that we have enough time to perform key
detection.
Ignore mice, which were being enumerated and slowing things down.
## 2025-01-22: Promote 2025-01-22 to default release (default) ## 2025-01-22: Promote 2025-01-22 to default release (default)
## 2025-01-22: Add DT /chosen property signed-boot boot.img hash (latest) ## 2025-01-22: Add DT /chosen property signed-boot boot.img hash (latest)