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* arm_loader: Correct some mailbox response lengths The GET_GENCMD_RESULT mailbox handler was setting the wrong response length, and GET_FIRMWARE_COMMIT_HASH and GET_FIRMWARE_VARIANT were not setting any length. See: https://github.com/raspberrypi/firmware/issues/1968 * Signed boot and HTTP boot mode HTTP boot mode is supposed to be disabled if signed boot is enabled and a host is not specified. The code is checking the http_secure flag to enforce this. But this is valid now we support custom CA certs. Only disable HTTP mode if we're using the default HOST. * Implement TCP window for net boot The minimal IP stack used for https booting lacks the ability to cache packets received out of order, which can lead to severe slowdown when it happens. The problem seems to affect some ISPs more than others. The receive window implemented here copes with packet losses of 10%. * netboot: Correct the TCP MSS * rp1_net: Overwrite the length field Although concise, ORing in the packet length runs the risk of leaving some unwanted bits set. Ensure the length field is cleared before ORing in the required value. * Correct msecs in debug timestamps The fractional part of timestamps in UART debug output was showing the 100ths and 1000ths of a second, rather than 10ths and 100ths, causing strange sequences that appear to jump backwards. * Implement GET_BOARD_MAC_ADDRESS on Pi5 The Pi 5 EEPROM implements a subset of the original mailbox properties. Add GET_BOARD_MAC_ADDRESS to the subset. See: https://github.com/raspberrypi/rpi-eeprom/issues/698 * Ensure the initramfs matches the kernel As far as is possible, both the kernel and initramfs are matched to the device. However, where multiple kernel variants can run on a device, the initramfs must be matched to the chosen kernel. Make that the sole rule for initramfs selection, rather than duplicating the device matching logic. See: https://github.com/raspberrypi/firmware/issues/1965 * Enable logging messages from OS loader Pi 5 EEPROM builds were missing the output from the main OS loading function, including some important diagnostics. Enabling the logging output from this loader code results in some near-duplicates, but is more user friendly and is available via "sudo vclog -m".
rpi-eeprom
This repository contains the scripts and pre-compiled binaries used to create the rpi-eeprom package which is used to update the Raspberry Pi 4 and Raspberry Pi 5 bootloaders EEPROM images.
Support
Please check the Raspberry Pi general discussion forum if you have a support question.
Reset to factory defaults
To reset the bootloader back to factory defaults use Raspberry Pi Imager to write an EEPROM update image to a spare SD card. Select Misc utility images under the Operating System tab.