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arm,arm-firmware-suite.txt
(442 B)
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brcm,bcm947xx-cfe-partitions.txt
(1.64 KB)
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brcm,bcm963xx-cfe-nor-partitions.txt
(802 B)
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brcm,bcm963xx-imagetag.txt
(995 B)
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brcm,trx.txt
(1.3 KB)
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redboot-fis.txt
(796 B)
Editing: brcm,bcm947xx-cfe-partitions.txt
Broadcom BCM47xx Partitions =========================== Broadcom is one of hardware manufacturers providing SoCs (BCM47xx) used in home routers. Their BCM947xx boards using CFE bootloader have several partitions without any on-flash partition table. On some devices their sizes and/or meanings can also vary so fixed partitioning can't be used. Discovering partitions on these devices is possible thanks to having a special header and/or magic signature at the beginning of each of them. They are also block aligned which is important for determinig a size. Most of partitions use ASCII text based magic for determining a type. More complex partitions (like TRX with its HDR0 magic) may include extra header containing some details, including a length. A list of supported partitions includes: 1) Bootloader with Broadcom's CFE (Common Firmware Environment) 2) NVRAM with configuration/calibration data 3) Device manufacturer's data with some default values (e.g. SSIDs) 4) TRX firmware container which can hold up to 4 subpartitions 5) Backup TRX firmware used after failed upgrade As mentioned earlier, role of some partitions may depend on extra configuration. For example both: main firmware and backup firmware use the same TRX format with the same header. To distinguish currently used firmware a CFE's environment variable "bootpartition" is used. Devices using Broadcom partitions described above should should have flash node with a subnode named "partitions" using following properties: Required properties: - compatible : (required) must be "brcm,bcm947xx-cfe-partitions" Example: flash@0 { partitions { compatible = "brcm,bcm947xx-cfe-partitions"; }; };
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