cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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brcm,bcm947xx-cfe-partitions.yaml (1848B)


      1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
      2%YAML 1.2
      3---
      4$id: http://devicetree.org/schemas/mtd/partitions/brcm,bcm947xx-cfe-partitions.yaml#
      5$schema: http://devicetree.org/meta-schemas/core.yaml#
      6
      7title: Broadcom BCM47xx Partitions
      8
      9description: |
     10  Broadcom is one of hardware manufacturers providing SoCs (BCM47xx) used in
     11  home routers. Their BCM947xx boards using CFE bootloader have several
     12  partitions without any on-flash partition table. On some devices their sizes
     13  and/or meanings can also vary so fixed partitioning can't be used.
     14
     15  Discovering partitions on these devices is possible thanks to having a special
     16  header and/or magic signature at the beginning of each of them. They are also
     17  block aligned which is important for determinig a size.
     18
     19  Most of partitions use ASCII text based magic for determining a type. More
     20  complex partitions (like TRX with its HDR0 magic) may include extra header
     21  containing some details, including a length.
     22
     23  A list of supported partitions includes:
     24  1) Bootloader with Broadcom's CFE (Common Firmware Environment)
     25  2) NVRAM with configuration/calibration data
     26  3) Device manufacturer's data with some default values (e.g. SSIDs)
     27  4) TRX firmware container which can hold up to 4 subpartitions
     28  5) Backup TRX firmware used after failed upgrade
     29
     30  As mentioned earlier, role of some partitions may depend on extra
     31  configuration. For example both: main firmware and backup firmware use the
     32  same TRX format with the same header. To distinguish currently used firmware a
     33  CFE's environment variable "bootpartition" is used.
     34
     35maintainers:
     36  - Rafał Miłecki <rafal@milecki.pl>
     37
     38properties:
     39  compatible:
     40    const: brcm,bcm947xx-cfe-partitions
     41
     42additionalProperties: false
     43
     44examples:
     45  - |
     46    partitions {
     47        compatible = "brcm,bcm947xx-cfe-partitions";
     48    };