Software Administration; Table 4-21: On-Board Nor Flash Partition Scheme (128Mb) - Kontron CP6924-1 User Manual

4.5

Software Administration

A running CP6924-1 system requires – after the bootloader has passed control to the kernel – the kernel itself, the root file
system (initrd), the FASTPATH switching application and the IPMI firmware.
The system supports an on-board integrated 1x128 MB NOR flash that is also used as the power-up boot source. It contains
the bootloader as well as the operating system and the application data.
The onboard NOR flash is logically divided into two banks, where the first bank is used during normal system operation. This
flash also contains a backup image that is used to recover the system if the boot image has been corrupted.
Table 4-21:
On-board NOR FLASH Partition Scheme (128MB)
Physical Address Offset in Flash
F8000000 0
F8100000 100000
F8140000 140000
F8180000 180000
FABC0000 2BC0000
FB5C0000 35C0000
FBFC0000 3FC0000
FFF80000 7F80000
FFFE0000 7FE0000
Note...
Note that only flash partition mtd4 is using the JFFS2 file system for storage. All
other flash partitions are not formatted and accessible from linux only as raw
devices.
Note...
The u-boot boot loader uses one flash sector for storing its environment vari-
ables. These can be saved and manipulated from the u-boot CLI and using linux
tools. To enable atomic updates of the environment variables, u-boot uses redun-
dant environment sectors; in case of a failure in completely writing the current
sector (e.g. due to loss of power or reset during writes), it will automatically use
the redundant environment. Therefore each boot monitor uses two flash sectors
(partition mtd2) for storing its environment and redundant copy.
76
Size
Linux Partition Designation
[kB]
1024 mtd0
128
mtd1
128
128
mtd2
128
43264 mtd3
10240 mtd4
10240 mtd5
65280 mtd6
384 mtd7
128 mtd9
Description
u-boot Bootloader based on U-Boot
vpd Vital Product Data
Redundant bootloader envi-
env
ronment (each 128 KB)
Linux system (kernel and ini-
system
trd multi image)
Read/Write Configuration
config
data
profiles Storage for extra profiles
Contains backup image. Copy
backup
of mtd0-5
Reserved area (temporarily
reserved used as upper half of produc-
tion and bringup bootloader)
HW write protected boot firm-
boot-fw
ware based on U-Boot
CP6924-1 User Guide
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