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U-Boot
ATCA-F125 (6873M Artwork) Installation and Use (6806800J94K
)
106
To analyze the kernel log files:
1. Issue a reset.
2. Connect to U-Boot. For more information, see
Accessing U-Boot
on page 101
.
3. Using the kernel memory map, find the memory addresses of the kernel logs.
4. To display the kernel logfile at any of these memory addresses, enter the following
command:
.printf (<memory address>)
The persistent memory feature can also be useful in the storage of application-specific data.
Use the standard U-Boot variable
pram
to reserve a memory region (at the end of the physical
memory). This allows the reserved region to not be overwritten by U-Boot. U-Boot reports less
memory to the Linux kernel (through the
mem
parameter) so that Linux will not use it either.
5.6
Memory Map
The following table shows the physical address map of the ATCA-F125.
Table 5-1 Physical Address Map
Device
Start Address
Size
DDR3-RAM
0x00000000
Max. 2 GByte
P2020 CPU
0xFFE00000
32 Kbytes
FPGA
0xFFDF0000
32 Kbytes
BITS1
0xFFA00000
32 Kbytes
BITS2
0xFFA100000
32 Kbytes
Stand-by boot flash
0xE2000000
32 Mbytes
Active boot flash
0xE0000000
32 Mbytes
Regardless which of the two boot flashes is selected as the currently active boot device (using
IPMI), the start address is always mapped to 0xE0000000.
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