Artesyn ATCA-F125 Installation and Use Guide (April 2014) - Manual (Page 106)

U-Boot
ATCA-F125 (6873M Artwork) Installation and Use (6806800J94J) 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 ()
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.