Artesyn ATCA-8310 Installation and Use (May 2014) - Manual (Page 164)

U-Boot
ATCA-8310 Installation and Use (6806800M72E) 164
6.2.1.2 Environment Variables
U-Boot uses environment variables to both control the behavior of various U-Boot components
and to report information to user applications.
The working set of the u-boot environment variables is stored in memory and can be accessed
using the setenv and getenv commands. The values of environment variables can have several
origins:
 The content of the NVRAM (an I2C EEPROM), OR (if the NVRAM's CRC is invalid) a set of
compiled-in defaults.
 The content of the IPMI boot parameter storage.
 Dynamic variables set during the boot-up phase.
 Variables set by the user via the u-boot shell.
The above listing basically describes the order of precedence, i.e. a variable stored in the
NVRAM can potentially being overridden, modified or deleted by a variable of the same name
stored in the IPMI boot parameter storage, and later on by dynamic variables declared during
the boot process or by the user from the shell prompt.
SRIO1 0x0.d000.0000
0x0.e000.0000 0xd0000000 Connected to SRIO port 1
on TSI572 switch
SRIO2 0x0.e000.0000
0x0.f000.0000 0xe0000000 Connected to SRIO port 0
on TSI572 switch
FPGA 0x0.f000.0000
0x0.f100.0000 0xf0000000 64K offset between each
16-bit register
BMAN 0x0.f400.0000 0xf4000000 P4080 BMAN resources
QMAN 0x0.f420.0000 0xf4200000 P4080 QMAN resources
P4080 CCSR 0x0.fe00.0000 0xfe000000 P4080 CCSR space
Boot image in L3 Cache 0x0.fff0.0000
0x0.ffff.ffff 0xfff0.0000 Disabled/reconfigured as
L3 cache during boot.
Contents loaded from SPI
boot flash.
Table 6-1 P4080 Address Mode (continued)
Device Physical Address Range Virtual Start address Note