U-Boot
ATCA-8310 Installation and Use (6806800M72D
)
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:
z
The content of the NVRAM (an I2C EEPROM), OR (if the NVRAM's CRC is invalid) a set of
compiled-in defaults.
z
The content of the IPMI boot parameter storage.
z
Dynamic variables set during the boot-up phase.
z
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
Summary of Contents for ATCA-8310
Page 12: ...ATCA 8310 Installation and Use 6806800M72D Contents 12 Contents Contents ...
Page 26: ...ATCA 8310 Installation and Use 6806800M72D 26 List of Figures ...
Page 34: ...ATCA 8310 Installation and Use 6806800M72D About this Manual 34 About this Manual ...
Page 54: ...Hardware Preparation and Installation ATCA 8310 Installation and Use 6806800M72D 54 ...
Page 70: ...Controls Indicators and Connectors ATCA 8310 Installation and Use 6806800M72D 70 ...
Page 162: ...BIOS ATCA 8310 Installation and Use 6806800M72D 162 ...
Page 200: ...U Boot ATCA 8310 Installation and Use 6806800M72D 200 ...
Page 244: ...Intelligent Peripheral Management Controller ATCA 8310 Installation and Use 6806800M72D 244 ...
Page 438: ...CPLD and FPGA ATCA 8310 Installation and Use 6806800M72D 438 ...
Page 442: ...Replacing the Battery ATCA 8310 Installation and Use 6806800M72D 442 ...
Page 444: ...Related Documentation ATCA 8310 Installation and Use 6806800M72D 444 ...
Page 454: ...ATCA 8310 Installation and Use 6806800M72D Sicherheitshinweise 454 ...
Page 456: ...Index ATCA 8310 Installation and Use 6806800M72D 456 ...
Page 457: ...Index ATCA 8310 Installation and Use 6806800M72D 457 ...
Page 458: ...Index ATCA 8310 Installation and Use 6806800M72D 458 ...
Page 459: ......