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Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options
Memory Configuration Defaults:
The default configuration for Dynamic RAM mezzanine boards will position the mezzanine with
the largest memory size to start at the address selected with the "ENV" parameter "Base Address
of Dynamic Memory". The Base Address parameter defaults to 0. The smaller sized mezzanine
will follow immediately above the larger in the memory map. If mezzanines of the same size and
type are present, the first (closest to the board) is mapped to the selected base address. If
mezzanines of same size but with different type (parity and ECC) are present, the parity type will
be mapped to the selected base address and the ECC type mezzanine will follow. The SRAM
does not default to a location in the memory map that is contiguous with Dynamic RAM.
Base Address of Dynamic
Memory
Size of Parity Memory
Size of ECC Memory Board 0
Size of ECC Memory Board 1
Base Address of Static Memory
Size of Static Memory
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Configure and Environment Commands
Default
00000000
Beginning address of Dynamic Memory (Parity
and/or ECC type memory). It must be a
multiple of the Dynamic Memory board size,
starting with 0. Default is $0.
00100000
This is the size of the Parity type dynamic
RAM mezzanine, if any. The default is the
calculated size of the Dynamic memory
mezzanine board.
00000000
This is the size of the first ECC type memory
mezzanine. The default is the calculated size of
the memory mezzanine.
00000000
This is the size of the second ECC type
memory mezzanine. The default is the
calculated size of the memory mezzanine.
FFE00000 This is the beginning address of SRAM. The
default is FFE00000 for the onboard 128KB
SRAM, or E1000000 for the 2MB SRAM
mezzanine. If only 2MB SRAM is present, it
defaults to address 00000000.
00080000
This is the size of the SRAM type memory
present. The default is the calculated size of the
onboard SRAM or an SRAM type mezzanine.
Meaning of Default
A
A-9
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