Artesyn COMX-P4080 Installation and Use (August 2014) - Manual (Page 93)

BSP Operations
COMX-P4080 COM Express Module Installation and Use (6806800L20C) 93
U-Boot uses the following commands to display and modify the contents of the 4 GB effective
address space. Note that ".b", ".w", and ".l" means the operation unit is "byte", "word", and "long"
respectively.
7.8 DDR3 SDRAM
COMX-P4080 has two fully programmable DDR3 SDRAM controllers. A maximum of 2 GB
SDRAM are mapped in U-Boot. If more than 2 GB SDRAM is fitted, the remaining sections are
left unmapped. With Linux, up to 4 GB SDRAM can be verified.
Do not modify the contents of the lowest 1 MB and the top 1 MB RAM in the U-Boot. Both areas
are used to store critical data by U-Boot.
12 F801 0000 F F801 0000 0001 0000 - 64 KB PCIE2 IO
13 F802 0000 F F802 0000 0001 0000 - 64 KB PCIE3 IO
14 FFA0 0000 F FFA0 0000 0010 0000 - 1 MB NAND Flash Buffer
15 FE00 0000 F FE00 0000 0100 0000 - 16 MB CCSR
16 FFFF F000 0 FFFF F000 0000 1000 - 4 KB Boot Page
Table 7-2 COMX-P4080 Address Space (continued)
Address
32-bit Effective
Base Address 36-bit Phyiscal
Base Address
Size Description
md - Memory display
md [.b, .w, .l] address [# of objects]
mm - memory modify (auto-incrementing address)
mm [.b, .w, .l] address
nm - memory modify (constant address)
nm [.b, .w, .l] address
cp - this command copies data from one place to another
cp [.b, .w, .l] source target count
cmp - this command compares two data in different places.
cmp [.b, .w, .l] addr1 addr 2 count