Boot Monitor
LITE5200B User’s Manual, Rev. 0
5-2
Freescale Semiconductor
5.3
Accessing Memory Using U-Boot
The following commands may be used to access any memory mapped locations within the MPC5200.
In PowerPC nomenclature, a byte is 8-bits, a half-word is 16-bits and a word
is 32-bits. In the U-Boot nomenclature, “.b” specifies “byte” or 8-bits, “.w”
specifies “half-word” or 16-bits and “.l” specifies “word” or 32-bits.
5.3.1
MD
The md command may be used to display memory in byte, half word, and word increments. Syntax for this command is:
md [.b, .w, .l] <address>
example:
=> md 0xF0000000
f0000000:0000f000 0000ff00 0000ffff 0000fe00 ................
f0000010:0000feff 0000ffff 0000ffff 0000ffff ................
=> md.l 0xF0000000
f0000000:0000f000 0000ff00 0000ffff 0000fe00 ................
f0000010:0000feff 0000ffff 0000ffff 0000ffff ................
=> md.w 0xF0000000
f0000000:0000 f000 0000 ff00 0000 ffff 0000 fe00 ................
f0000010:0000 feff 0000 ffff 0000 ffff 0000 ffff ................
Reserved
0xF000C000 - 0xFDFFFFFF
Flash - CS1
Unused
0xFE000000 - 0xFEFFFFFF
Flash - CS0 ( BOOT )
Unused
0xFF000000 - 0xFFEFFFFF
Flash - CS0 ( BOOT )
U-Boot
0xFFEFFFFF - 0xFFF7EFFF
Flash - CS0 ( BOOT )
Unused
0xFFF7EFFF - 0xFFFFFFFF
1
Physical memory may be divided into multiple logical sections
Table 5-1. U-Boot Memory Map
Description
1
Usage
Address Range