User guide

Programmer’s Reference
4-14 Copyright © 2003-2010 ARM Limited. All rights reserved. ARM DUI 0224I
Booting from AHB expansion memory
The memory maps for S1-2 ON (BOOTSEL1 HIGH) and S1-1 ON (BOOTSEL0
HIGH) are shown in Figure 4-4.
The AHB expansion memory on the RealView Logic Tile is on the AHB M2 bus.
Note
If you are booting from static memory on a RealView Logic Tile, jump to the natural
address of your expansion memory before disabling DEVCHIP REMAP.
Figure 4-4 Booting from AHB expansion
0x0
0x07FFFFFF
0x03FFFFFF
0x04000000
Static CS2
Static CS 3
SDRAM CS0
Remapped
memory
0x3C000000
0x38000000
0x3FFFFFFF
0x37FFFFFF
0x3BFFFFFF
0x33FFFFFF
0x30000000
0x34000000
Static CS1
Static CS 0
Static
expansion
Static
expansion
SRAM SRAM
NOR
flash 1
NOR
flash 2
NOR
flash 2
Static
expansion
SRAM
Static
expansion
SRAM
MPMC
SDRAM
MPMC
SDRAM
MPMC
SDRAM
MPMC
SDRAM
MPMC
SDRAM
CS0
MPMC
SDRAM
CS0
AHB
expansion
DEVCHIP REMAP
LOWHIGH HIGHLOW
FPGA_REMAP
LOWHIGH LOWHIGH
State at
reset
SDRAM at
0x0 visible
Normal
operation
(not used)
NOR
flash 1
NOR
flash 1
NOR
flash 1
NOR
flash 2
NOR
flash 2
AHB
expansion