ARM ARM1176JZF-S User Manual

Programmer’s Model
ARM DDI 0301H Copyright © 2004-2009 ARM Limited. All rights reserved. 2-7
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The virtual memory address map for the Secure and Non-secure worlds appear as separate
blocks. Figure 2-3 shows how the Secure and Non-secure virtual address spaces might map onto
the physical address space. In this example:
• Non-secure descriptors are stored in Non-secure memory and can only target Non-secure
memory
• Secure descriptors are stored in Secure memory and can target both Secure and
Non-secure memory.
Figure 2-3 Memory partition in the Secure and Non-secure worlds
Non-secure
Virtual memory
32KB on-chip RAM
Non-secure translation
table base address
NS
attribute
Secure
Virtual memory
Physical memory
Non-secure level
1 descriptors
4KB non-secure
4KB non-secure
4KB non-secure
4KB non-secure
4KB non-secure
4KB secure
4KB secure
4KB secure
Secure level 1
descriptors
Non-secure
SDRAM
Secure
peripherals
Non-secure
peripherals
1MB sections
Non-secure level 1
descriptors
1MB sections
Secure level 1
descriptors
4KB small pages
Secure level 2
descriptors
4KB small pages
Non-secure level 2
descriptors
Secure translation
table base address

ARM ARM1176JZF-S Specifications

General

Brand	ARM
Model	ARM1176JZF-S
Category	Computer Hardware
Language	English