s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 558

• Manufacturer Part Number: s3c2410a
• Description: 16/32-bit Risc Arm Microprocessor
• Manufacturer: Samsung Semiconductor, Inc.

MMU
ARM920T PROCESSOR
HARDWARE TRANSLATION PROCESS
TRANSLATION TABLE BASE
The hardware translation process is initiated when the TLB does not contain a translation for the requested modified
virtual address. The translation table base (TTB) register points to the base address of a table in physical memory
which contains section and/or Page descriptors. The 14 low-order bits of the TTB register are set to zero on a read
and the table must reside on a 16KB boundary.
31
14
13
0
Translation table base
Figure 3-2. Translation Table Base Register
The translation table has up to 4096 x 32-bit entries, each describing 1MB of virtual memory. This allows up to 4GB
of virtual memory to be addressed. Figure 3-1 on page 3-5 illustrates the table walk process.
3-6