s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 534

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

PROGRAMMER'S MODEL
Addresses in ARM920T
Three distinct types of address exist in an ARM920T system:
Below is an example of the address manipulation when the ARM9TDMI requests an instruction.
1) The VA of the instruction (IVA) is issued by the ARM9TDMI.
2) This is translated by the ProcID to the instruction MVA (IMVA). It is the IMVA that the instruction cache and
3) If the protection check carried out by the IMMU on the IMVA does not abort and the IMVA tag is in the
4) If the instruction cache misses (the IMVA tag is not in the instruction cache) then the IMMU performs a
2-6
virtual address (VA)
modified virtual address (MVA)
physical address (PA).
MMU see.
instruction cache the instruction data is returned to the ARM9TDMI.
translation to produce the instruction PA (IPA). This address is given to the AMBA bus interface to perform an
external access
Domain
Address
Table 2-4. Address Types in ARM920
Domain
Virtual
Caches & TLBs
Modified Virtual
ARM920T PROCESSOR
AMBA bus
Physical