s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 551

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

ARM920T PROCESSOR
Using the process Identifier (ProcID)
Addresses issued by the ARM9TDMI core in the range 0 to 32MB are translated by CP15 register 13, the ProcID
register. Address A becomes A + (ProcID x 32MB). It is this translated address that is seen by both the Caches and
MMU. Addresses above 32MB undergo no translation. This is shown in Figure 2-8 on page 2-23 .
The ProcID is a seven bit field, enabling 64 x 32MB processes to be mapped.
If ProcID is zero, as it is on reset, then there is a flat mapping between the ARM9TDMI and the Caches and
MMU.
32MB
4GB
0
Figure 2-8. Address Mapping Using CP15 Register 13
issued by ARM9TDMI
Virtual address (VA)
NOTE
C13
Modified virtual address (MVA)
input to caches and MMU
63
2
1
0
4GB
64MB
32MB
0
PROGRAMMER'S MODEL
2-23