Renesas SuperH SH-4A, Software Manual

Page: 144 / 472

Rev. 1.50, 10/04, page 124 of 448
7.2.3 Translation Table Base Register (TTB)
TTB is used to store the base address of the currently used page table, and so on. The contents of
TTB are not changed unless a software directive is issued. This register can be used freely by
software.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Bit:
Initial value:
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
R/W R/W R/W
TTB
TTB
R/W R/W R/W R/W R/W
R/W:
Bit:
Initial value:
R/W:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R/W R/W R/W R/W R/W R/W R/W R/W
7.2.4 TLB Exception Address Register (TEA)
After an MMU exception or address error exception occurs, the virtual address at which the
exception occurred is stored. The contents of this register can be changed by software.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
               
   
 
   

    
Bit:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Initial value:
R R R R R R R R R R R R R R R R
R R R
TC SA2 SA1 SA0
R R/W R/W R/W R/W
R/W:
Bit:
Initial value:
R/W:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0 0
R R R R R R R R