Renesas SH7709S Manual De Usuario
Rev. 5.00, 09/03, page 108 of 760
Table 5.5
Way Replacement when Instructions Except for PREF Instruction Ended Up in
a Cache Miss
a Cache Miss
DSP bit
W3LOAD
W3LOCK
W2LOAD
W2LOCK
Way to be replaced
0
*
*
*
*
Depends on LRU (table 5.2)
1
*
0
*
0
Depends on LRU (table 5.2)
1
*
0
*
1
Depends on LRU (table 5.6)
1
*
1
*
0
Depends on LRU (table 5.7)
1
*
1
*
1
Depends on LRU (table 5.8)
*
: Don't care
Do not set as W3LOAD=1 and also W2LOAD=1
Table 5.6
LRU and Way Replacement (when W2LOCK=1)
LRU (5–0)
Way to be Replaced
000000, 000001, 000100, 010100, 100000, 100001, 110000, 110100
3
000011, 000110, 000111, 001011, 001111, 010110, 011110, 011111
1
101001, 101011, 111000, 111001, 111011, 111100, 111110, 111111
0
Table 5.7
LRU and Way Replacement (when W3LOCK=1)
LRU (5–0)
Way to be Replaced
000000, 000001, 000011, 001011, 100000, 100001, 101001, 101011
2
000100, 000110, 000111, 001111, 010100, 010110, 011110, 011111
1
110000, 110100, 111000, 111001, 111011, 111100, 111110, 111111
0
Table 5.8
LRU and Way Replacement (when W2LOCK=1 and W3LOCK=1)
LRU (5–0)
Way to be Replaced
000000, 000001, 000011, 000100, 000110, 000111, 001011, 001111,
010100, 010110, 011110, 011111
010100, 010110, 011110, 011111
1
100000, 100001, 101001, 101011, 110000, 110100, 111000, 111001,
111011, 111100, 111110, 111111
111011, 111100, 111110, 111111
0