Rev. 2.00, 09/03, page 99 of 690
Table 4.3
Way Replacement when a PREF Instruction Misses the Cache
DSP Bit
W3LOAD
W3LOCK
W2LOAD
W2LOCK
Way to be Replaced
0
*
*
*
*
Determined by LRU (table 4.2)
1
*
0
*
0
Determined by LRU (table 4.2)
1
*
0
0
1
Determined by LRU (table 4.5)
1
0
1
*
0
Determined by LRU (table 4.6)
1
0
1
0
1
Determined by LRU (table 4.7)
1
0
*
1
1
Way 2
1
1
1
0
*
Way 3
Notes:
*
Don’t care
W3LOAD and W2LOAD should not be set to 1 at the same time.
Table 4.4
Way Replacement when Instructions other than the PREF Instruction Miss the
Cache
DSP Bit
W3LOAD
W3LOCK
W2LOAD
W2LOCK
Way to be Replaced
0
*
*
*
*
Determined by LRU (table 4.2)
1
*
0
*
0
Determined by LRU (table 4.2)
1
*
0
*
1
Determined by LRU (table 4.5)
1
*
1
*
0
Determined by LRU (table 4.6)
1
*
1
*
1
Determined by LRU (table 4.7)
Notes:
*
Don’t care
W3LOAD and W2LOAD should not be set to 1 at the same time.
Table 4.5
LRU and Way Replacement (when W2LOCK = 1 and W3LOCK = 0)
LRU (Bits 5 to 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 4.6
LRU and Way Replacement (when W2LOCK = 0 and W3LOCK = 1)
LRU (Bits 5 to 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
Summary of Contents for SH7705
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