AMD AMD5K86 - FIGURE 7-4. Test Formats: Data-Cache Data

AMD~
AMD5J116 Processor Technical Reference Manual
18524BjO-Mar1996
7.4.3 Array Test Data
EDX: Array Pointer
31 30 29 28 27
EAX: Test Data
31
28 27
(E1 h) Linear Tag
31
(ECh) Physical Tag
EAX specifies the test data to be read or written with the
RDMSR or WRMSR instruction (see Figures 7-3 through 7-8).
For example, in Figure 7-3 (top) the array pointer in EDX spec-
ifies a way and set within the data-cache linear tag array (Elh
in bits 7-0 of the array pointer) or the physical tag array (ECh
in bits 7-0 of the array pointer). If the linear tag array (Elh)
were accessed, the data read or written includes the tag and
the status bits. The details of the valid fields in EAX are pro-
prietary.
19 18 13 12
Set
Valid Bits
23 22
Valid Bits
8 7
ArraylD
(E1h, ECh)
o
o
o
FIGURE 7-3. Test Formats: Data-Cac:he Tags
7-10
Test and Debug