參數(shù)資料
型號: 21329
英文描述: AMD-K6 Processor Power Supply Design Application Note AMD-K6 Processor Bios Design Application Note
中文描述: 的AMD - K6處理器電源設(shè)計(jì)應(yīng)用指南的AMD - K6處理器的BIOS設(shè)計(jì)中的應(yīng)用說明
文件頁數(shù): 48/52頁
文件大小: 687K
代理商: 21329
38
Model-Specific Registers (MSRs)
AMD-K6
Processor BIOS Design
21329L/0—December 1999
Figure 14. L2 Tag or Data Location - EDX
When the L2AAR is read or written, EDX is left unchanged.
This facilitates multiple accesses when testing the entire
cache/tag array.
If the L2 cache data is read (as opposed to reading the tag
information), the result (dword) is placed in EAX in the format
as illustrated in Figure 15. Similarly, if the L2 cache data is
written, the write data is taken from EAX.
Reserved
Description
Selects the desired cache set
Selects Line1 (1) or Line0 (0)
Selects one of four octets
Selects upper (1) or lower (0) dword
0
Set
21
31
20 19
17 16
5
15
18
Way
4
3 2
1
6
Symbol
Set
Line
Octet
Dword
Bit
15-6
5
4-3
2
L
i
n
e
Octet
D
w
o
r
d
T
/
D
Symbol
T/D
Way
Description
Selects Tag (1) or Data (0) access
Selects desired cache way
Bit
20
17-16
Table 15. Tag versus Data Selector
Instruction
T/D
(EDX[20])
Operation
RDMSR
0
Read dword from L2 data array into EAX. Dword
location is specified by EDX.
RDMSR
1
Read tag, line state and LRU information from L2 tag
array into EAX. Location of tag is specified by EDX.
WRMSR
0
Write dword to the L2 data array using data in EAX.
Dword location is specified by EDX.
WRMSR
1
Write tag, line state and LRU information into L2 tag
array from EAX. Location of tag is specified by EDX.
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