JPS57162168A - Memory access control system - Google Patents
Memory access control systemInfo
- Publication number
- JPS57162168A JPS57162168A JP56047781A JP4778181A JPS57162168A JP S57162168 A JPS57162168 A JP S57162168A JP 56047781 A JP56047781 A JP 56047781A JP 4778181 A JP4778181 A JP 4778181A JP S57162168 A JPS57162168 A JP S57162168A
- Authority
- JP
- Japan
- Prior art keywords
- moving
- block
- bit information
- change bit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0804—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches with main memory updating
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Memory System Of A Hierarchy Structure (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Debugging And Monitoring (AREA)
Abstract
PURPOSE:To avoid ineffective data from moving out, by discriminating if moving-out to a main storage is to be done or not through a logical product between an effective bit of a block and a change bit. CONSTITUTION:The content of a way block corresponding to a replacement objective block of a swap system buffer memory tag section 1 is selected at a selection circuit 21 and set to a move-out register 15. A move-out logical circuit 6 discriminates if moving-out of the replacement objective block is done to the main storage based on the valid bit information of the selected way block and the change bit information set already in a change bit register 16. The circuit 6 decides the moving-out only when the valid bit information is effective and the change bit information is changed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56047781A JPS57162168A (en) | 1981-03-30 | 1981-03-30 | Memory access control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56047781A JPS57162168A (en) | 1981-03-30 | 1981-03-30 | Memory access control system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57162168A true JPS57162168A (en) | 1982-10-05 |
JPS612978B2 JPS612978B2 (en) | 1986-01-29 |
Family
ID=12784908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56047781A Granted JPS57162168A (en) | 1981-03-30 | 1981-03-30 | Memory access control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57162168A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6263350A (en) * | 1985-06-28 | 1987-03-20 | Yokogawa Hewlett Packard Ltd | Information processor equipped with cache memory |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01137287U (en) * | 1988-03-04 | 1989-09-20 |
-
1981
- 1981-03-30 JP JP56047781A patent/JPS57162168A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6263350A (en) * | 1985-06-28 | 1987-03-20 | Yokogawa Hewlett Packard Ltd | Information processor equipped with cache memory |
Also Published As
Publication number | Publication date |
---|---|
JPS612978B2 (en) | 1986-01-29 |
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