Data processing apparatus, and a method of handling address translation within a data processing apparatus
US10133675B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2015 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Jun 22, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing apparatus and method are provided for performing address translation in response to a memory access request issued by processing circuitry of the data processing apparatus and specifying a virtual address for a data item. Address translation circuitry performs an address translation process with reference to at least one descriptor provided by at least one page table, in order to produce a modified memory access request specifying a physical address for the data item. The address translation circuitry includes page table walk circuitry configured to generate at least one page table walk request in order to retrieve the at least one descriptor required for the address translation process. In addition, walk ahead circuitry is located in a path between the address translation circuitry and a memory device containing the at least one page table. The walk ahead circuitry comprises detection circuitry used to detect a memory page table walk request generated by the page table walk circuitry of the address translation circuitry for a descriptor in a page table. In addition, the walk ahead circuitry has further request generation circuitry which is used to generate a pref…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.