Radix table translation of memory
First Claim
1. A computer implemented method for accessing memory locations, the method comprising:
- receiving a request to access a desired block of memory located in one of a plurality of non-contiguous virtual memory regions, the request comprising an effective address consisting of an effective segment identifier (ESID) and a linear address, the linear address consisting of a most significant portion and a byte index;
locating, by a processor, an entry corresponding to the effective address in a segment lookaside buffer (SLB) that includes multiple entries that include radix page table pointers (RPTPs) corresponding to the plurality of non-contiguous virtual memory regions; and
based on the located entry corresponding to the effective address in the SLB including an RPTP corresponding to the one of the plurality of non-contiguous virtual memory regions, performing;
using the RPTP from the located entry to locate a translation table of a hierarchy of translation tables;
using the located translation table to translate the entirety of the most significant portion of the linear address to obtain an address of a block of memory; and
based on the obtained address, performing the requested access to the desired block of memory.
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Accused Products
Abstract
A method includes receiving a request to access a desired block of memory. The request includes an effective address that includes an effective segment identifier (ESID) and a linear address, the linear address comprising a most significant portion and a byte index. Locating an entry, in a buffer, the entry including the ESID of the effective address. Based on the entry including a radix page table pointer (RPTP), performing, using the RPTP to locate a translation table of a hierarchy of translation tables, using the located translation table to translate the most significant portion of the linear address to obtain an address of a block of memory, and based on the obtained address, performing the requested access to the desired block of memory.
65 Citations
8 Claims
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1. A computer implemented method for accessing memory locations, the method comprising:
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receiving a request to access a desired block of memory located in one of a plurality of non-contiguous virtual memory regions, the request comprising an effective address consisting of an effective segment identifier (ESID) and a linear address, the linear address consisting of a most significant portion and a byte index; locating, by a processor, an entry corresponding to the effective address in a segment lookaside buffer (SLB) that includes multiple entries that include radix page table pointers (RPTPs) corresponding to the plurality of non-contiguous virtual memory regions; and based on the located entry corresponding to the effective address in the SLB including an RPTP corresponding to the one of the plurality of non-contiguous virtual memory regions, performing; using the RPTP from the located entry to locate a translation table of a hierarchy of translation tables; using the located translation table to translate the entirety of the most significant portion of the linear address to obtain an address of a block of memory; and based on the obtained address, performing the requested access to the desired block of memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification