Real time paged computing device and method of operation
A computing device and paging technology, applied in computing, multiprogramming device, memory address/allocation/relocation, etc., can solve the problems that the system cannot be regarded as a practical solution
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[0041] figure 1 Schematically shows how on-demand paging can be performed.
[0042] It is common for the MMU of a computing device to translate virtual memory addresses to physical memory addresses by means of one or more Translation Lookaside Buffers (TLBs).
[0043] figure 1 shows that in the case of a two-level page table implementation based on 4K pages (as in Intel TM x86 and many ARMs TM An example of how this works as implemented in . On these processors, the MMU translates a "virtual" 32-bit address2 (which can map four gigabytes of "virtual" address space within memory) into a "physical" 32-bit address through a series of table lookups.
[0044] The most significant ten bits 4 of the virtual address 2 are indexed into a 4K table 6 called the page directory, which includes 1024 32-bit values. Each of the 32-bit values of the page directory table 6 is called a page directory entry (PDE). The PDE indexed by the most significant ten bits of virtual address 2 is a ...
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