Apparatus and method for executing rapid memory management unit emulation and full-system simulator

An apparatus for performing rapid memory management unit emulation of a computer program in a computer system, comprising:

• a code translator for translating program code of a target machine into program code of a host machine and allocating address injection space of predefined size;
• an execution unit for executing the translated program code of the host machine;
• a translated code buffer for storing the program code of the host machine translated by said code translator;
• and
• a translation buffer management unit for managing the translated code buffer and the address injection space,
• wherein said address injection space is used to store a virtual page number and a corresponding physical page number,
• when the translation of the program code is executed by the code translator, the virtual page number of a load/store instruction in a code segment in said program code of the target machine is compared with the virtual page number stored in said address injection space, if the two virtual page numbers are the same, then the corresponding physical address is obtained according to the physical page number stored in said address injection space, otherwise, address translation lookaside buffer (TLB) search is executed by the execution unit to obtain the corresponding physical address.

A computer program product embodied in computer readable medium comprising computer executable code for performing rapid memory management unit emulation of a computer program in a computer system, wherein address injection space of predefined size is allocated in the computer system and a virtual page number and its corresponding physical page number are stored in said address injection space, said computer program product configured to:

• obtain the virtual address of a load/store instruction in a code segment in said computer program;
• calculate the virtual page number and page offset of the virtual address;
• compare the calculated virtual page number with the virtual address page number stored in said address injection space;
• if the two virtual page numbers are the same, obtain the corresponding physical address according to the physical page number stored in said address injection space;
• if the two virtual page numbers are not the same, perform address translation lookaside buffer (TLB) search to obtain the corresponding physical address;
• and
• read/write data from/to the obtained corresponding physical address.