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    • 1. 发明申请
    • INFORMATION PROCESSING APPARATUS
    • 信息处理装置
    • US20110113216A1
    • 2011-05-12
    • US12674669
    • 2007-08-31
    • Kouichi ToitaNobutoshi HigakiToshihiro Hishida
    • Kouichi ToitaNobutoshi HigakiToshihiro Hishida
    • G06F12/10G06F12/00
    • G06F12/0638G06F12/0292G06F12/10
    • An information processing apparatus includes: a ROM for storing a program therein; a RAM for temporarily storing therein the program read from the ROM; a program execution unit that is adapted to read and execute the program from the ROM or the RAM; a memory management unit that translates a virtual address output by the program execution unit to a physical address of the ROM or the RAM; a page table storage unit for storing therein a page table which is referred to by the memory management unit, and in which mapping data of a virtual address with a physical address of the ROM or the RAM corresponding to the virtual address is stored; a detection unit that detects change of an event in the information processing apparatus; an operation switching unit that is adapted to instruct, when the detection unit detects the change of the event during a ROM-operation in which the program execution unit reads the program from the ROM, switching from the ROM-operation to a RAM-operation in which the program execution unit reads the program from the RAM; and a page table updating unit that updates the page table which is referred to by the memory management unit, depending on the instruction of the operation switching unit.
    • 一种信息处理设备,包括:用于存储程序的ROM; 用于暂时存储从ROM读取的程序的RAM; 程序执行单元,适于从ROM或RAM读取和执行程序; 存储器管理单元,将由程序执行单元输出的虚拟地址转换为ROM或RAM的物理地址; 页表存储单元,用于在其中存储由存储器管理单元参考的页表,并且存储具有与虚拟地址相对应的ROM或RAM的物理地址的虚拟地址的映射数据; 检测单元,其检测所述信息处理设备中的事件的变化; 操作切换单元,其用于在所述检测单元检测到所述程序执行单元从ROM读取程序的ROM操作期间检测到所述事件的变化时,指示从所述ROM操作切换到RAM操作 程序执行单元从RAM读取程序; 以及页表更新单元,其根据操作切换单元的指示来更新由存储器管理单元参考的页表。