Application processor and a computing system having the same

A computing system, comprising:

• a storage device configured to store multimedia data;
• an application processor configured to translate the multimedia data into output data;
• and
• a display device configured to display the output data,
• wherein the application processor includes
• a system memory unit including one page table;
• a plurality of peripheral devices configured to share the page table and to perform a write operation and a read operation on the system memory unit using the page table, each of the plurality of peripheral devices including a memory management unit (MMU) having a translation lookaside buffer (TLB) that stores a virtual address and a physical address corresponding to the virtual address;
• a control unit configured to divide a total virtual address space corresponding to the page table into a plurality of sub virtual address spaces, to assign the plurality of sub virtual address spaces to the plurality of peripheral devices, respectively, to allocate a direct memory access (DMA) buffer in the system memory unit, to release the DMA buffer from the system memory unit, and to update the page table, at least two of the plurality of sub virtual address spaces having different sizes from each other;
• and
• a central processing unit configured to control the plurality of peripheral devices and the control unit.

An application processor, comprising:

• a system memory unit including one page table, the page table storing virtual addresses each corresponding to physical addresses of memory in the system memory unit;
• a plurality of peripheral devices configured to share the page table;
• a control unit configured to divide a total virtual address space corresponding to the page table into a plurality of sub virtual address spaces, and to assign the plurality of sub virtual address spaces to the plurality of peripheral devices, respectively;
• and
• a central processing unit configured to control the plurality of peripheral devices and the control unit,
• the control unit being configured to receive buffer allocation commands corresponding to the plurality of peripheral devices from the central processing unit, allocate buffer spaces for the peripheral devices in the system memory unit based on the buffer allocation commands in accordance with the sub virtual address spaces corresponding, respectively, to the peripheral devices, update the page table to reflect the allocated buffer spaces, and provide virtual start addresses corresponding to each of the allocated buffer spaces to the central processing unit,
• the peripheral memory devices being configured receive corresponding ones of the virtual start addresses from the central processing unit and to perform a memory read or write operations on the system memory unit based on the virtual start addresses and the page table.