Mitsubishi Denki Kabushiki Kaisha

Renesas Electronics Corporation

Renesas Technology Corp.

Naoto Sugai

Atsushi Settsu

Saburo Kobayashi

Hirokazu Takata

Noriyuki Baba

The present invention provides a technique capable of processing a plurality of interrupt causes sharing one interrupt request in different processors. An interrupt controller outputs an interrupt request when the interrupt request shared by a plurality of interrupt causes is notified. The interrupt request output by the interrupt controller is accepted by one of the processors. The processor accepting the interrupt request determines whether the interrupt cause that the processor must process has occurred, executes an interrupt processing when such interrupt cause has occurred, and notifies the generation of the interrupt request to another processor that processes another interrupt cause of the plurality of interrupt causes sharing the interrupt request when the relevant interrupt cause has not occurred.

Multiprocessor system

A data processing device includes flash memory; nonvolatile memory having an erasure block buffer in which there are stored data recorded in an erasure-unit region of the flash memory; a write control controller for writing into the erasure block buffer write request data, which are to be written into the flash memory; a save unit for saving non-changing data stored in the flash memory to the erasure block buffer; an erasure instruction unit for instructing erasure of the data from the flash memory; and a write unit for writing the data recorded in the erasure block buffer to the flash memory.

Data storage method, and data processing device using an erasure block buffer and write buffer for writing and erasing data in memory

A data processing device includes flash memory ; nonvolatile memory having an erasure block buffer in which there are stored data recorded in an erasure-unit region of the flash memory ; a write controller for writing into the erasure block buffer write request data which are to be written into the flash memory ; a save unit for saving non-changing data stored in the flash memory to the erasure block buffer ; an erasure instruction unit for instructing erasure of the data from the erasure-unit region of flash memory ; and a write unit for writing the data recorded in the erasure block buffer to the flash memory . A comparison may be made between the erasure unit regions into which first and second write data are to be written. The data processing device may further include a write buffer for storing write data.

Data storage method and data processing device using an erasure block buffer and write buffer for writing and erasing data in memory

A method of booting up an information processing apparatus is provided. An operating system is divided into a mini operating system (OS) module having a function of bootstrap and an OS main body module having functions other than the function of bootstrap. The mini OS module can be located in a boot block of a boot device, whereas the OS main body module can be located in a file system of the boot device. A firmware or F/W code module stored in a ROM loads the mini OS module into memory when booting up the information processing apparatus. The mini OS module then loads the OS main body module into memory and then initializes the OS main body module.

Growing community of inventors

Tokyo, Japan

Naoto Sugai