Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Patent
1996-06-28
2000-03-28
Gossage, Glenn
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
711152, 711165, 711203, 711209, G06F 1210, G06F 1300, G06F 1214
Patent
active
060444452
ABSTRACT:
A data transfer method and a memory management system capable of improving a data transfer efficiency for data transfer between a device interface and a user space. A data transfer method and a memory management system capable of frame buffer, or (another) device interface, and for data transfer between processes. A data transfer from a transfer source device interface to a transfer destination user space, frame buffer, or (another) device interface is controlled according to an access control information provided in a kernel space, which indicates a permitted access with respect to a data block for the transfer source device interface. A data transfer between processes is controlled according to an access control information indicating a permitted access with respect to a physical page storing a transfer data, by changing a mapping between the physical page and a virtual page according to the access control information.
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Nakamura Akira
Okamoto Toshio
Tsuda Yoshiyuki
Gossage Glenn
Kabushiki Kaisha Toshiba
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