Data transfer method and memory management system utilizing acce

Details Data transfer method and memory management system utilizing acce Data transfer method and memory management system utilizing acce

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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