Segmentation suspend mode for real-time interrupt support

Details Segmentation suspend mode for real-time interrupt support Segmentation suspend mode for real-time interrupt support

1996-05-17

1999-06-29

Sheikh, Ayaz R.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

395739, 395740, 395741, 395742, 711207, 711208, G06F 1300

Patent

active

059180560

ABSTRACT:
A device and method that suspends segmentation addressing and prevents the modification of segmentation information (the segment registers and segment descriptors). By suspending segmentation addressing and preventing modification of segmentation information, the segmentation information does not have to be saved and restored by an interrupt. This reduces the overhead of the interrupt and allows the interrupt to be used in situations that are unfeasible for interrupts with larger overheads. When segmentation addressing is suspended, physical addresses are obtained from operands of the interrupt service routine instructions. Preventing the modification of the segmentation information allows operation of the processor to be transparently resumed after the completion of the interrupt.

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