Method and apparatus for naming input/output devices in a computer system
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United States of America Patent
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-
Jun 17, 1997
Grant Date -
N/A
app pub date -
May 15, 1995
filing date -
May 15, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
Hardware input/output address translation apparatus adapted for use in a multitasking computer system including a circuit which responds to commands from an unprivileged application program addressed to an input/output address for translating the input/output address to a physical address of an input/output device and transferring the command to the physical address of an input/output device, a translation table which responds to commands from an unprivileged application program addressed to an input/output address for selecting from safe translations of input/output addresses to physical address spaces of input/output devices for the first hardware means, each selection of a safe translation being accomplished using an arbitrary name originally provided by the unprivileged application program; and a database of data structures which individually include a physical address of an input/output device and can be copied and named by application programs to provide safe translation for storage in the translation table.
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