US5493661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for providing a program call to a dispatchable unit's base space
Assignee: International Business Machines Corp
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Filing: 1992-03-06
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Granted: 1996-02-20
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Expires: 2012-03-06
Abstract
Abstract A method and system for providing a PROGRAM CALL to a dispatchable unit's base space is described herein. A program call to a dispatchable unit's (PC to DU) base space bit is added to each entry-table entry in order to determine whether a PROGRAM CALL to a base space is to be made. Should the bit indicate that a PROGRAM CALL to a dispatchable unit's base space is to be made, then in one embodiment, the base address space number-second-table entry origin (BASTEO) and base address space number (BASN) stored in the dispatchable unit control table (DUCT) are used in identifying the base space and accessing associated control information for the identified base space. In another embodiment, the BASN stored in the DUCT is used in ASN translation to identify the base space and access the associated control information for the base space.
Inventors
- 👤 Alan I. Alpert
- 👤 Carl E. Clark
- 👤 Jeffrey A. Frey
- 👤 Michael G. Mall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:33
CPC Classifications
G; G06; G06F; G06F12/00; G06F12/02; G06F12/08; G06F12/10; G06F12/109
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
99 words
A method for accessing an address space, said method comprising the steps of: a) executing, via a program running under control of a work unit, a Program Call from an address space in which said program is running to a base address space of said work unit, said base address space to be identified during execution of said Program Call; and (b) retrieving, during execution of said Program Call, a parameter from a control table particularly associated with said work unit to identify said base address space being called: including retrieving said parameter from a dispatchable unit control table.
Claim 2
Independent Claim
99 words
A method for accessing an address space, said method comprising the steps of: a) executing, via a program running under control of a work unit, a Program Call from an address space in which said program is running to a base address space of said work unit, said base address space to be identified during execution of said Program Call; and (b) retrieving, during execution of said Program Call, a parameter from a control table particularly associated with said work unit to identify said base address space being called: including retrieving said parameter from a dispatchable unit control table.
Claim 3
Dependent Claim
15 words
The method of claim 1, wherein said retrieved parameter comprises a base address space number.
Claim 4
Dependent Claim
58 words
The method of claim 1, further comprising the step of retrieving at least one additional parameter from said control table for accessing associated control information for the identified base address space, said at least one additional parameter comprising a base address space number-second-table entry origin used to locate an address space number-second-table entry comprising said associated control information.
Claim 5
Dependent Claim
19 words
The method of claim 3, further comprising the step of determining a continued availability of the base address space.
Claim 6
Dependent Claim
49 words
The method of claim 4, wherein said step of determining includes the steps of: determining whether said address space number-second-table entry is valid; and comparing a base address space number-second-table entry sequence number with an address space number-second-table entry sequence number when said address space number-second-table entry is valid.
Claim 7
Dependent Claim
39 words
The method of claim 5, wherein said base address space number-second-table entry sequence number is stored in a dispatchable unit control table and wherein said address space number-second-table entry sequence number is stored in said address space number-second-table entry.
Claim 8
Dependent Claim
46 words
The method of claim 1, wherein said retrieved parameter comprises a base address space number and said method further comprises the step of: performing an address space number translation using said base address space number to access associated control information for the identified base address space.
Claim 9
Dependent Claim
76 words
The method of claim 1, further comprising executing via a second program running under control of a second work unit a second Program Call to a base address space of said second work unit, said second Program Call having a same Program Call number as said Program Call of step (a), and wherein said base address space of said second work unit is different from said base address space of said work unit of step (a).
Claim 10
Dependent Claim
45 words
The method of claim 1, wherein said step of executing comprises checking an indicator to determine whether said base address space is to be accessed, and wherein said step of retrieving is performed when said indicator indicates said base address space is to be accessed.
Claim 11
Dependent Claim
14 words
The method of claim 9, wherein said indicator is located in an entry-table entry.
Claim 12
Independent Claim
100 words
A system for accessing an address space, comprising: means for executing, via a program running under control of a work unit, a Program Call from an address space in which said program is running to a base address space of said work unit, said base address space to be identified during execution of said Program Call; and means for retrieving, during execution of said Program Call, a parameter from a control table particularly associated with said work unit to identify said base address space being called, wherein said means for retrieving retrieves said parameter from a dispatchable unit control table.
Claim 13
Independent Claim
100 words
A system for accessing an address space, comprising: means for executing, via a program running under control of a work unit, a Program Call from an address space in which said program is running to a base address space of said work unit, said base address space to be identified during execution of said Program Call; and means for retrieving, during execution of said Program Call, a parameter from a control table particularly associated with said work unit to identify said base address space being called, wherein said means for retrieving retrieves said parameter from a dispatchable unit control table.
Claim 14
Dependent Claim
15 words
The system of claim 11, wherein said retrieved parameter comprises a base address space number.
Claim 15
Dependent Claim
57 words
The system of claim 11, further comprising means for retrieving at least one additional parameter from said control table for accessing associated control information for the identified base address space, said at least one additional parameter comprising a base address space number-second-table entry origin used to locate an address space number-second-table entry comprising said associated control information.
Claim 16
Dependent Claim
18 words
The system of claim 13, further comprising means for determining a continued availability of the base address space.
Claim 17
Dependent Claim
50 words
The system of claim 14, wherein said means for determining includes: means for determining whether said address space number-second-table entry is valid; and means for comparing a base address space number-second-table entry sequence number with an address space number-second-table entry sequence number when said address space number-second-table entry is valid.
Claim 18
Dependent Claim
39 words
The system of claim 15, wherein said base address space number-second-table entry sequence number is stored in a dispatchable unit control table and wherein said address space number-second-table entry sequence number is stored in said address space number-second-table entry.
Claim 19
Dependent Claim
45 words
The system of claim 11, wherein said retrieved parameter comprises a base address space number and said system further comprises means for performing an address space number translation using said base address space number to access associated control information for the identified base address space.
Claim 20
Dependent Claim
72 words
The system of claim 11, further comprising means for executing via a second program running under control of a second work unit a second Program Call to a base address space of said second work unit, said second Program Call having a same Program Call number as said Program Call, and wherein said base address space of said second work unit is different from said base address space of said work unit.
Claim 21
Dependent Claim
47 words
The system of claim 11, wherein said means for executing comprises means for checking an indicator to determine whether said base address space is to be accessed, and wherein said means for retrieving is performed when said indicator indicates said base address space is to be accessed.
Claim 22
Dependent Claim
14 words
The system of claim 19, wherein said indicator is located in an entry-table entry.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |