EP1971925A4 - Methods and systems to restrict usage of a dma channel - Google Patents

Methods and systems to restrict usage of a dma channel

Info

Publication number
EP1971925A4
EP1971925A4 EP06846672A EP06846672A EP1971925A4 EP 1971925 A4 EP1971925 A4 EP 1971925A4 EP 06846672 A EP06846672 A EP 06846672A EP 06846672 A EP06846672 A EP 06846672A EP 1971925 A4 EP1971925 A4 EP 1971925A4
Authority
EP
European Patent Office
Prior art keywords
systems
methods
dma channel
restrict usage
restrict
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06846672A
Other languages
German (de)
French (fr)
Other versions
EP1971925A2 (en
Inventor
Gregory R Conti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/557,298 external-priority patent/US9740887B2/en
Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
Priority to EP06846672A priority Critical patent/EP1971925A4/en
Publication of EP1971925A2 publication Critical patent/EP1971925A2/en
Publication of EP1971925A4 publication Critical patent/EP1971925A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/606—Protecting data by securing the transmission between two devices or processes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/28—Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access DMA, cycle steal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
    • G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/82—Protecting input, output or interconnection devices
    • G06F21/85—Protecting input, output or interconnection devices interconnection devices, e.g. bus-connected or in-line devices
EP06846672A 2005-12-23 2006-12-19 Methods and systems to restrict usage of a dma channel Withdrawn EP1971925A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06846672A EP1971925A4 (en) 2005-12-23 2006-12-19 Methods and systems to restrict usage of a dma channel

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP05927886 2005-12-23
US11/557,298 US9740887B2 (en) 2005-12-23 2006-11-07 Methods and systems to restrict usage of a DMA channel
PCT/US2006/062277 WO2007076340A2 (en) 2005-12-23 2006-12-19 Methods and systems to restrict usage of a dma channel
EP06846672A EP1971925A4 (en) 2005-12-23 2006-12-19 Methods and systems to restrict usage of a dma channel

Publications (2)

Publication Number Publication Date
EP1971925A2 EP1971925A2 (en) 2008-09-24
EP1971925A4 true EP1971925A4 (en) 2009-01-07

Family

ID=39708761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06846672A Withdrawn EP1971925A4 (en) 2005-12-23 2006-12-19 Methods and systems to restrict usage of a dma channel

Country Status (1)

Country Link
EP (1) EP1971925A4 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561817A (en) * 1993-08-16 1996-10-01 Thermo King Corporation Method of securely controlling direct memory access (DMA) of a shared memory by a DMA device on an expansion board
US20040243823A1 (en) * 2003-05-29 2004-12-02 Moyer William C. Method and apparatus for determining access permission
US6898646B1 (en) * 2000-05-03 2005-05-24 Hewlett-Packard Development Company, L.P. Highly concurrent DMA controller with programmable DMA channels
US20050114616A1 (en) * 2002-11-18 2005-05-26 Arm Limited Access control in a data processing apparatus
US20050165783A1 (en) * 2004-01-13 2005-07-28 Hyser Chris D. Secure direct memory access through system controllers and similar hardware devices
US20050259823A1 (en) * 2001-02-28 2005-11-24 George Apostol Jr Security system with an intelligent dma controller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5561817A (en) * 1993-08-16 1996-10-01 Thermo King Corporation Method of securely controlling direct memory access (DMA) of a shared memory by a DMA device on an expansion board
US6898646B1 (en) * 2000-05-03 2005-05-24 Hewlett-Packard Development Company, L.P. Highly concurrent DMA controller with programmable DMA channels
US20050259823A1 (en) * 2001-02-28 2005-11-24 George Apostol Jr Security system with an intelligent dma controller
US20050114616A1 (en) * 2002-11-18 2005-05-26 Arm Limited Access control in a data processing apparatus
US20040243823A1 (en) * 2003-05-29 2004-12-02 Moyer William C. Method and apparatus for determining access permission
US20050165783A1 (en) * 2004-01-13 2005-07-28 Hyser Chris D. Secure direct memory access through system controllers and similar hardware devices

Also Published As

Publication number Publication date
EP1971925A2 (en) 2008-09-24

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 20081024

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Designated state(s): DE FR GB NL

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Effective date: 20081205

RIC1 Information provided on ipc code assigned before grant

Ipc: G06F 21/00 20060101ALI20081202BHEP

Ipc: G06F 13/28 20060101AFI20070822BHEP

17Q First examination report despatched

Effective date: 20090318

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