JP2000513471A - コンピュータシステムのi/oアドレス空間にマップされたレジスタへのアクセスを制御するためのシステム - Google Patents
コンピュータシステムのi/oアドレス空間にマップされたレジスタへのアクセスを制御するためのシステムInfo
- Publication number
- JP2000513471A JP2000513471A JP10502985A JP50298598A JP2000513471A JP 2000513471 A JP2000513471 A JP 2000513471A JP 10502985 A JP10502985 A JP 10502985A JP 50298598 A JP50298598 A JP 50298598A JP 2000513471 A JP2000513471 A JP 2000513471A
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- 238000000034 method Methods 0.000 claims abstract description 38
- 230000004044 response Effects 0.000 claims abstract description 6
- 230000006870 function Effects 0.000 description 16
- 230000007246 mechanism Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 241000700605 Viruses Species 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000003139 buffering effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
- G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
- G06F9/3867—Concurrent instruction execution, e.g. pipeline or look ahead using instruction pipelines
- G06F9/3869—Implementation aspects, e.g. pipeline latches; pipeline synchronisation and clocking
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Storage Device Security (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.第1及び第2の動作モードで動作可能なプロセッサを具備するコンピュータ システムの入出力(I/O)マップレジスタへのアクセスを可能にする方法にお いて: I/Oマップレジスタへのアクセス要求を受け取るステップと; プロセッサが第1の動作モードで動作しているかどうかを調べるステップと; プロセッサが第1の動作モードで動作していればI/Oマップレジスタへの第 1の型のアクセスを可能にするステップと; プロセッサが第1の動作モードで動作していなければI/Oマップレジスタへ の第2の型のアクセスを可能にするステップと; を具備した方法。 2.上記第1の動作モードがプロセッサが専用のシステム管理メモリアドレス空 間にアクセスするシステム管理モードであり、上記の調べるステップがプロセッ サがシステム管理モードで動作しているかどうかを調べるステップよりなる請求 項1記載の方法。 3.上記I/Oマップレジスタへの第1の型のアクセスが可能な場合に、上記専 用のシステム管理メモリアドレス空間に記憶されたコードの指示の下に、そのI /Oマップレジスタの内容に対して演算を実行するステップをさらに具備した請 求項2記載の方法。 4.プロセッサが上記第1の動作モードで動作していないとき所定のアクセス型 に対してI/Oマップレジスタに保護を講じるよう、上記第2の型のアクセスが 第1の型のアクセスに対して相対的に制限される請求項1記載の方法。 5.第1の型のアクセスを可能にする上記ステップが、少なくともI/Oマップ レジスタへの読出しアクセスを可能にするステップからなり、第2の型のアクセ スを可能にする上記ステップが、I/Oマップレジスタへのアクセスを阻止する ステップからなる請求項4記載の方法。 6.第1の型のアクセスを可能にする上記ステップがI/Oマップレジスタへの 読出し及び書込みの両方のアクセスを可能にするステップからなる請求項5記載 の方法。 7.第1の型のアクセスを可能にする上記ステップが、I/Oマップレジスタへ の読出し及び書込みの両方のアクセスを可能にするステップからなり、第2の型 のアクセスを可能にする上記ステップがI/Oマップレジスタへの読出しアクセ スのみを可能にするステップからなる請求項4記載の方法。 8.プロセッサがシステム管理モードで動作しているかどうかを調べる上記ステ ツプが: プロセッサからシステム管理モード状態信号を受け取るステップと; そのシステム管理モード状態信号を監視して、プロセッサがシステム管理モー ドで動作しているかどうかを確認するステップと; からなる請求項2記載の方法。 9.コンピュータシステムの入出力(I/O)アドレス空間にマップされたレジ スタへのアクセスを可能にする方法において: プロセッサでシステム管理要求を受け取るステップと; そのシステム管理要求に応答してプロセッサをシステム管理モードにするステ ップと; プロセッサにコンピュータシステムの入出力(I/O)アドレス空間にマップ されたレジスタへの第1の型のアクセス権を与えるステップと; そのレジスタの内容に対して演算を実行するステップと; プロセッサをシステム管理モードから出すステップと; プロセッサにそのレジスタへの第2の型のアクセス権を与えるステップと; を具備した方法。 10.コンピュータシステムが、プロセッサがシステム管理モードになっている とき専用のSMMメモリアドレス空間にアクセスし、上記レジスタの内容に対す る演算がSMMメモリアドレス空間に記憧されたコードの指示の下にプロセッサ によって実行される請求項9記載の方法。 11.第1及び第2の動作モードで動作可能なコンピュータシステムで使用する ためのインタフェース装置において: 入出力(I/O)アドレス空間にマップされたレジスタと; そのレジスタを識別するためのアドレスデータを受け取るように接続された入 力と、アドレスデータがそのレジスタを識別していることを示すセレクト信号を 出力するよう接続された出力とを有するデコーダと; コンピュータシステムが第1の動作モードで動作しているときそれを検知する よう構成され、かつコンピュータシステムが第1のモードで動作しているときそ のレジスタへの第1の型のアクセスを可能にし、コンピュータシステムが第1の モードで動作していないときは第2の型のアクセスを可能にするよう構成された 論理回路と; を具備したインタフェース装置。 12.上記第1の動作モードが、コンピュータシステムのプロセッサが専用のシ ステム管理メモリアドレス空間にアクセスするシステム管理モードであり、上記 論理回路がそのプロセッサがシステム管理モードで動作しているとき上記レジス タへの第1の型のアクセスを可能にするよう構成されている請求項11記載のイ ンタフェース装置。 13.上記論理回路が、コンピュータシステムのプロセッサからコンピュータシ ステムが第1の動作モードで動作していることを示す信号を受け取るよう接続さ れた入力を有する請求項11記載のインタフェース装置。 14.プロセッサが上記第1の動作モードで動作していないとき所定のアクセス 型に対して上記レジスタに保護を講じるよう、上記第2の型のアクセスが第1の 型のアクセスに対して相対的に制限される請求項11記載のインタフェース装置 。 15.上記論理回路が、コンピュータシステムが第1の動作モードで動作してい るとき少なくとも上記レジスタへの読出しアクセスを可能にし、コンピュータシ ステムが第1の動作モードで動作していないときはレジスタへのアクセスを阻止 するよう構成されている請求項14記載のインタフェース装置。 16.上記論理回路が、コンピュータシステムが第1の動作モードで動作してい るとき上記レジスタへの読出し及び書込みの両方のアクセスを可能にし、コンピ ュータシステムが第1の動作モードで動作していないときはレジスタへの読出し アクセスのみを可能にするよう構成されている請求項14記載のインタフェース 装置。 17.上記論理回路が、コンピュータシステムが第1の動作モードで動作してい るとき第1の型のポートとして上記レジスタへのアクセスを可能にし、コンピュ ータシステムが第1の動作モードで動作していないときは第2の型のポートとし てレジスタへのアクセスを可能にする請求項11記載のインタフェース装置。 18.システム管理モード(SMM)で動作可能なコンピュータシステムにおい て: コンピュータシステムがシステム管理モードで動作しているとき専用のSMM メモリアドレス空間に対してアクセス権を持つプロセッサと; そのプロセッサ接続されていて: 入出力(I/O)アドレス空間にマップされたレジスタ; そのレジスタを識別するアドレスデータを受け取るよう接続された入力と 、そのレジスタにセレクト信号を供給するよう接続された出力とを有するデコー ダ;及び コンピュータシステムがシステム管理モードで動作しているときそれを検 知するよう構成され、かつコンピュータシステムがシステム管理モードで動作し ているとき該プロセッサによる該レジスタへの第1の型のアクセスを可能にし、 コンピュータシステムがシステム管理モードで動作していないときは該プロセッ サによる該レジスタへの第2の型のアクセスを可能にするよう構成されている論 理回路; を有するインタフエース装置と; を具備したコンピュータシステム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/667,789 US5729760A (en) | 1996-06-21 | 1996-06-21 | System for providing first type access to register if processor in first mode and second type access to register if processor not in first mode |
US08/667,789 | 1996-06-21 | ||
PCT/US1997/008946 WO1997049041A1 (en) | 1996-06-21 | 1997-05-22 | System for controlling access to a register mapped to an i/o address space of a computer system |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2000513471A true JP2000513471A (ja) | 2000-10-10 |
JP2000513471A5 JP2000513471A5 (ja) | 2004-12-09 |
JP4234202B2 JP4234202B2 (ja) | 2009-03-04 |
Family
ID=24679650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50298598A Expired - Fee Related JP4234202B2 (ja) | 1996-06-21 | 1997-05-22 | コンピュータシステムのi/oアドレス空間にマップされたレジスタへのアクセスを制御するためのシステム |
Country Status (10)
Country | Link |
---|---|
US (1) | US5729760A (ja) |
EP (1) | EP0979460B1 (ja) |
JP (1) | JP4234202B2 (ja) |
KR (1) | KR100298620B1 (ja) |
CN (1) | CN1132107C (ja) |
AU (1) | AU3369497A (ja) |
BR (1) | BR9709876A (ja) |
DE (1) | DE69718679T2 (ja) |
TW (1) | TW393599B (ja) |
WO (1) | WO1997049041A1 (ja) |
Cited By (1)
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KR100298620B1 (ko) | 2001-09-06 |
BR9709876A (pt) | 1999-08-10 |
AU3369497A (en) | 1998-01-07 |
DE69718679D1 (de) | 2003-02-27 |
CN1228177A (zh) | 1999-09-08 |
TW393599B (en) | 2000-06-11 |
US5729760A (en) | 1998-03-17 |
EP0979460A1 (en) | 2000-02-16 |
WO1997049041A1 (en) | 1997-12-24 |
JP4234202B2 (ja) | 2009-03-04 |
DE69718679T2 (de) | 2003-06-12 |
EP0979460B1 (en) | 2003-01-22 |
EP0979460A4 (en) | 2000-03-15 |
CN1132107C (zh) | 2003-12-24 |
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