INFORMATION PROCESSING APPARATUS, BOOT METHOD, AND BOOT PROGRAM

To reduce the number of PCI devices to which an MMIO-L is assigned in a legacy boot and to suppress the occurrence of MMIO-L shortage.SOLUTION: A pre-processing unit 47 specifies a root port to which an MMIO-L is to be allocated, and performs a setting to allocate the MMIO-L to a PCI device under th...

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1. Verfasser: TACHIBANA MASAZUMI
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Sprache:eng ; jpn
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Zusammenfassung:To reduce the number of PCI devices to which an MMIO-L is assigned in a legacy boot and to suppress the occurrence of MMIO-L shortage.SOLUTION: A pre-processing unit 47 specifies a root port to which an MMIO-L is to be allocated, and performs a setting to allocate the MMIO-L to a PCI device under the control of the specified root port. A PCI initialization unit 43 then allocates the MMIO-L to the PCI device under the control of the root port specified by the pre-processing unit 47, and allocates an MMIO-H to a PCI device under the control of another root port. An intermediate processing unit 48 then determines whether or not the MMIO-L is insufficient. If the MMIO-L is not insufficient, the intermediate processing unit requests a boot processing unit 45 to perform boot processing. The boot processing unit 45 then performs an OS boot.SELECTED DRAWING: Figure 5 【課題】レガシーブートにおいてMMIO−Lが割り当てられるPCIデバイスの数を減らし、MMIO−L不足の発生を抑えること。【解決手段】前処理部47が、MMIO−Lを割り当てるルートポートを特定し、特定したルートポートの配下のPCIデバイスにMMIO−Lを割り当てる設定を行う。そして、PCI初期化部43が、前処理部47により特定されたルートポートの配下のPCIデバイスへMMIO−Lを割り当て、他のルートポートの配下のPCIデバイスへMMIO−Hを割り当てる。そして、中間処理部48が、MMIO−L不足か否かを判定し、MMIO−L不足でない場合には、ブート処理部45にブート処理を依頼する。そして、ブート処理部45がOSブートを行う。【選択図】図5