发明授权
- 专利标题: Software management methods for automotive computing devices
- 专利标题(中): 汽车计算设备的软件管理方法
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申请号: US10856010申请日: 2004-05-27
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公开(公告)号: US07254083B2公开(公告)日: 2007-08-07
- 发明人: Richard D. Beckert , Sharon Drasnin , Ronald Otto Radko
- 申请人: Richard D. Beckert , Sharon Drasnin , Ronald Otto Radko
- 申请人地址: US WA Redmond
- 专利权人: Microsoft Corporation
- 当前专利权人: Microsoft Corporation
- 当前专利权人地址: US WA Redmond
- 主分类号: G06F12/16
- IPC分类号: G06F12/16 ; G06F12/00
摘要:
Methods and systems for operating automotive computing devices are described. In one embodiment, a small amount of static RAM (SRAM) is incorporated into an automotive computing device. The SRAM is battery-backed to provide a non-volatile memory space in which critical data, e.g. the object store, can be maintained in the event of a power loss. Circuitry is provided to ensure that the SRAM receives back up power from the battery at appropriate times. Software manages the SRAM and the other storage assembly components and makes use of virtual paging or virtual addressing techniques to keep track of where various pages, including object store pages, are stored in the system. The software knows where all of the object store pages are located so that in the event of a power loss, the page locations are known and hence the pages can be used when power is restored. The SRAM is advantageously used to maintain so-called “dirty pages” or pages that have been written to so that these pages are not lost in the event of a power interruption. Additionally, the software can also provide an orderly means by which pages in the SRAM can be written out to flash memory thereby avoiding unnecessary flash write operations which, in turn, increases the lifetime of the flash memory.
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