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    • 1. 发明授权
    • Software management systems and methods for automotive computing devices
    • 用于汽车计算设备的软件管理系统和方法
    • US07296258B2
    • 2007-11-13
    • US10856083
    • 2004-05-27
    • Richard D. BeckertSharon DrasninRonald Otto Radko
    • Richard D. BeckertSharon DrasninRonald Otto Radko
    • G06F9/44G06F9/45
    • G06F11/1441G06F11/2015G06F12/08G06F12/1009G06F12/1027G06F12/122G06F2212/2022
    • 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.
    • 描述了用于操作汽车计算设备的方法和系统。 在一个实施例中,少量静态RAM(SRAM)被并入到汽车计算设备中。 SRAM是电池供电的,以提供非易失性存储器空间,其中关键数据,例如, 对象存储,可以在发生电力损失的情况下维护。 提供电路以确保SRAM在适当的时间从电池接收电力。 软件管理SRAM和其他存储组件组件,并利用虚拟寻呼或虚拟寻址技术跟踪各种页面(包括对象存储页面)存储在系统中的位置。 软件知道所有对象存储页面所在的位置,以便在掉电的情况下,页面位置是已知的,因此在恢复电源时可以使用页面。 SRAM有利地用于维护已经被写入的所谓的“脏页面”或页面,使得在电源中断的情况下这些页面不会丢失。 此外,该软件还可以提供一种有序的手段,通过该方式可以将SRAM中的页面写入闪存,从而避免不必要的闪存写入操作,这又会增加闪存的使用寿命。