OEMmapMemAddr

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 楼主| sxggj 发表于 2008-10-14 13:55 | 显示全部楼层 |阅读模式
This&nbsp;function&nbsp;is&nbsp;used&nbsp;to&nbsp;handle&nbsp;downloads&nbsp;that&nbsp;are&nbsp;destined&nbsp;for&nbsp;flash.&nbsp;OEMmapMemAddr&nbsp;remaps&nbsp;a&nbsp;flash-resident&nbsp;address&nbsp;to&nbsp;a&nbsp;unique&nbsp;RAM-based&nbsp;address&nbsp;so&nbsp;that&nbsp;flash&nbsp;memory&nbsp;OS&nbsp;images&nbsp;can&nbsp;be&nbsp;temporarily&nbsp;cached&nbsp;in&nbsp;RAM&nbsp;while&nbsp;the&nbsp;download&nbsp;occurs.&nbsp;This&nbsp;provides&nbsp;enough&nbsp;time&nbsp;to&nbsp;handle&nbsp;the&nbsp;flash&nbsp;memory&nbsp;update&nbsp;while&nbsp;not&nbsp;stalling&nbsp;the&nbsp;download&nbsp;process&nbsp;because&nbsp;the&nbsp;flash&nbsp;memory&nbsp;operation&nbsp;typically&nbsp;takes&nbsp;more&nbsp;time&nbsp;than&nbsp;the&nbsp;download&nbsp;process<br /><br />这段话中的<br /><br />remaps&nbsp;a&nbsp;flash-resident&nbsp;address&nbsp;to&nbsp;a&nbsp;unique&nbsp;RAM-based&nbsp;address&nbsp;so&nbsp;that&nbsp;flash&nbsp;memory&nbsp;OS&nbsp;images&nbsp;can&nbsp;be&nbsp;temporarily&nbsp;cached&nbsp;in&nbsp;RAM&nbsp;while&nbsp;the&nbsp;download&nbsp;occurs<br /><br />如何翻译
ejack 发表于 2008-10-18 10:24 | 显示全部楼层

如下

该功能/函数可用于处理对Flash的下载。OEMmapMemAddr可将寻址空间中Flash区域的地址映射到另一RAM地址中,这样在下载的时候,实际上是将OS镜像临时缓冲到了RAM里。一般Flash存储器的操作(扇区擦除、写入等)时间总是长于单纯的下载过程,所以这种处理方式既提供了充足的时间进行Flash程序升级,同时也不会影响下载流程的正常进行。
宇宙飞船 发表于 2008-11-23 00:30 | 显示全部楼层

给参考一下:

remaps&nbsp;a&nbsp;flash-resident&nbsp;address&nbsp;to&nbsp;a&nbsp;unique&nbsp;RAM-based&nbsp;address&nbsp;so&nbsp;that&nbsp;flash&nbsp;memory&nbsp;OS&nbsp;images&nbsp;can&nbsp;be&nbsp;temporarily&nbsp;cached&nbsp;in&nbsp;RAM&nbsp;while&nbsp;the&nbsp;download&nbsp;occurs<br />//------------------------------------------------------<br />remaps&nbsp;a&nbsp;flash-resident&nbsp;address&nbsp;to&nbsp;a&nbsp;unique&nbsp;RAM-based&nbsp;address<br />重新映射常驻flash闪存(flash-resident)地址到一个唯一的&nbsp;RAM基址地址(RAM-based)中去。<br />so&nbsp;that&nbsp;flash&nbsp;memory&nbsp;OS&nbsp;images&nbsp;can&nbsp;be&nbsp;temporarily&nbsp;cached&nbsp;in&nbsp;RAM&nbsp;while&nbsp;the&nbsp;download&nbsp;occurs<br />所以当出现下载时,flash闪存的操作系统内核映像(OS&nbsp;images)能够临时地放入RAM中。
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