KJ3244X1-BA1模块备件

KJ3244X1-BA1

❏ 在活动闪存库中搜索有效的
张贴图像。如果找到，则执行POST图像。一旦
完成后，返回后映像并继续启动。
❏ 在活动闪存库中搜索有效的
用户启动映像。如果找到，则执行用户启动映像。A.
预计不会返回启动块代码。
❏ 如果未找到有效的用户启动映像，请搜索活动闪存
可能以交互方式存储有效的MCG引导映像；
预计将升级MCG固件。如果找到，图像为
执行。预计不会返回引导块代码。
❏ 如果否，则在引导块中执行固件的恢复映像
找到有效的用户或MCG图像
在启动过程中，可以通过设置保险柜或
启动跳线/开关，或向控制台串行端口发送<ESC>命令
在电路板复位的五秒钟内。在交互模式下，用户
具有显示有效启动映像所在位置的选项
已发现，指定要执行的已发现映像，或指定
活动闪存组的启动块中的恢复映像将：
执行。
启动映像的固件扫描
通过检查定义集的每个1MB边界来执行扫描
在标识图像为开机自检（POST）的标志中，
用户或MCG。MOTLoad是MCG图像。POST是用户开发的
通电自检，执行一组诊断，然后返回
到引导加载程序映像。用户将是引导映像，如VxWorks
bootrom，它将执行板初始化。可引导的VxWorks
内核也将是用户映像。启动映像不限于：
大小为MB或更小；但是，它们必须从1MB边界开始
在扫描闪存库的8MB内。闪存库结构为：
如下所示：

KJ3244X1-BA1

KJ3244X1-BA1

❏ Search the active flash bank, possibly interactively, for a valid POST image. If found, the POST images executes. Once completed, the POST image returns and startup continues. ❏ Search the active flash bank, possibly interactively, for a valid USER boot image. If found, the USER boot image executes. A return to the boot block code is not anticipated. ❏ If a valid USER boot image is not found, search the active flash bank, possibly interactively, for a valid MCG boot image; anticipated to be upgrade of MCG firmware. If found, the image is executed. A return to the boot block code is not anticipated. ❏ Execute the recovery image of the firmware in the boot block if no valid USER or MCG image is found During startup, interactive mode may be entered by either setting the Safe Start jumper/switch or by sending an to the console serial port within five seconds of the board reset. During interactive mode, the user has the option to display locations at which valid boot images were discovered, specify which discovered image is to be executed, or specify that the recovery image in the boot block of the active Flash bank is to be executed. Firmware Scan for Boot Image The scan is performed by examining each 1MB boundary for a defined set of flags that identify the image as being Power On Self Test (POST), USER, or MCG. MOTLoad is an MCG image. POST is a user-developed Power On Self Test that would perform a set of diagnostics and then return to the bootloader image. User would be a boot image, such as the VxWorks bootrom, which would perform board initialization. A bootable VxWorks kernel would also be a USER image. Boot images are not restricted to being MB or less in size; however, they must begin on a 1MB boundary within the 8MB of the scanned flash bank. The Flash Bank Structure is shown below: