增阅笔记

VxWorks bootloader

 
  • 2017年 12月11日

VxWorks 操作系统自带 BootLoader， 类似于 u-boot，启动过程功能：

  1. 初始化启动需要的外设
  2. 设置好系统核心启动环境
  3. 提供一个用户设置界面

其中用户界面同样跟 u-boot 类似，使用 command 命令来实现对应的相关操作。

启动界面

VxWorks 的 bootrom 启动后界面如下：

boot device                       : ln
unit number                       : 0
processor number                  : 0
host name                         : mars
file name                         : c:\temp\vxWorks1
inet on ethernet (e)              : 90.0.0.50:ffffff00
inet on backplane (b)             :
host inet (h)                     : 90.0.0.1
gateway inet (g)                  :
user (u)                          : fred
ftp password (pw)(blank=use rsh)  :secret
flags (f)                         : 0x0
target name (tn)                  : phobos
startup script (s)                :
other (o)                         :

boot device

内置的启动设备器件，由于启动设备一般都是受限的，所以能够选择的启动设备也是有限的，可以通过 h 或者 ？ 命令查看当前支持的可启动设备

unit number

当前的启动设备编号，从 0 开始

processor number

backplane 多 target 系统上的核心号。一般都是 0

host name

主机名

file name

主机上的启动文件名。 160-byte 限制

inet on ethernet (e)

IP 协议地址，以及 mask 的十六进制格式

flags

0x01 = Do not enable the system controller, even if the processor number is 0. (This option is board specific; refer to your target documentation) 0x02 = Load all VxWorks symbolsa , instead of just globals. 0x04 = Do not auto-boot. 0x08 = Auto-boot fast (short countdown). 0x20 = Disable login security. 0x40 = Use BOOTP to get boot parameters. 0x80 = Use TFTP to get boot image. 0x100 = Use proxy ARP. 0x200 = Use WDB agent. 0x400 = Set system to debug mode for the error detection and reporting facility (depending on whether you are working on kernel modules or user applications).

命令详解

Command Description
h Help command—print a list of available boot commands.
? Same as h.
@ Boot (load and execute file) using the current boot parameters.
p Print the current boot parameter values.
c Change the boot parameter values.
l Load the file using current boot parameters, but without executing.
g adrs Go to (execute at) hex address adrs.
d adrs[, n] Display n words of memory starting at hex address adrs. If n is omitted, the default is 64.
m adrs Modify memory at location adrs (hex). The system prompts for modifications to memory, starting at the specified address. It prints each address, and the current 16-bit value at that address, in turn. You can respond in one of several ways:
ENTER: Do not change that address, but continue prompting at the next address.
number: Set the 16-bit contents to number.
.(dot): Do not change that address, and quit.
f adrs,nbytes,value Fill nbytes of memory, starting at adrs with value.
t adrs1,adrs2,nbytes Copy nbytes of memory, starting at adrs1, to adrs2.
s [ 0 | 1 ] Turn the CPU system controller ON (1) or OFF (0) (only on boards where the system controller can be enabled by software).
e Display a synopsis of the last occurring VxWorks exception.
v Display BSP and boot ROM version.
N Set Ethernet address.
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