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><A
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><A
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NAME="EXEC-COMMAND">exec</H1
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NAME="EXEC-COMMAND">exec</H1
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><DIV
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><DIV
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CLASS="REFNAMEDIV"
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CLASS="REFNAMEDIV"
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><A
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><A
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NAME="AEN4570"
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NAME="AEN4570"
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></A
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></A
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><H2
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><H2
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>Name</H2
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>Name</H2
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>exec -- Execute a Linux kernel</DIV
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>exec -- Execute a Linux kernel</DIV
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><DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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CLASS="REFSYNOPSISDIV"
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><A
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><A
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NAME="AEN4573"><H2
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NAME="AEN4573"><H2
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>Synopsis</H2
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>Synopsis</H2
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><P
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><P
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><B
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><B
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CLASS="COMMAND"
|
CLASS="COMMAND"
|
>exec</B
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>exec</B
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> [-w <TT
|
> [-w <TT
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CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> timeout</I
|
> timeout</I
|
></TT
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></TT
|
>] [-r <TT
|
>] [-r <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> ramdisk_address</I
|
> ramdisk_address</I
|
></TT
|
></TT
|
>] [-s <TT
|
>] [-s <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> ramdisk_length</I
|
> ramdisk_length</I
|
></TT
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></TT
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>] [-b <TT
|
>] [-b <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> load_address</I
|
> load_address</I
|
></TT
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></TT
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>
|
>
|
{-l <TT
|
{-l <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> load_length</I
|
> load_length</I
|
></TT
|
></TT
|
>}
|
>}
|
] [-c <TT
|
] [-c <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> kernel_command_line</I
|
> kernel_command_line</I
|
></TT
|
></TT
|
>] [<TT
|
>] [<TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
> entry_point</I
|
> entry_point</I
|
></TT
|
></TT
|
>]</P
|
>]</P
|
></DIV
|
></DIV
|
><DIV
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><DIV
|
CLASS="REFSECT1"
|
CLASS="REFSECT1"
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><A
|
><A
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NAME="AEN4590"
|
NAME="AEN4590"
|
></A
|
></A
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><H2
|
><H2
|
>Arguments</H2
|
>Arguments</H2
|
><DIV
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><DIV
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CLASS="INFORMALTABLE"
|
CLASS="INFORMALTABLE"
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><A
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><A
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NAME="AEN4592"><P
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NAME="AEN4592"><P
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></P
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></P
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><TABLE
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><TABLE
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BORDER="1"
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BORDER="1"
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CLASS="CALSTABLE"
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CLASS="CALSTABLE"
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><THEAD
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><THEAD
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><TR
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><TR
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><TH
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><TH
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WIDTH="25%"
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WIDTH="25%"
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ALIGN="LEFT"
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ALIGN="LEFT"
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VALIGN="TOP"
|
VALIGN="TOP"
|
>Name</TH
|
>Name</TH
|
><TH
|
><TH
|
WIDTH="25%"
|
WIDTH="25%"
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ALIGN="LEFT"
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ALIGN="LEFT"
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VALIGN="TOP"
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VALIGN="TOP"
|
>Type</TH
|
>Type</TH
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><TH
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><TH
|
WIDTH="25%"
|
WIDTH="25%"
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ALIGN="LEFT"
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ALIGN="LEFT"
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VALIGN="TOP"
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VALIGN="TOP"
|
>Description</TH
|
>Description</TH
|
><TH
|
><TH
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
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VALIGN="TOP"
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VALIGN="TOP"
|
>Default</TH
|
>Default</TH
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></TR
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></TR
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></THEAD
|
></THEAD
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><TBODY
|
><TBODY
|
><TR
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><TR
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><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-w <TT
|
>-w <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>timeout</I
|
>timeout</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Time to wait before starting execution.</TD
|
>Time to wait before starting execution.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>0</TD
|
>0</TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-r <TT
|
>-r <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>ramdisk_address</I
|
>ramdisk_address</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Address in memory of "initrd"-style ramdisk - passed to Linux kernel.</TD
|
>Address in memory of "initrd"-style ramdisk - passed to Linux kernel.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><SPAN
|
><SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>None</I
|
>None</I
|
></SPAN
|
></SPAN
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-s <TT
|
>-s <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>ramdisk_length</I
|
>ramdisk_length</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Length of ramdisk image - passed to Linux kernel.</TD
|
>Length of ramdisk image - passed to Linux kernel.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><SPAN
|
><SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>None</I
|
>None</I
|
></SPAN
|
></SPAN
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-b <TT
|
>-b <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>load_address</I
|
>load_address</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Address in memory of the Linux kernel image.</TD
|
>Address in memory of the Linux kernel image.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Value set by <B
|
>Value set by <B
|
CLASS="COMMAND"
|
CLASS="COMMAND"
|
>load</B
|
>load</B
|
> or <B
|
> or <B
|
CLASS="COMMAND"
|
CLASS="COMMAND"
|
>fis load</B
|
>fis load</B
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-l <TT
|
>-l <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>load_length</I
|
>load_length</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Length of Linux kernel image.</TD
|
>Length of Linux kernel image.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><SPAN
|
><SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>none</I
|
>none</I
|
></SPAN
|
></SPAN
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>-c <TT
|
>-c <TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>kernel_command_line</I
|
>kernel_command_line</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>String</TD
|
>String</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Command line to pass to the Linux kernel.</TD
|
>Command line to pass to the Linux kernel.</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><SPAN
|
><SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>None</I
|
>None</I
|
></SPAN
|
></SPAN
|
></TD
|
></TD
|
></TR
|
></TR
|
><TR
|
><TR
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
><TT
|
><TT
|
CLASS="REPLACEABLE"
|
CLASS="REPLACEABLE"
|
><I
|
><I
|
>entry_address</I
|
>entry_address</I
|
></TT
|
></TT
|
></TD
|
></TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Number</TD
|
>Number</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Starting address for Linux kernel execution</TD
|
>Starting address for Linux kernel execution</TD
|
><TD
|
><TD
|
WIDTH="25%"
|
WIDTH="25%"
|
ALIGN="LEFT"
|
ALIGN="LEFT"
|
VALIGN="TOP"
|
VALIGN="TOP"
|
>Implied by architecture</TD
|
>Implied by architecture</TD
|
></TR
|
></TR
|
></TBODY
|
></TBODY
|
></TABLE
|
></TABLE
|
><P
|
><P
|
></P
|
></P
|
></DIV
|
></DIV
|
></DIV
|
></DIV
|
><DIV
|
><DIV
|
CLASS="REFSECT1"
|
CLASS="REFSECT1"
|
><A
|
><A
|
NAME="AEN4653"
|
NAME="AEN4653"
|
></A
|
></A
|
><H2
|
><H2
|
>Description</H2
|
>Description</H2
|
><P
|
><P
|
>The <B
|
>The <B
|
CLASS="COMMAND"
|
CLASS="COMMAND"
|
>exec</B
|
>exec</B
|
> command is used to execute a non-eCos application, typically a
|
> command is used to execute a non-eCos application, typically a
|
Linux kernel. Additional information may be passed to the kernel at startup
|
Linux kernel. Additional information may be passed to the kernel at startup
|
time. This command is quite special (and unique from the <B
|
time. This command is quite special (and unique from the <B
|
CLASS="COMMAND"
|
CLASS="COMMAND"
|
>go</B
|
>go</B
|
> command) in
|
> command) in
|
that the program being executed may expect certain environmental setups, for
|
that the program being executed may expect certain environmental setups, for
|
example that the MMU is turned off, etc. </P
|
example that the MMU is turned off, etc. </P
|
><P
|
><P
|
>The Linux kernel expects to have been loaded to a particular memory
|
>The Linux kernel expects to have been loaded to a particular memory
|
location which is architecture dependent(0xC0008000 in the case of the SA1110).
|
location which is architecture dependent(0xC0008000 in the case of the SA1110).
|
Since this memory is used
|
Since this memory is used
|
by RedBoot internally, it is not possible to load the kernel to that location
|
by RedBoot internally, it is not possible to load the kernel to that location
|
directly. Thus the requirement for the "-b" option which tells the command
|
directly. Thus the requirement for the "-b" option which tells the command
|
where the kernel has been loaded. When the <B
|
where the kernel has been loaded. When the <B
|
CLASS="COMMAND"
|
CLASS="COMMAND"
|
>exec</B
|
>exec</B
|
> command runs, the image will
|
> command runs, the image will
|
be relocated to the appropriate location before being started. The "-r" and
|
be relocated to the appropriate location before being started. The "-r" and
|
"-s" options are used to pass information to the kernel about where a statically
|
"-s" options are used to pass information to the kernel about where a statically
|
loaded ramdisk (initrd) is located.</P
|
loaded ramdisk (initrd) is located.</P
|
><P
|
><P
|
>The "-c" option can be used to pass textual "command line" information
|
>The "-c" option can be used to pass textual "command line" information
|
to the kernel. If the command line data contains any punctuation (spaces,
|
to the kernel. If the command line data contains any punctuation (spaces,
|
etc), then it must be quoted using the double-quote character '"'. If the
|
etc), then it must be quoted using the double-quote character '"'. If the
|
quote character is required, it should be written as '\"'.
|
quote character is required, it should be written as '\"'.
|
</P
|
</P
|
></DIV
|
></DIV
|
><DIV
|
><DIV
|
CLASS="REFSECT1"
|
CLASS="REFSECT1"
|
><A
|
><A
|
NAME="AEN4661"
|
NAME="AEN4661"
|
></A
|
></A
|
><H2
|
><H2
|
>Examples</H2
|
>Examples</H2
|
><P
|
><P
|
>Execute a Linux kernel, passing a command line, which needs relocation.
|
>Execute a Linux kernel, passing a command line, which needs relocation.
|
The result from RedBoot is normally quiet, with the target platform being
|
The result from RedBoot is normally quiet, with the target platform being
|
passed over to Linux immediately.
|
passed over to Linux immediately.
|
<TABLE
|
<TABLE
|
BORDER="5"
|
BORDER="5"
|
BGCOLOR="#E0E0F0"
|
BGCOLOR="#E0E0F0"
|
WIDTH="70%"
|
WIDTH="70%"
|
><TR
|
><TR
|
><TD
|
><TD
|
><PRE
|
><PRE
|
CLASS="SCREEN"
|
CLASS="SCREEN"
|
>RedBoot> <TT
|
>RedBoot> <TT
|
CLASS="USERINPUT"
|
CLASS="USERINPUT"
|
><B
|
><B
|
>exec -b 0x100000 -l 0x80000 -c "noinitrd root=/dev/mtdblock3 console=ttySA0"</B
|
>exec -b 0x100000 -l 0x80000 -c "noinitrd root=/dev/mtdblock3 console=ttySA0"</B
|
></TT
|
></TT
|
></PRE
|
></PRE
|
></TD
|
></TD
|
></TR
|
></TR
|
></TABLE
|
></TABLE
|
>
|
>
|
</P
|
</P
|
><P
|
><P
|
>Execute a Linux kernel, default entry address and no relocation required, with a timeout.
|
>Execute a Linux kernel, default entry address and no relocation required, with a timeout.
|
The <SPAN
|
The <SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
> emphasized lines</I
|
> emphasized lines</I
|
></SPAN
|
></SPAN
|
> are output from the loaded kernel.
|
> are output from the loaded kernel.
|
<TABLE
|
<TABLE
|
BORDER="5"
|
BORDER="5"
|
BGCOLOR="#E0E0F0"
|
BGCOLOR="#E0E0F0"
|
WIDTH="70%"
|
WIDTH="70%"
|
><TR
|
><TR
|
><TD
|
><TD
|
><PRE
|
><PRE
|
CLASS="SCREEN"
|
CLASS="SCREEN"
|
>
|
>
|
RedBoot> exec <TT
|
RedBoot> exec <TT
|
CLASS="USERINPUT"
|
CLASS="USERINPUT"
|
><B
|
><B
|
>-c "console=ttyS0,38400 ip=dhcp nfsroot=/export/elfs-sh" -w 5</B
|
>-c "console=ttyS0,38400 ip=dhcp nfsroot=/export/elfs-sh" -w 5</B
|
></TT
|
></TT
|
>
|
>
|
Now booting linux kernel:
|
Now booting linux kernel:
|
Base address 0x8c001000 Entry 0x8c210000
|
Base address 0x8c001000 Entry 0x8c210000
|
Cmdline : console=ttyS0,38400 ip=dhcp nfsroot=/export/elfs-sh
|
Cmdline : console=ttyS0,38400 ip=dhcp nfsroot=/export/elfs-sh
|
About to start execution at 0x8x210000 - abort with ^C within 5 seconds
|
About to start execution at 0x8x210000 - abort with ^C within 5 seconds
|
<SPAN
|
<SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
|
><I
|
><I
|
CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
|
>Linux version 2.4.10-pre6 (...) (gcc version 3.1-stdsh-010931) #3 Thu Sep 27 11:04:23 BST 2001</I
|
>Linux version 2.4.10-pre6 (...) (gcc version 3.1-stdsh-010931) #3 Thu Sep 27 11:04:23 BST 2001</I
|
></SPAN
|
></SPAN
|
></PRE
|
></PRE
|
></TD
|
></TD
|
></TR
|
></TR
|
></TABLE
|
></TABLE
|
>
|
>
|
</P
|
</P
|
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|
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|
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|
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