.TH KWBOOT 1 "2012-05-19"
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.SH NAME
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kwboot \- Boot Marvell Kirkwood SoCs over a serial link.
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.SH SYNOPSIS
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.B kwboot
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.RB [ "-b \fIimage\fP" ]
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.RB [ "-p" ]
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.RB [ "-t" ]
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.RB [ "-B \fIbaudrate\fP" ]
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.RB \fITTY\fP
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.SH "DESCRIPTION"
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The \fBmkimage\fP program boots boards based on Marvell's Kirkwood
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platform over their integrated UART. Boot image files will typically
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contain a second stage boot loader, such as U-Boot. The image file
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must conform to Marvell's BootROM firmware image format
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(\fIkwbimage\fP), created using a tool such as \fBmkimage\fP.
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Following power-up or a system reset, system BootROM code polls the
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UART for a brief period of time, sensing a handshake message which
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initiates an image upload. This program sends this boot message until
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it receives a positive acknowledgement. The image is transferred using
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Xmodem.
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Additionally, this program implements a minimal terminal mode, which
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can be used either standalone, or entered immediately following boot
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image transfer completion. This is often useful to catch early boot
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messages, or to manually interrupt a default boot procedure performed
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by the second-stage loader.
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.SH "OPTIONS"
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.TP
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.BI "\-b \fIimage\fP"
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Handshake; then upload file \fIimage\fP over \fITTY\fP.
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Note that for the encapsulated boot code to be executed, \fIimage\fP
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must be of type "UART boot" (0x69). Boot images of different types,
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such as backup images of vendor firmware downloaded from flash memory
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(type 0x8B), will not work (or not as expected). See \fB-p\fP for a
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workaround.
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This mode writes handshake status and upload progress indication to
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stdout.
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.TP
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.BI "\-p"
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In combination with \fB-b\fP, patches the header in \fIimage\fP prior
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to upload, to "UART boot" type.
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This option attempts on-the-fly conversion of some none-UART image
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types, such as images which were originally formatted to be stored in
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flash memory.
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Conversion is performed in memory. The contents of \fIimage\fP will
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not be altered.
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.TP
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.BI "\-t"
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Run a terminal program, connecting standard input and output to
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.RB \fITTY\fP.
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If used in combination with \fB-b\fP, terminal mode is entered
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immediately following a successful image upload.
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If standard I/O streams connect to a console, this mode will terminate
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after receiving 'ctrl-\\' followed by 'c' from console input.
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.TP
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.BI "\-B \fIbaudrate\fP"
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Adjust the baud rate on \fITTY\fP. Default rate is 115200.
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.SH "SEE ALSO"
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.PP
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\fBmkimage\fP(1)
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.SH "AUTHORS"
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Daniel Stodden <daniel.stodden@gmail.com>
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.br
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Luka Perkov <luka@openwrt.org>
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.br
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David Purdy <david.c.purdy@gmail.com>
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