| Luka Perkov | d131ad6 | 2012-05-27 11:44:51 +0000 | [diff] [blame] | 1 | .TH KWBOOT 1 "2012-05-19" |
| 2 | |
| 3 | .SH NAME |
| 4 | kwboot \- Boot Marvell Kirkwood SoCs over a serial link. |
| 5 | .SH SYNOPSIS |
| 6 | .B kwboot |
| 7 | .RB [ "-b \fIimage\fP" ] |
| 8 | .RB [ "-p" ] |
| 9 | .RB [ "-t" ] |
| 10 | .RB [ "-B \fIbaudrate\fP" ] |
| 11 | .RB \fITTY\fP |
| 12 | .SH "DESCRIPTION" |
| 13 | |
| 14 | The \fBmkimage\fP program boots boards based on Marvell's Kirkwood |
| 15 | platform over their integrated UART. Boot image files will typically |
| 16 | contain a second stage boot loader, such as U-Boot. The image file |
| 17 | must conform to Marvell's BootROM firmware image format |
| 18 | (\fIkwbimage\fP), created using a tool such as \fBmkimage\fP. |
| 19 | |
| 20 | Following power-up or a system reset, system BootROM code polls the |
| 21 | UART for a brief period of time, sensing a handshake message which |
| 22 | initiates an image upload. This program sends this boot message until |
| 23 | it receives a positive acknowledgement. The image is transfered using |
| 24 | Xmodem. |
| 25 | |
| 26 | Additionally, this program implements a minimal terminal mode, which |
| 27 | can be used either standalone, or entered immediately following boot |
| 28 | image transfer completion. This is often useful to catch early boot |
| 29 | messages, or to manually interrupt a default boot procedure performed |
| 30 | by the second-stage loader. |
| 31 | |
| 32 | .SH "OPTIONS" |
| 33 | |
| 34 | .TP |
| 35 | .BI "\-b \fIimage\fP" |
| 36 | Handshake; then upload file \fIimage\fP over \fITTY\fP. |
| 37 | |
| 38 | Note that for the encapsulated boot code to be executed, \fIimage\fP |
| 39 | must be of type "UART boot" (0x69). Boot images of different types, |
| 40 | such as backup images of vendor firmware downloaded from flash memory |
| 41 | (type 0x8B), will not work (or not as expected). See \fB-p\fP for a |
| 42 | workaround. |
| 43 | |
| 44 | This mode writes handshake status and upload progress indication to |
| 45 | stdout. |
| 46 | |
| 47 | .TP |
| 48 | .BI "\-p" |
| 49 | In combination with \fB-b\fP, patches the header in \fIimage\fP prior |
| 50 | to upload, to "UART boot" type. |
| 51 | |
| 52 | This option attempts on-the-fly conversion of some none-UART image |
| 53 | types, such as images which were originally formatted to be stored in |
| 54 | flash memory. |
| 55 | |
| 56 | Conversion is performed in memory. The contents of \fIimage\fP will |
| 57 | not be altered. |
| 58 | |
| 59 | .TP |
| 60 | .BI "\-t" |
| 61 | Run a terminal program, connecting standard input and output to |
| 62 | .RB \fITTY\fP. |
| 63 | |
| 64 | If used in combination with \fB-b\fP, terminal mode is entered |
| 65 | immediately following a successful image upload. |
| 66 | |
| 67 | If standard I/O streams connect to a console, this mode will terminate |
| 68 | after receiving 'ctrl-\\' followed by 'c' from console input. |
| 69 | |
| 70 | .TP |
| 71 | .BI "\-B \fIbaudrate\fP" |
| 72 | Adjust the baud rate on \fITTY\fP. Default rate is 115200. |
| 73 | |
| 74 | .SH "SEE ALSO" |
| 75 | .PP |
| 76 | \fBmkimage\fP(1) |
| 77 | |
| 78 | .SH "AUTHORS" |
| 79 | |
| 80 | Daniel Stodden <daniel.stodden@gmail.com> |
| 81 | .br |
| 82 | Luka Perkov <uboot@lukaperkov.net> |
| 83 | .br |
| 84 | David Purdy <david.c.purdy@gmail.com> |