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>SuperH/SH4(SH7751) Hitachi Solution Engine 7751</TITLE
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>eCos Reference Manual</TH
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><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="SE7751">SuperH/SH4(SH7751) Hitachi Solution Engine 7751</H1
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7589">Overview</H2
><P
>RedBoot uses
the COM1 serial port. The default serial port settings are 38400,8,N,1.
Ethernet is also supported using the 10-base T connector. Management
of onboard flash is also supported.</P
><P
>The following RedBoot configurations are supported:
<DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN7599"><P
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="TOP"
>Configuration</TH
><TH
ALIGN="LEFT"
VALIGN="TOP"
>Mode</TH
><TH
ALIGN="LEFT"
VALIGN="TOP"
>Description</TH
><TH
ALIGN="LEFT"
VALIGN="TOP"
>File</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>ROM</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>[ROM]</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RedBoot running from the board's flash boot
sector.</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>redboot_ROM.ecm</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RAM</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>[RAM]</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>RedBoot running from RAM with RedBoot in the
flash boot sector.</TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>redboot_RAM.ecm</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7618">Initial Installation Method</H2
><P
>The Solution Engine ships with the Hitachi boot monitor in EPROM
which allows for initial programming of RedBoot:</P
><P
></P
><OL
TYPE="1"
><LI
><P
>Set switches SW5-3 and SW5-4 to ON [boot from EPROM]</P
></LI
><LI
><P
>Connect a serial cable to COM1 and power up the board.</P
></LI
><LI
><P
>After the boot monitor banner, invoke the flash
download/program command:<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>Ready ><TT
CLASS="USERINPUT"
><B
>fl</B
></TT
></PRE
></TD
></TR
></TABLE
></P
></LI
><LI
><P
>The monitor should now ask for input:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>Flash ROM data copy to RAM
Please Send A S-format Record</PRE
></TD
></TR
></TABLE
>At this point copy the
RedBoot ROM SREC file to the serial port:<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>$ <TT
CLASS="USERINPUT"
><B
>cat redboot_ROM.eprom.srec > /dev/ttyS0</B
></TT
></PRE
></TD
></TR
></TABLE
>
Eventually you
should see something like<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>Start Addrs = A1000000
End Addrs = A1xxxxxx
Transfer complete</PRE
></TD
></TR
></TABLE
> from the monitor.</P
></LI
><LI
><P
>Set switch SW5-3 to OFF [boot from flash] and reboot the board. You
should now see the RedBoot banner.</P
></LI
></OL
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7638">Special RedBoot Commands</H2
><P
>The <B
CLASS="COMMAND"
>exec</B
> command which allows the loading
and execution of Linux kernels
is supported for this board (see <A
HREF="executing-programs.html"
>the Section called <I
>Executing Programs from RedBoot</I
> in Chapter 2</A
>). The <B
CLASS="COMMAND"
>exec</B
> parameters used for the SE7751 are:</P
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>-b <TT
CLASS="REPLACEABLE"
><I
><addr></I
></TT
></DT
><DD
><P
>Parameter block address. This is normally the first
page of the kernel image and defaults to 0x8c101000</P
></DD
><DT
>-i <TT
CLASS="REPLACEABLE"
><I
><addr></I
></TT
></DT
><DD
><P
>Start address of initrd
image</P
></DD
><DT
>-j <TT
CLASS="REPLACEABLE"
><I
><size></I
></TT
></DT
><DD
><P
>Size of initrd image</P
></DD
><DT
>-c <TT
CLASS="REPLACEABLE"
><I
>"args"</I
></TT
></DT
><DD
><P
>Kernel arguments string</P
></DD
><DT
>-m <TT
CLASS="REPLACEABLE"
><I
><flags></I
></TT
></DT
><DD
><P
>Mount rdonly flags. If set to a non-zero value the
root partition will be mounted read-only.</P
></DD
><DT
>-f <TT
CLASS="REPLACEABLE"
><I
><flags></I
></TT
></DT
><DD
><P
>RAM disk flags. Should normally be 0x4000</P
></DD
><DT
>-r <TT
CLASS="REPLACEABLE"
><I
><device number></I
></TT
></DT
><DD
><P
>Root device specification. /dev/ram is 0x0101</P
></DD
><DT
>-l <TT
CLASS="REPLACEABLE"
><I
><type></I
></TT
></DT
><DD
><P
>Loader type</P
></DD
></DL
></DIV
><P
>Finally the kernel entry address can be specified as an optional
argument. The default is 0x8c102000</P
><P
>On the SE7751, Linux expects to be loaded at address 0x8c101000 with
the entry point at 0x8c102000. This is configurable in the kernel
using the CONFIG_MEMORY_START option.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7687">Memory Maps</H2
><P
>RedBoot sets up the following memory map on the SE7751 board.<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>Physical Address Range Description
----------------------- -----------
0x80000000 - 0x803fffff Flash (MBM29LV160)
0x81000000 - 0x813fffff EPROM (M27C800)
0x8c000000 - 0x8fffffff SDRAM
0xb8000000 - 0xb8ffffff PCMCIA (MaruBun)
0xb9000000 - 0xb9ffffff Switches
0xba000000 - 0xbaffffff LEDs
0xbd000000 - 0xbdffffff PCI MEM space
0xbe200000 - 0xbe23ffff PCI Ctrl space
0xbe240000 - 0xbe27ffff PCI IO space</PRE
></TD
></TR
></TABLE
></P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7691">Ethernet Driver</H2
><P
>The ethernet driver uses a hardwired ESA which can, at present,
only be changed in CDL.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7694">Rebuilding RedBoot</H2
><P
>These shell variables provide the platform-specific information
needed for building RedBoot according to the procedure described in
<A
HREF="rebuilding-redboot.html"
>Chapter 3</A
>:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>export TARGET=se7751
export ARCH_DIR=sh
export PLATFORM_DIR=se7751</PRE
></TD
></TR
></TABLE
></P
><P
>The names of configuration files are listed above with the
description of the associated modes.</P
></DIV
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