Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / xes / xpedite1000 / README

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+                          XES XPedite1000 Board
+
+                   Last Update: December 29, 2003
+=======================================================================
+
+This file contains some handy info regarding U-Boot and the XES
+XPedite1000 PPC440GX PrPMC board. See the README.ppc440 for additional
+information.
+
+
+SWITCH SETTINGS & JUMPERS
+==========================
+
+Jumpers selected for AMD29LV040B flash part as the boot flash.
+
+
+I2C Strap EEPROM & Environment Settings
+=======================================
+
+The XPedite1000 uses a single I2C eeprom for the 440 strappings and for
+the environment variables.  The first page (256 bytes) contains the
+strappings and the 2 EMAC HW Ethernet addresses.  Be careful not to
+change the 1st page of the EEPROM!  Unpopulated jumper J560 can get you
+out of trouble as it disables the strapping read from EEPROM.
+
+I2C probe
+=====================
+
+The i2c utilities work and have been tested on Rev B. of the 440GX. See
+README.ebony for more information about i2c probing with the 440.
+
+
+GETTING OUT OF I2C TROUBLE
+===========================
+
+(Direct quote from README.ebony)
+If you're like me ... you may have screwed up your bootstrap serial
+eeprom ... or worse, your SPD eeprom when experimenting with the
+i2c commands. If so, here are some ideas on how to get out of
+trouble:
+
+Serial bootstrap eeprom corruption:
+-----------------------------------
+Power down the board and set the following straps:
+
+J560 - closed
+
+This will select the default sys0 and sys1 settings (the serial
+eeproms are not used). Then power up the board and fix the serial
+eeprom using the 'i2c mm' command. Here are the values I currently
+use:
+
+=> i2c md 50 0 10
+
+0000: 85 7d 42 06 07 80 11 00 00 00 00 00 00 00 00 00    .}B.............
+
+Once you have the eeproms set correctly change the
+J560 straps as you desire.
+
+
+PPC440GX Ethernet EMACs
+=======================
+
+The XES XPedite1000 uses emac 2 & 3 and ignores emac 0 & 1.  PHYs are connected
+only to emac 2 & 3.  The HW Ethernet addresses are read from the i2c eeprom and
+placed in the bd info structure for enet2addr and enet3addr.  The ethernet driver
+senses that enetaddr and enet1addr are 0's and does not use them.
+
+As of this writing gigabit ethernet and the TCPIP acceleration hardware is not
+supported.
+
+
+Flash Support
+=============
+
+As of this writing, there is support for the 1/2mb boot flash only.  User flash
+is not yet supported.
+
+
+Regards,
+--Travis
+<travis.sawyer@sandburst.com>