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RE: [Xen-devel] [PATCH][IOEMU] e1000 emulation

To: alex.williamson@xxxxxx
Subject: RE: [Xen-devel] [PATCH][IOEMU] e1000 emulation
From: Tina Yang <tina.yang@xxxxxxxxxx>
Date: Tue, 26 Feb 2008 14:50:41 -0800
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>   The attached patch adds e1000 emulation to Xen.  This is a direct
>port of the e1000 driver currently in Qemu CVS with extremely minimal
>changes (as shown below).  This is useful for Xen as new OSes may not
>support the old 100Mbps NICs we currently support (especially on
>non-x86).  Drivers for e1000 should be more readily available.

        Per Intel 82540EM Software Developer's Manual pp. 211,
        the mmio size is 0x20000, or address overlapping occurs
        and causes the second card to fail, which happened to me


--- tools/ioemu/hw/e1000.c.orig 2008-02-26 10:55:00.113124000 -0800
+++ tools/ioemu/hw/e1000.c      2008-02-26 10:55:00.111124000 -0800
@@ -48,7 +48,7 @@ static int debugflags = DBGBIT(TXERR) |

 #define IOPORT_SIZE       0x40
-#define PNPMMIO_SIZE      0x60000
+#define PNPMMIO_SIZE      0x20000

  * HW models:

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