david/ipxe
david/ipxe
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My fork of git://git.ipxe.org/ipxe.git, it is used for my netboot environment at home.
This repository has been archived on 2020-12-06. You can view files and clone it, but cannot push or open issues or pull requests.
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173c48a57e
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Michael Brown 173c48a57e [romprefix] Report an optimistic runtime size estimate 
Commit 5de45cd ("[romprefix] Report a pessimistic runtime size
estimate") set the PCI3.0 "runtime size" field equal to the worst-case
runtime size, on the basis that there is no guarantee that PMM
allocation will succeed and hence no guarantee that we will be able to
shrink the ROM image.

On a PCI3.0 system where PMM allocation would succeed, this can cause
the BIOS to unnecessarily refuse to initialise the iPXE ROM due to a
perceived shortage of option ROM space.

Fix by reporting the best-case runtime size via the PCI header, and
checking that we have sufficient runtime space (if applicable).  This
allows iPXE ROMs to initialise on PCI3.0 systems that might otherwise
fail due to a shortage of option ROM space.

This may cause iPXE ROMs to fail to initialise on PCI3.0 systems where
PMM is broken.  (Pre-PCI3.0 systems are unaffected since there must
already have been sufficient option ROM space available for the
initialisation entry point to be called.)

On balance, it seems preferable to avoid breaking "good" systems
(PCI3.0 with working PMM) at the cost of potentially breaking "bad"
systems (PCI3.0 with broken PMM).

Signed-off-by: Michael Brown <mcb30@ipxe.org>
2016-01-06 00:30:23 +00:00
contrib [errdb] Strip platform error code for non-platform-generated errors 2013-04-29 15:36:32 +01:00
src [romprefix] Report an optimistic runtime size estimate 2016-01-06 00:30:23 +00:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org