tree 2cb824d732d5628895b9256907cef0b678cbf363
parent ba7c9228d32da0c080dcb74a526127efeacc137f
author Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1265108943 +0000
committer Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1265108943 +0000

Create a physical memory mapping function which requests cached readonly memory

This should take care of picky Linux kernels which do not allow uncached
mappings to cached areas. Handle mapping failure gracefully (no forced
exit()) if the caller specifies it.

Such cached areas which can handle mapping failure are DMI tables and
coreboot tables. On failure we just ignore those tables. That is not
perfect, but a lot better than aborting flashrom due to an error in
nonessential functionality.

This should fix flashrom on a sizable number of machines where it
currently aborts early.

Yes, I could have exploited a Linux kernel bug to "solve" this, but
relying on such bugs is not exactly the best idea.

Corresponding to flashrom svn r889.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Vincent Pelletier <plr.vincent@gmail.com>