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imp e75188d9b5 The Atheros AR71xx CPUs, when paired with the AR5212 parts, has a bug 
that generates a fatal bus trap.  Normally, the chips are setup to do
128 byte DMA bursts, but when on this CPU, they can only safely due
4-byte DMA bursts due to this bug.  Details of the exact nature of the
bug are sketchy, but some can be found at
https://forum.openwrt.org/viewtopic.php?pid=70060 on pages 4, 5 and 6.
There's a small performance penalty associated with this workaround,
so it is only enabled when needed on the Atheros AR71xx platforms.

Unfortunately, this condition is impossible to detect at runtime
without MIPS specific ifdefs.  Rather than cast an overly-broad net
like Linux/OpenWRT dues (which enables this workaround all the time on
MIPS32 platforms), we put this option in the kernel for just the
affected machines.  Sam didn't like this aspect of the patch when he
reviewed it, and I'd love to hear sane proposals on how to fix it :)

Reviewed by:	sam@
2010-05-01 16:36:14 +00:00
..
defines Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
files Merge ACPICA 20100428. 2010-04-28 22:25:27 +00:00
files.amd64 - Support for uncore counting events: one fixed PMC with the uncore 2010-04-02 13:23:49 +00:00
files.arm Add hwpmc_arm.c 2009-12-23 23:53:30 +00:00
files.i386 - Support for uncore counting events: one fixed PMC with the uncore 2010-04-02 13:23:49 +00:00
files.ia64 Provide groundwork for 32-bit binary compatibility on non-x86 platforms, 2010-03-11 14:49:06 +00:00
files.mips Remove unused file. 2010-04-19 07:51:57 +00:00
files.pc98 - Support for uncore counting events: one fixed PMC with the uncore 2010-04-02 13:23:49 +00:00
files.powerpc Move libteken out of the syscons directory. 2009-09-03 09:33:57 +00:00
files.sparc64 Fix some sorting and whitespace nits. 2010-04-24 16:27:43 +00:00
files.sun4v Fix some sorting and whitespace nits. 2010-04-24 16:27:43 +00:00
kern.mk WITH_CTF can now be specified in src.conf (not recommended, there 2010-04-02 06:55:31 +00:00
kern.post.mk WITH_CTF can now be specified in src.conf (not recommended, there 2010-04-02 06:55:31 +00:00
kern.pre.mk Revert r206179 (by imp) and do something similar which is more consistent 2010-04-22 09:20:17 +00:00
kmod_syms.awk Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
kmod.mk Do the ctfmerge (= all symbols, not only symbols from one object file) for 2010-04-22 09:24:01 +00:00
ldscript.amd64 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
ldscript.arm Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
ldscript.i386 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
ldscript.ia64 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
ldscript.mips - Move .text and all sections up to .bss inclusive to the beginning of 2010-01-23 05:59:10 +00:00
ldscript.mips.cfe Use KERNLOADADDR instead of hardcoded address. This is required to be able to 2010-02-22 01:48:38 +00:00
ldscript.mips.mips64 Put back KERNLOADADDR. 2009-09-09 00:46:11 +00:00
ldscript.mips.octeon1.32 Harmonize Octeon ldscripts, reducing gratuitous diffs and using KERNLOADADDR in 2010-03-05 23:03:20 +00:00
ldscript.mips.octeon1.64 Harmonize Octeon ldscripts, reducing gratuitous diffs and using KERNLOADADDR in 2010-03-05 23:03:20 +00:00
ldscript.mips.octeon1.n32 Harmonize Octeon ldscripts, reducing gratuitous diffs and using KERNLOADADDR in 2010-03-05 23:03:20 +00:00
ldscript.powerpc Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
ldscript.sparc64 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.amd64 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.arm Add support for Cavium Econa CNS11XX ARM boards. These boards were 2010-01-04 03:35:45 +00:00
Makefile.i386 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.ia64 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.mips Merge r187428, r191079, r195533, r195669, r197004, r197012 and r197015 2010-01-10 05:34:46 +00:00
Makefile.pc98 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.powerpc Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.sparc64 Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
Makefile.sun4v Revert config(8) version bump. It brings major pain for people working on 2007-05-16 17:23:54 +00:00
makeLINT.mk Generate a second LINT configuration for i386 and amd64 in 2010-01-08 19:00:20 +00:00
makeLINT.sed Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
newvers.sh Revert to r197433, the more recent change doesn't work for the common 2010-03-10 01:00:37 +00:00
NOTES The Atheros AR71xx CPUs, when paired with the AR5212 parts, has a bug 2010-05-01 16:36:14 +00:00
options The Atheros AR71xx CPUs, when paired with the AR5212 parts, has a bug 2010-05-01 16:36:14 +00:00
options.amd64 Provide groundwork for 32-bit binary compatibility on non-x86 platforms, 2010-03-11 14:49:06 +00:00
options.arm Add support for Cavium Econa CNS11XX ARM boards. These boards were 2010-01-04 03:35:45 +00:00
options.i386 Make NKPT a kernel option on i386 so that it can be set to a non-default 2010-03-10 19:50:52 +00:00
options.ia64 Provide groundwork for 32-bit binary compatibility on non-x86 platforms, 2010-03-11 14:49:06 +00:00
options.mips Add CPU_CNMIPS for the core that's in Octeon CPUs. 2010-02-25 11:54:10 +00:00
options.pc98 Unbreak the build for pc98. Specify the newly introduced, for ia32, 2010-01-16 12:24:12 +00:00
options.powerpc Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
options.sparc64 Add a driver for the `Fire' JBus to PCIe bridges found in at least 2009-12-27 16:55:44 +00:00
options.sun4v
systags.sh Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00