AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

Revert "agp: AMD AGP is used on UP1100 & UP1500 alpha boxen"

Browse Source 
This reverts commit f191f14407.

The AMD 751 and 761 chipsets are used on the UP1000, UP1100, and UP1500
OEM motherboards, but they neglect to do anything to make AGP work.

According to Ivan Kokshaysky:
There is quite fundamental conflict between the Alpha architecture and
x86 AGP implementation - Alpha is entirely cache coherent by design,
while x86 AGP is not (I mean native AGP DMA transactions, not a PCI over
AGP). There are no such things as non-cacheable mappings or software
support for cache flushing/invalidation on Alpha, so x86 AGP code won't
work on Nautilus.

So there's no point in allowing this driver to be configured on Alpha.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Matt Turner 2011-02-01 11:54:15 -05:00 committed by Dave Airlie
parent 4b863b3d3e
commit cecd1455bc
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/char/agp/Kconfig
View File

@ -50,7 +50,7 @@ config AGP_ATI
config AGP_AMD
tristate "AMD Irongate, 761, and 762 chipset support"
depends on AGP && (X86_32 || ALPHA)
depends on AGP && X86_32
help
This option gives you AGP support for the GLX component of
X on AMD Irongate, 761, and 762 chipsets.