the following patch was just integrated into master: commit 061c66406ffebb298ba06ac7ecf7e14c5d55cc24 Author: Mike Loptien mike.loptien@se-eng.com Date: Fri Mar 15 13:24:53 2013 -0600
Lippert Fam14 DSDT: Add OSC method
The _OSC method is used to tell the OS what capabilities it can take control over from the firmware. This method is described in chapter 6.2.9 of the ACPI spec v3.0. The method takes 4 inputs (UUID, Rev ID, Input Count, and Capabilities Buffer) and returns a Capabilites Buffer the same size as the input Buffer. This Buffer is generally 3 Dwords long consisting of an Errors Dword, a Supported Capabilities Dword, and a Control Dword. The OS will request control of certain capabilities and the firmware must grant or deny control of those features. We do not want to have control over anything so let the OS control as much as it can.
The _OSC method is required for PCIe devices and dmesg checks for its existence and issues an error if it is not found.
This is the same change made to Persimmon with Change-ID I149428: http://review.coreboot.org/#/c/2684/
Change-Id: Iaf7b8153cec4d730efbceae3e6957d2904b8fae4 Signed-off-by: Mike Loptien mike.loptien@se-eng.com Reviewed-on: http://review.coreboot.org/2740 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer stefan.reinauer@coreboot.org
Build-Tested: build bot (Jenkins) at Fri Mar 15 21:04:38 2013, giving +1 Reviewed-By: Stefan Reinauer stefan.reinauer@coreboot.org at Sun Mar 17 19:54:07 2013, giving +2 See http://review.coreboot.org/2740 for details.
-gerrit