Paul Menzel (paulepanter@users.sourceforge.net) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3320
-gerrit
commit c01c14831f27d7a37c6fd2b9f530c68d4dfc5c2b Author: Rudolf Marek r.marek@assembler.cz Date: Mon May 27 20:39:18 2013 +0200
Asus F2A85-M: Fix the _CRS PCI0 bus info
On Asus F2A85-M, the Linux kernel complains that the _CRS method does not specify the number of PCI busses.
[FIRMWARE BUG]: ACPI: no secondary bus range in _CRS
Just put there 256. This should be part of re-factoring of the whole ACPI stuff.
The same change was already done for the AMD Brazos (SB800) boards, based on commit »Persimmon DSDT: Add secondary bus range to PCI0« (4733c647) [1].
[1] http://review.coreboot.org/2592
Change-Id: I06f90ec353df9198a20b2165741ea0fe94071266 Signed-off-by: Rudolf Marek r.marek@assembler.cz --- src/mainboard/asus/f2a85-m/dsdt.asl | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/src/mainboard/asus/f2a85-m/dsdt.asl b/src/mainboard/asus/f2a85-m/dsdt.asl index d9f8fa4..e98b6b3 100644 --- a/src/mainboard/asus/f2a85-m/dsdt.asl +++ b/src/mainboard/asus/f2a85-m/dsdt.asl @@ -1307,6 +1307,22 @@ DefinitionBlock ( } /* end Ac97modem */
Name(CRES, ResourceTemplate() { + /* Set the Bus number and Secondary Bus number for the PCI0 device + * The Secondary bus range for PCI0 lets the system + * know what bus values are allowed on the downstream + * side of this PCI bus if there is a PCI-PCI bridge. + * PCI busses can have 256 secondary busses which + * range from [0-0xFF] but they do not need to be + * sequential. + */ + WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode, + 0x0000, /* address granularity */ + 0x0000, /* range minimum */ + 0x00FF, /* range maximum */ + 0x0000, /* translation */ + 0x0100, /* length */ + ,, PSB0) /* ResourceSourceIndex, ResourceSource, DescriptorName */ + IO(Decode16, 0x0CF8, 0x0CF8, 1, 8)
WORDIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,