[coreboot] TOM2 and M4A785T-M

Denis 'GNUtoo' Carikli GNUtoo at no-log.org
Thu Jan 5 17:19:00 CET 2012

Hi, is it normal that TOM2 is 0 on the M4A785T-M mainboard?

Here are the logs from coreboot:
Sysmem TOM = 0_80000000
Sysmem TOM2 = 0_0
Setting fixed MTRRs(0-88) type: UC
Setting fixed MTRRs(0-16) Type: WB, RdMEM, WrMEM
Setting fixed MTRRs(24-88) Type: WB, RdMEM, WrMEM
DONE fixed MTRRs
Setting variable MTRR 0, base:    0MB, range: 2048MB, type WB
Setting variable MTRR 1, base: 1792MB, range:  256MB, type UC
DONE variable MTRRs
Clear out the extra MTRR's
call enable_var_mtrr()
Leave x86_setup_var_mtrrs

MTRR check
Fixed MTRRs   : Enabled
Variable MTRRs: Enabled

And from the linux kernel:
[    0.312294] mtrr: your CPUs had inconsistent variable MTRR settings
[    0.312295] mtrr: probably your BIOS does not setup all CPUs.
[    0.312296] mtrr: corrected configuration.
[    0.317404] ACPI: Executed 2 blocks of module-level executable AML code
[    0.383560] ACPI: Interpreter enabled
[    0.384025] ACPI: (supports S0 S1 S2 S3 S4 S5)
[    0.392816] ACPI: BIOS offers _BFS
[    0.396026] ACPI: If "acpi.bfs=1" improves resume, please notify linux-
acpi at vger.kernel.org
[    0.400025] ACPI: Using IOAPIC for interrupt routing
[    0.432761] ACPI: Power Resource [PFN0] (on)
[    0.444081] ACPI: No dock devices found.
[    0.448028] HEST: Table not found.
[    0.451490] PCI: Ignoring host bridge windows from ACPI; if necessary, use 
"pci=use_crs" and report a bug
[    0.452071] ACPI Error: [TOM2] Namespace lookup failure, AE_NOT_FOUND 
[    0.460029] ACPI Error: Method parse/execution failed [\_SB_.PCI0._CRS] 
(Node f4426e70), AE_NOT_FOUND (20110112/psparse-536)
[    0.472033] [Firmware Bug]: ACPI: no secondary bus range in _CRS
[    0.476035] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.480086] ACPI Error: [TOM2] Namespace lookup failure, AE_NOT_FOUND 
[    0.492031] ACPI Error: Method parse/execution failed [\_SB_.PCI0._CRS] 
(Node f4426e70), AE_NOT_FOUND (20110112/psparse-536)


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