17b4803381
Lower 20bits of TOLUD register include 19 reserved bits and 1 lock bit. If lock bit is set, then northbridge.asl was reporting the base address of low MMIO incorrectly i.e. off by 1. This resulted in Linux kernel complaining that the MMIO window allocated to the device at the base of low MMIO is incorrect: pci 0000:00:1c.0: can't claim BAR 8 [mem 0x7fc00000-0x7fcfffff]: no compatible brw pci 0000:00:1c.0: [mem 0x7fc00000-0x7fcfffff] clipped to [mem 0x7fc00001-0x7fcfff] pci 0000:00:1c.0: bridge window [mem 0x7fc00001-0x7fcfffff] This change masks the lower 20 bits of TOLUD register when exposing it in the ACPI tables to ensure that the base address of low MMIO region is reported correctly. TEST=Verified that kernel dmesg no longer complains about the BAR at base of low MMIO. Signed-off-by: Furquan Shaikh <furquan@google.com> Change-Id: I4849367d5fa03d70c50dc97c7e84454a65d1887a Reviewed-on: https://review.coreboot.org/c/coreboot/+/41455 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> |
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