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authorBernardo Perez Priego <bernardo.perez.priego@intel.com>2020-01-14 15:59:19 -0800
committerPatrick Georgi <pgeorgi@google.com>2020-01-18 11:19:49 +0000
commit1d8568c91413c76ee147bf6c09ae87197f7e75d7 (patch)
tree1e879dc796826b428e8576ac5074e9b3d835e265 /util/lint/lint-000-license-headers
parent954a5b50ad9d6ee31f0f0d7abe6badf412cbe9cc (diff)
ec/google/wilco: Set minimum UCSI_ACPI region length
IMD provides support for small and large allocations. Region IMD Small memory is 1 KB with 32 Bytes alignment, this region holds smaller entries without having to reserve a whole 4 KB page. Remaining space is assigned to IMD Large to hold various regions with 4 KB alignment. The UCSI kernel (kernel version 4.19) driver maps the UCSI_ACPI memory as not cached. Cache mapping is set on page boundaries and all IMD Small is within the same page. If another driver maps the memory as write-back before the UCSI driver is loaded then the UCSI driver will fail to map the memory as not cached. Placing UCSI_ACPI in IMD Large region will prevent this mapping issue since it will now be located within its own page. This patch will force UCSI_ACPI region to be located in IMD Large region. BUG=b:144826008 Signed-off-by: Bernardo Perez Priego <bernardo.perez.priego@intel.com> Change-Id: Id00e76dca240279773a95c8054831e05df390664 Reviewed-on: https://review.coreboot.org/c/coreboot/+/38414 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Mathew King <mathewk@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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