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author | Bernardo Perez Priego <bernardo.perez.priego@intel.com> | 2020-01-14 15:59:19 -0800 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2020-01-18 11:19:49 +0000 |
commit | 1d8568c91413c76ee147bf6c09ae87197f7e75d7 (patch) | |
tree | 1e879dc796826b428e8576ac5074e9b3d835e265 /configs/config.intel_galileo_gen2.debug | |
parent | 954a5b50ad9d6ee31f0f0d7abe6badf412cbe9cc (diff) | |
download | coreboot-1d8568c91413c76ee147bf6c09ae87197f7e75d7.tar.xz |
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>
Diffstat (limited to 'configs/config.intel_galileo_gen2.debug')
0 files changed, 0 insertions, 0 deletions