tree 799a6b18704e411231416812ac37fa086e574206
parent 7da3f488b65dfd461beaa9cd5814ebc5adbc7b3a
author Daniel Verkamp <dverkamp@chromium.org> 1600712760 -0700
committer Ram Muthiah <rammuthiah@google.com> 1600895280 -0700

x86_64: calculate CMOS memory values from mem map

The existing mem_below_4g/mem_above_4g calculations did not match the
actual layout used when populating guest memory.  Rather than
duplicating the logic in setup_io_bus to calculate the values reported
in CMOS, just reuse the arch_memory_regions function and count the bytes
in the regions below and above the 4G boundary.

Bug: 168740534
Bug: 168628037
Link: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2422129
TEST: Verify u-boot reports 4 GiB with crosvm --mem=4096

Change-Id: I32a70f19848595eaefd2e31c9f31a260d6ce4453