[mmio][test] Add an offset field to reduce the registers required

Allow an offset to be added to the given mock register array. All
register accesses will reduced by this offset so that fewer mock
registers need to be allocated in some cases.

Bug: 110700
Test: fx test mock-mmio-reg-test
Change-Id: I86bc439366356d572d4b117688d8ed101fc1f10a
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/733223
Reviewed-by: Ruby Zhuang <rdzhuang@google.com>
Commit-Queue: Braden Kell <bradenkell@google.com>
2 files changed
tree: 29dd88e3336db03cb506b4e245fe470450478bda
  1. boards/
  2. build/
  3. bundles/
  4. docs/
  5. examples/
  6. products/
  7. scripts/
  8. sdk/
  9. src/
  10. third_party/
  11. tools/
  12. zircon/
  13. .clang-format
  14. .clang-tidy
  15. .editorconfig
  16. .git-blame-ignore-revs
  17. .gitattributes
  18. .gitignore
  19. .gn
  20. .style.yapf
  21. analysis_options.yaml
  22. AUTHORS
  23. BUILD.gn
  24. CODE_OF_CONDUCT.md
  25. CONTRIBUTING.md
  26. LICENSE
  27. OWNERS
  28. PATENTS
  29. pyrightconfig.json
  30. README.md
  31. rustfmt.toml
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