Justin C. Miller 3dffe564af [kernel] Set framebuffer to write-combining ...

Several changes were needed to make this work:

- Update the page_table::flags to understand memory caching types
- Set up the PAT MSR to add the WC option
- Make page-offset area mapped as WT
- Add all the MTRR and PAT MSRs, and log the MTRRs for verification
- Add a vm_area flag for write_combining

2021-01-18 13:49:59 -08:00

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