[SCM] GNU Mach branch, master, updated. v1.7-28-gf6a2436

[Richard Braun]

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- Log -----------------------------------------------------------------
commit f6a2436d282a06e5f34789c8c5917e838fa26643
Author: Richard Braun <address@hidden>
Date:   Sat Sep 3 15:18:46 2016 +0200

    Fix early physical page allocation
    
    Import upstream biosmem and vm_page changes, and adjust for local
    modifications.
    
    Specifically, the biosmem module was mistakenly loading physical
    segments that did not clip with the heap as completely available.
    This change makes it load them as completely unavailable during
    startup, and once the VM system is ready, additional pages are
    loaded.
    
    * i386/i386at/biosmem.c (DEBUG): New macro.
    (struct biosmem_segment): Remove members `avail_start' and `avail_end'.
    (biosmem_heap_cur): Remove variable.
    (biosmem_heap_bottom, biosmem_heap_top, biosmem_heap_topdown): New 
variables.
    (biosmem_find_boot_data_update, biosmem_find_boot_data): Remove functions.
    (biosmem_find_heap_clip, biosmem_find_heap): New functions.
    (biosmem_setup_allocator): Rewritten to use the new biosmem_find_heap
    function.
    (biosmem_bootalloc): Support both bottom-up and top-down allocations.
    (biosmem_directmap_size): Renamed to ...
    (biosmem_directmap_end): ... this function.
    (biosmem_load_segment): Fix segment loading.
    (biosmem_setup): Restrict usable memory to the directmap segment.
    (biosmem_free_usable_range): Add checks on input parameters.
    (biosmem_free_usable_update_start, biosmem_free_usable_start,
    biosmem_free_usable_reserved, biosmem_free_usable_end): Remove functions.
    (biosmem_free_usable_entry): Rewritten to use the new biosmem_find_heap
    function.
    (biosmem_free_usable): Restrict usable memory to the directmap segment.
    * i386/i386at/biosmem.h (biosmem_bootalloc): Update description.
    (biosmem_directmap_size): Renamed to ...
    (biosmem_directmap_end): ... this function.
    (biosmem_free_usable): Update declaration.
    * i386/i386at/model_dep.c (machine_init): Call biosmem_free_usable.
    * vm/vm_page.c (DEBUG): New macro.
    (struct vm_page_seg): New member `heap_present'.
    (vm_page_load): Remove heap related parameters.
    (vm_page_load_heap): New function.
    * vm/vm_page.h (vm_page_load): Remove heap related parameters. Update
    description.
    (vm_page_load_heap): New function.

-----------------------------------------------------------------------

Summary of changes:
 i386/i386at/biosmem.c   |  368 +++++++++++++++++++++++++++--------------------
 i386/i386at/biosmem.h   |   26 ++--
 i386/i386at/model_dep.c |   10 ++
 vm/vm_page.c            |   45 ++++--
 vm/vm_page.h            |   15 +-
 5 files changed, 280 insertions(+), 184 deletions(-)


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