Changeset c520034 in mainline for kernel/arch/sparc64/src/mm/page.c


Ignore:
Timestamp:
2011-12-31T18:19:35Z (13 years ago)
Author:
Jakub Jermar <jakub@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
295f658, 77c2b02, 96cd5b4
Parents:
852052d (diff), 22f0561 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Support for kernel non-identity mappings, phase I.

  • identity/non-identity kernel memory split on all architectures
  • low/high physical memory split on all architectures
  • frame allocator understands low/high memory
  • high physical memory currently unused (Phase II)
  • more compact frame_t
  • zone conf frames, pte_t, kernel stacks allocated from low memory
  • lockless TLB-miss handlers everywhere (newly sparc64, ia64)
  • preallocate PTL1 page tables for non-identity and prevent their deallocation
  • hw_map() unification
  • new resource allocator used for allocating kernel virtual addresses

Breakage:

  • sparc64/sun4v creates too large kernel identity; not fixed because of lack of testing hw
  • ppc32's tlb_refill() seems wrong as it creates too large kernel identity, but appears unused and the architecture works normally

Not implemented yet (phase II):

  • allow high memory to be used for common kernel allocations
File:
1 edited

Legend:

Unmodified
Added
Removed
  • kernel/arch/sparc64/src/mm/page.c

    r852052d rc520034  
    5151}
    5252
    53 /** Map memory-mapped device into virtual memory.
    54  *
    55  * We are currently using identity mapping for mapping device registers.
    56  *
    57  * @param physaddr Physical address of the page where the device is
    58  *                 located.
    59  * @param size     Size of the device's registers.
    60  *
    61  * @return Virtual address of the page where the device is mapped.
    62  *
    63  */
    64 uintptr_t hw_map(uintptr_t physaddr, size_t size)
    65 {
    66         return PA2KA(physaddr);
    67 }
    68 
    6953/** @}
    7054 */
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