MIPS: Add support for XPA.

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Add support for extended physical addressing (XPA) so that
32-bit platforms can access equal to or greater than 40 bits
of physical addresses.

NOTE:
      1) XPA and EVA are not the same and cannot be used
         simultaneously.
      2) If you configure your kernel for XPA, the PTEs
         and all address sizes become 64-bit.
      3) Your platform MUST have working HIGHMEM support.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9355/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

...

This commit is contained in:

Steven J. Hill 2015-02-26 18:16:38 -06:00 • committed by Ralf Baechle

parent be0c37c985

commit c5b367835c

11 changed files with 173 additions and 44 deletions

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35

arch/mips/Kconfig

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3

arch/mips/include/asm/cpu-features.h

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1

arch/mips/include/asm/cpu.h

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15

arch/mips/include/asm/pgtable-32.h

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13

arch/mips/include/asm/pgtable-bits.h

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36

arch/mips/include/asm/pgtable.h

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4

arch/mips/kernel/cpu-probe.c

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1

arch/mips/kernel/proc.c

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7

arch/mips/mm/init.c

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12

arch/mips/mm/tlb-r4k.c

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90

arch/mips/mm/tlbex.c

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