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powerpc/mm/radix: Document software bits for radix

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Add #defines for Power ISA 3.0 software defined bits.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2016-04-29 23:26:33 +10:00 committed by Michael Ellerman
parent 17a3dd2f5f
commit 69dfbaeb65
1 changed files with 6 additions and 2 deletions
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8
arch/powerpc/include/asm/book3s/64/pgtable.h
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@ -20,12 +20,16 @@
/*
* Software bits
*/
#define _RPAGE_SW0 0x2000000000000000UL
#define _RPAGE_SW1 0x00800
#define _RPAGE_SW2 0x00400
#define _RPAGE_SW3 0x00200
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _PAGE_SOFT_DIRTY 0x00200 /* software: software dirty tracking */
#define _PAGE_SOFT_DIRTY _RPAGE_SW3 /* software: software dirty tracking */
#else
#define _PAGE_SOFT_DIRTY 0x00000
#endif
#define _PAGE_SPECIAL 0x00400 /* software: special page */
#define _PAGE_SPECIAL _RPAGE_SW2 /* software: special page */
#define _PAGE_PTE (1ul << 62) /* distinguishes PTEs from pointers */