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Commit e0a45e35 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Define PAGE_OFFSET in terms of physical address bits. 



This makes clearer the implications for a given choosen
value.

Based upon patches by Bob Picco.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Acked-by: default avatarBob Picco <bob.picco@oracle.com>
parent 922631b9

arch/sparc/include/asm/page_64.h

+3 −1
Original line number Diff line number Diff line
@@ -117,7 +117,9 @@ typedef pte_t *pgtable_t; 
/* We used to stick this into a hard-coded global register (%g4)

 * but that does not make sense anymore.

 */

#define PAGE_OFFSET		_AC(0xFFFFF80000000000,UL)

#define MAX_SUPPORTED_PA_BITS	43

#define PAGE_OFFSET_BY_BITS(X)	(-(_AC(1,UL) << (X)))

#define PAGE_OFFSET		PAGE_OFFSET_BY_BITS(MAX_SUPPORTED_PA_BITS)



#ifndef __ASSEMBLY__