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Commit 2502c64e authored by Mark Salter's avatar Mark Salter Committed by David Howells
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MN10300: Specify an ELF HWCAP flag for MN10300 Atomic Operations Unit support 



Use an ELF HWCAP flag to indicate to the process that the CPU provides LL/SC
equivalent atomic operations unit support in addition to BSET/BCLR.

Signed-off-by: default avatarMark Salter <msalter@redhat.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 5a226c6f

arch/mn10300/include/asm/elf.h

+10 −0
Original line number Diff line number Diff line
@@ -31,6 +31,12 @@ 
#define R_MN10300_SYM_DIFF	33	/* Adjustment when relaxing. */

#define R_MN10300_ALIGN 	34	/* Alignment requirement. */



/*

 * AM33/AM34 HW Capabilities

 */

#define HWCAP_MN10300_ATOMIC_OP_UNIT	1	/* Has AM34 Atomic Operations */





/*

 * ELF register definitions..

 */
@@ -128,7 +134,11 @@ do { \ 
 * instruction set this CPU supports.  This could be done in user space,

 * but it's not easy, and we've already done it here.

 */

#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT

#define ELF_HWCAP	(HWCAP_MN10300_ATOMIC_OP_UNIT)

#else

#define ELF_HWCAP	(0)

#endif



/*

 * This yields a string that ld.so will use to load implementation