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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: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Mark Salter 2010-10-27 17:28:56 +01:00 committed by David Howells
parent 5a226c6f5c
commit 2502c64eeb
1 changed files with 10 additions and 0 deletions
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10
arch/mn10300/include/asm/elf.h
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@ -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