From 2502c64eeb125c5d57e3e7dc38320b500d69e088 Mon Sep 17 00:00:00 2001 From: Mark Salter Date: Wed, 27 Oct 2010 17:28:56 +0100 Subject: [PATCH] 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 Signed-off-by: David Howells --- arch/mn10300/include/asm/elf.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/mn10300/include/asm/elf.h b/arch/mn10300/include/asm/elf.h index a30d220de5ca..8157c9267f42 100644 --- a/arch/mn10300/include/asm/elf.h +++ b/arch/mn10300/include/asm/elf.h @@ -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