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| author | Mark Salter <msalter@redhat.com> | 2010-10-27 17:28:56 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 17:28:56 +0100 |
| commit | 2502c64eeb125c5d57e3e7dc38320b500d69e088 (patch) | |
| tree | 65db73b829454c61a5616d2ec092897887c1cea2 /arch/mn10300 | |
| parent | 5a226c6f5c374a0d565dac609907085b944979b5 (diff) | |
| download | op-kernel-dev-2502c64eeb125c5d57e3e7dc38320b500d69e088.zip op-kernel-dev-2502c64eeb125c5d57e3e7dc38320b500d69e088.tar.gz | |
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>
Diffstat (limited to 'arch/mn10300')
| -rw-r--r-- | arch/mn10300/include/asm/elf.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/elf.h b/arch/mn10300/include/asm/elf.h index a30d220..8157c92 100644 --- a/arch/mn10300/include/asm/elf.h +++ b/arch/mn10300/include/asm/elf.h @@ -32,6 +32,12 @@ #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.. */ typedef unsigned long elf_greg_t; @@ -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 |
