diff options
| author | Mark Salter <msalter@redhat.com> | 2010-10-27 18:28:56 +0200 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 18:28:56 +0200 |
| commit | 2502c64eeb125c5d57e3e7dc38320b500d69e088 (patch) | |
| tree | 65db73b829454c61a5616d2ec092897887c1cea2 /arch/mn10300 | |
| parent | MN10300: Map userspace atomic op regs as a vmalloc page (diff) | |
| download | linux-2502c64eeb125c5d57e3e7dc38320b500d69e088.tar.xz linux-2502c64eeb125c5d57e3e7dc38320b500d69e088.zip | |
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 a30d220de5ca..8157c9267f42 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 |