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authorMark Salter <msalter@redhat.com>2010-10-27 17:28:56 +0100
committerDavid Howells <dhowells@redhat.com>2010-10-27 17:28:56 +0100
commit2502c64eeb125c5d57e3e7dc38320b500d69e088 (patch)
tree65db73b829454c61a5616d2ec092897887c1cea2 /arch/mn10300
parent5a226c6f5c374a0d565dac609907085b944979b5 (diff)
downloadlinux-2.6.38-lt-ux500-2502c64eeb125c5d57e3e7dc38320b500d69e088.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.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/elf.h b/arch/mn10300/include/asm/elf.h
index a30d220de5c..8157c9267f4 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