aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMark Salter <msalter@redhat.com>2010-10-27 12:28:56 -0400
committerDavid Howells <dhowells@redhat.com>2010-10-27 12:28:56 -0400
commit2502c64eeb125c5d57e3e7dc38320b500d69e088 (patch)
tree65db73b829454c61a5616d2ec092897887c1cea2
parent5a226c6f5c374a0d565dac609907085b944979b5 (diff)
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>
-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 a30d220de5ca..8157c9267f42 100644
--- a/arch/mn10300/include/asm/elf.h
+++ b/arch/mn10300/include/asm/elf.h
@@ -32,6 +32,12 @@
32#define R_MN10300_ALIGN 34 /* Alignment requirement. */ 32#define R_MN10300_ALIGN 34 /* Alignment requirement. */
33 33
34/* 34/*
35 * AM33/AM34 HW Capabilities
36 */
37#define HWCAP_MN10300_ATOMIC_OP_UNIT 1 /* Has AM34 Atomic Operations */
38
39
40/*
35 * ELF register definitions.. 41 * ELF register definitions..
36 */ 42 */
37typedef unsigned long elf_greg_t; 43typedef unsigned long elf_greg_t;
@@ -128,7 +134,11 @@ do { \
128 * instruction set this CPU supports. This could be done in user space, 134 * instruction set this CPU supports. This could be done in user space,
129 * but it's not easy, and we've already done it here. 135 * but it's not easy, and we've already done it here.
130 */ 136 */
137#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT
138#define ELF_HWCAP (HWCAP_MN10300_ATOMIC_OP_UNIT)
139#else
131#define ELF_HWCAP (0) 140#define ELF_HWCAP (0)
141#endif
132 142
133/* 143/*
134 * This yields a string that ld.so will use to load implementation 144 * This yields a string that ld.so will use to load implementation