diff mbox

[2/7] sh: add AT_HWCAP flag for J-Core cas.l instruction

Message ID f6b971971962df746873e8f031204b042ae03e14.1461880061.git.dalias@libc.org (mailing list archive)
State New, archived
Headers show

Commit Message

Rich Felker April 22, 2016, 11:29 p.m. UTC 
Signed-off-by: Rich Felker <dalias@libc.org>
---
 arch/sh/include/uapi/asm/cpu-features.h | 1 +
 arch/sh/kernel/cpu/sh2/probe.c          | 2 ++
 2 files changed, 3 insertions(+)
diff mbox

Patch

diff --git a/arch/sh/include/uapi/asm/cpu-features.h b/arch/sh/include/uapi/asm/cpu-features.h
index 694abe4..2f1bc85 100644
--- a/arch/sh/include/uapi/asm/cpu-features.h
+++ b/arch/sh/include/uapi/asm/cpu-features.h
@@ -22,5 +22,6 @@ 
 #define CPU_HAS_L2_CACHE	0x0080	/* Secondary cache / URAM */
 #define CPU_HAS_OP32		0x0100	/* 32-bit instruction support */
 #define CPU_HAS_PTEAEX		0x0200	/* PTE ASID Extension support */
+#define CPU_HAS_CAS_L		0x0400	/* cas.l atomic compare-and-swap */
 
 #endif /* __ASM_SH_CPU_FEATURES_H */
diff --git a/arch/sh/kernel/cpu/sh2/probe.c b/arch/sh/kernel/cpu/sh2/probe.c
index d8dbb81..ecf8360 100644
--- a/arch/sh/kernel/cpu/sh2/probe.c
+++ b/arch/sh/kernel/cpu/sh2/probe.c
@@ -33,6 +33,8 @@  void cpu_probe(void)
 	boot_cpu_data.dcache.entry_shift	= 5;
 	boot_cpu_data.dcache.linesz		= 32;
 	boot_cpu_data.dcache.flags		= 0;
+
+	boot_cpu_data.flags |= CPU_HAS_CAS_L;
 #else
 	/*
 	 * SH-2 doesn't have separate caches