diff options
| -rw-r--r-- | tools/arch/sh/include/asm/barrier.h | 32 | ||||
| -rw-r--r-- | tools/include/asm/barrier.h | 2 | ||||
| -rw-r--r-- | tools/perf/MANIFEST | 1 | ||||
| -rw-r--r-- | tools/perf/perf-sys.h | 9 |
4 files changed, 35 insertions, 9 deletions
diff --git a/tools/arch/sh/include/asm/barrier.h b/tools/arch/sh/include/asm/barrier.h new file mode 100644 index 000000000000..c18fd7599b97 --- /dev/null +++ b/tools/arch/sh/include/asm/barrier.h @@ -0,0 +1,32 @@ +/* + * Copied from the kernel sources: + * + * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima + * Copyright (C) 2002 Paul Mundt + */ +#ifndef __TOOLS_LINUX_ASM_SH_BARRIER_H +#define __TOOLS_LINUX_ASM_SH_BARRIER_H + +/* + * A brief note on ctrl_barrier(), the control register write barrier. + * + * Legacy SH cores typically require a sequence of 8 nops after + * modification of a control register in order for the changes to take + * effect. On newer cores (like the sh4a and sh5) this is accomplished + * with icbi. + * + * Also note that on sh4a in the icbi case we can forego a synco for the + * write barrier, as it's not necessary for control registers. + * + * Historically we have only done this type of barrier for the MMUCR, but + * it's also necessary for the CCR, so we make it generic here instead. + */ +#if defined(__SH4A__) || defined(__SH5__) +#define mb() __asm__ __volatile__ ("synco": : :"memory") +#define rmb() mb() +#define wmb() mb() +#endif + +#include <asm-generic/barrier.h> + +#endif /* __TOOLS_LINUX_ASM_SH_BARRIER_H */ diff --git a/tools/include/asm/barrier.h b/tools/include/asm/barrier.h index 7eb88946e072..1338c8a404ef 100644 --- a/tools/include/asm/barrier.h +++ b/tools/include/asm/barrier.h @@ -4,4 +4,6 @@ #include "../../arch/powerpc/include/asm/barrier.h" #elif defined(__s390__) #include "../../arch/s390/include/asm/barrier.h" +#elif defined(__sh__) +#include "../../arch/sh/include/asm/barrier.h" #endif diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST index ac62cafa62ec..2ceb1b262729 100644 --- a/tools/perf/MANIFEST +++ b/tools/perf/MANIFEST @@ -1,6 +1,7 @@ tools/perf tools/arch/powerpc/include/asm/barrier.h tools/arch/s390/include/asm/barrier.h +tools/arch/sh/include/asm/barrier.h tools/arch/x86/include/asm/barrier.h tools/scripts tools/build diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h index f44e53efd9a4..7ef5e821d418 100644 --- a/tools/perf/perf-sys.h +++ b/tools/perf/perf-sys.h @@ -46,15 +46,6 @@ #endif #ifdef __sh__ -#if defined(__SH4A__) || defined(__SH5__) -# define mb() asm volatile("synco" ::: "memory") -# define wmb() asm volatile("synco" ::: "memory") -# define rmb() asm volatile("synco" ::: "memory") -#else -# define mb() asm volatile("" ::: "memory") -# define wmb() asm volatile("" ::: "memory") -# define rmb() asm volatile("" ::: "memory") -#endif #define CPUINFO_PROC {"cpu type"} #endif |