[U-Boot] [PATCH 1/2] ARM926EJS: Make asm routines volatile in cache ops

[Stefano Babic <sbabic@denx.de>]

On 06/04/2012 15:25, Marek Vasut wrote:
> We certainly don't want the compiler to reorganise the code for dcache flushing.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
> ---
>  arch/arm/cpu/arm926ejs/cache.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/cpu/arm926ejs/cache.c b/arch/arm/cpu/arm926ejs/cache.c
> index 5b23e3a..0b36294 100644
> --- a/arch/arm/cpu/arm926ejs/cache.c
> +++ b/arch/arm/cpu/arm926ejs/cache.c
> @@ -82,7 +82,7 @@ void flush_dcache_range(unsigned long start, unsigned long stop)
>  		start += CONFIG_SYS_CACHELINE_SIZE;
>  	}
>  
> -	asm("mcr p15, 0, %0, c7, c10, 4\n"::"r"(0));
> +	asm volatile("mcr p15, 0, %0, c7, c10, 4\n"::"r"(0));
>  }
>  
>  void flush_cache(unsigned long start, unsigned long size)

Acked-by: Stefano Babic <sbabic@denx.de>

Thanks to point this issue - the same happens on MX3x. I will send a
patch (ptch for cache in ARM1136 is already merged).

Stefano

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