[U-Boot] [PATCH] nios2: fix map_physmem to do real cache mapping

[Marek Vasut]

On Tuesday, October 27, 2015 at 02:09:43 AM, Thomas Chou wrote:
> Fix the map_physmem() to do real cache mapping.
> 
> Signed-off-by: Thomas Chou <thomas at wytron.com.tw>

Acked-by: Marek Vasut <marex at denx.de>

[...]

>  #include <asm-generic/global_data.h>
> diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
> index e7da35b..007df8d 100644
> --- a/arch/nios2/include/asm/io.h
> +++ b/arch/nios2/include/asm/io.h
> @@ -18,7 +18,7 @@ static inline void sync(void)
>   * that can be used to access the memory range with the caching
>   * properties specified by "flags".
>   */
> -#define MAP_NOCACHE	(0)
> +#define MAP_NOCACHE	(1)
>  #define MAP_WRCOMBINE	(0)
>  #define MAP_WRBACK	(0)
>  #define MAP_WRTHROUGH	(0)

Eventually, you might want to create a patch to drop these useless parenthesis.

> @@ -26,7 +26,11 @@ static inline void sync(void)
>  static inline void *
>  map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
>  {
> -	return (void *)paddr;
> +	DECLARE_GLOBAL_DATA_PTR;
> +	if (flags)
> +		return (void *)(paddr | gd->arch.io_region_base);
> +	else
> +		return (void *)(paddr | gd->arch.mem_region_base);
>  }
> 
>  /*

Best regards,
Marek Vasut