[U-Boot] [PATCH v6 01/10] mips: implement to access the KSEG0/1 memory range in map_physmem

[Thomas Chou <thomas@wytron.com.tw>]

Hi Wills,

On 2016?01?04? 19:14, Wills Wang wrote:
> U-boot just use the no MMU virtual address segment(KSEG0/1), this
> patch enable access the uncached memory range(KSEG1) by flag
> "MAP_NOCACHE", other flag for KSEG0 access.
>
> Signed-off-by: Wills Wang <wills.wang@live.com>
> ---
>
> Changes in v6:
> - Remove useless "else"
>
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
>
>   arch/mips/include/asm/io.h | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
> index a7ab087..77353e5 100644
> --- a/arch/mips/include/asm/io.h
> +++ b/arch/mips/include/asm/io.h
> @@ -485,7 +485,7 @@ 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)
> @@ -493,7 +493,9 @@ static inline void sync(void)
>   static inline void *
>   map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
>   {
> -	return (void *)paddr;
> +	if (flags)
> +		return (void *)KSEG1ADDR(paddr);
> +	return (void *)KSEG0ADDR(paddr);
>   }
>
>   /*
>

But Daniel has suggested CKSEG1ADDR() instead. :)

Best regards,
Thomas