[U-Boot] [PATCH v5 1/5] mips: implement to access the KSEG0/1 memory range in map_physmem

[Wills Wang]

On 12/29/2015 08:49 PM, Antony Pavlov wrote:
> On Tue, 29 Dec 2015 19:17:09 +0800
> Wills Wang <wills.wang at live.com> 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 at live.com>
>> ---
>>
>> Changes in v5: None
>> Changes in v4: None
>> Changes in v3: None
>> Changes in v2: None
>>
>>   arch/mips/include/asm/io.h | 7 +++++--
>>   1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
>> index a7ab087..943053d 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 +493,10 @@ 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);
>> +	else
> This 'else' is redundant here.
Ok.
>> +		return (void *)KSEG0ADDR(paddr);
>>   }
>>   
>>   /*
>> -- 
>> 1.9.1
>>
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>

-- 
Best Regards
Wills