Hi, York
On 7/28/2015 12:24 PM, York Sun wrote:
Please search the same name function in the same file.
yes, there still have flush_dcache_range() & invalidate_dcache_range()
function defined in case of DCACHE is enabled (CONFIG_SYS_DCACHE_OFF is
not defined).
And in that case, the empty weak functions flush_dcache_range() &
invalidate_dcache_range() in arch/arm/lib/cache.c will be ignored. It is
an expect behavior.
or did I miss something?
Best Regards,
Josh Wu
York
Sent from my cellphone
-------- Original message --------
From: Josh Wu
Date:07/27/2015 19:17 (GMT-08:00)
To: Sun York-R58495 , U-Boot Mailing List , Marek Vasut , Tom Rini
Cc: Masahiro Yamada , Jeroen Hofstee , Valentine Barshak , Simon Glass
, Thierry Reding , Masahiro Yamada , Heiko Schocher , Albert Aribaud ,
Nobuhiro Iwamatsu
Subject: Re: [PATCH v3 2/4] ARM: cache: add an empty stub function for
invalidate/flush dcache
Hi, York
On 7/28/2015 12:31 AM, York Sun wrote:
>
> On 07/26/2015 08:40 PM, Josh Wu wrote:
>> Since some driver like ohci, lcd used dcache functions. But some ARM
>> cpu don't implement the invalidate_dcache_range()/flush_dcache_range()
>> functions.
>>
>> To avoid compiling errors this patch adds an weak empty stub function
>> for all ARM cpu in arch/arm/lib/cache.c.
>> And ARM cpu still can implemnt its own cache functions on the cpu
folder.
>>
>> Signed-off-by: Josh Wu <josh...@atmel.com>
>> ---
>>
>> Changes in v3:
>> - remove the same functions in the cpu/ files as they will use the weak
>> function provided in lib/cache.c
>>
>> Changes in v2:
>> - new added.
>>
> <snip>
>
>> diff --git a/arch/arm/cpu/armv8/cache_v8.c
b/arch/arm/cpu/armv8/cache_v8.c
>> index c5ec529..f8c17cc 100644
>> --- a/arch/arm/cpu/armv8/cache_v8.c
>> +++ b/arch/arm/cpu/armv8/cache_v8.c
>> @@ -149,14 +149,6 @@ void flush_dcache_all(void)
>> {
>> }
>>
>> -void invalidate_dcache_range(unsigned long start, unsigned long stop)
>> -{
>> -}
>> -
>> -void flush_dcache_range(unsigned long start, unsigned long stop)
>> -{
>> -}
>> -
>> void dcache_enable(void)
>> {
>> }
> Are you sure about this change?
This patch deletes those above empty functions so that the driver will
use the same weak empty functions in arch/arm/lib/cache.c, which is
added by this patch as well.
> You are probably changing the wrong leg of the
> #if conditional code.
I don't think so. Could give me more details about this? Thanks.
Best Regards,
Josh Wu
>
> York
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