Re: [PATCH 4/4] msm: scm: Get cacheline size from CTR
From: Stephen Boyd
Date: Thu Feb 24 2011 - 14:50:56 EST
On 02/24/2011 11:32 AM, Sergei Shtylyov wrote:
> Stephen Boyd wrote:
>> @@ -207,6 +204,14 @@ static int __scm_call(const struct scm_command
>> return ret;
>> +static inline u32 dcache_line_size(void)
>> + u32 ctr;
>> + asm volatile("mrc p15, 0, %0, c0, c0, 1" : "=r" (ctr));
>> + return 4 << ((ctr >> 16) & 0xf);
> Won't generic cache_line_size() macro do instead? It's defined as
Interesting. It would be the same value (32) but I'm not sure how
multi-platform friendly that will be since L1_CACHE_BYTES is (1 <<
CONFIG_ARM_L1_CACHE_SHIFT). I suppose we can punt supporting platforms
with different cache line sizes in one kernel for another day.
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/