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MIPS: c-r4k: Split r4k_flush_kernel_vmap_range() 

Split the operation of r4k_flush_kernel_vmap_range() into separate
SMP callbacks for the indexed cache flush and hit cache flush cases,
since the logic to determine which to use can be determined by the
initiating CPU prior to doing any SMP calls.

This will help when we change r4k_on_each_cpu() to distinguish indexed
and hit cache ops in a later patch, preventing globalized hit cache ops
being performed redundantly on multiple CPUs.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13806/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
James Hogan 2016-07-13 14:12:53 +01:00 committed by Ralf Baechle
parent 640511ae92
commit a9341ae241
1 changed files with 17 additions and 8 deletions
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25
arch/mips/mm/c-r4k.c
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@ -978,6 +978,15 @@ struct flush_kernel_vmap_range_args {
int size;
};
static inline void local_r4k_flush_kernel_vmap_range_index(void *args)
{
/*
* Aliases only affect the primary caches so don't bother with
* S-caches or T-caches.
*/
r4k_blast_dcache();
}
static inline void local_r4k_flush_kernel_vmap_range(void *args)
{
struct flush_kernel_vmap_range_args *vmra = args;
@ -988,12 +997,8 @@ static inline void local_r4k_flush_kernel_vmap_range(void *args)
* Aliases only affect the primary caches so don't bother with
* S-caches or T-caches.
*/
if (size >= dcache_size)
r4k_blast_dcache();
else {
R4600_HIT_CACHEOP_WAR_IMPL;
blast_dcache_range(vaddr, vaddr + size);
}
R4600_HIT_CACHEOP_WAR_IMPL;
blast_dcache_range(vaddr, vaddr + size);
}
static void r4k_flush_kernel_vmap_range(unsigned long vaddr, int size)
@ -1003,8 +1008,12 @@ static void r4k_flush_kernel_vmap_range(unsigned long vaddr, int size)
args.vaddr = (unsigned long) vaddr;
args.size = size;
r4k_on_each_cpu(R4K_HIT | R4K_INDEX, local_r4k_flush_kernel_vmap_range,
&args);
if (size >= dcache_size)
r4k_on_each_cpu(R4K_INDEX,
local_r4k_flush_kernel_vmap_range_index, NULL);
else
r4k_on_each_cpu(R4K_HIT, local_r4k_flush_kernel_vmap_range,
&args);
}
static inline void rm7k_erratum31(void)