[MIPS] Use real cache invalidate

R10k non coherent machines need a real dma cache invalidate to get rid of
speculative stores in cache.  For other machines this promises a slight
speedup.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mm/c-r4k.c

@@ -589,7 +589,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
 		if (size >= scache_size)
 			r4k_blast_scache();
 		else
-			blast_scache_range(addr, addr + size);
+			blast_inv_scache_range(addr, addr + size);
 		return;
 	}
 
@@ -597,7 +597,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
 		r4k_blast_dcache();
 	} else {
 		R4600_HIT_CACHEOP_WAR_IMPL;
-		blast_dcache_range(addr, addr + size);
+		blast_inv_dcache_range(addr, addr + size);
 	}
 
 	bc_inv(addr, size);

include/asm-mips/r4kcache.h

@@ -403,6 +403,13 @@ __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
 
+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16)
+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64)
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128)
+
 /* build blast_xxx_range, protected_blast_xxx_range */
 #define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
 static inline void prot##blast_##pfx##cache##_range(unsigned long start, \