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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2018-07-26 16:15:44 +0300
committerVineet Gupta <vgupta@synopsys.com>2018-07-30 19:46:19 +0300
commit386177da9e601ed176d54c04324d9ebf44c70620 (patch)
treec0cb9047afe65e8c1b4fc5156eec188927eaff79 /arch/arc
parenteb2777397fd83a4a7eaa26984d09d3babb845d2a (diff)
downloadlinux-386177da9e601ed176d54c04324d9ebf44c70620.tar.xz
ARC: add SMP_CACHE_BYTES value validate
Check that SMP_CACHE_BYTES (and hence ARCH_DMA_MINALIGN) is larger or equal to any cache line length by comparing it with values previously read from ARC cache BCR registers. Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/mm/cache.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index 9dbe645ee127..b95365e1253a 100644
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -1246,6 +1246,16 @@ void __init arc_cache_init_master(void)
}
}
+ /*
+ * Check that SMP_CACHE_BYTES (and hence ARCH_DMA_MINALIGN) is larger
+ * or equal to any cache line length.
+ */
+ BUILD_BUG_ON_MSG(L1_CACHE_BYTES > SMP_CACHE_BYTES,
+ "SMP_CACHE_BYTES must be >= any cache line length");
+ if (is_isa_arcv2() && (l2_line_sz > SMP_CACHE_BYTES))
+ panic("L2 Cache line [%d] > kernel Config [%d]\n",
+ l2_line_sz, SMP_CACHE_BYTES);
+
/* Note that SLC disable not formally supported till HS 3.0 */
if (is_isa_arcv2() && l2_line_sz && !slc_enable)
arc_slc_disable();