diff options
| author | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> | 2018-07-26 15:15:44 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2018-07-30 18:46:19 +0200 |
| commit | 386177da9e601ed176d54c04324d9ebf44c70620 (patch) | |
| tree | c0cb9047afe65e8c1b4fc5156eec188927eaff79 /arch/arc | |
| parent | ARC: dma [non-IOC] setup SMP_CACHE_BYTES and cache_line_size (diff) | |
| download | linux-386177da9e601ed176d54c04324d9ebf44c70620.tar.xz linux-386177da9e601ed176d54c04324d9ebf44c70620.zip | |
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.c | 10 |
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(); |