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hw/cxl/component: Add utils for interleave parameter encoding/decoding

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Both registers and the CFMWS entries in CDAT use simple encodings
for the number of interleave ways and the interleave granularity.
Introduce simple conversion functions to/from the unencoded
number / size.  So far the iw decode has not been needed so is
it not implemented.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220429144110.25167-27-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jonathan Cameron 2022-04-29 15:40:51 +01:00 • committed by Michael S. Tsirkin
parent 3d6a69b6eb
commit 829de299d1
2 changed files with 42 additions and 0 deletions
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8
include/hw/cxl/cxl_component.h
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@ -210,4 +210,12 @@ static inline int cxl_decoder_count_enc(int count)
return 0;
}
uint8_t cxl_interleave_ways_enc(int iw, Error **errp);
uint8_t cxl_interleave_granularity_enc(uint64_t gran, Error **errp);
static inline hwaddr cxl_decode_ig(int ig)
{
return 1 << (ig + 8);
}
#endif