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| author |   Mathieu Poirier <mathieu.poirier@linaro.org> | 2019-08-29 14:28:40 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-03 22:01:18 +0200 |
| commit | 00bb485ce7b8d1186a5166fc9e38822797fae7d4 (patch) | |
| tree | 964c0c8ac737e0028afa53b74d0ec3418ae77fd3 /drivers/hwtracing/coresight/coresight-tmc-etf.c | |
| parent | coresight: tmc-etr: Fix perf_data check (diff) | |
| download | linux-dev-00bb485ce7b8d1186a5166fc9e38822797fae7d4.tar.xz linux-dev-00bb485ce7b8d1186a5166fc9e38822797fae7d4.zip | |
coresight: tmc: Make memory width mask computation into a function
Make the computation of a memory mask representing the width of the memory
bus into a function so that it can be re-used by the ETR driver.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Link: https://lore.kernel.org/r/20190829202842.580-16-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-tmc-etf.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-etf.c | 23 |
1 files changed, 2 insertions, 21 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index 23b7ff00af5c..807416b75ecc 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -479,30 +479,11 @@ static unsigned long tmc_update_etf_buffer(struct coresight_device *csdev, * traces. */ if (!buf->snapshot && to_read > handle->size) { - u32 mask = 0; - - /* - * The value written to RRP must be byte-address aligned to - * the width of the trace memory databus _and_ to a frame - * boundary (16 byte), whichever is the biggest. For example, - * for 32-bit, 64-bit and 128-bit wide trace memory, the four - * LSBs must be 0s. For 256-bit wide trace memory, the five - * LSBs must be 0s. - */ - switch (drvdata->memwidth) { - case TMC_MEM_INTF_WIDTH_32BITS: - case TMC_MEM_INTF_WIDTH_64BITS: - case TMC_MEM_INTF_WIDTH_128BITS: - mask = GENMASK(31, 4); - break; - case TMC_MEM_INTF_WIDTH_256BITS: - mask = GENMASK(31, 5); - break; - } + u32 mask = tmc_get_memwidth_mask(drvdata); /* * Make sure the new size is aligned in accordance with the - * requirement explained above. + * requirement explained in function tmc_get_memwidth_mask(). */ to_read = handle->size & mask; /* Move the RAM read pointer up */ |