diff options
| author |   Mathieu Poirier <mathieu.poirier@linaro.org> | 2016-05-03 11:33:57 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-03 14:59:30 -0700 |
| commit | 4f1ff3de925d741b0b77c59bc1387cb940ad7c73 (patch) | |
| tree | d3e2d92f460276c89ce5136091baf78d0cbfd44b /drivers/hwtracing/coresight/coresight-tmc-etf.c | |
| parent | coresight: tmc: make sysFS and Perf mode mutually exclusive (diff) | |
| download | linux-dev-4f1ff3de925d741b0b77c59bc1387cb940ad7c73.tar.xz linux-dev-4f1ff3de925d741b0b77c59bc1387cb940ad7c73.zip | |
coresight: tmc: keep track of memory width
Accessing the HW configuration register each time the memory
width is needed simply doesn't make sense. It is much more
efficient to read the value once and keep a reference for
later use.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
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 | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index b11c52be54a9..ba3384781f71 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -41,25 +41,13 @@ void tmc_etb_enable_hw(struct tmc_drvdata *drvdata) static void tmc_etb_dump_hw(struct tmc_drvdata *drvdata) { - enum tmc_mem_intf_width memwidth; - u8 memwords; char *bufp; u32 read_data; int i; - memwidth = BMVAL(readl_relaxed(drvdata->base + CORESIGHT_DEVID), 8, 10); - if (memwidth == TMC_MEM_INTF_WIDTH_32BITS) - memwords = 1; - else if (memwidth == TMC_MEM_INTF_WIDTH_64BITS) - memwords = 2; - else if (memwidth == TMC_MEM_INTF_WIDTH_128BITS) - memwords = 4; - else - memwords = 8; - bufp = drvdata->buf; while (1) { - for (i = 0; i < memwords; i++) { + for (i = 0; i < drvdata->memwidth; i++) { read_data = readl_relaxed(drvdata->base + TMC_RRD); if (read_data == 0xFFFFFFFF) return; |