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coresight tmc etr: Cleanup AXICTL register handling 

This patch cleans up how we setup the AXICTL register on
TMC ETR. At the moment we don't set the CacheCtrl bits, which
drives the arcache and awcache bits on AXI bus specifying the
cacheablitiy. Set this to Write-back Read and Write-allocate.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Suzuki K Poulose 2017-08-02 10:22:14 -06:00 committed by Greg Kroah-Hartman
parent ff11f5bc5a
commit cd407abd5e
2 changed files with 19 additions and 8 deletions
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10
drivers/hwtracing/coresight/coresight-tmc-etr.c
View File

@ -36,13 +36,9 @@ static void tmc_etr_enable_hw(struct tmc_drvdata *drvdata)
writel_relaxed(TMC_MODE_CIRCULAR_BUFFER, drvdata->base + TMC_MODE);
axictl = readl_relaxed(drvdata->base + TMC_AXICTL);
axictl |= TMC_AXICTL_WR_BURST_16;
writel_relaxed(axictl, drvdata->base + TMC_AXICTL);
axictl &= ~TMC_AXICTL_SCT_GAT_MODE;
writel_relaxed(axictl, drvdata->base + TMC_AXICTL);
axictl = (axictl &
~(TMC_AXICTL_PROT_CTL_B0 | TMC_AXICTL_PROT_CTL_B1)) |
TMC_AXICTL_PROT_CTL_B1;
axictl &= ~TMC_AXICTL_CLEAR_MASK;
axictl |= (TMC_AXICTL_PROT_CTL_B1 | TMC_AXICTL_WR_BURST_16);
axictl |= TMC_AXICTL_AXCACHE_OS;
writel_relaxed(axictl, drvdata->base + TMC_AXICTL);
tmc_write_dba(drvdata, drvdata->paddr);

17
drivers/hwtracing/coresight/coresight-tmc.h
View File

@ -54,11 +54,26 @@
#define TMC_STS_TMCREADY_BIT 2
#define TMC_STS_FULL BIT(0)
#define TMC_STS_TRIGGERED BIT(1)
/* TMC_AXICTL - 0x110 */
/*
* TMC_AXICTL - 0x110
*
* TMC AXICTL format for SoC-400
* Bits [0-1] : ProtCtrlBit0-1
* Bits [2-5] : CacheCtrlBits 0-3 (AxCACHE)
* Bit 6 : Reserved
* Bit 7 : ScatterGatherMode
* Bits [8-11] : WrBurstLen
* Bits [12-31] : Reserved.
*/
#define TMC_AXICTL_CLEAR_MASK 0xfbf
#define TMC_AXICTL_PROT_CTL_B0 BIT(0)
#define TMC_AXICTL_PROT_CTL_B1 BIT(1)
#define TMC_AXICTL_SCT_GAT_MODE BIT(7)
#define TMC_AXICTL_WR_BURST_16 0xF00
/* Write-back Read and Write-allocate */
#define TMC_AXICTL_AXCACHE_OS (0xf << 2)
/* TMC_FFCR - 0x304 */
#define TMC_FFCR_FLUSHMAN_BIT 6
#define TMC_FFCR_EN_FMT BIT(0)