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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2017-08-02 10:22:13 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 16:05:49 +0200 |
| commit | ff11f5bc5a42f2cfc9705481eedf1b4d470ade2c (patch) | |
| tree | a3d15c9886f66e0d152c5ca60c4546a019e29aab /drivers/hwtracing/coresight/coresight-tmc.h | |
| parent | 2e21934568c0f9fcd2e01060007506a74d49152b (diff) | |
| download | lwn-ff11f5bc5a42f2cfc9705481eedf1b4d470ade2c.tar.gz lwn-ff11f5bc5a42f2cfc9705481eedf1b4d470ade2c.zip | |
coresight tmc etr: Detect address width at runtime
TMC in Coresight SoC-600 advertises the AXI address width
in the device configuration register.
Bit 16 - AXIAW_VALID
0 - AXI Address Width not valid
1 - Valid AXI Address width in Bits[23-17]
Bits [23-17] - AXIAW. If AXIAW_VALID = b01 then
0x20 - 32bit AXI address bus
0x28 - 40bit AXI address bus
0x2c - 44bit AXI address bus
0x30 - 48bit AXI address bus
0x34 - 52bit AXI address bus
Use the address bits from the device configuration register, if
available. Otherwise, default to 40bit.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Robin Murphy <robin.murphy@arm.com>
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>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-tmc.h')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h index bb6a3e3314b8..f55203d48673 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.h +++ b/drivers/hwtracing/coresight/coresight-tmc.h @@ -71,6 +71,10 @@ #define TMC_DEVID_NOSCAT BIT(24) +#define TMC_DEVID_AXIAW_VALID BIT(16) +#define TMC_DEVID_AXIAW_SHIFT 17 +#define TMC_DEVID_AXIAW_MASK 0x7f + enum tmc_config_type { TMC_CONFIG_TYPE_ETB, TMC_CONFIG_TYPE_ETR, |