[PATCH v3 17/18] coresight tmc: Add support for Coresight SoC 600 TMC

From: Suzuki K Poulose
Date: Fri Jul 14 2017 - 09:05:55 EST


The coresight SoC 600 supports ETR save-restore which allows us
to restore a trace session by retaining the RRP/RWP/STS.Full values
when the TMC leaves the Disabled state. However, the TMC doesn't
have a scatter-gather unit in built.

Also, TMCs have different PIDs in different configurations (ETF,
ETB & ETR), unlike the previous generation.

While the DEVID exposes some of the features/changes in the TMC,
it doesn't explicitly advertises the new save-restore feature
as described above.

Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
drivers/hwtracing/coresight/coresight-tmc.c | 16 ++++++++++++++++
drivers/hwtracing/coresight/coresight-tmc.h | 4 ++++
2 files changed, 20 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 32e88ec..bf4970d 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -440,6 +440,22 @@ static struct amba_id tmc_ids[] = {
.id = 0x000bb961,
.mask = 0x000fffff,
},
+ {
+ /* Coresight SoC 600 TMC-ETR/ETS */
+ .id = 0x000bb9e8,
+ .mask = 0x000fffff,
+ .data = (void *)(unsigned long)CORESIGHT_SOC_600_ETR_CAPS,
+ },
+ {
+ /* Coresight SoC 600 TMC-ETB */
+ .id = 0x000bb9e9,
+ .mask = 0x000fffff,
+ },
+ {
+ /* Coresight SoC 600 TMC-ETF */
+ .id = 0x000bb9ea,
+ .mask = 0x000fffff,
+ },
{ 0, 0},
};

diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 5032d8e..503c219 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -131,6 +131,10 @@ enum tmc_mem_intf_width {
*/
#define TMC_ETR_SAVE_RESTORE (0x1U << 2)

+/* Coresight SoC-600 TMC-ETR unadvertised capabilities */
+#define CORESIGHT_SOC_600_ETR_CAPS \
+ (TMC_ETR_SAVE_RESTORE | TMC_ETR_AXI_ARCACHE)
+
/**
* struct tmc_drvdata - specifics associated to an TMC component
* @base: memory mapped base address for this component.
--
2.7.5