[PATCH 25/28] coresight: etm4x: adding range filter configuration function
From: mathieu.poirier@linaro.org (Mathieu Poirier)
Date: 2016-08-25 21:26:22
Also in:
lkml
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
Introducing a new function to do address range configuration generic enough to work for any address range and any comparator. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- drivers/hwtracing/coresight/coresight-etm4x.c | 56 ++++++++++++++++++--------- 1 file changed, 38 insertions(+), 18 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 04462fffe8e4..aca624010b9f 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c@@ -581,16 +581,10 @@ static void etm4_set_default_config(struct etmv4_config *config) config->vinst_ctrl |= BIT(0); } -static void etm4_set_default_filter(struct etmv4_config *config) +static void etm4_set_comparator_filter(struct etmv4_config *config, + u64 start, u64 stop, int comparator) { - u64 start, stop, access_type = 0; - - /* - * Configure address range comparator '0' to encompass all - * possible addresses. - */ - start = 0x0; - stop = ~0x0; + u64 access_type = 0; /* EXLEVEL_NS, bits[12:15], always stay away from hypervisor mode. */ access_type = ETM_EXLEVEL_NS_HYP;
@@ -604,20 +598,46 @@ static void etm4_set_default_filter(struct etmv4_config *config) ETM_EXLEVEL_S_HYP); /* First half of default address comparator */ - config->addr_val[ETM_DEFAULT_ADDR_COMP] = start; - config->addr_acc[ETM_DEFAULT_ADDR_COMP] = access_type; - config->addr_type[ETM_DEFAULT_ADDR_COMP] = ETM_ADDR_TYPE_RANGE; + config->addr_val[comparator] = start; + config->addr_acc[comparator] = access_type; + config->addr_type[comparator] = ETM_ADDR_TYPE_RANGE; /* Second half of default address comparator */ - config->addr_val[ETM_DEFAULT_ADDR_COMP + 1] = stop; - config->addr_acc[ETM_DEFAULT_ADDR_COMP + 1] = access_type; - config->addr_type[ETM_DEFAULT_ADDR_COMP + 1] = ETM_ADDR_TYPE_RANGE; + config->addr_val[comparator + 1] = stop; + config->addr_acc[comparator + 1] = access_type; + config->addr_type[comparator + 1] = ETM_ADDR_TYPE_RANGE; + + /* + * Configure the ViewInst function to include this address range + * comparator. + * + * @comparator is divided by two since it is the index in the + * etmv4_config::addr_val array but register TRCVIIECTLR deals with + * address range comparator _pairs_. + * + * Therefore: + * index 0 -> compatator pair 0 + * index 2 -> comparator pair 1 + * index 4 -> comparator pair 2 + * ... + * index 14 -> comparator pair 7 + */ + config->viiectlr |= BIT(comparator / 2); +} + +static void etm4_set_default_filter(struct etmv4_config *config) +{ + u64 start, stop; /* - * Configure the ViewInst function to filter on address range - * comparator '0'. + * Configure address range comparator '0' to encompass all + * possible addresses. */ - config->viiectlr = BIT(0); + start = 0x0; + stop = ~0x0; + + etm4_set_comparator_filter(config, start, stop, + ETM_DEFAULT_ADDR_COMP); /* * TRCVICTLR::SSSTATUS == 1, the start-stop logic is
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2.7.4