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coresight-etm4x: Read only access to the main management registers

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Having access to the ETMv4 management registers is very useful as they
give meaningful information on how the IP block has been configured at
synthesis time.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier
2015-05-13 10:34:20 -06:00
committed by Greg Kroah-Hartman
parent 40d8ebf071
commit a467dae11d
2 changed files with 129 additions and 1 deletions
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53
drivers/hwtracing/coresight/coresight-etm4x.c
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@@ -2200,7 +2200,58 @@ static struct attribute *coresight_etmv4_attrs[] = {
&dev_attr_cpu.attr,
NULL,
};
ATTRIBUTE_GROUPS(coresight_etmv4);
#define coresight_simple_func(name, offset) \
static ssize_t name##_show(struct device *_dev, \
struct device_attribute *attr, char *buf) \
{ \
struct etmv4_drvdata *drvdata = dev_get_drvdata(_dev->parent); \
return scnprintf(buf, PAGE_SIZE, "0x%x\n", \
readl_relaxed(drvdata->base + offset)); \
} \
DEVICE_ATTR_RO(name)
coresight_simple_func(trcoslsr, TRCOSLSR);
coresight_simple_func(trcpdcr, TRCPDCR);
coresight_simple_func(trcpdsr, TRCPDSR);
coresight_simple_func(trclsr, TRCLSR);
coresight_simple_func(trcauthstatus, TRCAUTHSTATUS);
coresight_simple_func(trcdevid, TRCDEVID);
coresight_simple_func(trcdevtype, TRCDEVTYPE);
coresight_simple_func(trcpidr0, TRCPIDR0);
coresight_simple_func(trcpidr1, TRCPIDR1);
coresight_simple_func(trcpidr2, TRCPIDR2);
coresight_simple_func(trcpidr3, TRCPIDR3);
static struct attribute *coresight_etmv4_mgmt_attrs[] = {
&dev_attr_trcoslsr.attr,
&dev_attr_trcpdcr.attr,
&dev_attr_trcpdsr.attr,
&dev_attr_trclsr.attr,
&dev_attr_trcauthstatus.attr,
&dev_attr_trcdevid.attr,
&dev_attr_trcdevtype.attr,
&dev_attr_trcpidr0.attr,
&dev_attr_trcpidr1.attr,
&dev_attr_trcpidr2.attr,
&dev_attr_trcpidr3.attr,
NULL,
};
static const struct attribute_group coresight_etmv4_group = {
.attrs = coresight_etmv4_attrs,
};
static const struct attribute_group coresight_etmv4_mgmt_group = {
.attrs = coresight_etmv4_mgmt_attrs,
.name = "mgmt",
};
static const struct attribute_group *coresight_etmv4_groups[] = {
&coresight_etmv4_group,
&coresight_etmv4_mgmt_group,
NULL,
};
static void etm4_init_arch_data(void *info)
{