static enum cpuhp_state hp_online;
+struct etm4_init_arg {
+ struct etmv4_drvdata *drvdata;
+ struct csdev_access *csa;
+};
+
/*
* Check if TRCSSPCICRn(i) is implemented for a given instance.
*
.source_ops = &etm4_source_ops,
};
+static bool etm4_init_iomem_access(struct etmv4_drvdata *drvdata,
+ struct csdev_access *csa)
+{
+ *csa = CSDEV_ACCESS_IOMEM(drvdata->base);
+ return true;
+}
+
+static bool etm4_init_csdev_access(struct etmv4_drvdata *drvdata,
+ struct csdev_access *csa)
+{
+ if (drvdata->base)
+ return etm4_init_iomem_access(drvdata, csa);
+
+ return false;
+}
+
static void etm4_init_arch_data(void *info)
{
u32 etmidr0;
u32 etmidr3;
u32 etmidr4;
u32 etmidr5;
- struct etmv4_drvdata *drvdata = info;
- struct csdev_access tmp_csa = CSDEV_ACCESS_IOMEM(drvdata->base);
- struct csdev_access *csa = &tmp_csa;
+ struct etm4_init_arg *init_arg = info;
+ struct etmv4_drvdata *drvdata;
+ struct csdev_access *csa;
int i;
+ drvdata = init_arg->drvdata;
+ csa = init_arg->csa;
+
+ /*
+ * If we are unable to detect the access mechanism,
+ * or unable to detect the trace unit type, fail
+ * early.
+ */
+ if (!etm4_init_csdev_access(drvdata, csa))
+ return;
+
/* Make sure all registers are accessible */
etm4_os_unlock_csa(drvdata, csa);
etm4_cs_unlock(drvdata, csa);
struct etmv4_drvdata *drvdata;
struct resource *res = &adev->res;
struct coresight_desc desc = { 0 };
+ struct etm4_init_arg init_arg = { 0 };
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return PTR_ERR(base);
drvdata->base = base;
- desc.access = CSDEV_ACCESS_IOMEM(base);
spin_lock_init(&drvdata->spinlock);
if (!desc.name)
return -ENOMEM;
+ init_arg.drvdata = drvdata;
+ init_arg.csa = &desc.access;
+
if (smp_call_function_single(drvdata->cpu,
- etm4_init_arch_data, drvdata, 1))
+ etm4_init_arch_data, &init_arg, 1))
dev_err(dev, "ETM arch init failed\n");
if (etm4_arch_supported(drvdata->arch) == false)