drivers/hwtracing/coresight/coresight-trbe.h

Source file repositories/reference/linux-study-clean/drivers/hwtracing/coresight/coresight-trbe.h

File Facts

System
Linux kernel
Corpus path
drivers/hwtracing/coresight/coresight-trbe.h
Extension
.h
Size
3125 bytes
Lines
140
Domain
Driver Families
Bucket
drivers/hwtracing
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/acpi.h>
#include <linux/coresight.h>
#include <linux/device.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
#include <linux/smp.h>

#include "coresight-etm-perf.h"

static inline bool is_trbe_available(void)
{
	u64 aa64dfr0 = read_sysreg_s(SYS_ID_AA64DFR0_EL1);
	unsigned int trbe = cpuid_feature_extract_unsigned_field(aa64dfr0,
								 ID_AA64DFR0_EL1_TraceBuffer_SHIFT);

	return trbe >= ID_AA64DFR0_EL1_TraceBuffer_IMP;
}

static inline bool is_trbe_enabled(void)
{
	u64 trblimitr = read_sysreg_s(SYS_TRBLIMITR_EL1);

	return trblimitr & TRBLIMITR_EL1_E;
}

#define TRBE_EC_OTHERS		0
#define TRBE_EC_STAGE1_ABORT	36
#define TRBE_EC_STAGE2_ABORT	37

static inline int get_trbe_ec(u64 trbsr)
{
	return (trbsr & TRBSR_EL1_EC_MASK) >> TRBSR_EL1_EC_SHIFT;
}

#define TRBE_BSC_NOT_STOPPED 0
#define TRBE_BSC_FILLED      1
#define TRBE_BSC_TRIGGERED   2

static inline int get_trbe_bsc(u64 trbsr)
{
	return (trbsr & TRBSR_EL1_BSC_MASK) >> TRBSR_EL1_BSC_SHIFT;
}

static inline void clr_trbe_irq(void)
{
	u64 trbsr = read_sysreg_s(SYS_TRBSR_EL1);

	trbsr &= ~TRBSR_EL1_IRQ;
	write_sysreg_s(trbsr, SYS_TRBSR_EL1);
}

static inline bool is_trbe_irq(u64 trbsr)
{
	return trbsr & TRBSR_EL1_IRQ;
}

static inline bool is_trbe_trg(u64 trbsr)
{
	return trbsr & TRBSR_EL1_TRG;
}

static inline bool is_trbe_wrap(u64 trbsr)
{
	return trbsr & TRBSR_EL1_WRAP;
}

static inline bool is_trbe_abort(u64 trbsr)
{
	return trbsr & TRBSR_EL1_EA;
}

static inline bool is_trbe_running(u64 trbsr)
{
	return !(trbsr & TRBSR_EL1_S);
}

static inline bool get_trbe_flag_update(u64 trbidr)
{
	return trbidr & TRBIDR_EL1_F;
}

static inline bool is_trbe_programmable(u64 trbidr)
{
	return !(trbidr & TRBIDR_EL1_P);
}

static inline int get_trbe_address_align(u64 trbidr)

Annotation

Implementation Notes