Release 4.7 drivers/hwtracing/coresight/coresight-priv.h

/* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _CORESIGHT_PRIV_H

#define _CORESIGHT_PRIV_H

#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/coresight.h>

/*
 * Coresight management registers (0xf00-0xfcc)
 * 0xfa0 - 0xfa4: Management    registers in PFTv1.0
 *                Trace         registers in PFTv1.1
 */

#define CORESIGHT_ITCTRL	0xf00

#define CORESIGHT_CLAIMSET	0xfa0

#define CORESIGHT_CLAIMCLR	0xfa4

#define CORESIGHT_LAR		0xfb0

#define CORESIGHT_LSR		0xfb4

#define CORESIGHT_AUTHSTATUS	0xfb8

#define CORESIGHT_DEVID		0xfc8

#define CORESIGHT_DEVTYPE	0xfcc


#define TIMEOUT_US		100

#define BMVAL(val, lsb, msb)	((val & GENMASK(msb, lsb)) >> lsb)


#define ETM_MODE_EXCL_KERN	BIT(30)

#define ETM_MODE_EXCL_USER	BIT(31)


#define coresight_simple_func(type, name, offset)			\
static ssize_t name##_show(struct device *_dev,                         \
                           struct device_attribute *attr, char *buf)    \
{                                                                       \
        type *drvdata = dev_get_drvdata(_dev->parent);                  \
        return scnprintf(buf, PAGE_SIZE, "0x%x\n",                      \
                         readl_relaxed(drvdata->base + offset));        \
}                                                                       \
static DEVICE_ATTR_RO(name)


enum cs_mode {
	
CS_MODE_DISABLED,
	
CS_MODE_SYSFS,
	
CS_MODE_PERF,
};

/**
 * struct cs_buffer - keep track of a recording session' specifics
 * @cur:        index of the current buffer
 * @nr_pages:   max number of pages granted to us
 * @offset:     offset within the current buffer
 * @data_size:  how much we collected in this run
 * @lost:       other than zero if we had a HW buffer wrap around
 * @snapshot:   is this run in snapshot mode
 * @data_pages: a handle the ring buffer
 */

struct cs_buffers {
	
unsigned int		cur;
	
unsigned int		nr_pages;
	
unsigned long		offset;
	
local_t			data_size;
	
local_t			lost;
	
bool			snapshot;
	
void			**data_pages;
};



static inline void CS_LOCK(void __iomem *addr)
{
	do {
		/* Wait for things to settle */
		mb();
		writel_relaxed(0x0, addr + CORESIGHT_LAR);
	} while (0);
}

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static inline void CS_UNLOCK(void __iomem *addr)
{
	do {
		writel_relaxed(CORESIGHT_UNLOCK, addr + CORESIGHT_LAR);
		/* Make sure everyone has seen this */
		mb();
	} while (0);
}

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void coresight_disable_path(struct list_head *path);
int coresight_enable_path(struct list_head *path, u32 mode);
struct coresight_device *coresight_get_sink(struct list_head *path);
struct list_head *coresight_build_path(struct coresight_device *csdev);
void coresight_release_path(struct list_head *path);

#ifdef CONFIG_CORESIGHT_SOURCE_ETM3X
extern int etm_readl_cp14(u32 off, unsigned int *val);
extern int etm_writel_cp14(u32 off, u32 val);
#else


static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; }
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static inline int etm_writel_cp14(u32 off, u32 val) { return 0; }
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#endif

#endif
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Directory: drivers/hwtracing/coresight

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