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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2012-2014, 2016, 2018, The Linux Foundation. All rights reserved.
*/
#ifndef __MSM_RTB_H__
#define __MSM_RTB_H__
/*
* These numbers are used from the kernel command line and sysfs
* to control filtering. Remove items from here with extreme caution.
*/
enum logk_event_type {
LOGK_NONE = 0,
LOGK_READL = 1,
LOGK_WRITEL = 2,
LOGK_LOGBUF = 3,
LOGK_HOTPLUG = 4,
LOGK_CTXID = 5,
LOGK_TIMESTAMP = 6,
LOGK_L2CPREAD = 7,
LOGK_L2CPWRITE = 8,
LOGK_IRQ = 9,
};
#define LOGTYPE_NOPC 0x80
struct msm_rtb_platform_data {
unsigned int size;
};
#if IS_ENABLED(CONFIG_QCOM_RTB)
/*
* returns 1 if data was logged, 0 otherwise
*/
int uncached_logk_pc(enum logk_event_type log_type, void *caller,
void *data);
/*
* returns 1 if data was logged, 0 otherwise
*/
int uncached_logk(enum logk_event_type log_type, void *data);
extern void set_uncached_logk_func(int (*fn)(enum logk_event_type, void *));
#define ETB_WAYPOINT do { \
BRANCH_TO_NEXT_ISTR; \
nop(); \
BRANCH_TO_NEXT_ISTR; \
nop(); \
} while (0)
#define BRANCH_TO_NEXT_ISTR \
do { \
asm volatile("b .+4\n" : : : "memory"); \
} while (0)
/*
* both the mb and the isb are needed to ensure enough waypoints for
* etb tracing
*/
#define LOG_BARRIER do { \
mb(); \
isb(); \
} while (0)
#else
static inline int uncached_logk_pc(enum logk_event_type log_type,
void *caller,
void *data) { return 0; }
static inline int uncached_logk(enum logk_event_type log_type,
void *data) { return 0; }
#define ETB_WAYPOINT
#define BRANCH_TO_NEXT_ISTR
/*
* Due to a GCC bug, we need to have a nop here in order to prevent an extra
* read from being generated after the write.
*/
#define LOG_BARRIER nop()
#endif
#endif
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