include/linux/amlogic/aml_iotrace.h

/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
/*
 * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
 */

#ifndef __AML_IOTRACE_H
#define __AML_IOTRACE_H

extern int ramoops_io_skip;
extern int ramoops_io_en;
extern int ramoops_trace_mask;
extern int meson_clk_debug;
extern int meson_pd_debug;

void notrace __nocfi pstore_io_save(unsigned long reg, unsigned long val, unsigned int flag,
							unsigned long *irq_flags);

#define PSTORE_FLAG_IO_R		0x0
#define PSTORE_FLAG_IO_W		0x1
#define PSTORE_FLAG_IO_R_END	0x2
#define PSTORE_FLAG_IO_W_END	0x3

#if (IS_ENABLED(CONFIG_AMLOGIC_DEBUG_IOTRACE)) && (!defined SKIP_IO_TRACE)
#define pstore_ftrace_io_wr(reg, val)	\
unsigned long irqflg;					\
pstore_io_save(reg, val, PSTORE_FLAG_IO_W, &irqflg)

#define pstore_ftrace_io_wr_end(reg, val)	\
pstore_io_save(reg, val, PSTORE_FLAG_IO_W_END, &irqflg)

#define pstore_ftrace_io_rd(reg)		\
unsigned long irqflg;					\
pstore_io_save(reg, 0, PSTORE_FLAG_IO_R, &irqflg)

#define pstore_ftrace_io_rd_end(reg)	\
pstore_io_save(reg, 0, PSTORE_FLAG_IO_R_END, &irqflg)

#else
#define pstore_ftrace_io_wr(reg, val)                   do {    } while (0)
#define pstore_ftrace_io_rd(reg)                        do {    } while (0)
#define pstore_ftrace_io_wr_end(reg, val)               do {    } while (0)
#define pstore_ftrace_io_rd_end(reg)                    do {    } while (0)
#define pstore_ftrace_io_tag(reg, val)                  do {    } while (0)

#endif /*CONFIG_AMLOGIC_DEBUG_IOTRACE && !SKIP_IO_TRACE */

enum aml_pstore_type_id {
	AML_PSTORE_TYPE_IO      = 0,
	AML_PSTORE_TYPE_SCHED   = 1,
	AML_PSTORE_TYPE_IRQ     = 2,
	AML_PSTORE_TYPE_SMC     = 3,
	AML_PSTORE_TYPE_MISC    = 4,
	AML_PSTORE_TYPE_MAX
};

struct io_trace_data {
	unsigned int reg;
	unsigned int val;
	union {
		struct {
			unsigned long flag:2;
			unsigned long :0;
		};
		unsigned long ip;
	};
	unsigned long parent_ip;
};

void aml_pstore_write(enum aml_pstore_type_id type, char *buf, unsigned long size);

int ftrace_ramoops_init(void);
#endif