common.h

/* SPDX-License-Identifier: Apache-2.0 */
/* Copyright (C) 2018 IBM Corp. */
#ifndef COMMON_H
#define COMMON_H

#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <syslog.h>

#ifndef PREFIX
#define PREFIX ""
#endif

enum verbose {
	MBOX_LOG_NONE = 0,
	MBOX_LOG_INFO = 1,
	MBOX_LOG_DEBUG = 2
};

extern enum verbose verbosity;

/* Error Messages */
#define MSG_ERR(f_, ...)						\
do {									\
	mbox_log(LOG_ERR, f_, ##__VA_ARGS__);				\
} while (0)

/* Informational Messages */
#define MSG_INFO(f_, ...) 						\
do { 									\
	if (verbosity >= MBOX_LOG_INFO) { 				\
		mbox_log(LOG_INFO, f_, ##__VA_ARGS__);			\
	}								\
} while (0)

/* Debug Messages */
#define MSG_DBG(f_, ...)						\
do { 									\
	if (verbosity >= MBOX_LOG_DEBUG) {				\
		mbox_log(LOG_DEBUG, f_, ##__VA_ARGS__);			\
	}								\
} while(0)

extern void (*mbox_vlog)(int p, const char *fmt, va_list args);

#ifdef __cplusplus
extern "C" {
#endif

void mbox_log_console(int p, const char *fmt, va_list args);

__attribute__((format(printf, 2, 3)))
void mbox_log(int p, const char *fmt, ...);

uint16_t get_u16(uint8_t *ptr);

void put_u16(uint8_t *ptr, uint16_t val);

uint32_t get_u32(uint8_t *ptr);

void put_u32(uint8_t *ptr, uint32_t val);

static inline uint32_t align_up(uint32_t val, uint32_t size)
{
	return (((val) + (size) - 1) & ~((size) - 1));
}

static inline uint32_t align_down(uint32_t val, uint32_t size)
{
	return ((val) & ~(((size) - 1)));
}

static inline uint32_t min_u32(uint32_t a, uint32_t b)
{
	if (a <= b) {
		return a;
	}

	return b;
}

static inline int log_2(int val)
{
	int ret = 0;

	if (val <= 0) {
		return -1;
	}

	while (val >>= 1) {
		ret++;
	}

	return ret;
}

static inline bool is_power_of_2(unsigned val)
{
	return __builtin_popcount(val) == 1;
}

char *get_dev_mtd(void);

#ifdef __cplusplus
}
#endif

#endif /* COMMON_H */