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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#ifndef __DEBUG_H__
#define __DEBUG_H__
#include <linux/io.h>
#include <linux/serial_reg.h>
#define DEBUG_UART_BASE 0x54006800
#define UART_SHIFT 2
#define UNIPHIER_UART_TX 0
#define UNIPHIER_UART_LSR (5 * 4)
/* All functions are inline so that they can be called from .secure section. */
#ifdef DEBUG
static inline void debug_putc(int c)
{
void __iomem *base = (void __iomem *)DEBUG_UART_BASE;
while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE))
;
writel(c, base + UNIPHIER_UART_TX);
}
static inline void debug_puts(const char *s)
{
while (*s) {
if (*s == '\n')
debug_putc('\r');
debug_putc(*s++);
}
}
static inline void debug_puth(unsigned long val)
{
int i;
unsigned char c;
for (i = 8; i--; ) {
c = ((val >> (i * 4)) & 0xf);
c += (c >= 10) ? 'a' - 10 : '0';
debug_putc(c);
}
}
#else
static inline void debug_putc(int c)
{
}
static inline void debug_puts(const char *s)
{
}
static inline void debug_puth(unsigned long val)
{
}
#endif
#endif /* __DEBUG_H__ */
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