2018-05-06 21:58:06 +00:00
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/* SPDX-License-Identifier: GPL-2.0+ */
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2016-08-10 07:08:49 +00:00
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/*
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* Copyright (C) 2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*/
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#ifndef __DEBUG_H__
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#define __DEBUG_H__
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#include <linux/io.h>
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#include <linux/serial_reg.h>
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#define DEBUG_UART_BASE 0x54006800
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#define UART_SHIFT 2
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#define UNIPHIER_UART_TX 0
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#define UNIPHIER_UART_LSR (5 * 4)
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/* All functions are inline so that they can be called from .secure section. */
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#ifdef DEBUG
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static inline void debug_putc(int c)
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{
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void __iomem *base = (void __iomem *)DEBUG_UART_BASE;
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while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE))
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;
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writel(c, base + UNIPHIER_UART_TX);
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}
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static inline void debug_puts(const char *s)
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{
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while (*s) {
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if (*s == '\n')
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debug_putc('\r');
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debug_putc(*s++);
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}
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}
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static inline void debug_puth(unsigned long val)
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{
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int i;
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unsigned char c;
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for (i = 8; i--; ) {
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c = ((val >> (i * 4)) & 0xf);
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c += (c >= 10) ? 'a' - 10 : '0';
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debug_putc(c);
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}
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}
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#else
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static inline void debug_putc(int c)
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{
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}
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static inline void debug_puts(const char *s)
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{
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}
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static inline void debug_puth(unsigned long val)
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{
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}
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#endif
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#endif /* __DEBUG_H__ */
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