/* SPDX-License-Identifier: BSD-3-Clause

*

* Copyright(c) 2019 Intel Corporation. All rights reserved.

*

* Author: Marcin Rajwa <marcin.rajwa@linux.intel.com>

*/

#ifndef __SOF_DEBUG_GDB_RINGBUFFER_H__

#define __SOF_DEBUG_GDB_RINGBUFFER_H__

#include <sof/lib/mailbox.h>

#define RING_SIZE 128

#define DEBUG_RX_BASE (mailbox_get_debug_base())

#define DEBUG_TX_BASE (mailbox_get_debug_base() + 0x100)

unsigned char get_debug_char(void);

void put_debug_char(unsigned char c);

void put_exception_char(char c);

void init_buffers(void);

struct ring {

unsigned char head;

unsigned char fill1[63];

unsigned char tail;

unsigned char fill2[63];

unsigned char data[RING_SIZE];

};

static inline unsigned int ring_next_head(const volatile struct ring *ring)

{

return (ring->head + 1) & (RING_SIZE - 1);

}

static inline unsigned int ring_next_tail(const volatile struct ring *ring)

{

return (ring->tail + 1) & (RING_SIZE - 1);

}

static inline int ring_have_space(const volatile struct ring *ring)

{

return ring_next_head(ring) != ring->tail;

}

static inline int ring_have_data(const volatile struct ring *ring)

{

return ring->head != ring->tail;

}

#endif /* __SOF_DEBUG_GDB_RINGBUFFER_H__ */