/*
 * mailbox: interprocessor communication module
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef MAILBOX_H
#define MAILBOX_H

struct mailbox;

typedef int __bitwise mailbox_irq_t;
#define IRQ_TX ((__force mailbox_irq_t) 1)
#define IRQ_RX ((__force mailbox_irq_t) 2)

struct mailbox_msg {
	int		size;
	u32		header;
	void		*pdata;
};

#define MAILBOX_FILL_MSG(_msg, _header, _pdata, _size) { \
	_msg.header = _header; \
	_msg.pdata = (void *)_pdata; \
	_msg.size = _size; \
}

int mailbox_msg_send(struct mailbox *, struct mailbox_msg *msg);
struct mailbox_msg *mailbox_msg_send_receive_no_irq(struct mailbox *,
		struct mailbox_msg *msg);
int mailbox_msg_send_no_irq(struct mailbox *, struct mailbox_msg *msg);

struct mailbox *mailbox_get(const char *, struct notifier_block *nb);
void mailbox_put(struct mailbox *mbox, struct notifier_block *nb);

void mailbox_save_ctx(struct mailbox *mbox);
void mailbox_restore_ctx(struct mailbox *mbox);
void mailbox_enable_irq(struct mailbox *mbox, mailbox_irq_t irq);
void mailbox_disable_irq(struct mailbox *mbox, mailbox_irq_t irq);

#endif /* MAILBOX_H */