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1/* SPDX-License-Identifier: BSD-3-Clause */2/*3 * Remote processor messaging4 *5 * Copyright (C) 2011-2020 Texas Instruments, Inc.6 * Copyright (C) 2011 Google, Inc.7 * All rights reserved.8 */9 10#ifndef _OMAP_RPMSG_H11#define _OMAP_RPMSG_H12 13/*14 * enum - Predefined Mailbox Messages15 *16 * @RP_MBOX_READY: informs the M3's that we're up and running. this is17 * part of the init sequence sent that the M3 expects to see immediately18 * after it is booted.19 *20 * @RP_MBOX_PENDING_MSG: informs the receiver that there is an inbound21 * message waiting in its own receive-side vring. please note that currently22 * this message is optional: alternatively, one can explicitly send the index23 * of the triggered virtqueue itself. the preferred approach will be decided24 * as we progress and experiment with those two different approaches.25 *26 * @RP_MBOX_CRASH: this message is sent if BIOS crashes27 *28 * @RP_MBOX_ECHO_REQUEST: a mailbox-level "ping" message.29 *30 * @RP_MBOX_ECHO_REPLY: a mailbox-level reply to a "ping"31 *32 * @RP_MBOX_ABORT_REQUEST: a "please crash" request, used for testing the33 * recovery mechanism (to some extent).34 *35 * @RP_MBOX_SUSPEND_AUTO: auto suspend request for the remote processor36 *37 * @RP_MBOX_SUSPEND_SYSTEM: system suspend request for the remote processor38 *39 * @RP_MBOX_SUSPEND_ACK: successful response from remote processor for a40 * suspend request41 *42 * @RP_MBOX_SUSPEND_CANCEL: a cancel suspend response from a remote processor43 * on a suspend request44 *45 * Introduce new message definitions if any here.46 *47 * @RP_MBOX_END_MSG: Indicates end of known/defined messages from remote core48 * This should be the last definition.49 *50 */51enum omap_rp_mbox_messages {52 RP_MBOX_READY = 0xFFFFFF00,53 RP_MBOX_PENDING_MSG = 0xFFFFFF01,54 RP_MBOX_CRASH = 0xFFFFFF02,55 RP_MBOX_ECHO_REQUEST = 0xFFFFFF03,56 RP_MBOX_ECHO_REPLY = 0xFFFFFF04,57 RP_MBOX_ABORT_REQUEST = 0xFFFFFF05,58 RP_MBOX_SUSPEND_AUTO = 0xFFFFFF10,59 RP_MBOX_SUSPEND_SYSTEM = 0xFFFFFF11,60 RP_MBOX_SUSPEND_ACK = 0xFFFFFF12,61 RP_MBOX_SUSPEND_CANCEL = 0xFFFFFF13,62 RP_MBOX_END_MSG = 0xFFFFFF14,63};64 65#endif /* _OMAP_RPMSG_H */66