1 /* SPDX-License-Identifier: BSD-3-Clause */ 2 /* 3 * Remote processor messaging 4 * 5 * Copyright (C) 2011-2020 Texas Instruments, Inc. 6 * Copyright (C) 2011 Google, Inc. 7 * All rights reserved. 8 */ 9 10 #ifndef _OMAP_RPMSG_H 11 #define _OMAP_RPMSG_H 12 13 /* 14 * enum - Predefined Mailbox Messages 15 * 16 * @RP_MBOX_READY: informs the M3's that we're up and running. this is 17 * part of the init sequence sent that the M3 expects to see immediately 18 * after it is booted. 19 * 20 * @RP_MBOX_PENDING_MSG: informs the receiver that there is an inbound 21 * message waiting in its own receive-side vring. please note that currently 22 * this message is optional: alternatively, one can explicitly send the index 23 * of the triggered virtqueue itself. the preferred approach will be decided 24 * as we progress and experiment with those two different approaches. 25 * 26 * @RP_MBOX_CRASH: this message is sent if BIOS crashes 27 * 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 the 33 * recovery mechanism (to some extent). 34 * 35 * @RP_MBOX_SUSPEND_AUTO: auto suspend request for the remote processor 36 * 37 * @RP_MBOX_SUSPEND_SYSTEM: system suspend request for the remote processor 38 * 39 * @RP_MBOX_SUSPEND_ACK: successful response from remote processor for a 40 * suspend request 41 * 42 * @RP_MBOX_SUSPEND_CANCEL: a cancel suspend response from a remote processor 43 * on a suspend request 44 * 45 * Introduce new message definitions if any here. 46 * 47 * @RP_MBOX_END_MSG: Indicates end of known/defined messages from remote core 48 * This should be the last definition. 49 * 50 */ 51 enum 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