drivers/remoteproc/omap_remoteproc.h

   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 */