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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Catalin Patulea
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef IPC_H
#define IPC_H
/* Inter-Processor Communication */
/* Meant to be included by both DSP and ARM code. */
#ifdef __GNUC__
/* aligned(2) is VERY IMPORTANT. It ensures gcc generates code with "STRH"
instead of with "STRB". STRB in the DSP memory range is broken because
the HPI is in 16-bit mode. */
#define PACKED __attribute__((packed)) __attribute__((aligned (2)))
#else
#define PACKED
#endif
/* Define this if you want to use debugf on the DSP. This consumes quite a bit
* of space so it is disabled by default. */
/* #define HAVE_DEBUG */
struct sdram_buffer {
unsigned long addr;
unsigned short bytes;
} PACKED;
struct ipc_message {
unsigned short msg;
union {
#define MSG_INIT 1
struct msg_init {
unsigned short sdem_addrl;
unsigned short sdem_addrh;
} init PACKED;
#define MSG_DEBUGF 2
struct {
short buffer[80];
} debugf PACKED;
#define MSG_REFILL 3
struct {
unsigned short topbottom; /* byte offset to unlocked half-buffer */
unsigned short _DMA_TRG;
unsigned short _SDEM_ADDRH;
unsigned short _SDEM_ADDRL;
unsigned short _DSP_ADDRH;
unsigned short _DSP_ADDRL;
unsigned short _DMA_SIZE;
} refill PACKED;
} payload PACKED;
} PACKED;
#endif
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