30c3382a48
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23817 a1c6a512-1295-4272-9138-f99709370657
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Catalin Patulea
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef IPC_H
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#define IPC_H
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/* Inter-Processor Communication */
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/* Meant to be included by both DSP and ARM code. */
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#ifdef __GNUC__
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/* aligned(2) is VERY IMPORTANT. It ensures gcc generates code with "STRH"
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instead of with "STRB". STRB in the DSP memory range is broken because
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the HPI is in 16-bit mode. */
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#define PACKED __attribute__((packed)) __attribute__((aligned (2)))
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#else
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#define PACKED
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#endif
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/* Define this if you want to use debugf on the DSP. This consumes quite a bit
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* of space so it is disabled by default. */
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/* #define HAVE_DEBUG */
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struct sdram_buffer {
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unsigned long addr;
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unsigned short bytes;
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} PACKED;
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struct ipc_message {
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unsigned short msg;
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union {
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#define MSG_INIT 1
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struct msg_init {
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unsigned short sdem_addrl;
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unsigned short sdem_addrh;
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} init PACKED;
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#define MSG_DEBUGF 2
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struct {
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short buffer[80];
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} debugf PACKED;
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#define MSG_REFILL 3
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struct {
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unsigned short topbottom; /* byte offset to unlocked half-buffer */
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unsigned short _DMA_TRG;
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unsigned short _SDEM_ADDRH;
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unsigned short _SDEM_ADDRL;
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unsigned short _DSP_ADDRH;
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unsigned short _DSP_ADDRL;
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unsigned short _DMA_SIZE;
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} refill PACKED;
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} payload PACKED;
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} PACKED;
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#endif
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