| /*************************************************************************** |
| * __________ __ ___. |
| * 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 PCM_SIZE 32768 /* bytes */ |
| |
| struct sdram_buffer { |
| unsigned long addr; |
| unsigned short bytes; |
| } PACKED; |
| |
| #define SDRAM_BUFFERS 4 |
| |
| 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 |