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lxdream.org :: lxdream/test/dma.h
lxdream 0.9.1
released Jun 29
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filename test/dma.h
changeset 561:533f6b478071
prev185:6755a04c447f
next812:8cc61d5ea1f8
author nkeynes
date Thu Jul 24 07:27:48 2008 +0000 (11 years ago)
permissions -rw-r--r--
last change Halt emulation after reporting an error
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     1 /**
     2  * $Id$
     3  * 
     4  * DMA support code
     5  *
     6  * Copyright (c) 2006 Nathan Keynes.
     7  *
     8  * This program is free software; you can redistribute it and/or modify
     9  * it under the terms of the GNU General Public License as published by
    10  * the Free Software Foundation; either version 2 of the License, or
    11  * (at your option) any later version.
    12  *
    13  * This program is distributed in the hope that it will be useful,
    14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16  * GNU General Public License for more details.
    17  */
    19 #include "lib.h"
    21 /**
    22  * Setup the DMAC for a transfer. Assumes 32-byte block transfer.
    23  * Caller is responsible for making sure no-one else is using the
    24  * channel already. 
    25  *
    26  * @param channel DMA channel to use, 0 to 3
    27  * @param source source address (if a memory source)
    28  * @param dest   destination address (if a memory destination)
    29  * @param length number of bytes to transfer (must be a multiple of
    30  *               32.
    31  * @param direction 0 = host to device, 1 = device to host
    32  */
    33 void dmac_prepare_channel( int channel, uint32_t source, uint32_t dest,
    34 			   uint32_t length, int direction );
    36 /**
    37  * Transfer data to the PVR via DMA. Target address should be
    38  * 0x10000000 for the TA, and 0x11000000 + VRAM address for VRAM.
    39  *
    40  * @param target Target address
    41  * @param buf    Data to write (must be 32-byte aligned)
    42  * @param length Size of data to write, in bytes.
    43  * @param region Target region for VRAM writes, 0 for 64-byte region, 1 for 32-byte region.
    44  *
    45  * @return 0 on success, non-zero on failure.
    46  */
    47 int pvr_dma_write( unsigned int target, char *buf, int length, int region );
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