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/* dma.h -- Definition of types and structures for DMA
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/* dma.h -- Definition of DMA<->peripheral interface
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Copyright (C) 2001 by Erez Volk, erez@opencores.org
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Copyright (C) 2001 by Erez Volk, erez@opencores.org
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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*/
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#include "dma_defs.h"
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#include "dma_defs.h"
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/* Exported function prototypes */
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void dma_reset( void );
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void dma_clock( void );
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void dma_status( void );
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void set_dma_req_i( unsigned dma_controller, unsigned channel );
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void clear_dma_req_i( unsigned dma_controller, unsigned channel );
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void set_dma_nd_i( unsigned dma_controller, unsigned channel );
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void clear_dma_nd_i( unsigned dma_controller, unsigned channel );
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unsigned check_dma_ack_o( unsigned dma_controller, unsigned channel );
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/* Implementation of DMA Channel Registers and State */
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/* Implementation of DMA Channel Registers and State */
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struct dma_channel
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struct dma_channel
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{
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{
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/* The controller we belong to */
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/* The controller we belong to */
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struct dma_controller *controller;
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struct dma_controller *controller;
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unsigned referenced;
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unsigned referenced;
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/* Inner state of transfer etc. */
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/* Inner state of transfer etc. */
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unsigned load_next_descriptor_when_done;
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unsigned load_next_descriptor_when_done;
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unsigned long current_descriptor;
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unsigned long current_descriptor;
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unsigned long source, destination, source_mask, destination_mask;
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oraddr_t source, destination, source_mask, destination_mask;
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unsigned long chunk_size, total_size, words_transferred;
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unsigned long chunk_size, total_size, words_transferred;
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/* The interface registers */
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/* The interface registers */
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struct
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struct
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{
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{
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oraddr_t baseaddr;
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oraddr_t baseaddr;
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/* Which interrupt number we generate */
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/* Which interrupt number we generate */
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unsigned irq;
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unsigned irq;
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/* VAPI id */
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int vapi_id;
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/* Controller Registers */
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/* Controller Registers */
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struct
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struct
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{
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{
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unsigned long csr;
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unsigned long csr;
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unsigned long int_msk_a;
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unsigned long int_msk_a;
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unsigned long int_src_b;
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unsigned long int_src_b;
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} regs;
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} regs;
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/* Channels */
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/* Channels */
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struct dma_channel ch[DMA_NUM_CHANNELS];
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struct dma_channel ch[DMA_NUM_CHANNELS];
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struct dma_controller *next;
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};
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};
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void set_dma_req_i( struct dma_channel *channel );
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void clear_dma_req_i( struct dma_channel *channel );
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void set_dma_nd_i( struct dma_channel *channel );
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void clear_dma_nd_i( struct dma_channel *channel );
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unsigned check_dma_ack_o( struct dma_channel *channel );
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struct dma_channel *find_dma_controller_ch( unsigned controller,
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unsigned channel );
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