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[/] [openrisc/] [trunk/] [or1ksim/] [peripheral/] [dma.h] - Rev 452
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/* dma.h -- Definition of DMA<->peripheral interface Copyright (C) 2001 by Erez Volk, erez@opencores.org Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. 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 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ #ifndef DMA__H #define DMA__H /* Package includes */ #include "dma-defs.h" #include "sim-config.h" /* Implementation of DMA Channel Registers and State */ struct dma_channel { /* The controller we belong to */ struct dma_controller *controller; /* Our channel number and bit mask */ unsigned channel_number; unsigned long channel_mask; /* Used for dump, to save dumping all 32 channels */ unsigned referenced; /* Inner state of transfer etc. */ unsigned load_next_descriptor_when_done; unsigned long current_descriptor; oraddr_t source, destination, source_mask, destination_mask; unsigned long chunk_size, total_size, words_transferred; /* The interface registers */ struct { unsigned long csr; unsigned long sz; unsigned long a0; unsigned long am0; unsigned long a1; unsigned long am1; unsigned long desc; unsigned long swptr; } regs; /* Some control signals */ unsigned dma_req_i; unsigned dma_ack_o; unsigned dma_nd_i; }; /* Implementation of DMA Controller Registers and State */ struct dma_controller { /* Is peripheral enabled */ int enabled; /* Base address in memory */ oraddr_t baseaddr; /* Which interrupt number we generate */ unsigned irq; /* VAPI id */ int vapi_id; /* Controller Registers */ struct { unsigned long csr; unsigned long int_msk_a; unsigned long int_msk_b; unsigned long int_src_a; unsigned long int_src_b; } regs; /* Channels */ struct dma_channel ch[DMA_NUM_CHANNELS]; struct dma_controller *next; }; void set_dma_req_i (struct dma_channel *channel); void clear_dma_req_i (struct dma_channel *channel); void set_dma_nd_i (struct dma_channel *channel); void clear_dma_nd_i (struct dma_channel *channel); unsigned check_dma_ack_o (struct dma_channel *channel); struct dma_channel *find_dma_controller_ch (unsigned controller, unsigned channel); /* Prototype for external use */ extern void reg_dma_sec (); #endif /* DMA__H */
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