126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Definitions for the Intel DMA controller.
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*
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*
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*
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* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
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* Miran Grca, <mgrca8@gmail.com>
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* Sarah Walker, <https://pcem-emulator.co.uk/>
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*
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* Copyright 2017-2020 Fred N. van Kempen.
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* Copyright 2016-2020 Miran Grca.
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* Copyright 2008-2020 Sarah Walker.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the:
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*
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* Free Software Foundation, Inc.
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* 59 Temple Place - Suite 330
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* Boston, MA 02111-1307
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* USA.
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*/
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#ifndef EMU_DMA_H
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#define EMU_DMA_H
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#define DMA_NODATA -1
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#define DMA_OVER 0x10000
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#define DMA_VERIFY 0x20000
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typedef struct dma_t {
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uint8_t m;
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uint8_t mode;
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uint8_t page;
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uint8_t stat;
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uint8_t stat_rq;
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uint8_t command;
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uint8_t ps2_mode;
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uint8_t arb_level;
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uint8_t sg_command;
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uint8_t sg_status;
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uint8_t ptr0;
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uint8_t enabled;
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uint8_t ext_mode;
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uint8_t page_l;
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uint8_t page_h;
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uint8_t pad;
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uint16_t cb;
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uint16_t io_addr;
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uint16_t base;
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uint16_t transfer_mode;
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uint32_t ptr;
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uint32_t ptr_cur;
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uint32_t addr;
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uint32_t ab;
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uint32_t ac;
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int cc;
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int wp;
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int size;
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int count;
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int eot;
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} dma_t;
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extern dma_t dma[8];
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extern uint8_t dma_e;
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extern uint8_t dma_m;
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extern void dma_init(void);
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extern void dma16_init(void);
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extern void ps2_dma_init(void);
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extern void dma_reset(void);
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extern int dma_mode(int channel);
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extern void readdma0(void);
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extern int readdma1(void);
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extern uint8_t readdma2(void);
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extern int readdma3(void);
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extern void writedma2(uint8_t temp);
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extern int dma_get_drq(int channel);
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extern void dma_set_drq(int channel, int set);
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extern int dma_channel_read_only(int channel);
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extern int dma_channel_advance(int channel);
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extern int dma_channel_read(int channel);
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extern int dma_channel_write(int channel, uint16_t val);
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extern void dma_alias_set(void);
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extern void dma_alias_set_piix(void);
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extern void dma_alias_remove(void);
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extern void dma_alias_remove_piix(void);
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extern void dma_bm_read(uint32_t PhysAddress, uint8_t *DataRead, uint32_t TotalSize, int TransferSize);
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extern void dma_bm_write(uint32_t PhysAddress, const uint8_t *DataWrite, uint32_t TotalSize, int TransferSize);
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void dma_set_params(uint8_t advanced, uint32_t mask);
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void dma_set_mask(uint32_t mask);
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void dma_set_at(uint8_t at);
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void dma_ext_mode_init(void);
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void dma_high_page_init(void);
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void dma_remove_sg(void);
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void dma_set_sg_base(uint8_t sg_base);
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extern int dma_channel_readable(int channel);
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#endif /*EMU_DMA_H*/
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